1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ***************************************************************************/
23 #include "curl_setup.h"
25 #ifdef HAVE_NETINET_IN_H
26 #include <netinet/in.h>
31 #ifdef HAVE_ARPA_INET_H
32 #include <arpa/inet.h>
37 #ifdef HAVE_SYS_IOCTL_H
38 #include <sys/ioctl.h>
41 #ifdef HAVE_SYS_PARAM_H
42 #include <sys/param.h>
51 #error "We can't compile without socket() support!"
61 #include <stringprep.h>
62 #ifdef HAVE_IDN_FREE_H
65 /* prototype from idn-free.h, not provided by libidn 0.4.5's make install! */
66 void idn_free (void *ptr);
69 /* if idn_free() was not found in this version of libidn use free() instead */
70 #define idn_free(x) (free)(x)
72 #elif defined(USE_WIN32_IDN)
73 /* prototype for curl_win32_idn_to_ascii() */
74 int curl_win32_idn_to_ascii(const char *in, char **out);
75 #endif /* USE_LIBIDN */
92 #include "content_encoding.h"
93 #include "http_digest.h"
94 #include "http_negotiate.h"
98 #include "speedcheck.h"
100 #include "warnless.h"
101 #include "non-ascii.h"
102 #include "inet_pton.h"
104 /* And now for the protocols */
111 #include "curl_ldap.h"
116 #include "inet_ntop.h"
117 #include "curl_ntlm.h"
118 #include "curl_ntlm_wb.h"
120 #include "curl_rtmp.h"
122 #include "http_proxy.h"
124 #include "conncache.h"
125 #include "multihandle.h"
126 #include "pipeline.h"
129 #define _MPRINTF_REPLACE /* use our functions only */
130 #include <curl/mprintf.h>
132 #include "curl_memory.h"
133 /* The last #include file should be: */
134 #include "memdebug.h"
136 /* Local static prototypes */
137 static struct connectdata *
138 find_oldest_idle_connection(struct SessionHandle *data);
139 static struct connectdata *
140 find_oldest_idle_connection_in_bundle(struct SessionHandle *data,
141 struct connectbundle *bundle);
142 static void conn_free(struct connectdata *conn);
143 static void signalPipeClose(struct curl_llist *pipeline, bool pipe_broke);
144 static CURLcode do_init(struct connectdata *conn);
145 static CURLcode parse_url_login(struct SessionHandle *data,
146 struct connectdata *conn,
147 char **userptr, char **passwdptr,
149 static CURLcode parse_login_details(const char *login, const size_t len,
150 char **userptr, char **passwdptr,
156 static const struct Curl_handler * const protocols[] = {
158 #ifndef CURL_DISABLE_HTTP
162 #if defined(USE_SSL) && !defined(CURL_DISABLE_HTTP)
166 #ifndef CURL_DISABLE_FTP
170 #if defined(USE_SSL) && !defined(CURL_DISABLE_FTP)
174 #ifndef CURL_DISABLE_TELNET
175 &Curl_handler_telnet,
178 #ifndef CURL_DISABLE_DICT
182 #ifndef CURL_DISABLE_LDAP
184 #if !defined(CURL_DISABLE_LDAPS) && \
185 ((defined(USE_OPENLDAP) && defined(USE_SSL)) || \
186 (!defined(USE_OPENLDAP) && defined(HAVE_LDAP_SSL)))
191 #ifndef CURL_DISABLE_FILE
195 #ifndef CURL_DISABLE_TFTP
204 #ifndef CURL_DISABLE_IMAP
211 #ifndef CURL_DISABLE_POP3
218 #ifndef CURL_DISABLE_SMTP
225 #ifndef CURL_DISABLE_RTSP
229 #ifndef CURL_DISABLE_GOPHER
230 &Curl_handler_gopher,
237 &Curl_handler_rtmpte,
239 &Curl_handler_rtmpts,
242 (struct Curl_handler *) NULL
246 * Dummy handler for undefined protocol schemes.
249 static const struct Curl_handler Curl_handler_dummy = {
250 "<no protocol>", /* scheme */
251 ZERO_NULL, /* setup_connection */
252 ZERO_NULL, /* do_it */
253 ZERO_NULL, /* done */
254 ZERO_NULL, /* do_more */
255 ZERO_NULL, /* connect_it */
256 ZERO_NULL, /* connecting */
257 ZERO_NULL, /* doing */
258 ZERO_NULL, /* proto_getsock */
259 ZERO_NULL, /* doing_getsock */
260 ZERO_NULL, /* domore_getsock */
261 ZERO_NULL, /* perform_getsock */
262 ZERO_NULL, /* disconnect */
263 ZERO_NULL, /* readwrite */
266 PROTOPT_NONE /* flags */
269 void Curl_freeset(struct SessionHandle *data)
271 /* Free all dynamic strings stored in the data->set substructure. */
273 for(i=(enum dupstring)0; i < STRING_LAST; i++)
274 Curl_safefree(data->set.str[i]);
276 if(data->change.referer_alloc) {
277 Curl_safefree(data->change.referer);
278 data->change.referer_alloc = FALSE;
280 data->change.referer = NULL;
283 static CURLcode setstropt(char **charp, char *s)
285 /* Release the previous storage at `charp' and replace by a dynamic storage
286 copy of `s'. Return CURLE_OK or CURLE_OUT_OF_MEMORY. */
288 Curl_safefree(*charp);
294 return CURLE_OUT_OF_MEMORY;
302 static CURLcode setstropt_userpwd(char *option, char **userp, char **passwdp)
304 CURLcode result = CURLE_OK;
308 /* Parse the login details if specified. It not then we treat NULL as a hint
309 to clear the existing data */
311 result = parse_login_details(option, strlen(option),
312 (userp ? &user : NULL),
313 (passwdp ? &passwd : NULL),
318 /* Store the username part of option if required */
320 if(!user && option && option[0] == ':') {
321 /* Allocate an empty string instead of returning NULL as user name */
324 result = CURLE_OUT_OF_MEMORY;
327 Curl_safefree(*userp);
331 /* Store the password part of option if required */
333 Curl_safefree(*passwdp);
341 CURLcode Curl_dupset(struct SessionHandle *dst, struct SessionHandle *src)
343 CURLcode r = CURLE_OK;
346 /* Copy src->set into dst->set first, then deal with the strings
350 /* clear all string pointers first */
351 memset(dst->set.str, 0, STRING_LAST * sizeof(char *));
353 /* duplicate all strings */
354 for(i=(enum dupstring)0; i< STRING_LAST; i++) {
355 r = setstropt(&dst->set.str[i], src->set.str[i]);
360 /* If a failure occurred, freeing has to be performed externally. */
365 * This is the internal function curl_easy_cleanup() calls. This should
366 * cleanup and free all resources associated with this sessionhandle.
368 * NOTE: if we ever add something that attempts to write to a socket or
369 * similar here, we must ignore SIGPIPE first. It is currently only done
370 * when curl_easy_perform() is invoked.
373 CURLcode Curl_close(struct SessionHandle *data)
375 struct Curl_multi *m;
380 Curl_expire(data, 0); /* shut off timers */
385 /* This handle is still part of a multi handle, take care of this first
386 and detach this handle from there. */
387 curl_multi_remove_handle(data->multi, data);
390 /* when curl_easy_perform() is used, it creates its own multi handle to
391 use and this is the one */
392 curl_multi_cleanup(data->multi_easy);
394 /* Destroy the timeout list that is held in the easy handle. It is
395 /normally/ done by curl_multi_remove_handle() but this is "just in
397 if(data->state.timeoutlist) {
398 Curl_llist_destroy(data->state.timeoutlist, NULL);
399 data->state.timeoutlist = NULL;
402 data->magic = 0; /* force a clear AFTER the possibly enforced removal from
403 the multi handle, since that function uses the magic
406 if(data->state.rangestringalloc)
407 free(data->state.range);
409 /* Free the pathbuffer */
410 Curl_safefree(data->state.pathbuffer);
411 data->state.path = NULL;
413 /* freed here just in case DONE wasn't called */
414 Curl_free_request_state(data);
416 /* Close down all open SSL info and sessions */
417 Curl_ssl_close_all(data);
418 Curl_safefree(data->state.first_host);
419 Curl_safefree(data->state.scratch);
420 Curl_ssl_free_certinfo(data);
422 if(data->change.referer_alloc) {
423 Curl_safefree(data->change.referer);
424 data->change.referer_alloc = FALSE;
426 data->change.referer = NULL;
428 if(data->change.url_alloc) {
429 Curl_safefree(data->change.url);
430 data->change.url_alloc = FALSE;
432 data->change.url = NULL;
434 Curl_safefree(data->state.headerbuff);
436 Curl_flush_cookies(data, 1);
438 Curl_digest_cleanup(data);
440 Curl_safefree(data->info.contenttype);
441 Curl_safefree(data->info.wouldredirect);
443 /* this destroys the channel and we cannot use it anymore after this */
444 Curl_resolver_cleanup(data->state.resolver);
446 Curl_convert_close(data);
448 /* No longer a dirty share, if it exists */
450 Curl_share_lock(data, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE);
451 data->share->dirty--;
452 Curl_share_unlock(data, CURL_LOCK_DATA_SHARE);
461 * Initialize the UserDefined fields within a SessionHandle.
462 * This may be safely called on a new or existing SessionHandle.
464 CURLcode Curl_init_userdefined(struct UserDefined *set)
466 CURLcode res = CURLE_OK;
468 set->out = stdout; /* default output to stdout */
469 set->in = stdin; /* default input from stdin */
470 set->err = stderr; /* default stderr to stderr */
472 /* use fwrite as default function to store output */
473 set->fwrite_func = (curl_write_callback)fwrite;
475 /* use fread as default function to read input */
476 set->fread_func = (curl_read_callback)fread;
477 set->is_fread_set = 0;
478 set->is_fwrite_set = 0;
480 set->seek_func = ZERO_NULL;
481 set->seek_client = ZERO_NULL;
483 /* conversion callbacks for non-ASCII hosts */
484 set->convfromnetwork = ZERO_NULL;
485 set->convtonetwork = ZERO_NULL;
486 set->convfromutf8 = ZERO_NULL;
488 set->infilesize = -1; /* we don't know any size */
489 set->postfieldsize = -1; /* unknown size */
490 set->maxredirs = -1; /* allow any amount by default */
492 set->httpreq = HTTPREQ_GET; /* Default HTTP request */
493 set->rtspreq = RTSPREQ_OPTIONS; /* Default RTSP request */
494 set->ftp_use_epsv = TRUE; /* FTP defaults to EPSV operations */
495 set->ftp_use_eprt = TRUE; /* FTP defaults to EPRT operations */
496 set->ftp_use_pret = FALSE; /* mainly useful for drftpd servers */
497 set->ftp_filemethod = FTPFILE_MULTICWD;
499 set->dns_cache_timeout = 60; /* Timeout every 60 seconds by default */
501 /* Set the default size of the SSL session ID cache */
502 set->ssl.max_ssl_sessions = 5;
504 set->proxyport = CURL_DEFAULT_PROXY_PORT; /* from url.h */
505 set->proxytype = CURLPROXY_HTTP; /* defaults to HTTP proxy */
506 set->httpauth = CURLAUTH_BASIC; /* defaults to basic */
507 set->proxyauth = CURLAUTH_BASIC; /* defaults to basic */
509 /* make libcurl quiet by default: */
510 set->hide_progress = TRUE; /* CURLOPT_NOPROGRESS changes these */
513 * libcurl 7.10 introduced SSL verification *by default*! This needs to be
514 * switched off unless wanted.
516 set->ssl.verifypeer = TRUE;
517 set->ssl.verifyhost = TRUE;
519 set->ssl.authtype = CURL_TLSAUTH_NONE;
521 set->ssh_auth_types = CURLSSH_AUTH_DEFAULT; /* defaults to any auth
523 set->ssl.sessionid = TRUE; /* session ID caching enabled by default */
525 set->new_file_perms = 0644; /* Default permissions */
526 set->new_directory_perms = 0755; /* Default permissions */
528 /* for the *protocols fields we don't use the CURLPROTO_ALL convenience
529 define since we internally only use the lower 16 bits for the passed
530 in bitmask to not conflict with the private bits */
531 set->allowed_protocols = CURLPROTO_ALL;
532 set->redir_protocols =
533 CURLPROTO_ALL & ~(CURLPROTO_FILE|CURLPROTO_SCP); /* not FILE or SCP */
535 #if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
537 * disallow unprotected protection negotiation NEC reference implementation
538 * seem not to follow rfc1961 section 4.3/4.4
540 set->socks5_gssapi_nec = FALSE;
541 /* set default gssapi service name */
542 res = setstropt(&set->str[STRING_SOCKS5_GSSAPI_SERVICE],
543 (char *) CURL_DEFAULT_SOCKS5_GSSAPI_SERVICE);
548 /* This is our preferred CA cert bundle/path since install time */
549 #if defined(CURL_CA_BUNDLE)
550 res = setstropt(&set->str[STRING_SSL_CAFILE], (char *) CURL_CA_BUNDLE);
551 #elif defined(CURL_CA_PATH)
552 res = setstropt(&set->str[STRING_SSL_CAPATH], (char *) CURL_CA_PATH);
555 set->wildcardmatch = FALSE;
556 set->chunk_bgn = ZERO_NULL;
557 set->chunk_end = ZERO_NULL;
559 /* tcp keepalives are disabled by default, but provide reasonable values for
560 * the interval and idle times.
562 set->tcp_keepalive = FALSE;
563 set->tcp_keepintvl = 60;
564 set->tcp_keepidle = 60;
572 * @param curl is a pointer to a sessionhandle pointer that gets set by this
577 CURLcode Curl_open(struct SessionHandle **curl)
579 CURLcode res = CURLE_OK;
580 struct SessionHandle *data;
583 /* Very simple start-up: alloc the struct, init it with zeroes and return */
584 data = calloc(1, sizeof(struct SessionHandle));
586 /* this is a very serious error */
587 DEBUGF(fprintf(stderr, "Error: calloc of SessionHandle failed\n"));
588 return CURLE_OUT_OF_MEMORY;
591 data->magic = CURLEASY_MAGIC_NUMBER;
593 status = Curl_resolver_init(&data->state.resolver);
595 DEBUGF(fprintf(stderr, "Error: resolver_init failed\n"));
600 /* We do some initial setup here, all those fields that can't be just 0 */
602 data->state.headerbuff = malloc(HEADERSIZE);
603 if(!data->state.headerbuff) {
604 DEBUGF(fprintf(stderr, "Error: malloc of headerbuff failed\n"));
605 res = CURLE_OUT_OF_MEMORY;
608 res = Curl_init_userdefined(&data->set);
610 data->state.headersize=HEADERSIZE;
612 Curl_convert_init(data);
614 /* most recent connection is not yet defined */
615 data->state.lastconnect = NULL;
617 data->progress.flags |= PGRS_HIDE;
618 data->state.current_speed = -1; /* init to negative == impossible */
620 data->wildcard.state = CURLWC_INIT;
621 data->wildcard.filelist = NULL;
622 data->set.fnmatch = ZERO_NULL;
623 data->set.maxconnects = DEFAULT_CONNCACHE_SIZE; /* for easy handles */
627 Curl_resolver_cleanup(data->state.resolver);
628 if(data->state.headerbuff)
629 free(data->state.headerbuff);
640 CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option,
644 CURLcode result = CURLE_OK;
646 #ifndef CURL_DISABLE_HTTP
651 case CURLOPT_DNS_CACHE_TIMEOUT:
652 data->set.dns_cache_timeout = va_arg(param, long);
654 case CURLOPT_DNS_USE_GLOBAL_CACHE:
655 /* remember we want this enabled */
656 arg = va_arg(param, long);
657 data->set.global_dns_cache = (0 != arg)?TRUE:FALSE;
659 case CURLOPT_SSL_CIPHER_LIST:
660 /* set a list of cipher we want to use in the SSL connection */
661 result = setstropt(&data->set.str[STRING_SSL_CIPHER_LIST],
662 va_arg(param, char *));
665 case CURLOPT_RANDOM_FILE:
667 * This is the path name to a file that contains random data to seed
668 * the random SSL stuff with. The file is only used for reading.
670 result = setstropt(&data->set.str[STRING_SSL_RANDOM_FILE],
671 va_arg(param, char *));
673 case CURLOPT_EGDSOCKET:
675 * The Entropy Gathering Daemon socket pathname
677 result = setstropt(&data->set.str[STRING_SSL_EGDSOCKET],
678 va_arg(param, char *));
680 case CURLOPT_MAXCONNECTS:
682 * Set the absolute number of maximum simultaneous alive connection that
683 * libcurl is allowed to have.
685 data->set.maxconnects = va_arg(param, long);
687 case CURLOPT_FORBID_REUSE:
689 * When this transfer is done, it must not be left to be reused by a
690 * subsequent transfer but shall be closed immediately.
692 data->set.reuse_forbid = (0 != va_arg(param, long))?TRUE:FALSE;
694 case CURLOPT_FRESH_CONNECT:
696 * This transfer shall not use a previously cached connection but
697 * should be made with a fresh new connect!
699 data->set.reuse_fresh = (0 != va_arg(param, long))?TRUE:FALSE;
701 case CURLOPT_VERBOSE:
703 * Verbose means infof() calls that give a lot of information about
704 * the connection and transfer procedures as well as internal choices.
706 data->set.verbose = (0 != va_arg(param, long))?TRUE:FALSE;
710 * Set to include the header in the general data output stream.
712 data->set.include_header = (0 != va_arg(param, long))?TRUE:FALSE;
714 case CURLOPT_NOPROGRESS:
716 * Shut off the internal supported progress meter
718 data->set.hide_progress = (0 != va_arg(param, long))?TRUE:FALSE;
719 if(data->set.hide_progress)
720 data->progress.flags |= PGRS_HIDE;
722 data->progress.flags &= ~PGRS_HIDE;
726 * Do not include the body part in the output data stream.
728 data->set.opt_no_body = (0 != va_arg(param, long))?TRUE:FALSE;
730 case CURLOPT_FAILONERROR:
732 * Don't output the >=300 error code HTML-page, but instead only
735 data->set.http_fail_on_error = (0 != va_arg(param, long))?TRUE:FALSE;
740 * We want to sent data to the remote host. If this is HTTP, that equals
741 * using the PUT request.
