cups/http.h

   1 /*
   2  * Hyper-Text Transport Protocol definitions for CUPS.
   3  *
   4  * Copyright 2007-2017 by Apple Inc.
   5  * Copyright 1997-2007 by Easy Software Products, all rights reserved.
   6  *
   7  * These coded instructions, statements, and computer programs are the
   8  * property of Apple Inc. and are protected by Federal copyright
   9  * law.  Distribution and use rights are outlined in the file "LICENSE.txt"
  10  * which should have been included with this file.  If this file is
  11  * missing or damaged, see the license at "http://www.cups.org/".
  12  *
  13  * This file is subject to the Apple OS-Developed Software exception.
  14  */
  15
  16 #ifndef _CUPS_HTTP_H_
  17 #  define _CUPS_HTTP_H_
  18
  19 /*
  20  * Include necessary headers...
  21  */
  22
  23 #  include "versioning.h"
  24 #  include "array.h"
  25 #  include <string.h>
  26 #  include <time.h>
  27 #  include <sys/types.h>
  28 #  ifdef WIN32
  29 #    ifndef __CUPS_SSIZE_T_DEFINED
  30 #      define __CUPS_SSIZE_T_DEFINED
  31 /* Windows does not support the ssize_t type, so map it to off_t... */
  32 typedef off_t ssize_t;                  /* @private@ */
  33 #    endif /* !__CUPS_SSIZE_T_DEFINED */
  34 #    include <winsock2.h>
  35 #    include <ws2tcpip.h>
  36 #  else
  37 #    include <unistd.h>
  38 #    include <sys/time.h>
  39 #    include <sys/socket.h>
  40 #    include <netdb.h>
  41 #    include <netinet/in.h>
  42 #    include <arpa/inet.h>
  43 #    include <netinet/in_systm.h>
  44 #    include <netinet/ip.h>
  45 #    if !defined(__APPLE__) || !defined(TCP_NODELAY)
  46 #      include <netinet/tcp.h>
  47 #    endif /* !__APPLE__ || !TCP_NODELAY */
  48 #    if defined(AF_UNIX) && !defined(AF_LOCAL)
  49 #      define AF_LOCAL AF_UNIX          /* Older UNIX's have old names... */
  50 #    endif /* AF_UNIX && !AF_LOCAL */
  51 #    ifdef AF_LOCAL
  52 #      include <sys/un.h>
  53 #    endif /* AF_LOCAL */
  54 #    if defined(LOCAL_PEERCRED) && !defined(SO_PEERCRED)
  55 #      define SO_PEERCRED LOCAL_PEERCRED
  56 #    endif /* LOCAL_PEERCRED && !SO_PEERCRED */
  57 #  endif /* WIN32 */
  58
  59
  60 /*
  61  * C++ magic...
  62  */
  63
  64 #  ifdef __cplusplus
  65 extern "C" {
  66 #  endif /* __cplusplus */
  67
  68
  69 /*
  70  * Oh, the wonderful world of IPv6 compatibility.  Apparently some
  71  * implementations expose the (more logical) 32-bit address parts
  72  * to everyone, while others only expose it to kernel code...  To
  73  * make supporting IPv6 even easier, each vendor chose different
  74  * core structure and union names, so the same defines or code
  75  * can't be used on all platforms.
  76  *
  77  * The following will likely need tweaking on new platforms that
  78  * support IPv6 - the "s6_addr32" define maps to the 32-bit integer
  79  * array in the in6_addr union, which is named differently on various
  80  * platforms.
  81  */
  82
  83 #if defined(AF_INET6) && !defined(s6_addr32)
  84 #  if defined(__sun)
  85 #    define s6_addr32   _S6_un._S6_u32
  86 #  elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__APPLE__)|| defined(__DragonFly__)
  87 #    define s6_addr32   __u6_addr.__u6_addr32
  88 #  elif defined(WIN32)
  89 /*
  90  * Windows only defines byte and 16-bit word members of the union and
  91  * requires special casing of all raw address code...
  92  */
  93 #    define s6_addr32   error_need_win32_specific_code
  94 #  endif /* __sun */
  95 #endif /* AF_INET6 && !s6_addr32 */
  96
  97
  98 /*
  99  * Limits...
 100  */
 101
 102 #  define HTTP_MAX_URI          1024    /* Max length of URI string */
 103 #  define HTTP_MAX_HOST         256     /* Max length of hostname string */
 104 #  define HTTP_MAX_BUFFER       2048    /* Max length of data buffer */
 105 #  define HTTP_MAX_VALUE        256     /* Max header field value length */
 106
 107
 108 /*
 109  * Types and structures...
