3 /***************************************************************************
5 * Project ___| | | | _ \| |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
10 * Copyright (C) 1998 - 2002, Daniel Stenberg, <daniel@haxx.se>, et al.
12 * This software is licensed as described in the file COPYING, which
13 * you should have received as part of this distribution. The terms
14 * are also available at http://curl.haxx.se/docs/copyright.html.
16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
17 * copies of the Software, and permit persons to whom the Software is
18 * furnished to do so, under the terms of the COPYING file.
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 */
31 #define PORT_TELNET 23
32 #define PORT_GOPHER 70
34 #define PORT_HTTPS 443
35 #define PORT_DICT 2628
38 #define DICT_MATCH "/MATCH:"
39 #define DICT_MATCH2 "/M:"
40 #define DICT_MATCH3 "/FIND:"
41 #define DICT_DEFINE "/DEFINE:"
42 #define DICT_DEFINE2 "/D:"
43 #define DICT_DEFINE3 "/LOOKUP:"
45 #define CURL_DEFAULT_USER "anonymous"
46 #define CURL_DEFAULT_PASSWORD "curl_by_daniel@haxx.se"
52 /* SSLeay stuff usually in /usr/local/ssl/include */
54 #include "openssl/rsa.h"
55 #include "openssl/crypto.h"
56 #include "openssl/x509.h"
57 #include "openssl/pem.h"
58 #include "openssl/ssl.h"
59 #include "openssl/err.h"
60 #ifdef HAVE_OPENSSL_ENGINE_H
61 #include <openssl/engine.h>
73 #ifdef HAVE_NETINET_IN_H
74 #include <netinet/in.h>
79 #include <curl/curl.h>
81 #include "http_chunks.h" /* for the structs and enum stuff */
86 #include <zlib.h> /* for content-encoding 08/28/02 jhrg */
89 /* Download buffer size, keep it fairly big for speed reasons */
90 #define BUFSIZE CURL_MAX_WRITE_SIZE
92 /* Initial size of the buffer to store headers in, it'll be enlarged in case
94 #define HEADERSIZE 256
96 /* Just a convenience macro to get the larger value out of two given */
98 #define MAX(x,y) ((x)>(y)?(x):(y))
102 /* Types needed for krb4-ftp connections */
109 enum protection_level {
117 #ifndef HAVE_OPENSSL_ENGINE_H
120 /* struct for data related to SSL and SSL connections */
121 struct ssl_connect_data {
122 bool use; /* use ssl encrypted communications TRUE/FALSE */
124 /* these ones requires specific SSL-types */
128 #endif /* USE_SSLEAY */
131 /* information about one single SSL session */
132 struct curl_ssl_session {
133 char *name; /* host name for which this ID was used */
134 void *sessionid; /* as returned from the SSL layer */
135 long age; /* just a number, the higher the more recent */
136 unsigned short remote_port; /* remote port to connect to */
139 struct ssl_config_data {
140 long version; /* what version the client wants to use */
141 long certverifyresult; /* result from the certificate verification */
142 long verifypeer; /* set TRUE if this is desired */
143 long verifyhost; /* 0: no verify
144 1: check that CN exists
145 2: CN must match hostname */
146 char *CApath; /* DOES NOT WORK ON WINDOWS */
147 char *CAfile; /* cerficate to verify peer against */
148 char *random_file; /* path to file containing "random" data */
149 char *egdsocket; /* path to file containing the EGD daemon socket */
150 char *cipher_list; /* list of ciphers to use */
151 long numsessions; /* SSL session id cache size */
154 /****************************************************************************
156 ***************************************************************************/
158 struct FormData *sendit;
160 const char *p_pragma; /* Pragma: string */
161 const char *p_accept; /* Accept: string */
165 /* For FORM posting */
167 struct Curl_chunker chunk;
170 /****************************************************************************
172 ***************************************************************************/
175 char *user; /* user name string */
176 char *passwd; /* password string */
177 char *urlpath; /* the originally given path part of the URL */
178 char *dir; /* decoded directory */
179 char *file; /* decoded file */
181 char *entrypath; /* the PWD reply when we logged on */
183 char *cache; /* data cache between getresponse()-calls */
184 size_t cache_size; /* size of cache in bytes */
185 bool dont_check; /* Set to TRUE to prevent the final (post-transfer)
186 file size and 226/250 status check. It should still
187 read the line, just ignore the result. */
188 bool no_transfer; /* nothing was transfered, (possibly because a resumed
189 transfer already was complete) */
190 long response_time; /* When no timeout is given, this is the amount of
191 seconds we await for an FTP response. Initialized
192 in Curl_ftp_connect() */
195 /****************************************************************************
197 ***************************************************************************/
199 int fd; /* open file descriptor to read from! */
203 * Boolean values that concerns this connection.
