3 /*****************************************************************************
5 * Project ___| | | | _ \| |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
10 * Copyright (C) 2001, Daniel Stenberg, <daniel@haxx.se>, et al.
12 * In order to be useful for every potential user, curl and libcurl are
13 * dual-licensed under the MPL and the MIT/X-derivate licenses.
15 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
16 * copies of the Software, and permit persons to whom the Software is
17 * furnished to do so, under the terms of the MPL or the MIT/X-derivate
18 * licenses. You may pick one of these licenses.
20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21 * KIND, either express or implied.
24 *****************************************************************************/
26 /* This file is for lib internal stuff */
32 #define PORT_TELNET 23
33 #define PORT_GOPHER 70
35 #define PORT_HTTPS 443
36 #define PORT_DICT 2628
39 #define DICT_MATCH "/MATCH:"
40 #define DICT_MATCH2 "/M:"
41 #define DICT_MATCH3 "/FIND:"
42 #define DICT_DEFINE "/DEFINE:"
43 #define DICT_DEFINE2 "/D:"
44 #define DICT_DEFINE3 "/LOOKUP:"
46 #define CURL_DEFAULT_USER "anonymous"
47 #define CURL_DEFAULT_PASSWORD "curl_by_daniel@haxx.se"
53 /* SSLeay stuff usually in /usr/local/ssl/include */
55 #include "openssl/rsa.h"
56 #include "openssl/crypto.h"
57 #include "openssl/x509.h"
58 #include "openssl/pem.h"
59 #include "openssl/ssl.h"
60 #include "openssl/err.h"
71 #ifdef HAVE_NETINET_IN_H
72 #include <netinet/in.h>
77 #include <curl/curl.h>
79 #include "http_chunks.h" /* for the structs and enum stuff */
81 /* Download buffer size, keep it fairly big for speed reasons */
82 #define BUFSIZE (1024*50)
84 /* Defaul upload buffer size, keep it smallish to get faster progress meter
85 updates. This is just default, it is dynamic and adjusts to the upload
87 #define UPLOAD_BUFSIZE (1024*2)
89 /* Initial size of the buffer to store headers in, it'll be enlarged in case
91 #define HEADERSIZE 256
93 /* Just a convenience macro to get the larger value out of two given */
95 #define MAX(x,y) ((x)>(y)?(x):(y))
99 /* Types needed for krb4-ftp connections */
106 enum protection_level {
114 /* struct for data related to SSL and SSL connections */
115 struct ssl_connect_data {
116 bool use; /* use ssl encrypted communications TRUE/FALSE */
118 /* these ones requires specific SSL-types */
122 #endif /* USE_SSLEAY */
125 /* information about one single SSL session */
126 struct curl_ssl_session {
127 char *name; /* host name for which this ID was used */
128 void *sessionid; /* as returned from the SSL layer */
129 long age; /* just a number, the higher the more recent */
130 unsigned short remote_port; /* remote port to connect to */
133 struct ssl_config_data {
134 long version; /* what version the client wants to use */
135 long certverifyresult; /* result from the certificate verification */
136 long verifypeer; /* set TRUE if this is desired */
137 long verifyhost; /* 0: no verif, 1: check that CN exists, 2: CN must match hostname */
138 char *CApath; /* DOES NOT WORK ON WINDOWS */
139 char *CAfile; /* cerficate to verify peer against */
140 char *random_file; /* path to file containing "random" data */
141 char *egdsocket; /* path to file containing the EGD daemon socket */
142 char *cipher_list; /* list of ciphers to use */
144 long numsessions; /* SSL session id cache size */
147 /****************************************************************************
149 ***************************************************************************/
151 struct FormData *sendit;
153 const char *p_pragma; /* Pragma: string */
154 const char *p_accept; /* Accept: string */
158 /* For FORM posting */
160 curl_read_callback storefread;
163 struct Curl_chunker chunk;
166 /****************************************************************************
168 ***************************************************************************/
171 char *user; /* user name string */
172 char *passwd; /* password string */
173 char *urlpath; /* the originally given path part of the URL */
174 char *dir; /* decoded directory */
175 char *file; /* decoded file */
177 char *entrypath; /* the PWD reply when we logged on */
180 /****************************************************************************
182 ***************************************************************************/
184 int fd; /* open file descriptor to read from! */
188 * Boolean values that concerns this connection.
