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)
226 #define PROT_SSL (1<<10) /* protocol requires SSL */
228 Curl_addrinfo *hostaddr; /* IP-protocol independent host info pointer list */
229 char *hostent_buf; /* pointer to allocated memory for name info */
232 struct addrinfo *serv_addr; /* the particular host we use */
234 struct sockaddr_in serv_addr;
236 char protostr[64]; /* store the protocol string in this buffer */
237 char gname[513]; /* store the hostname in this buffer */
238 char *name; /* host name pointer to fool around with */
239 char *path; /* allocated buffer to store the URL's path part in */
240 char *hostname; /* hostname to connect, as parsed from url */
241 long port; /* which port to use locally */
242 unsigned short remote_port; /* what remote port to connect to,
243 not the proxy port! */
246 long headerbytecount; /* only count received headers */
248 char *range; /* range, if used. See README for detailed specification on
250 ssize_t resume_from; /* continue [ftp] transfer from here */
252 char *proxyhost; /* name of the http proxy host */
254 struct timeval now; /* "current" time */
255 struct timeval created; /* creation time */
256 int firstsocket; /* the main socket to use */
257 int secondarysocket; /* for i.e ftp transfers */
259 long upload_bufsize; /* adjust as you see fit, never bigger than BUFSIZE
260 never smaller than UPLOAD_BUFSIZE */
262 long maxdownload; /* in bytes, the maximum amount of data to fetch, 0
265 struct ssl_connect_data ssl; /* this is for ssl-stuff */
267 struct ConnectBits bits; /* various state-flags for this connection */
269 /* These two functions MUST be set by the curl_connect() function to be
270 be protocol dependent */
271 CURLcode (*curl_do)(struct connectdata *connect);
272 CURLcode (*curl_done)(struct connectdata *connect);
274 /* This function *MAY* be set to a protocol-dependent function that is run
275 * after the connect() and everything is done, as a step in the connection.
277 CURLcode (*curl_connect)(struct connectdata *connect);
279 /* This function *MAY* be set to a protocol-dependent function that is run
280 * by the curl_disconnect(), as a step in the disconnection.
282 CURLcode (*curl_disconnect)(struct connectdata *connect);
284 /* This function *MAY* be set to a protocol-dependent function that is run
285 * in the curl_close() function if protocol-specific cleanups are required.
287 CURLcode (*curl_close)(struct connectdata *connect);
289 /**** curl_get() phase fields */
292 int sockfd; /* socket to read from or -1 */
293 int size; /* -1 if unknown at this point */
294 bool getheader; /* TRUE if header parsing is wanted */
295 long *bytecountp; /* return number of bytes read or NULL */
298 int writesockfd; /* socket to write to, it may very well be
299 the same we read from. -1 disables */
300 long *writebytecountp; /* return number of bytes written or NULL */
302 /** Dynamicly allocated strings, may need to be freed before this **/
303 /** struct is killed. **/
304 struct dynamically_allocated_data {
305 char *proxyuserpwd; /* free later if not NULL! */
306 char *uagent; /* free later if not NULL! */
307 char *userpwd; /* free later if not NULL! */
308 char *rangeline; /* free later if not NULL! */
309 char *ref; /* free later if not NULL! */
310 char *cookie; /* free later if not NULL! */
311 char *host; /* free later if not NULL */
314 char *newurl; /* This can only be set if a Location: was in the
318 enum protection_level command_prot;
319 enum protection_level data_prot;
320 enum protection_level request_data_prot;
324 struct krb4buffer in_buffer, out_buffer;
328 struct Curl_sec_client_mech *mech;
329 struct sockaddr_in local_addr;
333 /*************** Request - specific items ************/
334 /* previously this was in the urldata struct */
337 struct HTTP *gopher; /* alias, just for the sake of being more readable */
338 struct HTTP *https; /* alias, just for the sake of being more readable */
341 void *telnet; /* private for telnet.c-eyes only */
342 #if 0 /* no need for special ones for these: */
352 * Struct to keep statistical and informational data.
