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"
61 #ifdef HAVE_OPENSSL_ENGINE_H
62 #include <openssl/engine.h>
74 #ifdef HAVE_NETINET_IN_H
75 #include <netinet/in.h>
80 #include <curl/curl.h>
82 #include "http_chunks.h" /* for the structs and enum stuff */
84 /* Download buffer size, keep it fairly big for speed reasons */
85 #define BUFSIZE (1024*50)
87 /* Defaul upload buffer size, keep it smallish to get faster progress meter
88 updates. This is just default, it is dynamic and adjusts to the upload
90 #define UPLOAD_BUFSIZE (1024*2)
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 verif, 1: check that CN exists, 2: CN must match hostname */
144 char *CApath; /* DOES NOT WORK ON WINDOWS */
145 char *CAfile; /* cerficate to verify peer against */
146 char *random_file; /* path to file containing "random" data */
147 char *egdsocket; /* path to file containing the EGD daemon socket */
148 char *cipher_list; /* list of ciphers to use */
150 long numsessions; /* SSL session id cache size */
153 /****************************************************************************
155 ***************************************************************************/
157 struct FormData *sendit;
159 const char *p_pragma; /* Pragma: string */
160 const char *p_accept; /* Accept: string */
164 /* For FORM posting */
166 curl_read_callback storefread;
169 struct Curl_chunker chunk;
172 /****************************************************************************
174 ***************************************************************************/
177 char *user; /* user name string */
178 char *passwd; /* password string */
179 char *urlpath; /* the originally given path part of the URL */
180 char *dir; /* decoded directory */
181 char *file; /* decoded file */
183 char *entrypath; /* the PWD reply when we logged on */
185 char *cache; /* data cache between getresponse()-calls */
186 size_t cache_size; /* size of cache in bytes */
189 /****************************************************************************
191 ***************************************************************************/
193 int fd; /* open file descriptor to read from! */
197 * Boolean values that concerns this connection.
200 bool close; /* if set, we close the connection after this request */
201 bool reuse; /* if set, this is a re-used connection */
202 bool chunk; /* if set, this is a chunked transfer-encoding */
203 bool httpproxy; /* if set, this transfer is done through a http proxy */
204 bool user_passwd; /* do we use user+password for this connection? */
205 bool proxy_user_passwd; /* user+password for the proxy? */
208 bool rangestringalloc; /* the range string is malloc()'ed */
210 bool resume_done; /* nothing was transfered, resumed transfer already
215 * The connectdata struct contains all fields and variables that should be
216 * unique for an entire connection.
219 /**** Fields set when inited and not modified again */
220 struct SessionHandle *data; /* link to the root CURL struct */
221 int connectindex; /* what index in the connects index this particular
224 long protocol; /* PROT_* flags concerning the protocol set */
225 #define PROT_MISSING (1<<0)
226 #define PROT_GOPHER (1<<1)
227 #define PROT_HTTP (1<<2)
228 #define PROT_HTTPS (1<<3)
229 #define PROT_FTP (1<<4)
230 #define PROT_TELNET (1<<5)
231 #define PROT_DICT (1<<6)
232 #define PROT_LDAP (1<<7)
233 #define PROT_FILE (1<<8)
234 #define PROT_FTPS (1<<9)
235 #define PROT_SSL (1<<10) /* protocol requires SSL */
237 Curl_addrinfo *hostaddr; /* IP-protocol independent host info pointer list */
238 char *hostent_buf; /* pointer to allocated memory for name info */
241 struct addrinfo *serv_addr; /* the particular host we use */
243 struct sockaddr_in serv_addr;
245 char protostr[64]; /* store the protocol string in this buffer */
246 char gname[513]; /* store the hostname in this buffer */
247 char *name; /* host name pointer to fool around with */
248 char *path; /* allocated buffer to store the URL's path part in */
249 char *hostname; /* hostname to connect, as parsed from url */
250 long port; /* which port to use locally */
251 unsigned short remote_port; /* what remote port to connect to,
252 not the proxy port! */
255 long headerbytecount; /* only count received headers */
257 char *range; /* range, if used. See README for detailed specification on
259 ssize_t resume_from; /* continue [ftp] transfer from here */
261 char *proxyhost; /* name of the http proxy host */
263 struct timeval now; /* "current" time */
264 struct timeval created; /* creation time */
265 int firstsocket; /* the main socket to use */
266 int secondarysocket; /* for i.e ftp transfers */
268 long upload_bufsize; /* adjust as you see fit, never bigger than BUFSIZE
269 never smaller than UPLOAD_BUFSIZE */
271 long maxdownload; /* in bytes, the maximum amount of data to fetch, 0
274 struct ssl_connect_data ssl; /* this is for ssl-stuff */
276 struct ConnectBits bits; /* various state-flags for this connection */
278 /* These two functions MUST be set by the curl_connect() function to be
279 be protocol dependent */
280 CURLcode (*curl_do)(struct connectdata *connect);
281 CURLcode (*curl_done)(struct connectdata *connect);
283 /* This function *MAY* be set to a protocol-dependent function that is run
284 * after the connect() and everything is done, as a step in the connection.