 110  */
 111
 112 typedef enum http_auth_e                /**** HTTP authentication types @exclude all@ ****/
 113 {
 114   HTTP_AUTH_NONE,                       /* No authentication in use */
 115   HTTP_AUTH_BASIC,                      /* Basic authentication in use */
 116   HTTP_AUTH_MD5,                        /* Digest authentication in use */
 117   HTTP_AUTH_MD5_SESS,                   /* MD5-session authentication in use */
 118   HTTP_AUTH_MD5_INT,                    /* Digest authentication in use for body */
 119   HTTP_AUTH_MD5_SESS_INT,               /* MD5-session authentication in use for body */
 120   HTTP_AUTH_NEGOTIATE                   /* GSSAPI authentication in use @since CUPS 1.3/macOS 10.5@ */
 121 } http_auth_t;
 122
 123 typedef enum http_encoding_e            /**** HTTP transfer encoding values ****/
 124 {
 125   HTTP_ENCODING_LENGTH,                 /* Data is sent with Content-Length */
 126   HTTP_ENCODING_CHUNKED,                /* Data is chunked */
 127   HTTP_ENCODING_FIELDS                  /* Sending HTTP fields */
 128
 129 #  ifndef _CUPS_NO_DEPRECATED
 130 #    define HTTP_ENCODE_LENGTH  HTTP_ENCODING_LENGTH
 131 #    define HTTP_ENCODE_CHUNKED HTTP_ENCODING_CHUNKED
 132 #    define HTTP_ENCODE_FIELDS  HTTP_ENCODING_FIELDS
 133 #  endif /* !_CUPS_NO_DEPRECATED */
 134 } http_encoding_t;
 135
 136 typedef enum http_encryption_e          /**** HTTP encryption values ****/
 137 {
 138   HTTP_ENCRYPTION_IF_REQUESTED,         /* Encrypt if requested (TLS upgrade) */
 139   HTTP_ENCRYPTION_NEVER,                /* Never encrypt */
 140   HTTP_ENCRYPTION_REQUIRED,             /* Encryption is required (TLS upgrade) */
 141   HTTP_ENCRYPTION_ALWAYS                /* Always encrypt (SSL) */
 142
 143 #  ifndef _CUPS_NO_DEPRECATED
 144 #    define HTTP_ENCRYPT_IF_REQUESTED   HTTP_ENCRYPTION_IF_REQUESTED
 145 #    define HTTP_ENCRYPT_NEVER          HTTP_ENCRYPTION_NEVER
 146 #    define HTTP_ENCRYPT_REQUIRED       HTTP_ENCRYPTION_REQUIRED
 147 #    define HTTP_ENCRYPT_ALWAYS         HTTP_ENCRYPTION_ALWAYS
 148 #  endif /* !_CUPS_NO_DEPRECATED */
 149 } http_encryption_t;
 150
 151 typedef enum http_field_e               /**** HTTP field names ****/
 152 {
 153   HTTP_FIELD_UNKNOWN = -1,              /* Unknown field */
 154   HTTP_FIELD_ACCEPT_LANGUAGE,           /* Accept-Language field */
 155   HTTP_FIELD_ACCEPT_RANGES,             /* Accept-Ranges field */
 156   HTTP_FIELD_AUTHORIZATION,             /* Authorization field */
 157   HTTP_FIELD_CONNECTION,                /* Connection field */
 158   HTTP_FIELD_CONTENT_ENCODING,          /* Content-Encoding field */
 159   HTTP_FIELD_CONTENT_LANGUAGE,          /* Content-Language field */
 160   HTTP_FIELD_CONTENT_LENGTH,            /* Content-Length field */
 161   HTTP_FIELD_CONTENT_LOCATION,          /* Content-Location field */
 162   HTTP_FIELD_CONTENT_MD5,               /* Content-MD5 field */
 163   HTTP_FIELD_CONTENT_RANGE,             /* Content-Range field */
 164   HTTP_FIELD_CONTENT_TYPE,              /* Content-Type field */
 165   HTTP_FIELD_CONTENT_VERSION,           /* Content-Version field */
 166   HTTP_FIELD_DATE,                      /* Date field */
 167   HTTP_FIELD_HOST,                      /* Host field */
 168   HTTP_FIELD_IF_MODIFIED_SINCE,         /* If-Modified-Since field */
 169   HTTP_FIELD_IF_UNMODIFIED_SINCE,       /* If-Unmodified-Since field */
 170   HTTP_FIELD_KEEP_ALIVE,                /* Keep-Alive field */
 171   HTTP_FIELD_LAST_MODIFIED,             /* Last-Modified field */
 172   HTTP_FIELD_LINK,                      /* Link field */
 173   HTTP_FIELD_LOCATION,                  /* Location field */
 174   HTTP_FIELD_RANGE,                     /* Range field */
 175   HTTP_FIELD_REFERER,                   /* Referer field */
 176   HTTP_FIELD_RETRY_AFTER,               /* Retry-After field */
 177   HTTP_FIELD_TRANSFER_ENCODING,         /* Transfer-Encoding field */
 178   HTTP_FIELD_UPGRADE,                   /* Upgrade field */
 179   HTTP_FIELD_USER_AGENT,                /* User-Agent field */
 180   HTTP_FIELD_WWW_AUTHENTICATE,          /* WWW-Authenticate field */
 181   HTTP_FIELD_ACCEPT_ENCODING,           /* Accepting-Encoding field @since CUPS 1.7/macOS 10.9@ */
 182   HTTP_FIELD_ALLOW,                     /* Allow field @since CUPS 1.7/macOS 10.9@ */
 183   HTTP_FIELD_SERVER,                    /* Server field @since CUPS 1.7/macOS 10.9@ */
 184   HTTP_FIELD_MAX                        /* Maximum field index */
 185 } http_field_t;
 186
 187 typedef enum http_keepalive_e           /**** HTTP keep-alive values ****/
 188 {
 189   HTTP_KEEPALIVE_OFF = 0,               /* No keep alive support */
 190   HTTP_KEEPALIVE_ON                     /* Use keep alive */
 191 } http_keepalive_t;
 192
 193 typedef enum http_state_e               /**** HTTP state values; states
 194                                          **** are server-oriented...