357 long filetime; /* If requested, this is might get set. Set to -1 if
358 the time was unretrievable */
359 long header_size; /* size of read header(s) in bytes */
360 long request_size; /* the amount of bytes sent in the request(s) */
365 long lastshow; /* time() of the last displayed progress meter or NULL to
366 force redraw at next call */
372 double current_speed; /* uses the currently fastest transfer */
374 bool callback; /* set when progress callback is used */
375 int width; /* screen width at download start */
376 int flags; /* see progress.h */
385 double t_pretransfer;
386 double t_starttransfer;
388 struct timeval start;
389 struct timeval t_startsingle;
390 #define CURR_TIME (5+1) /* 6 entries for 5 seconds */
392 double speeder[ CURR_TIME ];
393 struct timeval speeder_time[ CURR_TIME ];
398 HTTPREQ_NONE, /* first in list */
401 HTTPREQ_POST_FORM, /* we make a difference internally */
404 HTTPREQ_LAST /* last in list */
408 * Values that are generated, temporary or calculated internally for a
409 * "session handle" must be defined within the 'struct urlstate'. This struct
410 * will be used within the SessionHandle struct. When the 'SessionHandle'
411 * struct is cloned, this data MUST NOT be copied.
413 * Remember that any "state" information goes globally for the curl handle.
414 * Session-data MUST be put in the connectdata struct and here. */
415 #define MAX_CURL_USER_LENGTH 256
416 #define MAX_CURL_PASSWORD_LENGTH 256
419 /* buffers to store authentication data in, as parsed from input options */
420 char user[MAX_CURL_USER_LENGTH];
421 char passwd[MAX_CURL_PASSWORD_LENGTH];
422 char proxyuser[MAX_CURL_USER_LENGTH];
423 char proxypasswd[MAX_CURL_PASSWORD_LENGTH];
425 struct timeval keeps_speed; /* for the progress meter really */
427 /* 'connects' will be an allocated array with pointers. If the pointer is
428 set, it holds an allocated connection. */
429 struct connectdata **connects;
430 long numconnects; /* size of the 'connects' array */
432 char *headerbuff; /* allocated buffer to store headers in */
433 int headersize; /* size of the allocation */
435 char buffer[BUFSIZE+1]; /* buffer with size BUFSIZE */
437 double current_speed; /* the ProgressShow() funcion sets this */
439 bool this_is_a_follow; /* this is a followed Location: request */
441 char *auth_host; /* if set, this should be the host name that we will
442 sent authorization to, no else. Used to make Location:
443 following not keep sending user+password... This is
447 struct curl_ssl_session *session; /* array of 'numsessions' size */
448 long sessionage; /* number of the most recent session */
450 char scratch[BUFSIZE*2]; /* huge buffer when doing upload CRLF replacing */
451 bool errorbuf; /* Set to TRUE if the error buffer is already filled in.
452 This must be set to FALSE every time _easy_perform() is
458 * This 'DynamicStatic' struct defines dynamic states that actually change
459 * values in the 'UserDefined' area, which MUST be taken into consideration
460 * if the UserDefined struct is cloned or similar. You can probably just
461 * copy these, but each one indicate a special action on other data.
464 struct DynamicStatic {
465 char *url; /* work URL, copied from UserDefined */
466 bool url_alloc; /* URL string is malloc()'ed */
467 char *proxy; /* work proxy, copied from UserDefined */
468 bool proxy_alloc; /* http proxy string is malloc()'ed */
469 char *referer; /* referer string */
470 bool referer_alloc; /* referer sting is malloc()ed */
474 * This 'UserDefined' struct must only contain data that is set once to go
475 * for many (perhaps) independent connections. Values that are generated or
476 * calculated internally for the "session handle" MUST be defined within the
477 * 'struct urlstate' instead. The only exceptions MUST note the changes in
478 * the 'DynamicStatic' struct.
