2 * "$Id: http.h 5023 2006-01-29 14:39:44Z mike $"
4 * Hyper-Text Transport Protocol definitions for the Common UNIX Printing
7 * Copyright 1997-2006 by Easy Software Products, all rights reserved.
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
16 * Attn: CUPS Licensing Information
17 * Easy Software Products
18 * 44141 Airport View Drive, Suite 204
19 * Hollywood, Maryland 20636 USA
21 * Voice: (301) 373-9600
22 * EMail: cups-info@cups.org
23 * WWW: http://www.cups.org
25 * This file is subject to the Apple OS-Developed Software exception.
29 # define _CUPS_HTTP_H_
32 * Include necessary headers...
37 # include <sys/types.h>
39 # include <winsock2.h>
40 # include <ws2tcpip.h>
43 # include <sys/time.h>
44 # include <sys/socket.h>
46 # include <netinet/in.h>
47 # include <arpa/inet.h>
48 # include <netinet/in_systm.h>
49 # include <netinet/ip.h>
50 # if !defined(__APPLE__) || !defined(TCP_NODELAY)
51 # include <netinet/tcp.h>
52 # endif /* !__APPLE__ || !TCP_NODELAY */
55 # endif /* AF_LOCAL */
61 * With GCC 3.0 and higher, we can mark old APIs "deprecated" so you get
62 * a warning at compile-time.
65 # if defined(__GNUC__) && __GNUC__ > 2
66 # define _HTTP_DEPRECATED __attribute__ ((__deprecated__))
68 # define _HTTP_DEPRECATED
69 # endif /* __GNUC__ && __GNUC__ > 2 */
78 # endif /* __cplusplus */
82 * Oh, the wonderful world of IPv6 compatibility. Apparently some
83 * implementations expose the (more logical) 32-bit address parts
84 * to everyone, while others only expose it to kernel code... To
85 * make supporting IPv6 even easier, each vendor chose different
86 * core structure and union names, so the same defines or code
87 * can't be used on all platforms.
89 * The following will likely need tweaking on new platforms that
90 * support IPv6 - the "s6_addr32" define maps to the 32-bit integer
91 * array in the in6_addr union, which is named differently on various
95 #if defined(AF_INET6) && !defined(s6_addr32)
97 # define s6_addr32 _S6_un._S6_u32
98 # elif defined(__FreeBSD__) || defined(__APPLE__)
99 # define s6_addr32 __u6_addr.__u6_addr32
100 # elif defined(WIN32)
102 * Windows only defines byte and 16-bit word members of the union and
103 * requires special casing of all raw address code...
105 # define s6_addr32 error_need_win32_specific_code
107 #endif /* AF_INET6 && !s6_addr32 */
114 # define HTTP_MAX_URI 1024 /* Max length of URI string */
115 # define HTTP_MAX_HOST 256 /* Max length of hostname string */
116 # define HTTP_MAX_BUFFER 2048 /* Max length of data buffer */
117 # define HTTP_MAX_VALUE 256 /* Max header field value length */
121 * Types and structures...