191 bool close; /* if set, we close the connection after this request */
192 bool reuse; /* if set, this is a re-used connection */
193 bool chunk; /* if set, this is a chunked transfer-encoding */
194 bool httpproxy; /* if set, this transfer is done through a http proxy */
195 bool user_passwd; /* do we use user+password for this connection? */
196 bool proxy_user_passwd; /* user+password for the proxy? */
199 bool rangestringalloc; /* the range string is malloc()'ed */
201 bool resume_done; /* nothing was transfered, resumed transfer already
206 * The connectdata struct contains all fields and variables that should be
207 * unique for an entire connection.
210 /**** Fields set when inited and not modified again */
211 struct SessionHandle *data; /* link to the root CURL struct */
212 int connectindex; /* what index in the connects index this particular
215 long protocol; /* PROT_* flags concerning the protocol set */
216 #define PROT_MISSING (1<<0)
217 #define PROT_GOPHER (1<<1)
218 #define PROT_HTTP (1<<2)
219 #define PROT_HTTPS (1<<3)
220 #define PROT_FTP (1<<4)
221 #define PROT_TELNET (1<<5)
222 #define PROT_DICT (1<<6)
223 #define PROT_LDAP (1<<7)
224 #define PROT_FILE (1<<8)
225 #define PROT_FTPS (1<<9)
227 Curl_addrinfo *hostaddr; /* IP-protocol independent host info pointer list */
228 char *hostent_buf; /* pointer to allocated memory for name info */
231 struct addrinfo *serv_addr; /* the particular host we use */
233 struct sockaddr_in serv_addr;
235 char protostr[64]; /* store the protocol string in this buffer */
236 char gname[257]; /* store the hostname in this buffer */
237 char *name; /* host name pointer to fool around with */
238 char *path; /* allocated buffer to store the URL's path part in */
239 char *hostname; /* hostname to connect, as parsed from url */
240 long port; /* which port to use locally */
241 unsigned short remote_port; /* what remote port to connect to,
242 not the proxy port! */
246 char *range; /* range, if used. See README for detailed specification on
248 int resume_from; /* continue [ftp] transfer from here */
250 char *proxyhost; /* name of the http proxy host */
252 struct timeval now; /* "current" time */
253 struct timeval created; /* creation time */
254 int firstsocket; /* the main socket to use */
255 int secondarysocket; /* for i.e ftp transfers */
257 long upload_bufsize; /* adjust as you see fit, never bigger than BUFSIZE
258 never smaller than UPLOAD_BUFSIZE */
260 long maxdownload; /* in bytes, the maximum amount of data to fetch, 0
263 struct ssl_connect_data ssl; /* this is for ssl-stuff */
265 struct ConnectBits bits; /* various state-flags for this connection */
267 /* These two functions MUST be set by the curl_connect() function to be
268 be protocol dependent */
269 CURLcode (*curl_do)(struct connectdata *connect);
270 CURLcode (*curl_done)(struct connectdata *connect);
272 /* This function *MAY* be set to a protocol-dependent function that is run
273 * after the connect() and everything is done, as a step in the connection.
275 CURLcode (*curl_connect)(struct connectdata *connect);
277 /* This function *MAY* be set to a protocol-dependent function that is run
278 * by the curl_disconnect(), as a step in the disconnection.
280 CURLcode (*curl_disconnect)(struct connectdata *connect);
282 /* This function *MAY* be set to a protocol-dependent function that is run
283 * in the curl_close() function if protocol-specific cleanups are required.
285 CURLcode (*curl_close)(struct connectdata *connect);
287 /**** curl_get() phase fields */
290 int sockfd; /* socket to read from or -1 */
291 int size; /* -1 if unknown at this point */
292 bool getheader; /* TRUE if header parsing is wanted */
293 long *bytecountp; /* return number of bytes read or NULL */
296 int writesockfd; /* socket to write to, it may very well be
297 the same we read from. -1 disables */
298 long *writebytecountp; /* return number of bytes written or NULL */
300 /** Dynamicly allocated strings, may need to be freed before this **/
301 /** struct is killed. **/
302 struct dynamically_allocated_data {
303 char *proxyuserpwd; /* free later if not NULL! */
304 char *uagent; /* free later if not NULL! */
305 char *userpwd; /* free later if not NULL! */
306 char *rangeline; /* free later if not NULL! */
307 char *ref; /* free later if not NULL! */
308 char *cookie; /* free later if not NULL! */
309 char *host; /* free later if not NULL */
312 char *newurl; /* This can only be set if a Location: was in the
316 enum protection_level command_prot;
317 enum protection_level data_prot;
318 enum protection_level request_data_prot;
322 struct krb4buffer in_buffer, out_buffer;
326 struct Curl_sec_client_mech *mech;
327 struct sockaddr_in local_addr;
331 /*************** Request - specific items ************/
332 /* previously this was in the urldata struct */
335 struct HTTP *gopher; /* alias, just for the sake of being more readable */
336 struct HTTP *https; /* alias, just for the sake of being more readable */
339 void *telnet; /* private for telnet.c-eyes only */
340 #if 0 /* no need for special ones for these: */
350 * Struct to keep statistical and informational data.
