cups/http.h

   1 /*
   2  * "$Id: http.h 5889 2006-08-24 21:44:35Z mike $"
   3  *
   4  *   Hyper-Text Transport Protocol definitions for the Common UNIX Printing
   5  *   System (CUPS).
   6  *
   7  *   Copyright 1997-2006 by Easy Software Products, all rights reserved.
   8  *
   9  *   These coded instructions, statements, and computer programs are the
  10  *   property of Easy Software Products and are protected by Federal
  11  *   copyright law.  Distribution and use rights are outlined in the file
  12  *   "LICENSE.txt" which should have been included with this file.  If this
  13  *   file is missing or damaged please contact Easy Software Products
  14  *   at:
  15  *
  16  *       Attn: CUPS Licensing Information
  17  *       Easy Software Products
  18  *       44141 Airport View Drive, Suite 204
  19  *       Hollywood, Maryland 20636 USA
  20  *
  21  *       Voice: (301) 373-9600
  22  *       EMail: cups-info@cups.org
  23  *         WWW: http://www.cups.org
  24  *
  25  *   This file is subject to the Apple OS-Developed Software exception.
  26  */
  27
  28 #ifndef _CUPS_HTTP_H_
  29 #  define _CUPS_HTTP_H_
  30
  31 /*
  32  * Include necessary headers...
  33  */
  34
  35 #  include <string.h>
  36 #  include <time.h>
  37 #  include <sys/types.h>
  38 #  ifdef WIN32
  39 #    include <winsock2.h>
  40 #    include <ws2tcpip.h>
  41 #  else
  42 #    ifdef __sgi
  43 #      define INET6                     /* IRIX IPv6 support... */
  44 #    endif /* __sgi */
  45 #    include <unistd.h>
  46 #    include <sys/time.h>
  47 #    include <sys/socket.h>
  48 #    include <netdb.h>
  49 #    include <netinet/in.h>
  50 #    include <arpa/inet.h>
  51 #    include <netinet/in_systm.h>
  52 #    include <netinet/ip.h>
  53 #    if !defined(__APPLE__) || !defined(TCP_NODELAY)
  54 #      include <netinet/tcp.h>
  55 #    endif /* !__APPLE__ || !TCP_NODELAY */
  56 #    if defined(AF_UNIX) && !defined(AF_LOCAL)
  57 #      define AF_LOCAL AF_UNIX          /* Older UNIX's have old names... */
  58 #    endif /* AF_UNIX && !AF_LOCAL */
  59 #    ifdef AF_LOCAL
  60 #      include <sys/un.h>
  61 #    endif /* AF_LOCAL */
  62 #  endif /* WIN32 */
  63
  64 #  include "md5.h"
  65
  66 /*
  67  * With GCC 3.0 and higher, we can mark old APIs "deprecated" so you get
  68  * a warning at compile-time.
  69  */
  70
  71 #  if defined(__GNUC__) && __GNUC__ > 2
  72 #    define _HTTP_DEPRECATED __attribute__ ((__deprecated__))
  73 #  else
  74 #    define _HTTP_DEPRECATED
  75 #  endif /* __GNUC__ && __GNUC__ > 2 */
  76
  77
  78 /*
  79  * C++ magic...
  80  */
  81
  82 #  ifdef __cplusplus
  83 extern "C" {
  84 #  endif /* __cplusplus */
  85
  86
  87 /*
  88  * Oh, the wonderful world of IPv6 compatibility.  Apparently some
  89  * implementations expose the (more logical) 32-bit address parts
  90  * to everyone, while others only expose it to kernel code...  To
  91  * make supporting IPv6 even easier, each vendor chose different
  92  * core structure and union names, so the same defines or code
  93  * can't be used on all platforms.
  94  *
  95  * The following will likely need tweaking on new platforms that
  96  * support IPv6 - the "s6_addr32" define maps to the 32-bit integer
  97  * array in the in6_addr union, which is named differently on various
  98  * platforms.