286 CURLcode (*curl_connect)(struct connectdata *connect);
288 /* This function *MAY* be set to a protocol-dependent function that is run
289 * by the curl_disconnect(), as a step in the disconnection.
291 CURLcode (*curl_disconnect)(struct connectdata *connect);
293 /* This function *MAY* be set to a protocol-dependent function that is run
294 * in the curl_close() function if protocol-specific cleanups are required.
296 CURLcode (*curl_close)(struct connectdata *connect);
298 /**** curl_get() phase fields */
301 int sockfd; /* socket to read from or -1 */
302 int size; /* -1 if unknown at this point */
303 bool getheader; /* TRUE if header parsing is wanted */
304 long *bytecountp; /* return number of bytes read or NULL */
307 int writesockfd; /* socket to write to, it may very well be
308 the same we read from. -1 disables */
309 long *writebytecountp; /* return number of bytes written or NULL */
311 /** Dynamicly allocated strings, may need to be freed before this **/
312 /** struct is killed. **/
313 struct dynamically_allocated_data {
314 char *proxyuserpwd; /* free later if not NULL! */
315 char *uagent; /* free later if not NULL! */
316 char *userpwd; /* free later if not NULL! */
317 char *rangeline; /* free later if not NULL! */
318 char *ref; /* free later if not NULL! */
319 char *cookie; /* free later if not NULL! */
320 char *host; /* free later if not NULL */
323 char *newurl; /* This can only be set if a Location: was in the
327 enum protection_level command_prot;
328 enum protection_level data_prot;
329 enum protection_level request_data_prot;
333 struct krb4buffer in_buffer, out_buffer;
337 struct Curl_sec_client_mech *mech;
338 struct sockaddr_in local_addr;
342 /*************** Request - specific items ************/
343 /* previously this was in the urldata struct */
346 struct HTTP *gopher; /* alias, just for the sake of being more readable */
347 struct HTTP *https; /* alias, just for the sake of being more readable */
350 void *telnet; /* private for telnet.c-eyes only */
351 #if 0 /* no need for special ones for these: */
361 * Struct to keep statistical and informational data.
366 long filetime; /* If requested, this is might get set. Set to -1 if
367 the time was unretrievable */
368 long header_size; /* size of read header(s) in bytes */
369 long request_size; /* the amount of bytes sent in the request(s) */
374 long lastshow; /* time() of the last displayed progress meter or NULL to
375 force redraw at next call */
381 double current_speed; /* uses the currently fastest transfer */
383 bool callback; /* set when progress callback is used */
384 int width; /* screen width at download start */
385 int flags; /* see progress.h */
394 double t_pretransfer;
395 double t_starttransfer;
397 struct timeval start;
398 struct timeval t_startsingle;
399 #define CURR_TIME (5+1) /* 6 entries for 5 seconds */
401 double speeder[ CURR_TIME ];
402 struct timeval speeder_time[ CURR_TIME ];
407 HTTPREQ_NONE, /* first in list */
410 HTTPREQ_POST_FORM, /* we make a difference internally */
413 HTTPREQ_LAST /* last in list */
417 * Values that are generated, temporary or calculated internally for a
418 * "session handle" must be defined within the 'struct urlstate'. This struct
419 * will be used within the SessionHandle struct. When the 'SessionHandle'
420 * struct is cloned, this data MUST NOT be copied.