355 long filetime; /* If requested, this is might get set. Set to -1 if
356 the time was unretrievable */
357 long header_size; /* size of read header(s) in bytes */
358 long request_size; /* the amount of bytes sent in the request(s) */
363 long lastshow; /* time() of the last displayed progress meter or NULL to
364 force redraw at next call */
370 double current_speed; /* uses the currently fastest transfer */
372 bool callback; /* set when progress callback is used */
373 int width; /* screen width at download start */
374 int flags; /* see progress.h */
383 double t_pretransfer;
385 struct timeval start;
386 struct timeval t_startsingle;
387 #define CURR_TIME (5+1) /* 6 entries for 5 seconds */
389 double speeder[ CURR_TIME ];
390 struct timeval speeder_time[ CURR_TIME ];
395 HTTPREQ_NONE, /* first in list */
398 HTTPREQ_POST_FORM, /* we make a difference internally */
401 HTTPREQ_LAST /* last in list */
405 * Values that are generated, temporary or calculated internally for a
406 * "session handle" must be defined within the 'struct urlstate'. This struct
407 * will be used within the SessionHandle struct. When the 'SessionHandle'
408 * struct is cloned, this data MUST NOT be copied.
410 * Remember that any "state" information goes globally for the curl handle.
411 * Session-data MUST be put in the connectdata struct and here. */
412 #define MAX_CURL_USER_LENGTH 256
413 #define MAX_CURL_PASSWORD_LENGTH 256
416 /* buffers to store authentication data in, as parsed from input options */
417 char user[MAX_CURL_USER_LENGTH];
418 char passwd[MAX_CURL_PASSWORD_LENGTH];
419 char proxyuser[MAX_CURL_USER_LENGTH];
420 char proxypasswd[MAX_CURL_PASSWORD_LENGTH];
422 struct timeval keeps_speed; /* for the progress meter really */
424 /* 'connects' will be an allocated array with pointers. If the pointer is
425 set, it holds an allocated connection. */
426 struct connectdata **connects;
427 long numconnects; /* size of the 'connects' array */
429 char *headerbuff; /* allocated buffer to store headers in */
430 int headersize; /* size of the allocation */
432 char buffer[BUFSIZE+1]; /* buffer with size BUFSIZE */
434 double current_speed; /* the ProgressShow() funcion sets this */
436 bool this_is_a_follow; /* this is a followed Location: request */
438 char *auth_host; /* if set, this should be the host name that we will
439 sent authorization to, no else. Used to make Location:
440 following not keep sending user+password... This is
444 struct curl_ssl_session *session; /* array of 'numsessions' size */
445 long sessionage; /* number of the most recent session */
447 char scratch[BUFSIZE*2]; /* huge buffer when doing upload CRLF replacing */
452 * This 'DynamicStatic' struct defines dynamic states that actually change
453 * values in the 'UserDefined' area, which MUST be taken into consideration
454 * if the UserDefined struct is cloned or similar. You can probably just
455 * copy these, but each one indicate a special action on other data.
458 struct DynamicStatic {
459 char *url; /* work URL, copied from UserDefined */
460 bool url_alloc; /* URL string is malloc()'ed */
461 char *proxy; /* work proxy, copied from UserDefined */
462 bool proxy_alloc; /* http proxy string is malloc()'ed */
463 char *referer; /* referer string */
464 bool referer_alloc; /* referer sting is malloc()ed */
468 * This 'UserDefined' struct must only contain data that is set once to go
469 * for many (perhaps) independent connections. Values that are generated or
470 * calculated internally for the "session handle" MUST be defined within the
471 * 'struct urlstate' instead. The only exceptions MUST note the changes in
472 * the 'DynamicStatic' struct.