 195                                          ****/
 196 {
 197   HTTP_STATE_ERROR = -1,                /* Error on socket */
 198   HTTP_STATE_WAITING,                   /* Waiting for command */
 199   HTTP_STATE_OPTIONS,                   /* OPTIONS command, waiting for blank line */
 200   HTTP_STATE_GET,                       /* GET command, waiting for blank line */
 201   HTTP_STATE_GET_SEND,                  /* GET command, sending data */
 202   HTTP_STATE_HEAD,                      /* HEAD command, waiting for blank line */
 203   HTTP_STATE_POST,                      /* POST command, waiting for blank line */
 204   HTTP_STATE_POST_RECV,                 /* POST command, receiving data */
 205   HTTP_STATE_POST_SEND,                 /* POST command, sending data */
 206   HTTP_STATE_PUT,                       /* PUT command, waiting for blank line */
 207   HTTP_STATE_PUT_RECV,                  /* PUT command, receiving data */
 208   HTTP_STATE_DELETE,                    /* DELETE command, waiting for blank line */
 209   HTTP_STATE_TRACE,                     /* TRACE command, waiting for blank line */
 210   HTTP_STATE_CONNECT,                   /* CONNECT command, waiting for blank line */
 211   HTTP_STATE_STATUS,                    /* Command complete, sending status */
 212   HTTP_STATE_UNKNOWN_METHOD,            /* Unknown request method, waiting for blank line @since CUPS 1.7/macOS 10.9@ */
 213   HTTP_STATE_UNKNOWN_VERSION            /* Unknown request method, waiting for blank line @since CUPS 1.7/macOS 10.9@ */
 214
 215 #  ifndef _CUPS_NO_DEPRECATED
 216 #    define HTTP_WAITING        HTTP_STATE_WAITING
 217 #    define HTTP_OPTIONS        HTTP_STATE_OPTIONS
 218 #    define HTTP_GET            HTTP_STATE_GET
 219 #    define HTTP_GET_SEND       HTTP_STATE_GET_SEND
 220 #    define HTTP_HEAD           HTTP_STATE_HEAD
 221 #    define HTTP_POST           HTTP_STATE_POST
 222 #    define HTTP_POST_RECV      HTTP_STATE_POST_RECV
 223 #    define HTTP_POST_SEND      HTTP_STATE_POST_SEND
 224 #    define HTTP_PUT            HTTP_STATE_PUT
 225 #    define HTTP_PUT_RECV       HTTP_STATE_PUT_RECV
 226 #    define HTTP_DELETE         HTTP_STATE_DELETE
 227 #    define HTTP_TRACE          HTTP_STATE_TRACE
 228 #    define HTTP_CLOSE          HTTP_STATE_CONNECT
 229 #    define HTTP_STATUS         HTTP_STATE_STATUS
 230 #  endif /* !_CUPS_NO_DEPRECATED */
 231 } http_state_t;
 232
 233 typedef enum http_status_e              /**** HTTP status codes ****/
 234 {
 235   HTTP_STATUS_ERROR = -1,               /* An error response from httpXxxx() */
 236   HTTP_STATUS_NONE = 0,                 /* No Expect value @since CUPS 1.7/macOS 10.9@ */
 237
 238   HTTP_STATUS_CONTINUE = 100,           /* Everything OK, keep going... */
 239   HTTP_STATUS_SWITCHING_PROTOCOLS,      /* HTTP upgrade to TLS/SSL */
 240
 241   HTTP_STATUS_OK = 200,                 /* OPTIONS/GET/HEAD/POST/TRACE command was successful */
 242   HTTP_STATUS_CREATED,                  /* PUT command was successful */
 243   HTTP_STATUS_ACCEPTED,                 /* DELETE command was successful */
 244   HTTP_STATUS_NOT_AUTHORITATIVE,        /* Information isn't authoritative */
 245   HTTP_STATUS_NO_CONTENT,               /* Successful command, no new data */
 246   HTTP_STATUS_RESET_CONTENT,            /* Content was reset/recreated */
 247   HTTP_STATUS_PARTIAL_CONTENT,          /* Only a partial file was received/sent */
 248
 249   HTTP_STATUS_MULTIPLE_CHOICES = 300,   /* Multiple files match request */
 250   HTTP_STATUS_MOVED_PERMANENTLY,        /* Document has moved permanently */
 251   HTTP_STATUS_FOUND,                    /* Document was found at a different URI */
 252   HTTP_STATUS_SEE_OTHER,                /* See this other link */
 253   HTTP_STATUS_NOT_MODIFIED,             /* File not modified */
 254   HTTP_STATUS_USE_PROXY,                /* Must use a proxy to access this URI */
 255   HTTP_STATUS_TEMPORARY_REDIRECT = 307, /* Temporary redirection */
 256
 257   HTTP_STATUS_BAD_REQUEST = 400,        /* Bad request */
 258   HTTP_STATUS_UNAUTHORIZED,             /* Unauthorized to access host */
 259   HTTP_STATUS_PAYMENT_REQUIRED,         /* Payment required */
 260   HTTP_STATUS_FORBIDDEN,                /* Forbidden to access this URI */
 261   HTTP_STATUS_NOT_FOUND,                /* URI was not found */