206 bool close; /* if set, we close the connection after this request */
207 bool reuse; /* if set, this is a re-used connection */
208 bool chunk; /* if set, this is a chunked transfer-encoding */
209 bool httpproxy; /* if set, this transfer is done through a http proxy */
210 bool user_passwd; /* do we use user+password for this connection? */
211 bool proxy_user_passwd; /* user+password for the proxy? */
212 bool ipv6_ip; /* we communicate with a remove site specified with pure IPv6
215 bool rangestringalloc; /* the range string is malloc()'ed */
217 bool do_more; /* this is set TRUE if the ->curl_do_more() function is
218 supposed to be called, after ->curl_do() */
220 bool upload_chunky; /* set TRUE if we are doing chunked transfer-encoding
223 bool getheader; /* TRUE if header parsing is wanted */
227 * This struct is all the previously local variables from Curl_perform() moved
228 * to struct to allow the function to return and get re-invoked better without
232 struct Curl_transfer_keeper {
233 int bytecount; /* total number of bytes read */
234 int writebytecount; /* number of bytes written */
235 long contentlength; /* size of incoming data */
236 struct timeval start; /* transfer started at this time */
237 struct timeval now; /* current time */
238 bool header; /* incoming data has HTTP header */
240 HEADER_NORMAL, /* no bad header at all */
241 HEADER_PARTHEADER, /* part of the chunk is a bad header, the rest is
243 HEADER_ALLBAD /* all was believed to be header */
244 } badheader; /* the header was deemed bad and will be
246 int headerline; /* counts header lines to better track the
248 char *hbufp; /* points at *end* of header line */
250 char *str; /* within buf */
251 char *str_start; /* within buf */
252 char *end_ptr; /* within buf */
253 char *p; /* within headerbuff */
254 bool content_range; /* set TRUE if Content-Range: was found */
255 int offset; /* possible resume offset read from the
256 Content-Range: header */
257 int httpcode; /* error code from the 'HTTP/1.? XXX' line */
258 int httpversion; /* the HTTP version*10 */
259 bool write_after_100_header; /* should we enable the write after
260 we received a 100-continue/timeout
262 int content_encoding; /* What content encoding. sec 3.5, RFC2616. */
264 #define IDENTITY 0 /* No encoding */
265 #define DEFLATE 1 /* zlib delfate [RFC 1950 & 1951] */
266 #define GZIP 2 /* gzip algorithm [RFC 1952] */
267 #define COMPRESS 3 /* Not handled, added for completeness */
270 bool zlib_init; /* True if zlib already initialized;
271 undefined if Content-Encdoing header. */
272 z_stream z; /* State structure for zlib. */
275 /* for the low speed checks: */
284 /* pointers to the actual descriptors we check */
288 /* the file descriptors to play with */
295 bool upload_done; /* set to TRUE when doing chunked transfer-encoding upload
296 and we're uploading the last chunk */
301 * The connectdata struct contains all fields and variables that should be
302 * unique for an entire connection.