743 data->set.upload = (0 != va_arg(param, long))?TRUE:FALSE;
744 if(data->set.upload) {
745 /* If this is HTTP, PUT is what's needed to "upload" */
746 data->set.httpreq = HTTPREQ_PUT;
747 data->set.opt_no_body = FALSE; /* this is implied */
750 /* In HTTP, the opposite of upload is GET (unless NOBODY is true as
751 then this can be changed to HEAD later on) */
752 data->set.httpreq = HTTPREQ_GET;
754 case CURLOPT_FILETIME:
756 * Try to get the file time of the remote document. The time will
757 * later (possibly) become available using curl_easy_getinfo().
759 data->set.get_filetime = (0 != va_arg(param, long))?TRUE:FALSE;
761 case CURLOPT_FTP_CREATE_MISSING_DIRS:
763 * An FTP option that modifies an upload to create missing directories on
766 switch(va_arg(param, long)) {
768 data->set.ftp_create_missing_dirs = 0;
771 data->set.ftp_create_missing_dirs = 1;
774 data->set.ftp_create_missing_dirs = 2;
777 /* reserve other values for future use */
778 result = CURLE_UNKNOWN_OPTION;
782 case CURLOPT_SERVER_RESPONSE_TIMEOUT:
784 * Option that specifies how quickly an server response must be obtained
785 * before it is considered failure. For pingpong protocols.
787 data->set.server_response_timeout = va_arg( param , long ) * 1000;
789 case CURLOPT_TFTP_BLKSIZE:
791 * TFTP option that specifies the block size to use for data transmission
793 data->set.tftp_blksize = va_arg(param, long);
795 case CURLOPT_DIRLISTONLY:
797 * An option that changes the command to one that asks for a list
798 * only, no file info details.
800 data->set.ftp_list_only = (0 != va_arg(param, long))?TRUE:FALSE;
804 * We want to upload and append to an existing file.
806 data->set.ftp_append = (0 != va_arg(param, long))?TRUE:FALSE;
808 case CURLOPT_FTP_FILEMETHOD:
810 * How do access files over FTP.
812 data->set.ftp_filemethod = (curl_ftpfile)va_arg(param, long);
816 * Parse the $HOME/.netrc file
818 data->set.use_netrc = (enum CURL_NETRC_OPTION)va_arg(param, long);
820 case CURLOPT_NETRC_FILE:
822 * Use this file instead of the $HOME/.netrc file
824 result = setstropt(&data->set.str[STRING_NETRC_FILE],
825 va_arg(param, char *));
827 case CURLOPT_TRANSFERTEXT:
829 * This option was previously named 'FTPASCII'. Renamed to work with
830 * more protocols than merely FTP.
832 * Transfer using ASCII (instead of BINARY).
834 data->set.prefer_ascii = (0 != va_arg(param, long))?TRUE:FALSE;
836 case CURLOPT_TIMECONDITION:
838 * Set HTTP time condition. This must be one of the defines in the
839 * curl/curl.h header file.
841 data->set.timecondition = (curl_TimeCond)va_arg(param, long);
843 case CURLOPT_TIMEVALUE:
845 * This is the value to compare with the remote document with the
846 * method set with CURLOPT_TIMECONDITION
848 data->set.timevalue = (time_t)va_arg(param, long);
850 case CURLOPT_SSLVERSION:
852 * Set explicit SSL version to try to connect with, as some SSL
853 * implementations are lame.
855 data->set.ssl.version = va_arg(param, long);
858 #ifndef CURL_DISABLE_HTTP
859 case CURLOPT_AUTOREFERER:
861 * Switch on automatic referer that gets set if curl follows locations.
863 data->set.http_auto_referer = (0 != va_arg(param, long))?TRUE:FALSE;
866 case CURLOPT_ACCEPT_ENCODING:
868 * String to use at the value of Accept-Encoding header.
870 * If the encoding is set to "" we use an Accept-Encoding header that
871 * encompasses all the encodings we support.
872 * If the encoding is set to NULL we don't send an Accept-Encoding header
873 * and ignore an received Content-Encoding header.
876 argptr = va_arg(param, char *);
877 result = setstropt(&data->set.str[STRING_ENCODING],
878 (argptr && !*argptr)?
879 (char *) ALL_CONTENT_ENCODINGS: argptr);
882 case CURLOPT_TRANSFER_ENCODING:
883 data->set.http_transfer_encoding = (0 != va_arg(param, long))?TRUE:FALSE;
886 case CURLOPT_FOLLOWLOCATION:
888 * Follow Location: header hints on a HTTP-server.
890 data->set.http_follow_location = (0 != va_arg(param, long))?TRUE:FALSE;
893 case CURLOPT_UNRESTRICTED_AUTH:
895 * Send authentication (user+password) when following locations, even when
898 data->set.http_disable_hostname_check_before_authentication =
899 (0 != va_arg(param, long))?TRUE:FALSE;
902 case CURLOPT_MAXREDIRS:
904 * The maximum amount of hops you allow curl to follow Location:
905 * headers. This should mostly be used to detect never-ending loops.
907 data->set.maxredirs = va_arg(param, long);
910 case CURLOPT_POSTREDIR:
913 * Set the behaviour of POST when redirecting
914 * CURL_REDIR_GET_ALL - POST is changed to GET after 301 and 302
915 * CURL_REDIR_POST_301 - POST is kept as POST after 301
916 * CURL_REDIR_POST_302 - POST is kept as POST after 302
917 * CURL_REDIR_POST_303 - POST is kept as POST after 303
918 * CURL_REDIR_POST_ALL - POST is kept as POST after 301, 302 and 303
919 * other - POST is kept as POST after 301 and 302
921 int postRedir = curlx_sltosi(va_arg(param, long));
922 data->set.keep_post = postRedir & CURL_REDIR_POST_ALL;
927 /* Does this option serve a purpose anymore? Yes it does, when
928 CURLOPT_POSTFIELDS isn't used and the POST data is read off the
930 if(va_arg(param, long)) {
931 data->set.httpreq = HTTPREQ_POST;
932 data->set.opt_no_body = FALSE; /* this is implied */
935 data->set.httpreq = HTTPREQ_GET;
938 case CURLOPT_COPYPOSTFIELDS:
940 * A string with POST data. Makes curl HTTP POST. Even if it is NULL.
941 * If needed, CURLOPT_POSTFIELDSIZE must have been set prior to
942 * CURLOPT_COPYPOSTFIELDS and not altered later.
944 argptr = va_arg(param, char *);
946 if(!argptr || data->set.postfieldsize == -1)
947 result = setstropt(&data->set.str[STRING_COPYPOSTFIELDS], argptr);
950 * Check that requested length does not overflow the size_t type.
953 if((data->set.postfieldsize < 0) ||
954 ((sizeof(curl_off_t) != sizeof(size_t)) &&
955 (data->set.postfieldsize > (curl_off_t)((size_t)-1))))
956 result = CURLE_OUT_OF_MEMORY;
960 (void) setstropt(&data->set.str[STRING_COPYPOSTFIELDS], NULL);
962 /* Allocate even when size == 0. This satisfies the need of possible
963 later address compare to detect the COPYPOSTFIELDS mode, and
964 to mark that postfields is used rather than read function or
967 p = malloc((size_t)(data->set.postfieldsize?
968 data->set.postfieldsize:1));
971 result = CURLE_OUT_OF_MEMORY;
973 if(data->set.postfieldsize)
974 memcpy(p, argptr, (size_t)data->set.postfieldsize);
976 data->set.str[STRING_COPYPOSTFIELDS] = p;
981 data->set.postfields = data->set.str[STRING_COPYPOSTFIELDS];
982 data->set.httpreq = HTTPREQ_POST;
985 case CURLOPT_POSTFIELDS:
987 * Like above, but use static data instead of copying it.
989 data->set.postfields = va_arg(param, void *);
990 /* Release old copied data. */
991 (void) setstropt(&data->set.str[STRING_COPYPOSTFIELDS], NULL);
992 data->set.httpreq = HTTPREQ_POST;
995 case CURLOPT_POSTFIELDSIZE:
997 * The size of the POSTFIELD data to prevent libcurl to do strlen() to
998 * figure it out. Enables binary posts.
1000 bigsize = va_arg(param, long);
1002 if(data->set.postfieldsize < bigsize &&
1003 data->set.postfields == data->set.str[STRING_COPYPOSTFIELDS]) {
1004 /* Previous CURLOPT_COPYPOSTFIELDS is no longer valid. */
1005 (void) setstropt(&data->set.str[STRING_COPYPOSTFIELDS], NULL);
1006 data->set.postfields = NULL;
1009 data->set.postfieldsize = bigsize;
1012 case CURLOPT_POSTFIELDSIZE_LARGE:
1014 * The size of the POSTFIELD data to prevent libcurl to do strlen() to
1015 * figure it out. Enables binary posts.
1017 bigsize = va_arg(param, curl_off_t);
1019 if(data->set.postfieldsize < bigsize &&
1020 data->set.postfields == data->set.str[STRING_COPYPOSTFIELDS]) {
1021 /* Previous CURLOPT_COPYPOSTFIELDS is no longer valid. */
1022 (void) setstropt(&data->set.str[STRING_COPYPOSTFIELDS], NULL);
1023 data->set.postfields = NULL;
1026 data->set.postfieldsize = bigsize;
1029 case CURLOPT_HTTPPOST:
1031 * Set to make us do HTTP POST
1033 data->set.httppost = va_arg(param, struct curl_httppost *);
1034 data->set.httpreq = HTTPREQ_POST_FORM;
1035 data->set.opt_no_body = FALSE; /* this is implied */
1038 case CURLOPT_REFERER:
1040 * String to set in the HTTP Referer: field.
1042 if(data->change.referer_alloc) {
1043 Curl_safefree(data->change.referer);
1044 data->change.referer_alloc = FALSE;
1046 result = setstropt(&data->set.str[STRING_SET_REFERER],
1047 va_arg(param, char *));
1048 data->change.referer = data->set.str[STRING_SET_REFERER];
1051 case CURLOPT_USERAGENT:
1053 * String to use in the HTTP User-Agent field
1055 result = setstropt(&data->set.str[STRING_USERAGENT],
1056 va_arg(param, char *));
1059 case CURLOPT_HTTPHEADER:
1061 * Set a list with HTTP headers to use (or replace internals with)
1063 data->set.headers = va_arg(param, struct curl_slist *);
1066 case CURLOPT_HTTP200ALIASES:
1068 * Set a list of aliases for HTTP 200 in response header
1070 data->set.http200aliases = va_arg(param, struct curl_slist *);
1073 #if !defined(CURL_DISABLE_COOKIES)
1074 case CURLOPT_COOKIE:
1076 * Cookie string to send to the remote server in the request.
1078 result = setstropt(&data->set.str[STRING_COOKIE],
1079 va_arg(param, char *));
1082 case CURLOPT_COOKIEFILE:
1084 * Set cookie file to read and parse. Can be used multiple times.
1086 argptr = (char *)va_arg(param, void *);
1088 struct curl_slist *cl;
1089 /* append the cookie file name to the list of file names, and deal with
1091 cl = curl_slist_append(data->change.cookielist, argptr);
1093 curl_slist_free_all(data->change.cookielist);
1094 data->change.cookielist = NULL;
1095 return CURLE_OUT_OF_MEMORY;
1097 data->change.cookielist = cl; /* store the list for later use */
1101 case CURLOPT_COOKIEJAR:
1103 * Set cookie file name to dump all cookies to when we're done.
1105 result = setstropt(&data->set.str[STRING_COOKIEJAR],
1106 va_arg(param, char *));
1109 * Activate the cookie parser. This may or may not already
1112 data->cookies = Curl_cookie_init(data, NULL, data->cookies,
1113 data->set.cookiesession);
1116 case CURLOPT_COOKIESESSION:
1118 * Set this option to TRUE to start a new "cookie session". It will
1119 * prevent the forthcoming read-cookies-from-file actions to accept
1120 * cookies that are marked as being session cookies, as they belong to a
1123 * In the original Netscape cookie spec, "session cookies" are cookies
1124 * with no expire date set. RFC2109 describes the same action if no
1125 * 'Max-Age' is set and RFC2965 includes the RFC2109 description and adds
1126 * a 'Discard' action that can enforce the discard even for cookies that
1129 * We run mostly with the original cookie spec, as hardly anyone implements
1132 data->set.cookiesession = (0 != va_arg(param, long))?TRUE:FALSE;
1135 case CURLOPT_COOKIELIST:
1136 argptr = va_arg(param, char *);
1141 Curl_share_lock(data, CURL_LOCK_DATA_COOKIE, CURL_LOCK_ACCESS_SINGLE);
1143 if(Curl_raw_equal(argptr, "ALL")) {
1144 /* clear all cookies */
1145 Curl_cookie_clearall(data->cookies);
1147 else if(Curl_raw_equal(argptr, "SESS")) {
1148 /* clear session cookies */
1149 Curl_cookie_clearsess(data->cookies);
1151 else if(Curl_raw_equal(argptr, "FLUSH")) {
1152 /* flush cookies to file */
1153 Curl_flush_cookies(data, 0);
1157 /* if cookie engine was not running, activate it */
1158 data->cookies = Curl_cookie_init(data, NULL, NULL, TRUE);
1160 argptr = strdup(argptr);
1162 result = CURLE_OUT_OF_MEMORY;
1166 if(checkprefix("Set-Cookie:", argptr))
1167 /* HTTP Header format line */
1168 Curl_cookie_add(data, data->cookies, TRUE, argptr + 11, NULL, NULL);
1171 /* Netscape format line */
1172 Curl_cookie_add(data, data->cookies, FALSE, argptr, NULL, NULL);
1177 Curl_share_unlock(data, CURL_LOCK_DATA_COOKIE);
1180 #endif /* CURL_DISABLE_COOKIES */
1182 case CURLOPT_HTTPGET:
1184 * Set to force us do HTTP GET
1186 if(va_arg(param, long)) {
1187 data->set.httpreq = HTTPREQ_GET;
1188 data->set.upload = FALSE; /* switch off upload */
1189 data->set.opt_no_body = FALSE; /* this is implied */
1193 case CURLOPT_HTTP_VERSION:
1195 * This sets a requested HTTP version to be used. The value is one of
1196 * the listed enums in curl/curl.h.
1198 arg = va_arg(param, long);
1200 if(arg == CURL_HTTP_VERSION_2_0)
1201 return CURLE_UNSUPPORTED_PROTOCOL;
1203 data->set.httpversion = arg;
1206 case CURLOPT_HTTPAUTH:
1208 * Set HTTP Authentication type BITMASK.
1213 unsigned long auth = va_arg(param, unsigned long);
1215 if(auth == CURLAUTH_NONE) {
1216 data->set.httpauth = auth;
1220 /* the DIGEST_IE bit is only used to set a special marker, for all the
1221 rest we need to handle it as normal DIGEST */
1222 data->state.authhost.iestyle = (auth & CURLAUTH_DIGEST_IE)?TRUE:FALSE;
1224 if(auth & CURLAUTH_DIGEST_IE) {
1225 auth |= CURLAUTH_DIGEST; /* set standard digest bit */
1226 auth &= ~CURLAUTH_DIGEST_IE; /* unset ie digest bit */
1229 /* switch off bits we can't support */
1231 auth &= ~CURLAUTH_NTLM; /* no NTLM support */
1232 auth &= ~CURLAUTH_NTLM_WB; /* no NTLM_WB support */
1233 #elif !defined(NTLM_WB_ENABLED)
1234 auth &= ~CURLAUTH_NTLM_WB; /* no NTLM_WB support */
1236 #ifndef USE_HTTP_NEGOTIATE
1237 auth &= ~CURLAUTH_GSSNEGOTIATE; /* no GSS-Negotiate without GSSAPI or
1241 /* check if any auth bit lower than CURLAUTH_ONLY is still set */
1244 while(bitcheck < 31) {
1245 if(auth & (1UL << bitcheck++)) {
1251 return CURLE_NOT_BUILT_IN; /* no supported types left! */
1253 data->set.httpauth = auth;
1257 #endif /* CURL_DISABLE_HTTP */
1259 case CURLOPT_CUSTOMREQUEST:
1261 * Set a custom string to use as request
1263 result = setstropt(&data->set.str[STRING_CUSTOMREQUEST],
1264 va_arg(param, char *));
1267 data->set.httpreq = HTTPREQ_CUSTOM;
1268 here, we continue as if we were using the already set type
1269 and this just changes the actual request keyword */
1272 #ifndef CURL_DISABLE_PROXY
1273 case CURLOPT_HTTPPROXYTUNNEL:
1275 * Tunnel operations through the proxy instead of normal proxy use
1277 data->set.tunnel_thru_httpproxy = (0 != va_arg(param, long))?TRUE:FALSE;
1280 case CURLOPT_PROXYPORT:
1282 * Explicitly set HTTP proxy port number.
1284 data->set.proxyport = va_arg(param, long);
1287 case CURLOPT_PROXYAUTH:
1289 * Set HTTP Authentication type BITMASK.
1294 unsigned long auth = va_arg(param, unsigned long);
1296 if(auth == CURLAUTH_NONE) {
1297 data->set.proxyauth = auth;
1301 /* the DIGEST_IE bit is only used to set a special marker, for all the
1302 rest we need to handle it as normal DIGEST */
1303 data->state.authproxy.iestyle = (auth & CURLAUTH_DIGEST_IE)?TRUE:FALSE;
1305 if(auth & CURLAUTH_DIGEST_IE) {
1306 auth |= CURLAUTH_DIGEST; /* set standard digest bit */
1307 auth &= ~CURLAUTH_DIGEST_IE; /* unset ie digest bit */
1309 /* switch off bits we can't support */
1311 auth &= ~CURLAUTH_NTLM; /* no NTLM support */
1312 auth &= ~CURLAUTH_NTLM_WB; /* no NTLM_WB support */
1313 #elif !defined(NTLM_WB_ENABLED)
1314 auth &= ~CURLAUTH_NTLM_WB; /* no NTLM_WB support */
1316 #ifndef USE_HTTP_NEGOTIATE
1317 auth &= ~CURLAUTH_GSSNEGOTIATE; /* no GSS-Negotiate without GSSAPI or
1321 /* check if any auth bit lower than CURLAUTH_ONLY is still set */
1324 while(bitcheck < 31) {
1325 if(auth & (1UL << bitcheck++)) {
1331 return CURLE_NOT_BUILT_IN; /* no supported types left! */
1333 data->set.proxyauth = auth;
1339 * Set proxy server:port to use as HTTP proxy.
