Merge changes from CUPS 1.6svn-r10510.

[thirdparty/cups.git] / scheduler / ipp.c

/*
 * "$Id: ipp.c 7944 2008-09-16 22:32:42Z mike $"
 *
 *   IPP routines for the CUPS scheduler.
 *
 *   Copyright 2007-2012 by Apple Inc.
 *   Copyright 1997-2007 by Easy Software Products, all rights reserved.
 *
 *   This file contains Kerberos support code, copyright 2006 by
 *   Jelmer Vernooij.
 *
 *   These coded instructions, statements, and computer programs are the
 *   property of Apple Inc. and are protected by Federal copyright
 *   law.  Distribution and use rights are outlined in the file "LICENSE.txt"
 *   which should have been included with this file.  If this file is
 *   file is missing or damaged, see the license at "http://www.cups.org/".
 *
 * Contents:
 *
 *   cupsdProcessIPPRequest()    - Process an incoming IPP request.
 *   cupsdTimeoutJob()           - Timeout a job waiting on job files.
 *   accept_jobs()               - Accept print jobs to a printer.
 *   add_class()                 - Add a class to the system.
 *   add_file()                  - Add a file to a job.
 *   add_job()                   - Add a job to a print queue.
 *   add_job_subscriptions()     - Add any subscriptions for a job.
 *   add_job_uuid()              - Add job-uuid attribute to a job.
 *   add_printer()               - Add a printer to the system.
 *   add_printer_state_reasons() - Add the "printer-state-reasons" attribute
 *                                 based upon the printer state...
 *   add_queued_job_count()      - Add the "queued-job-count" attribute for the
 *                                 specified printer or class.
 *   apply_printer_defaults()    - Apply printer default options to a job.
 *   authenticate_job()          - Set job authentication info.
 *   cancel_all_jobs()           - Cancel all or selected print jobs.
 *   cancel_job()                - Cancel a print job.
 *   cancel_subscription()       - Cancel a subscription.
 *   check_rss_recipient()       - Check that we do not have a duplicate RSS
 *                                 feed URI.
 *   check_quotas()              - Check quotas for a printer and user.
 *   close_job()                 - Close a multi-file job.
 *   copy_attrs()                - Copy attributes from one request to another.
 *   copy_banner()               - Copy a banner file to the requests directory
 *                                 for the specified job.
 *   copy_file()                 - Copy a PPD file or interface script...
 *   copy_model()                - Copy a PPD model file, substituting default
 *                                 values as needed...
 *   copy_job_attrs()            - Copy job attributes.
 *   copy_printer_attrs()        - Copy printer attributes.
 *   copy_subscription_attrs()   - Copy subscription attributes.
 *   create_job()                - Print a file to a printer or class.
 *   create_requested_array()    - Create an array for the requested-attributes.
 *   create_subscription()       - Create a notification subscription.
 *   delete_printer()            - Remove a printer or class from the system.
 *   get_default()               - Get the default destination.
 *   get_devices()               - Get the list of available devices on the
 *                                 local system.
 *   get_document()              - Get a copy of a job file.
 *   get_job_attrs()             - Get job attributes.
 *   get_jobs()                  - Get a list of jobs for the specified printer.
 *   get_notifications()         - Get events for a subscription.
 *   get_ppd()                   - Get a named PPD from the local system.
 *   get_ppds()                  - Get the list of PPD files on the local
 *                                 system.
 *   get_printer_attrs()         - Get printer attributes.
 *   get_printer_supported()     - Get printer supported values.
 *   get_printers()              - Get a list of printers or classes.
 *   get_subscription_attrs()    - Get subscription attributes.
 *   get_subscriptions()         - Get subscriptions.
 *   get_username()              - Get the username associated with a request.
 *   hold_job()                  - Hold a print job.
 *   hold_new_jobs()             - Hold pending/new jobs on a printer or class.
 *   move_job()                  - Move a job to a new destination.
 *   ppd_parse_line()            - Parse a PPD default line.
 *   print_job()                 - Print a file to a printer or class.
 *   read_job_ticket()           - Read a job ticket embedded in a print file.
 *   reject_jobs()               - Reject print jobs to a printer.
 *   release_held_new_jobs()     - Release pending/new jobs on a printer or
 *                                 class.
 *   release_job()               - Release a held print job.
 *   renew_subscription()        - Renew an existing subscription...
 *   restart_job()               - Restart an old print job.
 *   save_auth_info()            - Save authentication information for a job.
 *   send_document()             - Send a file to a printer or class.
 *   send_http_error()           - Send a HTTP error back to the IPP client.
 *   send_ipp_status()           - Send a status back to the IPP client.
 *   set_default()               - Set the default destination...
 *   set_job_attrs()             - Set job attributes.
 *   set_printer_attrs()         - Set printer attributes.
 *   set_printer_defaults()      - Set printer default options from a request.
 *   start_printer()             - Start a printer.
 *   stop_printer()              - Stop a printer.
 *   url_encode_attr()           - URL-encode a string attribute.
 *   url_encode_string()         - URL-encode a string.
 *   user_allowed()              - See if a user is allowed to print to a queue.
 *   validate_job()              - Validate printer options and destination.
 *   validate_name()             - Make sure the printer name only contains
 *                                 valid chars.
 *   validate_user()             - Validate the user for the request.
 */

/*
 * Include necessary headers...
 */

#include "cupsd.h"
#include <cups/ppd-private.h>

#ifdef __APPLE__
/*#  include <ApplicationServices/ApplicationServices.h>
extern CFUUIDRef ColorSyncCreateUUIDFromUInt32(unsigned id);
#  include <CoreFoundation/CoreFoundation.h>*/
#  ifdef HAVE_MEMBERSHIP_H
#    include <membership.h>
#  endif /* HAVE_MEMBERSHIP_H */
#  ifdef HAVE_MEMBERSHIPPRIV_H
#    include <membershipPriv.h>
#  else
extern int mbr_user_name_to_uuid(const char* name, uuid_t uu);
extern int mbr_group_name_to_uuid(const char* name, uuid_t uu);
extern int mbr_check_membership_by_id(uuid_t user, gid_t group, int* ismember);
#  endif /* HAVE_MEMBERSHIPPRIV_H */
#endif /* __APPLE__ */


/*
 * Local functions...
 */

static void     accept_jobs(cupsd_client_t *con, ipp_attribute_t *uri);
static void     add_class(cupsd_client_t *con, ipp_attribute_t *uri);
static int      add_file(cupsd_client_t *con, cupsd_job_t *job,
                         mime_type_t *filetype, int compression);
static cupsd_job_t *add_job(cupsd_client_t *con, cupsd_printer_t *printer,
                            mime_type_t *filetype);
static void     add_job_subscriptions(cupsd_client_t *con, cupsd_job_t *job);
static void     add_job_uuid(cupsd_job_t *job);
static void     add_printer(cupsd_client_t *con, ipp_attribute_t *uri);
static void     add_printer_state_reasons(cupsd_client_t *con,
                                          cupsd_printer_t *p);
static void     add_queued_job_count(cupsd_client_t *con, cupsd_printer_t *p);
static void     apply_printer_defaults(cupsd_printer_t *printer,
                                       cupsd_job_t *job);
static void     authenticate_job(cupsd_client_t *con, ipp_attribute_t *uri);
static void     cancel_all_jobs(cupsd_client_t *con, ipp_attribute_t *uri);
static void     cancel_job(cupsd_client_t *con, ipp_attribute_t *uri);
static void     cancel_subscription(cupsd_client_t *con, int id);
static int      check_rss_recipient(const char *recipient);
static int      check_quotas(cupsd_client_t *con, cupsd_printer_t *p);
static void     close_job(cupsd_client_t *con, ipp_attribute_t *uri);
static void     copy_attrs(ipp_t *to, ipp_t *from, cups_array_t *ra,
                           ipp_tag_t group, int quickcopy,
                           cups_array_t *exclude);
static int      copy_banner(cupsd_client_t *con, cupsd_job_t *job,
                            const char *name);
static int      copy_file(const char *from, const char *to);
static int      copy_model(cupsd_client_t *con, const char *from,
                           const char *to);
static void     copy_job_attrs(cupsd_client_t *con,
                               cupsd_job_t *job,
                               cups_array_t *ra, cups_array_t *exclude);
static void     copy_printer_attrs(cupsd_client_t *con,
                                   cupsd_printer_t *printer,
                                   cups_array_t *ra);
static void     copy_subscription_attrs(cupsd_client_t *con,
                                        cupsd_subscription_t *sub,
                                        cups_array_t *ra,
                                        cups_array_t *exclude);
static void     create_job(cupsd_client_t *con, ipp_attribute_t *uri);
static cups_array_t *create_requested_array(ipp_t *request);
static void     create_subscription(cupsd_client_t *con, ipp_attribute_t *uri);
static void     delete_printer(cupsd_client_t *con, ipp_attribute_t *uri);
static void     get_default(cupsd_client_t *con);
static void     get_devices(cupsd_client_t *con);
static void     get_document(cupsd_client_t *con, ipp_attribute_t *uri);
static void     get_jobs(cupsd_client_t *con, ipp_attribute_t *uri);
static void     get_job_attrs(cupsd_client_t *con, ipp_attribute_t *uri);
static void     get_notifications(cupsd_client_t *con);
static void     get_ppd(cupsd_client_t *con, ipp_attribute_t *uri);
static void     get_ppds(cupsd_client_t *con);
static void     get_printers(cupsd_client_t *con, int type);
static void     get_printer_attrs(cupsd_client_t *con, ipp_attribute_t *uri);
static void     get_printer_supported(cupsd_client_t *con, ipp_attribute_t *uri);
static void     get_subscription_attrs(cupsd_client_t *con, int sub_id);
static void     get_subscriptions(cupsd_client_t *con, ipp_attribute_t *uri);
static const char *get_username(cupsd_client_t *con);
static void     hold_job(cupsd_client_t *con, ipp_attribute_t *uri);
static void     hold_new_jobs(cupsd_client_t *con, ipp_attribute_t *uri);
static void     move_job(cupsd_client_t *con, ipp_attribute_t *uri);
static int      ppd_parse_line(const char *line, char *option, int olen,
                               char *choice, int clen);
static void     print_job(cupsd_client_t *con, ipp_attribute_t *uri);
static void     read_job_ticket(cupsd_client_t *con);
static void     reject_jobs(cupsd_client_t *con, ipp_attribute_t *uri);
static void     release_held_new_jobs(cupsd_client_t *con,
                                      ipp_attribute_t *uri);
static void     release_job(cupsd_client_t *con, ipp_attribute_t *uri);
static void     renew_subscription(cupsd_client_t *con, int sub_id);
static void     restart_job(cupsd_client_t *con, ipp_attribute_t *uri);
static void     save_auth_info(cupsd_client_t *con, cupsd_job_t *job,
                               ipp_attribute_t *auth_info);
static void     send_document(cupsd_client_t *con, ipp_attribute_t *uri);
static void     send_http_error(cupsd_client_t *con, http_status_t status,
                                cupsd_printer_t *printer);
static void     send_ipp_status(cupsd_client_t *con, ipp_status_t status,
                                const char *message, ...)
                __attribute__((__format__(__printf__, 3, 4)));
static void     set_default(cupsd_client_t *con, ipp_attribute_t *uri);
static void     set_job_attrs(cupsd_client_t *con, ipp_attribute_t *uri);
static void     set_printer_attrs(cupsd_client_t *con, ipp_attribute_t *uri);
static void     set_printer_defaults(cupsd_client_t *con,
                                     cupsd_printer_t *printer);
static void     start_printer(cupsd_client_t *con, ipp_attribute_t *uri);
static void     stop_printer(cupsd_client_t *con, ipp_attribute_t *uri);
static void     url_encode_attr(ipp_attribute_t *attr, char *buffer,
                                int bufsize);
static char     *url_encode_string(const char *s, char *buffer, int bufsize);
static int      user_allowed(cupsd_printer_t *p, const char *username);
static void     validate_job(cupsd_client_t *con, ipp_attribute_t *uri);
static int      validate_name(const char *name);
static int      validate_user(cupsd_job_t *job, cupsd_client_t *con,
                              const char *owner, char *username,
                              int userlen);


/*
 * 'cupsdProcessIPPRequest()' - Process an incoming IPP request.
 */

int                                     /* O - 1 on success, 0 on failure */
cupsdProcessIPPRequest(
    cupsd_client_t *con)                /* I - Client connection */
{
  ipp_tag_t             group;          /* Current group tag */
  ipp_attribute_t       *attr;          /* Current attribute */
  ipp_attribute_t       *charset;       /* Character set attribute */
  ipp_attribute_t       *language;      /* Language attribute */
  ipp_attribute_t       *uri = NULL;    /* Printer or job URI attribute */
  ipp_attribute_t       *username;      /* requesting-user-name attr */
  int                   sub_id;         /* Subscription ID */


  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "cupsdProcessIPPRequest(%p[%d]): operation_id = %04x",
                  con, con->http.fd, con->request->request.op.operation_id);

 /*
  * First build an empty response message for this request...
  */

  con->response = ippNew();

  con->response->request.status.version[0] =
      con->request->request.op.version[0];
  con->response->request.status.version[1] =
      con->request->request.op.version[1];
  con->response->request.status.request_id =
      con->request->request.op.request_id;

 /*
  * Then validate the request header and required attributes...
  */

  if (con->request->request.any.version[0] != 1 &&
      con->request->request.any.version[0] != 2)
  {
   /*
    * Return an error, since we only support IPP 1.x and 2.x.
    */

    cupsdAddEvent(CUPSD_EVENT_SERVER_AUDIT, NULL, NULL,
                  "%04X %s Bad request version number %d.%d",
                  IPP_VERSION_NOT_SUPPORTED, con->http.hostname,
                  con->request->request.any.version[0],
                  con->request->request.any.version[1]);

    send_ipp_status(con, IPP_VERSION_NOT_SUPPORTED,
                    _("Bad request version number %d.%d."),
                    con->request->request.any.version[0],
                    con->request->request.any.version[1]);
  }
  else if (con->request->request.any.request_id < 1)
  {
   /*
    * Return an error, since request IDs must be between 1 and 2^31-1
    */

    cupsdAddEvent(CUPSD_EVENT_SERVER_AUDIT, NULL, NULL,
                  "%04X %s Bad request ID %d",
                  IPP_BAD_REQUEST, con->http.hostname,
                  con->request->request.any.request_id);

    send_ipp_status(con, IPP_BAD_REQUEST, _("Bad request ID %d."),
                    con->request->request.any.request_id);
  }
  else if (!con->request->attrs)
  {
    cupsdAddEvent(CUPSD_EVENT_SERVER_AUDIT, NULL, NULL,
                  "%04X %s No attributes in request",
                  IPP_BAD_REQUEST, con->http.hostname);

    send_ipp_status(con, IPP_BAD_REQUEST, _("No attributes in request."));
  }
  else
  {
   /*
    * Make sure that the attributes are provided in the correct order and
    * don't repeat groups...
    */

    for (attr = con->request->attrs, group = attr->group_tag;
         attr;
         attr = attr->next)
      if (attr->group_tag < group && attr->group_tag != IPP_TAG_ZERO)
      {
       /*
        * Out of order; return an error...
        */

        cupsdAddEvent(CUPSD_EVENT_SERVER_AUDIT, NULL, NULL,
                      "%04X %s Attribute groups are out of order",
                      IPP_BAD_REQUEST, con->http.hostname);

        send_ipp_status(con, IPP_BAD_REQUEST,
                        _("Attribute groups are out of order (%x < %x)."),
                        attr->group_tag, group);
        break;
      }
      else
        group = attr->group_tag;

    if (!attr)
    {
     /*
      * Then make sure that the first three attributes are:
      *
      *     attributes-charset
      *     attributes-natural-language
      *     printer-uri/job-uri
      */

      attr = con->request->attrs;
      if (attr && attr->name &&
          !strcmp(attr->name, "attributes-charset") &&
          (attr->value_tag & IPP_TAG_MASK) == IPP_TAG_CHARSET)
        charset = attr;
      else
        charset = NULL;

      if (attr)
        attr = attr->next;

      if (attr && attr->name &&
          !strcmp(attr->name, "attributes-natural-language") &&
          (attr->value_tag & IPP_TAG_MASK) == IPP_TAG_LANGUAGE)
        language = attr;
      else
        language = NULL;

      if ((attr = ippFindAttribute(con->request, "printer-uri",
                                   IPP_TAG_URI)) != NULL)
        uri = attr;
      else if ((attr = ippFindAttribute(con->request, "job-uri",
                                        IPP_TAG_URI)) != NULL)
        uri = attr;
      else if (con->request->request.op.operation_id == CUPS_GET_PPD)
        uri = ippFindAttribute(con->request, "ppd-name", IPP_TAG_NAME);
      else
        uri = NULL;

      if (charset)
        ippAddString(con->response, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
                     "attributes-charset", NULL,
                     charset->values[0].string.text);
      else
        ippAddString(con->response, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
                     "attributes-charset", NULL, "utf-8");

      if (language)
        ippAddString(con->response, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
                     "attributes-natural-language", NULL,
                     language->values[0].string.text);
      else
        ippAddString(con->response, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
                     "attributes-natural-language", NULL, DefaultLanguage);

      if (charset &&
          _cups_strcasecmp(charset->values[0].string.text, "us-ascii") &&
          _cups_strcasecmp(charset->values[0].string.text, "utf-8"))
      {
       /*
        * Bad character set...
        */

        cupsdLogMessage(CUPSD_LOG_ERROR, "Unsupported character set \"%s\"",
                        charset->values[0].string.text);
        cupsdAddEvent(CUPSD_EVENT_SERVER_AUDIT, NULL, NULL,
                      "%04X %s Unsupported attributes-charset value \"%s\"",
                      IPP_CHARSET, con->http.hostname,
                      charset->values[0].string.text);
        send_ipp_status(con, IPP_BAD_REQUEST,
                        _("Unsupported character set \"%s\"."),
                        charset->values[0].string.text);
      }
      else if (!charset || !language ||
               (!uri &&
                con->request->request.op.operation_id != CUPS_GET_DEFAULT &&
                con->request->request.op.operation_id != CUPS_GET_PRINTERS &&
                con->request->request.op.operation_id != CUPS_GET_CLASSES &&
                con->request->request.op.operation_id != CUPS_GET_DEVICES &&
                con->request->request.op.operation_id != CUPS_GET_PPDS))
      {
       /*
        * Return an error, since attributes-charset,
        * attributes-natural-language, and printer-uri/job-uri are required
        * for all operations.
        */

        if (!charset)
        {
          cupsdLogMessage(CUPSD_LOG_ERROR,
                          "Missing attributes-charset attribute");

          cupsdAddEvent(CUPSD_EVENT_SERVER_AUDIT, NULL, NULL,
                        "%04X %s Missing attributes-charset attribute",
                        IPP_BAD_REQUEST, con->http.hostname);
        }

        if (!language)
        {
          cupsdLogMessage(CUPSD_LOG_ERROR,
                          "Missing attributes-natural-language attribute");

          cupsdAddEvent(CUPSD_EVENT_SERVER_AUDIT, NULL, NULL,
                        "%04X %s Missing attributes-natural-language attribute",
                        IPP_BAD_REQUEST, con->http.hostname);
        }

        if (!uri)
        {
          cupsdLogMessage(CUPSD_LOG_ERROR,
                          "Missing printer-uri, job-uri, or ppd-name "
                          "attribute");

          cupsdAddEvent(CUPSD_EVENT_SERVER_AUDIT, NULL, NULL,
                        "%04X %s Missing printer-uri, job-uri, or ppd-name "
                        "attribute", IPP_BAD_REQUEST, con->http.hostname);
        }

        cupsdLogMessage(CUPSD_LOG_DEBUG, "Request attributes follow...");

        for (attr = con->request->attrs; attr; attr = attr->next)
          cupsdLogMessage(CUPSD_LOG_DEBUG,
                          "attr \"%s\": group_tag = %x, value_tag = %x",
                          attr->name ? attr->name : "(null)", attr->group_tag,
                          attr->value_tag);

        cupsdLogMessage(CUPSD_LOG_DEBUG, "End of attributes...");

        send_ipp_status(con, IPP_BAD_REQUEST,
                        _("Missing required attributes."));
      }
      else
      {
       /*
        * OK, all the checks pass so far; make sure requesting-user-name is
        * not "root" from a remote host...
        */

        if ((username = ippFindAttribute(con->request, "requesting-user-name",
                                         IPP_TAG_NAME)) != NULL)
        {
         /*
          * Check for root user...
          */

          if (!strcmp(username->values[0].string.text, "root") &&
              _cups_strcasecmp(con->http.hostname, "localhost") &&
              strcmp(con->username, "root"))
          {
           /*
            * Remote unauthenticated user masquerading as local root...
            */

            _cupsStrFree(username->values[0].string.text);
            username->values[0].string.text = _cupsStrAlloc(RemoteRoot);
          }
        }

        if ((attr = ippFindAttribute(con->request, "notify-subscription-id",
                                     IPP_TAG_INTEGER)) != NULL)
          sub_id = attr->values[0].integer;
        else
          sub_id = 0;

       /*
        * Then try processing the operation...
        */

        if (uri)
          cupsdLogMessage(CUPSD_LOG_DEBUG, "%s %s",
                          ippOpString(con->request->request.op.operation_id),
                          uri->values[0].string.text);
        else
          cupsdLogMessage(CUPSD_LOG_DEBUG, "%s",
                          ippOpString(con->request->request.op.operation_id));

        switch (con->request->request.op.operation_id)
        {
          case IPP_PRINT_JOB :
              print_job(con, uri);
              break;

          case IPP_VALIDATE_JOB :
              validate_job(con, uri);
              break;

          case IPP_CREATE_JOB :
              create_job(con, uri);
              break;

          case IPP_SEND_DOCUMENT :
              send_document(con, uri);
              break;

          case IPP_CANCEL_JOB :
              cancel_job(con, uri);
              break;

          case IPP_GET_JOB_ATTRIBUTES :
              get_job_attrs(con, uri);
              break;

          case IPP_GET_JOBS :
              get_jobs(con, uri);
              break;

          case IPP_GET_PRINTER_ATTRIBUTES :
              get_printer_attrs(con, uri);
              break;

          case IPP_GET_PRINTER_SUPPORTED_VALUES :
              get_printer_supported(con, uri);
              break;

          case IPP_HOLD_JOB :
              hold_job(con, uri);
              break;

          case IPP_RELEASE_JOB :
              release_job(con, uri);
              break;

          case IPP_RESTART_JOB :
              restart_job(con, uri);
              break;

          case IPP_PAUSE_PRINTER :
              stop_printer(con, uri);
              break;

          case IPP_RESUME_PRINTER :
              start_printer(con, uri);
              break;

          case IPP_PURGE_JOBS :
          case IPP_CANCEL_JOBS :
          case IPP_CANCEL_MY_JOBS :
              cancel_all_jobs(con, uri);
              break;

          case IPP_SET_JOB_ATTRIBUTES :
              set_job_attrs(con, uri);
              break;

          case IPP_SET_PRINTER_ATTRIBUTES :
              set_printer_attrs(con, uri);
              break;

          case IPP_HOLD_NEW_JOBS :
              hold_new_jobs(con, uri);
              break;

          case IPP_RELEASE_HELD_NEW_JOBS :
              release_held_new_jobs(con, uri);
              break;

          case IPP_CLOSE_JOB :
              close_job(con, uri);
              break;

          case CUPS_GET_DEFAULT :
              get_default(con);
              break;

          case CUPS_GET_PRINTERS :
              get_printers(con, 0);
              break;

          case CUPS_GET_CLASSES :
              get_printers(con, CUPS_PRINTER_CLASS);
              break;

          case CUPS_ADD_PRINTER :
              add_printer(con, uri);
              break;

          case CUPS_DELETE_PRINTER :
              delete_printer(con, uri);
              break;

          case CUPS_ADD_CLASS :
              add_class(con, uri);
              break;

          case CUPS_DELETE_CLASS :
              delete_printer(con, uri);
              break;

          case CUPS_ACCEPT_JOBS :
          case IPP_ENABLE_PRINTER :
              accept_jobs(con, uri);
              break;

          case CUPS_REJECT_JOBS :
          case IPP_DISABLE_PRINTER :
              reject_jobs(con, uri);
              break;

          case CUPS_SET_DEFAULT :
              set_default(con, uri);
              break;

          case CUPS_GET_DEVICES :
              get_devices(con);
              break;

          case CUPS_GET_DOCUMENT :
              get_document(con, uri);
              break;

          case CUPS_GET_PPD :
              get_ppd(con, uri);
              break;

          case CUPS_GET_PPDS :
              get_ppds(con);
              break;

          case CUPS_MOVE_JOB :
              move_job(con, uri);
              break;

          case CUPS_AUTHENTICATE_JOB :
              authenticate_job(con, uri);
              break;

          case IPP_CREATE_PRINTER_SUBSCRIPTION :
          case IPP_CREATE_JOB_SUBSCRIPTION :
              create_subscription(con, uri);
              break;

          case IPP_GET_SUBSCRIPTION_ATTRIBUTES :
              get_subscription_attrs(con, sub_id);
              break;

          case IPP_GET_SUBSCRIPTIONS :
              get_subscriptions(con, uri);
              break;

          case IPP_RENEW_SUBSCRIPTION :
              renew_subscription(con, sub_id);
              break;

          case IPP_CANCEL_SUBSCRIPTION :
              cancel_subscription(con, sub_id);
              break;

          case IPP_GET_NOTIFICATIONS :
              get_notifications(con);
              break;

          default :
              cupsdAddEvent(CUPSD_EVENT_SERVER_AUDIT, NULL, NULL,
                            "%04X %s Operation %04X (%s) not supported",
                            IPP_OPERATION_NOT_SUPPORTED, con->http.hostname,
                            con->request->request.op.operation_id,
                            ippOpString(con->request->request.op.operation_id));

              send_ipp_status(con, IPP_OPERATION_NOT_SUPPORTED,
                              _("%s not supported."),
                              ippOpString(
                                  con->request->request.op.operation_id));
              break;
        }
      }
    }
  }

  if (con->response)
  {
   /*
    * Sending data from the scheduler...
    */

    cupsdLogMessage(con->response->request.status.status_code
                        >= IPP_BAD_REQUEST &&
                    con->response->request.status.status_code
                        != IPP_NOT_FOUND ? CUPSD_LOG_ERROR : CUPSD_LOG_DEBUG,
                    "Returning IPP %s for %s (%s) from %s",
                    ippErrorString(con->response->request.status.status_code),
                    ippOpString(con->request->request.op.operation_id),
                    uri ? uri->values[0].string.text : "no URI",
                    con->http.hostname);

    if (LogLevel == CUPSD_LOG_DEBUG2)
      cupsdLogMessage(CUPSD_LOG_DEBUG2,
                      "cupsdProcessIPPRequest: ippLength(response)=%ld",
                      (long)ippLength(con->response));

    if (cupsdSendHeader(con, HTTP_OK, "application/ipp", CUPSD_AUTH_NONE))
    {
#ifdef CUPSD_USE_CHUNKING
     /*
      * Because older versions of CUPS (1.1.17 and older) and some IPP
      * clients do not implement chunking properly, we cannot use
      * chunking by default.  This may become the default in future
      * CUPS releases, or we might add a configuration directive for
      * it.
      */

      if (con->http.version == HTTP_1_1)
      {
        if (httpPrintf(HTTP(con), "Transfer-Encoding: chunked\r\n\r\n") < 0)
          return (0);

        if (cupsdFlushHeader(con) < 0)
          return (0);

        con->http.data_encoding = HTTP_ENCODE_CHUNKED;
      }
      else
#endif /* CUPSD_USE_CHUNKING */
      {
        size_t  length;                 /* Length of response */


        length = ippLength(con->response);

        if (con->file >= 0 && !con->pipe_pid)
        {
          struct stat   fileinfo;       /* File information */


          if (!fstat(con->file, &fileinfo))
            length += fileinfo.st_size;
        }

        if (httpPrintf(HTTP(con), "Content-Length: " CUPS_LLFMT "\r\n\r\n",
                       CUPS_LLCAST length) < 0)
          return (0);

        if (cupsdFlushHeader(con) < 0)
          return (0);

        con->http.data_encoding  = HTTP_ENCODE_LENGTH;
        con->http.data_remaining = length;

        if (con->http.data_remaining <= INT_MAX)
          con->http._data_remaining = con->http.data_remaining;
        else
          con->http._data_remaining = INT_MAX;
      }

      cupsdAddSelect(con->http.fd, (cupsd_selfunc_t)cupsdReadClient,
                     (cupsd_selfunc_t)cupsdWriteClient, con);

     /*
      * Tell the caller the response header was sent successfully...
      */

      return (1);
    }
    else
    {
     /*
      * Tell the caller the response header could not be sent...
      */

      return (0);
    }
  }
  else
  {
   /*
    * Sending data from a subprocess like cups-deviced; tell the caller
    * everything is A-OK so far...
    */

    return (1);
  }
}


/*
 * 'cupsdTimeoutJob()' - Timeout a job waiting on job files.
 */

int                                     /* O - 0 on success, -1 on error */
cupsdTimeoutJob(cupsd_job_t *job)       /* I - Job to timeout */
{
  cupsd_printer_t       *printer;       /* Destination printer or class */
  ipp_attribute_t       *attr;          /* job-sheets attribute */
  int                   kbytes;         /* Kilobytes in banner */


  job->pending_timeout = 0;

 /*
  * See if we need to add the ending sheet...
  */

  if (!cupsdLoadJob(job))
    return (-1);

  printer = cupsdFindDest(job->dest);
  attr    = ippFindAttribute(job->attrs, "job-sheets", IPP_TAG_NAME);

  if (printer && !(printer->type & CUPS_PRINTER_REMOTE) &&
      attr && attr->num_values > 1)
  {
   /*
    * Yes...
    */

    cupsdLogJob(job, CUPSD_LOG_INFO, "Adding end banner page \"%s\".",
                attr->values[1].string.text);

    if ((kbytes = copy_banner(NULL, job, attr->values[1].string.text)) < 0)
      return (-1);

    cupsdUpdateQuota(printer, job->username, 0, kbytes);
  }

  return (0);
}


/*
 * 'accept_jobs()' - Accept print jobs to a printer.
 */

static void
accept_jobs(cupsd_client_t  *con,       /* I - Client connection */
            ipp_attribute_t *uri)       /* I - Printer or class URI */
{
  http_status_t status;                 /* Policy status */
  cups_ptype_t  dtype;                  /* Destination type (printer/class) */
  cupsd_printer_t *printer;             /* Printer data */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "accept_jobs(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Is the destination valid?
  */

  if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(printer->op_policy_ptr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, printer);
    return;
  }

 /*
  * Accept jobs sent to the printer...
  */

  printer->accepting        = 1;
  printer->state_message[0] = '\0';

  cupsdAddEvent(CUPSD_EVENT_PRINTER_STATE, printer, NULL,
                "Now accepting jobs.");

  if (dtype & CUPS_PRINTER_CLASS)
  {
    cupsdMarkDirty(CUPSD_DIRTY_CLASSES);

    cupsdLogMessage(CUPSD_LOG_INFO, "Class \"%s\" now accepting jobs (\"%s\").",
                    printer->name, get_username(con));
  }
  else
  {
    cupsdMarkDirty(CUPSD_DIRTY_PRINTERS);

    cupsdLogMessage(CUPSD_LOG_INFO,
                    "Printer \"%s\" now accepting jobs (\"%s\").",
                    printer->name, get_username(con));
  }

 /*
  * Everything was ok, so return OK status...
  */

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'add_class()' - Add a class to the system.
 */

static void
add_class(cupsd_client_t  *con,         /* I - Client connection */
          ipp_attribute_t *uri)         /* I - URI of class */
{
  http_status_t status;                 /* Policy status */
  int           i;                      /* Looping var */
  char          scheme[HTTP_MAX_URI],   /* Method portion of URI */
                username[HTTP_MAX_URI], /* Username portion of URI */
                host[HTTP_MAX_URI],     /* Host portion of URI */
                resource[HTTP_MAX_URI]; /* Resource portion of URI */
  int           port;                   /* Port portion of URI */
  cupsd_printer_t *pclass,              /* Class */
                *member;                /* Member printer/class */
  cups_ptype_t  dtype;                  /* Destination type */
  ipp_attribute_t *attr;                /* Printer attribute */
  int           modify;                 /* Non-zero if we just modified */
  int           need_restart_job;       /* Need to restart job? */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "add_class(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Do we have a valid URI?
  */

  httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text, scheme,
                  sizeof(scheme), username, sizeof(username), host,
                  sizeof(host), &port, resource, sizeof(resource));


  if (strncmp(resource, "/classes/", 9) || strlen(resource) == 9)
  {
   /*
    * No, return an error...
    */

    send_ipp_status(con, IPP_BAD_REQUEST,
                    _("The printer-uri must be of the form "
                      "\"ipp://HOSTNAME/classes/CLASSNAME\"."));
    return;
  }

 /*
  * Do we have a valid printer name?
  */

  if (!validate_name(resource + 9))
  {
   /*
    * No, return an error...
    */

    send_ipp_status(con, IPP_BAD_REQUEST,
                    _("The printer-uri \"%s\" contains invalid characters."),
                    uri->values[0].string.text);
    return;
  }

 /*
  * See if the class already exists; if not, create a new class...
  */

  if ((pclass = cupsdFindClass(resource + 9)) == NULL)
  {
   /*
    * Class doesn't exist; see if we have a printer of the same name...
    */

    if ((pclass = cupsdFindPrinter(resource + 9)) != NULL)
    {
     /*
      * Yes, return an error...
      */

      send_ipp_status(con, IPP_NOT_POSSIBLE,
                      _("A printer named \"%s\" already exists."),
                      resource + 9);
      return;
    }

   /*
    * No, check the default policy and then add the class...
    */

    if ((status = cupsdCheckPolicy(DefaultPolicyPtr, con, NULL)) != HTTP_OK)
    {
      send_http_error(con, status, NULL);
      return;
    }

    pclass = cupsdAddClass(resource + 9);
    modify = 0;
  }
  else if ((status = cupsdCheckPolicy(pclass->op_policy_ptr, con,
                                      NULL)) != HTTP_OK)
  {
    send_http_error(con, status, pclass);
    return;
  }
  else
    modify = 1;

 /*
  * Look for attributes and copy them over as needed...
  */

  need_restart_job = 0;

  if ((attr = ippFindAttribute(con->request, "printer-location",
                               IPP_TAG_TEXT)) != NULL)
    cupsdSetString(&pclass->location, attr->values[0].string.text);

  if ((attr = ippFindAttribute(con->request, "printer-info",
                               IPP_TAG_TEXT)) != NULL)
    cupsdSetString(&pclass->info, attr->values[0].string.text);

  if ((attr = ippFindAttribute(con->request, "printer-is-accepting-jobs",
                               IPP_TAG_BOOLEAN)) != NULL &&
      attr->values[0].boolean != pclass->accepting)
  {
    cupsdLogMessage(CUPSD_LOG_INFO,
                    "Setting %s printer-is-accepting-jobs to %d (was %d.)",
                    pclass->name, attr->values[0].boolean, pclass->accepting);

    pclass->accepting = attr->values[0].boolean;

    cupsdAddEvent(CUPSD_EVENT_PRINTER_STATE, pclass, NULL, "%s accepting jobs.",
                  pclass->accepting ? "Now" : "No longer");
  }

  if ((attr = ippFindAttribute(con->request, "printer-is-shared",
                               IPP_TAG_BOOLEAN)) != NULL)
  {
    if (pclass->shared && !attr->values[0].boolean)
      cupsdDeregisterPrinter(pclass, 1);

    cupsdLogMessage(CUPSD_LOG_INFO,
                    "Setting %s printer-is-shared to %d (was %d.)",
                    pclass->name, attr->values[0].boolean, pclass->shared);

    pclass->shared = attr->values[0].boolean;
  }

  if ((attr = ippFindAttribute(con->request, "printer-state",
                               IPP_TAG_ENUM)) != NULL)
  {
    if (attr->values[0].integer != IPP_PRINTER_IDLE &&
        attr->values[0].integer != IPP_PRINTER_STOPPED)
    {
      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Attempt to set %s printer-state to bad value %d."),
                      pclass->name, attr->values[0].integer);
      return;
    }

    cupsdLogMessage(CUPSD_LOG_INFO, "Setting %s printer-state to %d (was %d.)",
                    pclass->name, attr->values[0].integer, pclass->state);

    if (attr->values[0].integer == IPP_PRINTER_STOPPED)
      cupsdStopPrinter(pclass, 0);
    else
    {
      cupsdSetPrinterState(pclass, (ipp_pstate_t)(attr->values[0].integer), 0);
      need_restart_job = 1;
    }
  }
  if ((attr = ippFindAttribute(con->request, "printer-state-message",
                               IPP_TAG_TEXT)) != NULL)
  {
    strlcpy(pclass->state_message, attr->values[0].string.text,
            sizeof(pclass->state_message));

    cupsdAddEvent(CUPSD_EVENT_PRINTER_STATE, pclass, NULL, "%s",
                  pclass->state_message);
  }
  if ((attr = ippFindAttribute(con->request, "member-uris",
                               IPP_TAG_URI)) != NULL)
  {
   /*
    * Clear the printer array as needed...
    */

    need_restart_job = 1;

    if (pclass->num_printers > 0)
    {
      free(pclass->printers);
      pclass->num_printers = 0;
    }

   /*
    * Add each printer or class that is listed...
    */

    for (i = 0; i < attr->num_values; i ++)
    {
     /*
      * Search for the printer or class URI...
      */

      if (!cupsdValidateDest(attr->values[i].string.text, &dtype, &member))
      {
       /*
        * Bad URI...
        */

        send_ipp_status(con, IPP_NOT_FOUND,
                        _("The printer or class does not exist."));
        return;
      }
      else if (dtype & CUPS_PRINTER_CLASS)
      {
        send_ipp_status(con, IPP_BAD_REQUEST,
                        _("Nested classes are not allowed."));
        return;
      }

     /*
      * Add it to the class...
      */

      cupsdAddPrinterToClass(pclass, member);
    }
  }

  set_printer_defaults(con, pclass);

  if ((attr = ippFindAttribute(con->request, "auth-info-required",
                               IPP_TAG_KEYWORD)) != NULL)
    cupsdSetAuthInfoRequired(pclass, NULL, attr);

 /*
  * Update the printer class attributes and return...
  */

  cupsdSetPrinterAttrs(pclass);
  cupsdMarkDirty(CUPSD_DIRTY_CLASSES);

  if (need_restart_job && pclass->job)
  {
   /*
    * Reset the current job to a "pending" status...
    */

    cupsdSetJobState(pclass->job, IPP_JOB_PENDING, CUPSD_JOB_FORCE,
                     "Job restarted because the class was modified.");
  }

  cupsdMarkDirty(CUPSD_DIRTY_PRINTCAP);

  if (modify)
  {
    cupsdAddEvent(CUPSD_EVENT_PRINTER_MODIFIED,
                  pclass, NULL, "Class \"%s\" modified by \"%s\".",
                  pclass->name, get_username(con));

    cupsdLogMessage(CUPSD_LOG_INFO, "Class \"%s\" modified by \"%s\".",
                    pclass->name, get_username(con));
  }
  else
  {
    cupsdAddEvent(CUPSD_EVENT_PRINTER_ADDED,
                  pclass, NULL, "New class \"%s\" added by \"%s\".",
                  pclass->name, get_username(con));

    cupsdLogMessage(CUPSD_LOG_INFO, "New class \"%s\" added by \"%s\".",
                    pclass->name, get_username(con));
  }

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'add_file()' - Add a file to a job.
 */

static int                              /* O - 0 on success, -1 on error */
add_file(cupsd_client_t *con,           /* I - Connection to client */
         cupsd_job_t    *job,           /* I - Job to add to */
         mime_type_t    *filetype,      /* I - Type of file */
         int            compression)    /* I - Compression */
{
  mime_type_t   **filetypes;            /* New filetypes array... */
  int           *compressions;          /* New compressions array... */


  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "add_file(con=%p[%d], job=%d, filetype=%s/%s, "
                  "compression=%d)", con, con ? con->http.fd : -1, job->id,
                  filetype->super, filetype->type, compression);

