scheduler/client.h

   1 /*
   2  * Client definitions for the CUPS scheduler.
   3  *
   4  * Copyright © 2020-2025 by OpenPrinting.
   5  * Copyright © 2007-2018 by Apple Inc.
   6  * Copyright © 1997-2007 by Easy Software Products, all rights reserved.
   7  *
   8  * Licensed under Apache License v2.0.  See the file "LICENSE" for more
   9  * information.
  10  */
  11
  12 #ifdef HAVE_AUTHORIZATION_H
  13 #  include <Security/Authorization.h>
  14 #endif /* HAVE_AUTHORIZATION_H */
  15
  16
  17 /*
  18  * HTTP client structure...
  19  */
  20
  21 struct cupsd_client_s
  22 {
  23   int                   number;         /* Connection number */
  24   http_t                *http;          /* HTTP client connection */
  25   ipp_t                 *request,       /* IPP request information */
  26                         *response;      /* IPP response information */
  27   cupsd_location_t      *best;          /* Best match for AAA */
  28   struct timeval        start;          /* Request start time */
  29   http_state_t          operation;      /* Request operation */
  30   off_t                 bytes;          /* Bytes transferred for this request */
  31   int                   is_browser;     /* Is the client a web browser? */
  32   int                   type;           /* AuthType for username */
  33   char                  username[HTTP_MAX_VALUE],
  34                                         /* Username from Authorization: line */
  35                         password[HTTP_MAX_VALUE],
  36                                         /* Password from Authorization: line */
  37                         email[HTTP_MAX_VALUE],
  38                                         /* EMail from OAuth Bearer token */
  39                         realname[HTTP_MAX_VALUE],
  40                                         /* Real name from OAuth Bearer token */
  41                         autherror[HTTP_MAX_VALUE],
  42                                         /* Authorization error, if any */
  43                         uri[2048],      /* Localized URL/URI for GET/PUT */
  44                         *filename,      /* Filename of output file */
  45                         *command,       /* Command to run */
  46                         *options,       /* Options for command */
  47                         *query_string;  /* QUERY_STRING environment variable */
  48   int                   file;           /* Input/output file */
  49   int                   file_ready;     /* Input ready on file/pipe? */
  50   int                   bg_pending;     /* Background response pending? */
  51   cupsd_printer_t       *bg_printer;    /* Background printer */
  52   int                   pipe_pid;       /* Pipe process ID (or 0 if not a pipe) */
  53   http_status_t         pipe_status;    /* HTTP status from pipe process */
  54   int                   sent_header,    /* Non-zero if sent HTTP header */
  55                         got_fields,     /* Non-zero if all fields seen */
  56                         header_used;    /* Number of header bytes used */
  57   char                  header[4096];   /* Header from CGI program */
  58   cups_lang_t           *language;      /* Language to use */
  59   int                   auto_ssl;       /* Automatic test for SSL/TLS */
  60   http_addr_t           clientaddr;     /* Client's server address */
  61   char                  clientname[256];/* Client's server name for connection */
  62   int                   clientport;     /* Client's server port for connection */
  63   char                  servername[256];/* Server name for connection */
  64   int                   serverport;     /* Server port for connection */
  65 #ifdef HAVE_GSSAPI
  66   int                   have_gss;       /* Have GSS credentials? */
  67   uid_t                 gss_uid;        /* User ID for local prints */
  68 #endif /* HAVE_GSSAPI */
  69 #ifdef HAVE_AUTHORIZATION_H
  70   AuthorizationRef      authref;        /* Authorization ref */
  71 #endif /* HAVE_AUTHORIZATION_H */
  72 };
  73
  74 #define HTTP(con) ((con)->http)
  75
  76
  77 /*
  78  * HTTP listener structure...
  79  */
  80
  81 typedef struct
  82 {
  83   int                   fd;             /* File descriptor for this server */
  84   http_addr_t           address;        /* Bind address of socket */
  85   http_encryption_t     encryption;     /* To encrypt or not to encrypt... */
  86 #ifdef HAVE_ONDEMAND
  87   int                   on_demand;      /* Is this a socket from launchd/systemd/upstart? */
  88 #endif /* HAVE_ONDEMAND */
  89 } cupsd_listener_t;
  90
  91
  92 /*
  93  * Globals...
  94  */
  95
  96 VAR int                 LastClientNumber VALUE(0),
  97                                         /* Last client connection number */
  98                         LocalPort       VALUE(631),
  99                                         /* Local port to use */
 100                         RemotePort      VALUE(0);
 101                                         /* Remote port to use */
 102 VAR http_encryption_t   LocalEncryption VALUE(HTTP_ENCRYPTION_IF_REQUESTED);
 103                                         /* Local port encryption to use */
 104 VAR cups_array_t        *Listeners      VALUE(NULL);
 105                                         /* Listening sockets */
 106 VAR time_t              ListeningPaused VALUE(0);
 107                                         /* Time when listening was paused */
 108 VAR cups_array_t        *Clients        VALUE(NULL),
 109                                         /* HTTP clients */
 110                         *ActiveClients  VALUE(NULL);
 111                                         /* Active HTTP clients */
 112 VAR char                *ServerHeader   VALUE(NULL);
 113                                         /* Server header in requests */
 114 VAR int                 CGIPipes[2]     VALUE2(-1,-1);
 115                                         /* Pipes for CGI error/debug output */
 116 VAR cupsd_statbuf_t     *CGIStatusBuffer VALUE(NULL);
 117                                         /* Status buffer for pipes */
 118
 119
 120 /*
 121  * Prototypes...
 122  */
 123
 124 extern void     cupsdAcceptClient(cupsd_listener_t *lis);
 125 extern void     cupsdCloseAllClients(void);
 126 extern int      cupsdCloseClient(cupsd_client_t *con);
 127 extern void     cupsdDeleteAllListeners(void);
 128 extern void     cupsdPauseListening(void);
 129 extern int      cupsdProcessIPPRequest(cupsd_client_t *con);
 130 extern void     cupsdReadClient(cupsd_client_t *con);
 131 extern void     cupsdResumeListening(void);
 132 extern int      cupsdSendCommand(cupsd_client_t *con, char *command,
 133                                  char *options, int root);
 134 extern int      cupsdSendError(cupsd_client_t *con, http_status_t code,
 135                                int auth_type);
 136 extern int      cupsdSendHeader(cupsd_client_t *con, http_status_t code,
 137                                 char *type, int auth_type);
 138 extern void     cupsdShutdownClient(cupsd_client_t *con);
 139 extern void     cupsdStartListening(void);
 140 extern void     cupsdStopListening(void);
 141 extern void     cupsdUpdateCGI(void);
 142 extern void     cupsdWriteClient(cupsd_client_t *con);
 143
 144 extern int      cupsdEndTLS(cupsd_client_t *con);
 145 extern int      cupsdStartTLS(cupsd_client_t *con);