305 /**** Fields set when inited and not modified again */
306 struct SessionHandle *data; /* link to the root CURL struct */
307 int connectindex; /* what index in the connects index this particular
310 long protocol; /* PROT_* flags concerning the protocol set */
311 #define PROT_MISSING (1<<0)
312 #define PROT_GOPHER (1<<1)
313 #define PROT_HTTP (1<<2)
314 #define PROT_HTTPS (1<<3)
315 #define PROT_FTP (1<<4)
316 #define PROT_TELNET (1<<5)
317 #define PROT_DICT (1<<6)
318 #define PROT_LDAP (1<<7)
319 #define PROT_FILE (1<<8)
320 #define PROT_FTPS (1<<9)
321 #define PROT_SSL (1<<10) /* protocol requires SSL */
323 /* the particular host we use, in two different ways */
324 struct Curl_dns_entry *connect_addr;
327 struct addrinfo *serv_addr;
329 struct sockaddr_in serv_addr;
331 char protostr[64]; /* store the protocol string in this buffer */
332 char gname[513]; /* store the hostname in this buffer */
333 char *name; /* host name pointer to fool around with */
334 char *path; /* allocated buffer to store the URL's path part in */
335 char *hostname; /* hostname to connect, as parsed from url */
336 long port; /* which port to use locally */
337 unsigned short remote_port; /* what remote port to connect to,
338 not the proxy port! */
341 long headerbytecount; /* only count received headers */
343 char *range; /* range, if used. See README for detailed specification on
345 ssize_t resume_from; /* continue [ftp] transfer from here */
347 char *proxyhost; /* name of the http proxy host */
349 struct timeval now; /* "current" time */
350 struct timeval created; /* creation time */
351 int firstsocket; /* the main socket to use */
352 int secondarysocket; /* for i.e ftp transfers */
353 long maxdownload; /* in bytes, the maximum amount of data to fetch, 0
356 struct ssl_connect_data ssl; /* this is for ssl-stuff */
358 struct ConnectBits bits; /* various state-flags for this connection */
360 /* These two functions MUST be set by the curl_connect() function to be
361 be protocol dependent */
362 CURLcode (*curl_do)(struct connectdata *connect);
363 CURLcode (*curl_done)(struct connectdata *connect);
365 /* If the curl_do() function is better made in two halves, this
366 * curl_do_more() function will be called afterwards, if set. For example
367 * for doing the FTP stuff after the PASV/PORT command.
369 CURLcode (*curl_do_more)(struct connectdata *connect);
371 /* This function *MAY* be set to a protocol-dependent function that is run
372 * after the connect() and everything is done, as a step in the connection.
374 CURLcode (*curl_connect)(struct connectdata *connect);
376 /* This function *MAY* be set to a protocol-dependent function that is run
377 * by the curl_disconnect(), as a step in the disconnection.
379 CURLcode (*curl_disconnect)(struct connectdata *connect);
381 /* This function *MAY* be set to a protocol-dependent function that is run
382 * in the curl_close() function if protocol-specific cleanups are required.