 262   HTTP_STATUS_METHOD_NOT_ALLOWED,       /* Method is not allowed */
 263   HTTP_STATUS_NOT_ACCEPTABLE,           /* Not Acceptable */
 264   HTTP_STATUS_PROXY_AUTHENTICATION,     /* Proxy Authentication is Required */
 265   HTTP_STATUS_REQUEST_TIMEOUT,          /* Request timed out */
 266   HTTP_STATUS_CONFLICT,                 /* Request is self-conflicting */
 267   HTTP_STATUS_GONE,                     /* Server has gone away */
 268   HTTP_STATUS_LENGTH_REQUIRED,          /* A content length or encoding is required */
 269   HTTP_STATUS_PRECONDITION,             /* Precondition failed */
 270   HTTP_STATUS_REQUEST_TOO_LARGE,        /* Request entity too large */
 271   HTTP_STATUS_URI_TOO_LONG,             /* URI too long */
 272   HTTP_STATUS_UNSUPPORTED_MEDIATYPE,    /* The requested media type is unsupported */
 273   HTTP_STATUS_REQUESTED_RANGE,          /* The requested range is not satisfiable */
 274   HTTP_STATUS_EXPECTATION_FAILED,       /* The expectation given in an Expect header field was not met */
 275   HTTP_STATUS_UPGRADE_REQUIRED = 426,   /* Upgrade to SSL/TLS required */
 276
 277   HTTP_STATUS_SERVER_ERROR = 500,       /* Internal server error */
 278   HTTP_STATUS_NOT_IMPLEMENTED,          /* Feature not implemented */
 279   HTTP_STATUS_BAD_GATEWAY,              /* Bad gateway */
 280   HTTP_STATUS_SERVICE_UNAVAILABLE,      /* Service is unavailable */
 281   HTTP_STATUS_GATEWAY_TIMEOUT,          /* Gateway connection timed out */
 282   HTTP_STATUS_NOT_SUPPORTED,            /* HTTP version not supported */
 283
 284   HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED = 1000,
 285                                         /* User canceled authorization @since CUPS 1.4@ */
 286   HTTP_STATUS_CUPS_PKI_ERROR,           /* Error negotiating a secure connection @since CUPS 1.5/macOS 10.7@ */
 287   HTTP_STATUS_CUPS_WEBIF_DISABLED       /* Web interface is disabled @private@ */
 288
 289 #  define HTTP_STATUS_MOVED_TEMPORARILY HTTP_STATUS_FOUND /* Renamed in RFC 7231 */
 290
 291 #  ifndef _CUPS_NO_DEPRECATED
 292 /* Old names for this enumeration */
 293 #    define HTTP_ERROR                  HTTP_STATUS_ERROR
 294
 295 #    define HTTP_CONTINUE               HTTP_STATUS_CONTINUE
 296 #    define HTTP_SWITCHING_PROTOCOLS    HTTP_STATUS_SWITCHING_PROTOCOLS
 297
 298 #    define HTTP_OK                     HTTP_STATUS_OK
 299 #    define HTTP_CREATED                HTTP_STATUS_CREATED
 300 #    define HTTP_ACCEPTED               HTTP_STATUS_ACCEPTED
 301 #    define HTTP_NOT_AUTHORITATIVE      HTTP_STATUS_NOT_AUTHORITATIVE
 302 #    define HTTP_NO_CONTENT             HTTP_STATUS_NO_CONTENT
 303 #    define HTTP_RESET_CONTENT          HTTP_STATUS_RESET_CONTENT
 304 #    define HTTP_PARTIAL_CONTENT        HTTP_STATUS_PARTIAL_CONTENT
 305
 306 #    define HTTP_MULTIPLE_CHOICES       HTTP_STATUS_MULTIPLE_CHOICES
 307 #    define HTTP_MOVED_PERMANENTLY      HTTP_STATUS_MOVED_PERMANENTLY
 308 #    define HTTP_MOVED_TEMPORARILY      HTTP_STATUS_MOVED_TEMPORARILY
 309 #    define HTTP_SEE_OTHER              HTTP_STATUS_SEE_OTHER
 310 #    define HTTP_NOT_MODIFIED           HTTP_STATUS_NOT_MODIFIED
 311 #    define HTTP_USE_PROXY              HTTP_STATUS_USE_PROXY
 312
 313 #    define HTTP_BAD_REQUEST            HTTP_STATUS_BAD_REQUEST
 314 #    define HTTP_UNAUTHORIZED           HTTP_STATUS_UNAUTHORIZED
 315 #    define HTTP_PAYMENT_REQUIRED       HTTP_STATUS_PAYMENT_REQUIRED
 316 #    define HTTP_FORBIDDEN              HTTP_STATUS_FORBIDDEN
 317 #    define HTTP_NOT_FOUND              HTTP_STATUS_NOT_FOUND
 318 #    define HTTP_METHOD_NOT_ALLOWED     HTTP_STATUS_METHOD_NOT_ALLOWED
 319 #    define HTTP_NOT_ACCEPTABLE         HTTP_STATUS_NOT_ACCEPTABLE
 320 #    define HTTP_PROXY_AUTHENTICATION   HTTP_STATUS_PROXY_AUTHENTICATION
 321 #    define HTTP_REQUEST_TIMEOUT        HTTP_STATUS_REQUEST_TIMEOUT
 322 #    define HTTP_CONFLICT               HTTP_STATUS_CONFLICT
 323 #    define HTTP_GONE                   HTTP_STATUS_GONE
 324 #    define HTTP_LENGTH_REQUIRED        HTTP_STATUS_LENGTH_REQUIRED
 325 #    define HTTP_PRECONDITION           HTTP_STATUS_PRECONDITION
 326 #    define HTTP_REQUEST_TOO_LARGE      HTTP_STATUS_REQUEST_TOO_LARGE
 327 #    define HTTP_URI_TOO_LONG           HTTP_STATUS_URI_TOO_LONG
 328 #    define HTTP_UNSUPPORTED_MEDIATYPE  HTTP_STATUS_UNSUPPORTED_MEDIATYPE
 329 #    define HTTP_REQUESTED_RANGE        HTTP_STATUS_REQUESTED_RANGE