124 typedef enum http_auth_e
/**** HTTP authentication types ****/
126 HTTP_AUTH_NONE
, /* No authentication in use */
127 HTTP_AUTH_BASIC
, /* Basic authentication in use */
128 HTTP_AUTH_MD5
, /* Digest authentication in use */
129 HTTP_AUTH_MD5_SESS
, /* MD5-session authentication in use */
130 HTTP_AUTH_MD5_INT
, /* Digest authentication in use for body */
131 HTTP_AUTH_MD5_SESS_INT
/* MD5-session authentication in use for body */
134 typedef enum http_encoding_e
/**** HTTP transfer encoding values ****/
136 HTTP_ENCODE_LENGTH
, /* Data is sent with Content-Length */
137 HTTP_ENCODE_CHUNKED
/* Data is chunked */
140 typedef enum http_encryption_e
/**** HTTP encryption values ****/
142 HTTP_ENCRYPT_IF_REQUESTED
, /* Encrypt if requested (TLS upgrade) */
143 HTTP_ENCRYPT_NEVER
, /* Never encrypt */
144 HTTP_ENCRYPT_REQUIRED
, /* Encryption is required (TLS upgrade) */
145 HTTP_ENCRYPT_ALWAYS
/* Always encrypt (SSL) */
148 typedef enum http_field_e
/**** HTTP field names ****/
150 HTTP_FIELD_UNKNOWN
= -1, /* Unknown field */
151 HTTP_FIELD_ACCEPT_LANGUAGE
, /* Accept-Language field */
152 HTTP_FIELD_ACCEPT_RANGES
, /* Accept-Ranges field */
153 HTTP_FIELD_AUTHORIZATION
, /* Authorization field */
154 HTTP_FIELD_CONNECTION
, /* Connection field */
155 HTTP_FIELD_CONTENT_ENCODING
, /* Content-Encoding field */
156 HTTP_FIELD_CONTENT_LANGUAGE
, /* Content-Language field */
157 HTTP_FIELD_CONTENT_LENGTH
, /* Content-Length field */
158 HTTP_FIELD_CONTENT_LOCATION
, /* Content-Location field */
159 HTTP_FIELD_CONTENT_MD5
, /* Content-MD5 field */
160 HTTP_FIELD_CONTENT_RANGE
, /* Content-Range field */
161 HTTP_FIELD_CONTENT_TYPE
, /* Content-Type field */
162 HTTP_FIELD_CONTENT_VERSION
, /* Content-Version field */
163 HTTP_FIELD_DATE
, /* Date field */
164 HTTP_FIELD_HOST
, /* Host field */
165 HTTP_FIELD_IF_MODIFIED_SINCE
, /* If-Modified-Since field */
166 HTTP_FIELD_IF_UNMODIFIED_SINCE
, /* If-Unmodified-Since field */
167 HTTP_FIELD_KEEP_ALIVE
, /* Keep-Alive field */
168 HTTP_FIELD_LAST_MODIFIED
, /* Last-Modified field */
169 HTTP_FIELD_LINK
, /* Link field */
170 HTTP_FIELD_LOCATION
, /* Location field */
171 HTTP_FIELD_RANGE
, /* Range field */
172 HTTP_FIELD_REFERER
, /* Referer field */
173 HTTP_FIELD_RETRY_AFTER
, /* Retry-After field */
174 HTTP_FIELD_TRANSFER_ENCODING
, /* Transfer-Encoding field */
175 HTTP_FIELD_UPGRADE
, /* Upgrade field */
176 HTTP_FIELD_USER_AGENT
, /* User-Agent field */
177 HTTP_FIELD_WWW_AUTHENTICATE
, /* WWW-Authenticate field */
178 HTTP_FIELD_MAX
/* Maximum field index */
181 typedef enum http_keepalive_e
/**** HTTP keep-alive values ****/
183 HTTP_KEEPALIVE_OFF
= 0, /* No keep alive support */
184 HTTP_KEEPALIVE_ON
/* Use keep alive */
187 typedef enum http_state_e
/**** HTTP state values; states
188 **** are server-oriented...