  99  */
 100
 101 #if defined(AF_INET6) && !defined(s6_addr32)
 102 #  if defined(__sun)
 103 #    define s6_addr32   _S6_un._S6_u32
 104 #  elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__)
 105 #    define s6_addr32   __u6_addr.__u6_addr32
 106 #  elif defined(__osf__)
 107 #    define s6_addr32   s6_un.sa6_laddr
 108 #  elif defined(WIN32)
 109 /*
 110  * Windows only defines byte and 16-bit word members of the union and
 111  * requires special casing of all raw address code...
 112  */
 113 #    define s6_addr32   error_need_win32_specific_code
 114 #  endif /* __sun */
 115 #endif /* AF_INET6 && !s6_addr32 */
 116
 117
 118 /*
 119  * Limits...
 120  */
 121
 122 #  define HTTP_MAX_URI          1024    /* Max length of URI string */
 123 #  define HTTP_MAX_HOST         256     /* Max length of hostname string */
 124 #  define HTTP_MAX_BUFFER       2048    /* Max length of data buffer */
 125 #  define HTTP_MAX_VALUE        256     /* Max header field value length */
 126
 127
 128 /*
 129  * Types and structures...
 130  */
 131
 132 typedef enum http_auth_e                /**** HTTP authentication types ****/
 133 {
 134   HTTP_AUTH_NONE,                       /* No authentication in use */
 135   HTTP_AUTH_BASIC,                      /* Basic authentication in use */
 136   HTTP_AUTH_MD5,                        /* Digest authentication in use */
 137   HTTP_AUTH_MD5_SESS,                   /* MD5-session authentication in use */
 138   HTTP_AUTH_MD5_INT,                    /* Digest authentication in use for body */
 139   HTTP_AUTH_MD5_SESS_INT                /* MD5-session authentication in use for body */
 140 } http_auth_t;
 141
 142 typedef enum http_encoding_e            /**** HTTP transfer encoding values ****/
 143 {
 144   HTTP_ENCODE_LENGTH,                   /* Data is sent with Content-Length */
 145   HTTP_ENCODE_CHUNKED,                  /* Data is chunked */
 146   HTTP_ENCODE_FIELDS                    /* Sending HTTP fields */
 147 } http_encoding_t;
 148
 149 typedef enum http_encryption_e          /**** HTTP encryption values ****/
 150 {
 151   HTTP_ENCRYPT_IF_REQUESTED,            /* Encrypt if requested (TLS upgrade) */
 152   HTTP_ENCRYPT_NEVER,                   /* Never encrypt */
 153   HTTP_ENCRYPT_REQUIRED,                /* Encryption is required (TLS upgrade) */
 154   HTTP_ENCRYPT_ALWAYS                   /* Always encrypt (SSL) */
 155 } http_encryption_t;
 156
 157 typedef enum http_field_e               /**** HTTP field names ****/
 158 {
 159   HTTP_FIELD_UNKNOWN = -1,              /* Unknown field */
 160   HTTP_FIELD_ACCEPT_LANGUAGE,           /* Accept-Language field */
 161   HTTP_FIELD_ACCEPT_RANGES,             /* Accept-Ranges field */
 162   HTTP_FIELD_AUTHORIZATION,             /* Authorization field */
 163   HTTP_FIELD_CONNECTION,                /* Connection field */
 164   HTTP_FIELD_CONTENT_ENCODING,          /* Content-Encoding field */
 165   HTTP_FIELD_CONTENT_LANGUAGE,          /* Content-Language field */
 166   HTTP_FIELD_CONTENT_LENGTH,            /* Content-Length field */
 167   HTTP_FIELD_CONTENT_LOCATION,          /* Content-Location field */
 168   HTTP_FIELD_CONTENT_MD5,               /* Content-MD5 field */
 169   HTTP_FIELD_CONTENT_RANGE,             /* Content-Range field */
 170   HTTP_FIELD_CONTENT_TYPE,              /* Content-Type field */
 171   HTTP_FIELD_CONTENT_VERSION,           /* Content-Version field */
 172   HTTP_FIELD_DATE,                      /* Date field */
 173   HTTP_FIELD_HOST,                      /* Host field */
 174   HTTP_FIELD_IF_MODIFIED_SINCE,         /* If-Modified-Since field */
 175   HTTP_FIELD_IF_UNMODIFIED_SINCE,       /* If-Unmodified-Since field */
 176   HTTP_FIELD_KEEP_ALIVE,                /* Keep-Alive field */
 177   HTTP_FIELD_LAST_MODIFIED,             /* Last-Modified field */
 178   HTTP_FIELD_LINK,                      /* Link field */
 179   HTTP_FIELD_LOCATION,                  /* Location field */
 180   HTTP_FIELD_RANGE,                     /* Range field */