 /*
  * Add the file to the job...
  */

  if (job->num_files == 0)
  {
    compressions = (int *)malloc(sizeof(int));
    filetypes    = (mime_type_t **)malloc(sizeof(mime_type_t *));
  }
  else
  {
    compressions = (int *)realloc(job->compressions,
                                  (job->num_files + 1) * sizeof(int));
    filetypes    = (mime_type_t **)realloc(job->filetypes,
                                           (job->num_files + 1) *
                                           sizeof(mime_type_t *));
  }

  if (!compressions || !filetypes)
  {
    cupsdSetJobState(job, IPP_JOB_ABORTED, CUPSD_JOB_PURGE,
                     "Job aborted because the scheduler ran out of memory.");

    if (con)
      send_ipp_status(con, IPP_INTERNAL_ERROR,
                      _("Unable to allocate memory for file types."));

    return (-1);
  }

  job->compressions                 = compressions;
  job->compressions[job->num_files] = compression;
  job->filetypes                    = filetypes;
  job->filetypes[job->num_files]    = filetype;

  job->num_files ++;

  job->dirty = 1;
  cupsdMarkDirty(CUPSD_DIRTY_JOBS);

  return (0);
}


/*
 * 'add_job()' - Add a job to a print queue.
 */

static cupsd_job_t *                    /* O - Job object */
add_job(cupsd_client_t  *con,           /* I - Client connection */
        cupsd_printer_t *printer,       /* I - Destination printer */
        mime_type_t     *filetype)      /* I - First print file type, if any */
{
  http_status_t status;                 /* Policy status */
  ipp_attribute_t *attr,                /* Current attribute */
                *auth_info;             /* auth-info attribute */
  const char    *val;                   /* Default option value */
  int           priority;               /* Job priority */
  cupsd_job_t   *job;                   /* Current job */
  char          job_uri[HTTP_MAX_URI];  /* Job URI */
  int           kbytes;                 /* Size of print file */
  int           i;                      /* Looping var */
  int           lowerpagerange;         /* Page range bound */
  int           exact;                  /* Did we have an exact match? */
  ipp_attribute_t *media_col,           /* media-col attribute */
                *media_margin;          /* media-*-margin attribute */
  ipp_t         *unsup_col;             /* media-col in unsupported response */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "add_job(%p[%d], %p(%s), %p(%s/%s))",
                  con, con->http.fd, printer, printer->name,
                  filetype, filetype ? filetype->super : "none",
                  filetype ? filetype->type : "none");

 /*
  * Check remote printing to non-shared printer...
  */

  if (!printer->shared &&
      _cups_strcasecmp(con->http.hostname, "localhost") &&
      _cups_strcasecmp(con->http.hostname, ServerName))
  {
    send_ipp_status(con, IPP_NOT_AUTHORIZED,
                    _("The printer or class is not shared."));
    return (NULL);
  }

 /*
  * Check policy...
  */

  auth_info = ippFindAttribute(con->request, "auth-info", IPP_TAG_TEXT);

  if ((status = cupsdCheckPolicy(printer->op_policy_ptr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, printer);
    return (NULL);
  }
  else if (printer->num_auth_info_required == 1 &&
           !strcmp(printer->auth_info_required[0], "negotiate") &&
           !con->username[0])
  {
    send_http_error(con, HTTP_UNAUTHORIZED, printer);
    return (NULL);
  }
#ifdef HAVE_SSL
  else if (auth_info && !con->http.tls &&
           !httpAddrLocalhost(con->http.hostaddr))
  {
   /*
    * Require encryption of auth-info over non-local connections...
    */

    send_http_error(con, HTTP_UPGRADE_REQUIRED, printer);
    return (NULL);
  }
#endif /* HAVE_SSL */

 /*
  * See if the printer is accepting jobs...
  */

  if (!printer->accepting)
  {
    send_ipp_status(con, IPP_NOT_ACCEPTING,
                    _("Destination \"%s\" is not accepting jobs."),
                    printer->name);
    return (NULL);
  }

 /*
  * Validate job template attributes; for now just document-format,
  * copies, number-up, and page-ranges...
  */

  if (filetype && printer->filetypes &&
      !cupsArrayFind(printer->filetypes, filetype))
  {
    char        mimetype[MIME_MAX_SUPER + MIME_MAX_TYPE + 2];
                                        /* MIME media type string */


    snprintf(mimetype, sizeof(mimetype), "%s/%s", filetype->super,
             filetype->type);

    send_ipp_status(con, IPP_DOCUMENT_FORMAT,
                    _("Unsupported format \"%s\"."), mimetype);

    ippAddString(con->response, IPP_TAG_UNSUPPORTED_GROUP, IPP_TAG_MIMETYPE,
                 "document-format", NULL, mimetype);

    return (NULL);
  }

  if ((attr = ippFindAttribute(con->request, "copies",
                               IPP_TAG_INTEGER)) != NULL)
  {
    if (attr->values[0].integer < 1 || attr->values[0].integer > MaxCopies)
    {
      send_ipp_status(con, IPP_ATTRIBUTES, _("Bad copies value %d."),
                      attr->values[0].integer);
      ippAddInteger(con->response, IPP_TAG_UNSUPPORTED_GROUP, IPP_TAG_INTEGER,
                    "copies", attr->values[0].integer);
      return (NULL);
    }
  }

  if ((attr = ippFindAttribute(con->request, "job-sheets",
                               IPP_TAG_ZERO)) != NULL)
  {
    if (attr->value_tag != IPP_TAG_KEYWORD &&
        attr->value_tag != IPP_TAG_NAME)
    {
      send_ipp_status(con, IPP_BAD_REQUEST, _("Bad job-sheets value type."));
      return (NULL);
    }

    if (attr->num_values > 2)
    {
      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Too many job-sheets values (%d > 2)."),
                      attr->num_values);
      return (NULL);
    }

    for (i = 0; i < attr->num_values; i ++)
      if (strcmp(attr->values[i].string.text, "none") &&
          !cupsdFindBanner(attr->values[i].string.text))
      {
        send_ipp_status(con, IPP_BAD_REQUEST, _("Bad job-sheets value \"%s\"."),
                        attr->values[i].string.text);
        return (NULL);
      }
  }

  if ((attr = ippFindAttribute(con->request, "number-up",
                               IPP_TAG_INTEGER)) != NULL)
  {
    if (attr->values[0].integer != 1 &&
        attr->values[0].integer != 2 &&
        attr->values[0].integer != 4 &&
        attr->values[0].integer != 6 &&
        attr->values[0].integer != 9 &&
        attr->values[0].integer != 16)
    {
      send_ipp_status(con, IPP_ATTRIBUTES, _("Bad number-up value %d."),
                      attr->values[0].integer);
      ippAddInteger(con->response, IPP_TAG_UNSUPPORTED_GROUP, IPP_TAG_INTEGER,
                    "number-up", attr->values[0].integer);
      return (NULL);
    }
  }

  if ((attr = ippFindAttribute(con->request, "page-ranges",
                               IPP_TAG_RANGE)) != NULL)
  {
    for (i = 0, lowerpagerange = 1; i < attr->num_values; i ++)
    {
      if (attr->values[i].range.lower < lowerpagerange ||
          attr->values[i].range.lower > attr->values[i].range.upper)
      {
        send_ipp_status(con, IPP_BAD_REQUEST,
                        _("Bad page-ranges values %d-%d."),
                        attr->values[i].range.lower,
                        attr->values[i].range.upper);
        return (NULL);
      }

      lowerpagerange = attr->values[i].range.upper + 1;
    }
  }

 /*
  * Do media selection as needed...
  */

  if (!ippFindAttribute(con->request, "PageRegion", IPP_TAG_ZERO) &&
      !ippFindAttribute(con->request, "PageSize", IPP_TAG_ZERO) &&
      _ppdCacheGetPageSize(printer->pc, con->request, NULL, &exact))
  {
    if (!exact &&
        (media_col = ippFindAttribute(con->request, "media-col",
                                      IPP_TAG_BEGIN_COLLECTION)) != NULL)
    {
      send_ipp_status(con, IPP_OK_SUBST, _("Unsupported margins."));

      unsup_col = ippNew();
      if ((media_margin = ippFindAttribute(media_col->values[0].collection,
                                           "media-bottom-margin",
                                           IPP_TAG_INTEGER)) != NULL)
        ippAddInteger(unsup_col, IPP_TAG_ZERO, IPP_TAG_INTEGER,
                      "media-bottom-margin", media_margin->values[0].integer);

      if ((media_margin = ippFindAttribute(media_col->values[0].collection,
                                           "media-left-margin",
                                           IPP_TAG_INTEGER)) != NULL)
        ippAddInteger(unsup_col, IPP_TAG_ZERO, IPP_TAG_INTEGER,
                      "media-left-margin", media_margin->values[0].integer);

      if ((media_margin = ippFindAttribute(media_col->values[0].collection,
                                           "media-right-margin",
                                           IPP_TAG_INTEGER)) != NULL)
        ippAddInteger(unsup_col, IPP_TAG_ZERO, IPP_TAG_INTEGER,
                      "media-right-margin", media_margin->values[0].integer);

      if ((media_margin = ippFindAttribute(media_col->values[0].collection,
                                           "media-top-margin",
                                           IPP_TAG_INTEGER)) != NULL)
        ippAddInteger(unsup_col, IPP_TAG_ZERO, IPP_TAG_INTEGER,
                      "media-top-margin", media_margin->values[0].integer);

      ippAddCollection(con->response, IPP_TAG_UNSUPPORTED_GROUP, "media-col",
                       unsup_col);
      ippDelete(unsup_col);
    }
  }

 /*
  * Make sure we aren't over our limit...
  */

  if (MaxJobs && cupsArrayCount(Jobs) >= MaxJobs)
    cupsdCleanJobs();

  if (MaxJobs && cupsArrayCount(Jobs) >= MaxJobs)
  {
    send_ipp_status(con, IPP_NOT_POSSIBLE, _("Too many active jobs."));
    return (NULL);
  }

  if ((i = check_quotas(con, printer)) < 0)
  {
    send_ipp_status(con, IPP_NOT_POSSIBLE, _("Quota limit reached."));
    return (NULL);
  }
  else if (i == 0)
  {
    send_ipp_status(con, IPP_NOT_AUTHORIZED, _("Not allowed to print."));
    return (NULL);
  }

 /*
  * Create the job and set things up...
  */

  if ((attr = ippFindAttribute(con->request, "job-priority",
                               IPP_TAG_INTEGER)) != NULL)
    priority = attr->values[0].integer;
  else
  {
    if ((val = cupsGetOption("job-priority", printer->num_options,
                             printer->options)) != NULL)
      priority = atoi(val);
    else
      priority = 50;

    ippAddInteger(con->request, IPP_TAG_JOB, IPP_TAG_INTEGER, "job-priority",
                  priority);
  }

  if (!ippFindAttribute(con->request, "job-name", IPP_TAG_NAME))
    ippAddString(con->request, IPP_TAG_JOB, IPP_TAG_NAME, "job-name", NULL,
                 "Untitled");

  if ((job = cupsdAddJob(priority, printer->name)) == NULL)
  {
    send_ipp_status(con, IPP_INTERNAL_ERROR,
                    _("Unable to add job for destination \"%s\"."),
                    printer->name);
    return (NULL);
  }

  job->dtype   = printer->type & (CUPS_PRINTER_CLASS | CUPS_PRINTER_REMOTE);
  job->attrs   = con->request;
  job->dirty   = 1;
  con->request = ippNewRequest(job->attrs->request.op.operation_id);

  cupsdMarkDirty(CUPSD_DIRTY_JOBS);

  add_job_uuid(job);
  apply_printer_defaults(printer, job);

  attr = ippFindAttribute(job->attrs, "requesting-user-name", IPP_TAG_NAME);

  if (con->username[0])
  {
    cupsdSetString(&job->username, con->username);

    if (attr)
      cupsdSetString(&attr->values[0].string.text, con->username);
  }
  else if (attr)
  {
    cupsdLogMessage(CUPSD_LOG_DEBUG,
                    "add_job: requesting-user-name=\"%s\"",
                    attr->values[0].string.text);

    cupsdSetString(&job->username, attr->values[0].string.text);
  }
  else
    cupsdSetString(&job->username, "anonymous");

  if (!attr)
    ippAddString(job->attrs, IPP_TAG_JOB, IPP_TAG_NAME,
                 "job-originating-user-name", NULL, job->username);
  else
  {
    attr->group_tag = IPP_TAG_JOB;
    _cupsStrFree(attr->name);
    attr->name = _cupsStrAlloc("job-originating-user-name");
  }

  if (con->username[0] || auth_info)
  {
    save_auth_info(con, job, auth_info);

   /*
    * Remove the auth-info attribute from the attribute data...
    */

    if (auth_info)
      ippDeleteAttribute(job->attrs, auth_info);
  }

  if ((attr = ippFindAttribute(job->attrs, "job-originating-host-name",
                               IPP_TAG_ZERO)) != NULL)
  {
   /*
    * Request contains a job-originating-host-name attribute; validate it...
    */

    if (attr->value_tag != IPP_TAG_NAME ||
        attr->num_values != 1 ||
        strcmp(con->http.hostname, "localhost"))
    {
     /*
      * Can't override the value if we aren't connected via localhost.
      * Also, we can only have 1 value and it must be a name value.
      */

      switch (attr->value_tag)
      {
        case IPP_TAG_STRING :
        case IPP_TAG_TEXTLANG :
        case IPP_TAG_NAMELANG :
        case IPP_TAG_TEXT :
        case IPP_TAG_NAME :
        case IPP_TAG_KEYWORD :
        case IPP_TAG_URI :
        case IPP_TAG_URISCHEME :
        case IPP_TAG_CHARSET :
        case IPP_TAG_LANGUAGE :
        case IPP_TAG_MIMETYPE :
           /*
            * Free old strings...
            */

            for (i = 0; i < attr->num_values; i ++)
            {
              _cupsStrFree(attr->values[i].string.text);
              attr->values[i].string.text = NULL;
              if (attr->values[i].string.language)
              {
                _cupsStrFree(attr->values[i].string.language);
                attr->values[i].string.language = NULL;
              }
            }

        default :
            break;
      }

     /*
      * Use the default connection hostname instead...
      */

      attr->value_tag             = IPP_TAG_NAME;
      attr->num_values            = 1;
      attr->values[0].string.text = _cupsStrAlloc(con->http.hostname);
    }

    attr->group_tag = IPP_TAG_JOB;
  }
  else
  {
   /*
    * No job-originating-host-name attribute, so use the hostname from
    * the connection...
    */

    ippAddString(job->attrs, IPP_TAG_JOB, IPP_TAG_NAME,
                 "job-originating-host-name", NULL, con->http.hostname);
  }

  ippAddInteger(job->attrs, IPP_TAG_JOB, IPP_TAG_INTEGER, "time-at-creation",
                time(NULL));
  attr = ippAddInteger(job->attrs, IPP_TAG_JOB, IPP_TAG_INTEGER,
                       "time-at-processing", 0);
  attr->value_tag = IPP_TAG_NOVALUE;
  attr = ippAddInteger(job->attrs, IPP_TAG_JOB, IPP_TAG_INTEGER,
                       "time-at-completed", 0);
  attr->value_tag = IPP_TAG_NOVALUE;

 /*
  * Add remaining job attributes...
  */

  ippAddInteger(job->attrs, IPP_TAG_JOB, IPP_TAG_INTEGER, "job-id", job->id);
  job->state = ippAddInteger(job->attrs, IPP_TAG_JOB, IPP_TAG_ENUM,
                             "job-state", IPP_JOB_STOPPED);
  job->state_value = (ipp_jstate_t)job->state->values[0].integer;
  job->reasons = ippAddString(job->attrs, IPP_TAG_JOB, IPP_TAG_KEYWORD,
                              "job-state-reasons", NULL, "job-incoming");
  job->sheets = ippAddInteger(job->attrs, IPP_TAG_JOB, IPP_TAG_INTEGER,
                              "job-media-sheets-completed", 0);
  ippAddString(job->attrs, IPP_TAG_JOB, IPP_TAG_URI, "job-printer-uri", NULL,
               printer->uri);

  if ((attr = ippFindAttribute(job->attrs, "job-k-octets",
                               IPP_TAG_INTEGER)) != NULL)
    attr->values[0].integer = 0;
  else
    ippAddInteger(job->attrs, IPP_TAG_JOB, IPP_TAG_INTEGER, "job-k-octets", 0);

  if ((attr = ippFindAttribute(job->attrs, "job-hold-until",
                               IPP_TAG_KEYWORD)) == NULL)
    attr = ippFindAttribute(job->attrs, "job-hold-until", IPP_TAG_NAME);
  if (!attr)
  {
    if ((val = cupsGetOption("job-hold-until", printer->num_options,
                             printer->options)) == NULL)
      val = "no-hold";

    attr = ippAddString(job->attrs, IPP_TAG_JOB, IPP_TAG_KEYWORD,
                        "job-hold-until", NULL, val);
  }
  if (attr && strcmp(attr->values[0].string.text, "no-hold"))
  {
   /*
    * Hold job until specified time...
    */

    cupsdSetJobHoldUntil(job, attr->values[0].string.text, 0);

    job->state->values[0].integer = IPP_JOB_HELD;
    job->state_value              = IPP_JOB_HELD;

    ippSetString(job->attrs, &job->reasons, 0, "job-hold-until-specified");
  }
  else if (job->attrs->request.op.operation_id == IPP_CREATE_JOB)
  {
    job->hold_until               = time(NULL) + MultipleOperationTimeout;
    job->state->values[0].integer = IPP_JOB_HELD;
    job->state_value              = IPP_JOB_HELD;
  }
  else
  {
    job->state->values[0].integer = IPP_JOB_PENDING;
    job->state_value              = IPP_JOB_PENDING;

    ippSetString(job->attrs, &job->reasons, 0, "none");
  }

  if (!(printer->type & CUPS_PRINTER_REMOTE) || Classification)
  {
   /*
    * Add job sheets options...
    */

    if ((attr = ippFindAttribute(job->attrs, "job-sheets",
                                 IPP_TAG_ZERO)) == NULL)
    {
      cupsdLogMessage(CUPSD_LOG_DEBUG,
                      "Adding default job-sheets values \"%s,%s\"...",
                      printer->job_sheets[0], printer->job_sheets[1]);

      attr = ippAddStrings(job->attrs, IPP_TAG_JOB, IPP_TAG_NAME, "job-sheets",
                           2, NULL, NULL);
      attr->values[0].string.text = _cupsStrRetain(printer->job_sheets[0]);
      attr->values[1].string.text = _cupsStrRetain(printer->job_sheets[1]);
    }

    job->job_sheets = attr;

   /*
    * Enforce classification level if set...
    */

    if (Classification)
    {
      cupsdLogMessage(CUPSD_LOG_INFO,
                      "Classification=\"%s\", ClassifyOverride=%d",
                      Classification ? Classification : "(null)",
                      ClassifyOverride);

      if (ClassifyOverride)
      {
        if (!strcmp(attr->values[0].string.text, "none") &&
            (attr->num_values == 1 ||
             !strcmp(attr->values[1].string.text, "none")))
        {
         /*
          * Force the leading banner to have the classification on it...
          */

          cupsdSetString(&attr->values[0].string.text, Classification);

          cupsdLogJob(job, CUPSD_LOG_NOTICE, "CLASSIFICATION FORCED "
                                             "job-sheets=\"%s,none\", "
                                             "job-originating-user-name=\"%s\"",
                      Classification, job->username);
        }
        else if (attr->num_values == 2 &&
                 strcmp(attr->values[0].string.text,
                        attr->values[1].string.text) &&
                 strcmp(attr->values[0].string.text, "none") &&
                 strcmp(attr->values[1].string.text, "none"))
        {
         /*
          * Can't put two different security markings on the same document!
          */

          cupsdSetString(&attr->values[1].string.text, attr->values[0].string.text);

          cupsdLogJob(job, CUPSD_LOG_NOTICE, "CLASSIFICATION FORCED "
                                             "job-sheets=\"%s,%s\", "
                                             "job-originating-user-name=\"%s\"",
                      attr->values[0].string.text,
                      attr->values[1].string.text, job->username);
        }
        else if (strcmp(attr->values[0].string.text, Classification) &&
                 strcmp(attr->values[0].string.text, "none") &&
                 (attr->num_values == 1 ||
                  (strcmp(attr->values[1].string.text, Classification) &&
                   strcmp(attr->values[1].string.text, "none"))))
        {
          if (attr->num_values == 1)
            cupsdLogJob(job, CUPSD_LOG_NOTICE,
                        "CLASSIFICATION OVERRIDDEN "
                        "job-sheets=\"%s\", "
                        "job-originating-user-name=\"%s\"",
                        attr->values[0].string.text, job->username);
          else
            cupsdLogJob(job, CUPSD_LOG_NOTICE,
                        "CLASSIFICATION OVERRIDDEN "
                        "job-sheets=\"%s,%s\",fffff "
                        "job-originating-user-name=\"%s\"",
                        attr->values[0].string.text,
                        attr->values[1].string.text, job->username);
        }
      }
      else if (strcmp(attr->values[0].string.text, Classification) &&
               (attr->num_values == 1 ||
               strcmp(attr->values[1].string.text, Classification)))
      {
       /*
        * Force the banner to have the classification on it...
        */

        if (attr->num_values > 1 &&
            !strcmp(attr->values[0].string.text, attr->values[1].string.text))
        {
          cupsdSetString(&(attr->values[0].string.text), Classification);
          cupsdSetString(&(attr->values[1].string.text), Classification);
        }
        else
        {
          if (attr->num_values == 1 ||
              strcmp(attr->values[0].string.text, "none"))
            cupsdSetString(&(attr->values[0].string.text), Classification);

          if (attr->num_values > 1 &&
              strcmp(attr->values[1].string.text, "none"))
            cupsdSetString(&(attr->values[1].string.text), Classification);
        }

        if (attr->num_values > 1)
          cupsdLogJob(job, CUPSD_LOG_NOTICE,
                      "CLASSIFICATION FORCED "
                      "job-sheets=\"%s,%s\", "
                      "job-originating-user-name=\"%s\"",
                      attr->values[0].string.text,
                      attr->values[1].string.text, job->username);
        else
          cupsdLogJob(job, CUPSD_LOG_NOTICE,
                      "CLASSIFICATION FORCED "
                      "job-sheets=\"%s\", "
                      "job-originating-user-name=\"%s\"",
                      Classification, job->username);
      }
    }

   /*
    * See if we need to add the starting sheet...
    */

    if (!(printer->type & CUPS_PRINTER_REMOTE))
    {
      cupsdLogJob(job, CUPSD_LOG_INFO, "Adding start banner page \"%s\".",
                  attr->values[0].string.text);

      if ((kbytes = copy_banner(con, job, attr->values[0].string.text)) < 0)
      {
        cupsdSetJobState(job, IPP_JOB_ABORTED, CUPSD_JOB_PURGE,
                         "Aborting job because the start banner could not be "
                         "copied.");
        return (NULL);
      }

      cupsdUpdateQuota(printer, job->username, 0, kbytes);
    }
  }
  else if ((attr = ippFindAttribute(job->attrs, "job-sheets",
                                    IPP_TAG_ZERO)) != NULL)
    job->job_sheets = attr;

 /*
  * Fill in the response info...
  */

  httpAssembleURIf(HTTP_URI_CODING_ALL, job_uri, sizeof(job_uri), "ipp", NULL,
                   con->servername, con->serverport, "/jobs/%d", job->id);
  ippAddString(con->response, IPP_TAG_JOB, IPP_TAG_URI, "job-uri", NULL,
               job_uri);

  ippAddInteger(con->response, IPP_TAG_JOB, IPP_TAG_INTEGER, "job-id", job->id);

  ippAddInteger(con->response, IPP_TAG_JOB, IPP_TAG_ENUM, "job-state",
                job->state_value);
  ippAddString(con->response, IPP_TAG_JOB, IPP_TAG_KEYWORD, "job-state-reasons",
               NULL, job->reasons->values[0].string.text);

  con->response->request.status.status_code = IPP_OK;

 /*
  * Add any job subscriptions...
  */

  add_job_subscriptions(con, job);

 /*
  * Set all but the first two attributes to the job attributes group...
  */

  for (attr = job->attrs->attrs->next->next; attr; attr = attr->next)
    attr->group_tag = IPP_TAG_JOB;

 /*
  * Fire the "job created" event...
  */

  cupsdAddEvent(CUPSD_EVENT_JOB_CREATED, printer, job, "Job created.");

 /*
  * Return the new job...
  */

  return (job);
}


/*
 * 'add_job_subscriptions()' - Add any subscriptions for a job.
 */

static void
add_job_subscriptions(
    cupsd_client_t *con,                /* I - Client connection */
    cupsd_job_t    *job)                /* I - Newly created job */
{
  int                   i;              /* Looping var */
  ipp_attribute_t       *prev,          /* Previous attribute */
                        *next,          /* Next attribute */
                        *attr;          /* Current attribute */
  cupsd_subscription_t  *sub;           /* Subscription object */
  const char            *recipient,     /* notify-recipient-uri */
                        *pullmethod;    /* notify-pull-method */
  ipp_attribute_t       *user_data;     /* notify-user-data */
  int                   interval;       /* notify-time-interval */
  unsigned              mask;           /* notify-events */


 /*
  * Find the first subscription group attribute; return if we have
  * none...
  */

  for (attr = job->attrs->attrs; attr; attr = attr->next)
    if (attr->group_tag == IPP_TAG_SUBSCRIPTION)
      break;

  if (!attr)
    return;

 /*
  * Process the subscription attributes in the request...
  */

  while (attr)
  {
    recipient = NULL;
    pullmethod = NULL;
    user_data  = NULL;
    interval   = 0;
    mask       = CUPSD_EVENT_NONE;

    while (attr && attr->group_tag != IPP_TAG_ZERO)
    {
      if (!strcmp(attr->name, "notify-recipient-uri") &&
          attr->value_tag == IPP_TAG_URI)
      {
       /*
        * Validate the recipient scheme against the ServerBin/notifier
        * directory...
        */

        char    notifier[1024],         /* Notifier filename */
                scheme[HTTP_MAX_URI],   /* Scheme portion of URI */
                userpass[HTTP_MAX_URI], /* Username portion of URI */
                host[HTTP_MAX_URI],     /* Host portion of URI */
                resource[HTTP_MAX_URI]; /* Resource portion of URI */
        int     port;                   /* Port portion of URI */


        recipient = attr->values[0].string.text;

        if (httpSeparateURI(HTTP_URI_CODING_ALL, recipient,
                            scheme, sizeof(scheme), userpass, sizeof(userpass),
                            host, sizeof(host), &port,
                            resource, sizeof(resource)) < HTTP_URI_OK)
        {
          send_ipp_status(con, IPP_NOT_POSSIBLE,
                          _("Bad notify-recipient-uri \"%s\"."), recipient);
          ippAddInteger(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_ENUM,
                        "notify-status-code", IPP_URI_SCHEME);
          return;
        }

        snprintf(notifier, sizeof(notifier), "%s/notifier/%s", ServerBin,
                 scheme);
        if (access(notifier, X_OK))
        {
          send_ipp_status(con, IPP_NOT_POSSIBLE,
                          _("notify-recipient-uri URI \"%s\" uses unknown "
                            "scheme."), recipient);
          ippAddInteger(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_ENUM,
                        "notify-status-code", IPP_URI_SCHEME);
          return;
        }

        if (!strcmp(scheme, "rss") && !check_rss_recipient(recipient))
        {
          send_ipp_status(con, IPP_NOT_POSSIBLE,
                          _("notify-recipient-uri URI \"%s\" is already used."),
                          recipient);
          ippAddInteger(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_ENUM,
                        "notify-status-code", IPP_ATTRIBUTES);
          return;
        }
      }
      else if (!strcmp(attr->name, "notify-pull-method") &&
               attr->value_tag == IPP_TAG_KEYWORD)
      {
        pullmethod = attr->values[0].string.text;

        if (strcmp(pullmethod, "ippget"))
        {
          send_ipp_status(con, IPP_NOT_POSSIBLE,
                          _("Bad notify-pull-method \"%s\"."), pullmethod);
          ippAddInteger(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_ENUM,
                        "notify-status-code", IPP_ATTRIBUTES);
          return;
        }
      }
      else if (!strcmp(attr->name, "notify-charset") &&
               attr->value_tag == IPP_TAG_CHARSET &&
               strcmp(attr->values[0].string.text, "us-ascii") &&
               strcmp(attr->values[0].string.text, "utf-8"))
      {
        send_ipp_status(con, IPP_CHARSET,
                        _("Character set \"%s\" not supported."),
                        attr->values[0].string.text);
        return;
      }
      else if (!strcmp(attr->name, "notify-natural-language") &&
               (attr->value_tag != IPP_TAG_LANGUAGE ||
                strcmp(attr->values[0].string.text, DefaultLanguage)))
      {
        send_ipp_status(con, IPP_CHARSET,
                        _("Language \"%s\" not supported."),
                        attr->values[0].string.text);
        return;
      }
      else if (!strcmp(attr->name, "notify-user-data") &&
               attr->value_tag == IPP_TAG_STRING)
      {
        if (attr->num_values > 1 || attr->values[0].unknown.length > 63)
        {
          send_ipp_status(con, IPP_REQUEST_VALUE,
                          _("The notify-user-data value is too large "
                            "(%d > 63 octets)."),
                          attr->values[0].unknown.length);
          return;
        }

        user_data = attr;
      }
      else if (!strcmp(attr->name, "notify-events") &&
               attr->value_tag == IPP_TAG_KEYWORD)
      {
        for (i = 0; i < attr->num_values; i ++)
          mask |= cupsdEventValue(attr->values[i].string.text);
      }
      else if (!strcmp(attr->name, "notify-lease-duration"))
      {
        send_ipp_status(con, IPP_BAD_REQUEST,
                        _("The notify-lease-duration attribute cannot be "
                          "used with job subscriptions."));
        return;
      }
      else if (!strcmp(attr->name, "notify-time-interval") &&
               attr->value_tag == IPP_TAG_INTEGER)
        interval = attr->values[0].integer;

      attr = attr->next;
    }

    if (!recipient && !pullmethod)
      break;

    if (mask == CUPSD_EVENT_NONE)
      mask = CUPSD_EVENT_JOB_COMPLETED;

    if ((sub = cupsdAddSubscription(mask, cupsdFindDest(job->dest), job,
                                    recipient, 0)) != NULL)
    {
      sub->interval = interval;

      cupsdSetString(&sub->owner, job->username);

      if (user_data)
      {
        sub->user_data_len = user_data->values[0].unknown.length;
        memcpy(sub->user_data, user_data->values[0].unknown.data,
               sub->user_data_len);
      }

      ippAddSeparator(con->response);
      ippAddInteger(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_INTEGER,
                    "notify-subscription-id", sub->id);

      cupsdLogMessage(CUPSD_LOG_DEBUG, "Added subscription %d for job %d",
                      sub->id, job->id);
    }

    if (attr)
      attr = attr->next;
  }

  cupsdMarkDirty(CUPSD_DIRTY_SUBSCRIPTIONS);

 /*
  * Remove all of the subscription attributes from the job request...
  *
  * TODO: Optimize this since subscription groups have to come at the
  * end of the request...
  */

  for (attr = job->attrs->attrs, prev = NULL; attr; attr = next)
  {
    next = attr->next;

    if (attr->group_tag == IPP_TAG_SUBSCRIPTION ||
        attr->group_tag == IPP_TAG_ZERO)
    {
     /*
      * Free and remove this attribute...
      */

      ippDeleteAttribute(NULL, attr);

      if (prev)
        prev->next = next;
      else
        job->attrs->attrs = next;
    }
    else
      prev = attr;
  }

  job->attrs->last    = prev;
  job->attrs->current = prev;
}


/*
 * 'add_job_uuid()' - Add job-uuid attribute to a job.
 *
 * See RFC 4122 for the definition of UUIDs and the format.
 */

static void
add_job_uuid(cupsd_job_t *job)          /* I - Job */
{
  char                  uuid[64];       /* job-uuid string */


 /*
  * Add a job-uuid attribute if none exists...
  */

  if (!ippFindAttribute(job->attrs, "job-uuid", IPP_TAG_URI))
    ippAddString(job->attrs, IPP_TAG_JOB, IPP_TAG_URI, "job-uuid", NULL,
                 _httpAssembleUUID(ServerName, RemotePort, job->dest, job->id,
                                   uuid, sizeof(uuid)));
}


/*
 * 'add_printer()' - Add a printer to the system.
 */

static void
add_printer(cupsd_client_t  *con,       /* I - Client connection */
            ipp_attribute_t *uri)       /* I - URI of printer */
{
  http_status_t status;                 /* Policy status */
  int           i;                      /* Looping var */
  char          scheme[HTTP_MAX_URI],   /* Method portion of URI */
                username[HTTP_MAX_URI], /* Username portion of URI */
                host[HTTP_MAX_URI],     /* Host portion of URI */
                resource[HTTP_MAX_URI]; /* Resource portion of URI */
  int           port;                   /* Port portion of URI */
  cupsd_printer_t *printer;             /* Printer/class */
  ipp_attribute_t *attr;                /* Printer attribute */
  cups_file_t   *fp;                    /* Script/PPD file */
  char          line[1024];             /* Line from file... */
  char          srcfile[1024],          /* Source Script/PPD file */
                dstfile[1024];          /* Destination Script/PPD file */
  int           modify;                 /* Non-zero if we are modifying */
  int           changed_driver,         /* Changed the PPD/interface script? */
                need_restart_job,       /* Need to restart job? */
                set_device_uri,         /* Did we set the device URI? */
                set_port_monitor;       /* Did we set the port monitor? */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "add_printer(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Do we have a valid URI?
  */

  httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text, scheme,
                  sizeof(scheme), username, sizeof(username), host,
                  sizeof(host), &port, resource, sizeof(resource));

  if (strncmp(resource, "/printers/", 10) || strlen(resource) == 10)
  {
   /*
    * No, return an error...
    */

    send_ipp_status(con, IPP_BAD_REQUEST,
                    _("The printer-uri must be of the form "
                      "\"ipp://HOSTNAME/printers/PRINTERNAME\"."));
    return;
  }

 /*
  * Do we have a valid printer name?
  */

  if (!validate_name(resource + 10))
  {
   /*
    * No, return an error...
    */

    send_ipp_status(con, IPP_BAD_REQUEST,
                    _("The printer-uri \"%s\" contains invalid characters."),
                    uri->values[0].string.text);
    return;
  }

 /*
  * See if the printer already exists; if not, create a new printer...
  */

  if ((printer = cupsdFindPrinter(resource + 10)) == NULL)
  {
   /*
    * Printer doesn't exist; see if we have a class of the same name...
    */

    if ((printer = cupsdFindClass(resource + 10)) != NULL)
    {
     /*
      * Yes, return an error...
      */

      send_ipp_status(con, IPP_NOT_POSSIBLE,
                      _("A class named \"%s\" already exists."),
                      resource + 10);
      return;
    }

   /*
    * No, check the default policy then add the printer...
    */

    if ((status = cupsdCheckPolicy(DefaultPolicyPtr, con, NULL)) != HTTP_OK)
    {
      send_http_error(con, status, NULL);
      return;
    }

    printer = cupsdAddPrinter(resource + 10);
    modify  = 0;
  }
  else if ((status = cupsdCheckPolicy(printer->op_policy_ptr, con,
                                      NULL)) != HTTP_OK)
  {
    send_http_error(con, status, printer);
    return;
  }
  else
    modify = 1;

 /*
  * Look for attributes and copy them over as needed...
  */

  changed_driver   = 0;
  need_restart_job = 0;

  if ((attr = ippFindAttribute(con->request, "printer-location",
                               IPP_TAG_TEXT)) != NULL)
    cupsdSetString(&printer->location, attr->values[0].string.text);

  if ((attr = ippFindAttribute(con->request, "printer-info",
                               IPP_TAG_TEXT)) != NULL)
    cupsdSetString(&printer->info, attr->values[0].string.text);

  set_device_uri = 0;

  if ((attr = ippFindAttribute(con->request, "device-uri",
                               IPP_TAG_URI)) != NULL)
  {
   /*
    * Do we have a valid device URI?
    */

    http_uri_status_t   uri_status;     /* URI separation status */
    char                old_device_uri[1024];
                                        /* Old device URI */


    need_restart_job = 1;

    uri_status = httpSeparateURI(HTTP_URI_CODING_ALL,
                                 attr->values[0].string.text,
                                 scheme, sizeof(scheme),
                                 username, sizeof(username),
                                 host, sizeof(host), &port,
                                 resource, sizeof(resource));

    if (uri_status < HTTP_URI_OK)
    {
      send_ipp_status(con, IPP_NOT_POSSIBLE, _("Bad device-uri \"%s\"."),
                      attr->values[0].string.text);
      cupsdLogMessage(CUPSD_LOG_DEBUG,
                      "add_printer: httpSeparateURI returned %d", uri_status);
      return;
    }

    if (!strcmp(scheme, "file"))
    {
     /*
      * See if the administrator has enabled file devices...
      */

      if (!FileDevice && strcmp(resource, "/dev/null"))
      {
       /*
        * File devices are disabled and the URL is not file:/dev/null...
        */

        send_ipp_status(con, IPP_NOT_POSSIBLE,
                        _("File device URIs have been disabled. "
                          "To enable, see the FileDevice directive in "
                          "\"%s/cupsd.conf\"."),
                        ServerRoot);
        return;
      }
    }
    else
    {
     /*
      * See if the backend exists and is executable...
      */

      snprintf(srcfile, sizeof(srcfile), "%s/backend/%s", ServerBin, scheme);
      if (access(srcfile, X_OK))
      {
       /*
        * Could not find device in list!
        */

        send_ipp_status(con, IPP_NOT_POSSIBLE,
                        _("Bad device-uri scheme \"%s\"."), scheme);
        return;
      }
    }

    if (printer->sanitized_device_uri)
      strlcpy(old_device_uri, printer->sanitized_device_uri,
              sizeof(old_device_uri));
    else
      old_device_uri[0] = '\0';

    cupsdSetDeviceURI(printer, attr->values[0].string.text);

    cupsdLogMessage(CUPSD_LOG_INFO,
                    "Setting %s device-uri to \"%s\" (was \"%s\".)",
                    printer->name, printer->sanitized_device_uri,
                    old_device_uri);

    set_device_uri = 1;
  }

  set_port_monitor = 0;

  if ((attr = ippFindAttribute(con->request, "port-monitor",
                               IPP_TAG_NAME)) != NULL)
  {
    ipp_attribute_t     *supported;     /* port-monitor-supported attribute */


    need_restart_job = 1;

    supported = ippFindAttribute(printer->ppd_attrs, "port-monitor-supported",
                                 IPP_TAG_NAME);
    if (supported)
    {
      for (i = 0; i < supported->num_values; i ++)
        if (!strcmp(supported->values[i].string.text,
                    attr->values[0].string.text))
          break;
    }

    if (!supported || i >= supported->num_values)
    {
      send_ipp_status(con, IPP_NOT_POSSIBLE, _("Bad port-monitor \"%s\"."),
                      attr->values[0].string.text);
      return;
    }

    cupsdLogMessage(CUPSD_LOG_INFO,
                    "Setting %s port-monitor to \"%s\" (was \"%s\".)",
                    printer->name, attr->values[0].string.text,
                    printer->port_monitor ? printer->port_monitor : "none");

    if (strcmp(attr->values[0].string.text, "none"))
      cupsdSetString(&printer->port_monitor, attr->values[0].string.text);
    else
      cupsdClearString(&printer->port_monitor);

    set_port_monitor = 1;
  }

  if ((attr = ippFindAttribute(con->request, "printer-is-accepting-jobs",
                               IPP_TAG_BOOLEAN)) != NULL &&
      attr->values[0].boolean != printer->accepting)
  {
    cupsdLogMessage(CUPSD_LOG_INFO,
                    "Setting %s printer-is-accepting-jobs to %d (was %d.)",
                    printer->name, attr->values[0].boolean, printer->accepting);

    printer->accepting = attr->values[0].boolean;

    cupsdAddEvent(CUPSD_EVENT_PRINTER_STATE, printer, NULL,
                  "%s accepting jobs.",
                  printer->accepting ? "Now" : "No longer");
  }

  if ((attr = ippFindAttribute(con->request, "printer-is-shared",
                               IPP_TAG_BOOLEAN)) != NULL)
  {
    if (attr->values[0].boolean &&
        printer->num_auth_info_required == 1 &&
        !strcmp(printer->auth_info_required[0], "negotiate"))
    {
      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Cannot share a remote Kerberized printer."));
      return;
    }

    if (printer->shared && !attr->values[0].boolean)
      cupsdDeregisterPrinter(printer, 1);

    cupsdLogMessage(CUPSD_LOG_INFO,
                    "Setting %s printer-is-shared to %d (was %d.)",
                    printer->name, attr->values[0].boolean, printer->shared);

    printer->shared = attr->values[0].boolean;
  }

  if ((attr = ippFindAttribute(con->request, "printer-state",
                               IPP_TAG_ENUM)) != NULL)
  {
    if (attr->values[0].integer != IPP_PRINTER_IDLE &&
        attr->values[0].integer != IPP_PRINTER_STOPPED)
    {
      send_ipp_status(con, IPP_BAD_REQUEST, _("Bad printer-state value %d."),
                      attr->values[0].integer);
      return;
    }

    cupsdLogMessage(CUPSD_LOG_INFO, "Setting %s printer-state to %d (was %d.)",
                    printer->name, attr->values[0].integer, printer->state);

    if (attr->values[0].integer == IPP_PRINTER_STOPPED)
      cupsdStopPrinter(printer, 0);
    else
    {
      need_restart_job = 1;
      cupsdSetPrinterState(printer, (ipp_pstate_t)(attr->values[0].integer), 0);
    }
  }

  if ((attr = ippFindAttribute(con->request, "printer-state-message",
                               IPP_TAG_TEXT)) != NULL)
  {
    strlcpy(printer->state_message, attr->values[0].string.text,
            sizeof(printer->state_message));

    cupsdAddEvent(CUPSD_EVENT_PRINTER_STATE, printer, NULL, "%s",
                  printer->state_message);
  }

  if ((attr = ippFindAttribute(con->request, "printer-state-reasons",
                               IPP_TAG_KEYWORD)) != NULL)
  {
    if (attr->num_values >
            (int)(sizeof(printer->reasons) / sizeof(printer->reasons[0])))
    {
      send_ipp_status(con, IPP_NOT_POSSIBLE,
                      _("Too many printer-state-reasons values (%d > %d)."),
                      attr->num_values,
                      (int)(sizeof(printer->reasons) /
                            sizeof(printer->reasons[0])));
      return;
    }

    for (i = 0; i < printer->num_reasons; i ++)
      _cupsStrFree(printer->reasons[i]);

    printer->num_reasons = 0;
    for (i = 0; i < attr->num_values; i ++)
    {
      if (!strcmp(attr->values[i].string.text, "none"))
        continue;

      printer->reasons[printer->num_reasons] =
          _cupsStrRetain(attr->values[i].string.text);
      printer->num_reasons ++;

      if (!strcmp(attr->values[i].string.text, "paused") &&
          printer->state != IPP_PRINTER_STOPPED)
      {
        cupsdLogMessage(CUPSD_LOG_INFO,
                        "Setting %s printer-state to %d (was %d.)",
                        printer->name, IPP_PRINTER_STOPPED, printer->state);
        cupsdStopPrinter(printer, 0);
      }
    }

    if (PrintcapFormat == PRINTCAP_PLIST)
      cupsdMarkDirty(CUPSD_DIRTY_PRINTCAP);

    cupsdAddEvent(CUPSD_EVENT_PRINTER_STATE, printer, NULL,
                  "Printer \"%s\" state changed.", printer->name);
  }

  set_printer_defaults(con, printer);

  if ((attr = ippFindAttribute(con->request, "auth-info-required",
                               IPP_TAG_KEYWORD)) != NULL)
    cupsdSetAuthInfoRequired(printer, NULL, attr);