191 HTTP_WAITING
, /* Waiting for command */
192 HTTP_OPTIONS
, /* OPTIONS command, waiting for blank line */
193 HTTP_GET
, /* GET command, waiting for blank line */
194 HTTP_GET_SEND
, /* GET command, sending data */
195 HTTP_HEAD
, /* HEAD command, waiting for blank line */
196 HTTP_POST
, /* POST command, waiting for blank line */
197 HTTP_POST_RECV
, /* POST command, receiving data */
198 HTTP_POST_SEND
, /* POST command, sending data */
199 HTTP_PUT
, /* PUT command, waiting for blank line */
200 HTTP_PUT_RECV
, /* PUT command, receiving data */
201 HTTP_DELETE
, /* DELETE command, waiting for blank line */
202 HTTP_TRACE
, /* TRACE command, waiting for blank line */
203 HTTP_CLOSE
, /* CLOSE command, waiting for blank line */
204 HTTP_STATUS
/* Command complete, sending status */
207 typedef enum http_status_e
/**** HTTP status codes ****/
209 HTTP_ERROR
= -1, /* An error response from httpXxxx() */
211 HTTP_CONTINUE
= 100, /* Everything OK, keep going... */
212 HTTP_SWITCHING_PROTOCOLS
, /* HTTP upgrade to TLS/SSL */
214 HTTP_OK
= 200, /* OPTIONS/GET/HEAD/POST/TRACE command was successful */
215 HTTP_CREATED
, /* PUT command was successful */
216 HTTP_ACCEPTED
, /* DELETE command was successful */
217 HTTP_NOT_AUTHORITATIVE
, /* Information isn't authoritative */
218 HTTP_NO_CONTENT
, /* Successful command, no new data */
219 HTTP_RESET_CONTENT
, /* Content was reset/recreated */
220 HTTP_PARTIAL_CONTENT
, /* Only a partial file was recieved/sent */
222 HTTP_MULTIPLE_CHOICES
= 300, /* Multiple files match request */
223 HTTP_MOVED_PERMANENTLY
, /* Document has moved permanently */
224 HTTP_MOVED_TEMPORARILY
, /* Document has moved temporarily */
225 HTTP_SEE_OTHER
, /* See this other link... */
226 HTTP_NOT_MODIFIED
, /* File not modified */
227 HTTP_USE_PROXY
, /* Must use a proxy to access this URI */
229 HTTP_BAD_REQUEST
= 400, /* Bad request */
230 HTTP_UNAUTHORIZED
, /* Unauthorized to access host */
231 HTTP_PAYMENT_REQUIRED
, /* Payment required */
232 HTTP_FORBIDDEN
, /* Forbidden to access this URI */
233 HTTP_NOT_FOUND
, /* URI was not found */
234 HTTP_METHOD_NOT_ALLOWED
, /* Method is not allowed */
235 HTTP_NOT_ACCEPTABLE
, /* Not Acceptable */
236 HTTP_PROXY_AUTHENTICATION
, /* Proxy Authentication is Required */
237 HTTP_REQUEST_TIMEOUT
, /* Request timed out */
238 HTTP_CONFLICT
, /* Request is self-conflicting */
239 HTTP_GONE
, /* Server has gone away */
240 HTTP_LENGTH_REQUIRED
, /* A content length or encoding is required */
241 HTTP_PRECONDITION
, /* Precondition failed */
242 HTTP_REQUEST_TOO_LARGE
, /* Request entity too large */
243 HTTP_URI_TOO_LONG
, /* URI too long */
244 HTTP_UNSUPPORTED_MEDIATYPE
, /* The requested media type is unsupported */
245 HTTP_UPGRADE_REQUIRED
= 426, /* Upgrade to SSL/TLS required */
247 HTTP_SERVER_ERROR
= 500, /* Internal server error */
248 HTTP_NOT_IMPLEMENTED
, /* Feature not implemented */
249 HTTP_BAD_GATEWAY
, /* Bad gateway */
250 HTTP_SERVICE_UNAVAILABLE
, /* Service is unavailable */
251 HTTP_GATEWAY_TIMEOUT