 181   HTTP_FIELD_REFERER,                   /* Referer field */
 182   HTTP_FIELD_RETRY_AFTER,               /* Retry-After field */
 183   HTTP_FIELD_TRANSFER_ENCODING,         /* Transfer-Encoding field */
 184   HTTP_FIELD_UPGRADE,                   /* Upgrade field */
 185   HTTP_FIELD_USER_AGENT,                /* User-Agent field */
 186   HTTP_FIELD_WWW_AUTHENTICATE,          /* WWW-Authenticate field */
 187   HTTP_FIELD_MAX                        /* Maximum field index */
 188 } http_field_t;
 189
 190 typedef enum http_keepalive_e           /**** HTTP keep-alive values ****/
 191 {
 192   HTTP_KEEPALIVE_OFF = 0,               /* No keep alive support */
 193   HTTP_KEEPALIVE_ON                     /* Use keep alive */
 194 } http_keepalive_t;
 195
 196 typedef enum http_state_e               /**** HTTP state values; states
 197                                          **** are server-oriented...
 198                                          ****/
 199 {
 200   HTTP_WAITING,                         /* Waiting for command */
 201   HTTP_OPTIONS,                         /* OPTIONS command, waiting for blank line */
 202   HTTP_GET,                             /* GET command, waiting for blank line */
 203   HTTP_GET_SEND,                        /* GET command, sending data */
 204   HTTP_HEAD,                            /* HEAD command, waiting for blank line */
 205   HTTP_POST,                            /* POST command, waiting for blank line */
 206   HTTP_POST_RECV,                       /* POST command, receiving data */
 207   HTTP_POST_SEND,                       /* POST command, sending data */
 208   HTTP_PUT,                             /* PUT command, waiting for blank line */
 209   HTTP_PUT_RECV,                        /* PUT command, receiving data */
 210   HTTP_DELETE,                          /* DELETE command, waiting for blank line */
 211   HTTP_TRACE,                           /* TRACE command, waiting for blank line */
 212   HTTP_CLOSE,                           /* CLOSE command, waiting for blank line */
 213   HTTP_STATUS                           /* Command complete, sending status */
 214 } http_state_t;
 215
 216 typedef enum http_status_e              /**** HTTP status codes ****/
 217 {
 218   HTTP_ERROR = -1,                      /* An error response from httpXxxx() */
 219
 220   HTTP_CONTINUE = 100,                  /* Everything OK, keep going... */
 221   HTTP_SWITCHING_PROTOCOLS,             /* HTTP upgrade to TLS/SSL */
 222
 223   HTTP_OK = 200,                        /* OPTIONS/GET/HEAD/POST/TRACE command was successful */
 224   HTTP_CREATED,                         /* PUT command was successful */
 225   HTTP_ACCEPTED,                        /* DELETE command was successful */
 226   HTTP_NOT_AUTHORITATIVE,               /* Information isn't authoritative */
 227   HTTP_NO_CONTENT,                      /* Successful command, no new data */
 228   HTTP_RESET_CONTENT,                   /* Content was reset/recreated */
 229   HTTP_PARTIAL_CONTENT,                 /* Only a partial file was recieved/sent */
 230
 231   HTTP_MULTIPLE_CHOICES = 300,          /* Multiple files match request */
 232   HTTP_MOVED_PERMANENTLY,               /* Document has moved permanently */
 233   HTTP_MOVED_TEMPORARILY,               /* Document has moved temporarily */
 234   HTTP_SEE_OTHER,                       /* See this other link... */
 235   HTTP_NOT_MODIFIED,                    /* File not modified */
 236   HTTP_USE_PROXY,                       /* Must use a proxy to access this URI */
 237
 238   HTTP_BAD_REQUEST = 400,               /* Bad request */
 239   HTTP_UNAUTHORIZED,                    /* Unauthorized to access host */
 240   HTTP_PAYMENT_REQUIRED,                /* Payment required */
 241   HTTP_FORBIDDEN,                       /* Forbidden to access this URI */
 242   HTTP_NOT_FOUND,                       /* URI was not found */
 243   HTTP_METHOD_NOT_ALLOWED,              /* Method is not allowed */