384 CURLcode (*curl_close)(struct connectdata *connect);
386 /**** curl_get() phase fields */
389 int sockfd; /* socket to read from or -1 */
390 int size; /* -1 if unknown at this point */
391 long *bytecountp; /* return number of bytes read or NULL */
394 int writesockfd; /* socket to write to, it may very well be
395 the same we read from. -1 disables */
396 long *writebytecountp; /* return number of bytes written or NULL */
398 /** Dynamicly allocated strings, may need to be freed before this **/
399 /** struct is killed. **/
400 struct dynamically_allocated_data {
401 char *proxyuserpwd; /* free later if not NULL! */
402 char *uagent; /* free later if not NULL! */
403 char *accept_encoding; /* free later if not NULL! 08/28/02 jhrg */
404 char *userpwd; /* free later if not NULL! */
405 char *rangeline; /* free later if not NULL! */
406 char *ref; /* free later if not NULL! */
407 char *cookie; /* free later if not NULL! */
408 char *host; /* free later if not NULL */
411 char *newurl; /* This can only be set if a Location: was in the
415 enum protection_level command_prot;
416 enum protection_level data_prot;
417 enum protection_level request_data_prot;
421 struct krb4buffer in_buffer, out_buffer;
425 struct Curl_sec_client_mech *mech;
426 struct sockaddr_in local_addr;
430 /*************** Request - specific items ************/
431 /* previously this was in the urldata struct */
434 struct HTTP *gopher; /* alias, just for the sake of being more readable */
435 struct HTTP *https; /* alias, just for the sake of being more readable */
438 void *telnet; /* private for telnet.c-eyes only */
439 #if 0 /* no need for special ones for these: */
446 /* This struct is inited when needed */
447 struct Curl_transfer_keeper keep;
449 /* 'upload_present' is used to keep a byte counter of how much data there is
450 still left in the buffer, aimed for upload. */
453 /* 'upload_fromhere' is used as a read-pointer when we uploaded parts of a
454 buffer, so the next read should read from where this pointer points to,
455 and the 'upload_present' contains the number of bytes available at this
457 char *upload_fromhere;
459 curl_read_callback fread; /* function that reads the input */
460 void *fread_in; /* pointer to pass to the fread() above */
463 /* The end of connectdata. 08/27/02 jhrg */
466 * Struct to keep statistical and informational data.
471 long filetime; /* If requested, this is might get set. Set to -1 if
472 the time was unretrievable */
473 long header_size; /* size of read header(s) in bytes */
474 long request_size; /* the amount of bytes sent in the request(s) */
476 char *contenttype; /* the content type of the object */
481 long lastshow; /* time() of the last displayed progress meter or NULL to
482 force redraw at next call */
488 double current_speed; /* uses the currently fastest transfer */
490 bool callback; /* set when progress callback is used */
491 int width; /* screen width at download start */
492 int flags; /* see progress.h */
501 double t_pretransfer;
502 double t_starttransfer;
505 struct timeval start;
506 struct timeval t_startsingle;
507 #define CURR_TIME (5+1) /* 6 entries for 5 seconds */
509 double speeder[ CURR_TIME ];
510 struct timeval speeder_time[ CURR_TIME ];
515 HTTPREQ_NONE, /* first in list */
518 HTTPREQ_POST_FORM, /* we make a difference internally */
521 HTTPREQ_LAST /* last in list */
525 * Values that are generated, temporary or calculated internally for a
526 * "session handle" must be defined within the 'struct urlstate'. This struct
527 * will be used within the SessionHandle struct. When the 'SessionHandle'
528 * struct is cloned, this data MUST NOT be copied.
530 * Remember that any "state" information goes globally for the curl handle.
531 * Session-data MUST be put in the connectdata struct and here. */
532 #define MAX_CURL_USER_LENGTH 256
533 #define MAX_CURL_PASSWORD_LENGTH 256
542 /* buffers to store authentication data in, as parsed from input options */
543 char user[MAX_CURL_USER_LENGTH];
544 char passwd[MAX_CURL_PASSWORD_LENGTH];
545 char proxyuser[MAX_CURL_USER_LENGTH];
546 char proxypasswd[MAX_CURL_PASSWORD_LENGTH];
548 struct timeval keeps_speed; /* for the progress meter really */
550 /* 'connects' will be an allocated array with pointers. If the pointer is
551 set, it holds an allocated connection. */
552 struct connectdata **connects;
553 long numconnects; /* size of the 'connects' array */
555 char *headerbuff; /* allocated buffer to store headers in */
556 int headersize; /* size of the allocation */
558 char buffer[BUFSIZE+1]; /* download buffer */
559 char uploadbuffer[BUFSIZE+1]; /* upload buffer */
560 double current_speed; /* the ProgressShow() funcion sets this */
562 bool this_is_a_follow; /* this is a followed Location: request */
564 char *auth_host; /* if set, this should be the host name that we will
565 sent authorization to, no else. Used to make Location:
566 following not keep sending user+password... This is
570 struct curl_ssl_session *session; /* array of 'numsessions' size */
571 long sessionage; /* number of the most recent session */
573 char scratch[BUFSIZE*2]; /* huge buffer when doing upload CRLF replacing */
574 bool errorbuf; /* Set to TRUE if the error buffer is already filled in.