 /*
  * See if we have all required attributes...
  */

  if (!printer->device_uri)
    cupsdSetString(&printer->device_uri, "file:///dev/null");

 /*
  * See if we have an interface script or PPD file attached to the request...
  */

  if (con->filename)
  {
    need_restart_job = 1;
    changed_driver   = 1;

    strlcpy(srcfile, con->filename, sizeof(srcfile));

    if ((fp = cupsFileOpen(srcfile, "rb")))
    {
     /*
      * Yes; get the first line from it...
      */

      line[0] = '\0';
      cupsFileGets(fp, line, sizeof(line));
      cupsFileClose(fp);

     /*
      * Then see what kind of file it is...
      */

      snprintf(dstfile, sizeof(dstfile), "%s/interfaces/%s", ServerRoot,
               printer->name);

      if (!strncmp(line, "*PPD-Adobe", 10))
      {
       /*
        * The new file is a PPD file, so remove any old interface script
        * that might be lying around...
        */

        unlink(dstfile);
      }
      else
      {
       /*
        * This must be an interface script, so move the file over to the
        * interfaces directory and make it executable...
        */

        if (copy_file(srcfile, dstfile))
        {
          send_ipp_status(con, IPP_INTERNAL_ERROR,
                          _("Unable to copy interface script - %s"),
                          strerror(errno));
          return;
        }

        cupsdLogMessage(CUPSD_LOG_DEBUG,
                        "Copied interface script successfully");
        chmod(dstfile, 0755);
      }

      snprintf(dstfile, sizeof(dstfile), "%s/ppd/%s.ppd", ServerRoot,
               printer->name);

      if (!strncmp(line, "*PPD-Adobe", 10))
      {
       /*
        * The new file is a PPD file, so move the file over to the
        * ppd directory and make it readable by all...
        */

        if (copy_file(srcfile, dstfile))
        {
          send_ipp_status(con, IPP_INTERNAL_ERROR,
                          _("Unable to copy PPD file - %s"),
                          strerror(errno));
          return;
        }

        cupsdLogMessage(CUPSD_LOG_DEBUG,
                        "Copied PPD file successfully");
        chmod(dstfile, 0644);
      }
      else
      {
       /*
        * This must be an interface script, so remove any old PPD file that
        * may be lying around...
        */

        unlink(dstfile);
      }
    }
  }
  else if ((attr = ippFindAttribute(con->request, "ppd-name",
                                    IPP_TAG_NAME)) != NULL)
  {
    need_restart_job = 1;
    changed_driver   = 1;

    if (!strcmp(attr->values[0].string.text, "raw"))
    {
     /*
      * Raw driver, remove any existing PPD or interface script files.
      */

      snprintf(dstfile, sizeof(dstfile), "%s/interfaces/%s", ServerRoot,
               printer->name);
      unlink(dstfile);

      snprintf(dstfile, sizeof(dstfile), "%s/ppd/%s.ppd", ServerRoot,
               printer->name);
      unlink(dstfile);
    }
    else
    {
     /*
      * PPD model file...
      */

      snprintf(dstfile, sizeof(dstfile), "%s/interfaces/%s", ServerRoot,
               printer->name);
      unlink(dstfile);

      snprintf(dstfile, sizeof(dstfile), "%s/ppd/%s.ppd", ServerRoot,
               printer->name);

      if (copy_model(con, attr->values[0].string.text, dstfile))
      {
        send_ipp_status(con, IPP_INTERNAL_ERROR, _("Unable to copy PPD file."));
        return;
      }

      cupsdLogMessage(CUPSD_LOG_DEBUG,
                      "Copied PPD file successfully");
      chmod(dstfile, 0644);
    }
  }

  if (changed_driver)
  {
   /*
    * If we changed the PPD/interface script, then remove the printer's cache
    * file and clear the printer-state-reasons...
    */

    char cache_name[1024];              /* Cache filename for printer attrs */

    snprintf(cache_name, sizeof(cache_name), "%s/%s.data", CacheDir,
             printer->name);
    unlink(cache_name);

    cupsdSetPrinterReasons(printer, "none");

   /*
    * (Re)register color profiles...
    */

    cupsdRegisterColor(printer);
  }

 /*
  * If we set the device URI but not the port monitor, check which port
  * monitor to use by default...
  */

  if (set_device_uri && !set_port_monitor)
  {
    ppd_file_t  *ppd;                   /* PPD file */
    ppd_attr_t  *ppdattr;               /* cupsPortMonitor attribute */


    httpSeparateURI(HTTP_URI_CODING_ALL, printer->device_uri, scheme,
                    sizeof(scheme), username, sizeof(username), host,
                    sizeof(host), &port, resource, sizeof(resource));

    snprintf(srcfile, sizeof(srcfile), "%s/ppd/%s.ppd", ServerRoot,
             printer->name);
    if ((ppd = _ppdOpenFile(srcfile, _PPD_LOCALIZATION_NONE)) != NULL)
    {
      for (ppdattr = ppdFindAttr(ppd, "cupsPortMonitor", NULL);
           ppdattr;
           ppdattr = ppdFindNextAttr(ppd, "cupsPortMonitor", NULL))
        if (!strcmp(scheme, ppdattr->spec))
        {
          cupsdLogMessage(CUPSD_LOG_INFO,
                          "Setting %s port-monitor to \"%s\" (was \"%s\".)",
                          printer->name, ppdattr->value,
                          printer->port_monitor ? printer->port_monitor
                                                : "none");

          if (strcmp(ppdattr->value, "none"))
            cupsdSetString(&printer->port_monitor, ppdattr->value);
          else
            cupsdClearString(&printer->port_monitor);

          break;
        }

      ppdClose(ppd);
    }
  }

 /*
  * Update the printer attributes and return...
  */

  cupsdSetPrinterAttrs(printer);
  cupsdMarkDirty(CUPSD_DIRTY_PRINTERS);

  if (need_restart_job && printer->job)
  {
   /*
    * Restart the current job...
    */

    cupsdSetJobState(printer->job, IPP_JOB_PENDING, CUPSD_JOB_FORCE,
                     "Job restarted because the printer was modified.");
  }

  cupsdMarkDirty(CUPSD_DIRTY_PRINTCAP);

  if (modify)
  {
    cupsdAddEvent(CUPSD_EVENT_PRINTER_MODIFIED,
                  printer, NULL, "Printer \"%s\" modified by \"%s\".",
                  printer->name, get_username(con));

    cupsdLogMessage(CUPSD_LOG_INFO, "Printer \"%s\" modified by \"%s\".",
                    printer->name, get_username(con));
  }
  else
  {
    cupsdAddEvent(CUPSD_EVENT_PRINTER_ADDED,
                  printer, NULL, "New printer \"%s\" added by \"%s\".",
                  printer->name, get_username(con));

    cupsdLogMessage(CUPSD_LOG_INFO, "New printer \"%s\" added by \"%s\".",
                    printer->name, get_username(con));
  }

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'add_printer_state_reasons()' - Add the "printer-state-reasons" attribute
 *                                 based upon the printer state...
 */

static void
add_printer_state_reasons(
    cupsd_client_t  *con,               /* I - Client connection */
    cupsd_printer_t *p)                 /* I - Printer info */
{
  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "add_printer_state_reasons(%p[%d], %p[%s])",
                  con, con->http.fd, p, p->name);

  if (p->num_reasons == 0)
    ippAddString(con->response, IPP_TAG_PRINTER, IPP_TAG_KEYWORD,
                 "printer-state-reasons", NULL, "none");
  else
    ippAddStrings(con->response, IPP_TAG_PRINTER, IPP_TAG_KEYWORD,
                  "printer-state-reasons", p->num_reasons, NULL,
                  (const char * const *)p->reasons);
}


/*
 * 'add_queued_job_count()' - Add the "queued-job-count" attribute for
 *                            the specified printer or class.
 */

static void
add_queued_job_count(
    cupsd_client_t  *con,               /* I - Client connection */
    cupsd_printer_t *p)                 /* I - Printer or class */
{
  int           count;                  /* Number of jobs on destination */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "add_queued_job_count(%p[%d], %p[%s])",
                  con, con->http.fd, p, p->name);

  count = cupsdGetPrinterJobCount(p->name);

  ippAddInteger(con->response, IPP_TAG_PRINTER, IPP_TAG_INTEGER,
                "queued-job-count", count);
}


/*
 * 'apply_printer_defaults()' - Apply printer default options to a job.
 */

static void
apply_printer_defaults(
    cupsd_printer_t *printer,           /* I - Printer */
    cupsd_job_t     *job)               /* I - Job */
{
  int           i,                      /* Looping var */
                num_options;            /* Number of default options */
  cups_option_t *options,               /* Default options */
                *option;                /* Current option */


 /*
  * Collect all of the default options and add the missing ones to the
  * job object...
  */

  for (i = printer->num_options, num_options = 0, options = NULL,
           option = printer->options;
       i > 0;
       i --, option ++)
    if (!ippFindAttribute(job->attrs, option->name, IPP_TAG_ZERO))
    {
      num_options = cupsAddOption(option->name, option->value, num_options,
                                  &options);
    }

 /*
  * Encode these options as attributes in the job object...
  */

  cupsEncodeOptions2(job->attrs, num_options, options, IPP_TAG_JOB);
  cupsFreeOptions(num_options, options);
}


/*
 * 'authenticate_job()' - Set job authentication info.
 */

static void
authenticate_job(cupsd_client_t  *con,  /* I - Client connection */
                 ipp_attribute_t *uri)  /* I - Job URI */
{
  ipp_attribute_t       *attr,          /* job-id attribute */
                        *auth_info;     /* auth-info attribute */
  int                   jobid;          /* Job ID */
  cupsd_job_t           *job;           /* Current job */
  char                  scheme[HTTP_MAX_URI],
                                        /* Method portion of URI */
                        username[HTTP_MAX_URI],
                                        /* Username portion of URI */
                        host[HTTP_MAX_URI],
                                        /* Host portion of URI */
                        resource[HTTP_MAX_URI];
                                        /* Resource portion of URI */
  int                   port;           /* Port portion of URI */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "authenticate_job(%p[%d], %s)",
                  con, con->http.fd, uri->values[0].string.text);

 /*
  * Start with "everything is OK" status...
  */

  con->response->request.status.status_code = IPP_OK;

 /*
  * See if we have a job URI or a printer URI...
  */

  if (!strcmp(uri->name, "printer-uri"))
  {
   /*
    * Got a printer URI; see if we also have a job-id attribute...
    */

    if ((attr = ippFindAttribute(con->request, "job-id",
                                 IPP_TAG_INTEGER)) == NULL)
    {
      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Got a printer-uri attribute but no job-id."));
      return;
    }

    jobid = attr->values[0].integer;
  }
  else
  {
   /*
    * Got a job URI; parse it to get the job ID...
    */

    httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text, scheme,
                    sizeof(scheme), username, sizeof(username), host,
                    sizeof(host), &port, resource, sizeof(resource));

    if (strncmp(resource, "/jobs/", 6))
    {
     /*
      * Not a valid URI!
      */

      send_ipp_status(con, IPP_BAD_REQUEST, _("Bad job-uri \"%s\"."),
                      uri->values[0].string.text);
      return;
    }

    jobid = atoi(resource + 6);
  }

 /*
  * See if the job exists...
  */

  if ((job = cupsdFindJob(jobid)) == NULL)
  {
   /*
    * Nope - return a "not found" error...
    */

    send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."), jobid);
    return;
  }

 /*
  * See if the job has been completed...
  */

  if (job->state_value != IPP_JOB_HELD)
  {
   /*
    * Return a "not-possible" error...
    */

    send_ipp_status(con, IPP_NOT_POSSIBLE,
                    _("Job #%d is not held for authentication."),
                    jobid);
    return;
  }

 /*
  * See if we have already authenticated...
  */

  auth_info = ippFindAttribute(con->request, "auth-info", IPP_TAG_TEXT);

  if (!con->username[0] && !auth_info)
  {
    cupsd_printer_t     *printer;       /* Job destination */

   /*
    * No auth data.  If we need to authenticate via Kerberos, send a
    * HTTP auth challenge, otherwise just return an IPP error...
    */

    printer = cupsdFindDest(job->dest);

    if (printer && printer->num_auth_info_required > 0 &&
        !strcmp(printer->auth_info_required[0], "negotiate"))
      send_http_error(con, HTTP_UNAUTHORIZED, printer);
    else
      send_ipp_status(con, IPP_NOT_AUTHORIZED,
                      _("No authentication information provided."));
    return;
  }

 /*
  * See if the job is owned by the requesting user...
  */

  if (!validate_user(job, con, job->username, username, sizeof(username)))
  {
    send_http_error(con, con->username[0] ? HTTP_FORBIDDEN : HTTP_UNAUTHORIZED,
                    cupsdFindDest(job->dest));
    return;
  }

 /*
  * Save the authentication information for this job...
  */

  save_auth_info(con, job, auth_info);

 /*
  * Reset the job-hold-until value to "no-hold"...
  */

  if ((attr = ippFindAttribute(job->attrs, "job-hold-until",
                               IPP_TAG_KEYWORD)) == NULL)
    attr = ippFindAttribute(job->attrs, "job-hold-until", IPP_TAG_NAME);

  if (attr)
  {
    attr->value_tag = IPP_TAG_KEYWORD;
    cupsdSetString(&(attr->values[0].string.text), "no-hold");
  }

 /*
  * Release the job and return...
  */

  cupsdReleaseJob(job);

  cupsdAddEvent(CUPSD_EVENT_JOB_STATE, NULL, job, "Job authenticated by user");

  cupsdLogJob(job, CUPSD_LOG_INFO, "Authenticated by \"%s\".", con->username);

  cupsdCheckJobs();
}


/*
 * 'cancel_all_jobs()' - Cancel all or selected print jobs.
 */

static void
cancel_all_jobs(cupsd_client_t  *con,   /* I - Client connection */
                ipp_attribute_t *uri)   /* I - Job or Printer URI */
{
  int           i;                      /* Looping var */
  http_status_t status;                 /* Policy status */
  cups_ptype_t  dtype;                  /* Destination type */
  char          scheme[HTTP_MAX_URI],   /* Scheme portion of URI */
                userpass[HTTP_MAX_URI], /* Username portion of URI */
                hostname[HTTP_MAX_URI], /* Host portion of URI */
                resource[HTTP_MAX_URI]; /* Resource portion of URI */
  int           port;                   /* Port portion of URI */
  ipp_attribute_t *attr;                /* Attribute in request */
  const char    *username = NULL;       /* Username */
  cupsd_jobaction_t purge = CUPSD_JOB_DEFAULT;
                                        /* Purge? */
  cupsd_printer_t *printer;             /* Printer */
  ipp_attribute_t *job_ids;             /* job-ids attribute */
  cupsd_job_t   *job;                   /* Job */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "cancel_all_jobs(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Get the jobs to cancel/purge...
  */

  switch (con->request->request.op.operation_id)
  {
    case IPP_PURGE_JOBS :
       /*
        * Get the username (if any) for the jobs we want to cancel (only if
        * "my-jobs" is specified...
        */

        if ((attr = ippFindAttribute(con->request, "my-jobs",
                                     IPP_TAG_BOOLEAN)) != NULL &&
            attr->values[0].boolean)
        {
          if ((attr = ippFindAttribute(con->request, "requesting-user-name",
                                       IPP_TAG_NAME)) != NULL)
            username = attr->values[0].string.text;
          else
          {
            send_ipp_status(con, IPP_BAD_REQUEST,
                            _("Missing requesting-user-name attribute."));
            return;
          }
        }

       /*
        * Look for the "purge-jobs" attribute...
        */

        if ((attr = ippFindAttribute(con->request, "purge-jobs",
                                     IPP_TAG_BOOLEAN)) != NULL)
          purge = attr->values[0].boolean ? CUPSD_JOB_PURGE : CUPSD_JOB_DEFAULT;
        else
          purge = CUPSD_JOB_PURGE;
        break;

    case IPP_CANCEL_MY_JOBS :
        if (con->username[0])
          username = con->username;
        else if ((attr = ippFindAttribute(con->request, "requesting-user-name",
                                          IPP_TAG_NAME)) != NULL)
          username = attr->values[0].string.text;
        else
        {
          send_ipp_status(con, IPP_BAD_REQUEST,
                          _("Missing requesting-user-name attribute."));
          return;
        }

    default :
        break;
  }

  job_ids = ippFindAttribute(con->request, "job-ids", IPP_TAG_INTEGER);

 /*
  * See if we have a printer URI...
  */

  if (strcmp(uri->name, "printer-uri"))
  {
    send_ipp_status(con, IPP_BAD_REQUEST,
                    _("The printer-uri attribute is required."));
    return;
  }

 /*
  * And if the destination is valid...
  */

  if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
  {
   /*
    * Bad URI?
    */

    httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text,
                    scheme, sizeof(scheme), userpass, sizeof(userpass),
                    hostname, sizeof(hostname), &port,
                    resource, sizeof(resource));

    if ((!strncmp(resource, "/printers/", 10) && resource[10]) ||
        (!strncmp(resource, "/classes/", 9) && resource[9]))
    {
      send_ipp_status(con, IPP_NOT_FOUND,
                      _("The printer or class does not exist."));
      return;
    }

   /*
    * Check policy...
    */

    if ((status = cupsdCheckPolicy(DefaultPolicyPtr, con, NULL)) != HTTP_OK)
    {
      send_http_error(con, status, NULL);
      return;
    }

    if (job_ids)
    {
      for (i = 0; i < job_ids->num_values; i ++)
      {
        if (!cupsdFindJob(job_ids->values[i].integer))
          break;
      }

      if (i < job_ids->num_values)
      {
        send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."),
                        job_ids->values[i].integer);
        return;
      }

      for (i = 0; i < job_ids->num_values; i ++)
      {
        job = cupsdFindJob(job_ids->values[i].integer);

        cupsdSetJobState(job, IPP_JOB_CANCELED, purge,
                         purge == CUPSD_JOB_PURGE ? "Job purged by user." :
                                                    "Job canceled by user.");
      }

      cupsdLogMessage(CUPSD_LOG_INFO, "Selected jobs were %s by \"%s\".",
                      purge == CUPSD_JOB_PURGE ? "purged" : "canceled",
                      get_username(con));
    }
    else
    {
     /*
      * Cancel all jobs on all printers...
      */

      cupsdCancelJobs(NULL, username, purge);

      cupsdLogMessage(CUPSD_LOG_INFO, "All jobs were %s by \"%s\".",
                      purge == CUPSD_JOB_PURGE ? "purged" : "canceled",
                      get_username(con));
    }
  }
  else
  {
   /*
    * Check policy...
    */

    if ((status = cupsdCheckPolicy(printer->op_policy_ptr, con,
                                   NULL)) != HTTP_OK)
    {
      send_http_error(con, status, printer);
      return;
    }

    if (job_ids)
    {
      for (i = 0; i < job_ids->num_values; i ++)
      {
        if ((job = cupsdFindJob(job_ids->values[i].integer)) == NULL ||
            _cups_strcasecmp(job->dest, printer->name))
          break;
      }

      if (i < job_ids->num_values)
      {
        send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."),
                        job_ids->values[i].integer);
        return;
      }

      for (i = 0; i < job_ids->num_values; i ++)
      {
        job = cupsdFindJob(job_ids->values[i].integer);

        cupsdSetJobState(job, IPP_JOB_CANCELED, purge,
                         purge == CUPSD_JOB_PURGE ? "Job purged by user." :
                                                    "Job canceled by user.");
      }

      cupsdLogMessage(CUPSD_LOG_INFO, "Selected jobs were %s by \"%s\".",
                      purge == CUPSD_JOB_PURGE ? "purged" : "canceled",
                      get_username(con));
    }
    else
    {
     /*
      * Cancel all of the jobs on the named printer...
      */

      cupsdCancelJobs(printer->name, username, purge);

      cupsdLogMessage(CUPSD_LOG_INFO, "All jobs on \"%s\" were %s by \"%s\".",
                      printer->name,
                      purge == CUPSD_JOB_PURGE ? "purged" : "canceled",
                      get_username(con));
    }
  }

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'cancel_job()' - Cancel a print job.
 */

static void
cancel_job(cupsd_client_t  *con,        /* I - Client connection */
           ipp_attribute_t *uri)        /* I - Job or Printer URI */
{
  ipp_attribute_t *attr;                /* Current attribute */
  int           jobid;                  /* Job ID */
  char          scheme[HTTP_MAX_URI],   /* Scheme portion of URI */
                username[HTTP_MAX_URI], /* Username portion of URI */
                host[HTTP_MAX_URI],     /* Host portion of URI */
                resource[HTTP_MAX_URI]; /* Resource portion of URI */
  int           port;                   /* Port portion of URI */
  cupsd_job_t   *job;                   /* Job information */
  cups_ptype_t  dtype;                  /* Destination type (printer/class) */
  cupsd_printer_t *printer;             /* Printer data */
  cupsd_jobaction_t purge;              /* Purge the job? */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "cancel_job(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * See if we have a job URI or a printer URI...
  */

  if (!strcmp(uri->name, "printer-uri"))
  {
   /*
    * Got a printer URI; see if we also have a job-id attribute...
    */

    if ((attr = ippFindAttribute(con->request, "job-id",
                                 IPP_TAG_INTEGER)) == NULL)
    {
      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Got a printer-uri attribute but no job-id."));
      return;
    }

    if ((jobid = attr->values[0].integer) == 0)
    {
     /*
      * Find the current job on the specified printer...
      */

      if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
      {
       /*
        * Bad URI...
        */

        send_ipp_status(con, IPP_NOT_FOUND,
                        _("The printer or class does not exist."));
        return;
      }

     /*
      * See if there are any pending jobs...
      */

      for (job = (cupsd_job_t *)cupsArrayFirst(ActiveJobs);
           job;
           job = (cupsd_job_t *)cupsArrayNext(ActiveJobs))
        if (job->state_value <= IPP_JOB_PROCESSING &&
            !_cups_strcasecmp(job->dest, printer->name))
          break;

      if (job)
        jobid = job->id;
      else
      {
       /*
        * No, try stopped jobs...
        */

        for (job = (cupsd_job_t *)cupsArrayFirst(ActiveJobs);
             job;
             job = (cupsd_job_t *)cupsArrayNext(ActiveJobs))
          if (job->state_value == IPP_JOB_STOPPED &&
              !_cups_strcasecmp(job->dest, printer->name))
            break;

        if (job)
          jobid = job->id;
        else
        {
          send_ipp_status(con, IPP_NOT_POSSIBLE, _("No active jobs on %s."),
                          printer->name);
          return;
        }
      }
    }
  }
  else
  {
   /*
    * Got a job URI; parse it to get the job ID...
    */

    httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text, scheme,
                    sizeof(scheme), username, sizeof(username), host,
                    sizeof(host), &port, resource, sizeof(resource));

    if (strncmp(resource, "/jobs/", 6))
    {
     /*
      * Not a valid URI!
      */

      send_ipp_status(con, IPP_BAD_REQUEST, _("Bad job-uri \"%s\"."),
                      uri->values[0].string.text);
      return;
    }

    jobid = atoi(resource + 6);
  }

 /*
  * Look for the "purge-job" attribute...
  */

  if ((attr = ippFindAttribute(con->request, "purge-job",
                               IPP_TAG_BOOLEAN)) != NULL)
    purge = attr->values[0].boolean ? CUPSD_JOB_PURGE : CUPSD_JOB_DEFAULT;
  else
    purge = CUPSD_JOB_DEFAULT;

 /*
  * See if the job exists...
  */

  if ((job = cupsdFindJob(jobid)) == NULL)
  {
   /*
    * Nope - return a "not found" error...
    */

    send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."), jobid);
    return;
  }

 /*
  * See if the job is owned by the requesting user...
  */

  if (!validate_user(job, con, job->username, username, sizeof(username)))
  {
    send_http_error(con, con->username[0] ? HTTP_FORBIDDEN : HTTP_UNAUTHORIZED,
                    cupsdFindDest(job->dest));
    return;
  }

 /*
  * See if the job is already completed, canceled, or aborted; if so,
  * we can't cancel...
  */

  if (job->state_value >= IPP_JOB_CANCELED && purge != CUPSD_JOB_PURGE)
  {
    switch (job->state_value)
    {
      case IPP_JOB_CANCELED :
          send_ipp_status(con, IPP_NOT_POSSIBLE,
                          _("Job #%d is already canceled - can\'t cancel."),
                          jobid);
          break;

      case IPP_JOB_ABORTED :
          send_ipp_status(con, IPP_NOT_POSSIBLE,
                          _("Job #%d is already aborted - can\'t cancel."),
                          jobid);
          break;

      default :
          send_ipp_status(con, IPP_NOT_POSSIBLE,
                          _("Job #%d is already completed - can\'t cancel."),
                          jobid);
          break;
    }

    return;
  }

 /*
  * Cancel the job and return...
  */

  cupsdSetJobState(job, IPP_JOB_CANCELED, purge,
                   purge == CUPSD_JOB_PURGE ? "Job purged by \"%s\"" :
                                              "Job canceled by \"%s\"",
                   username);
  cupsdCheckJobs();

  if (purge == CUPSD_JOB_PURGE)
    cupsdLogMessage(CUPSD_LOG_INFO, "[Job %d] Purged by \"%s\".", jobid,
                    username);
  else
    cupsdLogMessage(CUPSD_LOG_INFO, "[Job %d] Canceled by \"%s\".", jobid,
                    username);

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'cancel_subscription()' - Cancel a subscription.
 */

static void
cancel_subscription(
    cupsd_client_t *con,                /* I - Client connection */
    int            sub_id)              /* I - Subscription ID */
{
  http_status_t         status;         /* Policy status */
  cupsd_subscription_t  *sub;           /* Subscription */


  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "cancel_subscription(con=%p[%d], sub_id=%d)",
                  con, con->http.fd, sub_id);

 /*
  * Is the subscription ID valid?
  */

  if ((sub = cupsdFindSubscription(sub_id)) == NULL)
  {
   /*
    * Bad subscription ID...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("Subscription #%d does not exist."), sub_id);
    return;
  }

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(sub->dest ? sub->dest->op_policy_ptr :
                                             DefaultPolicyPtr,
                                 con, sub->owner)) != HTTP_OK)
  {
    send_http_error(con, status, sub->dest);
    return;
  }

 /*
  * Cancel the subscription...
  */

  cupsdDeleteSubscription(sub, 1);

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'check_rss_recipient()' - Check that we do not have a duplicate RSS feed URI.
 */

static int                              /* O - 1 if OK, 0 if not */
check_rss_recipient(
    const char *recipient)              /* I - Recipient URI */
{
  cupsd_subscription_t  *sub;           /* Current subscription */


  for (sub = (cupsd_subscription_t *)cupsArrayFirst(Subscriptions);
       sub;
       sub = (cupsd_subscription_t *)cupsArrayNext(Subscriptions))
    if (sub->recipient)
    {
     /*
      * Compare the URIs up to the first ?...
      */

      const char *r1, *r2;

      for (r1 = recipient, r2 = sub->recipient;
           *r1 == *r2 && *r1 && *r1 != '?' && *r2 && *r2 != '?';
           r1 ++, r2 ++);

      if (*r1 == *r2)
        return (0);
    }

  return (1);
}


/*
 * 'check_quotas()' - Check quotas for a printer and user.
 */

static int                              /* O - 1 if OK, 0 if forbidden,
                                               -1 if limit reached */
check_quotas(cupsd_client_t  *con,      /* I - Client connection */
             cupsd_printer_t *p)        /* I - Printer or class */
{
  char          username[33],           /* Username */
                *name;                  /* Current user name */
  cupsd_quota_t *q;                     /* Quota data */
#ifdef HAVE_MBR_UID_TO_UUID
 /*
  * Use Apple membership APIs which require that all names represent
  * valid user account or group records accessible by the server.
  */

  uuid_t        usr_uuid;               /* UUID for job requesting user  */
  uuid_t        usr2_uuid;              /* UUID for ACL user name entry  */
  uuid_t        grp_uuid;               /* UUID for ACL group name entry */
  int           mbr_err;                /* Error from membership function */
  int           is_member;              /* Is this user a member? */
#else
 /*
  * Use standard POSIX APIs for checking users and groups...
  */

  struct passwd *pw;                    /* User password data */
#endif /* HAVE_MBR_UID_TO_UUID */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "check_quotas(%p[%d], %p[%s])",
                  con, con->http.fd, p, p->name);

 /*
  * Figure out who is printing...
  */

  strlcpy(username, get_username(con), sizeof(username));

  if ((name = strchr(username, '@')) != NULL)
    *name = '\0';                       /* Strip @REALM */

 /*
  * Check global active job limits for printers and users...
  */

  if (MaxJobsPerPrinter)
  {
   /*
    * Check if there are too many pending jobs on this printer...
    */

    if (cupsdGetPrinterJobCount(p->name) >= MaxJobsPerPrinter)
    {
      cupsdLogMessage(CUPSD_LOG_INFO, "Too many jobs for printer \"%s\"...",
                      p->name);
      return (-1);
    }
  }

  if (MaxJobsPerUser)
  {
   /*
    * Check if there are too many pending jobs for this user...
    */

    if (cupsdGetUserJobCount(username) >= MaxJobsPerUser)
    {
      cupsdLogMessage(CUPSD_LOG_INFO, "Too many jobs for user \"%s\"...",
                      username);
      return (-1);
    }
  }

 /*
  * Check against users...
  */

  if (cupsArrayCount(p->users) == 0 && p->k_limit == 0 && p->page_limit == 0)
    return (1);

  if (cupsArrayCount(p->users))
  {
#ifdef HAVE_MBR_UID_TO_UUID
   /*
    * Get UUID for job requesting user...
    */

    if (mbr_user_name_to_uuid((char *)username, usr_uuid))
    {
     /*
      * Unknown user...
      */

      cupsdLogMessage(CUPSD_LOG_DEBUG,
                      "check_quotas: UUID lookup failed for user \"%s\"",
                      username);
      cupsdLogMessage(CUPSD_LOG_INFO,
                      "Denying user \"%s\" access to printer \"%s\" "
                      "(unknown user)...",
                      username, p->name);
      return (0);
    }
#else
   /*
    * Get UID and GID of requesting user...
    */

    pw = getpwnam(username);
    endpwent();
#endif /* HAVE_MBR_UID_TO_UUID */

    for (name = (char *)cupsArrayFirst(p->users);
         name;
         name = (char *)cupsArrayNext(p->users))
      if (name[0] == '@')
      {
       /*
        * Check group membership...
        */

#ifdef HAVE_MBR_UID_TO_UUID
        if (name[1] == '#')
        {
          if (uuid_parse(name + 2, grp_uuid))
            uuid_clear(grp_uuid);
        }
        else if ((mbr_err = mbr_group_name_to_uuid(name + 1, grp_uuid)) != 0)
        {
         /*
          * Invalid ACL entries are ignored for matching; just record a
          * warning in the log...
          */

          cupsdLogMessage(CUPSD_LOG_DEBUG,
                          "check_quotas: UUID lookup failed for ACL entry "
                          "\"%s\" (err=%d)", name, mbr_err);
          cupsdLogMessage(CUPSD_LOG_WARN,
                          "Access control entry \"%s\" not a valid group name; "
                          "entry ignored", name);
        }

        if ((mbr_err = mbr_check_membership(usr_uuid, grp_uuid,
                                            &is_member)) != 0)
        {
         /*
          * At this point, there should be no errors, but check anyways...
          */

          cupsdLogMessage(CUPSD_LOG_DEBUG,
                          "check_quotas: group \"%s\" membership check "
                          "failed (err=%d)", name + 1, mbr_err);
          is_member = 0;
        }

       /*
        * Stop if we found a match...
        */

        if (is_member)
          break;

#else
        if (cupsdCheckGroup(username, pw, name + 1))
          break;
#endif /* HAVE_MBR_UID_TO_UUID */
      }
#ifdef HAVE_MBR_UID_TO_UUID
      else
      {
        if (name[0] == '#')
        {
          if (uuid_parse(name + 1, usr2_uuid))
            uuid_clear(usr2_uuid);
        }
        else if ((mbr_err = mbr_user_name_to_uuid(name, usr2_uuid)) != 0)
        {
         /*
          * Invalid ACL entries are ignored for matching; just record a
          * warning in the log...
          */

          cupsdLogMessage(CUPSD_LOG_DEBUG,
                          "check_quotas: UUID lookup failed for ACL entry "
                          "\"%s\" (err=%d)", name, mbr_err);
          cupsdLogMessage(CUPSD_LOG_WARN,
                          "Access control entry \"%s\" not a valid user name; "
                          "entry ignored", name);
        }

        if (!uuid_compare(usr_uuid, usr2_uuid))
          break;
      }
#else
      else if (!_cups_strcasecmp(username, name))
        break;
#endif /* HAVE_MBR_UID_TO_UUID */

    if ((name != NULL) == p->deny_users)
    {
      cupsdLogMessage(CUPSD_LOG_INFO,
                      "Denying user \"%s\" access to printer \"%s\"...",
                      username, p->name);
      return (0);
    }
  }

 /*
  * Check quotas...
  */

  if (p->k_limit || p->page_limit)
  {
    if ((q = cupsdUpdateQuota(p, username, 0, 0)) == NULL)
    {
      cupsdLogMessage(CUPSD_LOG_ERROR,
                      "Unable to allocate quota data for user \"%s\"",
                      username);
      return (-1);
    }

    if ((q->k_count >= p->k_limit && p->k_limit) ||
        (q->page_count >= p->page_limit && p->page_limit))
    {
      cupsdLogMessage(CUPSD_LOG_INFO, "User \"%s\" is over the quota limit...",
                      username);
      return (-1);
    }
  }

 /*
  * If we have gotten this far, we're done!
  */

  return (1);
}


/*
 * 'close_job()' - Close a multi-file job.
 */

static void
close_job(cupsd_client_t  *con,         /* I - Client connection */
          ipp_attribute_t *uri)         /* I - Printer URI */
{
  cupsd_job_t           *job;           /* Job */
  ipp_attribute_t       *attr;          /* Attribute */
  char                  job_uri[HTTP_MAX_URI],
                                        /* Job URI */
                        username[256];  /* User name */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "close_job(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * See if we have a job URI or a printer URI...
  */

  if (strcmp(uri->name, "printer-uri"))
  {
   /*
    * job-uri is not supported by Close-Job!
    */

    send_ipp_status(con, IPP_BAD_REQUEST,
                    _("Close-Job doesn't support the job-uri attribute."));
    return;
  }

 /*
  * Got a printer URI; see if we also have a job-id attribute...
  */

  if ((attr = ippFindAttribute(con->request, "job-id",
                               IPP_TAG_INTEGER)) == NULL)
  {
    send_ipp_status(con, IPP_BAD_REQUEST,
                    _("Got a printer-uri attribute but no job-id."));
    return;
  }

  if ((job = cupsdFindJob(attr->values[0].integer)) == NULL)
  {
   /*
    * Nope - return a "not found" error...
    */

    send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."),
                    attr->values[0].integer);
    return;
  }

 /*
  * See if the job is owned by the requesting user...
  */

  if (!validate_user(job, con, job->username, username, sizeof(username)))
  {
    send_http_error(con, con->username[0] ? HTTP_FORBIDDEN : HTTP_UNAUTHORIZED,
                    cupsdFindDest(job->dest));
    return;
  }

 /*
  * Add any ending sheet...
  */

  if (cupsdTimeoutJob(job))
    return;

  if (job->state_value == IPP_JOB_STOPPED)
  {
    job->state->values[0].integer = IPP_JOB_PENDING;
    job->state_value              = IPP_JOB_PENDING;
  }
  else if (job->state_value == IPP_JOB_HELD)
  {
    if ((attr = ippFindAttribute(job->attrs, "job-hold-until",
                                 IPP_TAG_KEYWORD)) == NULL)
      attr = ippFindAttribute(job->attrs, "job-hold-until", IPP_TAG_NAME);

    if (!attr || !strcmp(attr->values[0].string.text, "no-hold"))
    {
      job->state->values[0].integer = IPP_JOB_PENDING;
      job->state_value              = IPP_JOB_PENDING;
    }
  }

  job->dirty = 1;
  cupsdMarkDirty(CUPSD_DIRTY_JOBS);