 244   HTTP_NOT_ACCEPTABLE,                  /* Not Acceptable */
 245   HTTP_PROXY_AUTHENTICATION,            /* Proxy Authentication is Required */
 246   HTTP_REQUEST_TIMEOUT,                 /* Request timed out */
 247   HTTP_CONFLICT,                        /* Request is self-conflicting */
 248   HTTP_GONE,                            /* Server has gone away */
 249   HTTP_LENGTH_REQUIRED,                 /* A content length or encoding is required */
 250   HTTP_PRECONDITION,                    /* Precondition failed */
 251   HTTP_REQUEST_TOO_LARGE,               /* Request entity too large */
 252   HTTP_URI_TOO_LONG,                    /* URI too long */
 253   HTTP_UNSUPPORTED_MEDIATYPE,           /* The requested media type is unsupported */
 254   HTTP_REQUESTED_RANGE,                 /* The requested range is not satisfiable */
 255   HTTP_EXPECTATION_FAILED,              /* The expectation given in an Expect header field was not met */
 256   HTTP_UPGRADE_REQUIRED = 426,          /* Upgrade to SSL/TLS required */
 257
 258   HTTP_SERVER_ERROR = 500,              /* Internal server error */
 259   HTTP_NOT_IMPLEMENTED,                 /* Feature not implemented */
 260   HTTP_BAD_GATEWAY,                     /* Bad gateway */
 261   HTTP_SERVICE_UNAVAILABLE,             /* Service is unavailable */
 262   HTTP_GATEWAY_TIMEOUT,                 /* Gateway connection timed out */
 263   HTTP_NOT_SUPPORTED                    /* HTTP version not supported */
 264 } http_status_t;
 265
 266 typedef enum http_uri_status_e          /**** URI separation status @since CUPS1.2@ ****/
 267 {
 268   HTTP_URI_OVERFLOW = -8,               /* URI buffer for httpAssembleURI is too small */
 269   HTTP_URI_BAD_ARGUMENTS = -7,          /* Bad arguments to function (error) */
 270   HTTP_URI_BAD_RESOURCE = -6,           /* Bad resource in URI (error) */
 271   HTTP_URI_BAD_PORT = -5,               /* Bad port number in URI (error) */
 272   HTTP_URI_BAD_HOSTNAME = -4,           /* Bad hostname in URI (error) */
 273   HTTP_URI_BAD_USERNAME = -3,           /* Bad username in URI (error) */
 274   HTTP_URI_BAD_SCHEME = -2,             /* Bad scheme in URI (error) */
 275   HTTP_URI_BAD_URI = -1,                /* Bad/empty URI (error) */
 276   HTTP_URI_OK = 0,                      /* URI decoded OK */
 277   HTTP_URI_MISSING_SCHEME,              /* Missing scheme in URI (warning) */
 278   HTTP_URI_UNKNOWN_SCHEME,              /* Unknown scheme in URI (warning) */
 279   HTTP_URI_MISSING_RESOURCE             /* Missing resource in URI (warning) */
 280 } http_uri_status_t;
 281
 282 typedef enum http_uri_coding_e          /**** URI en/decode flags ****/
 283 {
 284   HTTP_URI_CODING_NONE = 0,             /* Don't en/decode anything */
 285   HTTP_URI_CODING_USERNAME = 1,         /* En/decode the username portion */
 286   HTTP_URI_CODING_HOSTNAME = 2,         /* En/decode the hostname portion */
 287   HTTP_URI_CODING_RESOURCE = 4,         /* En/decode the resource portion */
 288   HTTP_URI_CODING_MOST = 7,             /* En/decode all but the query */
 289   HTTP_URI_CODING_QUERY = 8,            /* En/decode the query portion */
 290   HTTP_URI_CODING_ALL = 15              /* En/decode everything */
 291 } http_uri_coding_t;
 292
 293 typedef enum http_version_e             /**** HTTP version numbers ****/
 294 {
 295   HTTP_0_9 = 9,                         /* HTTP/0.9 */
 296   HTTP_1_0 = 100,                       /* HTTP/1.0 */
 297   HTTP_1_1 = 101                        /* HTTP/1.1 */
 298 } http_version_t;
 299
 300 typedef union _http_addr_u              /**** Socket address union, which
 301                                          **** makes using IPv6 and other
 302                                          **** address types easier and
 303                                          **** more portable. @since CUPS 1.2@
 304                                          ****/
 305 {
 306   struct sockaddr       addr;           /* Base structure for family value */
 307   struct sockaddr_in    ipv4;           /* IPv4 address */