1341 * If the proxy is set to "" we explicitly say that we don't want to use a
1342 * proxy (even though there might be environment variables saying so).
1344 * Setting it to NULL, means no proxy but allows the environment variables
1347 result = setstropt(&data->set.str[STRING_PROXY],
1348 va_arg(param, char *));
1351 case CURLOPT_PROXYTYPE:
1353 * Set proxy type. HTTP/HTTP_1_0/SOCKS4/SOCKS4a/SOCKS5/SOCKS5_HOSTNAME
1355 data->set.proxytype = (curl_proxytype)va_arg(param, long);
1358 case CURLOPT_PROXY_TRANSFER_MODE:
1360 * set transfer mode (;type=<a|i>) when doing FTP via an HTTP proxy
1362 switch (va_arg(param, long)) {
1364 data->set.proxy_transfer_mode = FALSE;
1367 data->set.proxy_transfer_mode = TRUE;
1370 /* reserve other values for future use */
1371 result = CURLE_UNKNOWN_OPTION;
1375 #endif /* CURL_DISABLE_PROXY */
1377 #if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
1378 case CURLOPT_SOCKS5_GSSAPI_SERVICE:
1380 * Set gssapi service name
1382 result = setstropt(&data->set.str[STRING_SOCKS5_GSSAPI_SERVICE],
1383 va_arg(param, char *));
1386 case CURLOPT_SOCKS5_GSSAPI_NEC:
1388 * set flag for nec socks5 support
1390 data->set.socks5_gssapi_nec = (0 != va_arg(param, long))?TRUE:FALSE;
1394 case CURLOPT_WRITEHEADER:
1396 * Custom pointer to pass the header write callback function
1398 data->set.writeheader = (void *)va_arg(param, void *);
1400 case CURLOPT_ERRORBUFFER:
1402 * Error buffer provided by the caller to get the human readable
1405 data->set.errorbuffer = va_arg(param, char *);
1409 * FILE pointer to write to. Or possibly
1410 * used as argument to the write callback.
1412 data->set.out = va_arg(param, void *);
1414 case CURLOPT_FTPPORT:
1416 * Use FTP PORT, this also specifies which IP address to use
1418 result = setstropt(&data->set.str[STRING_FTPPORT],
1419 va_arg(param, char *));
1420 data->set.ftp_use_port = (NULL != data->set.str[STRING_FTPPORT]) ?
1424 case CURLOPT_FTP_USE_EPRT:
1425 data->set.ftp_use_eprt = (0 != va_arg(param, long))?TRUE:FALSE;
1428 case CURLOPT_FTP_USE_EPSV:
1429 data->set.ftp_use_epsv = (0 != va_arg(param, long))?TRUE:FALSE;
1432 case CURLOPT_FTP_USE_PRET:
1433 data->set.ftp_use_pret = (0 != va_arg(param, long))?TRUE:FALSE;
1436 case CURLOPT_FTP_SSL_CCC:
1437 data->set.ftp_ccc = (curl_ftpccc)va_arg(param, long);
1440 case CURLOPT_FTP_SKIP_PASV_IP:
1442 * Enable or disable FTP_SKIP_PASV_IP, which will disable/enable the
1443 * bypass of the IP address in PASV responses.
1445 data->set.ftp_skip_ip = (0 != va_arg(param, long))?TRUE:FALSE;
1448 case CURLOPT_INFILE:
1450 * FILE pointer to read the file to be uploaded from. Or possibly
1451 * used as argument to the read callback.
1453 data->set.in = va_arg(param, void *);
1455 case CURLOPT_INFILESIZE:
1457 * If known, this should inform curl about the file size of the
1458 * to-be-uploaded file.
1460 data->set.infilesize = va_arg(param, long);
1462 case CURLOPT_INFILESIZE_LARGE:
1464 * If known, this should inform curl about the file size of the
1465 * to-be-uploaded file.
1467 data->set.infilesize = va_arg(param, curl_off_t);
1469 case CURLOPT_LOW_SPEED_LIMIT:
1471 * The low speed limit that if transfers are below this for
1472 * CURLOPT_LOW_SPEED_TIME, the transfer is aborted.
1474 data->set.low_speed_limit=va_arg(param, long);
1476 case CURLOPT_MAX_SEND_SPEED_LARGE:
1478 * When transfer uploads are faster then CURLOPT_MAX_SEND_SPEED_LARGE
1479 * bytes per second the transfer is throttled..
1481 data->set.max_send_speed=va_arg(param, curl_off_t);
1483 case CURLOPT_MAX_RECV_SPEED_LARGE:
1485 * When receiving data faster than CURLOPT_MAX_RECV_SPEED_LARGE bytes per
1486 * second the transfer is throttled..
1488 data->set.max_recv_speed=va_arg(param, curl_off_t);
1490 case CURLOPT_LOW_SPEED_TIME:
1492 * The low speed time that if transfers are below the set
1493 * CURLOPT_LOW_SPEED_LIMIT during this time, the transfer is aborted.
1495 data->set.low_speed_time=va_arg(param, long);
1501 if(data->change.url_alloc) {
1502 /* the already set URL is allocated, free it first! */
1503 Curl_safefree(data->change.url);
1504 data->change.url_alloc = FALSE;
1506 result = setstropt(&data->set.str[STRING_SET_URL],
1507 va_arg(param, char *));
1508 data->change.url = data->set.str[STRING_SET_URL];
1512 * The port number to use when getting the URL
1514 data->set.use_port = va_arg(param, long);
1516 case CURLOPT_TIMEOUT:
1518 * The maximum time you allow curl to use for a single transfer
1521 data->set.timeout = va_arg(param, long) * 1000L;
1524 case CURLOPT_TIMEOUT_MS:
1525 data->set.timeout = va_arg(param, long);
1528 case CURLOPT_CONNECTTIMEOUT:
1530 * The maximum time you allow curl to use to connect.
1532 data->set.connecttimeout = va_arg(param, long) * 1000L;
1535 case CURLOPT_CONNECTTIMEOUT_MS:
1536 data->set.connecttimeout = va_arg(param, long);
1539 case CURLOPT_ACCEPTTIMEOUT_MS:
1541 * The maximum time you allow curl to wait for server connect
1543 data->set.accepttimeout = va_arg(param, long);
1546 case CURLOPT_USERPWD:
1548 * user:password to use in the operation
1550 result = setstropt_userpwd(va_arg(param, char *),
1551 &data->set.str[STRING_USERNAME],
1552 &data->set.str[STRING_PASSWORD]);
1555 case CURLOPT_USERNAME:
1557 * authentication user name to use in the operation
1559 result = setstropt(&data->set.str[STRING_USERNAME],
1560 va_arg(param, char *));
1563 case CURLOPT_PASSWORD:
1565 * authentication password to use in the operation
1567 result = setstropt(&data->set.str[STRING_PASSWORD],
1568 va_arg(param, char *));
1571 case CURLOPT_LOGIN_OPTIONS:
1573 * authentication options to use in the operation
1575 result = setstropt(&data->set.str[STRING_OPTIONS],
1576 va_arg(param, char *));
1579 case CURLOPT_XOAUTH2_BEARER:
1581 * XOAUTH2 bearer token to use in the operation
1583 result = setstropt(&data->set.str[STRING_BEARER],
1584 va_arg(param, char *));
1587 case CURLOPT_POSTQUOTE:
1589 * List of RAW FTP commands to use after a transfer
1591 data->set.postquote = va_arg(param, struct curl_slist *);
1593 case CURLOPT_PREQUOTE:
1595 * List of RAW FTP commands to use prior to RETR (Wesley Laxton)
1597 data->set.prequote = va_arg(param, struct curl_slist *);
1601 * List of RAW FTP commands to use before a transfer
1603 data->set.quote = va_arg(param, struct curl_slist *);
1605 case CURLOPT_RESOLVE:
1607 * List of NAME:[address] names to populate the DNS cache with
1608 * Prefix the NAME with dash (-) to _remove_ the name from the cache.
1610 * Names added with this API will remain in the cache until explicitly
1611 * removed or the handle is cleaned up.
1613 * This API can remove any name from the DNS cache, but only entries
1614 * that aren't actually in use right now will be pruned immediately.
1616 data->set.resolve = va_arg(param, struct curl_slist *);
1617 data->change.resolve = data->set.resolve;
1619 case CURLOPT_PROGRESSFUNCTION:
1621 * Progress callback function
1623 data->set.fprogress = va_arg(param, curl_progress_callback);
1624 if(data->set.fprogress)
1625 data->progress.callback = TRUE; /* no longer internal */
1627 data->progress.callback = FALSE; /* NULL enforces internal */
1630 case CURLOPT_XFERINFOFUNCTION:
1632 * Transfer info callback function
1634 data->set.fxferinfo = va_arg(param, curl_xferinfo_callback);
1635 if(data->set.fxferinfo)
1636 data->progress.callback = TRUE; /* no longer internal */
1638 data->progress.callback = FALSE; /* NULL enforces internal */
1642 case CURLOPT_PROGRESSDATA:
1644 * Custom client data to pass to the progress callback
1646 data->set.progress_client = va_arg(param, void *);
1649 #ifndef CURL_DISABLE_PROXY
1650 case CURLOPT_PROXYUSERPWD:
1652 * user:password needed to use the proxy
1654 result = setstropt_userpwd(va_arg(param, char *),
1655 &data->set.str[STRING_PROXYUSERNAME],
1656 &data->set.str[STRING_PROXYPASSWORD]);
1658 case CURLOPT_PROXYUSERNAME:
1660 * authentication user name to use in the operation
1662 result = setstropt(&data->set.str[STRING_PROXYUSERNAME],
1663 va_arg(param, char *));
1665 case CURLOPT_PROXYPASSWORD:
1667 * authentication password to use in the operation
1669 result = setstropt(&data->set.str[STRING_PROXYPASSWORD],
1670 va_arg(param, char *));
1672 case CURLOPT_NOPROXY:
1674 * proxy exception list
1676 result = setstropt(&data->set.str[STRING_NOPROXY],
1677 va_arg(param, char *));
1683 * What range of the file you want to transfer
1685 result = setstropt(&data->set.str[STRING_SET_RANGE],
1686 va_arg(param, char *));
1688 case CURLOPT_RESUME_FROM:
1690 * Resume transfer at the give file position
1692 data->set.set_resume_from = va_arg(param, long);
1694 case CURLOPT_RESUME_FROM_LARGE:
1696 * Resume transfer at the give file position
1698 data->set.set_resume_from = va_arg(param, curl_off_t);
1700 case CURLOPT_DEBUGFUNCTION:
1702 * stderr write callback.
1704 data->set.fdebug = va_arg(param, curl_debug_callback);
1706 * if the callback provided is NULL, it'll use the default callback
1709 case CURLOPT_DEBUGDATA:
1711 * Set to a void * that should receive all error writes. This
1712 * defaults to CURLOPT_STDERR for normal operations.
1714 data->set.debugdata = va_arg(param, void *);
1716 case CURLOPT_STDERR:
1718 * Set to a FILE * that should receive all error writes. This
1719 * defaults to stderr for normal operations.
1721 data->set.err = va_arg(param, FILE *);
1723 data->set.err = stderr;
1725 case CURLOPT_HEADERFUNCTION:
1727 * Set header write callback
1729 data->set.fwrite_header = va_arg(param, curl_write_callback);
1731 case CURLOPT_WRITEFUNCTION:
1733 * Set data write callback
1735 data->set.fwrite_func = va_arg(param, curl_write_callback);
1736 if(!data->set.fwrite_func) {
1737 data->set.is_fwrite_set = 0;
1738 /* When set to NULL, reset to our internal default function */
1739 data->set.fwrite_func = (curl_write_callback)fwrite;
1742 data->set.is_fwrite_set = 1;
1744 case CURLOPT_READFUNCTION:
1746 * Read data callback
1748 data->set.fread_func = va_arg(param, curl_read_callback);
1749 if(!data->set.fread_func) {
1750 data->set.is_fread_set = 0;
1751 /* When set to NULL, reset to our internal default function */
1752 data->set.fread_func = (curl_read_callback)fread;
1755 data->set.is_fread_set = 1;
1757 case CURLOPT_SEEKFUNCTION:
1759 * Seek callback. Might be NULL.
1761 data->set.seek_func = va_arg(param, curl_seek_callback);
1763 case CURLOPT_SEEKDATA:
1765 * Seek control callback. Might be NULL.
1767 data->set.seek_client = va_arg(param, void *);
1769 case CURLOPT_CONV_FROM_NETWORK_FUNCTION:
1771 * "Convert from network encoding" callback
1773 data->set.convfromnetwork = va_arg(param, curl_conv_callback);
1775 case CURLOPT_CONV_TO_NETWORK_FUNCTION:
1777 * "Convert to network encoding" callback
1779 data->set.convtonetwork = va_arg(param, curl_conv_callback);
1781 case CURLOPT_CONV_FROM_UTF8_FUNCTION:
1783 * "Convert from UTF-8 encoding" callback
1785 data->set.convfromutf8 = va_arg(param, curl_conv_callback);
1787 case CURLOPT_IOCTLFUNCTION:
1789 * I/O control callback. Might be NULL.
1791 data->set.ioctl_func = va_arg(param, curl_ioctl_callback);
1793 case CURLOPT_IOCTLDATA:
1795 * I/O control data pointer. Might be NULL.
1797 data->set.ioctl_client = va_arg(param, void *);
1799 case CURLOPT_SSLCERT:
1801 * String that holds file name of the SSL certificate to use
1803 result = setstropt(&data->set.str[STRING_CERT],
1804 va_arg(param, char *));
1806 case CURLOPT_SSLCERTTYPE:
1808 * String that holds file type of the SSL certificate to use
1810 result = setstropt(&data->set.str[STRING_CERT_TYPE],
1811 va_arg(param, char *));
1813 case CURLOPT_SSLKEY:
1815 * String that holds file name of the SSL key to use
1817 result = setstropt(&data->set.str[STRING_KEY],
1818 va_arg(param, char *));
1820 case CURLOPT_SSLKEYTYPE:
1822 * String that holds file type of the SSL key to use
1824 result = setstropt(&data->set.str[STRING_KEY_TYPE],
1825 va_arg(param, char *));
1827 case CURLOPT_KEYPASSWD:
1829 * String that holds the SSL or SSH private key password.
1831 result = setstropt(&data->set.str[STRING_KEY_PASSWD],
1832 va_arg(param, char *));
1834 case CURLOPT_SSLENGINE:
1836 * String that holds the SSL crypto engine.
1838 argptr = va_arg(param, char *);
1839 if(argptr && argptr[0])
1840 result = Curl_ssl_set_engine(data, argptr);
1843 case CURLOPT_SSLENGINE_DEFAULT:
1845 * flag to set engine as default.
1847 result = Curl_ssl_set_engine_default(data);
1851 * Kludgy option to enable CRLF conversions. Subject for removal.
1853 data->set.crlf = (0 != va_arg(param, long))?TRUE:FALSE;
1856 case CURLOPT_INTERFACE:
1858 * Set what interface or address/hostname to bind the socket to when
1859 * performing an operation and thus what from-IP your connection will use.
1861 result = setstropt(&data->set.str[STRING_DEVICE],
1862 va_arg(param, char *));
1864 case CURLOPT_LOCALPORT:
1866 * Set what local port to bind the socket to when performing an operation.
1868 data->set.localport = curlx_sltous(va_arg(param, long));
1870 case CURLOPT_LOCALPORTRANGE:
1872 * Set number of local ports to try, starting with CURLOPT_LOCALPORT.
1874 data->set.localportrange = curlx_sltosi(va_arg(param, long));
1876 case CURLOPT_KRBLEVEL:
1878 * A string that defines the kerberos security level.
1880 result = setstropt(&data->set.str[STRING_KRB_LEVEL],
1881 va_arg(param, char *));
1882 data->set.krb = (NULL != data->set.str[STRING_KRB_LEVEL])?TRUE:FALSE;
1884 case CURLOPT_GSSAPI_DELEGATION:
1886 * GSSAPI credential delegation
1888 data->set.gssapi_delegation = va_arg(param, long);
1890 case CURLOPT_SSL_VERIFYPEER:
1892 * Enable peer SSL verifying.
1894 data->set.ssl.verifypeer = (0 != va_arg(param, long))?TRUE:FALSE;
1896 case CURLOPT_SSL_VERIFYHOST:
1898 * Enable verification of the host name in the peer certificate
1900 arg = va_arg(param, long);
1902 /* Obviously people are not reading documentation and too many thought
1903 this argument took a boolean when it wasn't and misused it. We thus ban
1904 1 as a sensible input and we warn about its use. Then we only have the
1905 2 action internally stored as TRUE. */
1908 failf(data, "CURLOPT_SSL_VERIFYHOST no longer supports 1 as value!");
1909 return CURLE_BAD_FUNCTION_ARGUMENT;
1912 data->set.ssl.verifyhost = (0 != arg)?TRUE:FALSE;
1915 /* since these two options are only possible to use on an OpenSSL-
1916 powered libcurl we #ifdef them on this condition so that libcurls
1917 built against other SSL libs will return a proper error when trying
1918 to set this option! */
1919 case CURLOPT_SSL_CTX_FUNCTION:
1921 * Set a SSL_CTX callback
1923 data->set.ssl.fsslctx = va_arg(param, curl_ssl_ctx_callback);
1925 case CURLOPT_SSL_CTX_DATA:
1927 * Set a SSL_CTX callback parameter pointer
1929 data->set.ssl.fsslctxp = va_arg(param, void *);
1932 #if defined(USE_SSLEAY) || defined(USE_QSOSSL) || defined(USE_GSKIT) || \
1934 case CURLOPT_CERTINFO:
1935 data->set.ssl.certinfo = (0 != va_arg(param, long))?TRUE:FALSE;
1938 case CURLOPT_CAINFO:
1940 * Set CA info for SSL connection. Specify file name of the CA certificate
1942 result = setstropt(&data->set.str[STRING_SSL_CAFILE],
1943 va_arg(param, char *));
1945 case CURLOPT_CAPATH:
1947 * Set CA path info for SSL connection. Specify directory name of the CA
1948 * certificates which have been prepared using openssl c_rehash utility.