422 * Remember that any "state" information goes globally for the curl handle.
423 * Session-data MUST be put in the connectdata struct and here. */
424 #define MAX_CURL_USER_LENGTH 256
425 #define MAX_CURL_PASSWORD_LENGTH 256
428 /* buffers to store authentication data in, as parsed from input options */
429 char user[MAX_CURL_USER_LENGTH];
430 char passwd[MAX_CURL_PASSWORD_LENGTH];
431 char proxyuser[MAX_CURL_USER_LENGTH];
432 char proxypasswd[MAX_CURL_PASSWORD_LENGTH];
434 struct timeval keeps_speed; /* for the progress meter really */
436 /* 'connects' will be an allocated array with pointers. If the pointer is
437 set, it holds an allocated connection. */
438 struct connectdata **connects;
439 long numconnects; /* size of the 'connects' array */
441 char *headerbuff; /* allocated buffer to store headers in */
442 int headersize; /* size of the allocation */
444 char buffer[BUFSIZE+1]; /* buffer with size BUFSIZE */
446 double current_speed; /* the ProgressShow() funcion sets this */
448 bool this_is_a_follow; /* this is a followed Location: request */
450 char *auth_host; /* if set, this should be the host name that we will
451 sent authorization to, no else. Used to make Location:
452 following not keep sending user+password... This is
456 struct curl_ssl_session *session; /* array of 'numsessions' size */
457 long sessionage; /* number of the most recent session */
459 char scratch[BUFSIZE*2]; /* huge buffer when doing upload CRLF replacing */
460 bool errorbuf; /* Set to TRUE if the error buffer is already filled in.
461 This must be set to FALSE every time _easy_perform() is
467 * This 'DynamicStatic' struct defines dynamic states that actually change
468 * values in the 'UserDefined' area, which MUST be taken into consideration
469 * if the UserDefined struct is cloned or similar. You can probably just
470 * copy these, but each one indicate a special action on other data.
473 struct DynamicStatic {
474 char *url; /* work URL, copied from UserDefined */
475 bool url_alloc; /* URL string is malloc()'ed */
476 char *proxy; /* work proxy, copied from UserDefined */
477 bool proxy_alloc; /* http proxy string is malloc()'ed */
478 char *referer; /* referer string */
479 bool referer_alloc; /* referer sting is malloc()ed */
483 * This 'UserDefined' struct must only contain data that is set once to go
484 * for many (perhaps) independent connections. Values that are generated or
485 * calculated internally for the "session handle" MUST be defined within the
486 * 'struct urlstate' instead. The only exceptions MUST note the changes in
487 * the 'DynamicStatic' struct.