, /* Gateway connection timed out */
252 HTTP_NOT_SUPPORTED
/* HTTP version not supported */
255 typedef enum http_uri_status_e
/**** URI separation status @since CUPS1.2@ ****/
257 HTTP_URI_OVERFLOW
= -8, /* URI buffer for httpAssembleURI is too small */
258 HTTP_URI_BAD_ARGUMENTS
= -7, /* Bad arguments to function (error) */
259 HTTP_URI_BAD_RESOURCE
= -6, /* Bad resource in URI (error) */
260 HTTP_URI_BAD_PORT
= -5, /* Bad port number in URI (error) */
261 HTTP_URI_BAD_HOSTNAME
= -4, /* Bad hostname in URI (error) */
262 HTTP_URI_BAD_USERNAME
= -3, /* Bad username in URI (error) */
263 HTTP_URI_BAD_SCHEME
= -2, /* Bad scheme in URI (error) */
264 HTTP_URI_BAD_URI
= -1, /* Bad/empty URI (error) */
265 HTTP_URI_OK
= 0, /* URI decoded OK */
266 HTTP_URI_MISSING_SCHEME
, /* Missing scheme in URI (warning) */
267 HTTP_URI_UNKNOWN_SCHEME
, /* Unknown scheme in URI (warning) */
268 HTTP_URI_MISSING_RESOURCE
/* Missing resource in URI (warning) */
271 typedef enum http_uri_coding_e
/**** URI en/decode flags ****/
273 HTTP_URI_CODING_NONE
= 0, /* Don't en/decode anything */
274 HTTP_URI_CODING_USERNAME
= 1, /* En/decode the username portion */
275 HTTP_URI_CODING_HOSTNAME
= 2, /* En/decode the hostname portion */
276 HTTP_URI_CODING_RESOURCE
= 4, /* En/decode the resource portion */
277 HTTP_URI_CODING_MOST
= 7, /* En/decode all but the query */
278 HTTP_URI_CODING_QUERY
= 8, /* En/decode the query portion */
279 HTTP_URI_CODING_ALL
= 15 /* En/decode everything */
282 typedef enum http_version_e
/**** HTTP version numbers ****/
284 HTTP_0_9
= 9, /* HTTP/0.9 */
285 HTTP_1_0
= 100, /* HTTP/1.0 */
286 HTTP_1_1
= 101 /* HTTP/1.1 */
289 typedef union http_addr_u
/**** Socket address union, which
290 **** makes using IPv6 and other
291 **** address types easier and
292 **** more portable. @since CUPS 1.2@
295 struct sockaddr addr
; /* Base structure for family value */
296 struct sockaddr_in ipv4
; /* IPv4 address */
298 struct sockaddr_in6 ipv6
; /* IPv6 address */
299 #endif /* AF_INET6 */
301 struct sockaddr_un un
; /* Domain socket file */
302 #endif /* AF_LOCAL */
303 char pad
[256]; /* Padding to ensure binary compatibility */
306 typedef struct http_addrlist_s
/**** Socket address list, which is
307 **** used to enumerate all of the
308 **** addresses that are associated
309 **** with a hostname. @since CUPS 1.2@
312 struct http_addrlist_s
*next
; /* Pointer to next address in list */
313 http_addr_t addr
; /* Address */
316 typedef struct http_s
/**** HTTP connection structure. ****/
318 int fd
; /* File descriptor for this socket */
319 int blocking
; /* To block or not to block */
320 int error
; /* Last error on read */
321 time_t activity
; /* Time since last read/write */
322 http_state_t state
; /* State of client */
323 http_status_t status
; /* Status of last request */
324 http_version_t version
; /* Protocol version */
325 http_keepalive_t keep_alive
; /* Keep-alive supported? */
326 struct sockaddr_in _hostaddr
; /* Address of connected host @deprecated@ */