1950 /* This does not work on windows. */
1951 result = setstropt(&data->set.str[STRING_SSL_CAPATH],
1952 va_arg(param, char *));
1954 case CURLOPT_CRLFILE:
1956 * Set CRL file info for SSL connection. Specify file name of the CRL
1957 * to check certificates revocation
1959 result = setstropt(&data->set.str[STRING_SSL_CRLFILE],
1960 va_arg(param, char *));
1962 case CURLOPT_ISSUERCERT:
1964 * Set Issuer certificate file
1965 * to check certificates issuer
1967 result = setstropt(&data->set.str[STRING_SSL_ISSUERCERT],
1968 va_arg(param, char *));
1970 case CURLOPT_TELNETOPTIONS:
1972 * Set a linked list of telnet options
1974 data->set.telnet_options = va_arg(param, struct curl_slist *);
1977 case CURLOPT_BUFFERSIZE:
1979 * The application kindly asks for a differently sized receive buffer.
1980 * If it seems reasonable, we'll use it.
1982 data->set.buffer_size = va_arg(param, long);
1984 if((data->set.buffer_size> (BUFSIZE -1 )) ||
1985 (data->set.buffer_size < 1))
1986 data->set.buffer_size = 0; /* huge internal default */
1990 case CURLOPT_NOSIGNAL:
1992 * The application asks not to set any signal() or alarm() handlers,
1993 * even when using a timeout.
1995 data->set.no_signal = (0 != va_arg(param, long))?TRUE:FALSE;
2000 struct Curl_share *set;
2001 set = va_arg(param, struct Curl_share *);
2003 /* disconnect from old share, if any */
2005 Curl_share_lock(data, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE);
2007 if(data->dns.hostcachetype == HCACHE_SHARED) {
2008 data->dns.hostcache = NULL;
2009 data->dns.hostcachetype = HCACHE_NONE;
2012 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
2013 if(data->share->cookies == data->cookies)
2014 data->cookies = NULL;
2017 if(data->share->sslsession == data->state.session)
2018 data->state.session = NULL;
2020 data->share->dirty--;
2022 Curl_share_unlock(data, CURL_LOCK_DATA_SHARE);
2026 /* use new share if it set */
2030 Curl_share_lock(data, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE);
2032 data->share->dirty++;
2034 if(data->share->hostcache) {
2035 /* use shared host cache */
2036 data->dns.hostcache = data->share->hostcache;
2037 data->dns.hostcachetype = HCACHE_SHARED;
2039 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
2040 if(data->share->cookies) {
2041 /* use shared cookie list, first free own one if any */
2043 Curl_cookie_cleanup(data->cookies);
2044 /* enable cookies since we now use a share that uses cookies! */
2045 data->cookies = data->share->cookies;
2047 #endif /* CURL_DISABLE_HTTP */
2048 if(data->share->sslsession) {
2049 data->set.ssl.max_ssl_sessions = data->share->max_ssl_sessions;
2050 data->state.session = data->share->sslsession;
2052 Curl_share_unlock(data, CURL_LOCK_DATA_SHARE);
2055 /* check for host cache not needed,
2056 * it will be done by curl_easy_perform */
2060 case CURLOPT_PRIVATE:
2062 * Set private data pointer.
2064 data->set.private_data = va_arg(param, void *);
2067 case CURLOPT_MAXFILESIZE:
2069 * Set the maximum size of a file to download.
2071 data->set.max_filesize = va_arg(param, long);
2075 case CURLOPT_USE_SSL:
2077 * Make transfers attempt to use SSL/TLS.
2079 data->set.use_ssl = (curl_usessl)va_arg(param, long);
2082 case CURLOPT_SSL_OPTIONS:
2083 arg = va_arg(param, long);
2084 data->set.ssl_enable_beast = arg&CURLSSLOPT_ALLOW_BEAST?TRUE:FALSE;
2088 case CURLOPT_FTPSSLAUTH:
2090 * Set a specific auth for FTP-SSL transfers.
2092 data->set.ftpsslauth = (curl_ftpauth)va_arg(param, long);
2095 case CURLOPT_IPRESOLVE:
2096 data->set.ipver = va_arg(param, long);
2099 case CURLOPT_MAXFILESIZE_LARGE:
2101 * Set the maximum size of a file to download.
2103 data->set.max_filesize = va_arg(param, curl_off_t);
2106 case CURLOPT_TCP_NODELAY:
2108 * Enable or disable TCP_NODELAY, which will disable/enable the Nagle
2111 data->set.tcp_nodelay = (0 != va_arg(param, long))?TRUE:FALSE;
2114 case CURLOPT_FTP_ACCOUNT:
2115 result = setstropt(&data->set.str[STRING_FTP_ACCOUNT],
2116 va_arg(param, char *));
2119 case CURLOPT_IGNORE_CONTENT_LENGTH:
2120 data->set.ignorecl = (0 != va_arg(param, long))?TRUE:FALSE;
2123 case CURLOPT_CONNECT_ONLY:
2125 * No data transfer, set up connection and let application use the socket
2127 data->set.connect_only = (0 != va_arg(param, long))?TRUE:FALSE;
2130 case CURLOPT_FTP_ALTERNATIVE_TO_USER:
2131 result = setstropt(&data->set.str[STRING_FTP_ALTERNATIVE_TO_USER],
2132 va_arg(param, char *));
2135 case CURLOPT_SOCKOPTFUNCTION:
2137 * socket callback function: called after socket() but before connect()
2139 data->set.fsockopt = va_arg(param, curl_sockopt_callback);
2142 case CURLOPT_SOCKOPTDATA:
2144 * socket callback data pointer. Might be NULL.
2146 data->set.sockopt_client = va_arg(param, void *);
2149 case CURLOPT_OPENSOCKETFUNCTION:
2151 * open/create socket callback function: called instead of socket(),
2154 data->set.fopensocket = va_arg(param, curl_opensocket_callback);
2157 case CURLOPT_OPENSOCKETDATA:
2159 * socket callback data pointer. Might be NULL.
2161 data->set.opensocket_client = va_arg(param, void *);
2164 case CURLOPT_CLOSESOCKETFUNCTION:
2166 * close socket callback function: called instead of close()
2167 * when shutting down a connection
2169 data->set.fclosesocket = va_arg(param, curl_closesocket_callback);
2172 case CURLOPT_CLOSESOCKETDATA:
2174 * socket callback data pointer. Might be NULL.
2176 data->set.closesocket_client = va_arg(param, void *);
2179 case CURLOPT_SSL_SESSIONID_CACHE:
2180 data->set.ssl.sessionid = (0 != va_arg(param, long))?TRUE:FALSE;
2184 /* we only include SSH options if explicitly built to support SSH */
2185 case CURLOPT_SSH_AUTH_TYPES:
2186 data->set.ssh_auth_types = va_arg(param, long);
2189 case CURLOPT_SSH_PUBLIC_KEYFILE:
2191 * Use this file instead of the $HOME/.ssh/id_dsa.pub file
2193 result = setstropt(&data->set.str[STRING_SSH_PUBLIC_KEY],
2194 va_arg(param, char *));
2197 case CURLOPT_SSH_PRIVATE_KEYFILE:
2199 * Use this file instead of the $HOME/.ssh/id_dsa file
2201 result = setstropt(&data->set.str[STRING_SSH_PRIVATE_KEY],
2202 va_arg(param, char *));
2204 case CURLOPT_SSH_HOST_PUBLIC_KEY_MD5:
2206 * Option to allow for the MD5 of the host public key to be checked
2207 * for validation purposes.
2209 result = setstropt(&data->set.str[STRING_SSH_HOST_PUBLIC_KEY_MD5],
2210 va_arg(param, char *));
2212 #ifdef HAVE_LIBSSH2_KNOWNHOST_API
2213 case CURLOPT_SSH_KNOWNHOSTS:
2215 * Store the file name to read known hosts from.
2217 result = setstropt(&data->set.str[STRING_SSH_KNOWNHOSTS],
2218 va_arg(param, char *));
2221 case CURLOPT_SSH_KEYFUNCTION:
2222 /* setting to NULL is fine since the ssh.c functions themselves will
2223 then rever to use the internal default */
2224 data->set.ssh_keyfunc = va_arg(param, curl_sshkeycallback);
2227 case CURLOPT_SSH_KEYDATA:
2229 * Custom client data to pass to the SSH keyfunc callback
2231 data->set.ssh_keyfunc_userp = va_arg(param, void *);
2233 #endif /* HAVE_LIBSSH2_KNOWNHOST_API */
2235 #endif /* USE_LIBSSH2 */
2237 case CURLOPT_HTTP_TRANSFER_DECODING:
2239 * disable libcurl transfer encoding is used
2241 data->set.http_te_skip = (0 == va_arg(param, long))?TRUE:FALSE;
2244 case CURLOPT_HTTP_CONTENT_DECODING:
2246 * raw data passed to the application when content encoding is used
2248 data->set.http_ce_skip = (0 == va_arg(param, long))?TRUE:FALSE;
2251 case CURLOPT_NEW_FILE_PERMS:
2253 * Uses these permissions instead of 0644
2255 data->set.new_file_perms = va_arg(param, long);
2258 case CURLOPT_NEW_DIRECTORY_PERMS:
2260 * Uses these permissions instead of 0755
2262 data->set.new_directory_perms = va_arg(param, long);
2265 case CURLOPT_ADDRESS_SCOPE:
2267 * We always get longs when passed plain numericals, but for this value we
2268 * know that an unsigned int will always hold the value so we blindly
2269 * typecast to this type
2271 data->set.scope = curlx_sltoui(va_arg(param, long));
2274 case CURLOPT_PROTOCOLS:
2275 /* set the bitmask for the protocols that are allowed to be used for the
2276 transfer, which thus helps the app which takes URLs from users or other
2277 external inputs and want to restrict what protocol(s) to deal
2278 with. Defaults to CURLPROTO_ALL. */
2279 data->set.allowed_protocols = va_arg(param, long);
2282 case CURLOPT_REDIR_PROTOCOLS:
2283 /* set the bitmask for the protocols that libcurl is allowed to follow to,
2284 as a subset of the CURLOPT_PROTOCOLS ones. That means the protocol needs
2285 to be set in both bitmasks to be allowed to get redirected to. Defaults
2286 to all protocols except FILE and SCP. */
2287 data->set.redir_protocols = va_arg(param, long);
2290 case CURLOPT_MAIL_FROM:
2291 /* Set the SMTP mail originator */
2292 result = setstropt(&data->set.str[STRING_MAIL_FROM],
2293 va_arg(param, char *));
2296 case CURLOPT_MAIL_AUTH:
2297 /* Set the SMTP auth originator */
2298 result = setstropt(&data->set.str[STRING_MAIL_AUTH],
2299 va_arg(param, char *));
2302 case CURLOPT_MAIL_RCPT:
2303 /* Set the list of mail recipients */
2304 data->set.mail_rcpt = va_arg(param, struct curl_slist *);
2307 case CURLOPT_SASL_IR:
2308 /* Enable/disable SASL initial response */
2309 data->set.sasl_ir = (0 != va_arg(param, long)) ? TRUE : FALSE;
2312 case CURLOPT_RTSP_REQUEST:
2315 * Set the RTSP request method (OPTIONS, SETUP, PLAY, etc...)
2316 * Would this be better if the RTSPREQ_* were just moved into here?
2318 long curl_rtspreq = va_arg(param, long);
2319 Curl_RtspReq rtspreq = RTSPREQ_NONE;
2320 switch(curl_rtspreq) {
2321 case CURL_RTSPREQ_OPTIONS:
2322 rtspreq = RTSPREQ_OPTIONS;
2325 case CURL_RTSPREQ_DESCRIBE:
2326 rtspreq = RTSPREQ_DESCRIBE;
2329 case CURL_RTSPREQ_ANNOUNCE:
2330 rtspreq = RTSPREQ_ANNOUNCE;
2333 case CURL_RTSPREQ_SETUP:
2334 rtspreq = RTSPREQ_SETUP;
2337 case CURL_RTSPREQ_PLAY:
2338 rtspreq = RTSPREQ_PLAY;
2341 case CURL_RTSPREQ_PAUSE:
2342 rtspreq = RTSPREQ_PAUSE;
2345 case CURL_RTSPREQ_TEARDOWN:
2346 rtspreq = RTSPREQ_TEARDOWN;
2349 case CURL_RTSPREQ_GET_PARAMETER:
2350 rtspreq = RTSPREQ_GET_PARAMETER;
2353 case CURL_RTSPREQ_SET_PARAMETER:
2354 rtspreq = RTSPREQ_SET_PARAMETER;
2357 case CURL_RTSPREQ_RECORD:
2358 rtspreq = RTSPREQ_RECORD;
2361 case CURL_RTSPREQ_RECEIVE:
2362 rtspreq = RTSPREQ_RECEIVE;
2365 rtspreq = RTSPREQ_NONE;
2368 data->set.rtspreq = rtspreq;
2373 case CURLOPT_RTSP_SESSION_ID:
2375 * Set the RTSP Session ID manually. Useful if the application is
2376 * resuming a previously established RTSP session
2378 result = setstropt(&data->set.str[STRING_RTSP_SESSION_ID],
2379 va_arg(param, char *));
2382 case CURLOPT_RTSP_STREAM_URI:
2384 * Set the Stream URI for the RTSP request. Unless the request is
2385 * for generic server options, the application will need to set this.
2387 result = setstropt(&data->set.str[STRING_RTSP_STREAM_URI],
2388 va_arg(param, char *));
2391 case CURLOPT_RTSP_TRANSPORT:
2393 * The content of the Transport: header for the RTSP request
2395 result = setstropt(&data->set.str[STRING_RTSP_TRANSPORT],
2396 va_arg(param, char *));
2399 case CURLOPT_RTSP_CLIENT_CSEQ:
2401 * Set the CSEQ number to issue for the next RTSP request. Useful if the
2402 * application is resuming a previously broken connection. The CSEQ
2403 * will increment from this new number henceforth.