491 FILE *err; /* the stderr writes goes here */
492 char *errorbuffer; /* store failure messages in here */
493 char *proxyuserpwd; /* Proxy <user:password>, if used */
494 long proxyport; /* If non-zero, use this port number by default. If the
495 proxy string features a ":[port]" that one will override
497 void *out; /* the fetched file goes here */
498 void *in; /* the uploaded file is read from here */
499 void *writeheader; /* write the header to this is non-NULL */
500 char *set_url; /* what original URL to work on */
501 char *set_proxy; /* proxy to use */
502 long use_port; /* which port to use (when not using default) */
503 char *userpwd; /* <user:password>, if used */
504 char *set_range; /* range, if used. See README for detailed specification
506 long followlocation; /* as in HTTP Location: */
507 long maxredirs; /* maximum no. of http(s) redirects to follow */
508 char *set_referer; /* custom string */
509 bool free_referer; /* set TRUE if 'referer' points to a string we
511 char *useragent; /* User-Agent string */
512 char *postfields; /* if POST, set the fields' values here */
513 size_t postfieldsize; /* if POST, this might have a size to use instead of
514 strlen(), and then the data *may* be binary (contain
516 char *ftpport; /* port to send with the FTP PORT command */
517 char *device; /* network interface to use */
518 curl_write_callback fwrite; /* function that stores the output */
519 curl_write_callback fwrite_header; /* function that stores headers */
520 curl_read_callback fread; /* function that reads the input */
521 curl_progress_callback fprogress; /* function for progress information */
522 void *progress_client; /* pointer to pass to the progress callback */
523 curl_passwd_callback fpasswd; /* call for password */
524 void *passwd_client; /* pass to the passwd callback */
525 long timeout; /* in seconds, 0 means no timeout */
526 long connecttimeout; /* in seconds, 0 means no timeout */
527 long infilesize; /* size of file to upload, -1 means unknown */
528 long low_speed_limit; /* bytes/second */
529 long low_speed_time; /* number of seconds */
530 int set_resume_from; /* continue [ftp] transfer from here */
531 char *cookie; /* HTTP cookie string to send */
532 struct curl_slist *headers; /* linked list of extra headers */
533 struct HttpPost *httppost; /* linked list of POST data */
534 char *cert; /* certificate */
535 char *cert_type; /* format for certificate (default: PEM) */
536 char *key; /* private key */
537 char *key_type; /* format for private key (default: PEM) */
538 char *key_passwd; /* plain text private key password */
539 char *crypto_engine; /* name of the crypto engine to use */
540 char *cookiejar; /* dump all cookies to this file */
541 bool crlf; /* convert crlf on ftp upload(?) */
542 struct curl_slist *quote; /* before the transfer */
543 struct curl_slist *postquote; /* after the transfer */
544 struct curl_slist *telnet_options; /* linked list of telnet options */
545 curl_TimeCond timecondition; /* kind of time/date comparison */
546 time_t timevalue; /* what time to compare with */
547 curl_closepolicy closepolicy; /* connection cache close concept */
548 Curl_HttpReq httpreq; /* what kind of HTTP request (if any) is this */
549 char *customrequest; /* HTTP/FTP request to use */
550 long httpversion; /* when non-zero, a specific HTTP version requested to
551 be used in the library's request(s) */
552 char *auth_host; /* if set, this is the allocated string to the host name
553 * to which to send the authorization data to, and no other
554 * host (which location-following otherwise could lead to)
556 char *krb4_level; /* what security level */
557 struct ssl_config_data ssl; /* user defined SSL stuff */
559 /* Here follows boolean settings that define how to behave during
560 this session. They are STATIC, set by libcurl users or at least initially
561 and they don't change during operations. */
564 bool tunnel_thru_httpproxy;
570 bool http_fail_on_error;
571 bool http_follow_location;
574 #define http_include_header include_header /* former name */
576 bool http_set_referer;
577 bool http_auto_referer; /* set "correct" referer when following location: */
583 bool krb4; /* kerberos4 connection requested */
584 bool reuse_forbid; /* forbidden to be reused, close after use */
585 bool reuse_fresh; /* do not re-use an existing connection */
586 bool expect100header; /* TRUE if we added Expect: 100-continue */
587 bool ftp_use_epsv; /* if EPSV is to be attempted or not */
591 * In August 2001, this struct was redesigned and is since stricter than
592 * before. The 'connectdata' struct MUST have all the connection oriented
593 * stuff as we may now have several simultaneous connections and connection
596 * From now on, the 'SessionHandle' must only contain data that is set once to
597 * go for many (perhaps) independent connections. Values that are generated or
598 * calculated internally for the "session handle" must be defined within the
599 * 'struct urlstate' instead. */
601 struct SessionHandle {
602 struct UserDefined set; /* values set by the libcurl user */
603 struct DynamicStatic change; /* possibly modified userdefined data */
605 struct CookieInfo *cookies; /* the cookies, read from files and servers */
606 struct Progress progress; /* for all the progress meter data */
607 struct UrlState state; /* struct for fields used for state info and
608 other dynamic purposes */
609 struct PureInfo info; /* stats, reports and info data */
612 #endif /* USE_SSLEAY */
615 #define LIBCURL_NAME "libcurl"