 330 #    define HTTP_EXPECTATION_FAILED     HTTP_STATUS_EXPECTATION_FAILED
 331 #    define HTTP_UPGRADE_REQUIRED       HTTP_STATUS_UPGRADE_REQUIRED
 332
 333 #    define HTTP_SERVER_ERROR           HTTP_STATUS_SERVER_ERROR
 334 #    define HTTP_NOT_IMPLEMENTED        HTTP_STATUS_NOT_IMPLEMENTED
 335 #    define HTTP_BAD_GATEWAY            HTTP_STATUS_BAD_GATEWAY
 336 #    define HTTP_SERVICE_UNAVAILABLE    HTTP_STATUS_SERVICE_UNAVAILABLE
 337 #    define HTTP_GATEWAY_TIMEOUT        HTTP_STATUS_GATEWAY_TIMEOUT
 338 #    define HTTP_NOT_SUPPORTED          HTTP_STATUS_NOT_SUPPORTED
 339
 340 #    define HTTP_AUTHORIZATION_CANCELED HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED
 341 #    define HTTP_PKI_ERROR              HTTP_STATUS_CUPS_PKI_ERROR
 342 #    define HTTP_WEBIF_DISABLED         HTTP_STATUS_CUPS_WEBIF_DISABLED
 343 #  endif /* !_CUPS_NO_DEPRECATED */
 344 } http_status_t;
 345
 346 typedef enum http_trust_e               /**** Level of trust for credentials @since CUPS 2.0/OS 10.10@ */
 347 {
 348   HTTP_TRUST_OK = 0,                    /* Credentials are OK/trusted */
 349   HTTP_TRUST_INVALID,                   /* Credentials are invalid */
 350   HTTP_TRUST_CHANGED,                   /* Credentials have changed */
 351   HTTP_TRUST_EXPIRED,                   /* Credentials are expired */
 352   HTTP_TRUST_RENEWED,                   /* Credentials have been renewed */
 353   HTTP_TRUST_UNKNOWN,                   /* Credentials are unknown/new */
 354 } http_trust_t;
 355
 356 typedef enum http_uri_status_e          /**** URI separation status @since CUPS 1.2@ ****/
 357 {
 358   HTTP_URI_STATUS_OVERFLOW = -8,        /* URI buffer for httpAssembleURI is too small */
 359   HTTP_URI_STATUS_BAD_ARGUMENTS = -7,   /* Bad arguments to function (error) */
 360   HTTP_URI_STATUS_BAD_RESOURCE = -6,    /* Bad resource in URI (error) */
 361   HTTP_URI_STATUS_BAD_PORT = -5,        /* Bad port number in URI (error) */
 362   HTTP_URI_STATUS_BAD_HOSTNAME = -4,    /* Bad hostname in URI (error) */
 363   HTTP_URI_STATUS_BAD_USERNAME = -3,    /* Bad username in URI (error) */
 364   HTTP_URI_STATUS_BAD_SCHEME = -2,      /* Bad scheme in URI (error) */
 365   HTTP_URI_STATUS_BAD_URI = -1,         /* Bad/empty URI (error) */
 366   HTTP_URI_STATUS_OK = 0,               /* URI decoded OK */
 367   HTTP_URI_STATUS_MISSING_SCHEME,       /* Missing scheme in URI (warning) */
 368   HTTP_URI_STATUS_UNKNOWN_SCHEME,       /* Unknown scheme in URI (warning) */
 369   HTTP_URI_STATUS_MISSING_RESOURCE      /* Missing resource in URI (warning) */
 370
 371 #  ifndef _CUPS_NO_DEPRECATED
 372 #    define HTTP_URI_OVERFLOW           HTTP_URI_STATUS_OVERFLOW
 373 #    define HTTP_URI_BAD_ARGUMENTS      HTTP_URI_STATUS_BAD_ARGUMENTS
 374 #    define HTTP_URI_BAD_RESOURCE       HTTP_URI_STATUS_BAD_RESOURCE
 375 #    define HTTP_URI_BAD_PORT           HTTP_URI_STATUS_BAD_PORT
 376 #    define HTTP_URI_BAD_HOSTNAME       HTTP_URI_STATUS_BAD_HOSTNAME
 377 #    define HTTP_URI_BAD_USERNAME       HTTP_URI_STATUS_BAD_USERNAME
 378 #    define HTTP_URI_BAD_SCHEME         HTTP_URI_STATUS_BAD_SCHEME
 379 #    define HTTP_URI_BAD_URI            HTTP_URI_STATUS_BAD_URI
 380 #    define HTTP_URI_OK                 HTTP_URI_STATUS_OK
 381 #    define HTTP_URI_MISSING_SCHEME     HTTP_URI_STATUS_MISSING_SCHEME
 382 #    define HTTP_URI_UNKNOWN_SCHEME     HTTP_URI_STATUS_UNKNOWN_SCHEME
 383 #    define HTTP_URI_MISSING_RESOURCE   HTTP_URI_STATUS_MISSING_RESOURCE
 384 #  endif /* !_CUPS_NO_DEPRECATED */
 385 } http_uri_status_t;
 386
 387 typedef enum http_uri_coding_e          /**** URI en/decode flags ****/
 388 {
 389   HTTP_URI_CODING_NONE = 0,             /* Don't en/decode anything */
 390   HTTP_URI_CODING_USERNAME = 1,         /* En/decode the username portion */
 391   HTTP_URI_CODING_HOSTNAME = 2,         /* En/decode the hostname portion */
 392   HTTP_URI_CODING_RESOURCE = 4,         /* En/decode the resource portion */
 393   HTTP_URI_CODING_MOST = 7,             /* En/decode all but the query */
 394   HTTP_URI_CODING_QUERY = 8,            /* En/decode the query portion */
 395   HTTP_URI_CODING_ALL = 15,             /* En/decode everything */
 396   HTTP_URI_CODING_RFC6874 = 16          /* Use RFC 6874 address format */
 397 } http_uri_coding_t;
 398
 399 typedef enum http_version_e             /**** HTTP version numbers @exclude all@ ****/