 /*
  * Fill in the response info...
  */

  httpAssembleURIf(HTTP_URI_CODING_ALL, job_uri, sizeof(job_uri), "ipp", NULL,
                   con->servername, con->serverport, "/jobs/%d", job->id);
  ippAddString(con->response, IPP_TAG_JOB, IPP_TAG_URI, "job-uri", NULL,
               job_uri);

  ippAddInteger(con->response, IPP_TAG_JOB, IPP_TAG_INTEGER, "job-id", job->id);

  ippAddInteger(con->response, IPP_TAG_JOB, IPP_TAG_ENUM, "job-state",
                job->state_value);

  con->response->request.status.status_code = IPP_OK;

 /*
  * Start the job if necessary...
  */

  cupsdCheckJobs();
}


/*
 * 'copy_attrs()' - Copy attributes from one request to another.
 */

static void
copy_attrs(ipp_t        *to,            /* I - Destination request */
           ipp_t        *from,          /* I - Source request */
           cups_array_t *ra,            /* I - Requested attributes */
           ipp_tag_t    group,          /* I - Group to copy */
           int          quickcopy,      /* I - Do a quick copy? */
           cups_array_t *exclude)       /* I - Attributes to exclude? */
{
  ipp_attribute_t       *fromattr;      /* Source attribute */


  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "copy_attrs(to=%p, from=%p, ra=%p, group=%x, quickcopy=%d)",
                  to, from, ra, group, quickcopy);

  if (!to || !from)
    return;

  for (fromattr = from->attrs; fromattr; fromattr = fromattr->next)
  {
   /*
    * Filter attributes as needed...
    */

    if ((group != IPP_TAG_ZERO && fromattr->group_tag != group &&
         fromattr->group_tag != IPP_TAG_ZERO) || !fromattr->name)
      continue;

    if (!strcmp(fromattr->name, "job-printer-uri"))
      continue;

    if (exclude &&
        (cupsArrayFind(exclude, fromattr->name) ||
         cupsArrayFind(exclude, "all")))
    {
     /*
      * We need to exclude this attribute for security reasons; we require the
      * job-id attribute regardless of the security settings for IPP
      * conformance.
      *
      * The job-printer-uri attribute is handled by copy_job_attrs().
      *
      * Subscription attribute security is handled by copy_subscription_attrs().
      */

      if (strcmp(fromattr->name, "job-id"))
        continue;
    }

    if (!ra || cupsArrayFind(ra, fromattr->name))
    {
     /*
      * Don't send collection attributes by default to IPP/1.x clients
      * since many do not support collections.  Also don't send
      * media-col-database unless specifically requested by the client.
      */

      if (fromattr->value_tag == IPP_TAG_BEGIN_COLLECTION &&
          !ra &&
          (to->request.status.version[0] == 1 ||
           !strcmp(fromattr->name, "media-col-database")))
        continue;

      ippCopyAttribute(to, fromattr, quickcopy);
    }
  }
}


/*
 * 'copy_banner()' - Copy a banner file to the requests directory for the
 *                   specified job.
 */

static int                              /* O - Size of banner file in kbytes */
copy_banner(cupsd_client_t *con,        /* I - Client connection */
            cupsd_job_t    *job,        /* I - Job information */
            const char     *name)       /* I - Name of banner */
{
  int           i;                      /* Looping var */
  int           kbytes;                 /* Size of banner file in kbytes */
  char          filename[1024];         /* Job filename */
  cupsd_banner_t *banner;               /* Pointer to banner */
  cups_file_t   *in;                    /* Input file */
  cups_file_t   *out;                   /* Output file */
  int           ch;                     /* Character from file */
  char          attrname[255],          /* Name of attribute */
                *s;                     /* Pointer into name */
  ipp_attribute_t *attr;                /* Attribute */


  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "copy_banner(con=%p[%d], job=%p[%d], name=\"%s\")",
                  con, con ? con->http.fd : -1, job, job->id,
                  name ? name : "(null)");

 /*
  * Find the banner; return if not found or "none"...
  */

  if (!name || !strcmp(name, "none") ||
      (banner = cupsdFindBanner(name)) == NULL)
    return (0);

 /*
  * Open the banner and job files...
  */

  if (add_file(con, job, banner->filetype, 0))
    return (-1);

  snprintf(filename, sizeof(filename), "%s/d%05d-%03d", RequestRoot, job->id,
           job->num_files);
  if ((out = cupsFileOpen(filename, "w")) == NULL)
  {
    cupsdLogMessage(CUPSD_LOG_ERROR,
                    "Unable to create banner job file %s - %s",
                    filename, strerror(errno));
    job->num_files --;
    return (0);
  }

  fchmod(cupsFileNumber(out), 0640);
  fchown(cupsFileNumber(out), RunUser, Group);

 /*
  * Try the localized banner file under the subdirectory...
  */

  strlcpy(attrname, job->attrs->attrs->next->values[0].string.text,
          sizeof(attrname));
  if (strlen(attrname) > 2 && attrname[2] == '-')
  {
   /*
    * Convert ll-cc to ll_CC...
    */

    attrname[2] = '_';
    attrname[3] = toupper(attrname[3] & 255);
    attrname[4] = toupper(attrname[4] & 255);
  }

  snprintf(filename, sizeof(filename), "%s/banners/%s/%s", DataDir,
           attrname, name);

  if (access(filename, 0) && strlen(attrname) > 2)
  {
   /*
    * Wasn't able to find "ll_CC" locale file; try the non-national
    * localization banner directory.
    */

    attrname[2] = '\0';

    snprintf(filename, sizeof(filename), "%s/banners/%s/%s", DataDir,
             attrname, name);
  }

  if (access(filename, 0))
  {
   /*
    * Use the non-localized banner file.
    */

    snprintf(filename, sizeof(filename), "%s/banners/%s", DataDir, name);
  }

  if ((in = cupsFileOpen(filename, "r")) == NULL)
  {
    cupsFileClose(out);
    unlink(filename);
    cupsdLogMessage(CUPSD_LOG_ERROR,
                    "Unable to open banner template file %s - %s",
                    filename, strerror(errno));
    job->num_files --;
    return (0);
  }

 /*
  * Parse the file to the end...
  */

  while ((ch = cupsFileGetChar(in)) != EOF)
    if (ch == '{')
    {
     /*
      * Get an attribute name...
      */

      for (s = attrname; (ch = cupsFileGetChar(in)) != EOF;)
        if (!isalpha(ch & 255) && ch != '-' && ch != '?')
          break;
        else if (s < (attrname + sizeof(attrname) - 1))
          *s++ = ch;
        else
          break;

      *s = '\0';

      if (ch != '}')
      {
       /*
        * Ignore { followed by stuff that is not an attribute name...
        */

        cupsFilePrintf(out, "{%s%c", attrname, ch);
        continue;
      }

     /*
      * See if it is defined...
      */

      if (attrname[0] == '?')
        s = attrname + 1;
      else
        s = attrname;

      if (!strcmp(s, "printer-name"))
      {
        cupsFilePuts(out, job->dest);
        continue;
      }
      else if ((attr = ippFindAttribute(job->attrs, s, IPP_TAG_ZERO)) == NULL)
      {
       /*
        * See if we have a leading question mark...
        */

        if (attrname[0] != '?')
        {
         /*
          * Nope, write to file as-is; probably a PostScript procedure...
          */

          cupsFilePrintf(out, "{%s}", attrname);
        }

        continue;
      }

     /*
      * Output value(s)...
      */

      for (i = 0; i < attr->num_values; i ++)
      {
        if (i)
          cupsFilePutChar(out, ',');

        switch (attr->value_tag)
        {
          case IPP_TAG_INTEGER :
          case IPP_TAG_ENUM :
              if (!strncmp(s, "time-at-", 8))
              {
                struct timeval tv;      /* Time value */

                tv.tv_sec  = attr->values[i].integer;
                tv.tv_usec = 0;

                cupsFilePuts(out, cupsdGetDateTime(&tv, CUPSD_TIME_STANDARD));
              }
              else
                cupsFilePrintf(out, "%d", attr->values[i].integer);
              break;

          case IPP_TAG_BOOLEAN :
              cupsFilePrintf(out, "%d", attr->values[i].boolean);
              break;

          case IPP_TAG_NOVALUE :
              cupsFilePuts(out, "novalue");
              break;

          case IPP_TAG_RANGE :
              cupsFilePrintf(out, "%d-%d", attr->values[i].range.lower,
                      attr->values[i].range.upper);
              break;

          case IPP_TAG_RESOLUTION :
              cupsFilePrintf(out, "%dx%d%s", attr->values[i].resolution.xres,
                      attr->values[i].resolution.yres,
                      attr->values[i].resolution.units == IPP_RES_PER_INCH ?
                          "dpi" : "dpcm");
              break;

          case IPP_TAG_URI :
          case IPP_TAG_STRING :
          case IPP_TAG_TEXT :
          case IPP_TAG_NAME :
          case IPP_TAG_KEYWORD :
          case IPP_TAG_CHARSET :
          case IPP_TAG_LANGUAGE :
              if (!_cups_strcasecmp(banner->filetype->type, "postscript"))
              {
               /*
                * Need to quote strings for PS banners...
                */

                const char *p;

                for (p = attr->values[i].string.text; *p; p ++)
                {
                  if (*p == '(' || *p == ')' || *p == '\\')
                  {
                    cupsFilePutChar(out, '\\');
                    cupsFilePutChar(out, *p);
                  }
                  else if (*p < 32 || *p > 126)
                    cupsFilePrintf(out, "\\%03o", *p & 255);
                  else
                    cupsFilePutChar(out, *p);
                }
              }
              else
                cupsFilePuts(out, attr->values[i].string.text);
              break;

          default :
              break; /* anti-compiler-warning-code */
        }
      }
    }
    else if (ch == '\\')        /* Quoted char */
    {
      ch = cupsFileGetChar(in);

      if (ch != '{')            /* Only do special handling for \{ */
        cupsFilePutChar(out, '\\');

      cupsFilePutChar(out, ch);
    }
    else
      cupsFilePutChar(out, ch);

  cupsFileClose(in);

  kbytes = (cupsFileTell(out) + 1023) / 1024;

  if ((attr = ippFindAttribute(job->attrs, "job-k-octets",
                               IPP_TAG_INTEGER)) != NULL)
    attr->values[0].integer += kbytes;

  cupsFileClose(out);

  return (kbytes);
}


/*
 * 'copy_file()' - Copy a PPD file or interface script...
 */

static int                              /* O - 0 = success, -1 = error */
copy_file(const char *from,             /* I - Source file */
          const char *to)               /* I - Destination file */
{
  cups_file_t   *src,                   /* Source file */
                *dst;                   /* Destination file */
  int           bytes;                  /* Bytes to read/write */
  char          buffer[2048];           /* Copy buffer */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "copy_file(\"%s\", \"%s\")", from, to);

 /*
  * Open the source and destination file for a copy...
  */

  if ((src = cupsFileOpen(from, "rb")) == NULL)
    return (-1);

  if ((dst = cupsFileOpen(to, "wb")) == NULL)
  {
    cupsFileClose(src);
    return (-1);
  }

 /*
  * Copy the source file to the destination...
  */

  while ((bytes = cupsFileRead(src, buffer, sizeof(buffer))) > 0)
    if (cupsFileWrite(dst, buffer, bytes) < bytes)
    {
      cupsFileClose(src);
      cupsFileClose(dst);
      return (-1);
    }

 /*
  * Close both files and return...
  */

  cupsFileClose(src);

  return (cupsFileClose(dst));
}


/*
 * 'copy_model()' - Copy a PPD model file, substituting default values
 *                  as needed...
 */

static int                              /* O - 0 = success, -1 = error */
copy_model(cupsd_client_t *con,         /* I - Client connection */
           const char     *from,        /* I - Source file */
           const char     *to)          /* I - Destination file */
{
  fd_set        input;                  /* select() input set */
  struct timeval timeout;               /* select() timeout */
  int           maxfd;                  /* Max file descriptor for select() */
  char          tempfile[1024];         /* Temporary PPD file */
  int           tempfd;                 /* Temporary PPD file descriptor */
  int           temppid;                /* Process ID of cups-driverd */
  int           temppipe[2];            /* Temporary pipes */
  char          *argv[4],               /* Command-line arguments */
                *envp[MAX_ENV];         /* Environment */
  cups_file_t   *src,                   /* Source file */
                *dst;                   /* Destination file */
  ppd_file_t    *ppd;                   /* PPD file */
  int           bytes,                  /* Bytes from pipe */
                total;                  /* Total bytes from pipe */
  char          buffer[2048];           /* Copy buffer */
  int           i;                      /* Looping var */
  char          option[PPD_MAX_NAME],   /* Option name */
                choice[PPD_MAX_NAME];   /* Choice name */
  ppd_size_t    *size;                  /* Default size */
  int           num_defaults;           /* Number of default options */
  cups_option_t *defaults;              /* Default options */
  char          cups_protocol[PPD_MAX_LINE];
                                        /* cupsProtocol attribute */


  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "copy_model(con=%p, from=\"%s\", to=\"%s\")",
                  con, from, to);

 /*
  * Run cups-driverd to get the PPD file...
  */

  argv[0] = "cups-driverd";
  argv[1] = "cat";
  argv[2] = (char *)from;
  argv[3] = NULL;

  cupsdLoadEnv(envp, (int)(sizeof(envp) / sizeof(envp[0])));

  snprintf(buffer, sizeof(buffer), "%s/daemon/cups-driverd", ServerBin);
  snprintf(tempfile, sizeof(tempfile), "%s/%d.ppd", TempDir, con->http.fd);
  tempfd = open(tempfile, O_WRONLY | O_CREAT | O_TRUNC, 0600);
  if (tempfd < 0 || cupsdOpenPipe(temppipe))
    return (-1);

  cupsdLogMessage(CUPSD_LOG_DEBUG,
                  "copy_model: Running \"cups-driverd cat %s\"...", from);

  if (!cupsdStartProcess(buffer, argv, envp, -1, temppipe[1], CGIPipes[1],
                         -1, -1, 0, DefaultProfile, NULL, &temppid))
  {
    close(tempfd);
    unlink(tempfile);

    return (-1);
  }

  close(temppipe[1]);

 /*
  * Wait up to 30 seconds for the PPD file to be copied...
  */

  total = 0;

  if (temppipe[0] > CGIPipes[0])
    maxfd = temppipe[0] + 1;
  else
    maxfd = CGIPipes[0] + 1;

  for (;;)
  {
   /*
    * See if we have data ready...
    */

    FD_ZERO(&input);
    FD_SET(temppipe[0], &input);
    FD_SET(CGIPipes[0], &input);

    timeout.tv_sec  = 30;
    timeout.tv_usec = 0;

    if ((i = select(maxfd, &input, NULL, NULL, &timeout)) < 0)
    {
      if (errno == EINTR)
        continue;
      else
        break;
    }
    else if (i == 0)
    {
     /*
      * We have timed out...
      */

      break;
    }

    if (FD_ISSET(temppipe[0], &input))
    {
     /*
      * Read the PPD file from the pipe, and write it to the PPD file.
      */

      if ((bytes = read(temppipe[0], buffer, sizeof(buffer))) > 0)
      {
        if (write(tempfd, buffer, bytes) < bytes)
          break;

        total += bytes;
      }
      else
        break;
    }

    if (FD_ISSET(CGIPipes[0], &input))
      cupsdUpdateCGI();
  }

  close(temppipe[0]);
  close(tempfd);

  if (!total)
  {
   /*
    * No data from cups-deviced...
    */

    cupsdLogMessage(CUPSD_LOG_ERROR, "copy_model: empty PPD file");
    unlink(tempfile);
    return (-1);
  }

 /*
  * Open the source file for a copy...
  */

  if ((src = cupsFileOpen(tempfile, "rb")) == NULL)
  {
    unlink(tempfile);
    return (-1);
  }

 /*
  * Read the source file and see what page sizes are supported...
  */

  if ((ppd = _ppdOpen(src, _PPD_LOCALIZATION_NONE)) == NULL)
  {
    cupsFileClose(src);
    unlink(tempfile);
    return (-1);
  }

 /*
  * Open the destination (if possible) and set the default options...
  */

  num_defaults     = 0;
  defaults         = NULL;
  cups_protocol[0] = '\0';

  if ((dst = cupsFileOpen(to, "rb")) != NULL)
  {
   /*
    * Read all of the default lines from the old PPD...
    */

    while (cupsFileGets(dst, buffer, sizeof(buffer)))
      if (!strncmp(buffer, "*Default", 8))
      {
       /*
        * Add the default option...
        */

        if (!ppd_parse_line(buffer, option, sizeof(option),
                            choice, sizeof(choice)))
        {
          ppd_option_t  *ppdo;          /* PPD option */


         /*
          * Only add the default if the default hasn't already been
          * set and the choice exists in the new PPD...
          */

          if (!cupsGetOption(option, num_defaults, defaults) &&
              (ppdo = ppdFindOption(ppd, option)) != NULL &&
              ppdFindChoice(ppdo, choice))
            num_defaults = cupsAddOption(option, choice, num_defaults,
                                         &defaults);
        }
      }
      else if (!strncmp(buffer, "*cupsProtocol:", 14))
        strlcpy(cups_protocol, buffer, sizeof(cups_protocol));

    cupsFileClose(dst);
  }
  else if ((size = ppdPageSize(ppd, DefaultPaperSize)) != NULL)
  {
   /*
    * Add the default media sizes...
    */

    num_defaults = cupsAddOption("PageSize", size->name,
                                 num_defaults, &defaults);
    num_defaults = cupsAddOption("PageRegion", size->name,
                                 num_defaults, &defaults);
    num_defaults = cupsAddOption("PaperDimension", size->name,
                                 num_defaults, &defaults);
    num_defaults = cupsAddOption("ImageableArea", size->name,
                                 num_defaults, &defaults);
  }

  ppdClose(ppd);

 /*
  * Open the destination file for a copy...
  */

  if ((dst = cupsFileOpen(to, "wb")) == NULL)
  {
    cupsFreeOptions(num_defaults, defaults);
    cupsFileClose(src);
    unlink(tempfile);
    return (-1);
  }

 /*
  * Copy the source file to the destination...
  */

  cupsFileRewind(src);

  while (cupsFileGets(src, buffer, sizeof(buffer)))
  {
    if (!strncmp(buffer, "*Default", 8))
    {
     /*
      * Check for an previous default option choice...
      */

      if (!ppd_parse_line(buffer, option, sizeof(option),
                          choice, sizeof(choice)))
      {
        const char      *val;           /* Default option value */


        if ((val = cupsGetOption(option, num_defaults, defaults)) != NULL)
        {
         /*
          * Substitute the previous choice...
          */

          snprintf(buffer, sizeof(buffer), "*Default%s: %s", option, val);
        }
      }
    }

    cupsFilePrintf(dst, "%s\n", buffer);
  }

  if (cups_protocol[0])
    cupsFilePrintf(dst, "%s\n", cups_protocol);

  cupsFreeOptions(num_defaults, defaults);

 /*
  * Close both files and return...
  */

  cupsFileClose(src);

  unlink(tempfile);

  return (cupsFileClose(dst));
}


/*
 * 'copy_job_attrs()' - Copy job attributes.
 */

static void
copy_job_attrs(cupsd_client_t *con,     /* I - Client connection */
               cupsd_job_t    *job,     /* I - Job */
               cups_array_t   *ra,      /* I - Requested attributes array */
               cups_array_t   *exclude) /* I - Private attributes array */
{
  char  job_uri[HTTP_MAX_URI];          /* Job URI */


 /*
  * Send the requested attributes for each job...
  */

  if (!cupsArrayFind(exclude, "all"))
  {
    if ((!exclude || !cupsArrayFind(exclude, "number-of-documents")) &&
        (!ra || cupsArrayFind(ra, "number-of-documents")))
      ippAddInteger(con->response, IPP_TAG_JOB, IPP_TAG_INTEGER,
                    "number-of-documents", job->num_files);

    if ((!exclude || !cupsArrayFind(exclude, "job-media-progress")) &&
        (!ra || cupsArrayFind(ra, "job-media-progress")))
      ippAddInteger(con->response, IPP_TAG_JOB, IPP_TAG_INTEGER,
                    "job-media-progress", job->progress);

    if ((!exclude || !cupsArrayFind(exclude, "job-more-info")) &&
        (!ra || cupsArrayFind(ra, "job-more-info")))
    {
      httpAssembleURIf(HTTP_URI_CODING_ALL, job_uri, sizeof(job_uri), "http",
                       NULL, con->servername, con->serverport, "/jobs/%d",
                       job->id);
      ippAddString(con->response, IPP_TAG_JOB, IPP_TAG_URI,
                   "job-more-info", NULL, job_uri);
    }

    if (job->state_value > IPP_JOB_PROCESSING &&
        (!exclude || !cupsArrayFind(exclude, "job-preserved")) &&
        (!ra || cupsArrayFind(ra, "job-preserved")))
      ippAddBoolean(con->response, IPP_TAG_JOB, "job-preserved",
                    job->num_files > 0);

    if ((!exclude || !cupsArrayFind(exclude, "job-printer-up-time")) &&
        (!ra || cupsArrayFind(ra, "job-printer-up-time")))
      ippAddInteger(con->response, IPP_TAG_JOB, IPP_TAG_INTEGER,
                    "job-printer-up-time", time(NULL));
  }

  if (!ra || cupsArrayFind(ra, "job-printer-uri"))
  {
    httpAssembleURIf(HTTP_URI_CODING_ALL, job_uri, sizeof(job_uri), "ipp", NULL,
                     con->servername, con->serverport,
                     (job->dtype & CUPS_PRINTER_CLASS) ? "/classes/%s" :
                                                         "/printers/%s",
                     job->dest);
    ippAddString(con->response, IPP_TAG_JOB, IPP_TAG_URI,
                 "job-printer-uri", NULL, job_uri);
  }

  if (!ra || cupsArrayFind(ra, "job-uri"))
  {
    httpAssembleURIf(HTTP_URI_CODING_ALL, job_uri, sizeof(job_uri), "ipp", NULL,
                     con->servername, con->serverport, "/jobs/%d",
                     job->id);
    ippAddString(con->response, IPP_TAG_JOB, IPP_TAG_URI,
                 "job-uri", NULL, job_uri);
  }

  copy_attrs(con->response, job->attrs, ra, IPP_TAG_JOB, 0, exclude);
}


/*
 * 'copy_printer_attrs()' - Copy printer attributes.
 */

static void
copy_printer_attrs(
    cupsd_client_t  *con,               /* I - Client connection */
    cupsd_printer_t *printer,           /* I - Printer */
    cups_array_t    *ra)                /* I - Requested attributes array */
{
  char                  printer_uri[HTTP_MAX_URI];
                                        /* Printer URI */
  char                  printer_icons[HTTP_MAX_URI];
                                        /* Printer icons */
  time_t                curtime;        /* Current time */
  int                   i;              /* Looping var */


 /*
  * Copy the printer attributes to the response using requested-attributes
  * and document-format attributes that may be provided by the client.
  */

  curtime = time(NULL);

  if (!ra || cupsArrayFind(ra, "marker-change-time"))
    ippAddInteger(con->response, IPP_TAG_PRINTER, IPP_TAG_INTEGER,
                  "marker-change-time", printer->marker_time);

  if (printer->num_printers > 0 &&
      (!ra || cupsArrayFind(ra, "member-uris")))
  {
    ipp_attribute_t     *member_uris;   /* member-uris attribute */
    cupsd_printer_t     *p2;            /* Printer in class */
    ipp_attribute_t     *p2_uri;        /* printer-uri-supported for class printer */


    if ((member_uris = ippAddStrings(con->response, IPP_TAG_PRINTER,
                                     IPP_TAG_URI, "member-uris",
                                     printer->num_printers, NULL,
                                     NULL)) != NULL)
    {
      for (i = 0; i < printer->num_printers; i ++)
      {
        p2 = printer->printers[i];

        if ((p2_uri = ippFindAttribute(p2->attrs, "printer-uri-supported",
                                       IPP_TAG_URI)) != NULL)
          member_uris->values[i].string.text =
              _cupsStrRetain(p2_uri->values[0].string.text);
        else
        {
          httpAssembleURIf(HTTP_URI_CODING_ALL, printer_uri,
                           sizeof(printer_uri), "ipp", NULL, con->servername,
                           con->serverport,
                           (p2->type & CUPS_PRINTER_CLASS) ?
                               "/classes/%s" : "/printers/%s", p2->name);
          member_uris->values[i].string.text = _cupsStrAlloc(printer_uri);
        }
      }
    }
  }

  if (printer->alert && (!ra || cupsArrayFind(ra, "printer-alert")))
    ippAddString(con->response, IPP_TAG_PRINTER, IPP_TAG_STRING,
                 "printer-alert", NULL, printer->alert);

  if (printer->alert_description &&
      (!ra || cupsArrayFind(ra, "printer-alert-description")))
    ippAddString(con->response, IPP_TAG_PRINTER, IPP_TAG_TEXT,
                 "printer-alert-description", NULL,
                 printer->alert_description);

  if (!ra || cupsArrayFind(ra, "printer-current-time"))
    ippAddDate(con->response, IPP_TAG_PRINTER, "printer-current-time",
               ippTimeToDate(curtime));

#ifdef HAVE_DNSSD
  if (!ra || cupsArrayFind(ra, "printer-dns-sd-name"))
  {
    if (printer->reg_name)
      ippAddString(con->response, IPP_TAG_PRINTER, IPP_TAG_NAME,
                   "printer-dns-sd-name", NULL, printer->reg_name);
    else
      ippAddInteger(con->response, IPP_TAG_PRINTER, IPP_TAG_NOVALUE,
                   "printer-dns-sd-name", 0);
  }
#endif /* HAVE_DNSSD */

  if (!ra || cupsArrayFind(ra, "printer-error-policy"))
    ippAddString(con->response, IPP_TAG_PRINTER, IPP_TAG_NAME,
                 "printer-error-policy", NULL, printer->error_policy);

  if (!ra || cupsArrayFind(ra, "printer-error-policy-supported"))
  {
    static const char * const errors[] =/* printer-error-policy-supported values */
                  {
                    "abort-job",
                    "retry-current-job",
                    "retry-job",
                    "stop-printer"
                  };

    if (printer->type & CUPS_PRINTER_CLASS)
      ippAddString(con->response, IPP_TAG_PRINTER, IPP_TAG_NAME | IPP_TAG_COPY,
                   "printer-error-policy-supported", NULL, "retry-current-job");
    else
      ippAddStrings(con->response, IPP_TAG_PRINTER, IPP_TAG_NAME | IPP_TAG_COPY,
                    "printer-error-policy-supported",
                    sizeof(errors) / sizeof(errors[0]), NULL, errors);
  }

  if (!ra || cupsArrayFind(ra, "printer-icons"))
  {
    httpAssembleURIf(HTTP_URI_CODING_ALL, printer_icons, sizeof(printer_icons),
                     "http", NULL, con->servername, con->serverport,
                     "/icons/%s.png", printer->name);
    ippAddString(con->response, IPP_TAG_PRINTER, IPP_TAG_URI, "printer-icons",
                 NULL, printer_icons);
    cupsdLogMessage(CUPSD_LOG_DEBUG2, "printer-icons=\"%s\"", printer_icons);
  }

  if (!ra || cupsArrayFind(ra, "printer-is-accepting-jobs"))
    ippAddBoolean(con->response, IPP_TAG_PRINTER, "printer-is-accepting-jobs",
                  printer->accepting);

  if (!ra || cupsArrayFind(ra, "printer-is-shared"))
    ippAddBoolean(con->response, IPP_TAG_PRINTER, "printer-is-shared",
                  printer->shared);

  if (!ra || cupsArrayFind(ra, "printer-more-info"))
  {
    httpAssembleURIf(HTTP_URI_CODING_ALL, printer_uri, sizeof(printer_uri),
                     "http", NULL, con->servername, con->serverport,
                     (printer->type & CUPS_PRINTER_CLASS) ?
                         "/classes/%s" : "/printers/%s", printer->name);
    ippAddString(con->response, IPP_TAG_PRINTER, IPP_TAG_URI,
                 "printer-more-info", NULL, printer_uri);
  }

  if (!ra || cupsArrayFind(ra, "printer-op-policy"))
    ippAddString(con->response, IPP_TAG_PRINTER, IPP_TAG_NAME,
                 "printer-op-policy", NULL, printer->op_policy);

  if (!ra || cupsArrayFind(ra, "printer-state"))
    ippAddInteger(con->response, IPP_TAG_PRINTER, IPP_TAG_ENUM, "printer-state",
                  printer->state);

  if (!ra || cupsArrayFind(ra, "printer-state-change-time"))
    ippAddInteger(con->response, IPP_TAG_PRINTER, IPP_TAG_INTEGER,
                  "printer-state-change-time", printer->state_time);

  if (!ra || cupsArrayFind(ra, "printer-state-message"))
    ippAddString(con->response, IPP_TAG_PRINTER, IPP_TAG_TEXT,
                 "printer-state-message", NULL, printer->state_message);

  if (!ra || cupsArrayFind(ra, "printer-state-reasons"))
    add_printer_state_reasons(con, printer);

  if (!ra || cupsArrayFind(ra, "printer-type"))
  {
    int type;                           /* printer-type value */

   /*
    * Add the CUPS-specific printer-type attribute...
    */

    type = printer->type;

    if (printer == DefaultPrinter)
      type |= CUPS_PRINTER_DEFAULT;

    if (!printer->accepting)
      type |= CUPS_PRINTER_REJECTING;

    if (!printer->shared)
      type |= CUPS_PRINTER_NOT_SHARED;

    ippAddInteger(con->response, IPP_TAG_PRINTER, IPP_TAG_ENUM, "printer-type",
                  type);
  }

  if (!ra || cupsArrayFind(ra, "printer-up-time"))
    ippAddInteger(con->response, IPP_TAG_PRINTER, IPP_TAG_INTEGER,
                  "printer-up-time", curtime);

  if (!ra || cupsArrayFind(ra, "printer-uri-supported"))
  {
    httpAssembleURIf(HTTP_URI_CODING_ALL, printer_uri, sizeof(printer_uri),
                     "ipp", NULL, con->servername, con->serverport,
                     (printer->type & CUPS_PRINTER_CLASS) ?
                         "/classes/%s" : "/printers/%s", printer->name);
    ippAddString(con->response, IPP_TAG_PRINTER, IPP_TAG_URI,
                 "printer-uri-supported", NULL, printer_uri);
    cupsdLogMessage(CUPSD_LOG_DEBUG2, "printer-uri-supported=\"%s\"",
                    printer_uri);
  }

  if (!ra || cupsArrayFind(ra, "queued-job-count"))
    add_queued_job_count(con, printer);

  copy_attrs(con->response, printer->attrs, ra, IPP_TAG_ZERO, 0, NULL);
  if (printer->ppd_attrs)
    copy_attrs(con->response, printer->ppd_attrs, ra, IPP_TAG_ZERO, 0, NULL);
  copy_attrs(con->response, CommonData, ra, IPP_TAG_ZERO, IPP_TAG_COPY, NULL);
}


/*
 * 'copy_subscription_attrs()' - Copy subscription attributes.
 */

static void
copy_subscription_attrs(
    cupsd_client_t       *con,          /* I - Client connection */
    cupsd_subscription_t *sub,          /* I - Subscription */
    cups_array_t         *ra,           /* I - Requested attributes array */
    cups_array_t         *exclude)      /* I - Private attributes array */
{
  ipp_attribute_t       *attr;          /* Current attribute */
  char                  printer_uri[HTTP_MAX_URI];
                                        /* Printer URI */
  int                   count;          /* Number of events */
  unsigned              mask;           /* Current event mask */
  const char            *name;          /* Current event name */


  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "copy_subscription_attrs(con=%p, sub=%p, ra=%p, exclude=%p)",
                  con, sub, ra, exclude);

 /*
  * Copy the subscription attributes to the response using the
  * requested-attributes attribute that may be provided by the client.
  */

  if (!exclude || !cupsArrayFind(exclude, "all"))
  {
    if ((!exclude || !cupsArrayFind(exclude, "notify-events")) &&
        (!ra || cupsArrayFind(ra, "notify-events")))
    {
      cupsdLogMessage(CUPSD_LOG_DEBUG2, "copy_subscription_attrs: notify-events");

      if ((name = cupsdEventName((cupsd_eventmask_t)sub->mask)) != NULL)
      {
       /*
        * Simple event list...
        */

        ippAddString(con->response, IPP_TAG_SUBSCRIPTION,
                     (ipp_tag_t)(IPP_TAG_KEYWORD | IPP_TAG_COPY),
                     "notify-events", NULL, name);
      }
      else
      {
       /*
        * Complex event list...
        */

        for (mask = 1, count = 0; mask < CUPSD_EVENT_ALL; mask <<= 1)
          if (sub->mask & mask)
            count ++;

        attr = ippAddStrings(con->response, IPP_TAG_SUBSCRIPTION,
                             (ipp_tag_t)(IPP_TAG_KEYWORD | IPP_TAG_COPY),
                             "notify-events", count, NULL, NULL);

        for (mask = 1, count = 0; mask < CUPSD_EVENT_ALL; mask <<= 1)
          if (sub->mask & mask)
          {
            attr->values[count].string.text =
                (char *)cupsdEventName((cupsd_eventmask_t)mask);

            count ++;
          }
      }
    }

    if ((!exclude || !cupsArrayFind(exclude, "notify-lease-duration")) &&
        (!sub->job && (!ra || cupsArrayFind(ra, "notify-lease-duration"))))
      ippAddInteger(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_INTEGER,
                    "notify-lease-duration", sub->lease);

    if ((!exclude || !cupsArrayFind(exclude, "notify-recipient-uri")) &&
        (sub->recipient && (!ra || cupsArrayFind(ra, "notify-recipient-uri"))))
      ippAddString(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_URI,
                   "notify-recipient-uri", NULL, sub->recipient);
    else if ((!exclude || !cupsArrayFind(exclude, "notify-pull-method")) &&
             (!ra || cupsArrayFind(ra, "notify-pull-method")))
      ippAddString(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_KEYWORD,
                   "notify-pull-method", NULL, "ippget");

    if ((!exclude || !cupsArrayFind(exclude, "notify-subscriber-user-name")) &&
        (!ra || cupsArrayFind(ra, "notify-subscriber-user-name")))
      ippAddString(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_NAME,
                   "notify-subscriber-user-name", NULL, sub->owner);

    if ((!exclude || !cupsArrayFind(exclude, "notify-time-interval")) &&
        (!ra || cupsArrayFind(ra, "notify-time-interval")))
      ippAddInteger(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_INTEGER,
                    "notify-time-interval", sub->interval);

    if (sub->user_data_len > 0 &&
        (!exclude || !cupsArrayFind(exclude, "notify-user-data")) &&
        (!ra || cupsArrayFind(ra, "notify-user-data")))
      ippAddOctetString(con->response, IPP_TAG_SUBSCRIPTION, "notify-user-data",
                        sub->user_data, sub->user_data_len);
  }

  if (sub->job && (!ra || cupsArrayFind(ra, "notify-job-id")))
    ippAddInteger(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_INTEGER,
                  "notify-job-id", sub->job->id);

  if (sub->dest && (!ra || cupsArrayFind(ra, "notify-printer-uri")))
  {
    httpAssembleURIf(HTTP_URI_CODING_ALL, printer_uri, sizeof(printer_uri),
                     "ipp", NULL, con->servername, con->serverport,
                     "/printers/%s", sub->dest->name);
    ippAddString(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_URI,
                 "notify-printer-uri", NULL, printer_uri);
  }

  if (!ra || cupsArrayFind(ra, "notify-subscription-id"))
    ippAddInteger(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_INTEGER,
                  "notify-subscription-id", sub->id);
}


/*
 * 'create_job()' - Print a file to a printer or class.
 */

static void
create_job(cupsd_client_t  *con,        /* I - Client connection */
           ipp_attribute_t *uri)        /* I - Printer URI */
{
  int                   i;              /* Looping var */
  cupsd_printer_t       *printer;       /* Printer */
  cupsd_job_t           *job;           /* New job */
  static const char * const forbidden_attrs[] =
  {                                     /* List of forbidden attributes */
    "compression",
    "document-format",
    "document-name",
    "document-natural-language"
  };


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "create_job(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Is the destination valid?
  */

  if (!cupsdValidateDest(uri->values[0].string.text, NULL, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * Check for invalid Create-Job attributes and log a warning or error depending
  * on whether cupsd is running in "strict conformance" mode...
  */

  for (i = 0;
       i < (int)(sizeof(forbidden_attrs) / sizeof(forbidden_attrs[0]));
       i ++)
    if (ippFindAttribute(con->request, forbidden_attrs[i], IPP_TAG_ZERO))
    {
      if (StrictConformance)
      {
        send_ipp_status(con, IPP_BAD_REQUEST,
                        _("The '%s' operation attribute cannot be supplied in a "
                          "Create-Job request."), forbidden_attrs[i]);
        return;
      }

      cupsdLogMessage(CUPSD_LOG_WARN,
                      "Unexpected '%s' operation attribute in a Create-Job "
                      "request.", forbidden_attrs[i]);
    }

 /*
  * Create the job object...
  */

  if ((job = add_job(con, printer, NULL)) == NULL)
    return;

  job->pending_timeout = 1;

 /*
  * Save and log the job...
  */

  cupsdLogJob(job, CUPSD_LOG_INFO, "Queued on \"%s\" by \"%s\".",
              job->dest, job->username);
}


/*
 * 'create_requested_array()' - Create an array for the requested-attributes.
 */

static cups_array_t *                   /* O - Array of attributes or NULL */
create_requested_array(ipp_t *request)  /* I - IPP request */
{
  int                   i;              /* Looping var */
  ipp_attribute_t       *requested;     /* requested-attributes attribute */
  cups_array_t          *ra;            /* Requested attributes array */
  char                  *value;         /* Current value */


 /*
  * Get the requested-attributes attribute, and return NULL if we don't
  * have one...
  */

  if ((requested = ippFindAttribute(request, "requested-attributes",
                                    IPP_TAG_KEYWORD)) == NULL)
    return (NULL);

 /*
  * If the attribute contains a single "all" keyword, return NULL...
  */

  if (requested->num_values == 1 &&
      !strcmp(requested->values[0].string.text, "all"))
    return (NULL);