482 FILE *err; /* the stderr writes goes here */
483 char *errorbuffer; /* store failure messages in here */
484 char *proxyuserpwd; /* Proxy <user:password>, if used */
485 long proxyport; /* If non-zero, use this port number by default. If the
486 proxy string features a ":[port]" that one will override
488 void *out; /* the fetched file goes here */
489 void *in; /* the uploaded file is read from here */
490 void *writeheader; /* write the header to this is non-NULL */
491 char *set_url; /* what original URL to work on */
492 char *set_proxy; /* proxy to use */
493 long use_port; /* which port to use (when not using default) */
494 char *userpwd; /* <user:password>, if used */
495 char *set_range; /* range, if used. See README for detailed specification
497 long followlocation; /* as in HTTP Location: */
498 long maxredirs; /* maximum no. of http(s) redirects to follow */
499 char *set_referer; /* custom string */
500 bool free_referer; /* set TRUE if 'referer' points to a string we
502 char *useragent; /* User-Agent string */
503 char *postfields; /* if POST, set the fields' values here */
504 size_t postfieldsize; /* if POST, this might have a size to use instead of
505 strlen(), and then the data *may* be binary (contain
507 char *ftpport; /* port to send with the FTP PORT command */
508 char *device; /* network interface to use */
509 curl_write_callback fwrite; /* function that stores the output */
510 curl_write_callback fwrite_header; /* function that stores headers */
511 curl_read_callback fread; /* function that reads the input */
512 curl_progress_callback fprogress; /* function for progress information */
513 void *progress_client; /* pointer to pass to the progress callback */
514 curl_passwd_callback fpasswd; /* call for password */
515 void *passwd_client; /* pass to the passwd callback */
516 long timeout; /* in seconds, 0 means no timeout */
517 long connecttimeout; /* in seconds, 0 means no timeout */
518 long infilesize; /* size of file to upload, -1 means unknown */
519 long low_speed_limit; /* bytes/second */
520 long low_speed_time; /* number of seconds */
521 int set_resume_from; /* continue [ftp] transfer from here */
522 char *cookie; /* HTTP cookie string to send */
523 struct curl_slist *headers; /* linked list of extra headers */
524 struct HttpPost *httppost; /* linked list of POST data */
525 char *cert; /* PEM-formatted certificate */
526 char *cert_passwd; /* plain text certificate password */
527 char *cookiejar; /* dump all cookies to this file */
528 bool crlf; /* convert crlf on ftp upload(?) */
529 struct curl_slist *quote; /* before the transfer */
530 struct curl_slist *postquote; /* after the transfer */
531 struct curl_slist *telnet_options; /* linked list of telnet options */
532 curl_TimeCond timecondition; /* kind of time/date comparison */
533 time_t timevalue; /* what time to compare with */
534 curl_closepolicy closepolicy; /* connection cache close concept */
535 Curl_HttpReq httpreq; /* what kind of HTTP request (if any) is this */
536 char *customrequest; /* HTTP/FTP request to use */
537 long httpversion; /* when non-zero, a specific HTTP version requested to
538 be used in the library's request(s) */
539 char *auth_host; /* if set, this is the allocated string to the host name
540 * to which to send the authorization data to, and no other
541 * host (which location-following otherwise could lead to)
543 char *krb4_level; /* what security level */
544 struct ssl_config_data ssl; /* user defined SSL stuff */
546 /* Here follows boolean settings that define how to behave during
547 this session. They are STATIC, set by libcurl users or at least initially
548 and they don't change during operations. */
551 bool tunnel_thru_httpproxy;
557 bool http_fail_on_error;
558 bool http_follow_location;
559 bool http_include_header;
560 bool http_set_referer;
561 bool http_auto_referer; /* set "correct" referer when following location: */
567 bool krb4; /* kerberos4 connection requested */
568 bool reuse_forbid; /* forbidden to be reused, close after use */
569 bool reuse_fresh; /* do not re-use an existing connection */
570 bool expect100header; /* TRUE if we added Expect: 100-continue */
571 bool ftp_use_epsv; /* if EPSV is to be attempted or not */
575 * In August 2001, this struct was redesigned and is since stricter than
576 * before. The 'connectdata' struct MUST have all the connection oriented
577 * stuff as we may now have several simultaneous connections and connection
580 * From now on, the 'SessionHandle' must only contain data that is set once to
581 * go for many (perhaps) independent connections. Values that are generated or
582 * calculated internally for the "session handle" must be defined within the
583 * 'struct urlstate' instead. */
585 struct SessionHandle {
586 struct UserDefined set; /* values set by the libcurl user */
587 struct DynamicStatic change; /* possibly modified userdefined data */
589 struct CookieInfo *cookies; /* the cookies, read from files and servers */
590 struct Progress progress; /* for all the progress meter data */
591 struct UrlState state; /* struct for fields used for state info and
592 other dynamic purposes */
593 struct PureInfo info; /* stats, reports and info data */
596 #define LIBCURL_NAME "libcurl"