 400 {
 401   HTTP_VERSION_0_9 = 9,                 /* HTTP/0.9 */
 402   HTTP_VERSION_1_0 = 100,               /* HTTP/1.0 */
 403   HTTP_VERSION_1_1 = 101                /* HTTP/1.1 */
 404
 405 #  ifndef _CUPS_NO_DEPRECATED
 406 #    define HTTP_0_9    HTTP_VERSION_0_9
 407 #    define HTTP_1_0    HTTP_VERSION_1_0
 408 #    define HTTP_1_1    HTTP_VERSION_1_1
 409 #  endif /* !_CUPS_NO_DEPRECATED */
 410 } http_version_t;
 411
 412 typedef union _http_addr_u              /**** Socket address union, which
 413                                          **** makes using IPv6 and other
 414                                          **** address types easier and
 415                                          **** more portable. @since CUPS 1.2/macOS 10.5@
 416                                          ****/
 417 {
 418   struct sockaddr       addr;           /* Base structure for family value */
 419   struct sockaddr_in    ipv4;           /* IPv4 address */
 420 #ifdef AF_INET6
 421   struct sockaddr_in6   ipv6;           /* IPv6 address */
 422 #endif /* AF_INET6 */
 423 #ifdef AF_LOCAL
 424   struct sockaddr_un    un;             /* Domain socket file */
 425 #endif /* AF_LOCAL */
 426   char                  pad[256];       /* Padding to ensure binary compatibility */
 427 } http_addr_t;
 428
 429 typedef struct http_addrlist_s          /**** Socket address list, which is
 430                                          **** used to enumerate all of the
 431                                          **** addresses that are associated
 432                                          **** with a hostname. @since CUPS 1.2/macOS 10.5@
 433                                          **** @exclude all@
 434                                          ****/
 435 {
 436   struct http_addrlist_s *next;         /* Pointer to next address in list */
 437   http_addr_t           addr;           /* Address */
 438 } http_addrlist_t;
 439
 440 typedef struct _http_s http_t;          /**** HTTP connection type ****/
 441
 442 typedef struct http_credential_s        /**** HTTP credential data @since CUPS 1.5/macOS 10.7@ @exclude all@ ****/
 443 {
 444   void          *data;                  /* Pointer to credential data */
 445   size_t        datalen;                /* Credential length */
 446 } http_credential_t;
 447
 448 typedef int (*http_timeout_cb_t)(http_t *http, void *user_data);
 449                                         /**** HTTP timeout callback @since CUPS 1.5/macOS 10.7@ ****/
 450
 451
 452
 453 /*
 454  * Prototypes...
 455  */
 456
 457 extern void             httpBlocking(http_t *http, int b);
 458 extern int              httpCheck(http_t *http);
 459 extern void             httpClearFields(http_t *http);
 460 extern void             httpClose(http_t *http);
 461 extern http_t           *httpConnect(const char *host, int port)
 462                                      _CUPS_DEPRECATED_1_7_MSG("Use httpConnect2 instead.");
 463 extern http_t           *httpConnectEncrypt(const char *host, int port,
 464                                             http_encryption_t encryption)
 465                                             _CUPS_DEPRECATED_1_7_MSG("Use httpConnect2 instead.");
 466 extern int              httpDelete(http_t *http, const char *uri);
 467 extern int              httpEncryption(http_t *http, http_encryption_t e);
 468 extern int              httpError(http_t *http);
 469 extern void             httpFlush(http_t *http);
 470 extern int              httpGet(http_t *http, const char *uri);
 471 extern char             *httpGets(char *line, int length, http_t *http);
 472 extern const char       *httpGetDateString(time_t t);
 473 extern time_t           httpGetDateTime(const char *s);
 474 extern const char       *httpGetField(http_t *http, http_field_t field);
 475 extern struct hostent   *httpGetHostByName(const char *name);
 476 extern char             *httpGetSubField(http_t *http, http_field_t field,
 477                                          const char *name, char *value);
 478 extern int              httpHead(http_t *http, const char *uri);
 479 extern void             httpInitialize(void);
 480 extern int              httpOptions(http_t *http, const char *uri);
 481 extern int              httpPost(http_t *http, const char *uri);
 482 extern int              httpPrintf(http_t *http, const char *format, ...)