 /*
  * Create an array using "strcmp" as the comparison function...
  */

  ra = cupsArrayNew((cups_array_func_t)strcmp, NULL);

  for (i = 0; i < requested->num_values; i ++)
  {
    value = requested->values[i].string.text;

    if (!strcmp(value, "job-template"))
    {
      /* Only includes the set of Job Template attributes supported by CUPS */
      cupsArrayAdd(ra, "copies");
      cupsArrayAdd(ra, "copies-default");
      cupsArrayAdd(ra, "copies-supported");
      cupsArrayAdd(ra, "finishings");
      cupsArrayAdd(ra, "finishings-default");
      cupsArrayAdd(ra, "finishings-supported");
      cupsArrayAdd(ra, "job-hold-until");
      cupsArrayAdd(ra, "job-hold-until-default");
      cupsArrayAdd(ra, "job-hold-until-supported");
      cupsArrayAdd(ra, "job-priority");
      cupsArrayAdd(ra, "job-priority-default");
      cupsArrayAdd(ra, "job-priority-supported");
      cupsArrayAdd(ra, "job-sheets");
      cupsArrayAdd(ra, "job-sheets-default");
      cupsArrayAdd(ra, "job-sheets-supported");
      cupsArrayAdd(ra, "media");
      cupsArrayAdd(ra, "media-col");
      cupsArrayAdd(ra, "media-col-default");
      cupsArrayAdd(ra, "media-default");
      cupsArrayAdd(ra, "media-supported");
      cupsArrayAdd(ra, "multiple-document-handling");
      cupsArrayAdd(ra, "multiple-document-handling-default");
      cupsArrayAdd(ra, "multiple-document-handling-supported");
      cupsArrayAdd(ra, "number-up");
      cupsArrayAdd(ra, "number-up-default");
      cupsArrayAdd(ra, "number-up-layout");
      cupsArrayAdd(ra, "number-up-layout-default");
      cupsArrayAdd(ra, "number-up-layout-supported");
      cupsArrayAdd(ra, "number-up-supported");
      cupsArrayAdd(ra, "orientation-requested");
      cupsArrayAdd(ra, "orientation-requested-default");
      cupsArrayAdd(ra, "orientation-requested-supported");
      cupsArrayAdd(ra, "output-bin");
      cupsArrayAdd(ra, "output-bin-default");
      cupsArrayAdd(ra, "output-bin-supported");
      cupsArrayAdd(ra, "page-delivery");
      cupsArrayAdd(ra, "page-delivery-default");
      cupsArrayAdd(ra, "page-delivery-supported");
      cupsArrayAdd(ra, "page-order-received");
      cupsArrayAdd(ra, "page-order-received-default");
      cupsArrayAdd(ra, "page-order-received-supported");
      cupsArrayAdd(ra, "page-ranges");
      cupsArrayAdd(ra, "page-ranges-supported");
      cupsArrayAdd(ra, "presentation-direction-number-up");
      cupsArrayAdd(ra, "presentation-direction-number-up-default");
      cupsArrayAdd(ra, "presentation-direction-number-up-supported");
      cupsArrayAdd(ra, "print-color-mode");
      cupsArrayAdd(ra, "print-color-mode-default");
      cupsArrayAdd(ra, "print-color-mode-supported");
      cupsArrayAdd(ra, "print-content-optimize");
      cupsArrayAdd(ra, "print-content-optimize-default");
      cupsArrayAdd(ra, "print-content-optimize-supported");
      cupsArrayAdd(ra, "print-quality");
      cupsArrayAdd(ra, "print-quality-default");
      cupsArrayAdd(ra, "print-quality-supported");
      cupsArrayAdd(ra, "printer-resolution");
      cupsArrayAdd(ra, "printer-resolution-default");
      cupsArrayAdd(ra, "printer-resolution-supported");
      cupsArrayAdd(ra, "sheet-collate");
      cupsArrayAdd(ra, "sheet-collate-default");
      cupsArrayAdd(ra, "sheet-collate-supported");
      cupsArrayAdd(ra, "sides");
      cupsArrayAdd(ra, "sides-default");
      cupsArrayAdd(ra, "sides-supported");
    }
    else if (!strcmp(value, "job-description"))
    {
      /* Only includes the set of Job Description attributes supported by CUPS */
      cupsArrayAdd(ra, "date-time-at-completed");
      cupsArrayAdd(ra, "date-time-at-creation");
      cupsArrayAdd(ra, "date-time-at-processing");
      cupsArrayAdd(ra, "job-detailed-status-message");
      cupsArrayAdd(ra, "job-document-access-errors");
      cupsArrayAdd(ra, "job-id");
      cupsArrayAdd(ra, "job-impressions");
      cupsArrayAdd(ra, "job-impressions-completed");
      cupsArrayAdd(ra, "job-k-octets");
      cupsArrayAdd(ra, "job-k-octets-processed");
      cupsArrayAdd(ra, "job-mandatory-attributes");
      cupsArrayAdd(ra, "job-media-progress");
      cupsArrayAdd(ra, "job-media-sheets");
      cupsArrayAdd(ra, "job-media-sheets-completed");
      cupsArrayAdd(ra, "job-message-from-operator");
      cupsArrayAdd(ra, "job-more-info");
      cupsArrayAdd(ra, "job-name");
      cupsArrayAdd(ra, "job-originating-user-name");
      cupsArrayAdd(ra, "job-printer-up-time");
      cupsArrayAdd(ra, "job-printer-uri");
      cupsArrayAdd(ra, "job-state");
      cupsArrayAdd(ra, "job-state-message");
      cupsArrayAdd(ra, "job-state-reasons");
      cupsArrayAdd(ra, "job-uri");
      cupsArrayAdd(ra, "number-of-documents");
      cupsArrayAdd(ra, "number-of-intervening-jobs");
      cupsArrayAdd(ra, "output-device-assigned");
      cupsArrayAdd(ra, "time-at-completed");
      cupsArrayAdd(ra, "time-at-creation");
      cupsArrayAdd(ra, "time-at-processing");
    }
    else if (!strcmp(value, "printer-description"))
    {
      /* Only includes the set of Printer Description attributes supported by CUPS */
      cupsArrayAdd(ra, "charset-configured");
      cupsArrayAdd(ra, "charset-supported");
      cupsArrayAdd(ra, "color-supported");
      cupsArrayAdd(ra, "compression-supported");
      cupsArrayAdd(ra, "document-format-default");
      cupsArrayAdd(ra, "document-format-supported");
      cupsArrayAdd(ra, "generated-natural-language-supported");
      cupsArrayAdd(ra, "ipp-versions-supported");
      cupsArrayAdd(ra, "job-creation-attributes-supported");
      cupsArrayAdd(ra, "job-ids-supported");
      cupsArrayAdd(ra, "job-impressions-supported");
      cupsArrayAdd(ra, "job-k-octets-supported");
      cupsArrayAdd(ra, "job-media-sheets-supported");
      cupsArrayAdd(ra, "job-settable-attributes-supported");
      cupsArrayAdd(ra, "jpeg-k-octets-supported");
      cupsArrayAdd(ra, "jpeg-x-dimension-supported");
      cupsArrayAdd(ra, "jpeg-y-dimension-supported");
      cupsArrayAdd(ra, "media-bottom-margin-supported");
      cupsArrayAdd(ra, "media-col-supported");
      cupsArrayAdd(ra, "media-key-supported");
      cupsArrayAdd(ra, "media-left-margin-supported");
      cupsArrayAdd(ra, "media-right-margin-supported");
      cupsArrayAdd(ra, "media-size-supported");
      cupsArrayAdd(ra, "media-source-supported");
      cupsArrayAdd(ra, "media-top-margin-supported");
      cupsArrayAdd(ra, "media-type-supported");
      cupsArrayAdd(ra, "multiple-document-jobs-supported");
      cupsArrayAdd(ra, "multiple-operation-time-out");
      cupsArrayAdd(ra, "natural-language-configured");
      cupsArrayAdd(ra, "notify-max-events-supported");
      cupsArrayAdd(ra, "notify-schemes-supported");
      cupsArrayAdd(ra, "operations-supported");
      cupsArrayAdd(ra, "pages-per-minute");
      cupsArrayAdd(ra, "pages-per-minute-color");
      cupsArrayAdd(ra, "pdf-k-octets-supported");
      cupsArrayAdd(ra, "pdl-override-supported");
      cupsArrayAdd(ra, "printer-alert");
      cupsArrayAdd(ra, "printer-alert-description");
      cupsArrayAdd(ra, "printer-commands");
      cupsArrayAdd(ra, "printer-current-time");
      cupsArrayAdd(ra, "printer-dns-sd-name");
      cupsArrayAdd(ra, "printer-info");
      cupsArrayAdd(ra, "printer-is-accepting-jobs");
      cupsArrayAdd(ra, "printer-is-shared");
      cupsArrayAdd(ra, "printer-location");
      cupsArrayAdd(ra, "printer-make-and-model");
      cupsArrayAdd(ra, "printer-message-from-operator");
      cupsArrayAdd(ra, "printer-more-info");
      cupsArrayAdd(ra, "printer-more-info-manufacturer");
      cupsArrayAdd(ra, "printer-name");
      cupsArrayAdd(ra, "printer-settable-attributes-supported");
      cupsArrayAdd(ra, "printer-state");
      cupsArrayAdd(ra, "printer-state-change-date-time");
      cupsArrayAdd(ra, "printer-state-change-time");
      cupsArrayAdd(ra, "printer-state-message");
      cupsArrayAdd(ra, "printer-state-reasons");
      cupsArrayAdd(ra, "printer-type");
      cupsArrayAdd(ra, "printer-up-time");
      cupsArrayAdd(ra, "printer-uri-supported");
      cupsArrayAdd(ra, "queued-job-count");
      cupsArrayAdd(ra, "reference-uri-schemes-supported");
      cupsArrayAdd(ra, "uri-authentication-supported");
      cupsArrayAdd(ra, "uri-security-supported");
      cupsArrayAdd(ra, "which-jobs-supported");
    }
    else if (!strcmp(value, "printer-defaults"))
    {
      char      *name;                  /* Option name */


      for (name = (char *)cupsArrayFirst(CommonDefaults);
           name;
           name = (char *)cupsArrayNext(CommonDefaults))
        cupsArrayAdd(ra, name);
    }
    else if (!strcmp(value, "subscription-description"))
    {
      /* Only includes the set of Subscription Description attributes supported by CUPS */
      cupsArrayAdd(ra, "notify-job-id");
      cupsArrayAdd(ra, "notify-lease-expiration-time");
      cupsArrayAdd(ra, "notify-printer-up-time");
      cupsArrayAdd(ra, "notify-printer-uri");
      cupsArrayAdd(ra, "notify-sequence-number");
      cupsArrayAdd(ra, "notify-subscriber-user-name");
      cupsArrayAdd(ra, "notify-subscription-id");
    }
    else if (!strcmp(value, "subscription-template"))
    {
      /* Only includes the set of Subscription Template attributes supported by CUPS */
      cupsArrayAdd(ra, "notify-attributes");
      cupsArrayAdd(ra, "notify-attributes-supported");
      cupsArrayAdd(ra, "notify-charset");
      cupsArrayAdd(ra, "notify-events");
      cupsArrayAdd(ra, "notify-events-default");
      cupsArrayAdd(ra, "notify-events-supported");
      cupsArrayAdd(ra, "notify-lease-duration");
      cupsArrayAdd(ra, "notify-lease-duration-default");
      cupsArrayAdd(ra, "notify-lease-duration-supported");
      cupsArrayAdd(ra, "notify-natural-language");
      cupsArrayAdd(ra, "notify-pull-method");
      cupsArrayAdd(ra, "notify-pull-method-supported");
      cupsArrayAdd(ra, "notify-recipient-uri");
      cupsArrayAdd(ra, "notify-time-interval");
      cupsArrayAdd(ra, "notify-user-data");
    }
    else
      cupsArrayAdd(ra, value);
  }

  return (ra);
}


/*
 * 'create_subscription()' - Create a notification subscription.
 */

static void
create_subscription(
    cupsd_client_t  *con,               /* I - Client connection */
    ipp_attribute_t *uri)               /* I - Printer URI */
{
  http_status_t status;                 /* Policy status */
  int                   i;              /* Looping var */
  ipp_attribute_t       *attr;          /* Current attribute */
  cups_ptype_t          dtype;          /* Destination type (printer/class) */
  char                  scheme[HTTP_MAX_URI],
                                        /* Scheme portion of URI */
                        userpass[HTTP_MAX_URI],
                                        /* Username portion of URI */
                        host[HTTP_MAX_URI],
                                        /* Host portion of URI */
                        resource[HTTP_MAX_URI];
                                        /* Resource portion of URI */
  int                   port;           /* Port portion of URI */
  cupsd_printer_t       *printer;       /* Printer/class */
  cupsd_job_t           *job;           /* Job */
  int                   jobid;          /* Job ID */
  cupsd_subscription_t  *sub;           /* Subscription object */
  const char            *username,      /* requesting-user-name or
                                           authenticated username */
                        *recipient,     /* notify-recipient-uri */
                        *pullmethod;    /* notify-pull-method */
  ipp_attribute_t       *user_data;     /* notify-user-data */
  int                   interval,       /* notify-time-interval */
                        lease;          /* notify-lease-duration */
  unsigned              mask;           /* notify-events */
  ipp_attribute_t       *notify_events,/* notify-events(-default) */
                        *notify_lease;  /* notify-lease-duration(-default) */


#ifdef DEBUG
  for (attr = con->request->attrs; attr; attr = attr->next)
  {
    if (attr->group_tag != IPP_TAG_ZERO)
      cupsdLogMessage(CUPSD_LOG_DEBUG2, "g%04x v%04x %s", attr->group_tag,
                      attr->value_tag, attr->name);
    else
      cupsdLogMessage(CUPSD_LOG_DEBUG2, "----SEP----");
  }
#endif /* DEBUG */

 /*
  * Is the destination valid?
  */

  cupsdLogMessage(CUPSD_LOG_DEBUG,
                  "cupsdCreateSubscription(con=%p(%d), uri=\"%s\")",
                  con, con->http.fd, uri->values[0].string.text);

  httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text, scheme,
                  sizeof(scheme), userpass, sizeof(userpass), host,
                  sizeof(host), &port, resource, sizeof(resource));

  if (!strcmp(resource, "/"))
  {
    dtype   = (cups_ptype_t)0;
    printer = NULL;
  }
  else if (!strncmp(resource, "/printers", 9) && strlen(resource) <= 10)
  {
    dtype   = (cups_ptype_t)0;
    printer = NULL;
  }
  else if (!strncmp(resource, "/classes", 8) && strlen(resource) <= 9)
  {
    dtype   = CUPS_PRINTER_CLASS;
    printer = NULL;
  }
  else if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * Check policy...
  */

  if (printer)
  {
    if ((status = cupsdCheckPolicy(printer->op_policy_ptr, con,
                                   NULL)) != HTTP_OK)
    {
      send_http_error(con, status, printer);
      return;
    }
  }
  else if ((status = cupsdCheckPolicy(DefaultPolicyPtr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, NULL);
    return;
  }

 /*
  * Get the user that is requesting the subscription...
  */

  username = get_username(con);

 /*
  * Find the first subscription group attribute; return if we have
  * none...
  */

  for (attr = con->request->attrs; attr; attr = attr->next)
    if (attr->group_tag == IPP_TAG_SUBSCRIPTION)
      break;

  if (!attr)
  {
    send_ipp_status(con, IPP_BAD_REQUEST,
                    _("No subscription attributes in request."));
    return;
  }

 /*
  * Process the subscription attributes in the request...
  */

  con->response->request.status.status_code = IPP_BAD_REQUEST;

  while (attr)
  {
    recipient = NULL;
    pullmethod = NULL;
    user_data  = NULL;
    interval   = 0;
    lease      = DefaultLeaseDuration;
    jobid      = 0;
    mask       = CUPSD_EVENT_NONE;

    if (printer)
    {
      notify_events = ippFindAttribute(printer->attrs, "notify-events-default",
                                       IPP_TAG_KEYWORD);
      notify_lease  = ippFindAttribute(printer->attrs,
                                       "notify-lease-duration-default",
                                       IPP_TAG_INTEGER);

      if (notify_lease)
        lease = notify_lease->values[0].integer;
    }
    else
    {
      notify_events = NULL;
      notify_lease  = NULL;
    }

    while (attr && attr->group_tag != IPP_TAG_ZERO)
    {
      if (!strcmp(attr->name, "notify-recipient-uri") &&
          attr->value_tag == IPP_TAG_URI)
      {
       /*
        * Validate the recipient scheme against the ServerBin/notifier
        * directory...
        */

        char    notifier[1024];         /* Notifier filename */


        recipient = attr->values[0].string.text;

        if (httpSeparateURI(HTTP_URI_CODING_ALL, recipient,
                            scheme, sizeof(scheme), userpass, sizeof(userpass),
                            host, sizeof(host), &port,
                            resource, sizeof(resource)) < HTTP_URI_OK)
        {
          send_ipp_status(con, IPP_NOT_POSSIBLE,
                          _("Bad notify-recipient-uri \"%s\"."), recipient);
          ippAddInteger(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_ENUM,
                        "notify-status-code", IPP_URI_SCHEME);
          return;
        }

        snprintf(notifier, sizeof(notifier), "%s/notifier/%s", ServerBin,
                 scheme);
        if (access(notifier, X_OK))
        {
          send_ipp_status(con, IPP_NOT_POSSIBLE,
                          _("notify-recipient-uri URI \"%s\" uses unknown "
                            "scheme."), recipient);
          ippAddInteger(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_ENUM,
                        "notify-status-code", IPP_URI_SCHEME);
          return;
        }

        if (!strcmp(scheme, "rss") && !check_rss_recipient(recipient))
        {
          send_ipp_status(con, IPP_NOT_POSSIBLE,
                          _("notify-recipient-uri URI \"%s\" is already used."),
                          recipient);
          ippAddInteger(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_ENUM,
                        "notify-status-code", IPP_ATTRIBUTES);
          return;
        }
      }
      else if (!strcmp(attr->name, "notify-pull-method") &&
               attr->value_tag == IPP_TAG_KEYWORD)
      {
        pullmethod = attr->values[0].string.text;

        if (strcmp(pullmethod, "ippget"))
        {
          send_ipp_status(con, IPP_NOT_POSSIBLE,
                          _("Bad notify-pull-method \"%s\"."), pullmethod);
          ippAddInteger(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_ENUM,
                        "notify-status-code", IPP_ATTRIBUTES);
          return;
        }
      }
      else if (!strcmp(attr->name, "notify-charset") &&
               attr->value_tag == IPP_TAG_CHARSET &&
               strcmp(attr->values[0].string.text, "us-ascii") &&
               strcmp(attr->values[0].string.text, "utf-8"))
      {
        send_ipp_status(con, IPP_CHARSET,
                        _("Character set \"%s\" not supported."),
                        attr->values[0].string.text);
        return;
      }
      else if (!strcmp(attr->name, "notify-natural-language") &&
               (attr->value_tag != IPP_TAG_LANGUAGE ||
                strcmp(attr->values[0].string.text, DefaultLanguage)))
      {
        send_ipp_status(con, IPP_CHARSET,
                        _("Language \"%s\" not supported."),
                        attr->values[0].string.text);
        return;
      }
      else if (!strcmp(attr->name, "notify-user-data") &&
               attr->value_tag == IPP_TAG_STRING)
      {
        if (attr->num_values > 1 || attr->values[0].unknown.length > 63)
        {
          send_ipp_status(con, IPP_REQUEST_VALUE,
                          _("The notify-user-data value is too large "
                            "(%d > 63 octets)."),
                          attr->values[0].unknown.length);
          return;
        }

        user_data = attr;
      }
      else if (!strcmp(attr->name, "notify-events") &&
               attr->value_tag == IPP_TAG_KEYWORD)
        notify_events = attr;
      else if (!strcmp(attr->name, "notify-lease-duration") &&
               attr->value_tag == IPP_TAG_INTEGER)
        lease = attr->values[0].integer;
      else if (!strcmp(attr->name, "notify-time-interval") &&
               attr->value_tag == IPP_TAG_INTEGER)
        interval = attr->values[0].integer;
      else if (!strcmp(attr->name, "notify-job-id") &&
               attr->value_tag == IPP_TAG_INTEGER)
        jobid = attr->values[0].integer;

      attr = attr->next;
    }

    if (notify_events)
    {
      for (i = 0; i < notify_events->num_values; i ++)
        mask |= cupsdEventValue(notify_events->values[i].string.text);
    }

    if (recipient)
      cupsdLogMessage(CUPSD_LOG_DEBUG, "recipient=\"%s\"", recipient);
    if (pullmethod)
      cupsdLogMessage(CUPSD_LOG_DEBUG, "pullmethod=\"%s\"", pullmethod);
    cupsdLogMessage(CUPSD_LOG_DEBUG, "notify-lease-duration=%d", lease);
    cupsdLogMessage(CUPSD_LOG_DEBUG, "notify-time-interval=%d", interval);

    if (!recipient && !pullmethod)
      break;

    if (mask == CUPSD_EVENT_NONE)
    {
      if (jobid)
        mask = CUPSD_EVENT_JOB_COMPLETED;
      else if (printer)
        mask = CUPSD_EVENT_PRINTER_STATE_CHANGED;
      else
      {
        send_ipp_status(con, IPP_BAD_REQUEST,
                        _("notify-events not specified."));
        return;
      }
    }

    if (MaxLeaseDuration && (lease == 0 || lease > MaxLeaseDuration))
    {
      cupsdLogMessage(CUPSD_LOG_INFO,
                      "create_subscription: Limiting notify-lease-duration to "
                      "%d seconds.",
                      MaxLeaseDuration);
      lease = MaxLeaseDuration;
    }

    if (jobid)
    {
      if ((job = cupsdFindJob(jobid)) == NULL)
      {
        send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."),
                        jobid);
        return;
      }
    }
    else
      job = NULL;

    if ((sub = cupsdAddSubscription(mask, printer, job, recipient, 0)) == NULL)
    {
      send_ipp_status(con, IPP_TOO_MANY_SUBSCRIPTIONS,
                      _("There are too many subscriptions."));
      return;
    }

    if (job)
      cupsdLogMessage(CUPSD_LOG_DEBUG, "Added subscription #%d for job %d.",
                      sub->id, job->id);
    else if (printer)
      cupsdLogMessage(CUPSD_LOG_DEBUG,
                      "Added subscription #%d for printer \"%s\".",
                      sub->id, printer->name);
    else
      cupsdLogMessage(CUPSD_LOG_DEBUG, "Added subscription #%d for server.",
                      sub->id);

    sub->interval = interval;
    sub->lease    = lease;
    sub->expire   = lease ? time(NULL) + lease : 0;

    cupsdSetString(&sub->owner, username);

    if (user_data)
    {
      sub->user_data_len = user_data->values[0].unknown.length;
      memcpy(sub->user_data, user_data->values[0].unknown.data,
             sub->user_data_len);
    }

    ippAddSeparator(con->response);
    ippAddInteger(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_INTEGER,
                  "notify-subscription-id", sub->id);

    con->response->request.status.status_code = IPP_OK;

    if (attr)
      attr = attr->next;
  }

  cupsdMarkDirty(CUPSD_DIRTY_SUBSCRIPTIONS);
}


/*
 * 'delete_printer()' - Remove a printer or class from the system.
 */

static void
delete_printer(cupsd_client_t  *con,    /* I - Client connection */
               ipp_attribute_t *uri)    /* I - URI of printer or class */
{
  http_status_t status;                 /* Policy status */
  cups_ptype_t  dtype;                  /* Destination type (printer/class) */
  cupsd_printer_t *printer;             /* Printer/class */
  char          filename[1024];         /* Script/PPD filename */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "delete_printer(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Do we have a valid URI?
  */

  if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(DefaultPolicyPtr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, NULL);
    return;
  }

 /*
  * Remove old jobs...
  */

  cupsdCancelJobs(printer->name, NULL, 1);

 /*
  * Remove old subscriptions and send a "deleted printer" event...
  */

  cupsdAddEvent(CUPSD_EVENT_PRINTER_DELETED, printer, NULL,
                "%s \"%s\" deleted by \"%s\".",
                (dtype & CUPS_PRINTER_CLASS) ? "Class" : "Printer",
                printer->name, get_username(con));

  cupsdExpireSubscriptions(printer, NULL);

 /*
  * Remove any old PPD or script files...
  */

  snprintf(filename, sizeof(filename), "%s/interfaces/%s", ServerRoot,
           printer->name);
  unlink(filename);

  snprintf(filename, sizeof(filename), "%s/ppd/%s.ppd", ServerRoot,
           printer->name);
  unlink(filename);

  snprintf(filename, sizeof(filename), "%s/%s.png", CacheDir, printer->name);
  unlink(filename);

  snprintf(filename, sizeof(filename), "%s/%s.data", CacheDir, printer->name);
  unlink(filename);

 /*
  * Unregister color profiles...
  */

  cupsdUnregisterColor(printer);

  if (dtype & CUPS_PRINTER_CLASS)
  {
    cupsdLogMessage(CUPSD_LOG_INFO, "Class \"%s\" deleted by \"%s\".",
                    printer->name, get_username(con));

    cupsdDeletePrinter(printer, 0);
    cupsdMarkDirty(CUPSD_DIRTY_CLASSES);
  }
  else
  {
    cupsdLogMessage(CUPSD_LOG_INFO, "Printer \"%s\" deleted by \"%s\".",
                    printer->name, get_username(con));

    if (cupsdDeletePrinter(printer, 0))
      cupsdMarkDirty(CUPSD_DIRTY_CLASSES);

    cupsdMarkDirty(CUPSD_DIRTY_PRINTERS);
  }

  cupsdMarkDirty(CUPSD_DIRTY_PRINTCAP);

 /*
  * Return with no errors...
  */

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'get_default()' - Get the default destination.
 */

static void
get_default(cupsd_client_t *con)        /* I - Client connection */
{
  http_status_t status;                 /* Policy status */
  cups_array_t  *ra;                    /* Requested attributes array */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_default(%p[%d])", con, con->http.fd);

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(DefaultPolicyPtr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, NULL);
    return;
  }

  if (DefaultPrinter)
  {
    ra = create_requested_array(con->request);

    copy_printer_attrs(con, DefaultPrinter, ra);

    cupsArrayDelete(ra);

    con->response->request.status.status_code = IPP_OK;
  }
  else
    send_ipp_status(con, IPP_NOT_FOUND, _("No default printer."));
}


/*
 * 'get_devices()' - Get the list of available devices on the local system.
 */

static void
get_devices(cupsd_client_t *con)        /* I - Client connection */
{
  http_status_t         status;         /* Policy status */
  ipp_attribute_t       *limit,         /* limit attribute */
                        *timeout,       /* timeout attribute */
                        *requested,     /* requested-attributes attribute */
                        *exclude,       /* exclude-schemes attribute */
                        *include;       /* include-schemes attribute */
  char                  command[1024],  /* cups-deviced command */
                        options[2048],  /* Options to pass to command */
                        requested_str[256],
                                        /* String for requested attributes */
                        exclude_str[512],
                                        /* String for excluded schemes */
                        include_str[512];
                                        /* String for included schemes */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_devices(%p[%d])", con, con->http.fd);

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(DefaultPolicyPtr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, NULL);
    return;
  }

 /*
  * Run cups-deviced command with the given options...
  */

  limit     = ippFindAttribute(con->request, "limit", IPP_TAG_INTEGER);
  timeout   = ippFindAttribute(con->request, "timeout", IPP_TAG_INTEGER);
  requested = ippFindAttribute(con->request, "requested-attributes",
                               IPP_TAG_KEYWORD);
  exclude   = ippFindAttribute(con->request, "exclude-schemes", IPP_TAG_NAME);
  include   = ippFindAttribute(con->request, "include-schemes", IPP_TAG_NAME);

  if (requested)
    url_encode_attr(requested, requested_str, sizeof(requested_str));
  else
    strlcpy(requested_str, "requested-attributes=all", sizeof(requested_str));

  if (exclude)
    url_encode_attr(exclude, exclude_str, sizeof(exclude_str));
  else
    exclude_str[0] = '\0';

  if (include)
    url_encode_attr(include, include_str, sizeof(include_str));
  else
    include_str[0] = '\0';

  snprintf(command, sizeof(command), "%s/daemon/cups-deviced", ServerBin);
  snprintf(options, sizeof(options),
           "%d+%d+%d+%d+%s%s%s%s%s",
           con->request->request.op.request_id,
           limit ? limit->values[0].integer : 0,
           timeout ? timeout->values[0].integer : 15,
           (int)User,
           requested_str,
           exclude_str[0] ? "%20" : "", exclude_str,
           include_str[0] ? "%20" : "", include_str);

  if (cupsdSendCommand(con, command, options, 1))
  {
   /*
    * Command started successfully, don't send an IPP response here...
    */

    ippDelete(con->response);
    con->response = NULL;
  }
  else
  {
   /*
    * Command failed, return "internal error" so the user knows something
    * went wrong...
    */

    send_ipp_status(con, IPP_INTERNAL_ERROR,
                    _("cups-deviced failed to execute."));
  }
}


/*
 * 'get_document()' - Get a copy of a job file.
 */

static void
get_document(cupsd_client_t  *con,      /* I - Client connection */
             ipp_attribute_t *uri)      /* I - Job URI */
{
  http_status_t status;                 /* Policy status */
  ipp_attribute_t *attr;                /* Current attribute */
  int           jobid;                  /* Job ID */
  int           docnum;                 /* Document number */
  cupsd_job_t   *job;                   /* Current job */
  char          scheme[HTTP_MAX_URI],   /* Method portion of URI */
                username[HTTP_MAX_URI], /* Username portion of URI */
                host[HTTP_MAX_URI],     /* Host portion of URI */
                resource[HTTP_MAX_URI]; /* Resource portion of URI */
  int           port;                   /* Port portion of URI */
  char          filename[1024],         /* Filename for document */
                format[1024];           /* Format for document */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_document(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * See if we have a job URI or a printer URI...
  */

  if (!strcmp(uri->name, "printer-uri"))
  {
   /*
    * Got a printer URI; see if we also have a job-id attribute...
    */

    if ((attr = ippFindAttribute(con->request, "job-id",
                                 IPP_TAG_INTEGER)) == NULL)
    {
      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Got a printer-uri attribute but no job-id."));
      return;
    }

    jobid = attr->values[0].integer;
  }
  else
  {
   /*
    * Got a job URI; parse it to get the job ID...
    */

    httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text, scheme,
                    sizeof(scheme), username, sizeof(username), host,
                    sizeof(host), &port, resource, sizeof(resource));

    if (strncmp(resource, "/jobs/", 6))
    {
     /*
      * Not a valid URI!
      */

      send_ipp_status(con, IPP_BAD_REQUEST, _("Bad job-uri \"%s\"."),
                      uri->values[0].string.text);
      return;
    }

    jobid = atoi(resource + 6);
  }

 /*
  * See if the job exists...
  */

  if ((job = cupsdFindJob(jobid)) == NULL)
  {
   /*
    * Nope - return a "not found" error...
    */

    send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."), jobid);
    return;
  }

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(DefaultPolicyPtr, con,
                                 job->username)) != HTTP_OK)
  {
    send_http_error(con, status, NULL);
    return;
  }

 /*
  * Get the document number...
  */

  if ((attr = ippFindAttribute(con->request, "document-number",
                               IPP_TAG_INTEGER)) == NULL)
  {
    send_ipp_status(con, IPP_BAD_REQUEST,
                    _("Missing document-number attribute."));
    return;
  }

  if ((docnum = attr->values[0].integer) < 1 || docnum > job->num_files ||
      attr->num_values > 1)
  {
    send_ipp_status(con, IPP_NOT_FOUND,
                    _("Document #%d does not exist in job #%d."), docnum,
                    jobid);
    return;
  }

  snprintf(filename, sizeof(filename), "%s/d%05d-%03d", RequestRoot, jobid,
           docnum);
  if ((con->file = open(filename, O_RDONLY)) == -1)
  {
    cupsdLogMessage(CUPSD_LOG_ERROR,
                    "Unable to open document %d in job %d - %s", docnum, jobid,
                    strerror(errno));
    send_ipp_status(con, IPP_NOT_FOUND,
                    _("Unable to open document #%d in job #%d."), docnum,
                    jobid);
    return;
  }

  fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);

  cupsdLoadJob(job);

  snprintf(format, sizeof(format), "%s/%s", job->filetypes[docnum - 1]->super,
           job->filetypes[docnum - 1]->type);

  ippAddString(con->response, IPP_TAG_JOB, IPP_TAG_MIMETYPE, "document-format",
               NULL, format);
  ippAddInteger(con->response, IPP_TAG_JOB, IPP_TAG_INTEGER, "document-number",
                docnum);
  if ((attr = ippFindAttribute(job->attrs, "document-name",
                               IPP_TAG_NAME)) != NULL)
    ippAddString(con->response, IPP_TAG_JOB, IPP_TAG_NAME, "document-name",
                 NULL, attr->values[0].string.text);
}


/*
 * 'get_job_attrs()' - Get job attributes.
 */

static void
get_job_attrs(cupsd_client_t  *con,     /* I - Client connection */
              ipp_attribute_t *uri)     /* I - Job URI */
{
  http_status_t status;                 /* Policy status */
  ipp_attribute_t *attr;                /* Current attribute */
  int           jobid;                  /* Job ID */
  cupsd_job_t   *job;                   /* Current job */
  cupsd_printer_t *printer;             /* Current printer */
  cupsd_policy_t *policy;               /* Current security policy */
  char          scheme[HTTP_MAX_URI],   /* Scheme portion of URI */
                username[HTTP_MAX_URI], /* Username portion of URI */
                host[HTTP_MAX_URI],     /* Host portion of URI */
                resource[HTTP_MAX_URI]; /* Resource portion of URI */
  int           port;                   /* Port portion of URI */
  cups_array_t  *ra,                    /* Requested attributes array */
                *exclude;               /* Private attributes array */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_job_attrs(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * See if we have a job URI or a printer URI...
  */

  if (!strcmp(uri->name, "printer-uri"))
  {
   /*
    * Got a printer URI; see if we also have a job-id attribute...
    */

    if ((attr = ippFindAttribute(con->request, "job-id",
                                 IPP_TAG_INTEGER)) == NULL)
    {
      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Got a printer-uri attribute but no job-id."));
      return;
    }

    jobid = attr->values[0].integer;
  }
  else
  {
   /*
    * Got a job URI; parse it to get the job ID...
    */

    httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text, scheme,
                    sizeof(scheme), username, sizeof(username), host,
                    sizeof(host), &port, resource, sizeof(resource));

    if (strncmp(resource, "/jobs/", 6))
    {
     /*
      * Not a valid URI!
      */

      send_ipp_status(con, IPP_BAD_REQUEST, _("Bad job-uri \"%s\"."),
                      uri->values[0].string.text);
      return;
    }

    jobid = atoi(resource + 6);
  }

 /*
  * See if the job exists...
  */

  if ((job = cupsdFindJob(jobid)) == NULL)
  {
   /*
    * Nope - return a "not found" error...
    */

    send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."), jobid);
    return;
  }

 /*
  * Check policy...
  */

  if ((printer = job->printer) == NULL)
    printer = cupsdFindDest(job->dest);

  if (printer)
    policy = printer->op_policy_ptr;
  else
    policy = DefaultPolicyPtr;

  if ((status = cupsdCheckPolicy(policy, con, job->username)) != HTTP_OK)
  {
    send_http_error(con, status, NULL);
    return;
  }

  exclude = cupsdGetPrivateAttrs(policy, con, printer, job->username);

 /*
  * Copy attributes...
  */

  cupsdLoadJob(job);

  ra = create_requested_array(con->request);
  copy_job_attrs(con, job, ra, exclude);
  cupsArrayDelete(ra);

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'get_jobs()' - Get a list of jobs for the specified printer.
 */

static void
get_jobs(cupsd_client_t  *con,          /* I - Client connection */
         ipp_attribute_t *uri)          /* I - Printer URI */
{
  http_status_t status;                 /* Policy status */
  ipp_attribute_t *attr;                /* Current attribute */
  const char    *dest;                  /* Destination */
  cups_ptype_t  dtype;                  /* Destination type (printer/class) */
  cups_ptype_t  dmask;                  /* Destination type mask */
  char          scheme[HTTP_MAX_URI],   /* Scheme portion of URI */
                username[HTTP_MAX_URI], /* Username portion of URI */
                host[HTTP_MAX_URI],     /* Host portion of URI */
                resource[HTTP_MAX_URI]; /* Resource portion of URI */
  int           port;                   /* Port portion of URI */
  int           job_comparison;         /* Job comparison */
  ipp_jstate_t  job_state;              /* job-state value */
  int           first_job_id;           /* First job ID */
  int           limit;                  /* Maximum number of jobs to return */
  int           count;                  /* Number of jobs that match */
  ipp_attribute_t *job_ids;             /* job-ids attribute */
  cupsd_job_t   *job;                   /* Current job pointer */
  cupsd_printer_t *printer;             /* Printer */
  cups_array_t  *list;                  /* Which job list... */
  cups_array_t  *ra,                    /* Requested attributes array */
                *exclude;               /* Private attributes array */
  cupsd_policy_t *policy;               /* Current policy */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_jobs(%p[%d], %s)", con, con->http.fd,
                  uri->values[0].string.text);

 /*
  * Is the destination valid?
  */

  if (strcmp(uri->name, "printer-uri"))
  {
    send_ipp_status(con, IPP_BAD_REQUEST, _("No printer-uri in request."));
    return;
  }

  httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text, scheme,
                  sizeof(scheme), username, sizeof(username), host,
                  sizeof(host), &port, resource, sizeof(resource));

  if (!strcmp(resource, "/") || !strcmp(resource, "/jobs"))
  {
    dest    = NULL;
    dtype   = (cups_ptype_t)0;
    dmask   = (cups_ptype_t)0;
    printer = NULL;
  }
  else if (!strncmp(resource, "/printers", 9) && strlen(resource) <= 10)
  {
    dest    = NULL;
    dtype   = (cups_ptype_t)0;
    dmask   = CUPS_PRINTER_CLASS;
    printer = NULL;
  }
  else if (!strncmp(resource, "/classes", 8) && strlen(resource) <= 9)
  {
    dest    = NULL;
    dtype   = CUPS_PRINTER_CLASS;
    dmask   = CUPS_PRINTER_CLASS;
    printer = NULL;
  }
  else if ((dest = cupsdValidateDest(uri->values[0].string.text, &dtype,
                                     &printer)) == NULL)
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }
  else
  {
    dtype &= CUPS_PRINTER_CLASS;
    dmask = CUPS_PRINTER_CLASS;
  }

 /*
  * Check policy...
  */

  if (printer)
    policy = printer->op_policy_ptr;
  else
    policy = DefaultPolicyPtr;

  if ((status = cupsdCheckPolicy(policy, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, NULL);
    return;
  }

  job_ids = ippFindAttribute(con->request, "job-ids", IPP_TAG_INTEGER);

 /*
  * See if the "which-jobs" attribute have been specified...
  */

  if ((attr = ippFindAttribute(con->request, "which-jobs",
                               IPP_TAG_KEYWORD)) != NULL && job_ids)
  {
    send_ipp_status(con, IPP_CONFLICT,
                    _("The %s attribute cannot be provided with job-ids."),
                    "which-jobs");
    return;
  }
  else if (!attr || !strcmp(attr->values[0].string.text, "not-completed"))
  {
    job_comparison = -1;
    job_state      = IPP_JOB_STOPPED;
    list           = Jobs;
  }
  else if (!strcmp(attr->values[0].string.text, "completed"))
  {
    job_comparison = 1;
    job_state      = IPP_JOB_CANCELED;
    list           = Jobs;
  }
  else if (!strcmp(attr->values[0].string.text, "aborted"))
  {
    job_comparison = 0;
    job_state      = IPP_JOB_ABORTED;
    list           = Jobs;
  }
  else if (!strcmp(attr->values[0].string.text, "all"))
  {
    job_comparison = 1;
    job_state      = IPP_JOB_PENDING;
    list           = Jobs;
  }
  else if (!strcmp(attr->values[0].string.text, "canceled"))
  {
    job_comparison = 0;
    job_state      = IPP_JOB_CANCELED;
    list           = Jobs;
  }
  else if (!strcmp(attr->values[0].string.text, "pending"))
  {
    job_comparison = 0;
    job_state      = IPP_JOB_PENDING;
    list           = ActiveJobs;
  }
  else if (!strcmp(attr->values[0].string.text, "pending-held"))
  {
    job_comparison = 0;
    job_state      = IPP_JOB_HELD;
    list           = ActiveJobs;
  }
  else if (!strcmp(attr->values[0].string.text, "processing"))
  {
    job_comparison = 0;
    job_state      = IPP_JOB_PROCESSING;
    list           = PrintingJobs;
  }
  else if (!strcmp(attr->values[0].string.text, "processing-stopped"))
  {
    job_comparison = 0;
    job_state      = IPP_JOB_STOPPED;
    list           = ActiveJobs;
  }
  else
  {
    send_ipp_status(con, IPP_ATTRIBUTES,
                    _("The which-jobs value \"%s\" is not supported."),
                    attr->values[0].string.text);
    ippAddString(con->response, IPP_TAG_UNSUPPORTED_GROUP, IPP_TAG_KEYWORD,
                 "which-jobs", NULL, attr->values[0].string.text);
    return;
  }

 /*
  * See if they want to limit the number of jobs reported...
  */

  if ((attr = ippFindAttribute(con->request, "limit",
                               IPP_TAG_INTEGER)) != NULL)
  {
    if (job_ids)
    {
      send_ipp_status(con, IPP_CONFLICT,
                      _("The %s attribute cannot be provided with job-ids."),
                      "limit");
      return;
    }

    limit = attr->values[0].integer;
  }
  else
    limit = 0;

  if ((attr = ippFindAttribute(con->request, "first-job-id",
                               IPP_TAG_INTEGER)) != NULL)
  {
    if (job_ids)
    {
      send_ipp_status(con, IPP_CONFLICT,
                      _("The %s attribute cannot be provided with job-ids."),
                      "first-job-id");
      return;
    }

    first_job_id = attr->values[0].integer;
  }
  else
    first_job_id = 1;