2405 data->state.rtsp_next_client_CSeq = va_arg(param, long);
2408 case CURLOPT_RTSP_SERVER_CSEQ:
2409 /* Same as the above, but for server-initiated requests */
2410 data->state.rtsp_next_client_CSeq = va_arg(param, long);
2413 case CURLOPT_INTERLEAVEDATA:
2414 data->set.rtp_out = va_arg(param, void *);
2416 case CURLOPT_INTERLEAVEFUNCTION:
2417 /* Set the user defined RTP write function */
2418 data->set.fwrite_rtp = va_arg(param, curl_write_callback);
2421 case CURLOPT_WILDCARDMATCH:
2422 data->set.wildcardmatch = (0 != va_arg(param, long))?TRUE:FALSE;
2424 case CURLOPT_CHUNK_BGN_FUNCTION:
2425 data->set.chunk_bgn = va_arg(param, curl_chunk_bgn_callback);
2427 case CURLOPT_CHUNK_END_FUNCTION:
2428 data->set.chunk_end = va_arg(param, curl_chunk_end_callback);
2430 case CURLOPT_FNMATCH_FUNCTION:
2431 data->set.fnmatch = va_arg(param, curl_fnmatch_callback);
2433 case CURLOPT_CHUNK_DATA:
2434 data->wildcard.customptr = va_arg(param, void *);
2436 case CURLOPT_FNMATCH_DATA:
2437 data->set.fnmatch_data = va_arg(param, void *);
2440 case CURLOPT_TLSAUTH_USERNAME:
2441 result = setstropt(&data->set.str[STRING_TLSAUTH_USERNAME],
2442 va_arg(param, char *));
2443 if(data->set.str[STRING_TLSAUTH_USERNAME] && !data->set.ssl.authtype)
2444 data->set.ssl.authtype = CURL_TLSAUTH_SRP; /* default to SRP */
2446 case CURLOPT_TLSAUTH_PASSWORD:
2447 result = setstropt(&data->set.str[STRING_TLSAUTH_PASSWORD],
2448 va_arg(param, char *));
2449 if(data->set.str[STRING_TLSAUTH_USERNAME] && !data->set.ssl.authtype)
2450 data->set.ssl.authtype = CURL_TLSAUTH_SRP; /* default to SRP */
2452 case CURLOPT_TLSAUTH_TYPE:
2453 if(strnequal((char *)va_arg(param, char *), "SRP", strlen("SRP")))
2454 data->set.ssl.authtype = CURL_TLSAUTH_SRP;
2456 data->set.ssl.authtype = CURL_TLSAUTH_NONE;
2459 case CURLOPT_DNS_SERVERS:
2460 result = Curl_set_dns_servers(data, va_arg(param, char *));
2462 case CURLOPT_DNS_INTERFACE:
2463 result = Curl_set_dns_interface(data, va_arg(param, char *));
2465 case CURLOPT_DNS_LOCAL_IP4:
2466 result = Curl_set_dns_local_ip4(data, va_arg(param, char *));
2468 case CURLOPT_DNS_LOCAL_IP6:
2469 result = Curl_set_dns_local_ip6(data, va_arg(param, char *));
2472 case CURLOPT_TCP_KEEPALIVE:
2473 data->set.tcp_keepalive = (0 != va_arg(param, long))?TRUE:FALSE;
2475 case CURLOPT_TCP_KEEPIDLE:
2476 data->set.tcp_keepidle = va_arg(param, long);
2478 case CURLOPT_TCP_KEEPINTVL:
2479 data->set.tcp_keepintvl = va_arg(param, long);
2483 /* unknown tag and its companion, just ignore: */
2484 result = CURLE_UNKNOWN_OPTION;
2491 static void conn_free(struct connectdata *conn)
2496 /* possible left-overs from the async name resolvers */
2497 Curl_resolver_cancel(conn);
2499 /* close the SSL stuff before we close any sockets since they will/may
2500 write to the sockets */
2501 Curl_ssl_close(conn, FIRSTSOCKET);
2502 Curl_ssl_close(conn, SECONDARYSOCKET);
2504 /* close possibly still open sockets */
2505 if(CURL_SOCKET_BAD != conn->sock[SECONDARYSOCKET])
2506 Curl_closesocket(conn, conn->sock[SECONDARYSOCKET]);
2507 if(CURL_SOCKET_BAD != conn->sock[FIRSTSOCKET])
2508 Curl_closesocket(conn, conn->sock[FIRSTSOCKET]);
2509 if(CURL_SOCKET_BAD != conn->tempsock[0])
2510 Curl_closesocket(conn, conn->tempsock[0]);
2511 if(CURL_SOCKET_BAD != conn->tempsock[1])
2512 Curl_closesocket(conn, conn->tempsock[1]);
2514 #if defined(USE_NTLM) && defined(NTLM_WB_ENABLED)
2515 Curl_ntlm_wb_cleanup(conn);
2518 Curl_safefree(conn->user);
2519 Curl_safefree(conn->passwd);
2520 Curl_safefree(conn->xoauth2_bearer);
2521 Curl_safefree(conn->options);
2522 Curl_safefree(conn->proxyuser);
2523 Curl_safefree(conn->proxypasswd);
2524 Curl_safefree(conn->allocptr.proxyuserpwd);
2525 Curl_safefree(conn->allocptr.uagent);
2526 Curl_safefree(conn->allocptr.userpwd);
2527 Curl_safefree(conn->allocptr.accept_encoding);
2528 Curl_safefree(conn->allocptr.te);
2529 Curl_safefree(conn->allocptr.rangeline);
2530 Curl_safefree(conn->allocptr.ref);
2531 Curl_safefree(conn->allocptr.host);
2532 Curl_safefree(conn->allocptr.cookiehost);
2533 Curl_safefree(conn->allocptr.rtsp_transport);
2534 Curl_safefree(conn->trailer);
2535 Curl_safefree(conn->host.rawalloc); /* host name buffer */
2536 Curl_safefree(conn->proxy.rawalloc); /* proxy name buffer */
2537 Curl_safefree(conn->master_buffer);
2539 Curl_llist_destroy(conn->send_pipe, NULL);
2540 Curl_llist_destroy(conn->recv_pipe, NULL);
2542 conn->send_pipe = NULL;
2543 conn->recv_pipe = NULL;
2545 Curl_safefree(conn->localdev);
2546 Curl_free_ssl_config(&conn->ssl_config);
2548 free(conn); /* free all the connection oriented data */
2551 CURLcode Curl_disconnect(struct connectdata *conn, bool dead_connection)
2553 struct SessionHandle *data;
2555 return CURLE_OK; /* this is closed and fine already */
2559 DEBUGF(fprintf(stderr, "DISCONNECT without easy handle, ignoring\n"));
2563 if(conn->dns_entry != NULL) {
2564 Curl_resolv_unlock(data, conn->dns_entry);
2565 conn->dns_entry = NULL;
2568 Curl_hostcache_prune(data); /* kill old DNS cache entries */
2571 int has_host_ntlm = (conn->ntlm.state != NTLMSTATE_NONE);
2572 int has_proxy_ntlm = (conn->proxyntlm.state != NTLMSTATE_NONE);
2574 /* Authentication data is a mix of connection-related and sessionhandle-
2575 related stuff. NTLM is connection-related so when we close the shop
2579 data->state.authhost.done = FALSE;
2580 data->state.authhost.picked =
2581 data->state.authhost.want;
2584 if(has_proxy_ntlm) {
2585 data->state.authproxy.done = FALSE;
2586 data->state.authproxy.picked =
2587 data->state.authproxy.want;
2590 if(has_host_ntlm || has_proxy_ntlm)
2591 data->state.authproblem = FALSE;
2594 /* Cleanup NTLM connection-related data */
2595 Curl_http_ntlm_cleanup(conn);
2597 /* Cleanup possible redirect junk */
2598 if(data->req.newurl) {
2599 free(data->req.newurl);
2600 data->req.newurl = NULL;
2603 if(conn->handler->disconnect)
2604 /* This is set if protocol-specific cleanups should be made */
2605 conn->handler->disconnect(conn, dead_connection);
2607 /* unlink ourselves! */
2608 infof(data, "Closing connection %ld\n", conn->connection_id);
2609 Curl_conncache_remove_conn(data->state.conn_cache, conn);
2611 #if defined(USE_LIBIDN)
2612 if(conn->host.encalloc)
2613 idn_free(conn->host.encalloc); /* encoded host name buffer, must be freed
2614 with idn_free() since this was allocated
2616 if(conn->proxy.encalloc)
2617 idn_free(conn->proxy.encalloc); /* encoded proxy name buffer, must be
2618 freed with idn_free() since this was
2619 allocated by libidn */
2620 #elif defined(USE_WIN32_IDN)
2621 free(conn->host.encalloc); /* encoded host name buffer, must be freed with
2622 idn_free() since this was allocated by
2623 curl_win32_idn_to_ascii */
2624 if(conn->proxy.encalloc)
2625 free(conn->proxy.encalloc); /* encoded proxy name buffer, must be freed
2626 with idn_free() since this was allocated by
2627 curl_win32_idn_to_ascii */
2630 Curl_ssl_close(conn, FIRSTSOCKET);
2632 /* Indicate to all handles on the pipe that we're dead */
2633 if(Curl_multi_pipeline_enabled(data->multi)) {
2634 signalPipeClose(conn->send_pipe, TRUE);
2635 signalPipeClose(conn->recv_pipe, TRUE);
2640 Curl_speedinit(data);
2646 * This function should return TRUE if the socket is to be assumed to
2647 * be dead. Most commonly this happens when the server has closed the
2648 * connection due to inactivity.
2650 static bool SocketIsDead(curl_socket_t sock)
2653 bool ret_val = TRUE;
2655 sval = Curl_socket_ready(sock, CURL_SOCKET_BAD, 0);
2663 static bool IsPipeliningPossible(const struct SessionHandle *handle,
2664 const struct connectdata *conn)
2666 if((conn->handler->protocol & CURLPROTO_HTTP) &&
2667 Curl_multi_pipeline_enabled(handle->multi) &&
2668 (handle->set.httpreq == HTTPREQ_GET ||
2669 handle->set.httpreq == HTTPREQ_HEAD) &&
2670 handle->set.httpversion != CURL_HTTP_VERSION_1_0)
2676 bool Curl_isPipeliningEnabled(const struct SessionHandle *handle)
2678 return Curl_multi_pipeline_enabled(handle->multi);
2681 CURLcode Curl_addHandleToPipeline(struct SessionHandle *data,
2682 struct curl_llist *pipeline)
2684 if(!Curl_llist_insert_next(pipeline, pipeline->tail, data))
2685 return CURLE_OUT_OF_MEMORY;
2686 infof(data, "Curl_addHandleToPipeline: length: %d\n", pipeline->size);
2690 int Curl_removeHandleFromPipeline(struct SessionHandle *handle,
2691 struct curl_llist *pipeline)
2693 struct curl_llist_element *curr;
2695 curr = pipeline->head;
2697 if(curr->ptr == handle) {
2698 Curl_llist_remove(pipeline, curr, NULL);
2699 return 1; /* we removed a handle */
2707 #if 0 /* this code is saved here as it is useful for debugging purposes */
2708 static void Curl_printPipeline(struct curl_llist *pipeline)
2710 struct curl_llist_element *curr;
2712 curr = pipeline->head;
2714 struct SessionHandle *data = (struct SessionHandle *) curr->ptr;
2715 infof(data, "Handle in pipeline: %s\n", data->state.path);
2721 static struct SessionHandle* gethandleathead(struct curl_llist *pipeline)
2723 struct curl_llist_element *curr = pipeline->head;
2725 return (struct SessionHandle *) curr->ptr;
2731 /* remove the specified connection from all (possible) pipelines and related
2733 void Curl_getoff_all_pipelines(struct SessionHandle *data,
2734 struct connectdata *conn)
2736 bool recv_head = (conn->readchannel_inuse &&
2737 (gethandleathead(conn->recv_pipe) == data)) ? TRUE : FALSE;
2739 bool send_head = (conn->writechannel_inuse &&
2740 (gethandleathead(conn->send_pipe) == data)) ? TRUE : FALSE;
2742 if(Curl_removeHandleFromPipeline(data, conn->recv_pipe) && recv_head)
2743 conn->readchannel_inuse = FALSE;
2744 if(Curl_removeHandleFromPipeline(data, conn->send_pipe) && send_head)
2745 conn->writechannel_inuse = FALSE;
2748 static void signalPipeClose(struct curl_llist *pipeline, bool pipe_broke)
2750 struct curl_llist_element *curr;
2755 curr = pipeline->head;
2757 struct curl_llist_element *next = curr->next;
2758 struct SessionHandle *data = (struct SessionHandle *) curr->ptr;
2760 #ifdef DEBUGBUILD /* debug-only code */
2761 if(data->magic != CURLEASY_MAGIC_NUMBER) {
2763 infof(data, "signalPipeClose() found BAAD easy handle\n");
2768 data->state.pipe_broke = TRUE;
2769 Curl_multi_handlePipeBreak(data);
2770 Curl_llist_remove(pipeline, curr, NULL);
2776 * This function finds the connection in the connection
2777 * cache that has been unused for the longest time.
2779 * Returns the pointer to the oldest idle connection, or NULL if none was
2782 static struct connectdata *
2783 find_oldest_idle_connection(struct SessionHandle *data)
2785 struct conncache *bc = data->state.conn_cache;
2786 struct curl_hash_iterator iter;
2787 struct curl_llist_element *curr;
2788 struct curl_hash_element *he;
2792 struct connectdata *conn_candidate = NULL;
2793 struct connectbundle *bundle;
2797 Curl_hash_start_iterate(bc->hash, &iter);
2799 he = Curl_hash_next_element(&iter);
2801 struct connectdata *conn;
2805 curr = bundle->conn_list->head;
2810 /* Set higher score for the age passed since the connection was used */
2811 score = Curl_tvdiff(now, conn->now);
2813 if(score > highscore) {
2815 conn_candidate = conn;
2821 he = Curl_hash_next_element(&iter);
2824 return conn_candidate;
2828 * This function finds the connection in the connection
2829 * bundle that has been unused for the longest time.
2831 * Returns the pointer to the oldest idle connection, or NULL if none was
2834 static struct connectdata *
2835 find_oldest_idle_connection_in_bundle(struct SessionHandle *data,
2836 struct connectbundle *bundle)
2838 struct curl_llist_element *curr;
2842 struct connectdata *conn_candidate = NULL;
2843 struct connectdata *conn;
2849 curr = bundle->conn_list->head;
2854 /* Set higher score for the age passed since the connection was used */
2855 score = Curl_tvdiff(now, conn->now);
2857 if(score > highscore) {
2859 conn_candidate = conn;
2865 return conn_candidate;
2869 * Given one filled in connection struct (named needle), this function should
2870 * detect if there already is one that has all the significant details
2871 * exactly the same and thus should be used instead.
2873 * If there is a match, this function returns TRUE - and has marked the
2874 * connection as 'in-use'. It must later be called with ConnectionDone() to
2875 * return back to 'idle' (unused) state.
2877 * The force_reuse flag is set if the connection must be used, even if
2878 * the pipelining strategy wants to open a new connection instead of reusing.
2881 ConnectionExists(struct SessionHandle *data,
2882 struct connectdata *needle,
2883 struct connectdata **usethis,
2886 struct connectdata *check;
2887 struct connectdata *chosen = 0;
2888 bool canPipeline = IsPipeliningPossible(data, needle);
2889 bool wantNTLM = (data->state.authhost.want==CURLAUTH_NTLM) ||
2890 (data->state.authhost.want==CURLAUTH_NTLM_WB) ? TRUE : FALSE;
2891 struct connectbundle *bundle;
2893 *force_reuse = FALSE;
2895 /* We can't pipe if the site is blacklisted */
2896 if(canPipeline && Curl_pipeline_site_blacklisted(data, needle)) {
2897 canPipeline = FALSE;
2900 /* Look up the bundle with all the connections to this
2902 bundle = Curl_conncache_find_bundle(data->state.conn_cache,
2905 size_t max_pipe_len = Curl_multi_max_pipeline_length(data->multi);
2906 size_t best_pipe_len = max_pipe_len;
2907 struct curl_llist_element *curr;
2909 infof(data, "Found bundle for host %s: %p\n",
2910 needle->host.name, (void *)bundle);
2912 /* We can't pipe if we don't know anything about the server */
2913 if(canPipeline && !bundle->server_supports_pipelining) {
2914 infof(data, "Server doesn't support pipelining\n");
2915 canPipeline = FALSE;
2918 curr = bundle->conn_list->head;
2921 bool credentialsMatch = FALSE;
2925 * Note that if we use a HTTP proxy, we check connections to that
2926 * proxy and not to the actual remote server.
2931 pipeLen = check->send_pipe->size + check->recv_pipe->size;
2933 if(!pipeLen && !check->inuse) {
2934 /* The check for a dead socket makes sense only if there are no
2935 handles in pipeline and the connection isn't already marked in
2938 if(check->handler->protocol & CURLPROTO_RTSP)
2939 /* RTSP is a special case due to RTP interleaving */
2940 dead = Curl_rtsp_connisdead(check);
2942 dead = SocketIsDead(check->sock[FIRSTSOCKET]);
2946 infof(data, "Connection %ld seems to be dead!\n",
2947 check->connection_id);
2949 /* disconnect resources */
2950 Curl_disconnect(check, /* dead_connection */ TRUE);
2956 /* Make sure the pipe has only GET requests */
2957 struct SessionHandle* sh = gethandleathead(check->send_pipe);
2958 struct SessionHandle* rh = gethandleathead(check->recv_pipe);
2960 if(!IsPipeliningPossible(sh, check))
2964 if(!IsPipeliningPossible(rh, check))
2970 /* can only happen within multi handles, and means that another easy
2971 handle is using this connection */
2975 if(Curl_resolver_asynch()) {
2976 /* ip_addr_str[0] is NUL only if the resolving of the name hasn't
2977 completed yet and until then we don't re-use this connection */
2978 if(!check->ip_addr_str[0]) {
2980 "Connection #%ld is still name resolving, can't reuse\n",
2981 check->connection_id);
2986 if((check->sock[FIRSTSOCKET] == CURL_SOCKET_BAD) ||
2987 check->bits.close) {
2988 /* Don't pick a connection that hasn't connected yet or that is going
2990 infof(data, "Connection #%ld isn't open enough, can't reuse\n",
2991 check->connection_id);
2993 if(check->recv_pipe->size > 0) {
2995 "BAD! Unconnected #%ld has a non-empty recv pipeline!\n",
2996 check->connection_id);
3003 if((needle->handler->flags&PROTOPT_SSL) !=
3004 (check->handler->flags&PROTOPT_SSL))
3005 /* don't do mixed SSL and non-SSL connections */
3006 if(!(needle->handler->protocol & check->handler->protocol))
3007 /* except protocols that have been upgraded via TLS */
3010 if(needle->handler->flags&PROTOPT_SSL) {
3011 if((data->set.ssl.verifypeer != check->verifypeer) ||
3012 (data->set.ssl.verifyhost != check->verifyhost))
3016 if(needle->bits.proxy != check->bits.proxy)
3017 /* don't do mixed proxy and non-proxy connections */
3020 if(!canPipeline && check->inuse)
3021 /* this request can't be pipelined but the checked connection is
3022 already in use so we skip it */
3025 if(needle->localdev || needle->localport) {
3026 /* If we are bound to a specific local end (IP+port), we must not
3027 re-use a random other one, although if we didn't ask for a
3028 particular one we can reuse one that was bound.
3030 This comparison is a bit rough and too strict. Since the input
3031 parameters can be specified in numerous ways and still end up the
3032 same it would take a lot of processing to make it really accurate.
3033 Instead, this matching will assume that re-uses of bound connections
3034 will most likely also re-use the exact same binding parameters and
3035 missing out a few edge cases shouldn't hurt anyone very much.
3037 if((check->localport != needle->localport) ||
3038 (check->localportrange != needle->localportrange) ||
3040 !needle->localdev ||
3041 strcmp(check->localdev, needle->localdev))
3045 if((needle->handler->protocol & CURLPROTO_FTP) ||
3046 ((needle->handler->protocol & CURLPROTO_HTTP) && wantNTLM)) {
3047 /* This is FTP or HTTP+NTLM, verify that we're using the same name
3048 and password as well */
3049 if(!strequal(needle->user, check->user) ||
3050 !strequal(needle->passwd, check->passwd)) {
3051 /* one of them was different */
3054 credentialsMatch = TRUE;
3057 if(!needle->bits.httpproxy || needle->handler->flags&PROTOPT_SSL ||
3058 (needle->bits.httpproxy && check->bits.httpproxy &&
3059 needle->bits.tunnel_proxy && check->bits.tunnel_proxy &&
3060 Curl_raw_equal(needle->proxy.name, check->proxy.name) &&
3061 (needle->port == check->port))) {
3062 /* The requested connection does not use a HTTP proxy or it uses SSL or
3063 it is a non-SSL protocol tunneled over the same http proxy name and
3064 port number or it is a non-SSL protocol which is allowed to be
3067 if((Curl_raw_equal(needle->handler->scheme, check->handler->scheme) ||
3068 needle->handler->protocol & check->handler->protocol) &&
3069 Curl_raw_equal(needle->host.name, check->host.name) &&
3070 needle->remote_port == check->remote_port) {
3071 if(needle->handler->flags & PROTOPT_SSL) {
3072 /* This is a SSL connection so verify that we're using the same
3073 SSL options as well */
3074 if(!Curl_ssl_config_matches(&needle->ssl_config,
3075 &check->ssl_config)) {
3077 "Connection #%ld has different SSL parameters, "
3079 check->connection_id));
3082 else if(check->ssl[FIRSTSOCKET].state != ssl_connection_complete) {
3084 "Connection #%ld has not started SSL connect, "
3086 check->connection_id));
3093 else { /* The requested needle connection is using a proxy,
3094 is the checked one using the same host, port and type? */
3095 if(check->bits.proxy &&
3096 (needle->proxytype == check->proxytype) &&
3097 (needle->bits.tunnel_proxy == check->bits.tunnel_proxy) &&
3098 Curl_raw_equal(needle->proxy.name, check->proxy.name) &&
3099 needle->port == check->port) {
3100 /* This is the same proxy connection, use it! */
3106 /* If we are looking for an NTLM connection, check if this is already
3107 authenticating with the right credentials. If not, keep looking so
3108 that we can reuse NTLM connections if possible. (Especially we
3109 must not reuse the same connection if partway through
3112 if(credentialsMatch && check->ntlm.state != NTLMSTATE_NONE) {
3115 /* We must use this connection, no other */
3116 *force_reuse = TRUE;
3124 /* We can pipeline if we want to. Let's continue looking for
3125 the optimal connection to use, i.e the shortest pipe that is not
3129 /* We have the optimal connection. Let's stop looking. */
3134 /* We can't use the connection if the pipe is full */
3135 if(pipeLen >= max_pipe_len)
3138 /* We can't use the connection if the pipe is penalized */
3139 if(Curl_pipeline_penalized(data, check))
3142 if(pipeLen < best_pipe_len) {
3143 /* This connection has a shorter pipe so far. We'll pick this
3144 and continue searching */
3146 best_pipe_len = pipeLen;
3151 /* We have found a connection. Let's stop searching. */
3161 return TRUE; /* yes, we found one to use! */
3164 return FALSE; /* no matching connecting exists */
3167 /* Mark the connection as 'idle', or close it if the cache is full.