 308 #ifdef AF_INET6
 309   struct sockaddr_in6   ipv6;           /* IPv6 address */
 310 #endif /* AF_INET6 */
 311 #ifdef AF_LOCAL
 312   struct sockaddr_un    un;             /* Domain socket file */
 313 #endif /* AF_LOCAL */
 314   char                  pad[256];       /* Padding to ensure binary compatibility */
 315 } http_addr_t;
 316
 317 typedef struct http_addrlist_s          /**** Socket address list, which is
 318                                          **** used to enumerate all of the
 319                                          **** addresses that are associated
 320                                          **** with a hostname. @since CUPS 1.2@
 321                                          ****/
 322 {
 323   struct http_addrlist_s *next;         /* Pointer to next address in list */
 324   http_addr_t           addr;           /* Address */
 325 } http_addrlist_t;
 326
 327 typedef struct _http_s                  /**** HTTP connection structure. ****/
 328 {
 329  /*
 330   * DO NOT ACCESS MEMBERS OF THIS STRUCTURE DIRECTLY; INSTEAD, USE THE
 331   * PROVIDED APIS FOR ACCESSING THE VALUES INSTEAD.
 332   *
 333   * This structure definition will be removed from the public headers in
 334   * CUPS 1.3.
 335   */
 336
 337   int                   fd;             /* File descriptor for this socket */
 338   int                   blocking;       /* To block or not to block */
 339   int                   error;          /* Last error on read */
 340   time_t                activity;       /* Time since last read/write */
 341   http_state_t          state;          /* State of client */
 342   http_status_t         status;         /* Status of last request */
 343   http_version_t        version;        /* Protocol version */
 344   http_keepalive_t      keep_alive;     /* Keep-alive supported? */
 345   struct sockaddr_in    _hostaddr;      /* Address of connected host @deprecated@ */
 346   char                  hostname[HTTP_MAX_HOST],
 347                                         /* Name of connected host */
 348                         fields[HTTP_FIELD_MAX][HTTP_MAX_VALUE];
 349                                         /* Field values */
 350   char                  *data;          /* Pointer to data buffer */
 351   http_encoding_t       data_encoding;  /* Chunked or not */
 352   int                   _data_remaining;/* Number of bytes left @deprecated@ */
 353   int                   used;           /* Number of bytes used in buffer */
 354   char                  buffer[HTTP_MAX_BUFFER];
 355                                         /* Buffer for incoming data */
 356   int                   auth_type;      /* Authentication in use */
 357   _cups_md5_state_t     md5_state;      /* MD5 state */
 358   char                  nonce[HTTP_MAX_VALUE];
 359                                         /* Nonce value */
 360   int                   nonce_count;    /* Nonce count */
 361   void                  *tls;           /* TLS state information */
 362   http_encryption_t     encryption;     /* Encryption requirements */
 363   /**** New in CUPS 1.1.19 ****/
 364   fd_set                *input_set;     /* select() set for httpWait() @since CUPS 1.1.19@ */
 365   http_status_t         expect;         /* Expect: header @since CUPS 1.1.19@ */
 366   char                  *cookie;        /* Cookie value(s) @since CUPS 1.1.19@ */
 367   /**** New in CUPS 1.1.20 ****/
 368   char                  authstring[HTTP_MAX_VALUE],
 369                                         /* Current Authentication value @since CUPS 1.1.20@ */
 370                         userpass[HTTP_MAX_VALUE];
 371                                         /* Username:password string @since CUPS 1.1.20@ */
 372   int                   digest_tries;   /* Number of tries for digest auth @since CUPS 1.1.20@ */
 373   /**** New in CUPS 1.2 ****/
 374   off_t                 data_remaining; /* Number of bytes left @since CUPS 1.2@ */
 375   http_addr_t           *hostaddr;      /* Current host address and port @since CUPS 1.2@ */