 /*
  * See if we only want to see jobs for a specific user...
  */

  if ((attr = ippFindAttribute(con->request, "my-jobs",
                               IPP_TAG_BOOLEAN)) != NULL && job_ids)
  {
    send_ipp_status(con, IPP_CONFLICT,
                    _("The %s attribute cannot be provided with job-ids."),
                    "my-jobs");
    return;
  }
  else if (attr && attr->values[0].boolean)
    strlcpy(username, get_username(con), sizeof(username));
  else
    username[0] = '\0';

  if ((ra = create_requested_array(con->request)) == NULL &&
      !ippFindAttribute(con->request, "requested-attributes", IPP_TAG_KEYWORD))
  {
   /*
    * IPP conformance - Get-Jobs has a default requested-attributes value of
    * "job-id" and "job-uri".
    */

    ra = cupsArrayNew((cups_array_func_t)strcmp, NULL);
    cupsArrayAdd(ra, "job-id");
    cupsArrayAdd(ra, "job-uri");
  }

 /*
  * OK, build a list of jobs for this printer...
  */

  if (job_ids)
  {
    int i;                              /* Looping var */

    for (i = 0; i < job_ids->num_values; i ++)
    {
      if (!cupsdFindJob(job_ids->values[i].integer))
        break;
    }

    if (i < job_ids->num_values)
    {
      send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."),
                      job_ids->values[i].integer);
      return;
    }

    for (i = 0; i < job_ids->num_values; i ++)
    {
      job = cupsdFindJob(job_ids->values[i].integer);

      cupsdLoadJob(job);

      if (!job->attrs)
      {
        cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_jobs: No attributes for job %d",
                        job->id);
        continue;
      }

      if (i > 0)
        ippAddSeparator(con->response);

      exclude = cupsdGetPrivateAttrs(job->printer ?
                                         job->printer->op_policy_ptr :
                                         policy, con, job->printer,
                                         job->username);

      copy_job_attrs(con, job, ra, exclude);
    }
  }
  else
  {
    for (count = 0, job = (cupsd_job_t *)cupsArrayFirst(list);
         (limit <= 0 || count < limit) && job;
         job = (cupsd_job_t *)cupsArrayNext(list))
    {
     /*
      * Filter out jobs that don't match...
      */

      cupsdLogMessage(CUPSD_LOG_DEBUG2,
                      "get_jobs: job->id=%d, dest=\"%s\", username=\"%s\", "
                      "state_value=%d, attrs=%p", job->id, job->dest,
                      job->username, job->state_value, job->attrs);

      if (!job->dest || !job->username)
        cupsdLoadJob(job);

      if (!job->dest || !job->username)
        continue;

      if ((dest && strcmp(job->dest, dest)) &&
          (!job->printer || !dest || strcmp(job->printer->name, dest)))
        continue;
      if ((job->dtype & dmask) != dtype &&
          (!job->printer || (job->printer->type & dmask) != dtype))
        continue;

      if ((job_comparison < 0 && job->state_value > job_state) ||
          (job_comparison == 0 && job->state_value != job_state) ||
          (job_comparison > 0 && job->state_value < job_state))
        continue;

      if (job->id < first_job_id)
        continue;

      cupsdLoadJob(job);

      if (!job->attrs)
      {
        cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_jobs: No attributes for job %d",
                        job->id);
        continue;
      }

      if (username[0] && _cups_strcasecmp(username, job->username))
        continue;

      if (count > 0)
        ippAddSeparator(con->response);

      count ++;

      exclude = cupsdGetPrivateAttrs(job->printer ?
                                         job->printer->op_policy_ptr :
                                         policy, con, job->printer,
                                         job->username);

      copy_job_attrs(con, job, ra, exclude);
    }

    cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_jobs: count=%d", count);
  }

  cupsArrayDelete(ra);

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'get_notifications()' - Get events for a subscription.
 */

static void
get_notifications(cupsd_client_t *con)  /* I - Client connection */
{
  int                   i, j;           /* Looping vars */
  http_status_t         status;         /* Policy status */
  cupsd_subscription_t  *sub;           /* Subscription */
  ipp_attribute_t       *ids,           /* notify-subscription-ids */
                        *sequences;     /* notify-sequence-numbers */
  int                   min_seq;        /* Minimum sequence number */
  int                   interval;       /* Poll interval */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_notifications(con=%p[%d])",
                  con, con->http.fd);

 /*
  * Get subscription attributes...
  */

  ids       = ippFindAttribute(con->request, "notify-subscription-ids",
                               IPP_TAG_INTEGER);
  sequences = ippFindAttribute(con->request, "notify-sequence-numbers",
                               IPP_TAG_INTEGER);

  if (!ids)
  {
    send_ipp_status(con, IPP_BAD_REQUEST,
                    _("Missing notify-subscription-ids attribute."));
    return;
  }

 /*
  * Are the subscription IDs valid?
  */

  for (i = 0, interval = 60; i < ids->num_values; i ++)
  {
    if ((sub = cupsdFindSubscription(ids->values[i].integer)) == NULL)
    {
     /*
      * Bad subscription ID...
      */

      send_ipp_status(con, IPP_NOT_FOUND, _("Subscription #%d does not exist."),
                      ids->values[i].integer);
      return;
    }

   /*
    * Check policy...
    */

    if ((status = cupsdCheckPolicy(sub->dest ? sub->dest->op_policy_ptr :
                                               DefaultPolicyPtr,
                                   con, sub->owner)) != HTTP_OK)
    {
      send_http_error(con, status, sub->dest);
      return;
    }

   /*
    * Check the subscription type and update the interval accordingly.
    */

    if (sub->job && sub->job->state_value == IPP_JOB_PROCESSING &&
        interval > 10)
      interval = 10;
    else if (sub->job && sub->job->state_value >= IPP_JOB_STOPPED)
      interval = 0;
    else if (sub->dest && sub->dest->state == IPP_PRINTER_PROCESSING &&
             interval > 30)
      interval = 30;
  }

 /*
  * Tell the client to poll again in N seconds...
  */

  if (interval > 0)
    ippAddInteger(con->response, IPP_TAG_OPERATION, IPP_TAG_INTEGER,
                  "notify-get-interval", interval);

  ippAddInteger(con->response, IPP_TAG_OPERATION, IPP_TAG_INTEGER,
                "printer-up-time", time(NULL));

 /*
  * Copy the subscription event attributes to the response.
  */

  con->response->request.status.status_code =
      interval ? IPP_OK : IPP_OK_EVENTS_COMPLETE;

  for (i = 0; i < ids->num_values; i ++)
  {
   /*
    * Get the subscription and sequence number...
    */

    sub = cupsdFindSubscription(ids->values[i].integer);

    if (sequences && i < sequences->num_values)
      min_seq = sequences->values[i].integer;
    else
      min_seq = 1;

   /*
    * If we don't have any new events, nothing to do here...
    */

    if (min_seq > (sub->first_event_id + cupsArrayCount(sub->events)))
      continue;

   /*
    * Otherwise copy all of the new events...
    */

    if (sub->first_event_id > min_seq)
      j = 0;
    else
      j = min_seq - sub->first_event_id;

    for (; j < cupsArrayCount(sub->events); j ++)
    {
      ippAddSeparator(con->response);

      copy_attrs(con->response,
                 ((cupsd_event_t *)cupsArrayIndex(sub->events, j))->attrs, NULL,
                 IPP_TAG_EVENT_NOTIFICATION, 0, NULL);
    }
  }
}


/*
 * 'get_ppd()' - Get a named PPD from the local system.
 */

static void
get_ppd(cupsd_client_t  *con,           /* I - Client connection */
        ipp_attribute_t *uri)           /* I - Printer URI or PPD name */
{
  http_status_t         status;         /* Policy status */
  cupsd_printer_t       *dest;          /* Destination */
  cups_ptype_t          dtype;          /* Destination type */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_ppd(%p[%d], %p[%s=%s])", con,
                  con->http.fd, uri, uri->name, uri->values[0].string.text);

  if (!strcmp(uri->name, "ppd-name"))
  {
   /*
    * Return a PPD file from cups-driverd...
    */

    char        command[1024],  /* cups-driverd command */
                options[1024],  /* Options to pass to command */
                ppd_name[1024]; /* ppd-name */


   /*
    * Check policy...
    */

    if ((status = cupsdCheckPolicy(DefaultPolicyPtr, con, NULL)) != HTTP_OK)
    {
      send_http_error(con, status, NULL);
      return;
    }

   /*
    * Run cups-driverd command with the given options...
    */

    snprintf(command, sizeof(command), "%s/daemon/cups-driverd", ServerBin);
    url_encode_string(uri->values[0].string.text, ppd_name, sizeof(ppd_name));
    snprintf(options, sizeof(options), "get+%d+%s",
             con->request->request.op.request_id, ppd_name);

    if (cupsdSendCommand(con, command, options, 0))
    {
     /*
      * Command started successfully, don't send an IPP response here...
      */

      ippDelete(con->response);
      con->response = NULL;
    }
    else
    {
     /*
      * Command failed, return "internal error" so the user knows something
      * went wrong...
      */

      send_ipp_status(con, IPP_INTERNAL_ERROR,
                      _("cups-driverd failed to execute."));
    }
  }
  else if (!strcmp(uri->name, "printer-uri") &&
           cupsdValidateDest(uri->values[0].string.text, &dtype, &dest))
  {
    int         i;                      /* Looping var */
    char        filename[1024];         /* PPD filename */


   /*
    * Check policy...
    */

    if ((status = cupsdCheckPolicy(dest->op_policy_ptr, con, NULL)) != HTTP_OK)
    {
      send_http_error(con, status, dest);
      return;
    }

   /*
    * See if we need the PPD for a class or remote printer...
    */

    snprintf(filename, sizeof(filename), "%s/ppd/%s.ppd", ServerRoot,
             dest->name);

    if ((dtype & CUPS_PRINTER_REMOTE) && access(filename, 0))
    {
      con->response->request.status.status_code = CUPS_SEE_OTHER;
      ippAddString(con->response, IPP_TAG_OPERATION, IPP_TAG_URI,
                   "printer-uri", NULL, dest->uri);
      return;
    }
    else if (dtype & CUPS_PRINTER_CLASS)
    {
      for (i = 0; i < dest->num_printers; i ++)
        if (!(dest->printers[i]->type & CUPS_PRINTER_CLASS))
        {
          snprintf(filename, sizeof(filename), "%s/ppd/%s.ppd", ServerRoot,
                   dest->printers[i]->name);

          if (!access(filename, 0))
            break;
        }

      if (i < dest->num_printers)
        dest = dest->printers[i];
      else
      {
        con->response->request.status.status_code = CUPS_SEE_OTHER;
        ippAddString(con->response, IPP_TAG_OPERATION, IPP_TAG_URI,
                     "printer-uri", NULL, dest->printers[0]->uri);
        return;
      }
    }

   /*
    * Found the printer with the PPD file, now see if there is one...
    */

    if ((con->file = open(filename, O_RDONLY)) < 0)
    {
      send_ipp_status(con, IPP_NOT_FOUND,
                      _("The PPD file \"%s\" could not be opened: %s"),
                      uri->values[0].string.text, strerror(errno));
      return;
    }

    fcntl(con->file, F_SETFD, fcntl(con->file, F_GETFD) | FD_CLOEXEC);

    con->pipe_pid = 0;

    con->response->request.status.status_code = IPP_OK;
  }
  else
    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The PPD file \"%s\" could not be found."),
                    uri->values[0].string.text);
}


/*
 * 'get_ppds()' - Get the list of PPD files on the local system.
 */

static void
get_ppds(cupsd_client_t *con)           /* I - Client connection */
{
  http_status_t         status;         /* Policy status */
  ipp_attribute_t       *limit,         /* Limit attribute */
                        *device,        /* ppd-device-id attribute */
                        *language,      /* ppd-natural-language attribute */
                        *make,          /* ppd-make attribute */
                        *model,         /* ppd-make-and-model attribute */
                        *model_number,  /* ppd-model-number attribute */
                        *product,       /* ppd-product attribute */
                        *psversion,     /* ppd-psverion attribute */
                        *type,          /* ppd-type attribute */
                        *requested,     /* requested-attributes attribute */
                        *exclude,       /* exclude-schemes attribute */
                        *include;       /* include-schemes attribute */
  char                  command[1024],  /* cups-driverd command */
                        options[4096],  /* Options to pass to command */
                        device_str[256],/* Escaped ppd-device-id string */
                        language_str[256],
                                        /* Escaped ppd-natural-language */
                        make_str[256],  /* Escaped ppd-make string */
                        model_str[256], /* Escaped ppd-make-and-model string */
                        model_number_str[256],
                                        /* ppd-model-number string */
                        product_str[256],
                                        /* Escaped ppd-product string */
                        psversion_str[256],
                                        /* Escaped ppd-psversion string */
                        type_str[256],  /* Escaped ppd-type string */
                        requested_str[256],
                                        /* String for requested attributes */
                        exclude_str[512],
                                        /* String for excluded schemes */
                        include_str[512];
                                        /* String for included schemes */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_ppds(%p[%d])", con, con->http.fd);

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(DefaultPolicyPtr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, NULL);
    return;
  }

 /*
  * Run cups-driverd command with the given options...
  */

  limit        = ippFindAttribute(con->request, "limit", IPP_TAG_INTEGER);
  device       = ippFindAttribute(con->request, "ppd-device-id", IPP_TAG_TEXT);
  language     = ippFindAttribute(con->request, "ppd-natural-language",
                                  IPP_TAG_LANGUAGE);
  make         = ippFindAttribute(con->request, "ppd-make", IPP_TAG_TEXT);
  model        = ippFindAttribute(con->request, "ppd-make-and-model",
                                  IPP_TAG_TEXT);
  model_number = ippFindAttribute(con->request, "ppd-model-number",
                                  IPP_TAG_INTEGER);
  product      = ippFindAttribute(con->request, "ppd-product", IPP_TAG_TEXT);
  psversion    = ippFindAttribute(con->request, "ppd-psversion", IPP_TAG_TEXT);
  type         = ippFindAttribute(con->request, "ppd-type", IPP_TAG_KEYWORD);
  requested    = ippFindAttribute(con->request, "requested-attributes",
                                  IPP_TAG_KEYWORD);
  exclude      = ippFindAttribute(con->request, "exclude-schemes",
                                  IPP_TAG_NAME);
  include      = ippFindAttribute(con->request, "include-schemes",
                                  IPP_TAG_NAME);

  if (requested)
    url_encode_attr(requested, requested_str, sizeof(requested_str));
  else
    strlcpy(requested_str, "requested-attributes=all", sizeof(requested_str));

  if (device)
    url_encode_attr(device, device_str, sizeof(device_str));
  else
    device_str[0] = '\0';

  if (language)
    url_encode_attr(language, language_str, sizeof(language_str));
  else
    language_str[0] = '\0';

  if (make)
    url_encode_attr(make, make_str, sizeof(make_str));
  else
    make_str[0] = '\0';

  if (model)
    url_encode_attr(model, model_str, sizeof(model_str));
  else
    model_str[0] = '\0';

  if (model_number)
    snprintf(model_number_str, sizeof(model_number_str), "ppd-model-number=%d",
             model_number->values[0].integer);
  else
    model_number_str[0] = '\0';

  if (product)
    url_encode_attr(product, product_str, sizeof(product_str));
  else
    product_str[0] = '\0';

  if (psversion)
    url_encode_attr(psversion, psversion_str, sizeof(psversion_str));
  else
    psversion_str[0] = '\0';

  if (type)
    url_encode_attr(type, type_str, sizeof(type_str));
  else
    type_str[0] = '\0';

  if (exclude)
    url_encode_attr(exclude, exclude_str, sizeof(exclude_str));
  else
    exclude_str[0] = '\0';

  if (include)
    url_encode_attr(include, include_str, sizeof(include_str));
  else
    include_str[0] = '\0';

  snprintf(command, sizeof(command), "%s/daemon/cups-driverd", ServerBin);
  snprintf(options, sizeof(options),
           "list+%d+%d+%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
           con->request->request.op.request_id,
           limit ? limit->values[0].integer : 0,
           requested_str,
           device ? "%20" : "", device_str,
           language ? "%20" : "", language_str,
           make ? "%20" : "", make_str,
           model ? "%20" : "", model_str,
           model_number ? "%20" : "", model_number_str,
           product ? "%20" : "", product_str,
           psversion ? "%20" : "", psversion_str,
           type ? "%20" : "", type_str,
           exclude_str[0] ? "%20" : "", exclude_str,
           include_str[0] ? "%20" : "", include_str);

  if (cupsdSendCommand(con, command, options, 0))
  {
   /*
    * Command started successfully, don't send an IPP response here...
    */

    ippDelete(con->response);
    con->response = NULL;
  }
  else
  {
   /*
    * Command failed, return "internal error" so the user knows something
    * went wrong...
    */

    send_ipp_status(con, IPP_INTERNAL_ERROR,
                    _("cups-driverd failed to execute."));
  }
}


/*
 * 'get_printer_attrs()' - Get printer attributes.
 */

static void
get_printer_attrs(cupsd_client_t  *con, /* I - Client connection */
                  ipp_attribute_t *uri) /* I - Printer URI */
{
  http_status_t         status;         /* Policy status */
  cups_ptype_t          dtype;          /* Destination type (printer/class) */
  cupsd_printer_t       *printer;       /* Printer/class */
  cups_array_t          *ra;            /* Requested attributes array */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_printer_attrs(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Is the destination valid?
  */

  if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(printer->op_policy_ptr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, printer);
    return;
  }

 /*
  * Send the attributes...
  */

  ra = create_requested_array(con->request);

  copy_printer_attrs(con, printer, ra);

  cupsArrayDelete(ra);

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'get_printer_supported()' - Get printer supported values.
 */

static void
get_printer_supported(
    cupsd_client_t  *con,               /* I - Client connection */
    ipp_attribute_t *uri)               /* I - Printer URI */
{
  http_status_t         status;         /* Policy status */
  cups_ptype_t          dtype;          /* Destination type (printer/class) */
  cupsd_printer_t       *printer;       /* Printer/class */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_printer_supported(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Is the destination valid?
  */

  if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(printer->op_policy_ptr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, printer);
    return;
  }

 /*
  * Return a list of attributes that can be set via Set-Printer-Attributes.
  */

  ippAddInteger(con->response, IPP_TAG_PRINTER, IPP_TAG_ADMINDEFINE,
                "printer-info", 0);
  ippAddInteger(con->response, IPP_TAG_PRINTER, IPP_TAG_ADMINDEFINE,
                "printer-location", 0);

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'get_printers()' - Get a list of printers or classes.
 */

static void
get_printers(cupsd_client_t *con,       /* I - Client connection */
             int            type)       /* I - 0 or CUPS_PRINTER_CLASS */
{
  http_status_t status;                 /* Policy status */
  ipp_attribute_t *attr;                /* Current attribute */
  int           limit;                  /* Max number of printers to return */
  int           count;                  /* Number of printers that match */
  cupsd_printer_t *printer;             /* Current printer pointer */
  int           printer_type,           /* printer-type attribute */
                printer_mask;           /* printer-type-mask attribute */
  char          *location;              /* Location string */
  const char    *username;              /* Current user */
  char          *first_printer_name;    /* first-printer-name attribute */
  cups_array_t  *ra;                    /* Requested attributes array */
  int           local;                  /* Local connection? */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "get_printers(%p[%d], %x)", con,
                  con->http.fd, type);

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(DefaultPolicyPtr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, NULL);
    return;
  }

 /*
  * Check for printers...
  */

  if (!Printers || !cupsArrayCount(Printers))
  {
    send_ipp_status(con, IPP_NOT_FOUND, _("No destinations added."));
    return;
  }

 /*
  * See if they want to limit the number of printers reported...
  */

  if ((attr = ippFindAttribute(con->request, "limit",
                               IPP_TAG_INTEGER)) != NULL)
    limit = attr->values[0].integer;
  else
    limit = 10000000;

  if ((attr = ippFindAttribute(con->request, "first-printer-name",
                               IPP_TAG_NAME)) != NULL)
    first_printer_name = attr->values[0].string.text;
  else
    first_printer_name = NULL;

 /*
  * Support filtering...
  */

  if ((attr = ippFindAttribute(con->request, "printer-type",
                               IPP_TAG_ENUM)) != NULL)
    printer_type = attr->values[0].integer;
  else
    printer_type = 0;

  if ((attr = ippFindAttribute(con->request, "printer-type-mask",
                               IPP_TAG_ENUM)) != NULL)
    printer_mask = attr->values[0].integer;
  else
    printer_mask = 0;

  local = httpAddrLocalhost(&(con->clientaddr));

  if ((attr = ippFindAttribute(con->request, "printer-location",
                               IPP_TAG_TEXT)) != NULL)
    location = attr->values[0].string.text;
  else
    location = NULL;

  if (con->username[0])
    username = con->username;
  else if ((attr = ippFindAttribute(con->request, "requesting-user-name",
                                    IPP_TAG_NAME)) != NULL)
    username = attr->values[0].string.text;
  else
    username = NULL;

  ra = create_requested_array(con->request);

 /*
  * OK, build a list of printers for this printer...
  */

  if (first_printer_name)
  {
    if ((printer = cupsdFindDest(first_printer_name)) == NULL)
      printer = (cupsd_printer_t *)cupsArrayFirst(Printers);
  }
  else
    printer = (cupsd_printer_t *)cupsArrayFirst(Printers);

  for (count = 0;
       count < limit && printer;
       printer = (cupsd_printer_t *)cupsArrayNext(Printers))
  {
    if (!local && !printer->shared)
      continue;

    if ((!type || (printer->type & CUPS_PRINTER_CLASS) == type) &&
        (printer->type & printer_mask) == printer_type &&
        (!location ||
         (printer->location && !_cups_strcasecmp(printer->location, location))))
    {
     /*
      * If a username is specified, see if it is allowed or denied
      * access...
      */

      if (cupsArrayCount(printer->users) && username &&
          !user_allowed(printer, username))
        continue;

     /*
      * Add the group separator as needed...
      */

      if (count > 0)
        ippAddSeparator(con->response);

      count ++;

     /*
      * Send the attributes...
      */

      copy_printer_attrs(con, printer, ra);
    }
  }

  cupsArrayDelete(ra);

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'get_subscription_attrs()' - Get subscription attributes.
 */

static void
get_subscription_attrs(
    cupsd_client_t *con,                /* I - Client connection */
    int            sub_id)              /* I - Subscription ID */
{
  http_status_t         status;         /* Policy status */
  cupsd_subscription_t  *sub;           /* Subscription */
  cupsd_policy_t        *policy;        /* Current security policy */
  cups_array_t          *ra,            /* Requested attributes array */
                        *exclude;       /* Private attributes array */


  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "get_subscription_attrs(con=%p[%d], sub_id=%d)",
                  con, con->http.fd, sub_id);

 /*
  * Is the subscription ID valid?
  */

  if ((sub = cupsdFindSubscription(sub_id)) == NULL)
  {
   /*
    * Bad subscription ID...
    */

    send_ipp_status(con, IPP_NOT_FOUND, _("Subscription #%d does not exist."),
                    sub_id);
    return;
  }

 /*
  * Check policy...
  */

  if (sub->dest)
    policy = sub->dest->op_policy_ptr;
  else
    policy = DefaultPolicyPtr;

  if ((status = cupsdCheckPolicy(policy, con, sub->owner)) != HTTP_OK)
  {
    send_http_error(con, status, sub->dest);
    return;
  }

  exclude = cupsdGetPrivateAttrs(policy, con, sub->dest, sub->owner);

 /*
  * Copy the subscription attributes to the response using the
  * requested-attributes attribute that may be provided by the client.
  */

  ra = create_requested_array(con->request);

  copy_subscription_attrs(con, sub, ra, exclude);

  cupsArrayDelete(ra);

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'get_subscriptions()' - Get subscriptions.
 */

static void
get_subscriptions(cupsd_client_t  *con, /* I - Client connection */
                  ipp_attribute_t *uri) /* I - Printer/job URI */
{
  http_status_t         status;         /* Policy status */
  int                   count;          /* Number of subscriptions */
  int                   limit;          /* Limit */
  cupsd_subscription_t  *sub;           /* Subscription */
  cups_array_t          *ra;            /* Requested attributes array */
  ipp_attribute_t       *attr;          /* Attribute */
  cups_ptype_t          dtype;          /* Destination type (printer/class) */
  char                  scheme[HTTP_MAX_URI],
                                        /* Scheme portion of URI */
                        username[HTTP_MAX_URI],
                                        /* Username portion of URI */
                        host[HTTP_MAX_URI],
                                        /* Host portion of URI */
                        resource[HTTP_MAX_URI];
                                        /* Resource portion of URI */
  int                   port;           /* Port portion of URI */
  cupsd_job_t           *job;           /* Job pointer */
  cupsd_printer_t       *printer;       /* Printer */
  cupsd_policy_t        *policy;        /* Policy */
  cups_array_t          *exclude;       /* Private attributes array */


  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "get_subscriptions(con=%p[%d], uri=%s)",
                  con, con->http.fd, uri->values[0].string.text);

 /*
  * Is the destination valid?
  */

  httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text, scheme,
                  sizeof(scheme), username, sizeof(username), host,
                  sizeof(host), &port, resource, sizeof(resource));

  if (!strcmp(resource, "/") ||
      (!strncmp(resource, "/jobs", 5) && strlen(resource) <= 6) ||
      (!strncmp(resource, "/printers", 9) && strlen(resource) <= 10) ||
      (!strncmp(resource, "/classes", 8) && strlen(resource) <= 9))
  {
    printer = NULL;
    job     = NULL;
  }
  else if (!strncmp(resource, "/jobs/", 6) && resource[6])
  {
    printer = NULL;
    job     = cupsdFindJob(atoi(resource + 6));

    if (!job)
    {
      send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."),
                      atoi(resource + 6));
      return;
    }
  }
  else if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }
  else if ((attr = ippFindAttribute(con->request, "notify-job-id",
                                    IPP_TAG_INTEGER)) != NULL)
  {
    job = cupsdFindJob(attr->values[0].integer);

    if (!job)
    {
      send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."),
                      attr->values[0].integer);
      return;
    }
  }
  else
    job = NULL;

 /*
  * Check policy...
  */

  if (printer)
    policy = printer->op_policy_ptr;
  else
    policy = DefaultPolicyPtr;

  if ((status = cupsdCheckPolicy(policy, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, printer);
    return;
  }

 /*
  * Copy the subscription attributes to the response using the
  * requested-attributes attribute that may be provided by the client.
  */

  ra = create_requested_array(con->request);

  if ((attr = ippFindAttribute(con->request, "limit",
                               IPP_TAG_INTEGER)) != NULL)
    limit = attr->values[0].integer;
  else
    limit = 0;

 /*
  * See if we only want to see subscriptions for a specific user...
  */

  if ((attr = ippFindAttribute(con->request, "my-subscriptions",
                               IPP_TAG_BOOLEAN)) != NULL &&
      attr->values[0].boolean)
    strlcpy(username, get_username(con), sizeof(username));
  else
    username[0] = '\0';

  for (sub = (cupsd_subscription_t *)cupsArrayFirst(Subscriptions), count = 0;
       sub;
       sub = (cupsd_subscription_t *)cupsArrayNext(Subscriptions))
    if ((!printer || sub->dest == printer) && (!job || sub->job == job) &&
        (!username[0] || !_cups_strcasecmp(username, sub->owner)))
    {
      ippAddSeparator(con->response);

      exclude = cupsdGetPrivateAttrs(sub->dest ? sub->dest->op_policy_ptr :
                                                 policy, con, sub->dest,
                                                 sub->owner);

      copy_subscription_attrs(con, sub, ra, exclude);

      count ++;
      if (limit && count >= limit)
        break;
    }

  cupsArrayDelete(ra);

  if (count)
    con->response->request.status.status_code = IPP_OK;
  else
    send_ipp_status(con, IPP_NOT_FOUND, _("No subscriptions found."));
}


/*
 * 'get_username()' - Get the username associated with a request.
 */

static const char *                     /* O - Username */
get_username(cupsd_client_t *con)       /* I - Connection */
{
  ipp_attribute_t       *attr;          /* Attribute */


  if (con->username[0])
    return (con->username);
  else if ((attr = ippFindAttribute(con->request, "requesting-user-name",
                                    IPP_TAG_NAME)) != NULL)
    return (attr->values[0].string.text);
  else
    return ("anonymous");
}


/*
 * 'hold_job()' - Hold a print job.
 */

static void
hold_job(cupsd_client_t  *con,          /* I - Client connection */
         ipp_attribute_t *uri)          /* I - Job or Printer URI */
{
  ipp_attribute_t *attr;                /* Current job-hold-until */
  const char    *when;                  /* New value */
  int           jobid;                  /* Job ID */
  char          scheme[HTTP_MAX_URI],   /* Method portion of URI */
                username[HTTP_MAX_URI], /* Username portion of URI */
                host[HTTP_MAX_URI],     /* Host portion of URI */
                resource[HTTP_MAX_URI]; /* Resource portion of URI */
  int           port;                   /* Port portion of URI */
  cupsd_job_t   *job;                   /* Job information */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "hold_job(%p[%d], %s)", con, con->http.fd,
                  uri->values[0].string.text);

 /*
  * See if we have a job URI or a printer URI...
  */

  if (!strcmp(uri->name, "printer-uri"))
  {
   /*
    * Got a printer URI; see if we also have a job-id attribute...
    */

    if ((attr = ippFindAttribute(con->request, "job-id",
                                 IPP_TAG_INTEGER)) == NULL)
    {
      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Got a printer-uri attribute but no job-id."));
      return;
    }

    jobid = attr->values[0].integer;
  }
  else
  {
   /*
    * Got a job URI; parse it to get the job ID...
    */

    httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text, scheme,
                    sizeof(scheme), username, sizeof(username), host,
                    sizeof(host), &port, resource, sizeof(resource));

    if (strncmp(resource, "/jobs/", 6))
    {
     /*
      * Not a valid URI!
      */

      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Bad job-uri \"%s\"."),
                      uri->values[0].string.text);
      return;
    }

    jobid = atoi(resource + 6);
  }

 /*
  * See if the job exists...
  */

  if ((job = cupsdFindJob(jobid)) == NULL)
  {
   /*
    * Nope - return a "not found" error...
    */

    send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."), jobid);
    return;
  }

 /*
  * See if the job is owned by the requesting user...
  */

  if (!validate_user(job, con, job->username, username, sizeof(username)))
  {
    send_http_error(con, con->username[0] ? HTTP_FORBIDDEN : HTTP_UNAUTHORIZED,
                    cupsdFindDest(job->dest));
    return;
  }

 /*
  * See if the job is in a state that allows holding...
  */

  if (job->state_value > IPP_JOB_STOPPED)
  {
   /*
    * Return a "not-possible" error...
    */

    send_ipp_status(con, IPP_NOT_POSSIBLE,
                    _("Job #%d is finished and cannot be altered."),
                    job->id);
    return;
  }

 /*
  * Hold the job and return...
  */

  if ((attr = ippFindAttribute(con->request, "job-hold-until",
                               IPP_TAG_KEYWORD)) == NULL)
    attr = ippFindAttribute(con->request, "job-hold-until", IPP_TAG_NAME);

  if (attr)
  {
    when = attr->values[0].string.text;

    cupsdAddEvent(CUPSD_EVENT_JOB_CONFIG_CHANGED, cupsdFindDest(job->dest), job,
                  "Job job-hold-until value changed by user.");
  }
  else
    when = "indefinite";

  cupsdSetJobHoldUntil(job, when, 1);
  cupsdSetJobState(job, IPP_JOB_HELD, CUPSD_JOB_DEFAULT, "Job held by \"%s\".",
                   username);

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'hold_new_jobs()' - Hold pending/new jobs on a printer or class.
 */

static void
hold_new_jobs(cupsd_client_t  *con,     /* I - Connection */
              ipp_attribute_t *uri)     /* I - Printer URI */
{
  http_status_t         status;         /* Policy status */
  cups_ptype_t          dtype;          /* Destination type (printer/class) */
  cupsd_printer_t       *printer;       /* Printer data */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "hold_new_jobs(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Is the destination valid?
  */

  if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(printer->op_policy_ptr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, printer);
    return;
  }

 /*
  * Hold pending/new jobs sent to the printer...
  */

  printer->holding_new_jobs = 1;

  cupsdSetPrinterReasons(printer, "+hold-new-jobs");

  if (dtype & CUPS_PRINTER_CLASS)
    cupsdLogMessage(CUPSD_LOG_INFO,
                    "Class \"%s\" now holding pending/new jobs (\"%s\").",
                    printer->name, get_username(con));
  else
    cupsdLogMessage(CUPSD_LOG_INFO,
                    "Printer \"%s\" now holding pending/new jobs (\"%s\").",
                    printer->name, get_username(con));

 /*
  * Everything was ok, so return OK status...
  */

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'move_job()' - Move a job to a new destination.
 */

static void
move_job(cupsd_client_t  *con,          /* I - Client connection */
         ipp_attribute_t *uri)          /* I - Job URI */
{
  http_status_t status;                 /* Policy status */
  ipp_attribute_t *attr;                /* Current attribute */
  int           jobid;                  /* Job ID */
  cupsd_job_t   *job;                   /* Current job */
  const char    *src;                   /* Source printer/class */
  cups_ptype_t  stype,                  /* Source type (printer or class) */
                dtype;                  /* Destination type (printer/class) */
  char          scheme[HTTP_MAX_URI],   /* Scheme portion of URI */
                username[HTTP_MAX_URI], /* Username portion of URI */
                host[HTTP_MAX_URI],     /* Host portion of URI */
                resource[HTTP_MAX_URI]; /* Resource portion of URI */
  int           port;                   /* Port portion of URI */
  cupsd_printer_t *sprinter,            /* Source printer */
                *dprinter;              /* Destination printer */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "move_job(%p[%d], %s)", con, con->http.fd,
                  uri->values[0].string.text);

 /*
  * Get the new printer or class...
  */

  if ((attr = ippFindAttribute(con->request, "job-printer-uri",
                               IPP_TAG_URI)) == NULL)
  {
   /*
    * Need job-printer-uri...
    */

    send_ipp_status(con, IPP_BAD_REQUEST,
                    _("job-printer-uri attribute missing."));
    return;
  }

  if (!cupsdValidateDest(attr->values[0].string.text, &dtype, &dprinter))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * See if we have a job URI or a printer URI...
  */

  httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text, scheme,
                  sizeof(scheme), username, sizeof(username), host,
                  sizeof(host), &port, resource, sizeof(resource));

  if (!strcmp(uri->name, "printer-uri"))
  {
   /*
    * Got a printer URI; see if we also have a job-id attribute...
    */

    if ((attr = ippFindAttribute(con->request, "job-id",
                                 IPP_TAG_INTEGER)) == NULL)
    {
     /*
      * Move all jobs...
      */

      if ((src = cupsdValidateDest(uri->values[0].string.text, &stype,
                                   &sprinter)) == NULL)
      {
       /*
        * Bad URI...
        */

        send_ipp_status(con, IPP_NOT_FOUND,
                        _("The printer or class does not exist."));
        return;
      }

      job = NULL;
    }
    else
    {
     /*
      * Otherwise, just move a single job...
      */

      if ((job = cupsdFindJob(attr->values[0].integer)) == NULL)
      {
       /*
        * Nope - return a "not found" error...
        */

        send_ipp_status(con, IPP_NOT_FOUND,
                        _("Job #%d does not exist."), attr->values[0].integer);
        return;
      }
      else
      {
       /*
        * Job found, initialize source pointers...
        */

        src      = NULL;
        sprinter = NULL;
      }
    }
  }
  else
  {
   /*
    * Got a job URI; parse it to get the job ID...
    */

    if (strncmp(resource, "/jobs/", 6))
    {
     /*
      * Not a valid URI!
      */

      send_ipp_status(con, IPP_BAD_REQUEST, _("Bad job-uri \"%s\"."),
                      uri->values[0].string.text);
      return;
    }

   /*
    * See if the job exists...
    */

    jobid = atoi(resource + 6);

    if ((job = cupsdFindJob(jobid)) == NULL)
    {
     /*
      * Nope - return a "not found" error...
      */

      send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."), jobid);
      return;
    }
    else
    {
     /*
      * Job found, initialize source pointers...
      */

      src      = NULL;
      sprinter = NULL;
    }
  }

 /*
  * Check the policy of the destination printer...
  */

  if ((status = cupsdCheckPolicy(dprinter->op_policy_ptr, con,
                                 job ? job->username : NULL)) != HTTP_OK)
  {
    send_http_error(con, status, dprinter);
    return;
  }

 /*
  * Now move the job or jobs...
  */

  if (job)
  {
   /*
    * See if the job has been completed...
    */

    if (job->state_value > IPP_JOB_STOPPED)
    {
     /*
      * Return a "not-possible" error...
      */

      send_ipp_status(con, IPP_NOT_POSSIBLE,
                      _("Job #%d is finished and cannot be altered."),
                      job->id);
      return;
    }

   /*
    * See if the job is owned by the requesting user...
    */

    if (!validate_user(job, con, job->username, username, sizeof(username)))
    {
      send_http_error(con, con->username[0] ? HTTP_FORBIDDEN : HTTP_UNAUTHORIZED,
                      cupsdFindDest(job->dest));
      return;
    }

   /*
    * Move the job to a different printer or class...
    */

    cupsdMoveJob(job, dprinter);
  }
  else
  {
   /*
    * Got the source printer, now look through the jobs...
    */

    for (job = (cupsd_job_t *)cupsArrayFirst(Jobs);
         job;
         job = (cupsd_job_t *)cupsArrayNext(Jobs))
    {
     /*
      * See if the job is pointing at the source printer or has not been
      * completed...
      */

      if (_cups_strcasecmp(job->dest, src) ||
          job->state_value > IPP_JOB_STOPPED)
        continue;

     /*
      * See if the job can be moved by the requesting user...
      */

      if (!validate_user(job, con, job->username, username, sizeof(username)))
        continue;

     /*
      * Move the job to a different printer or class...
      */

      cupsdMoveJob(job, dprinter);
    }
  }

 /*
  * Start jobs if possible...
  */

  cupsdCheckJobs();

 /*
  * Return with "everything is OK" status...
  */

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'ppd_parse_line()' - Parse a PPD default line.
 */

static int                              /* O - 0 on success, -1 on failure */
ppd_parse_line(const char *line,        /* I - Line */
               char       *option,      /* O - Option name */
               int        olen,         /* I - Size of option name */
               char       *choice,      /* O - Choice name */
               int        clen)         /* I - Size of choice name */
{
 /*
  * Verify this is a default option line...
  */

  if (strncmp(line, "*Default", 8))
    return (-1);

 /*
  * Read the option name...
  */

  for (line += 8, olen --;
       *line > ' ' && *line < 0x7f && *line != ':' && *line != '/';
       line ++)
    if (olen > 0)
    {
      *option++ = *line;
      olen --;
    }

  *option = '\0';

 /*
  * Skip everything else up to the colon (:)...
  */

  while (*line && *line != ':')
    line ++;

  if (!*line)
    return (-1);

  line ++;

 /*
  * Now grab the option choice, skipping leading whitespace...
  */

  while (isspace(*line & 255))
    line ++;

  for (clen --;
       *line > ' ' && *line < 0x7f && *line != ':' && *line != '/';
       line ++)
    if (clen > 0)
    {
      *choice++ = *line;
      clen --;
    }

  *choice = '\0';

 /*
  * Return with no errors...
  */

  return (0);
}


/*
 * 'print_job()' - Print a file to a printer or class.
 */

static void
print_job(cupsd_client_t  *con,         /* I - Client connection */
          ipp_attribute_t *uri)         /* I - Printer URI */
{
  ipp_attribute_t *attr;                /* Current attribute */
  ipp_attribute_t *format;              /* Document-format attribute */
  const char    *default_format;        /* document-format-default value */
  cupsd_job_t   *job;                   /* New job */
  char          filename[1024];         /* Job filename */
  mime_type_t   *filetype;              /* Type of file */
  char          super[MIME_MAX_SUPER],  /* Supertype of file */
                type[MIME_MAX_TYPE],    /* Subtype of file */
                mimetype[MIME_MAX_SUPER + MIME_MAX_TYPE + 2];
                                        /* Textual name of mime type */
  cupsd_printer_t *printer;             /* Printer data */
  struct stat   fileinfo;               /* File information */
  int           kbytes;                 /* Size of file */
  int           compression;            /* Document compression */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "print_job(%p[%d], %s)", con, con->http.fd,
                  uri->values[0].string.text);