3168 Returns TRUE if the connection is kept, or FALSE if it was closed. */
3170 ConnectionDone(struct SessionHandle *data, struct connectdata *conn)
3172 /* data->multi->maxconnects can be negative, deal with it. */
3173 size_t maxconnects =
3174 (data->multi->maxconnects < 0) ? 0 : data->multi->maxconnects;
3175 struct connectdata *conn_candidate = NULL;
3177 /* Mark the current connection as 'unused' */
3178 conn->inuse = FALSE;
3180 if(maxconnects > 0 &&
3181 data->state.conn_cache->num_connections > maxconnects) {
3182 infof(data, "Connection cache is full, closing the oldest one.\n");
3184 conn_candidate = find_oldest_idle_connection(data);
3186 if(conn_candidate) {
3187 /* Set the connection's owner correctly */
3188 conn_candidate->data = data;
3190 /* the winner gets the honour of being disconnected */
3191 (void)Curl_disconnect(conn_candidate, /* dead_connection */ FALSE);
3195 return (conn_candidate == conn) ? FALSE : TRUE;
3199 * The given input connection struct pointer is to be stored in the connection
3200 * cache. If the cache is already full, least interesting existing connection
3201 * (if any) gets closed.
3203 * The given connection should be unique. That must've been checked prior to
3206 static CURLcode ConnectionStore(struct SessionHandle *data,
3207 struct connectdata *conn)
3209 static int connection_id_counter = 0;
3213 /* Assign a number to the connection for easier tracking in the log
3215 conn->connection_id = connection_id_counter++;
3217 result = Curl_conncache_add_conn(data->state.conn_cache, conn);
3218 if(result != CURLE_OK)
3219 conn->connection_id = -1;
3224 /* after a TCP connection to the proxy has been verified, this function does
3225 the next magic step.
3227 Note: this function's sub-functions call failf()
3230 CURLcode Curl_connected_proxy(struct connectdata *conn,
3233 if(!conn->bits.proxy || sockindex)
3234 /* this magic only works for the primary socket as the secondary is used
3235 for FTP only and it has FTP specific magic in ftp.c */
3238 switch(conn->proxytype) {
3239 #ifndef CURL_DISABLE_PROXY
3240 case CURLPROXY_SOCKS5:
3241 case CURLPROXY_SOCKS5_HOSTNAME:
3242 return Curl_SOCKS5(conn->proxyuser, conn->proxypasswd,
3243 conn->host.name, conn->remote_port,
3246 case CURLPROXY_SOCKS4:
3247 return Curl_SOCKS4(conn->proxyuser, conn->host.name,
3248 conn->remote_port, FIRSTSOCKET, conn, FALSE);
3250 case CURLPROXY_SOCKS4A:
3251 return Curl_SOCKS4(conn->proxyuser, conn->host.name,
3252 conn->remote_port, FIRSTSOCKET, conn, TRUE);
3254 #endif /* CURL_DISABLE_PROXY */
3255 case CURLPROXY_HTTP:
3256 case CURLPROXY_HTTP_1_0:
3257 /* do nothing here. handled later. */
3261 } /* switch proxytype */
3267 * verboseconnect() displays verbose information after a connect
3269 #ifndef CURL_DISABLE_VERBOSE_STRINGS
3270 void Curl_verboseconnect(struct connectdata *conn)
3272 if(conn->data->set.verbose)
3273 infof(conn->data, "Connected to %s (%s) port %ld (#%ld)\n",
3274 conn->bits.proxy ? conn->proxy.dispname : conn->host.dispname,
3275 conn->ip_addr_str, conn->port, conn->connection_id);
3279 int Curl_protocol_getsock(struct connectdata *conn,
3280 curl_socket_t *socks,
3283 if(conn->handler->proto_getsock)
3284 return conn->handler->proto_getsock(conn, socks, numsocks);
3285 return GETSOCK_BLANK;
3288 int Curl_doing_getsock(struct connectdata *conn,
3289 curl_socket_t *socks,
3292 if(conn && conn->handler->doing_getsock)
3293 return conn->handler->doing_getsock(conn, socks, numsocks);
3294 return GETSOCK_BLANK;
3298 * We are doing protocol-specific connecting and this is being called over and
3299 * over from the multi interface until the connection phase is done on
3303 CURLcode Curl_protocol_connecting(struct connectdata *conn,
3306 CURLcode result=CURLE_OK;
3308 if(conn && conn->handler->connecting) {
3310 result = conn->handler->connecting(conn, done);
3319 * We are DOING this is being called over and over from the multi interface
3320 * until the DOING phase is done on protocol layer.
3323 CURLcode Curl_protocol_doing(struct connectdata *conn, bool *done)
3325 CURLcode result=CURLE_OK;
3327 if(conn && conn->handler->doing) {
3329 result = conn->handler->doing(conn, done);
3338 * We have discovered that the TCP connection has been successful, we can now
3339 * proceed with some action.
3342 CURLcode Curl_protocol_connect(struct connectdata *conn,
3343 bool *protocol_done)
3345 CURLcode result=CURLE_OK;
3347 *protocol_done = FALSE;
3349 if(conn->bits.tcpconnect[FIRSTSOCKET] && conn->bits.protoconnstart) {
3350 /* We already are connected, get back. This may happen when the connect
3351 worked fine in the first call, like when we connect to a local server
3352 or proxy. Note that we don't know if the protocol is actually done.
3354 Unless this protocol doesn't have any protocol-connect callback, as
3355 then we know we're done. */
3356 if(!conn->handler->connecting)
3357 *protocol_done = TRUE;
3362 if(!conn->bits.protoconnstart) {
3364 result = Curl_proxy_connect(conn);
3368 if(conn->bits.tunnel_proxy && conn->bits.httpproxy &&
3369 (conn->tunnel_state[FIRSTSOCKET] != TUNNEL_COMPLETE))
3370 /* when using an HTTP tunnel proxy, await complete tunnel establishment
3371 before proceeding further. Return CURLE_OK so we'll be called again */
3374 if(conn->handler->connect_it) {
3375 /* is there a protocol-specific connect() procedure? */
3377 /* Call the protocol-specific connect function */
3378 result = conn->handler->connect_it(conn, protocol_done);
3381 *protocol_done = TRUE;
3383 /* it has started, possibly even completed but that knowledge isn't stored
3386 conn->bits.protoconnstart = TRUE;
3389 return result; /* pass back status */
3393 * Helpers for IDNA convertions.
3395 static bool is_ASCII_name(const char *hostname)
3397 const unsigned char *ch = (const unsigned char*)hostname;
3408 * Check if characters in hostname is allowed in Top Level Domain.
3410 static bool tld_check_name(struct SessionHandle *data,
3411 const char *ace_hostname)
3414 char *uc_name = NULL;
3416 #ifndef CURL_DISABLE_VERBOSE_STRINGS
3417 const char *tld_errmsg = "<no msg>";
3422 /* Convert (and downcase) ACE-name back into locale's character set */
3423 rc = idna_to_unicode_lzlz(ace_hostname, &uc_name, 0);
3424 if(rc != IDNA_SUCCESS)
3427 rc = tld_check_lz(uc_name, &err_pos, NULL);
3428 #ifndef CURL_DISABLE_VERBOSE_STRINGS
3429 #ifdef HAVE_TLD_STRERROR
3430 if(rc != TLD_SUCCESS)
3431 tld_errmsg = tld_strerror((Tld_rc)rc);
3433 if(rc == TLD_INVALID)
3434 infof(data, "WARNING: %s; pos %u = `%c'/0x%02X\n",
3435 tld_errmsg, err_pos, uc_name[err_pos],
3436 uc_name[err_pos] & 255);
3437 else if(rc != TLD_SUCCESS)
3438 infof(data, "WARNING: TLD check for %s failed; %s\n",
3439 uc_name, tld_errmsg);
3440 #endif /* CURL_DISABLE_VERBOSE_STRINGS */
3443 if(rc != TLD_SUCCESS)
3451 * Perform any necessary IDN conversion of hostname
3453 static void fix_hostname(struct SessionHandle *data,
3454 struct connectdata *conn, struct hostname *host)
3459 #elif defined(CURL_DISABLE_VERBOSE_STRINGS)
3463 /* set the name we use to display the host name */
3464 host->dispname = host->name;
3465 if(!is_ASCII_name(host->name)) {
3467 /*************************************************************
3468 * Check name for non-ASCII and convert hostname to ACE form.
3469 *************************************************************/
3470 if(stringprep_check_version(LIBIDN_REQUIRED_VERSION)) {
3471 char *ace_hostname = NULL;
3472 int rc = idna_to_ascii_lz(host->name, &ace_hostname, 0);
3473 infof (data, "Input domain encoded as `%s'\n",
3474 stringprep_locale_charset ());
3475 if(rc != IDNA_SUCCESS)
3476 infof(data, "Failed to convert %s to ACE; %s\n",
3477 host->name, Curl_idn_strerror(conn,rc));
3479 /* tld_check_name() displays a warning if the host name contains
3480 "illegal" characters for this TLD */
3481 (void)tld_check_name(data, ace_hostname);
3483 host->encalloc = ace_hostname;
3484 /* change the name pointer to point to the encoded hostname */
3485 host->name = host->encalloc;
3488 #elif defined(USE_WIN32_IDN)
3489 /*************************************************************
3490 * Check name for non-ASCII and convert hostname to ACE form.
3491 *************************************************************/
3492 char *ace_hostname = NULL;
3493 int rc = curl_win32_idn_to_ascii(host->name, &ace_hostname);
3495 infof(data, "Failed to convert %s to ACE;\n",
3498 host->encalloc = ace_hostname;
3499 /* change the name pointer to point to the encoded hostname */
3500 host->name = host->encalloc;
3503 infof(data, "IDN support not present, can't parse Unicode domains\n");
3508 static void llist_dtor(void *user, void *element)
3516 * Allocate and initialize a new connectdata object.
3518 static struct connectdata *allocate_conn(struct SessionHandle *data)
3520 struct connectdata *conn = calloc(1, sizeof(struct connectdata));
3524 conn->handler = &Curl_handler_dummy; /* Be sure we have a handler defined
3525 already from start to avoid NULL
3526 situations and checks */
3528 /* and we setup a few fields in case we end up actually using this struct */
3530 conn->sock[FIRSTSOCKET] = CURL_SOCKET_BAD; /* no file descriptor */
3531 conn->sock[SECONDARYSOCKET] = CURL_SOCKET_BAD; /* no file descriptor */
3532 conn->tempsock[0] = CURL_SOCKET_BAD; /* no file descriptor */
3533 conn->tempsock[1] = CURL_SOCKET_BAD; /* no file descriptor */
3534 conn->connection_id = -1; /* no ID */
3535 conn->port = -1; /* unknown at this point */
3537 /* Default protocol-independent behavior doesn't support persistent
3538 connections, so we set this to force-close. Protocols that support
3539 this need to set this to FALSE in their "curl_do" functions. */
3540 conn->bits.close = TRUE;
3542 /* Store creation time to help future close decision making */
3543 conn->created = Curl_tvnow();
3545 conn->data = data; /* Setup the association between this connection
3546 and the SessionHandle */
3548 conn->proxytype = data->set.proxytype; /* type */
3550 #ifdef CURL_DISABLE_PROXY
3552 conn->bits.proxy = FALSE;
3553 conn->bits.httpproxy = FALSE;
3554 conn->bits.proxy_user_passwd = FALSE;
3555 conn->bits.tunnel_proxy = FALSE;
3557 #else /* CURL_DISABLE_PROXY */
3559 /* note that these two proxy bits are now just on what looks to be
3560 requested, they may be altered down the road */
3561 conn->bits.proxy = (data->set.str[STRING_PROXY] &&
3562 *data->set.str[STRING_PROXY])?TRUE:FALSE;
3563 conn->bits.httpproxy = (conn->bits.proxy &&
3564 (conn->proxytype == CURLPROXY_HTTP ||
3565 conn->proxytype == CURLPROXY_HTTP_1_0))?TRUE:FALSE;
3566 conn->bits.proxy_user_passwd =
3567 (NULL != data->set.str[STRING_PROXYUSERNAME])?TRUE:FALSE;
3568 conn->bits.tunnel_proxy = data->set.tunnel_thru_httpproxy;
3570 #endif /* CURL_DISABLE_PROXY */
3572 conn->bits.user_passwd = (NULL != data->set.str[STRING_USERNAME])?TRUE:FALSE;
3573 conn->bits.ftp_use_epsv = data->set.ftp_use_epsv;
3574 conn->bits.ftp_use_eprt = data->set.ftp_use_eprt;
3576 conn->verifypeer = data->set.ssl.verifypeer;
3577 conn->verifyhost = data->set.ssl.verifyhost;
3579 conn->ip_version = data->set.ipver;
3581 #if defined(USE_NTLM) && defined(NTLM_WB_ENABLED)
3582 conn->ntlm_auth_hlpr_socket = CURL_SOCKET_BAD;
3583 conn->ntlm_auth_hlpr_pid = 0;
3584 conn->challenge_header = NULL;
3585 conn->response_header = NULL;
3588 if(Curl_multi_pipeline_enabled(data->multi) &&
3589 !conn->master_buffer) {
3590 /* Allocate master_buffer to be used for pipelining */
3591 conn->master_buffer = calloc(BUFSIZE, sizeof (char));
3592 if(!conn->master_buffer)
3596 /* Initialize the pipeline lists */
3597 conn->send_pipe = Curl_llist_alloc((curl_llist_dtor) llist_dtor);
3598 conn->recv_pipe = Curl_llist_alloc((curl_llist_dtor) llist_dtor);
3599 if(!conn->send_pipe || !conn->recv_pipe)
3603 conn->data_prot = PROT_CLEAR;
3606 /* Store the local bind parameters that will be used for this connection */
3607 if(data->set.str[STRING_DEVICE]) {
3608 conn->localdev = strdup(data->set.str[STRING_DEVICE]);
3612 conn->localportrange = data->set.localportrange;
3613 conn->localport = data->set.localport;
3615 /* the close socket stuff needs to be copied to the connection struct as
3616 it may live on without (this specific) SessionHandle */
3617 conn->fclosesocket = data->set.fclosesocket;
3618 conn->closesocket_client = data->set.closesocket_client;
3623 Curl_llist_destroy(conn->send_pipe, NULL);
3624 Curl_llist_destroy(conn->recv_pipe, NULL);
3626 conn->send_pipe = NULL;
3627 conn->recv_pipe = NULL;
3629 Curl_safefree(conn->master_buffer);
3630 Curl_safefree(conn->localdev);
3631 Curl_safefree(conn);
3635 static CURLcode findprotocol(struct SessionHandle *data,
3636 struct connectdata *conn,
3637 const char *protostr)
3639 const struct Curl_handler * const *pp;
3640 const struct Curl_handler *p;
3642 /* Scan protocol handler table and match against 'protostr' to set a few
3643 variables based on the URL. Now that the handler may be changed later
3644 when the protocol specific setup function is called. */
3645 for(pp = protocols; (p = *pp) != NULL; pp++) {
3646 if(Curl_raw_equal(p->scheme, protostr)) {
3647 /* Protocol found in table. Check if allowed */
3648 if(!(data->set.allowed_protocols & p->protocol))
3652 /* it is allowed for "normal" request, now do an extra check if this is
3653 the result of a redirect */
3654 if(data->state.this_is_a_follow &&
3655 !(data->set.redir_protocols & p->protocol))
3659 /* Perform setup complement if some. */
3660 conn->handler = conn->given = p;
3662 /* 'port' and 'remote_port' are set in setup_connection_internals() */
3668 /* The protocol was not found in the table, but we don't have to assign it
3669 to anything since it is already assigned to a dummy-struct in the
3670 create_conn() function when the connectdata struct is allocated. */
3671 failf(data, "Protocol %s not supported or disabled in " LIBCURL_NAME,
3674 return CURLE_UNSUPPORTED_PROTOCOL;
3678 * Parse URL and fill in the relevant members of the connection struct.
3680 static CURLcode parseurlandfillconn(struct SessionHandle *data,
3681 struct connectdata *conn,
3683 char **userp, char **passwdp,
3688 char *path = data->state.path;
3694 bool rebuild_url = FALSE;
3696 *prot_missing = FALSE;
3698 /*************************************************************
3701 * We need to parse the url even when using the proxy, because we will need
3702 * the hostname and port in case we are trying to SSL connect through the
3703 * proxy -- and we don't know if we will need to use SSL until we parse the
3705 ************************************************************/
3706 if((2 == sscanf(data->change.url, "%15[^:]:%[^\n]",
3708 Curl_raw_equal(protobuf, "file")) {
3709 if(path[0] == '/' && path[1] == '/') {
3710 /* Allow omitted hostname (e.g. file:/<path>). This is not strictly
3711 * speaking a valid file: URL by RFC 1738, but treating file:/<path> as
3712 * file://localhost/<path> is similar to how other schemes treat missing
3713 * hostnames. See RFC 1808. */
3715 /* This cannot be done with strcpy() in a portable manner, since the
3716 memory areas overlap! */
3717 memmove(path, path + 2, strlen(path + 2)+1);
3720 * we deal with file://<host>/<path> differently since it supports no
3721 * hostname other than "localhost" and "127.0.0.1", which is unique among
3722 * the URL protocols specified in RFC 1738
3724 if(path[0] != '/') {
3725 /* the URL included a host name, we ignore host names in file:// URLs
3726 as the standards don't define what to do with them */
3727 char *ptr=strchr(path, '/');
3729 /* there was a slash present
3731 RFC1738 (section 3.1, page 5) says:
3733 The rest of the locator consists of data specific to the scheme,
3734 and is known as the "url-path". It supplies the details of how the
3735 specified resource can be accessed. Note that the "/" between the
3736 host (or port) and the url-path is NOT part of the url-path.