 483                         __attribute__ ((__format__ (__printf__, 2, 3)));
 484 extern int              httpPut(http_t *http, const char *uri);
 485 extern int              httpRead(http_t *http, char *buffer, int length) _CUPS_DEPRECATED_MSG("Use httpRead2 instead.");
 486 extern int              httpReconnect(http_t *http) _CUPS_DEPRECATED_1_6_MSG("Use httpReconnect2 instead.");
 487 extern void             httpSeparate(const char *uri, char *method,
 488                                      char *username, char *host, int *port,
 489                                      char *resource) _CUPS_DEPRECATED_MSG("Use httpSeparateURI instead.");
 490 extern void             httpSetField(http_t *http, http_field_t field,
 491                                      const char *value);
 492 extern const char       *httpStatus(http_status_t status);
 493 extern int              httpTrace(http_t *http, const char *uri);
 494 extern http_status_t    httpUpdate(http_t *http);
 495 extern int              httpWrite(http_t *http, const char *buffer, int length) _CUPS_DEPRECATED_MSG("Use httpWrite2 instead.");
 496 extern char             *httpEncode64(char *out, const char *in) _CUPS_DEPRECATED_MSG("Use httpEncode64_2 instead.");
 497 extern char             *httpDecode64(char *out, const char *in) _CUPS_DEPRECATED_MSG("Use httpDecode64_2 instead.");
 498 extern int              httpGetLength(http_t *http) _CUPS_DEPRECATED_MSG("Use httpGetLength2 instead.");
 499 extern char             *httpMD5(const char *, const char *, const char *,
 500                                  char [33]);
 501 extern char             *httpMD5Final(const char *, const char *, const char *,
 502                                       char [33]);
 503 extern char             *httpMD5String(const unsigned char *, char [33]);
 504
 505 /**** New in CUPS 1.1.19 ****/
 506 extern void             httpClearCookie(http_t *http) _CUPS_API_1_1_19;
 507 extern const char       *httpGetCookie(http_t *http) _CUPS_API_1_1_19;
 508 extern void             httpSetCookie(http_t *http, const char *cookie) _CUPS_API_1_1_19;
 509 extern int              httpWait(http_t *http, int msec) _CUPS_API_1_1_19;
 510
 511 /**** New in CUPS 1.1.21 ****/
 512 extern char             *httpDecode64_2(char *out, int *outlen, const char *in) _CUPS_API_1_1_21;
 513 extern char             *httpEncode64_2(char *out, int outlen, const char *in,
 514                                         int inlen) _CUPS_API_1_1_21;
 515 extern void             httpSeparate2(const char *uri,
 516                                       char *method, int methodlen,
 517                                       char *username, int usernamelen,
 518                                       char *host, int hostlen, int *port,
 519                                       char *resource, int resourcelen) _CUPS_DEPRECATED_MSG("Use httpSeparateURI instead.");
 520
 521 /**** New in CUPS 1.2/macOS 10.5 ****/
 522 extern int              httpAddrAny(const http_addr_t *addr) _CUPS_API_1_2;
 523 extern http_addrlist_t  *httpAddrConnect(http_addrlist_t *addrlist, int *sock) _CUPS_API_1_2;
 524 extern int              httpAddrEqual(const http_addr_t *addr1,
 525                                       const http_addr_t *addr2) _CUPS_API_1_2;
 526 extern void             httpAddrFreeList(http_addrlist_t *addrlist) _CUPS_API_1_2;
 527 extern http_addrlist_t  *httpAddrGetList(const char *hostname, int family,
 528                                          const char *service) _CUPS_API_1_2;
 529 extern int              httpAddrLength(const http_addr_t *addr) _CUPS_API_1_2;
 530 extern int              httpAddrLocalhost(const http_addr_t *addr) _CUPS_API_1_2;
 531 extern char             *httpAddrLookup(const http_addr_t *addr,
 532                                         char *name, int namelen) _CUPS_API_1_2;
 533 extern char             *httpAddrString(const http_addr_t *addr,
 534                                         char *s, int slen) _CUPS_API_1_2;
 535 extern http_uri_status_t httpAssembleURI(http_uri_coding_t encoding,
 536                                          char *uri, int urilen,
 537                                          const char *scheme,
 538                                          const char *username,
 539                                          const char *host, int port,
 540                                          const char *resource) _CUPS_API_1_2;
 541 extern http_uri_status_t httpAssembleURIf(http_uri_coding_t encoding,
 542                                           char *uri, int urilen,
 543                                           const char *scheme,
 544                                           const char *username,
 545                                           const char *host, int port,
 546                                           const char *resourcef, ...) _CUPS_API_1_2;
 547 extern int              httpFlushWrite(http_t *http) _CUPS_API_1_2;
 548 extern int              httpGetBlocking(http_t *http) _CUPS_API_1_2;
 549 extern const char       *httpGetDateString2(time_t t, char *s, int slen) _CUPS_API_1_2;
 550 extern int              httpGetFd(http_t *http) _CUPS_API_1_2;
 551 extern const char       *httpGetHostname(http_t *http, char *s, int slen) _CUPS_API_1_2;
 552 extern off_t            httpGetLength2(http_t *http) _CUPS_API_1_2;
 553 extern http_status_t    httpGetStatus(http_t *http) _CUPS_API_1_2;
 554 extern char             *httpGetSubField2(http_t *http, http_field_t field,
 555                                           const char *name, char *value,
 556                                           int valuelen) _CUPS_API_1_2;
 557 extern ssize_t          httpRead2(http_t *http, char *buffer, size_t length) _CUPS_API_1_2;
 558 extern http_uri_status_t httpSeparateURI(http_uri_coding_t decoding,
 559                                          const char *uri,
 560                                          char *scheme, int schemelen,
 561                                          char *username, int usernamelen,
 562                                          char *host, int hostlen, int *port,
 563                                          char *resource, int resourcelen) _CUPS_API_1_2;
 564 extern void             httpSetExpect(http_t *http, http_status_t expect) _CUPS_API_1_2;