476 FILE *err; /* the stderr writes goes here */
477 char *errorbuffer; /* store failure messages in here */
478 char *proxyuserpwd; /* Proxy <user:password>, if used */
479 long proxyport; /* If non-zero, use this port number by default. If the
480 proxy string features a ":[port]" that one will override
482 void *out; /* the fetched file goes here */
483 void *in; /* the uploaded file is read from here */
484 void *writeheader; /* write the header to this is non-NULL */
485 char *set_url; /* what original URL to work on */
486 char *set_proxy; /* proxy to use */
487 long use_port; /* which port to use (when not using default) */
488 char *userpwd; /* <user:password>, if used */
489 char *set_range; /* range, if used. See README for detailed specification
491 long followlocation; /* as in HTTP Location: */
492 long maxredirs; /* maximum no. of http(s) redirects to follow */
493 char *set_referer; /* custom string */
494 bool free_referer; /* set TRUE if 'referer' points to a string we
496 char *useragent; /* User-Agent string */
497 char *postfields; /* if POST, set the fields' values here */
498 size_t postfieldsize; /* if POST, this might have a size to use instead of
499 strlen(), and then the data *may* be binary (contain
501 char *ftpport; /* port to send with the FTP PORT command */
502 char *device; /* network interface to use */
503 curl_write_callback fwrite; /* function that stores the output */
504 curl_write_callback fwrite_header; /* function that stores headers */
505 curl_read_callback fread; /* function that reads the input */
506 curl_progress_callback fprogress; /* function for progress information */
507 void *progress_client; /* pointer to pass to the progress callback */
508 curl_passwd_callback fpasswd; /* call for password */
509 void *passwd_client; /* pass to the passwd callback */
510 long timeout; /* in seconds, 0 means no timeout */
511 long connecttimeout; /* in seconds, 0 means no timeout */
512 long infilesize; /* size of file to upload, -1 means unknown */
513 long low_speed_limit; /* bytes/second */
514 long low_speed_time; /* number of seconds */
515 int set_resume_from; /* continue [ftp] transfer from here */
516 char *cookie; /* HTTP cookie string to send */
517 struct curl_slist *headers; /* linked list of extra headers */
518 struct HttpPost *httppost; /* linked list of POST data */
519 char *cert; /* PEM-formatted certificate */
520 char *cert_passwd; /* plain text certificate password */
521 char *cookiejar; /* dump all cookies to this file */
522 bool crlf; /* convert crlf on ftp upload(?) */
523 struct curl_slist *quote; /* before the transfer */
524 struct curl_slist *postquote; /* after the transfer */
525 struct curl_slist *telnet_options; /* linked list of telnet options */
526 curl_TimeCond timecondition; /* kind of time/date comparison */
527 time_t timevalue; /* what time to compare with */
528 curl_closepolicy closepolicy; /* connection cache close concept */
529 Curl_HttpReq httpreq; /* what kind of HTTP request (if any) is this */
530 char *customrequest; /* HTTP/FTP request to use */
531 long httpversion; /* when non-zero, a specific HTTP version requested to
532 be used in the library's request(s) */
533 char *auth_host; /* if set, this is the allocated string to the host name
534 * to which to send the authorization data to, and no other
535 * host (which location-following otherwise could lead to)
537 char *krb4_level; /* what security level */
538 struct ssl_config_data ssl; /* user defined SSL stuff */
540 /* Here follows boolean settings that define how to behave during
541 this session. They are STATIC, set by libcurl users or at least initially
542 and they don't change during operations. */
545 bool tunnel_thru_httpproxy;
551 bool http_fail_on_error;
552 bool http_follow_location;
553 bool http_include_header;
554 bool http_set_referer;
555 bool http_auto_referer; /* set "correct" referer when following location: */
561 bool krb4; /* kerberos4 connection requested */
562 bool reuse_forbid; /* forbidden to be reused, close after use */
563 bool reuse_fresh; /* do not re-use an existing connection */
564 bool expect100header; /* TRUE if we added Expect: 100-continue */
568 * In August 2001, this struct was redesigned and is since stricter than
569 * before. The 'connectdata' struct MUST have all the connection oriented
570 * stuff as we may now have several simultaneous connections and connection
573 * From now on, the 'SessionHandle' must only contain data that is set once to
574 * go for many (perhaps) independent connections. Values that are generated or
575 * calculated internally for the "session handle" must be defined within the
576 * 'struct urlstate' instead. */
578 struct SessionHandle {
579 struct UserDefined set; /* values set by the libcurl user */
580 struct DynamicStatic change; /* possibly modified userdefined data */
582 struct CookieInfo *cookies; /* the cookies, read from files and servers */
583 struct Progress progress; /* for all the progress meter data */
584 struct UrlState state; /* struct for fields used for state info and
585 other dynamic purposes */
586 struct PureInfo info; /* stats, reports and info data */
589 #define LIBCURL_NAME "libcurl"