3738 As most agents use file://localhost/foo to get '/foo' although the
3739 slash preceding foo is a separator and not a slash for the path,
3740 a URL as file://localhost//foo must be valid as well, to refer to
3741 the same file with an absolute path.
3744 if(ptr[1] && ('/' == ptr[1]))
3745 /* if there was two slashes, we skip the first one as that is then
3746 used truly as a separator */
3749 /* This cannot be made with strcpy, as the memory chunks overlap! */
3750 memmove(path, ptr, strlen(ptr)+1);
3754 protop = "file"; /* protocol string */
3760 if(2 > sscanf(data->change.url,
3761 "%15[^\n:]://%[^\n/?]%[^\n]",
3763 conn->host.name, path)) {
3766 * The URL was badly formatted, let's try the browser-style _without_
3767 * protocol specified like 'http://'.
3769 rc = sscanf(data->change.url, "%[^\n/?]%[^\n]", conn->host.name, path);
3772 * We couldn't even get this format.
3773 * djgpp 2.04 has a sscanf() bug where 'conn->host.name' is
3774 * assigned, but the return value is EOF!
3776 #if defined(__DJGPP__) && (DJGPP_MINOR == 4)
3777 if(!(rc == -1 && *conn->host.name))
3780 failf(data, "<url> malformed");
3781 return CURLE_URL_MALFORMAT;
3786 * Since there was no protocol part specified, we guess what protocol it
3787 * is based on the first letters of the server name.
3790 /* Note: if you add a new protocol, please update the list in
3791 * lib/version.c too! */
3793 if(checkprefix("FTP.", conn->host.name))
3795 else if(checkprefix("DICT.", conn->host.name))
3797 else if(checkprefix("LDAP.", conn->host.name))
3799 else if(checkprefix("IMAP.", conn->host.name))
3801 else if(checkprefix("SMTP.", conn->host.name))
3803 else if(checkprefix("POP3.", conn->host.name))
3809 *prot_missing = TRUE; /* not given in URL */
3815 /* We search for '?' in the host name (but only on the right side of a
3816 * @-letter to allow ?-letters in username and password) to handle things
3817 * like http://example.com?param= (notice the missing '/').
3819 at = strchr(conn->host.name, '@');
3821 query = strchr(at+1, '?');
3823 query = strchr(conn->host.name, '?');
3826 /* We must insert a slash before the '?'-letter in the URL. If the URL had
3827 a slash after the '?', that is where the path currently begins and the
3828 '?string' is still part of the host name.
3830 We must move the trailing part from the host name and put it first in
3831 the path. And have it all prefixed with a slash.
3834 size_t hostlen = strlen(query);
3835 size_t pathlen = strlen(path);
3837 /* move the existing path plus the zero byte forward, to make room for
3838 the host-name part */
3839 memmove(path+hostlen+1, path, pathlen+1);
3841 /* now copy the trailing host part in front of the existing path */
3842 memcpy(path+1, query, hostlen);
3844 path[0]='/'; /* prepend the missing slash */
3847 *query=0; /* now cut off the hostname at the ? */
3850 /* if there's no path set, use a single slash */
3855 /* If the URL is malformatted (missing a '/' after hostname before path) we
3856 * insert a slash here. The only letter except '/' we accept to start a path
3859 if(path[0] == '?') {
3860 /* We need this function to deal with overlapping memory areas. We know
3861 that the memory area 'path' points to is 'urllen' bytes big and that
3862 is bigger than the path. Use +1 to move the zero byte too. */
3863 memmove(&path[1], path, strlen(path)+1);
3868 /* sanitise paths and remove ../ and ./ sequences according to RFC3986 */
3869 char *newp = Curl_dedotdotify(path);
3871 return CURLE_OUT_OF_MEMORY;
3873 if(strcmp(newp, path)) {
3875 free(data->state.pathbuffer);
3876 data->state.pathbuffer = newp;
3877 data->state.path = newp;
3885 * "rebuild_url" means that one or more URL components have been modified so
3886 * we need to generate an updated full version. We need the corrected URL
3887 * when communicating over HTTP proxy and we don't know at this point if
3888 * we're using a proxy or not.
3893 size_t plen = strlen(path); /* new path, should be 1 byte longer than
3895 size_t urllen = strlen(data->change.url); /* original URL length */
3897 size_t prefixlen = strlen(conn->host.name);
3900 prefixlen += strlen(protop) + strlen("://");
3902 reurl = malloc(urllen + 2); /* 2 for zerobyte + slash */
3904 return CURLE_OUT_OF_MEMORY;
3906 /* copy the prefix */
3907 memcpy(reurl, data->change.url, prefixlen);
3909 /* append the trailing piece + zerobyte */
3910 memcpy(&reurl[prefixlen], path, plen + 1);
3912 /* possible free the old one */
3913 if(data->change.url_alloc) {
3914 Curl_safefree(data->change.url);
3915 data->change.url_alloc = FALSE;
3918 infof(data, "Rebuilt URL to: %s\n", reurl);
3920 data->change.url = reurl;
3921 data->change.url_alloc = TRUE; /* free this later */
3925 * Parse the login details from the URL and strip them out of
3928 result = parse_url_login(data, conn, userp, passwdp, optionsp);
3929 if(result != CURLE_OK)
3932 if(conn->host.name[0] == '[') {
3933 /* This looks like an IPv6 address literal. See if there is an address
3935 char *percent = strstr (conn->host.name, "%25");
3938 unsigned long scope = strtoul (percent + 3, &endp, 10);
3940 /* The address scope was well formed. Knock it out of the
3942 memmove(percent, endp, strlen(endp)+1);
3943 if(!data->state.this_is_a_follow)
3944 /* Don't honour a scope given in a Location: header */
3945 conn->scope = (unsigned int)scope;
3948 infof(data, "Invalid IPv6 address format\n");
3953 /* Override any scope that was set above. */
3954 conn->scope = data->set.scope;
3956 /* Remove the fragment part of the path. Per RFC 2396, this is always the
3957 last part of the URI. We are looking for the first '#' so that we deal
3958 gracefully with non conformant URI such as http://example.com#foo#bar. */
3959 fragment = strchr(path, '#');
3963 /* we know the path part ended with a fragment, so we know the full URL
3964 string does too and we need to cut it off from there so it isn't used
3966 fragment = strchr(data->change.url, '#');
3972 * So if the URL was A://B/C#D,
3974 * conn->host.name is B
3975 * data->state.path is /C
3978 return findprotocol(data, conn, protop);
3982 * If we're doing a resumed transfer, we need to setup our stuff
3985 static CURLcode setup_range(struct SessionHandle *data)
3987 struct UrlState *s = &data->state;
3988 s->resume_from = data->set.set_resume_from;
3989 if(s->resume_from || data->set.str[STRING_SET_RANGE]) {
3990 if(s->rangestringalloc)
3994 s->range = aprintf("%" FORMAT_OFF_TU "-", s->resume_from);
3996 s->range = strdup(data->set.str[STRING_SET_RANGE]);
3998 s->rangestringalloc = (s->range)?TRUE:FALSE;
4001 return CURLE_OUT_OF_MEMORY;
4003 /* tell ourselves to fetch this range */
4004 s->use_range = TRUE; /* enable range download */
4007 s->use_range = FALSE; /* disable range download */
4014 * setup_connection_internals() -
4016 * Setup connection internals specific to the requested protocol in the
4017 * SessionHandle. This is inited and setup before the connection is made but
4018 * is about the particular protocol that is to be used.
4020 * This MUST get called after proxy magic has been figured out.
4022 static CURLcode setup_connection_internals(struct connectdata *conn)
4024 const struct Curl_handler * p;
4027 /* in some case in the multi state-machine, we go back to the CONNECT state
4028 and then a second (or third or...) call to this function will be made
4029 without doing a DISCONNECT or DONE in between (since the connection is
4030 yet in place) and therefore this function needs to first make sure
4031 there's no lingering previous data allocated. */
4032 Curl_free_request_state(conn->data);
4034 memset(&conn->data->req, 0, sizeof(struct SingleRequest));
4035 conn->data->req.maxdownload = -1;
4037 conn->socktype = SOCK_STREAM; /* most of them are TCP streams */
4039 /* Perform setup complement if some. */
4042 if(p->setup_connection) {
4043 result = (*p->setup_connection)(conn);
4045 if(result != CURLE_OK)
4048 p = conn->handler; /* May have changed. */
4052 /* we check for -1 here since if proxy was detected already, this
4053 was very likely already set to the proxy port */
4054 conn->port = p->defport;
4056 /* only if remote_port was not already parsed off the URL we use the
4057 default port number */
4058 if(!conn->remote_port)
4059 conn->remote_port = (unsigned short)conn->given->defport;
4065 * Curl_free_request_state() should free temp data that was allocated in the
4066 * SessionHandle for this single request.
4069 void Curl_free_request_state(struct SessionHandle *data)
4071 Curl_safefree(data->req.protop);
4075 #ifndef CURL_DISABLE_PROXY
4076 /****************************************************************
4077 * Checks if the host is in the noproxy list. returns true if it matches
4078 * and therefore the proxy should NOT be used.
4079 ****************************************************************/
4080 static bool check_noproxy(const char* name, const char* no_proxy)
4082 /* no_proxy=domain1.dom,host.domain2.dom
4083 * (a comma-separated list of hosts which should
4084 * not be proxied, or an asterisk to override
4085 * all proxy variables)
4089 const char* separator = ", ";
4090 size_t no_proxy_len;
4094 if(no_proxy && no_proxy[0]) {
4095 if(Curl_raw_equal("*", no_proxy)) {
4099 /* NO_PROXY was specified and it wasn't just an asterisk */
4101 no_proxy_len = strlen(no_proxy);
4102 endptr = strchr(name, ':');
4104 namelen = endptr - name;
4106 namelen = strlen(name);
4108 for(tok_start = 0; tok_start < no_proxy_len; tok_start = tok_end + 1) {
4109 while(tok_start < no_proxy_len &&
4110 strchr(separator, no_proxy[tok_start]) != NULL) {
4111 /* Look for the beginning of the token. */
4115 if(tok_start == no_proxy_len)
4116 break; /* It was all trailing separator chars, no more tokens. */
4118 for(tok_end = tok_start; tok_end < no_proxy_len &&
4119 strchr(separator, no_proxy[tok_end]) == NULL; ++tok_end)
4120 /* Look for the end of the token. */
4123 /* To match previous behaviour, where it was necessary to specify
4124 * ".local.com" to prevent matching "notlocal.com", we will leave
4127 if(no_proxy[tok_start] == '.')
4130 if((tok_end - tok_start) <= namelen) {
4131 /* Match the last part of the name to the domain we are checking. */
4132 const char *checkn = name + namelen - (tok_end - tok_start);
4133 if(Curl_raw_nequal(no_proxy + tok_start, checkn,
4134 tok_end - tok_start)) {
4135 if((tok_end - tok_start) == namelen || *(checkn - 1) == '.') {
4136 /* We either have an exact match, or the previous character is a .
4137 * so it is within the same domain, so no proxy for this host.
4142 } /* if((tok_end - tok_start) <= namelen) */
4143 } /* for(tok_start = 0; tok_start < no_proxy_len;
4144 tok_start = tok_end + 1) */
4145 } /* NO_PROXY was specified and it wasn't just an asterisk */
4150 /****************************************************************
4151 * Detect what (if any) proxy to use. Remember that this selects a host
4152 * name and is not limited to HTTP proxies only.
4153 * The returned pointer must be freed by the caller (unless NULL)
4154 ****************************************************************/
4155 static char *detect_proxy(struct connectdata *conn)
4159 #ifndef CURL_DISABLE_HTTP
4160 /* If proxy was not specified, we check for default proxy environment
4161 * variables, to enable i.e Lynx compliance:
4163 * http_proxy=http://some.server.dom:port/
4164 * https_proxy=http://some.server.dom:port/
4165 * ftp_proxy=http://some.server.dom:port/
4166 * no_proxy=domain1.dom,host.domain2.dom
4167 * (a comma-separated list of hosts which should
4168 * not be proxied, or an asterisk to override
4169 * all proxy variables)
4170 * all_proxy=http://some.server.dom:port/
4171 * (seems to exist for the CERN www lib. Probably
4172 * the first to check for.)
4174 * For compatibility, the all-uppercase versions of these variables are
4175 * checked if the lowercase versions don't exist.
4177 char *no_proxy=NULL;
4178 char proxy_env[128];
4180 no_proxy=curl_getenv("no_proxy");
4182 no_proxy=curl_getenv("NO_PROXY");
4184 if(!check_noproxy(conn->host.name, no_proxy)) {
4185 /* It was not listed as without proxy */
4186 const char *protop = conn->handler->scheme;
4187 char *envp = proxy_env;
4190 /* Now, build <protocol>_proxy and check for such a one to use */
4192 *envp++ = (char)tolower((int)*protop++);
4195 strcpy(envp, "_proxy");
4197 /* read the protocol proxy: */
4198 prox=curl_getenv(proxy_env);
4201 * We don't try the uppercase version of HTTP_PROXY because of
4204 * When curl is used in a webserver application
4205 * environment (cgi or php), this environment variable can
4206 * be controlled by the web server user by setting the
4207 * http header 'Proxy:' to some value.
4209 * This can cause 'internal' http/ftp requests to be
4210 * arbitrarily redirected by any external attacker.
4212 if(!prox && !Curl_raw_equal("http_proxy", proxy_env)) {
4213 /* There was no lowercase variable, try the uppercase version: */
4214 Curl_strntoupper(proxy_env, proxy_env, sizeof(proxy_env));
4215 prox=curl_getenv(proxy_env);
4218 if(prox && *prox) { /* don't count "" strings */
4219 proxy = prox; /* use this */
4222 proxy = curl_getenv("all_proxy"); /* default proxy to use */
4224 proxy=curl_getenv("ALL_PROXY");
4226 } /* if(!check_noproxy(conn->host.name, no_proxy)) - it wasn't specified
4231 #else /* !CURL_DISABLE_HTTP */
4234 #endif /* CURL_DISABLE_HTTP */
4240 * If this is supposed to use a proxy, we need to figure out the proxy
4241 * host name, so that we can re-use an existing connection
4242 * that may exist registered to the same proxy host.
4243 * proxy will be freed before this function returns.
4245 static CURLcode parse_proxy(struct SessionHandle *data,
4246 struct connectdata *conn, char *proxy)
4251 /* We use 'proxyptr' to point to the proxy name from now on... */
4256 /* We do the proxy host string parsing here. We want the host name and the
4257 * port name. Accept a protocol:// prefix
4260 /* Parse the protocol part if present */
4261 endofprot = strstr(proxy, "://");
4263 proxyptr = endofprot+3;
4264 if(checkprefix("socks5h", proxy))
4265 conn->proxytype = CURLPROXY_SOCKS5_HOSTNAME;
4266 else if(checkprefix("socks5", proxy))
4267 conn->proxytype = CURLPROXY_SOCKS5;
4268 else if(checkprefix("socks4a", proxy))
4269 conn->proxytype = CURLPROXY_SOCKS4A;
4270 else if(checkprefix("socks4", proxy) || checkprefix("socks", proxy))
4271 conn->proxytype = CURLPROXY_SOCKS4;
4272 /* Any other xxx:// : change to http proxy */
4275 proxyptr = proxy; /* No xxx:// head: It's a HTTP proxy */
4277 /* Is there a username and password given in this proxy url? */
4278 atsign = strchr(proxyptr, '@');
4280 CURLcode res = CURLE_OK;
4281 char *proxyuser = NULL;
4282 char *proxypasswd = NULL;
4284 res = parse_login_details(proxyptr, atsign - proxyptr,
4285 &proxyuser, &proxypasswd, NULL);
4287 /* found user and password, rip them out. note that we are
4288 unescaping them, as there is otherwise no way to have a
4289 username or password with reserved characters like ':' in
4291 Curl_safefree(conn->proxyuser);
4292 if(proxyuser && strlen(proxyuser) < MAX_CURL_USER_LENGTH)
4293 conn->proxyuser = curl_easy_unescape(data, proxyuser, 0, NULL);
4295 conn->proxyuser = strdup("");
4297 if(!conn->proxyuser)
4298 res = CURLE_OUT_OF_MEMORY;
4300 Curl_safefree(conn->proxypasswd);
4301 if(proxypasswd && strlen(proxypasswd) < MAX_CURL_PASSWORD_LENGTH)
4302 conn->proxypasswd = curl_easy_unescape(data, proxypasswd, 0, NULL);
4304 conn->proxypasswd = strdup("");
4306 if(!conn->proxypasswd)
4307 res = CURLE_OUT_OF_MEMORY;
4311 conn->bits.proxy_user_passwd = TRUE; /* enable it */
4312 atsign++; /* the right side of the @-letter */
4315 proxyptr = atsign; /* now use this instead */
4317 res = CURLE_OUT_OF_MEMORY;
4321 Curl_safefree(proxyuser);
4322 Curl_safefree(proxypasswd);
4328 /* start scanning for port number at this point */
4331 /* detect and extract RFC2732-style IPv6-addresses */
4332 if(*proxyptr == '[') {
4333 char *ptr = ++proxyptr; /* advance beyond the initial bracket */
4334 while(*ptr && (ISXDIGIT(*ptr) || (*ptr == ':') || (*ptr == '%') ||
4338 /* yeps, it ended nicely with a bracket as well */
4341 infof(data, "Invalid IPv6 address format\n");
4343 /* Note that if this didn't end with a bracket, we still advanced the
4344 * proxyptr first, but I can't see anything wrong with that as no host
4345 * name nor a numeric can legally start with a bracket.