575 This must be set to FALSE every time _easy_perform() is
579 /* storage for the previous bag^H^H^HSIGPIPE signal handler :-) */
580 void (*prev_signal)(int sig);
582 bool allow_port; /* Is set.use_port allowed to take effect or not. This
583 is always set TRUE when curl_easy_perform() is called. */
588 * This 'DynamicStatic' struct defines dynamic states that actually change
589 * values in the 'UserDefined' area, which MUST be taken into consideration
590 * if the UserDefined struct is cloned or similar. You can probably just
591 * copy these, but each one indicate a special action on other data.
594 struct DynamicStatic {
595 char *url; /* work URL, copied from UserDefined */
596 bool url_alloc; /* URL string is malloc()'ed */
597 char *proxy; /* work proxy, copied from UserDefined */
598 bool proxy_alloc; /* http proxy string is malloc()'ed */
599 char *referer; /* referer string */
600 bool referer_alloc; /* referer sting is malloc()ed */
601 struct curl_slist *cookielist; /* list of cookie files set by
602 curl_easy_setopt(COOKIEFILE) calls */
606 * This 'UserDefined' struct must only contain data that is set once to go
607 * for many (perhaps) independent connections. Values that are generated or
608 * calculated internally for the "session handle" MUST be defined within the
609 * 'struct urlstate' instead. The only exceptions MUST note the changes in
610 * the 'DynamicStatic' struct.
614 FILE *err; /* the stderr user data goes here */
615 void *debugdata; /* the data that will be passed to fdebug */
616 char *errorbuffer; /* store failure messages in here */
617 char *proxyuserpwd; /* Proxy <user:password>, if used */
618 long proxyport; /* If non-zero, use this port number by default. If the
619 proxy string features a ":[port]" that one will override
621 void *out; /* the fetched file goes here */
622 void *in; /* the uploaded file is read from here */
623 void *writeheader; /* write the header to this is non-NULL */
624 char *set_url; /* what original URL to work on */
625 char *set_proxy; /* proxy to use */
626 long use_port; /* which port to use (when not using default) */
627 char *userpwd; /* <user:password>, if used */
628 char *set_range; /* range, if used. See README for detailed specification
630 long followlocation; /* as in HTTP Location: */
631 long maxredirs; /* maximum no. of http(s) redirects to follow */
632 char *set_referer; /* custom string */
633 bool free_referer; /* set TRUE if 'referer' points to a string we
635 char *useragent; /* User-Agent string */
636 char *encoding; /* Accept-Encoding string */
637 char *postfields; /* if POST, set the fields' values here */
638 size_t postfieldsize; /* if POST, this might have a size to use instead of
639 strlen(), and then the data *may* be binary (contain
641 char *ftpport; /* port to send with the FTP PORT command */
642 char *device; /* network interface to use */
643 curl_write_callback fwrite; /* function that stores the output */
644 curl_write_callback fwrite_header; /* function that stores headers */
645 curl_read_callback fread; /* function that reads the input */
646 curl_progress_callback fprogress; /* function for progress information */
647 curl_debug_callback fdebug; /* function that write informational data */
648 void *progress_client; /* pointer to pass to the progress callback */
649 curl_passwd_callback fpasswd; /* call for password */
650 void *passwd_client; /* pass to the passwd callback */
651 long timeout; /* in seconds, 0 means no timeout */
652 long connecttimeout; /* in seconds, 0 means no timeout */
653 long infilesize; /* size of file to upload, -1 means unknown */
654 long low_speed_limit; /* bytes/second */
655 long low_speed_time; /* number of seconds */
656 int set_resume_from; /* continue [ftp] transfer from here */
657 char *cookie; /* HTTP cookie string to send */
658 struct curl_slist *headers; /* linked list of extra headers */