 376   http_addrlist_t       *addrlist;      /* List of valid addresses @since CUPS 1.2@ */
 377   char                  wbuffer[HTTP_MAX_BUFFER];
 378                                         /* Buffer for outgoing data */
 379   int                   wused;          /* Write buffer bytes used @since CUPS 1.2@ */
 380 } http_t;
 381
 382
 383 /*
 384  * Prototypes...
 385  */
 386
 387 extern void             httpBlocking(http_t *http, int b);
 388 extern int              httpCheck(http_t *http);
 389 extern void             httpClearFields(http_t *http);
 390 extern void             httpClose(http_t *http);
 391 extern http_t           *httpConnect(const char *host, int port);
 392 extern http_t           *httpConnectEncrypt(const char *host, int port,
 393                                             http_encryption_t encryption);
 394 extern int              httpDelete(http_t *http, const char *uri);
 395 extern int              httpEncryption(http_t *http, http_encryption_t e);
 396 extern int              httpError(http_t *http);
 397 extern void             httpFlush(http_t *http);
 398 extern int              httpGet(http_t *http, const char *uri);
 399 extern char             *httpGets(char *line, int length, http_t *http);
 400 extern const char       *httpGetDateString(time_t t);
 401 extern time_t           httpGetDateTime(const char *s);
 402 extern const char       *httpGetField(http_t *http, http_field_t field);
 403 extern struct hostent   *httpGetHostByName(const char *name);
 404 extern char             *httpGetSubField(http_t *http, http_field_t field,
 405                                          const char *name, char *value);
 406 extern int              httpHead(http_t *http, const char *uri);
 407 extern void             httpInitialize(void);
 408 extern int              httpOptions(http_t *http, const char *uri);
 409 extern int              httpPost(http_t *http, const char *uri);
 410 extern int              httpPrintf(http_t *http, const char *format, ...)
 411 #  ifdef __GNUC__
 412 __attribute__ ((__format__ (__printf__, 2, 3)))
 413 #  endif /* __GNUC__ */
 414 ;
 415 extern int              httpPut(http_t *http, const char *uri);
 416 extern int              httpRead(http_t *http, char *buffer, int length) _HTTP_DEPRECATED;
 417 extern int              httpReconnect(http_t *http);
 418 extern void             httpSeparate(const char *uri, char *method,
 419                                      char *username, char *host, int *port,
 420                                      char *resource) _HTTP_DEPRECATED;
 421 extern void             httpSetField(http_t *http, http_field_t field,
 422                                      const char *value);
 423 extern const char       *httpStatus(http_status_t status);
 424 extern int              httpTrace(http_t *http, const char *uri);
 425 extern http_status_t    httpUpdate(http_t *http);
 426 extern int              httpWrite(http_t *http, const char *buffer, int length) _HTTP_DEPRECATED;
 427 extern char             *httpEncode64(char *out, const char *in) _HTTP_DEPRECATED;
 428 extern char             *httpDecode64(char *out, const char *in) _HTTP_DEPRECATED;
 429 extern int              httpGetLength(http_t *http) _HTTP_DEPRECATED;
 430 extern char             *httpMD5(const char *, const char *, const char *,
 431                                  char [33]);
 432 extern char             *httpMD5Final(const char *, const char *, const char *,
 433                                       char [33]);
 434 extern char             *httpMD5String(const unsigned char *, char [33]);
 435
 436 /**** New in CUPS 1.1.19 ****/
 437 extern void             httpClearCookie(http_t *http);
 438 extern const char       *httpGetCookie(http_t *http);
 439 extern void             httpSetCookie(http_t *http, const char *cookie);
 440 extern int              httpWait(http_t *http, int msec);
 441
 442 /**** New in CUPS 1.1.21 ****/
 443 extern char             *httpDecode64_2(char *out, int *outlen, const char *in);