 /*
  * Validate print file attributes, for now just document-format and
  * compression (CUPS only supports "none" and "gzip")...
  */

  compression = CUPS_FILE_NONE;

  if ((attr = ippFindAttribute(con->request, "compression",
                               IPP_TAG_KEYWORD)) != NULL)
  {
    if (strcmp(attr->values[0].string.text, "none")
#ifdef HAVE_LIBZ
        && strcmp(attr->values[0].string.text, "gzip")
#endif /* HAVE_LIBZ */
      )
    {
      send_ipp_status(con, IPP_ATTRIBUTES,
                      _("Unsupported compression \"%s\"."),
                      attr->values[0].string.text);
      ippAddString(con->response, IPP_TAG_UNSUPPORTED_GROUP, IPP_TAG_KEYWORD,
                   "compression", NULL, attr->values[0].string.text);
      return;
    }

#ifdef HAVE_LIBZ
    if (!strcmp(attr->values[0].string.text, "gzip"))
      compression = CUPS_FILE_GZIP;
#endif /* HAVE_LIBZ */
  }

 /*
  * Do we have a file to print?
  */

  if (!con->filename)
  {
    send_ipp_status(con, IPP_BAD_REQUEST, _("No file in print request."));
    return;
  }

 /*
  * Is the destination valid?
  */

  if (!cupsdValidateDest(uri->values[0].string.text, NULL, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * Is it a format we support?
  */

  if ((format = ippFindAttribute(con->request, "document-format",
                                 IPP_TAG_MIMETYPE)) != NULL)
  {
   /*
    * Grab format from client...
    */

    if (sscanf(format->values[0].string.text, "%15[^/]/%31[^;]", super,
               type) != 2)
    {
      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Bad document-format \"%s\"."),
                      format->values[0].string.text);
      return;
    }
  }
  else if ((default_format = cupsGetOption("document-format",
                                           printer->num_options,
                                           printer->options)) != NULL)
  {
   /*
    * Use default document format...
    */

    if (sscanf(default_format, "%15[^/]/%31[^;]", super, type) != 2)
    {
      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Bad document-format \"%s\"."),
                      default_format);
      return;
    }
  }
  else
  {
   /*
    * Auto-type it!
    */

    strcpy(super, "application");
    strcpy(type, "octet-stream");
  }

  if (!strcmp(super, "application") && !strcmp(type, "octet-stream"))
  {
   /*
    * Auto-type the file...
    */

    ipp_attribute_t     *doc_name;      /* document-name attribute */


    cupsdLogMessage(CUPSD_LOG_DEBUG, "[Job ???] Auto-typing file...");

    doc_name = ippFindAttribute(con->request, "document-name", IPP_TAG_NAME);
    filetype = mimeFileType(MimeDatabase, con->filename,
                            doc_name ? doc_name->values[0].string.text : NULL,
                            &compression);

    if (!filetype)
      filetype = mimeType(MimeDatabase, super, type);

    cupsdLogMessage(CUPSD_LOG_INFO, "[Job ???] Request file type is %s/%s.",
                    filetype->super, filetype->type);
  }
  else
    filetype = mimeType(MimeDatabase, super, type);

  if (filetype &&
      (!format ||
       (!strcmp(super, "application") && !strcmp(type, "octet-stream"))))
  {
   /*
    * Replace the document-format attribute value with the auto-typed or
    * default one.
    */

    snprintf(mimetype, sizeof(mimetype), "%s/%s", filetype->super,
             filetype->type);

    if (format)
    {
      _cupsStrFree(format->values[0].string.text);

      format->values[0].string.text = _cupsStrAlloc(mimetype);
    }
    else
      ippAddString(con->request, IPP_TAG_JOB, IPP_TAG_MIMETYPE,
                   "document-format", NULL, mimetype);
  }
  else if (!filetype)
  {
    send_ipp_status(con, IPP_DOCUMENT_FORMAT,
                    _("Unsupported document-format \"%s\"."),
                    format ? format->values[0].string.text :
                             "application/octet-stream");
    cupsdLogMessage(CUPSD_LOG_INFO,
                    "Hint: Do you have the raw file printing rules enabled?");

    if (format)
      ippAddString(con->response, IPP_TAG_UNSUPPORTED_GROUP, IPP_TAG_MIMETYPE,
                   "document-format", NULL, format->values[0].string.text);

    return;
  }

 /*
  * Read any embedded job ticket info from PS files...
  */

  if (!_cups_strcasecmp(filetype->super, "application") &&
      (!_cups_strcasecmp(filetype->type, "postscript") ||
       !_cups_strcasecmp(filetype->type, "pdf")))
    read_job_ticket(con);

 /*
  * Create the job object...
  */

  if ((job = add_job(con, printer, filetype)) == NULL)
    return;

 /*
  * Update quota data...
  */

  if (stat(con->filename, &fileinfo))
    kbytes = 0;
  else
    kbytes = (fileinfo.st_size + 1023) / 1024;

  cupsdUpdateQuota(printer, job->username, 0, kbytes);

  if ((attr = ippFindAttribute(job->attrs, "job-k-octets",
                               IPP_TAG_INTEGER)) != NULL)
    attr->values[0].integer += kbytes;

 /*
  * Add the job file...
  */

  if (add_file(con, job, filetype, compression))
    return;

  snprintf(filename, sizeof(filename), "%s/d%05d-%03d", RequestRoot, job->id,
           job->num_files);
  rename(con->filename, filename);
  cupsdClearString(&con->filename);

 /*
  * See if we need to add the ending sheet...
  */

  if (cupsdTimeoutJob(job))
    return;

 /*
  * Log and save the job...
  */

  cupsdLogJob(job, CUPSD_LOG_INFO,
              "File of type %s/%s queued by \"%s\".",
              filetype->super, filetype->type, job->username);
  cupsdLogJob(job, CUPSD_LOG_DEBUG, "hold_until=%d", (int)job->hold_until);
  cupsdLogJob(job, CUPSD_LOG_INFO, "Queued on \"%s\" by \"%s\".",
              job->dest, job->username);

 /*
  * Start the job if possible...
  */

  cupsdCheckJobs();
}


/*
 * 'read_job_ticket()' - Read a job ticket embedded in a print file.
 *
 * This function only gets called when printing a single PDF or PostScript
 * file using the Print-Job operation.  It doesn't work for Create-Job +
 * Send-File, since the job attributes need to be set at job creation
 * time for banners to work.  The embedded job ticket stuff is here
 * primarily to allow the Windows printer driver for CUPS to pass in JCL
 * options and IPP attributes which otherwise would be lost.
 *
 * The format of a job ticket is simple:
 *
 *     %cupsJobTicket: attr1=value1 attr2=value2 ... attrN=valueN
 *
 *     %cupsJobTicket: attr1=value1
 *     %cupsJobTicket: attr2=value2
 *     ...
 *     %cupsJobTicket: attrN=valueN
 *
 * Job ticket lines must appear immediately after the first line that
 * specifies PostScript (%!PS-Adobe-3.0) or PDF (%PDF) format, and CUPS
 * stops looking for job ticket info when it finds a line that does not begin
 * with "%cupsJobTicket:".
 *
 * The maximum length of a job ticket line, including the prefix, is
 * 255 characters to conform with the Adobe DSC.
 *
 * Read-only attributes are rejected with a notice to the error log in
 * case a malicious user tries anything.  Since the job ticket is read
 * prior to attribute validation in print_job(), job ticket attributes
 * will go through the same validation as IPP attributes...
 */

static void
read_job_ticket(cupsd_client_t *con)    /* I - Client connection */
{
  cups_file_t           *fp;            /* File to read from */
  char                  line[256];      /* Line data */
  int                   num_options;    /* Number of options */
  cups_option_t         *options;       /* Options */
  ipp_t                 *ticket;        /* New attributes */
  ipp_attribute_t       *attr,          /* Current attribute */
                        *attr2,         /* Job attribute */
                        *prev2;         /* Previous job attribute */


 /*
  * First open the print file...
  */

  if ((fp = cupsFileOpen(con->filename, "rb")) == NULL)
  {
    cupsdLogMessage(CUPSD_LOG_ERROR,
                    "Unable to open print file for job ticket - %s",
                    strerror(errno));
    return;
  }

 /*
  * Skip the first line...
  */

  if (cupsFileGets(fp, line, sizeof(line)) == NULL)
  {
    cupsdLogMessage(CUPSD_LOG_ERROR,
                    "Unable to read from print file for job ticket - %s",
                    strerror(errno));
    cupsFileClose(fp);
    return;
  }

  if (strncmp(line, "%!PS-Adobe-", 11) && strncmp(line, "%PDF-", 5))
  {
   /*
    * Not a DSC-compliant file, so no job ticket info will be available...
    */

    cupsFileClose(fp);
    return;
  }

 /*
  * Read job ticket info from the file...
  */

  num_options = 0;
  options     = NULL;

  while (cupsFileGets(fp, line, sizeof(line)))
  {
   /*
    * Stop at the first non-ticket line...
    */

    if (strncmp(line, "%cupsJobTicket:", 15))
      break;

   /*
    * Add the options to the option array...
    */

    num_options = cupsParseOptions(line + 15, num_options, &options);
  }

 /*
  * Done with the file; see if we have any options...
  */

  cupsFileClose(fp);

  if (num_options == 0)
    return;

 /*
  * OK, convert the options to an attribute list, and apply them to
  * the request...
  */

  ticket = ippNew();
  cupsEncodeOptions(ticket, num_options, options);

 /*
  * See what the user wants to change.
  */

  for (attr = ticket->attrs; attr; attr = attr->next)
  {
    if (attr->group_tag != IPP_TAG_JOB || !attr->name)
      continue;

    if (!strcmp(attr->name, "job-originating-host-name") ||
        !strcmp(attr->name, "job-originating-user-name") ||
        !strcmp(attr->name, "job-media-sheets-completed") ||
        !strcmp(attr->name, "job-k-octets") ||
        !strcmp(attr->name, "job-id") ||
        !strncmp(attr->name, "job-state", 9) ||
        !strncmp(attr->name, "time-at-", 8))
      continue; /* Read-only attrs */

    if ((attr2 = ippFindAttribute(con->request, attr->name,
                                  IPP_TAG_ZERO)) != NULL)
    {
     /*
      * Some other value; first free the old value...
      */

      if (con->request->attrs == attr2)
      {
        con->request->attrs = attr2->next;
        prev2               = NULL;
      }
      else
      {
        for (prev2 = con->request->attrs; prev2; prev2 = prev2->next)
          if (prev2->next == attr2)
          {
            prev2->next = attr2->next;
            break;
          }
      }

      if (con->request->last == attr2)
        con->request->last = prev2;

      ippDeleteAttribute(NULL, attr2);
    }

   /*
    * Add new option by copying it...
    */

    ippCopyAttribute(con->request, attr, 0);
  }

 /*
  * Then free the attribute list and option array...
  */

  ippDelete(ticket);
  cupsFreeOptions(num_options, options);
}


/*
 * 'reject_jobs()' - Reject print jobs to a printer.
 */

static void
reject_jobs(cupsd_client_t  *con,       /* I - Client connection */
            ipp_attribute_t *uri)       /* I - Printer or class URI */
{
  http_status_t status;                 /* Policy status */
  cups_ptype_t  dtype;                  /* Destination type (printer/class) */
  cupsd_printer_t *printer;             /* Printer data */
  ipp_attribute_t *attr;                /* printer-state-message text */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "reject_jobs(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Is the destination valid?
  */

  if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(printer->op_policy_ptr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, printer);
    return;
  }

 /*
  * Reject jobs sent to the printer...
  */

  printer->accepting = 0;

  if ((attr = ippFindAttribute(con->request, "printer-state-message",
                               IPP_TAG_TEXT)) == NULL)
    strcpy(printer->state_message, "Rejecting Jobs");
  else
    strlcpy(printer->state_message, attr->values[0].string.text,
            sizeof(printer->state_message));

  cupsdAddEvent(CUPSD_EVENT_PRINTER_STATE, printer, NULL,
                "No longer accepting jobs.");

  if (dtype & CUPS_PRINTER_CLASS)
  {
    cupsdMarkDirty(CUPSD_DIRTY_CLASSES);

    cupsdLogMessage(CUPSD_LOG_INFO, "Class \"%s\" rejecting jobs (\"%s\").",
                    printer->name, get_username(con));
  }
  else
  {
    cupsdMarkDirty(CUPSD_DIRTY_PRINTERS);

    cupsdLogMessage(CUPSD_LOG_INFO, "Printer \"%s\" rejecting jobs (\"%s\").",
                    printer->name, get_username(con));
  }

 /*
  * Everything was ok, so return OK status...
  */

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'release_held_new_jobs()' - Release pending/new jobs on a printer or class.
 */

static void
release_held_new_jobs(
    cupsd_client_t  *con,               /* I - Connection */
    ipp_attribute_t *uri)               /* I - Printer URI */
{
  http_status_t         status;         /* Policy status */
  cups_ptype_t          dtype;          /* Destination type (printer/class) */
  cupsd_printer_t       *printer;       /* Printer data */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "release_held_new_jobs(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Is the destination valid?
  */

  if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(printer->op_policy_ptr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, printer);
    return;
  }

 /*
  * Hold pending/new jobs sent to the printer...
  */

  printer->holding_new_jobs = 0;

  cupsdSetPrinterReasons(printer, "-hold-new-jobs");

  if (dtype & CUPS_PRINTER_CLASS)
    cupsdLogMessage(CUPSD_LOG_INFO,
                    "Class \"%s\" now printing pending/new jobs (\"%s\").",
                    printer->name, get_username(con));
  else
    cupsdLogMessage(CUPSD_LOG_INFO,
                    "Printer \"%s\" now printing pending/new jobs (\"%s\").",
                    printer->name, get_username(con));

 /*
  * Everything was ok, so return OK status...
  */

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'release_job()' - Release a held print job.
 */

static void
release_job(cupsd_client_t  *con,       /* I - Client connection */
            ipp_attribute_t *uri)       /* I - Job or Printer URI */
{
  ipp_attribute_t *attr;                /* Current attribute */
  int           jobid;                  /* Job ID */
  char          scheme[HTTP_MAX_URI],   /* Method portion of URI */
                username[HTTP_MAX_URI], /* Username portion of URI */
                host[HTTP_MAX_URI],     /* Host portion of URI */
                resource[HTTP_MAX_URI]; /* Resource portion of URI */
  int           port;                   /* Port portion of URI */
  cupsd_job_t   *job;                   /* Job information */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "release_job(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * See if we have a job URI or a printer URI...
  */

  if (!strcmp(uri->name, "printer-uri"))
  {
   /*
    * Got a printer URI; see if we also have a job-id attribute...
    */

    if ((attr = ippFindAttribute(con->request, "job-id",
                                 IPP_TAG_INTEGER)) == NULL)
    {
      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Got a printer-uri attribute but no job-id."));
      return;
    }

    jobid = attr->values[0].integer;
  }
  else
  {
   /*
    * Got a job URI; parse it to get the job ID...
    */

    httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text, scheme,
                    sizeof(scheme), username, sizeof(username), host,
                    sizeof(host), &port, resource, sizeof(resource));

    if (strncmp(resource, "/jobs/", 6))
    {
     /*
      * Not a valid URI!
      */

      send_ipp_status(con, IPP_BAD_REQUEST, _("Bad job-uri \"%s\"."),
                      uri->values[0].string.text);
      return;
    }

    jobid = atoi(resource + 6);
  }

 /*
  * See if the job exists...
  */

  if ((job = cupsdFindJob(jobid)) == NULL)
  {
   /*
    * Nope - return a "not found" error...
    */

    send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."), jobid);
    return;
  }

 /*
  * See if job is "held"...
  */

  if (job->state_value != IPP_JOB_HELD)
  {
   /*
    * Nope - return a "not possible" error...
    */

    send_ipp_status(con, IPP_NOT_POSSIBLE, _("Job #%d is not held."), jobid);
    return;
  }

 /*
  * See if the job is owned by the requesting user...
  */

  if (!validate_user(job, con, job->username, username, sizeof(username)))
  {
    send_http_error(con, con->username[0] ? HTTP_FORBIDDEN : HTTP_UNAUTHORIZED,
                    cupsdFindDest(job->dest));
    return;
  }

 /*
  * Reset the job-hold-until value to "no-hold"...
  */

  if ((attr = ippFindAttribute(job->attrs, "job-hold-until",
                               IPP_TAG_KEYWORD)) == NULL)
    attr = ippFindAttribute(job->attrs, "job-hold-until", IPP_TAG_NAME);

  if (attr)
  {
    _cupsStrFree(attr->values[0].string.text);

    attr->value_tag = IPP_TAG_KEYWORD;
    attr->values[0].string.text = _cupsStrAlloc("no-hold");

    cupsdAddEvent(CUPSD_EVENT_JOB_CONFIG_CHANGED, cupsdFindDest(job->dest), job,
                  "Job job-hold-until value changed by user.");
    ippSetString(job->attrs, &job->reasons, 0, "none");
  }

 /*
  * Release the job and return...
  */

  cupsdReleaseJob(job);

  cupsdAddEvent(CUPSD_EVENT_JOB_STATE, cupsdFindDest(job->dest), job,
                "Job released by user.");

  cupsdLogJob(job, CUPSD_LOG_INFO, "Released by \"%s\".", username);

  con->response->request.status.status_code = IPP_OK;

  cupsdCheckJobs();
}


/*
 * 'renew_subscription()' - Renew an existing subscription...
 */

static void
renew_subscription(
    cupsd_client_t *con,                /* I - Client connection */
    int            sub_id)              /* I - Subscription ID */
{
  http_status_t         status;         /* Policy status */
  cupsd_subscription_t  *sub;           /* Subscription */
  ipp_attribute_t       *lease;         /* notify-lease-duration */


  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "renew_subscription(con=%p[%d], sub_id=%d)",
                  con, con->http.fd, sub_id);

 /*
  * Is the subscription ID valid?
  */

  if ((sub = cupsdFindSubscription(sub_id)) == NULL)
  {
   /*
    * Bad subscription ID...
    */

    send_ipp_status(con, IPP_NOT_FOUND, _("Subscription #%d does not exist."),
                    sub_id);
    return;
  }

  if (sub->job)
  {
   /*
    * Job subscriptions cannot be renewed...
    */

    send_ipp_status(con, IPP_NOT_POSSIBLE,
                    _("Job subscriptions cannot be renewed."));
    return;
  }

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(sub->dest ? sub->dest->op_policy_ptr :
                                             DefaultPolicyPtr,
                                 con, sub->owner)) != HTTP_OK)
  {
    send_http_error(con, status, sub->dest);
    return;
  }

 /*
  * Renew the subscription...
  */

  lease = ippFindAttribute(con->request, "notify-lease-duration",
                           IPP_TAG_INTEGER);

  sub->lease = lease ? lease->values[0].integer : DefaultLeaseDuration;

  if (MaxLeaseDuration && (sub->lease == 0 || sub->lease > MaxLeaseDuration))
  {
    cupsdLogMessage(CUPSD_LOG_INFO,
                    "renew_subscription: Limiting notify-lease-duration to "
                    "%d seconds.",
                    MaxLeaseDuration);
    sub->lease = MaxLeaseDuration;
  }

  sub->expire = sub->lease ? time(NULL) + sub->lease : 0;

  cupsdMarkDirty(CUPSD_DIRTY_SUBSCRIPTIONS);

  con->response->request.status.status_code = IPP_OK;

  ippAddInteger(con->response, IPP_TAG_SUBSCRIPTION, IPP_TAG_INTEGER,
                "notify-lease-duration", sub->lease);
}


/*
 * 'restart_job()' - Restart an old print job.
 */

static void
restart_job(cupsd_client_t  *con,       /* I - Client connection */
            ipp_attribute_t *uri)       /* I - Job or Printer URI */
{
  ipp_attribute_t *attr;                /* Current attribute */
  int           jobid;                  /* Job ID */
  cupsd_job_t   *job;                   /* Job information */
  char          scheme[HTTP_MAX_URI],   /* Method portion of URI */
                username[HTTP_MAX_URI], /* Username portion of URI */
                host[HTTP_MAX_URI],     /* Host portion of URI */
                resource[HTTP_MAX_URI]; /* Resource portion of URI */
  int           port;                   /* Port portion of URI */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "restart_job(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * See if we have a job URI or a printer URI...
  */

  if (!strcmp(uri->name, "printer-uri"))
  {
   /*
    * Got a printer URI; see if we also have a job-id attribute...
    */

    if ((attr = ippFindAttribute(con->request, "job-id",
                                 IPP_TAG_INTEGER)) == NULL)
    {
      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Got a printer-uri attribute but no job-id."));
      return;
    }

    jobid = attr->values[0].integer;
  }
  else
  {
   /*
    * Got a job URI; parse it to get the job ID...
    */

    httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text, scheme,
                    sizeof(scheme), username, sizeof(username), host,
                    sizeof(host), &port, resource, sizeof(resource));

    if (strncmp(resource, "/jobs/", 6))
    {
     /*
      * Not a valid URI!
      */

      send_ipp_status(con, IPP_BAD_REQUEST, _("Bad job-uri \"%s\"."),
                      uri->values[0].string.text);
      return;
    }

    jobid = atoi(resource + 6);
  }

 /*
  * See if the job exists...
  */

  if ((job = cupsdFindJob(jobid)) == NULL)
  {
   /*
    * Nope - return a "not found" error...
    */

    send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."), jobid);
    return;
  }

 /*
  * See if job is in any of the "completed" states...
  */

  if (job->state_value <= IPP_JOB_PROCESSING)
  {
   /*
    * Nope - return a "not possible" error...
    */

    send_ipp_status(con, IPP_NOT_POSSIBLE, _("Job #%d is not complete."),
                    jobid);
    return;
  }

 /*
  * See if we have retained the job files...
  */

  cupsdLoadJob(job);

  if (!job->attrs || job->num_files == 0)
  {
   /*
    * Nope - return a "not possible" error...
    */

    send_ipp_status(con, IPP_NOT_POSSIBLE,
                    _("Job #%d cannot be restarted - no files."), jobid);
    return;
  }

 /*
  * See if the job is owned by the requesting user...
  */

  if (!validate_user(job, con, job->username, username, sizeof(username)))
  {
    send_http_error(con, con->username[0] ? HTTP_FORBIDDEN : HTTP_UNAUTHORIZED,
                    cupsdFindDest(job->dest));
    return;
  }

 /*
  * See if the job-hold-until attribute is specified...
  */

  if ((attr = ippFindAttribute(con->request, "job-hold-until",
                               IPP_TAG_KEYWORD)) == NULL)
    attr = ippFindAttribute(con->request, "job-hold-until", IPP_TAG_NAME);

  if (attr && strcmp(attr->values[0].string.text, "no-hold"))
  {
   /*
    * Return the job to a held state...
    */

    cupsdLogJob(job, CUPSD_LOG_DEBUG,
                "Restarted by \"%s\" with job-hold-until=%s.",
                username, attr->values[0].string.text);
    cupsdSetJobHoldUntil(job, attr->values[0].string.text, 0);

    cupsdAddEvent(CUPSD_EVENT_JOB_CONFIG_CHANGED | CUPSD_EVENT_JOB_STATE,
                  NULL, job, "Job restarted by user with job-hold-until=%s",
                  attr->values[0].string.text);
  }
  else
  {
   /*
    * Restart the job...
    */

    cupsdRestartJob(job);
    cupsdCheckJobs();
  }

  cupsdLogJob(job, CUPSD_LOG_INFO, "Restarted by \"%s\".", username);

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'save_auth_info()' - Save authentication information for a job.
 */

static void
save_auth_info(
    cupsd_client_t  *con,               /* I - Client connection */
    cupsd_job_t     *job,               /* I - Job */
    ipp_attribute_t *auth_info)         /* I - auth-info attribute, if any */
{
  int                   i;              /* Looping var */
  char                  filename[1024]; /* Job authentication filename */
  cups_file_t           *fp;            /* Job authentication file */
  char                  line[65536];    /* Line for file */
  cupsd_printer_t       *dest;          /* Destination printer/class */


 /*
  * This function saves the in-memory authentication information for
  * a job so that it can be used to authenticate with a remote host.
  * The information is stored in a file that is readable only by the
  * root user.  The fields are Base-64 encoded, each on a separate line,
  * followed by random number (up to 1024) of newlines to limit the
  * amount of information that is exposed.
  *
  * Because of the potential for exposing of authentication information,
  * this functionality is only enabled when running cupsd as root.
  *
  * This caching only works for the Basic and BasicDigest authentication
  * types.  Digest authentication cannot be cached this way, and in
  * the future Kerberos authentication may make all of this obsolete.
  *
  * Authentication information is saved whenever an authenticated
  * Print-Job, Create-Job, or CUPS-Authenticate-Job operation is
  * performed.
  *
  * This information is deleted after a job is completed or canceled,
  * so reprints may require subsequent re-authentication.
  */

  if (RunUser)
    return;

  if ((dest = cupsdFindDest(job->dest)) == NULL)
    return;

 /*
  * Create the authentication file and change permissions...
  */

  snprintf(filename, sizeof(filename), "%s/a%05d", RequestRoot, job->id);
  if ((fp = cupsFileOpen(filename, "w")) == NULL)
  {
    cupsdLogMessage(CUPSD_LOG_ERROR,
                    "Unable to save authentication info to \"%s\" - %s",
                    filename, strerror(errno));
    return;
  }

  fchown(cupsFileNumber(fp), 0, 0);
  fchmod(cupsFileNumber(fp), 0400);

  cupsFilePuts(fp, "CUPSD-AUTH-V2\n");

  for (i = 0;
       i < (int)(sizeof(job->auth_env) / sizeof(job->auth_env[0]));
       i ++)
    cupsdClearString(job->auth_env + i);

  if (auth_info && auth_info->num_values == dest->num_auth_info_required)
  {
   /*
    * Write 1 to 3 auth values...
    */

    for (i = 0;
         i < auth_info->num_values &&
             i < (int)(sizeof(job->auth_env) / sizeof(job->auth_env[0]));
         i ++)
    {
      httpEncode64_2(line, sizeof(line), auth_info->values[i].string.text,
                     strlen(auth_info->values[i].string.text));
      cupsFilePutConf(fp, dest->auth_info_required[i], line);

      if (!strcmp(dest->auth_info_required[i], "username"))
        cupsdSetStringf(job->auth_env + i, "AUTH_USERNAME=%s",
                        auth_info->values[i].string.text);
      else if (!strcmp(dest->auth_info_required[i], "domain"))
        cupsdSetStringf(job->auth_env + i, "AUTH_DOMAIN=%s",
                        auth_info->values[i].string.text);
      else if (!strcmp(dest->auth_info_required[i], "password"))
        cupsdSetStringf(job->auth_env + i, "AUTH_PASSWORD=%s",
                        auth_info->values[i].string.text);
      else if (!strcmp(dest->auth_info_required[i], "negotiate"))
        cupsdSetStringf(job->auth_env + i, "AUTH_NEGOTIATE=%s",
                        auth_info->values[i].string.text);
      else
        i --;
    }
  }
  else if (auth_info && auth_info->num_values == 2 &&
           dest->num_auth_info_required == 1 &&
           !strcmp(dest->auth_info_required[0], "negotiate"))
  {
   /*
    * Allow fallback to username+password for Kerberized queues...
    */

    httpEncode64_2(line, sizeof(line), auth_info->values[0].string.text,
                   strlen(auth_info->values[0].string.text));
    cupsFilePutConf(fp, "username", line);

    cupsdSetStringf(job->auth_env + 0, "AUTH_USERNAME=%s",
                    auth_info->values[0].string.text);

    httpEncode64_2(line, sizeof(line), auth_info->values[1].string.text,
                   strlen(auth_info->values[1].string.text));
    cupsFilePutConf(fp, "password", line);

    cupsdSetStringf(job->auth_env + 1, "AUTH_PASSWORD=%s",
                    auth_info->values[1].string.text);
  }
  else if (con->username[0])
  {
   /*
    * Write the authenticated username...
    */

    httpEncode64_2(line, sizeof(line), con->username, strlen(con->username));
    cupsFilePutConf(fp, "username", line);

    cupsdSetStringf(job->auth_env + 0, "AUTH_USERNAME=%s", con->username);

   /*
    * Write the authenticated password...
    */

    httpEncode64_2(line, sizeof(line), con->password, strlen(con->password));
    cupsFilePutConf(fp, "password", line);

    cupsdSetStringf(job->auth_env + 1, "AUTH_PASSWORD=%s", con->password);
  }

#ifdef HAVE_GSSAPI
  if (con->gss_uid > 0)
  {
    cupsFilePrintf(fp, "uid %d\n", (int)con->gss_uid);
    cupsdSetStringf(&job->auth_uid, "AUTH_UID=%d", (int)con->gss_uid);
  }
#endif /* HAVE_GSSAPI */

 /*
  * Write a random number of newlines to the end of the file...
  */

  for (i = (CUPS_RAND() % 1024); i >= 0; i --)
    cupsFilePutChar(fp, '\n');

 /*
  * Close the file and return...
  */

  cupsFileClose(fp);
}


/*
 * 'send_document()' - Send a file to a printer or class.
 */

static void
send_document(cupsd_client_t  *con,     /* I - Client connection */
              ipp_attribute_t *uri)     /* I - Printer URI */
{
  ipp_attribute_t       *attr;          /* Current attribute */
  ipp_attribute_t       *format;        /* Request's document-format attribute */
  ipp_attribute_t       *jformat;       /* Job's document-format attribute */
  const char            *default_format;/* document-format-default value */
  int                   jobid;          /* Job ID number */
  cupsd_job_t           *job;           /* Current job */
  char                  job_uri[HTTP_MAX_URI],
                                        /* Job URI */
                        scheme[HTTP_MAX_URI],
                                        /* Method portion of URI */
                        username[HTTP_MAX_URI],
                                        /* Username portion of URI */
                        host[HTTP_MAX_URI],
                                        /* Host portion of URI */
                        resource[HTTP_MAX_URI];
                                        /* Resource portion of URI */
  int                   port;           /* Port portion of URI */
  mime_type_t           *filetype;      /* Type of file */
  char                  super[MIME_MAX_SUPER],
                                        /* Supertype of file */
                        type[MIME_MAX_TYPE],
                                        /* Subtype of file */
                        mimetype[MIME_MAX_SUPER + MIME_MAX_TYPE + 2];
                                        /* Textual name of mime type */
  char                  filename[1024]; /* Job filename */
  cupsd_printer_t       *printer;       /* Current printer */
  struct stat           fileinfo;       /* File information */
  int                   kbytes;         /* Size of file */
  int                   compression;    /* Type of compression */
  int                   start_job;      /* Start the job? */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "send_document(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * See if we have a job URI or a printer URI...
  */

  if (!strcmp(uri->name, "printer-uri"))
  {
   /*
    * Got a printer URI; see if we also have a job-id attribute...
    */

    if ((attr = ippFindAttribute(con->request, "job-id",
                                 IPP_TAG_INTEGER)) == NULL)
    {
      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Got a printer-uri attribute but no job-id."));
      return;
    }

    jobid = attr->values[0].integer;
  }
  else
  {
   /*
    * Got a job URI; parse it to get the job ID...
    */

    httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text, scheme,
                    sizeof(scheme), username, sizeof(username), host,
                    sizeof(host), &port, resource, sizeof(resource));

    if (strncmp(resource, "/jobs/", 6))
    {
     /*
      * Not a valid URI!
      */

      send_ipp_status(con, IPP_BAD_REQUEST, _("Bad job-uri \"%s\"."),
                      uri->values[0].string.text);
      return;
    }

    jobid = atoi(resource + 6);
  }

 /*
  * See if the job exists...
  */

  if ((job = cupsdFindJob(jobid)) == NULL)
  {
   /*
    * Nope - return a "not found" error...
    */

    send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."), jobid);
    return;
  }

  printer = cupsdFindDest(job->dest);

 /*
  * See if the job is owned by the requesting user...
  */

  if (!validate_user(job, con, job->username, username, sizeof(username)))
  {
    send_http_error(con, con->username[0] ? HTTP_FORBIDDEN : HTTP_UNAUTHORIZED,
                    cupsdFindDest(job->dest));
    return;
  }

 /*
  * OK, see if the client is sending the document compressed - CUPS
  * only supports "none" and "gzip".
  */

  compression = CUPS_FILE_NONE;

  if ((attr = ippFindAttribute(con->request, "compression",
                               IPP_TAG_KEYWORD)) != NULL)
  {
    if (strcmp(attr->values[0].string.text, "none")
#ifdef HAVE_LIBZ
        && strcmp(attr->values[0].string.text, "gzip")
#endif /* HAVE_LIBZ */
      )
    {
      send_ipp_status(con, IPP_ATTRIBUTES, _("Unsupported compression \"%s\"."),
                      attr->values[0].string.text);
      ippAddString(con->response, IPP_TAG_UNSUPPORTED_GROUP, IPP_TAG_KEYWORD,
                   "compression", NULL, attr->values[0].string.text);
      return;
    }

#ifdef HAVE_LIBZ
    if (!strcmp(attr->values[0].string.text, "gzip"))
      compression = CUPS_FILE_GZIP;
#endif /* HAVE_LIBZ */
  }

 /*
  * Do we have a file to print?
  */

  if ((attr = ippFindAttribute(con->request, "last-document",
                               IPP_TAG_BOOLEAN)) == NULL)
  {
    send_ipp_status(con, IPP_BAD_REQUEST,
                    _("Missing last-document attribute in request."));
    return;
  }

  if (!con->filename)
  {
   /*
    * Check for an empty request with "last-document" set to true, which is
    * used to close an "open" job by RFC 2911, section 3.3.2.
    */

    if (job->num_files > 0 && attr->values[0].boolean)
      goto last_document;

    send_ipp_status(con, IPP_BAD_REQUEST, _("No file in print request."));
    return;
  }

 /*
  * Is it a format we support?
  */

  if ((format = ippFindAttribute(con->request, "document-format",
                                 IPP_TAG_MIMETYPE)) != NULL)
  {
   /*
    * Grab format from client...
    */

    if (sscanf(format->values[0].string.text, "%15[^/]/%31[^;]",
               super, type) != 2)
    {
      send_ipp_status(con, IPP_BAD_REQUEST, _("Bad document-format \"%s\"."),
                      format->values[0].string.text);
      return;
    }
  }
  else if ((default_format = cupsGetOption("document-format",
                                           printer->num_options,
                                           printer->options)) != NULL)
  {
   /*
    * Use default document format...
    */

    if (sscanf(default_format, "%15[^/]/%31[^;]", super, type) != 2)
    {
      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Bad document-format-default \"%s\"."), default_format);
      return;
    }
  }
  else
  {
   /*
    * No document format attribute?  Auto-type it!
    */

    strcpy(super, "application");
    strcpy(type, "octet-stream");
  }

  if (!strcmp(super, "application") && !strcmp(type, "octet-stream"))
  {
   /*
    * Auto-type the file...
    */

    ipp_attribute_t     *doc_name;      /* document-name attribute */


    cupsdLogJob(job, CUPSD_LOG_DEBUG, "Auto-typing file...");

    doc_name = ippFindAttribute(con->request, "document-name", IPP_TAG_NAME);
    filetype = mimeFileType(MimeDatabase, con->filename,
                            doc_name ? doc_name->values[0].string.text : NULL,
                            &compression);

    if (!filetype)
      filetype = mimeType(MimeDatabase, super, type);

    if (filetype)
      cupsdLogJob(job, CUPSD_LOG_DEBUG, "Request file type is %s/%s.",
                  filetype->super, filetype->type);
  }
  else
    filetype = mimeType(MimeDatabase, super, type);

  if (filetype)
  {
   /*
    * Replace the document-format attribute value with the auto-typed or
    * default one.
    */

    snprintf(mimetype, sizeof(mimetype), "%s/%s", filetype->super,
             filetype->type);

    if ((jformat = ippFindAttribute(job->attrs, "document-format",
                                    IPP_TAG_MIMETYPE)) != NULL)
    {
      _cupsStrFree(jformat->values[0].string.text);

      jformat->values[0].string.text = _cupsStrAlloc(mimetype);
    }
    else
      ippAddString(job->attrs, IPP_TAG_JOB, IPP_TAG_MIMETYPE,
                   "document-format", NULL, mimetype);
  }
  else if (!filetype)
  {
    send_ipp_status(con, IPP_DOCUMENT_FORMAT,
                    _("Unsupported document-format \"%s/%s\"."), super, type);
    cupsdLogMessage(CUPSD_LOG_INFO,
                    "Hint: Do you have the raw file printing rules enabled?");

    if (format)
      ippAddString(con->response, IPP_TAG_UNSUPPORTED_GROUP, IPP_TAG_MIMETYPE,
                   "document-format", NULL, format->values[0].string.text);

    return;
  }

  if (printer->filetypes && !cupsArrayFind(printer->filetypes, filetype))
  {
    snprintf(mimetype, sizeof(mimetype), "%s/%s", filetype->super,
             filetype->type);

    send_ipp_status(con, IPP_DOCUMENT_FORMAT,
                    _("Unsupported document-format \"%s\"."), mimetype);

    ippAddString(con->response, IPP_TAG_UNSUPPORTED_GROUP, IPP_TAG_MIMETYPE,
                 "document-format", NULL, mimetype);

    return;
  }

 /*
  * Add the file to the job...
  */

  cupsdLoadJob(job);

  if (add_file(con, job, filetype, compression))
    return;

  if (stat(con->filename, &fileinfo))
    kbytes = 0;
  else
    kbytes = (fileinfo.st_size + 1023) / 1024;

  cupsdUpdateQuota(printer, job->username, 0, kbytes);

  if ((attr = ippFindAttribute(job->attrs, "job-k-octets",
                               IPP_TAG_INTEGER)) != NULL)
    attr->values[0].integer += kbytes;

  snprintf(filename, sizeof(filename), "%s/d%05d-%03d", RequestRoot, job->id,
           job->num_files);
  rename(con->filename, filename);

  cupsdClearString(&con->filename);

  cupsdLogJob(job, CUPSD_LOG_INFO, "File of type %s/%s queued by \"%s\".",
              filetype->super, filetype->type, job->username);

 /*
  * Start the job if this is the last document...
  */

  last_document:

  if ((attr = ippFindAttribute(con->request, "last-document",
                               IPP_TAG_BOOLEAN)) != NULL &&
      attr->values[0].boolean)
  {
   /*
    * See if we need to add the ending sheet...
    */

    if (cupsdTimeoutJob(job))
      return;

    if (job->state_value == IPP_JOB_STOPPED)
    {
      job->state->values[0].integer = IPP_JOB_PENDING;
      job->state_value              = IPP_JOB_PENDING;

      ippSetString(job->attrs, &job->reasons, 0, "none");
    }
    else if (job->state_value == IPP_JOB_HELD)
    {
      if ((attr = ippFindAttribute(job->attrs, "job-hold-until",
                                   IPP_TAG_KEYWORD)) == NULL)
        attr = ippFindAttribute(job->attrs, "job-hold-until", IPP_TAG_NAME);

      if (!attr || !strcmp(attr->values[0].string.text, "no-hold"))
      {
        job->state->values[0].integer = IPP_JOB_PENDING;
        job->state_value              = IPP_JOB_PENDING;

        ippSetString(job->attrs, &job->reasons, 0, "none");
      }
      else
        ippSetString(job->attrs, &job->reasons, 0, "job-hold-until-specified");
    }

    job->dirty = 1;
    cupsdMarkDirty(CUPSD_DIRTY_JOBS);

    start_job = 1;
  }
  else
  {
    if ((attr = ippFindAttribute(job->attrs, "job-hold-until",
                                 IPP_TAG_KEYWORD)) == NULL)
      attr = ippFindAttribute(job->attrs, "job-hold-until", IPP_TAG_NAME);

    if (!attr || !strcmp(attr->values[0].string.text, "no-hold"))
    {
      job->state->values[0].integer = IPP_JOB_HELD;
      job->state_value              = IPP_JOB_HELD;
      job->hold_until               = time(NULL) + MultipleOperationTimeout;

      ippSetString(job->attrs, &job->reasons, 0, "job-incoming");

      job->dirty = 1;
      cupsdMarkDirty(CUPSD_DIRTY_JOBS);
    }

    start_job = 0;
  }

 /*
  * Fill in the response info...
  */

  httpAssembleURIf(HTTP_URI_CODING_ALL, job_uri, sizeof(job_uri), "ipp", NULL,
                   con->servername, con->serverport, "/jobs/%d", jobid);
  ippAddString(con->response, IPP_TAG_JOB, IPP_TAG_URI, "job-uri", NULL,
               job_uri);

  ippAddInteger(con->response, IPP_TAG_JOB, IPP_TAG_INTEGER, "job-id", jobid);

  ippAddInteger(con->response, IPP_TAG_JOB, IPP_TAG_ENUM, "job-state",
                job->state_value);
  ippAddString(con->response, IPP_TAG_JOB, IPP_TAG_KEYWORD, "job-state-reasons",
               NULL, job->reasons->values[0].string.text);

  con->response->request.status.status_code = IPP_OK;