659 struct HttpPost *httppost; /* linked list of POST data */
660 char *cert; /* certificate */
661 char *cert_type; /* format for certificate (default: PEM) */
662 char *key; /* private key */
663 char *key_type; /* format for private key (default: PEM) */
664 char *key_passwd; /* plain text private key password */
665 char *crypto_engine; /* name of the crypto engine to use */
666 char *cookiejar; /* dump all cookies to this file */
667 bool cookiesession; /* new cookie session? */
668 bool crlf; /* convert crlf on ftp upload(?) */
669 struct curl_slist *quote; /* after connection is established */
670 struct curl_slist *postquote; /* after the transfer */
671 struct curl_slist *prequote; /* before the transfer, after type (Wesley Laxton)*/
672 struct curl_slist *telnet_options; /* linked list of telnet options */
673 curl_TimeCond timecondition; /* kind of time/date comparison */
674 time_t timevalue; /* what time to compare with */
675 curl_closepolicy closepolicy; /* connection cache close concept */
676 Curl_HttpReq httpreq; /* what kind of HTTP request (if any) is this */
677 char *customrequest; /* HTTP/FTP request to use */
678 long httpversion; /* when non-zero, a specific HTTP version requested to
679 be used in the library's request(s) */
680 char *auth_host; /* if set, this is the allocated string to the host name
681 * to which to send the authorization data to, and no other
682 * host (which location-following otherwise could lead to)
684 char *krb4_level; /* what security level */
685 struct ssl_config_data ssl; /* user defined SSL stuff */
687 curl_proxytype proxytype; /* what kind of proxy that is in use */
689 int dns_cache_timeout; /* DNS cache timeout */
690 long buffer_size; /* size of receive buffer to use */
692 char *private; /* Private data */
694 /* Here follows boolean settings that define how to behave during
695 this session. They are STATIC, set by libcurl users or at least initially
696 and they don't change during operations. */
699 bool tunnel_thru_httpproxy;
705 bool http_fail_on_error;
706 bool http_follow_location;
708 #define http_include_header include_header /* former name */
710 bool http_set_referer;
711 bool http_auto_referer; /* set "correct" referer when following location: */
715 enum CURL_NETRC_OPTION
716 use_netrc; /* defined in include/curl.h */
718 bool krb4; /* kerberos4 connection requested */
719 bool reuse_forbid; /* forbidden to be reused, close after use */
720 bool reuse_fresh; /* do not re-use an existing connection */
721 bool expect100header; /* TRUE if we added Expect: 100-continue */
722 bool ftp_use_epsv; /* if EPSV is to be attempted or not */
723 bool no_signal; /* do not use any signal/alarm handler */
725 bool global_dns_cache;
729 * In August 2001, this struct was redesigned and is since stricter than
730 * before. The 'connectdata' struct MUST have all the connection oriented
731 * stuff as we may now have several simultaneous connections and connection
734 * From now on, the 'SessionHandle' must only contain data that is set once to
735 * go for many (perhaps) independent connections. Values that are generated or
736 * calculated internally for the "session handle" must be defined within the
737 * 'struct urlstate' instead. */
739 struct SessionHandle {
740 curl_hash *hostcache;
741 curl_share *share; /* Share, handles global variable mutexing */
742 struct UserDefined set; /* values set by the libcurl user */
743 struct DynamicStatic change; /* possibly modified userdefined data */
745 struct CookieInfo *cookies; /* the cookies, read from files and servers */
746 struct Progress progress; /* for all the progress meter data */
747 struct UrlState state; /* struct for fields used for state info and
748 other dynamic purposes */
749 struct PureInfo info; /* stats, reports and info data */
752 #endif /* USE_SSLEAY */
755 #define LIBCURL_NAME "libcurl"