 444 extern char             *httpEncode64_2(char *out, int outlen, const char *in,
 445                                         int inlen);
 446 extern void             httpSeparate2(const char *uri,
 447                                       char *method, int methodlen,
 448                                       char *username, int usernamelen,
 449                                       char *host, int hostlen, int *port,
 450                                       char *resource, int resourcelen) _HTTP_DEPRECATED;
 451
 452 /**** New in CUPS 1.2 ****/
 453 extern int              httpAddrAny(const http_addr_t *addr);
 454 extern http_addrlist_t  *httpAddrConnect(http_addrlist_t *addrlist, int *sock);
 455 extern int              httpAddrEqual(const http_addr_t *addr1,
 456                                       const http_addr_t *addr2);
 457 extern void             httpAddrFreeList(http_addrlist_t *addrlist);
 458 extern http_addrlist_t  *httpAddrGetList(const char *hostname, int family,
 459                                          const char *service);
 460 extern int              httpAddrLength(const http_addr_t *addr);
 461 extern int              httpAddrLocalhost(const http_addr_t *addr);
 462 extern char             *httpAddrLookup(const http_addr_t *addr,
 463                                         char *name, int namelen);
 464 extern char             *httpAddrString(const http_addr_t *addr,
 465                                         char *s, int slen);
 466 extern http_uri_status_t httpAssembleURI(http_uri_coding_t encoding,
 467                                          char *uri, int urilen,
 468                                          const char *scheme,
 469                                          const char *username,
 470                                          const char *host, int port,
 471                                          const char *resource);
 472 extern http_uri_status_t httpAssembleURIf(http_uri_coding_t encoding,
 473                                           char *uri, int urilen,
 474                                           const char *scheme,
 475                                           const char *username,
 476                                           const char *host, int port,
 477                                           const char *resourcef, ...);
 478 extern int              httpFlushWrite(http_t *http);
 479 extern int              httpGetBlocking(http_t *http);
 480 extern const char       *httpGetDateString2(time_t t, char *s, int slen);
 481 extern int              httpGetFd(http_t *http);
 482 extern const char       *httpGetHostname(http_t *http, char *s, int slen);
 483 extern off_t            httpGetLength2(http_t *http);
 484 extern http_status_t    httpGetStatus(http_t *http);
 485 extern char             *httpGetSubField2(http_t *http, http_field_t field,
 486                                           const char *name, char *value,
 487                                           int valuelen);
 488 extern ssize_t          httpRead2(http_t *http, char *buffer, size_t length);
 489 extern http_uri_status_t httpSeparateURI(http_uri_coding_t decoding,
 490                                          const char *uri,
 491                                          char *scheme, int schemelen,
 492                                          char *username, int usernamelen,
 493                                          char *host, int hostlen, int *port,
 494                                          char *resource, int resourcelen);
 495 extern void             httpSetExpect(http_t *http, http_status_t expect);
 496 extern void             httpSetLength(http_t *http, size_t length);
 497 extern ssize_t          httpWrite2(http_t *http, const char *buffer,
 498                                    size_t length);
 499
 500
 501 /*
 502  * C++ magic...
 503  */
 504
 505 #  ifdef __cplusplus
 506 }
 507 #  endif /* __cplusplus */
 508 #endif /* !_CUPS_HTTP_H_ */
 509
 510 /*
 511  * End of "$Id: http.h 5889 2006-08-24 21:44:35Z mike $".
 512  */