 /*
  * Start the job if necessary...
  */

  if (start_job)
    cupsdCheckJobs();
}


/*
 * 'send_http_error()' - Send a HTTP error back to the IPP client.
 */

static void
send_http_error(
    cupsd_client_t  *con,               /* I - Client connection */
    http_status_t   status,             /* I - HTTP status code */
    cupsd_printer_t *printer)           /* I - Printer, if any */
{
  ipp_attribute_t       *uri;           /* Request URI, if any */


  if ((uri = ippFindAttribute(con->request, "printer-uri",
                              IPP_TAG_URI)) == NULL)
    uri = ippFindAttribute(con->request, "job-uri", IPP_TAG_URI);

  cupsdLogMessage(status == HTTP_FORBIDDEN ? CUPSD_LOG_ERROR : CUPSD_LOG_DEBUG,
                  "Returning HTTP %s for %s (%s) from %s",
                  httpStatus(status),
                  con->request ?
                      ippOpString(con->request->request.op.operation_id) :
                      "no operation-id",
                  uri ? uri->values[0].string.text : "no URI",
                  con->http.hostname);

  if (printer)
  {
    int         auth_type;              /* Type of authentication required */


    auth_type = CUPSD_AUTH_NONE;

    if (status == HTTP_UNAUTHORIZED &&
        printer->num_auth_info_required > 0 &&
        !strcmp(printer->auth_info_required[0], "negotiate") &&
        con->request &&
        (con->request->request.op.operation_id == IPP_PRINT_JOB ||
         con->request->request.op.operation_id == IPP_CREATE_JOB ||
         con->request->request.op.operation_id == CUPS_AUTHENTICATE_JOB))
    {
     /*
      * Creating and authenticating jobs requires Kerberos...
      */

      auth_type = CUPSD_AUTH_NEGOTIATE;
    }
    else
    {
     /*
      * Use policy/location-defined authentication requirements...
      */

      char      resource[HTTP_MAX_URI]; /* Resource portion of URI */
      cupsd_location_t *auth;           /* Pointer to authentication element */


      if (printer->type & CUPS_PRINTER_CLASS)
        snprintf(resource, sizeof(resource), "/classes/%s", printer->name);
      else
        snprintf(resource, sizeof(resource), "/printers/%s", printer->name);

      if ((auth = cupsdFindBest(resource, HTTP_POST)) == NULL ||
          auth->type == CUPSD_AUTH_NONE)
        auth = cupsdFindPolicyOp(printer->op_policy_ptr,
                                 con->request ?
                                     con->request->request.op.operation_id :
                                     IPP_PRINT_JOB);

      if (auth)
      {
        if (auth->type == CUPSD_AUTH_DEFAULT)
          auth_type = cupsdDefaultAuthType();
        else
          auth_type = auth->type;
      }
    }

    cupsdSendError(con, status, auth_type);
  }
  else
    cupsdSendError(con, status, CUPSD_AUTH_NONE);

  ippDelete(con->response);
  con->response = NULL;

  return;
}


/*
 * 'send_ipp_status()' - Send a status back to the IPP client.
 */

static void
send_ipp_status(cupsd_client_t *con,    /* I - Client connection */
                ipp_status_t   status,  /* I - IPP status code */
                const char     *message,/* I - Status message */
                ...)                    /* I - Additional args as needed */
{
  va_list       ap;                     /* Pointer to additional args */
  char          formatted[1024];        /* Formatted errror message */


  va_start(ap, message);
  vsnprintf(formatted, sizeof(formatted),
            _cupsLangString(con->language, message), ap);
  va_end(ap);

  cupsdLogMessage(CUPSD_LOG_DEBUG, "%s %s: %s",
                  ippOpString(con->request->request.op.operation_id),
                  ippErrorString(status), formatted);

  con->response->request.status.status_code = status;

  if (ippFindAttribute(con->response, "attributes-charset",
                       IPP_TAG_ZERO) == NULL)
    ippAddString(con->response, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
                 "attributes-charset", NULL, "utf-8");

  if (ippFindAttribute(con->response, "attributes-natural-language",
                       IPP_TAG_ZERO) == NULL)
    ippAddString(con->response, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
                 "attributes-natural-language", NULL, DefaultLanguage);

  ippAddString(con->response, IPP_TAG_OPERATION, IPP_TAG_TEXT,
               "status-message", NULL, formatted);
}


/*
 * 'set_default()' - Set the default destination...
 */

static void
set_default(cupsd_client_t  *con,       /* I - Client connection */
            ipp_attribute_t *uri)       /* I - Printer URI */
{
  http_status_t         status;         /* Policy status */
  cups_ptype_t          dtype;          /* Destination type (printer/class) */
  cupsd_printer_t       *printer,       /* Printer */
                        *oldprinter;    /* Old default printer */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "set_default(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Is the destination valid?
  */

  if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(DefaultPolicyPtr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, NULL);
    return;
  }

 /*
  * Set it as the default...
  */

  oldprinter     = DefaultPrinter;
  DefaultPrinter = printer;

  if (oldprinter)
    cupsdAddEvent(CUPSD_EVENT_PRINTER_STATE, oldprinter, NULL,
                  "%s is no longer the default printer.", oldprinter->name);

  cupsdAddEvent(CUPSD_EVENT_PRINTER_STATE, printer, NULL,
                "%s is now the default printer.", printer->name);

  cupsdMarkDirty(CUPSD_DIRTY_PRINTERS | CUPSD_DIRTY_CLASSES |
                 CUPSD_DIRTY_PRINTCAP);

  cupsdLogMessage(CUPSD_LOG_INFO,
                  "Default destination set to \"%s\" by \"%s\".",
                  printer->name, get_username(con));

 /*
  * Everything was ok, so return OK status...
  */

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'set_job_attrs()' - Set job attributes.
 */

static void
set_job_attrs(cupsd_client_t  *con,     /* I - Client connection */
              ipp_attribute_t *uri)     /* I - Job URI */
{
  ipp_attribute_t       *attr,          /* Current attribute */
                        *attr2;         /* Job attribute */
  int                   jobid;          /* Job ID */
  cupsd_job_t           *job;           /* Current job */
  char                  scheme[HTTP_MAX_URI],
                                        /* Method portion of URI */
                        username[HTTP_MAX_URI],
                                        /* Username portion of URI */
                        host[HTTP_MAX_URI],
                                        /* Host portion of URI */
                        resource[HTTP_MAX_URI];
                                        /* Resource portion of URI */
  int                   port;           /* Port portion of URI */
  int                   event;          /* Events? */
  int                   check_jobs;     /* Check jobs? */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "set_job_attrs(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Start with "everything is OK" status...
  */

  con->response->request.status.status_code = IPP_OK;

 /*
  * See if we have a job URI or a printer URI...
  */

  if (!strcmp(uri->name, "printer-uri"))
  {
   /*
    * Got a printer URI; see if we also have a job-id attribute...
    */

    if ((attr = ippFindAttribute(con->request, "job-id",
                                 IPP_TAG_INTEGER)) == NULL)
    {
      send_ipp_status(con, IPP_BAD_REQUEST,
                      _("Got a printer-uri attribute but no job-id."));
      return;
    }

    jobid = attr->values[0].integer;
  }
  else
  {
   /*
    * Got a job URI; parse it to get the job ID...
    */

    httpSeparateURI(HTTP_URI_CODING_ALL, uri->values[0].string.text, scheme,
                    sizeof(scheme), username, sizeof(username), host,
                    sizeof(host), &port, resource, sizeof(resource));

    if (strncmp(resource, "/jobs/", 6))
    {
     /*
      * Not a valid URI!
      */

      send_ipp_status(con, IPP_BAD_REQUEST, _("Bad job-uri \"%s\"."),
                      uri->values[0].string.text);
      return;
    }

    jobid = atoi(resource + 6);
  }

 /*
  * See if the job exists...
  */

  if ((job = cupsdFindJob(jobid)) == NULL)
  {
   /*
    * Nope - return a "not found" error...
    */

    send_ipp_status(con, IPP_NOT_FOUND, _("Job #%d does not exist."), jobid);
    return;
  }

 /*
  * See if the job has been completed...
  */

  if (job->state_value > IPP_JOB_STOPPED)
  {
   /*
    * Return a "not-possible" error...
    */

    send_ipp_status(con, IPP_NOT_POSSIBLE,
                    _("Job #%d is finished and cannot be altered."), jobid);
    return;
  }

 /*
  * See if the job is owned by the requesting user...
  */

  if (!validate_user(job, con, job->username, username, sizeof(username)))
  {
    send_http_error(con, con->username[0] ? HTTP_FORBIDDEN : HTTP_UNAUTHORIZED,
                    cupsdFindDest(job->dest));
    return;
  }

 /*
  * See what the user wants to change.
  */

  cupsdLoadJob(job);

  check_jobs = 0;
  event      = 0;

  for (attr = con->request->attrs; attr; attr = attr->next)
  {
    if (attr->group_tag != IPP_TAG_JOB || !attr->name)
      continue;

    if (!strcmp(attr->name, "attributes-charset") ||
        !strcmp(attr->name, "attributes-natural-language") ||
        !strcmp(attr->name, "document-compression") ||
        !strcmp(attr->name, "document-format") ||
        !strcmp(attr->name, "job-detailed-status-messages") ||
        !strcmp(attr->name, "job-document-access-errors") ||
        !strcmp(attr->name, "job-id") ||
        !strcmp(attr->name, "job-impressions-completed") ||
        !strcmp(attr->name, "job-k-octets") ||
        !strcmp(attr->name, "job-originating-host-name") ||
        !strcmp(attr->name, "job-originating-user-name") ||
        !strcmp(attr->name, "job-printer-up-time") ||
        !strcmp(attr->name, "job-printer-uri") ||
        !strcmp(attr->name, "job-sheets") ||
        !strcmp(attr->name, "job-state-message") ||
        !strcmp(attr->name, "job-state-reasons") ||
        !strcmp(attr->name, "job-uri") ||
        !strcmp(attr->name, "number-of-documents") ||
        !strcmp(attr->name, "number-of-intervening-jobs") ||
        !strcmp(attr->name, "output-device-assigned") ||
        !strncmp(attr->name, "date-time-at-", 13) ||
        !strncmp(attr->name, "job-k-octets", 12) ||
        !strncmp(attr->name, "job-media-sheets", 16) ||
        !strncmp(attr->name, "time-at-", 8))
    {
     /*
      * Read-only attrs!
      */

      send_ipp_status(con, IPP_ATTRIBUTES_NOT_SETTABLE,
                      _("%s cannot be changed."), attr->name);

      attr2 = ippCopyAttribute(con->response, attr, 0);
      ippSetGroupTag(con->response, &attr2, IPP_TAG_UNSUPPORTED_GROUP);
      continue;
    }

    if (!strcmp(attr->name, "job-priority"))
    {
     /*
      * Change the job priority...
      */

      if (attr->value_tag != IPP_TAG_INTEGER)
      {
        send_ipp_status(con, IPP_REQUEST_VALUE, _("Bad job-priority value."));

        attr2 = ippCopyAttribute(con->response, attr, 0);
        ippSetGroupTag(con->response, &attr2, IPP_TAG_UNSUPPORTED_GROUP);
      }
      else if (job->state_value >= IPP_JOB_PROCESSING)
      {
        send_ipp_status(con, IPP_NOT_POSSIBLE,
                        _("Job is completed and cannot be changed."));
        return;
      }
      else if (con->response->request.status.status_code == IPP_OK)
      {
        cupsdLogJob(job, CUPSD_LOG_DEBUG, "Setting job-priority to %d",
                    attr->values[0].integer);
        cupsdSetJobPriority(job, attr->values[0].integer);

        check_jobs = 1;
        event      |= CUPSD_EVENT_JOB_CONFIG_CHANGED |
                      CUPSD_EVENT_PRINTER_QUEUE_ORDER_CHANGED;
      }
    }
    else if (!strcmp(attr->name, "job-state"))
    {
     /*
      * Change the job state...
      */

      if (attr->value_tag != IPP_TAG_ENUM)
      {
        send_ipp_status(con, IPP_REQUEST_VALUE, _("Bad job-state value."));

        attr2 = ippCopyAttribute(con->response, attr, 0);
        ippSetGroupTag(con->response, &attr2, IPP_TAG_UNSUPPORTED_GROUP);
      }
      else
      {
        switch (attr->values[0].integer)
        {
          case IPP_JOB_PENDING :
          case IPP_JOB_HELD :
              if (job->state_value > IPP_JOB_HELD)
              {
                send_ipp_status(con, IPP_NOT_POSSIBLE,
                                _("Job state cannot be changed."));
                return;
              }
              else if (con->response->request.status.status_code == IPP_OK)
              {
                cupsdLogJob(job, CUPSD_LOG_DEBUG, "Setting job-state to %d",
                            attr->values[0].integer);
                cupsdSetJobState(job, attr->values[0].integer,
                                 CUPSD_JOB_DEFAULT,
                                 "Job state changed by \"%s\"", username);
                check_jobs = 1;
              }
              break;

          case IPP_JOB_PROCESSING :
          case IPP_JOB_STOPPED :
              if (job->state_value != attr->values[0].integer)
              {
                send_ipp_status(con, IPP_NOT_POSSIBLE,
                                _("Job state cannot be changed."));
                return;
              }
              break;

          case IPP_JOB_CANCELED :
          case IPP_JOB_ABORTED :
          case IPP_JOB_COMPLETED :
              if (job->state_value > IPP_JOB_PROCESSING)
              {
                send_ipp_status(con, IPP_NOT_POSSIBLE,
                                _("Job state cannot be changed."));
                return;
              }
              else if (con->response->request.status.status_code == IPP_OK)
              {
                cupsdLogJob(job, CUPSD_LOG_DEBUG, "Setting job-state to %d",
                            attr->values[0].integer);
                cupsdSetJobState(job, (ipp_jstate_t)attr->values[0].integer,
                                 CUPSD_JOB_DEFAULT,
                                 "Job state changed by \"%s\"", username);
                check_jobs = 1;
              }
              break;
        }
      }
    }
    else if (con->response->request.status.status_code != IPP_OK)
      continue;
    else if ((attr2 = ippFindAttribute(job->attrs, attr->name,
                                       IPP_TAG_ZERO)) != NULL)
    {
     /*
      * Some other value; first free the old value...
      */

      if (job->attrs->prev)
        job->attrs->prev->next = attr2->next;
      else
        job->attrs->attrs = attr2->next;

      if (job->attrs->last == attr2)
        job->attrs->last = job->attrs->prev;

      ippDeleteAttribute(NULL, attr2);

     /*
      * Then copy the attribute...
      */

      ippCopyAttribute(job->attrs, attr, 0);

     /*
      * See if the job-name or job-hold-until is being changed.
      */

      if (!strcmp(attr->name, "job-hold-until"))
      {
        cupsdLogJob(job, CUPSD_LOG_DEBUG, "Setting job-hold-until to %s",
                    attr->values[0].string.text);
        cupsdSetJobHoldUntil(job, attr->values[0].string.text, 0);

        if (!strcmp(attr->values[0].string.text, "no-hold"))
        {
          cupsdReleaseJob(job);
          check_jobs = 1;
        }
        else
          cupsdSetJobState(job, IPP_JOB_HELD, CUPSD_JOB_DEFAULT,
                           "Job held by \"%s\".", username);

        event |= CUPSD_EVENT_JOB_CONFIG_CHANGED | CUPSD_EVENT_JOB_STATE;
      }
    }
    else if (attr->value_tag == IPP_TAG_DELETEATTR)
    {
     /*
      * Delete the attribute...
      */

      if ((attr2 = ippFindAttribute(job->attrs, attr->name,
                                    IPP_TAG_ZERO)) != NULL)
      {
        if (job->attrs->prev)
          job->attrs->prev->next = attr2->next;
        else
          job->attrs->attrs = attr2->next;

        if (attr2 == job->attrs->last)
          job->attrs->last = job->attrs->prev;

        ippDeleteAttribute(NULL, attr2);

        event |= CUPSD_EVENT_JOB_CONFIG_CHANGED;
      }
    }
    else
    {
     /*
      * Add new option by copying it...
      */

      ippCopyAttribute(job->attrs, attr, 0);

      event |= CUPSD_EVENT_JOB_CONFIG_CHANGED;
    }
  }

 /*
  * Save the job...
  */

  job->dirty = 1;
  cupsdMarkDirty(CUPSD_DIRTY_JOBS);

 /*
  * Send events as needed...
  */

  if (event & CUPSD_EVENT_PRINTER_QUEUE_ORDER_CHANGED)
    cupsdAddEvent(CUPSD_EVENT_PRINTER_QUEUE_ORDER_CHANGED,
                  cupsdFindDest(job->dest), job,
                  "Job priority changed by user.");

  if (event & CUPSD_EVENT_JOB_STATE)
    cupsdAddEvent(CUPSD_EVENT_JOB_STATE, cupsdFindDest(job->dest), job,
                  job->state_value == IPP_JOB_HELD ?
                      "Job held by user." : "Job restarted by user.");

  if (event & CUPSD_EVENT_JOB_CONFIG_CHANGED)
    cupsdAddEvent(CUPSD_EVENT_JOB_CONFIG_CHANGED, cupsdFindDest(job->dest), job,
                  "Job options changed by user.");

 /*
  * Start jobs if possible...
  */

  if (check_jobs)
    cupsdCheckJobs();
}


/*
 * 'set_printer_attrs()' - Set printer attributes.
 */

static void
set_printer_attrs(cupsd_client_t  *con, /* I - Client connection */
                  ipp_attribute_t *uri) /* I - Printer */
{
  http_status_t         status;         /* Policy status */
  cups_ptype_t          dtype;          /* Destination type (printer/class) */
  cupsd_printer_t       *printer;       /* Printer/class */
  ipp_attribute_t       *attr;          /* Printer attribute */
  int                   changed = 0;    /* Was anything changed? */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "set_printer_attrs(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Is the destination valid?
  */

  if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(printer->op_policy_ptr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, printer);
    return;
  }

 /*
  * Return a list of attributes that can be set via Set-Printer-Attributes.
  */

  if ((attr = ippFindAttribute(con->request, "printer-location",
                               IPP_TAG_TEXT)) != NULL)
  {
    cupsdSetString(&printer->location, attr->values[0].string.text);
    changed = 1;
  }

  if ((attr = ippFindAttribute(con->request, "printer-info",
                               IPP_TAG_TEXT)) != NULL)
  {
    cupsdSetString(&printer->info, attr->values[0].string.text);
    changed = 1;
  }

 /*
  * Update the printer attributes and return...
  */

  if (changed)
  {
    cupsdSetPrinterAttrs(printer);
    cupsdMarkDirty(CUPSD_DIRTY_PRINTERS);

    cupsdAddEvent(CUPSD_EVENT_PRINTER_CONFIG, printer, NULL,
                  "Printer \"%s\" description or location changed by \"%s\".",
                  printer->name, get_username(con));

    cupsdLogMessage(CUPSD_LOG_INFO,
                    "Printer \"%s\" description or location changed by \"%s\".",
                    printer->name, get_username(con));
  }

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'set_printer_defaults()' - Set printer default options from a request.
 */

static void
set_printer_defaults(
    cupsd_client_t  *con,               /* I - Client connection */
    cupsd_printer_t *printer)           /* I - Printer */
{
  int                   i;              /* Looping var */
  ipp_attribute_t       *attr;          /* Current attribute */
  int                   namelen;        /* Length of attribute name */
  char                  name[256],      /* New attribute name */
                        value[256];     /* String version of integer attrs */


  for (attr = con->request->attrs; attr; attr = attr->next)
  {
   /*
    * Skip non-printer attributes...
    */

    if (attr->group_tag != IPP_TAG_PRINTER || !attr->name)
      continue;

    cupsdLogMessage(CUPSD_LOG_DEBUG2, "set_printer_defaults: %s", attr->name);

    if (!strcmp(attr->name, "job-sheets-default"))
    {
     /*
      * Only allow keywords and names...
      */

      if (attr->value_tag != IPP_TAG_NAME && attr->value_tag != IPP_TAG_KEYWORD)
        continue;

     /*
      * Only allow job-sheets-default to be set when running without a
      * system high classification level...
      */

      if (Classification)
        continue;

      cupsdSetString(&printer->job_sheets[0], attr->values[0].string.text);

      if (attr->num_values > 1)
        cupsdSetString(&printer->job_sheets[1], attr->values[1].string.text);
      else
        cupsdSetString(&printer->job_sheets[1], "none");
    }
    else if (!strcmp(attr->name, "requesting-user-name-allowed"))
    {
      cupsdFreeStrings(&(printer->users));

      printer->deny_users = 0;

      if (attr->value_tag == IPP_TAG_NAME &&
          (attr->num_values > 1 ||
           strcmp(attr->values[0].string.text, "all")))
      {
        for (i = 0; i < attr->num_values; i ++)
          cupsdAddString(&(printer->users), attr->values[i].string.text);
      }
    }
    else if (!strcmp(attr->name, "requesting-user-name-denied"))
    {
      cupsdFreeStrings(&(printer->users));

      printer->deny_users = 1;

      if (attr->value_tag == IPP_TAG_NAME &&
          (attr->num_values > 1 ||
           strcmp(attr->values[0].string.text, "none")))
      {
        for (i = 0; i < attr->num_values; i ++)
          cupsdAddString(&(printer->users), attr->values[i].string.text);
      }
    }
    else if (!strcmp(attr->name, "job-quota-period"))
    {
      if (attr->value_tag != IPP_TAG_INTEGER)
        continue;

      cupsdLogMessage(CUPSD_LOG_DEBUG, "Setting job-quota-period to %d...",
                      attr->values[0].integer);
      cupsdFreeQuotas(printer);

      printer->quota_period = attr->values[0].integer;
    }
    else if (!strcmp(attr->name, "job-k-limit"))
    {
      if (attr->value_tag != IPP_TAG_INTEGER)
        continue;

      cupsdLogMessage(CUPSD_LOG_DEBUG, "Setting job-k-limit to %d...",
                      attr->values[0].integer);
      cupsdFreeQuotas(printer);

      printer->k_limit = attr->values[0].integer;
    }
    else if (!strcmp(attr->name, "job-page-limit"))
    {
      if (attr->value_tag != IPP_TAG_INTEGER)
        continue;

      cupsdLogMessage(CUPSD_LOG_DEBUG, "Setting job-page-limit to %d...",
                      attr->values[0].integer);
      cupsdFreeQuotas(printer);

      printer->page_limit = attr->values[0].integer;
    }
    else if (!strcmp(attr->name, "printer-op-policy"))
    {
      cupsd_policy_t *p;                /* Policy */


      if (attr->value_tag != IPP_TAG_NAME)
        continue;

      if ((p = cupsdFindPolicy(attr->values[0].string.text)) != NULL)
      {
        cupsdLogMessage(CUPSD_LOG_DEBUG,
                        "Setting printer-op-policy to \"%s\"...",
                        attr->values[0].string.text);
        cupsdSetString(&printer->op_policy, attr->values[0].string.text);
        printer->op_policy_ptr = p;
      }
      else
      {
        send_ipp_status(con, IPP_NOT_POSSIBLE,
                        _("Unknown printer-op-policy \"%s\"."),
                        attr->values[0].string.text);
        return;
      }
    }
    else if (!strcmp(attr->name, "printer-error-policy"))
    {
      if (attr->value_tag != IPP_TAG_NAME && attr->value_tag != IPP_TAG_KEYWORD)
        continue;

      if (strcmp(attr->values[0].string.text, "retry-current-job") &&
          ((printer->type & CUPS_PRINTER_CLASS) ||
           (strcmp(attr->values[0].string.text, "abort-job") &&
            strcmp(attr->values[0].string.text, "retry-job") &&
            strcmp(attr->values[0].string.text, "stop-printer"))))
      {
        send_ipp_status(con, IPP_NOT_POSSIBLE,
                        _("Unknown printer-error-policy \"%s\"."),
                        attr->values[0].string.text);
        return;
      }

      cupsdLogMessage(CUPSD_LOG_DEBUG,
                      "Setting printer-error-policy to \"%s\"...",
                      attr->values[0].string.text);
      cupsdSetString(&printer->error_policy, attr->values[0].string.text);
    }

   /*
    * Skip any other non-default attributes...
    */

    namelen = strlen(attr->name);
    if (namelen < 9 || strcmp(attr->name + namelen - 8, "-default") ||
        namelen > (sizeof(name) - 1) || attr->num_values != 1)
      continue;

   /*
    * OK, anything else must be a user-defined default...
    */

    strlcpy(name, attr->name, sizeof(name));
    name[namelen - 8] = '\0';           /* Strip "-default" */

    switch (attr->value_tag)
    {
      case IPP_TAG_DELETEATTR :
          printer->num_options = cupsRemoveOption(name,
                                                  printer->num_options,
                                                  &(printer->options));
          cupsdLogMessage(CUPSD_LOG_DEBUG,
                          "Deleting %s", attr->name);
          break;

      case IPP_TAG_NAME :
      case IPP_TAG_KEYWORD :
      case IPP_TAG_URI :
          printer->num_options = cupsAddOption(name,
                                               attr->values[0].string.text,
                                               printer->num_options,
                                               &(printer->options));
          cupsdLogMessage(CUPSD_LOG_DEBUG,
                          "Setting %s to \"%s\"...", attr->name,
                          attr->values[0].string.text);
          break;

      case IPP_TAG_BOOLEAN :
          printer->num_options = cupsAddOption(name,
                                               attr->values[0].boolean ?
                                                   "true" : "false",
                                               printer->num_options,
                                               &(printer->options));
          cupsdLogMessage(CUPSD_LOG_DEBUG,
                          "Setting %s to %s...", attr->name,
                          attr->values[0].boolean ? "true" : "false");
          break;

      case IPP_TAG_INTEGER :
      case IPP_TAG_ENUM :
          sprintf(value, "%d", attr->values[0].integer);
          printer->num_options = cupsAddOption(name, value,
                                               printer->num_options,
                                               &(printer->options));
          cupsdLogMessage(CUPSD_LOG_DEBUG,
                          "Setting %s to %s...", attr->name, value);
          break;

      case IPP_TAG_RANGE :
          sprintf(value, "%d-%d", attr->values[0].range.lower,
                  attr->values[0].range.upper);
          printer->num_options = cupsAddOption(name, value,
                                               printer->num_options,
                                               &(printer->options));
          cupsdLogMessage(CUPSD_LOG_DEBUG,
                          "Setting %s to %s...", attr->name, value);
          break;

      case IPP_TAG_RESOLUTION :
          sprintf(value, "%dx%d%s", attr->values[0].resolution.xres,
                  attr->values[0].resolution.yres,
                  attr->values[0].resolution.units == IPP_RES_PER_INCH ?
                      "dpi" : "dpcm");
          printer->num_options = cupsAddOption(name, value,
                                               printer->num_options,
                                               &(printer->options));
          cupsdLogMessage(CUPSD_LOG_DEBUG,
                          "Setting %s to %s...", attr->name, value);
          break;

      default :
          /* Do nothing for other values */
          break;
    }
  }
}


/*
 * 'start_printer()' - Start a printer.
 */

static void
start_printer(cupsd_client_t  *con,     /* I - Client connection */
              ipp_attribute_t *uri)     /* I - Printer URI */
{
  int                   i;              /* Temporary variable */
  http_status_t         status;         /* Policy status */
  cups_ptype_t          dtype;          /* Destination type (printer/class) */
  cupsd_printer_t       *printer;       /* Printer data */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "start_printer(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Is the destination valid?
  */

  if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(printer->op_policy_ptr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, printer);
    return;
  }

 /*
  * Start the printer...
  */

  printer->state_message[0] = '\0';

  cupsdStartPrinter(printer, 1);

  if (dtype & CUPS_PRINTER_CLASS)
    cupsdLogMessage(CUPSD_LOG_INFO, "Class \"%s\" started by \"%s\".",
                    printer->name, get_username(con));
  else
    cupsdLogMessage(CUPSD_LOG_INFO, "Printer \"%s\" started by \"%s\".",
                    printer->name, get_username(con));

  cupsdCheckJobs();

 /*
  * Check quotas...
  */

  if ((i = check_quotas(con, printer)) < 0)
  {
    send_ipp_status(con, IPP_NOT_POSSIBLE, _("Quota limit reached."));
    return;
  }
  else if (i == 0)
  {
    send_ipp_status(con, IPP_NOT_AUTHORIZED, _("Not allowed to print."));
    return;
  }

 /*
  * Everything was ok, so return OK status...
  */

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'stop_printer()' - Stop a printer.
 */

static void
stop_printer(cupsd_client_t  *con,      /* I - Client connection */
             ipp_attribute_t *uri)      /* I - Printer URI */
{
  http_status_t         status;         /* Policy status */
  cups_ptype_t          dtype;          /* Destination type (printer/class) */
  cupsd_printer_t       *printer;       /* Printer data */
  ipp_attribute_t       *attr;          /* printer-state-message attribute */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "stop_printer(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * Is the destination valid?
  */

  if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * Check policy...
  */

  if ((status = cupsdCheckPolicy(printer->op_policy_ptr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, printer);
    return;
  }

 /*
  * Stop the printer...
  */

  if ((attr = ippFindAttribute(con->request, "printer-state-message",
                               IPP_TAG_TEXT)) == NULL)
    strcpy(printer->state_message, "Paused");
  else
  {
    strlcpy(printer->state_message, attr->values[0].string.text,
            sizeof(printer->state_message));
  }

  cupsdStopPrinter(printer, 1);

  if (dtype & CUPS_PRINTER_CLASS)
    cupsdLogMessage(CUPSD_LOG_INFO, "Class \"%s\" stopped by \"%s\".",
                    printer->name, get_username(con));
  else
    cupsdLogMessage(CUPSD_LOG_INFO, "Printer \"%s\" stopped by \"%s\".",
                    printer->name, get_username(con));

 /*
  * Everything was ok, so return OK status...
  */

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'url_encode_attr()' - URL-encode a string attribute.
 */

static void
url_encode_attr(ipp_attribute_t *attr,  /* I - Attribute */
                char            *buffer,/* I - String buffer */
                int             bufsize)/* I - Size of buffer */
{
  int   i;                              /* Looping var */
  char  *bufptr,                        /* Pointer into buffer */
        *bufend;                        /* End of buffer */


  strlcpy(buffer, attr->name, bufsize);
  bufptr = buffer + strlen(buffer);
  bufend = buffer + bufsize - 1;

  for (i = 0; i < attr->num_values; i ++)
  {
    if (bufptr >= bufend)
      break;

    if (i)
      *bufptr++ = ',';
    else
      *bufptr++ = '=';

    if (bufptr >= bufend)
      break;

    *bufptr++ = '\'';

    bufptr = url_encode_string(attr->values[i].string.text,
                               bufptr, bufend - bufptr + 1);

    if (bufptr >= bufend)
      break;

    *bufptr++ = '\'';
  }

  *bufptr = '\0';
}


/*
 * 'url_encode_string()' - URL-encode a string.
 */

static char *                           /* O - End of string */
url_encode_string(const char *s,        /* I - String */
                  char       *buffer,   /* I - String buffer */
                  int        bufsize)   /* I - Size of buffer */
{
  char  *bufptr,                        /* Pointer into buffer */
        *bufend;                        /* End of buffer */
  static const char *hex = "0123456789ABCDEF";
                                        /* Hex digits */


  bufptr = buffer;
  bufend = buffer + bufsize - 1;

  while (*s && bufptr < bufend)
  {
    if (*s == ' ' || *s == '%' || *s == '+')
    {
      if (bufptr >= (bufend - 2))
        break;

      *bufptr++ = '%';
      *bufptr++ = hex[(*s >> 4) & 15];
      *bufptr++ = hex[*s & 15];

      s ++;
    }
    else if (*s == '\'' || *s == '\\')
    {
      if (bufptr >= (bufend - 1))
        break;

      *bufptr++ = '\\';
      *bufptr++ = *s++;
    }
    else
      *bufptr++ = *s++;
  }

  *bufptr = '\0';

  return (bufptr);
}


/*
 * 'user_allowed()' - See if a user is allowed to print to a queue.
 */

static int                              /* O - 0 if not allowed, 1 if allowed */
user_allowed(cupsd_printer_t *p,        /* I - Printer or class */
             const char      *username) /* I - Username */
{
  struct passwd *pw;                    /* User password data */
  char          baseuser[256],          /* Base username */
                *baseptr,               /* Pointer to "@" in base username */
                *name;                  /* Current user name */


  if (cupsArrayCount(p->users) == 0)
    return (1);

  if (!strcmp(username, "root"))
    return (1);

  if (strchr(username, '@'))
  {
   /*
    * Strip @REALM for username check...
    */

    strlcpy(baseuser, username, sizeof(baseuser));

    if ((baseptr = strchr(baseuser, '@')) != NULL)
      *baseptr = '\0';

    username = baseuser;
  }

  pw = getpwnam(username);
  endpwent();

  for (name = (char *)cupsArrayFirst(p->users);
       name;
       name = (char *)cupsArrayNext(p->users))
  {
    if (name[0] == '@')
    {
     /*
      * Check group membership...
      */

      if (cupsdCheckGroup(username, pw, name + 1))
        break;
    }
    else if (name[0] == '#')
    {
     /*
      * Check UUID...
      */

      if (cupsdCheckGroup(username, pw, name))
        break;
    }
    else if (!_cups_strcasecmp(username, name))
      break;
  }

  return ((name != NULL) != p->deny_users);
}


/*
 * 'validate_job()' - Validate printer options and destination.
 */

static void
validate_job(cupsd_client_t  *con,      /* I - Client connection */
             ipp_attribute_t *uri)      /* I - Printer URI */
{
  http_status_t         status;         /* Policy status */
  ipp_attribute_t       *attr,          /* Current attribute */
                        *auth_info;     /* auth-info attribute */
  ipp_attribute_t       *format;        /* Document-format attribute */
  cups_ptype_t          dtype;          /* Destination type (printer/class) */
  char                  super[MIME_MAX_SUPER],
                                        /* Supertype of file */
                        type[MIME_MAX_TYPE];
                                        /* Subtype of file */
  cupsd_printer_t       *printer;       /* Printer */


  cupsdLogMessage(CUPSD_LOG_DEBUG2, "validate_job(%p[%d], %s)", con,
                  con->http.fd, uri->values[0].string.text);

 /*
  * OK, see if the client is sending the document compressed - CUPS
  * doesn't support compression yet...
  */

  if ((attr = ippFindAttribute(con->request, "compression",
                               IPP_TAG_KEYWORD)) != NULL)
  {
    if (strcmp(attr->values[0].string.text, "none")
#ifdef HAVE_LIBZ
        && strcmp(attr->values[0].string.text, "gzip")
#endif /* HAVE_LIBZ */
      )
    {
      send_ipp_status(con, IPP_ATTRIBUTES,
                      _("Unsupported compression \"%s\"."),
                      attr->values[0].string.text);
      ippAddString(con->response, IPP_TAG_UNSUPPORTED_GROUP, IPP_TAG_KEYWORD,
                   "compression", NULL, attr->values[0].string.text);
      return;
    }
  }

 /*
  * Is it a format we support?
  */

  if ((format = ippFindAttribute(con->request, "document-format",
                                 IPP_TAG_MIMETYPE)) != NULL)
  {
    if (sscanf(format->values[0].string.text, "%15[^/]/%31[^;]",
               super, type) != 2)
    {
      send_ipp_status(con, IPP_BAD_REQUEST, _("Bad document-format \"%s\"."),
                      format->values[0].string.text);
      return;
    }

    if ((strcmp(super, "application") || strcmp(type, "octet-stream")) &&
        !mimeType(MimeDatabase, super, type))
    {
      cupsdLogMessage(CUPSD_LOG_INFO,
                      "Hint: Do you have the raw file printing rules enabled?");
      send_ipp_status(con, IPP_DOCUMENT_FORMAT,
                      _("Unsupported document-format \"%s\"."),
                      format->values[0].string.text);
      ippAddString(con->response, IPP_TAG_UNSUPPORTED_GROUP, IPP_TAG_MIMETYPE,
                   "document-format", NULL, format->values[0].string.text);
      return;
    }
  }

 /*
  * Is the destination valid?
  */

  if (!cupsdValidateDest(uri->values[0].string.text, &dtype, &printer))
  {
   /*
    * Bad URI...
    */

    send_ipp_status(con, IPP_NOT_FOUND,
                    _("The printer or class does not exist."));
    return;
  }

 /*
  * Check policy...
  */

  auth_info = ippFindAttribute(con->request, "auth-info", IPP_TAG_TEXT);

  if ((status = cupsdCheckPolicy(printer->op_policy_ptr, con, NULL)) != HTTP_OK)
  {
    send_http_error(con, status, printer);
    return;
  }
  else if (printer->num_auth_info_required == 1 &&
           !strcmp(printer->auth_info_required[0], "negotiate") &&
           !con->username[0])
  {
    send_http_error(con, HTTP_UNAUTHORIZED, printer);
    return;
  }
#ifdef HAVE_SSL
  else if (auth_info && !con->http.tls &&
           !httpAddrLocalhost(con->http.hostaddr))
  {
   /*
    * Require encryption of auth-info over non-local connections...
    */

    send_http_error(con, HTTP_UPGRADE_REQUIRED, printer);
    return;
  }
#endif /* HAVE_SSL */

 /*
  * Everything was ok, so return OK status...
  */

  con->response->request.status.status_code = IPP_OK;
}


/*
 * 'validate_name()' - Make sure the printer name only contains valid chars.
 */

static int                      /* O - 0 if name is no good, 1 if good */
validate_name(const char *name) /* I - Name to check */
{
  const char    *ptr;           /* Pointer into name */


 /*
  * Scan the whole name...
  */

  for (ptr = name; *ptr; ptr ++)
    if ((*ptr > 0 && *ptr <= ' ') || *ptr == 127 || *ptr == '/' || *ptr == '#')
      return (0);

 /*
  * All the characters are good; validate the length, too...
  */

  return ((ptr - name) < 128);
}


/*
 * 'validate_user()' - Validate the user for the request.
 */

static int                              /* O - 1 if permitted, 0 otherwise */
validate_user(cupsd_job_t    *job,      /* I - Job */
              cupsd_client_t *con,      /* I - Client connection */
              const char     *owner,    /* I - Owner of job/resource */
              char           *username, /* O - Authenticated username */
              int            userlen)   /* I - Length of username */
{
  cupsd_printer_t       *printer;       /* Printer for job */


  cupsdLogMessage(CUPSD_LOG_DEBUG2,
                  "validate_user(job=%d, con=%d, owner=\"%s\", username=%p, "
                  "userlen=%d)",
                  job->id, con ? con->http.fd : 0,
                  owner ? owner : "(null)", username, userlen);

 /*
  * Validate input...
  */

  if (!con || !owner || !username || userlen <= 0)
    return (0);

 /*
  * Get the best authenticated username that is available.
  */

  strlcpy(username, get_username(con), userlen);

 /*
  * Check the username against the owner...
  */

  printer = cupsdFindDest(job->dest);

  return (cupsdCheckPolicy(printer ? printer->op_policy_ptr : DefaultPolicyPtr,
                           con, owner) == HTTP_OK);
}


/*
 * End of "$Id: ipp.c 7944 2008-09-16 22:32:42Z mike $".
 */