 565 extern void             httpSetLength(http_t *http, size_t length) _CUPS_API_1_2;
 566 extern ssize_t          httpWrite2(http_t *http, const char *buffer,
 567                                    size_t length) _CUPS_API_1_2;
 568
 569 /**** New in CUPS 1.3/macOS 10.5 ****/
 570 extern char             *httpGetAuthString(http_t *http) _CUPS_API_1_3;
 571 extern void             httpSetAuthString(http_t *http, const char *scheme,
 572                                           const char *data) _CUPS_API_1_3;
 573
 574 /**** New in CUPS 1.5/macOS 10.7 ****/
 575 extern int              httpAddCredential(cups_array_t *credentials,
 576                                           const void *data, size_t datalen)
 577                                           _CUPS_API_1_5;
 578 extern int              httpCopyCredentials(http_t *http,
 579                                             cups_array_t **credentials)
 580                                             _CUPS_API_1_5;
 581 extern void             httpFreeCredentials(cups_array_t *certs) _CUPS_API_1_5;
 582 extern int              httpSetCredentials(http_t *http, cups_array_t *certs)
 583                                            _CUPS_API_1_5;
 584 extern void             httpSetTimeout(http_t *http, double timeout,
 585                                        http_timeout_cb_t cb, void *user_data)
 586                                        _CUPS_API_1_5;
 587
 588 /**** New in CUPS 1.6/macOS 10.8 ****/
 589 extern http_addrlist_t  *httpAddrConnect2(http_addrlist_t *addrlist, int *sock,
 590                                           int msec, int *cancel)
 591                                           _CUPS_API_1_6;
 592 extern http_state_t     httpGetState(http_t *http) _CUPS_API_1_6;
 593 extern http_version_t   httpGetVersion(http_t *http) _CUPS_API_1_6;
 594 extern int              httpReconnect2(http_t *http, int msec, int *cancel)
 595                                        _CUPS_API_1_6;
 596
 597
 598 /**** New in CUPS 1.7/macOS 10.9 ****/
 599 extern http_t           *httpAcceptConnection(int fd, int blocking)
 600                                               _CUPS_API_1_7;
 601 extern http_addrlist_t  *httpAddrCopyList(http_addrlist_t *src) _CUPS_API_1_7;
 602 extern int              httpAddrListen(http_addr_t *addr, int port)
 603                                        _CUPS_API_1_7;
 604 extern int              httpAddrPort(http_addr_t *addr) _CUPS_API_1_7;
 605 extern char             *httpAssembleUUID(const char *server, int port,
 606                                           const char *name, int number,
 607                                           char *buffer, size_t bufsize)
 608                                           _CUPS_API_1_7;
 609 extern http_t           *httpConnect2(const char *host, int port,
 610                                       http_addrlist_t *addrlist,
 611                                       int family, http_encryption_t encryption,
 612                                       int blocking, int msec, int *cancel)
 613                                       _CUPS_API_1_7;
 614 extern const char       *httpGetContentEncoding(http_t *http) _CUPS_API_1_7;
 615 extern http_status_t    httpGetExpect(http_t *http) _CUPS_API_1_7;
 616 extern ssize_t          httpPeek(http_t *http, char *buffer, size_t length)
 617                                  _CUPS_API_1_7;
 618 extern http_state_t     httpReadRequest(http_t *http, char *resource,
 619                                         size_t resourcelen) _CUPS_API_1_7;
 620 extern void             httpSetDefaultField(http_t *http, http_field_t field,
 621                                             const char *value) _CUPS_API_1_7;
 622 extern http_state_t     httpWriteResponse(http_t *http,
 623                                           http_status_t status) _CUPS_API_1_7;
 624
 625 /* New in CUPS 2.0/macOS 10.10 */
 626 extern int              httpAddrClose(http_addr_t *addr, int fd) _CUPS_API_2_0;
 627 extern int              httpAddrFamily(http_addr_t *addr) _CUPS_API_2_0;
 628 extern int              httpCompareCredentials(cups_array_t *cred1, cups_array_t *cred2) _CUPS_API_2_0;
 629 extern int              httpCredentialsAreValidForName(cups_array_t *credentials, const char *common_name);
 630 extern time_t           httpCredentialsGetExpiration(cups_array_t *credentials) _CUPS_API_2_0;
 631 extern http_trust_t     httpCredentialsGetTrust(cups_array_t *credentials, const char *common_name) _CUPS_API_2_0;
 632 extern size_t           httpCredentialsString(cups_array_t *credentials, char *buffer, size_t bufsize) _CUPS_API_2_0;
 633 extern http_field_t     httpFieldValue(const char *name) _CUPS_API_2_0;
 634 extern time_t           httpGetActivity(http_t *http) _CUPS_API_2_0;
 635 extern http_addr_t      *httpGetAddress(http_t *http) _CUPS_API_2_0;
 636 extern http_encryption_t httpGetEncryption(http_t *http) _CUPS_API_2_0;
 637 extern http_keepalive_t httpGetKeepAlive(http_t *http) _CUPS_API_2_0;
 638 extern size_t           httpGetPending(http_t *http) _CUPS_API_2_0;
 639 extern size_t           httpGetReady(http_t *http) _CUPS_API_2_0;
 640 extern size_t           httpGetRemaining(http_t *http) _CUPS_API_2_0;
 641 extern int              httpIsChunked(http_t *http) _CUPS_API_2_0;
 642 extern int              httpIsEncrypted(http_t *http) _CUPS_API_2_0;
 643 extern int              httpLoadCredentials(const char *path, cups_array_t **credentials, const char *common_name) _CUPS_API_2_0;
 644 extern const char       *httpResolveHostname(http_t *http, char *buffer, size_t bufsize) _CUPS_API_2_0;
 645 extern int              httpSaveCredentials(const char *path, cups_array_t *credentials, const char *common_name) _CUPS_API_2_0;
 646 extern void             httpSetKeepAlive(http_t *http, http_keepalive_t keep_alive) _CUPS_API_2_0;
 647 extern void             httpShutdown(http_t *http) _CUPS_API_2_0;
 648 extern const char       *httpStateString(http_state_t state) _CUPS_API_2_0;
 649 extern const char       *httpURIStatusString(http_uri_status_t status) _CUPS_API_2_0;
 650
 651 /*
 652  * C++ magic...
 653  */
 654
 655 #  ifdef __cplusplus
 656 }
 657 #  endif /* __cplusplus */
 658 #endif /* !_CUPS_HTTP_H_ */