327 char hostname
[HTTP_MAX_HOST
],
328 /* Name of connected host */
329 fields
[HTTP_FIELD_MAX
][HTTP_MAX_VALUE
];
331 char *data
; /* Pointer to data buffer */
332 http_encoding_t data_encoding
; /* Chunked or not */
333 int _data_remaining
;/* Number of bytes left @deprecated@ */
334 int used
; /* Number of bytes used in buffer */
335 char buffer
[HTTP_MAX_BUFFER
];
336 /* Buffer for incoming data */
337 int auth_type
; /* Authentication in use */
338 _cups_md5_state_t md5_state
; /* MD5 state */
339 char nonce
[HTTP_MAX_VALUE
];
341 int nonce_count
; /* Nonce count */
342 void *tls
; /* TLS state information */
343 http_encryption_t encryption
; /* Encryption requirements */
344 /**** New in CUPS 1.1.19 ****/
345 fd_set
*input_set
; /* select() set for httpWait() @since CUPS 1.1.19@ */
346 http_status_t expect
; /* Expect: header @since CUPS 1.1.19@ */
347 char *cookie
; /* Cookie value(s) @since CUPS 1.1.19@ */
348 /**** New in CUPS 1.1.20 ****/
349 char authstring
[HTTP_MAX_VALUE
],
350 /* Current Authentication value @since CUPS 1.1.20@ */
351 userpass
[HTTP_MAX_VALUE
];
352 /* Username:password string @since CUPS 1.1.20@ */
353 int digest_tries
; /* Number of tries for digest auth @since CUPS 1.1.20@ */
354 /**** New in CUPS 1.2 ****/
355 off_t data_remaining
; /* Number of bytes left @since CUPS 1.2@ */
356 http_addr_t
*hostaddr
; /* Current host address and port @since CUPS 1.2@ */
357 http_addrlist_t
*addrlist
; /* List of valid addresses @since CUPS 1.2@ */
358 char wbuffer
[HTTP_MAX_BUFFER
];
359 /* Buffer for outgoing data */
360 int wused
; /* Write buffer bytes used @since CUPS 1.2@ */
368 # define httpBlocking(http,b) (http)->blocking = (b)
369 extern int httpCheck(http_t
*http
);
370 # define httpClearFields(http) memset((http)->fields, 0, sizeof((http)->fields)),\
371 httpSetField((http), HTTP_FIELD_HOST, (http)->hostname)
372 extern void httpClose(http_t
*http
);
373 extern http_t
*httpConnect(const char *host
, int port
);
374 extern http_t
*httpConnectEncrypt(const char *host
, int port
,
375 http_encryption_t encryption
);
376 extern int httpDelete(http_t
*http
, const char *uri
);
377 extern int httpEncryption(http_t
*http
, http_encryption_t e
);
378 # define httpError(http) ((http)->error)
379 extern void httpFlush(http_t
*http
);
380 extern int httpGet(http_t
*http
, const char *uri
);
381 extern char *httpGets(char *line
, int length
, http_t
*http
);
382 extern const char *httpGetDateString(time_t t
);
383 extern time_t httpGetDateTime(const char *s
);
384 # define httpGetField(http,field) (http)->fields[field]
385 extern struct hostent
*httpGetHostByName(const char *name
);
386 extern char *httpGetSubField(http_t
*http
, http_field_t field
,
387 const char *name
, char *value
);
388 extern int httpHead(http_t
*http
, const char *uri
);
389 extern void httpInitialize(void);
390 extern int httpOptions(http_t
*http
, const char *uri
);
391 extern int httpPost(http_t
*http
, const char *uri
);
392 extern int httpPrintf(http_t
*http
, const char *format
, ...)
394 __attribute__ ((__format__ (__printf__
, 2, 3)))
395 # endif /* __GNUC__ */
397 extern int httpPut(http_t
*http
, const char *uri
);
398 extern int httpRead(http_t
*http
, char *buffer
, int length
) _HTTP_DEPRECATED
;
399 extern int httpReconnect(http_t
*http
);
400 extern void httpSeparate(const char *uri
, char *method
,
401 char *username
, char *host
, int *port
,
402 char *resource
) _HTTP_DEPRECATED
;
403 extern void httpSetField(http_t
*http
, http_field_t field
,
405 extern const char *httpStatus(http_status_t status
);
406 extern int httpTrace(http_t
*http
, const char *uri
);
407 extern http_status_t
httpUpdate(http_t
*http
);
408 extern int httpWrite(http_t
*http
, const char *buffer
, int length
) _HTTP_DEPRECATED
;
409 extern char *httpEncode64(char *out
, const char *in
) _HTTP_DEPRECATED
;
410 extern char *httpDecode64(char *out
, const char *in
) _HTTP_DEPRECATED
;
411 extern int httpGetLength(http_t
*http
) _HTTP_DEPRECATED
;
412 extern char *httpMD5(const char *, const char *, const char *,
414 extern char *httpMD5Final(const char *, const char *, const char *,
416 extern char *httpMD5String(const unsigned char *, char [33]);
418 /**** New in CUPS 1.1.19 ****/
419 extern void httpClearCookie(http_t
*http
);
420 #define httpGetCookie(http) ((http)->cookie)
421 extern void httpSetCookie(http_t
*http
, const char *cookie
);
422 extern int httpWait(http_t
*http
, int msec
);
424 /**** New in CUPS 1.1.21 ****/
425 extern char *httpDecode64_2(char *out
, int *outlen
, const char *in
);
426 extern char *httpEncode64_2(char *out
, int outlen
, const char *in
,
428 extern void httpSeparate2(const char *uri
,
429 char *method
, int methodlen
,
430 char *username
, int usernamelen
,
431 char *host
, int hostlen
, int *port
,
432 char *resource
, int resourcelen
) _HTTP_DEPRECATED
;
434 /**** New in CUPS 1.2 ****/
435 extern int httpAddrAny(const http_addr_t
*addr
);
436 extern http_addrlist_t
*httpAddrConnect(http_addrlist_t
*addrlist
, int *sock
);
437 extern int httpAddrEqual(const http_addr_t
*addr1
,
438 const http_addr_t
*addr2
);
439 extern void httpAddrFreeList(http_addrlist_t
*addrlist
);
440 extern http_addrlist_t
*httpAddrGetList(const char *hostname
, int family
,
441 const char *service
);
442 extern int httpAddrLength(const http_addr_t
*addr
);
443 extern int httpAddrLocalhost(const http_addr_t
*addr
);
444 extern char *httpAddrLookup(const http_addr_t
*addr
,
445 char *name
, int namelen
);
446 extern char *httpAddrString(const http_addr_t
*addr
,
448 extern http_uri_status_t
httpAssembleURI(http_uri_coding_t encoding
,
449 char *uri
, int urilen
,
451 const char *username
,
452 const char *host
, int port
,
453 const char *resource
);
454 extern http_uri_status_t
httpAssembleURIf(http_uri_coding_t encoding
,
455 char *uri
, int urilen
,
457 const char *username
,
458 const char *host
, int port
,
459 const char *resourcef
, ...);
460 extern int httpFlushWrite(http_t
*http
);
461 extern const char *httpGetDateString2(time_t t
, char *s
, int slen
);
462 extern const char *httpGetHostname(char *s
, int slen
);
463 extern off_t
httpGetLength2(http_t
*http
);
464 extern char *httpGetSubField2(http_t
*http
, http_field_t field
,
465 const char *name
, char *value
,
467 extern ssize_t
httpRead2(http_t
*http
, char *buffer
, size_t length
);
468 extern http_uri_status_t
httpSeparateURI(http_uri_coding_t decoding
,
470 char *scheme
, int schemelen
,
471 char *username
, int usernamelen
,
472 char *host
, int hostlen
, int *port
,
473 char *resource
, int resourcelen
);
474 extern void httpSetLength(http_t
*http
, size_t length
);
475 extern ssize_t
httpWrite2(http_t
*http
, const char *buffer
,
485 # endif /* __cplusplus */
486 #endif /* !_CUPS_HTTP_H_ */
489 * End of "$Id: http.h 5023 2006-01-29 14:39:44Z mike $".