4349 /* Get port number off proxy.server.com:1080 */
4350 prox_portno = strchr(portptr, ':');
4352 *prox_portno = 0x0; /* cut off number from host name */
4354 /* now set the local port number */
4355 conn->port = strtol(prox_portno, NULL, 10);
4358 if(proxyptr[0]=='/')
4359 /* If the first character in the proxy string is a slash, fail
4360 immediately. The following code will otherwise clear the string which
4361 will lead to code running as if no proxy was set! */
4362 return CURLE_COULDNT_RESOLVE_PROXY;
4364 /* without a port number after the host name, some people seem to use
4365 a slash so we strip everything from the first slash */
4366 atsign = strchr(proxyptr, '/');
4368 *atsign = 0x0; /* cut off path part from host name */
4370 if(data->set.proxyport)
4371 /* None given in the proxy string, then get the default one if it is
4373 conn->port = data->set.proxyport;
4376 /* now, clone the cleaned proxy host name */
4377 conn->proxy.rawalloc = strdup(proxyptr);
4378 conn->proxy.name = conn->proxy.rawalloc;
4380 if(!conn->proxy.rawalloc)
4381 return CURLE_OUT_OF_MEMORY;
4387 * Extract the user and password from the authentication string
4389 static CURLcode parse_proxy_auth(struct SessionHandle *data,
4390 struct connectdata *conn)
4392 char proxyuser[MAX_CURL_USER_LENGTH]="";
4393 char proxypasswd[MAX_CURL_PASSWORD_LENGTH]="";
4395 if(data->set.str[STRING_PROXYUSERNAME] != NULL) {
4396 strncpy(proxyuser, data->set.str[STRING_PROXYUSERNAME],
4397 MAX_CURL_USER_LENGTH);
4398 proxyuser[MAX_CURL_USER_LENGTH-1] = '\0'; /*To be on safe side*/
4400 if(data->set.str[STRING_PROXYPASSWORD] != NULL) {
4401 strncpy(proxypasswd, data->set.str[STRING_PROXYPASSWORD],
4402 MAX_CURL_PASSWORD_LENGTH);
4403 proxypasswd[MAX_CURL_PASSWORD_LENGTH-1] = '\0'; /*To be on safe side*/
4406 conn->proxyuser = curl_easy_unescape(data, proxyuser, 0, NULL);
4407 if(!conn->proxyuser)
4408 return CURLE_OUT_OF_MEMORY;
4410 conn->proxypasswd = curl_easy_unescape(data, proxypasswd, 0, NULL);
4411 if(!conn->proxypasswd)
4412 return CURLE_OUT_OF_MEMORY;
4416 #endif /* CURL_DISABLE_PROXY */
4421 * Parse the login details (user name, password and options) from the URL and
4422 * strip them out of the host name
4424 * Inputs: data->set.use_netrc (CURLOPT_NETRC)
4427 * Outputs: (almost :- all currently undefined)
4428 * conn->bits.user_passwd - non-zero if non-default passwords exist
4429 * user - non-zero length if defined
4430 * passwd - non-zero length if defined
4431 * options - non-zero length if defined
4432 * conn->host.name - remove user name and password
4434 static CURLcode parse_url_login(struct SessionHandle *data,
4435 struct connectdata *conn,
4436 char **user, char **passwd, char **options)
4438 CURLcode result = CURLE_OK;
4440 char *passwdp = NULL;
4441 char *optionsp = NULL;
4443 /* At this point, we're hoping all the other special cases have
4444 * been taken care of, so conn->host.name is at most
4445 * [user[:password][;options]]@]hostname
4447 * We need somewhere to put the embedded details, so do that first.
4450 char *ptr = strchr(conn->host.name, '@');
4451 char *login = conn->host.name;
4453 DEBUGASSERT(!**user);
4454 DEBUGASSERT(!**passwd);
4455 DEBUGASSERT(!**options);
4460 /* We will now try to extract the
4461 * possible login information in a string like:
4462 * ftp://user:password@ftp.my.site:8021/README */
4463 conn->host.name = ++ptr;
4465 /* So the hostname is sane. Only bother interpreting the
4466 * results if we could care. It could still be wasted
4467 * work because it might be overtaken by the programmatically
4468 * set user/passwd, but doing that first adds more cases here :-(
4471 if(data->set.use_netrc == CURL_NETRC_REQUIRED)
4474 /* We could use the login information in the URL so extract it */
4475 result = parse_login_details(login, ptr - login - 1,
4476 &userp, &passwdp, &optionsp);
4477 if(result != CURLE_OK)
4483 /* We have a user in the URL */
4484 conn->bits.userpwd_in_url = TRUE;
4485 conn->bits.user_passwd = TRUE; /* enable user+password */
4487 /* Decode the user */
4488 newname = curl_easy_unescape(data, userp, 0, NULL);
4490 result = CURLE_OUT_OF_MEMORY;
4499 /* We have a password in the URL so decode it */
4500 char *newpasswd = curl_easy_unescape(data, passwdp, 0, NULL);
4502 result = CURLE_OUT_OF_MEMORY;
4507 *passwd = newpasswd;
4511 /* We have an options list in the URL so decode it */
4512 char *newoptions = curl_easy_unescape(data, optionsp, 0, NULL);
4514 result = CURLE_OUT_OF_MEMORY;
4519 *options = newoptions;
4525 Curl_safefree(userp);
4526 Curl_safefree(passwdp);
4527 Curl_safefree(optionsp);
4533 * parse_login_details()
4535 * This is used to parse a login string for user name, password and options in
4536 * the following formats:
4540 * user:password;options
4542 * user;options:password
4550 * login [in] - The login string.
4551 * len [in] - The length of the login string.
4552 * userp [in/out] - The address where a pointer to newly allocated memory
4553 * holding the user will be stored upon completion.
4554 * passdwp [in/out] - The address where a pointer to newly allocated memory
4555 * holding the password will be stored upon completion.
4556 * optionsp [in/out] - The address where a pointer to newly allocated memory
4557 * holding the options will be stored upon completion.
4559 * Returns CURLE_OK on success.
4561 static CURLcode parse_login_details(const char *login, const size_t len,
4562 char **userp, char **passwdp,
4565 CURLcode result = CURLE_OK;
4569 const char *psep = NULL;
4570 const char *osep = NULL;
4575 /* Attempt to find the password separator */
4577 psep = strchr(login, ':');
4579 /* Within the constraint of the login string */
4580 if(psep >= login + len)
4584 /* Attempt to find the options separator */
4586 osep = strchr(login, ';');
4588 /* Within the constraint of the login string */
4589 if(osep >= login + len)
4593 /* Calculate the portion lengths */
4595 (size_t)(osep && psep > osep ? osep - login : psep - login) :
4596 (osep ? (size_t)(osep - login) : len));
4598 (osep && osep > psep ? (size_t)(osep - psep) :
4599 (size_t)(login + len - psep)) - 1 : 0);
4601 (psep && psep > osep ? (size_t)(psep - osep) :
4602 (size_t)(login + len - osep)) - 1 : 0);
4604 /* Allocate the user portion buffer */
4606 ubuf = malloc(ulen + 1);
4608 result = CURLE_OUT_OF_MEMORY;
4611 /* Allocate the password portion buffer */
4612 if(!result && passwdp && plen) {
4613 pbuf = malloc(plen + 1);
4615 Curl_safefree(ubuf);
4616 result = CURLE_OUT_OF_MEMORY;
4620 /* Allocate the options portion buffer */
4621 if(!result && optionsp && olen) {
4622 obuf = malloc(olen + 1);
4624 Curl_safefree(pbuf);
4625 Curl_safefree(ubuf);
4626 result = CURLE_OUT_OF_MEMORY;
4631 /* Store the user portion if necessary */
4633 memcpy(ubuf, login, ulen);
4635 Curl_safefree(*userp);
4639 /* Store the password portion if necessary */
4641 memcpy(pbuf, psep + 1, plen);
4643 Curl_safefree(*passwdp);
4647 /* Store the options portion if necessary */
4649 memcpy(obuf, osep + 1, olen);
4651 Curl_safefree(*optionsp);
4659 /*************************************************************
4660 * Figure out the remote port number and fix it in the URL
4662 * No matter if we use a proxy or not, we have to figure out the remote
4663 * port number of various reasons.
4665 * To be able to detect port number flawlessly, we must not confuse them
4666 * IPv6-specified addresses in the [0::1] style. (RFC2732)
4668 * The conn->host.name is currently [user:passwd@]host[:port] where host
4669 * could be a hostname, IPv4 address or IPv6 address.
4671 * The port number embedded in the URL is replaced, if necessary.
4672 *************************************************************/
4673 static CURLcode parse_remote_port(struct SessionHandle *data,
4674 struct connectdata *conn)
4679 /* Note that at this point, the IPv6 address cannot contain any scope
4680 suffix as that has already been removed in the parseurlandfillconn()
4682 if((1 == sscanf(conn->host.name, "[%*45[0123456789abcdefABCDEF:.]%c",
4684 (']' == endbracket)) {
4685 /* this is a RFC2732-style specified IP-address */
4686 conn->bits.ipv6_ip = TRUE;
4688 conn->host.name++; /* skip over the starting bracket */
4689 portptr = strchr(conn->host.name, ']');
4691 *portptr++ = '\0'; /* zero terminate, killing the bracket */
4693 portptr = NULL; /* no port number available */
4698 struct in6_addr in6;
4699 if(Curl_inet_pton(AF_INET6, conn->host.name, &in6) > 0) {
4700 /* This is a numerical IPv6 address, meaning this is a wrongly formatted
4702 failf(data, "IPv6 numerical address used in URL without brackets");
4703 return CURLE_URL_MALFORMAT;
4707 portptr = strrchr(conn->host.name, ':');
4710 if(data->set.use_port && data->state.allow_port) {
4711 /* if set, we use this and ignore the port possibly given in the URL */
4712 conn->remote_port = (unsigned short)data->set.use_port;
4714 *portptr = '\0'; /* cut off the name there anyway - if there was a port
4715 number - since the port number is to be ignored! */
4716 if(conn->bits.httpproxy) {
4717 /* we need to create new URL with the new port number */
4721 if(conn->bits.type_set)
4722 snprintf(type, sizeof(type), ";type=%c",
4723 data->set.prefer_ascii?'A':
4724 (data->set.ftp_list_only?'D':'I'));
4727 * This synthesized URL isn't always right--suffixes like ;type=A are
4728 * stripped off. It would be better to work directly from the original
4729 * URL and simply replace the port part of it.
4731 url = aprintf("%s://%s%s%s:%hu%s%s%s", conn->given->scheme,
4732 conn->bits.ipv6_ip?"[":"", conn->host.name,
4733 conn->bits.ipv6_ip?"]":"", conn->remote_port,
4734 data->state.slash_removed?"/":"", data->state.path,
4737 return CURLE_OUT_OF_MEMORY;
4739 if(data->change.url_alloc) {
4740 Curl_safefree(data->change.url);
4741 data->change.url_alloc = FALSE;
4744 data->change.url = url;
4745 data->change.url_alloc = TRUE;
4749 /* no CURLOPT_PORT given, extract the one from the URL */
4754 port=strtoul(portptr+1, &rest, 10); /* Port number must be decimal */
4756 if(rest != (portptr+1) && *rest == '\0') {
4757 /* The colon really did have only digits after it,
4758 * so it is either a port number or a mistake */
4760 if(port > 0xffff) { /* Single unix standard says port numbers are
4762 failf(data, "Port number too large: %lu", port);
4763 return CURLE_URL_MALFORMAT;
4766 *portptr = '\0'; /* cut off the name there */
4767 conn->remote_port = curlx_ultous(port);
4770 /* Browser behavior adaptation. If there's a colon with no digits after,
4771 just cut off the name there which makes us ignore the colon and just
4772 use the default port. Firefox and Chrome both do that. */
4779 * Override the login details from the URL with that in the CURLOPT_USERPWD
4780 * option or a .netrc file, if applicable.
4782 static CURLcode override_login(struct SessionHandle *data,
4783 struct connectdata *conn,
4784 char **userp, char **passwdp, char **optionsp)
4786 if(data->set.str[STRING_USERNAME]) {
4788 *userp = strdup(data->set.str[STRING_USERNAME]);
4790 return CURLE_OUT_OF_MEMORY;
4793 if(data->set.str[STRING_PASSWORD]) {
4795 *passwdp = strdup(data->set.str[STRING_PASSWORD]);
4797 return CURLE_OUT_OF_MEMORY;
4800 if(data->set.str[STRING_OPTIONS]) {
4802 *optionsp = strdup(data->set.str[STRING_OPTIONS]);
4804 return CURLE_OUT_OF_MEMORY;
4807 conn->bits.netrc = FALSE;
4808 if(data->set.use_netrc != CURL_NETRC_IGNORED) {
4809 if(Curl_parsenetrc(conn->host.name,
4811 data->set.str[STRING_NETRC_FILE])) {
4812 infof(data, "Couldn't find host %s in the "
4813 DOT_CHAR "netrc file; using defaults\n",
4817 /* set bits.netrc TRUE to remember that we got the name from a .netrc
4818 file, so that it is safe to use even if we followed a Location: to a
4819 different host or similar. */
4820 conn->bits.netrc = TRUE;
4822 conn->bits.user_passwd = TRUE; /* enable user+password */
4830 * Set the login details so they're available in the connection
4832 static CURLcode set_login(struct connectdata *conn,
4833 const char *user, const char *passwd,
4834 const char *options)
4836 CURLcode result = CURLE_OK;
4838 /* If our protocol needs a password and we have none, use the defaults */
4839 if((conn->handler->flags & PROTOPT_NEEDSPWD) && !conn->bits.user_passwd) {
4840 /* Store the default user */
4841 conn->user = strdup(CURL_DEFAULT_USER);
4843 /* Store the default password */
4845 conn->passwd = strdup(CURL_DEFAULT_PASSWORD);
4847 conn->passwd = NULL;
4849 /* This is the default password, so DON'T set conn->bits.user_passwd */
4852 /* Store the user, zero-length if not set */
4853 conn->user = strdup(user);
4855 /* Store the password (only if user is present), zero-length if not set */
4857 conn->passwd = strdup(passwd);
4859 conn->passwd = NULL;
4862 if(!conn->user || !conn->passwd)
4863 result = CURLE_OUT_OF_MEMORY;
4865 /* Store the options, null if not set */
4866 if(!result && options[0]) {
4867 conn->options = strdup(options);
4870 result = CURLE_OUT_OF_MEMORY;
4876 /*************************************************************
4877 * Resolve the address of the server or proxy
4878 *************************************************************/
4879 static CURLcode resolve_server(struct SessionHandle *data,
4880 struct connectdata *conn,
4883 CURLcode result=CURLE_OK;
4884 long timeout_ms = Curl_timeleft(data, NULL, TRUE);
4886 /*************************************************************
4887 * Resolve the name of the server or proxy
4888 *************************************************************/
4889 if(conn->bits.reuse)
4890 /* We're reusing the connection - no need to resolve anything, and
4891 fix_hostname() was called already in create_conn() for the re-use
4896 /* this is a fresh connect */
4898 struct Curl_dns_entry *hostaddr;
4900 /* set a pointer to the hostname we display */
4901 fix_hostname(data, conn, &conn->host);
4903 if(!conn->proxy.name || !*conn->proxy.name) {
4904 /* If not connecting via a proxy, extract the port from the URL, if it is
4905 * there, thus overriding any defaults that might have been set above. */
4906 conn->port = conn->remote_port; /* it is the same port */
4908 /* Resolve target host right on */
4909 rc = Curl_resolv_timeout(conn, conn->host.name, (int)conn->port,
4910 &hostaddr, timeout_ms);
4911 if(rc == CURLRESOLV_PENDING)
4914 else if(rc == CURLRESOLV_TIMEDOUT)
4915 result = CURLE_OPERATION_TIMEDOUT;
4917 else if(!hostaddr) {
4918 failf(data, "Couldn't resolve host '%s'", conn->host.dispname);
4919 result = CURLE_COULDNT_RESOLVE_HOST;
4920 /* don't return yet, we need to clean up the timeout first */
4924 /* This is a proxy that hasn't been resolved yet. */
4926 /* IDN-fix the proxy name */
4927 fix_hostname(data, conn, &conn->proxy);
4930 rc = Curl_resolv_timeout(conn, conn->proxy.name, (int)conn->port,
4931 &hostaddr, timeout_ms);
4933 if(rc == CURLRESOLV_PENDING)
4936 else if(rc == CURLRESOLV_TIMEDOUT)
4937 result = CURLE_OPERATION_TIMEDOUT;
4939 else if(!hostaddr) {
4940 failf(data, "Couldn't resolve proxy '%s'", conn->proxy.dispname);
4941 result = CURLE_COULDNT_RESOLVE_PROXY;
4942 /* don't return yet, we need to clean up the timeout first */
4945 DEBUGASSERT(conn->dns_entry == NULL);
4946 conn->dns_entry = hostaddr;
4953 * Cleanup the connection just allocated before we can move along and use the
4954 * previously existing one. All relevant data is copied over and old_conn is
4955 * ready for freeing once this function returns.
4957 static void reuse_conn(struct connectdata *old_conn,
4958 struct connectdata *conn)
4960 if(old_conn->proxy.rawalloc)
4961 free(old_conn->proxy.rawalloc);
4963 /* free the SSL config struct from this connection struct as this was
4964 allocated in vain and is targeted for destruction */
4965 Curl_free_ssl_config(&old_conn->ssl_config);
4967 conn->data = old_conn->data;
4969 /* get the user+password information from the old_conn struct since it may
4970 * be new for this request even when we re-use an existing connection */
4971 conn->bits.user_passwd = old_conn->bits.user_passwd;
4972 if(conn->bits.user_passwd) {
4973 /* use the new user name and password though */
4974 Curl_safefree(conn->user);
4975 Curl_safefree(conn->passwd);
4976 conn->user = old_conn->user;
4977 conn->passwd = old_conn->passwd;
4978 old_conn->user = NULL;
4979 old_conn->passwd = NULL;
4982 conn->bits.proxy_user_passwd = old_conn->bits.proxy_user_passwd;
4983 if(conn->bits.proxy_user_passwd) {
4984 /* use the new proxy user name and proxy password though */
4985 Curl_safefree(conn->proxyuser);
4986 Curl_safefree(conn->proxypasswd);
4987 conn->proxyuser = old_conn->proxyuser;
4988 conn->proxypasswd = old_conn->proxypasswd;
4989 old_conn->proxyuser = NULL;
4990 old_conn->proxypasswd = NULL;
4993 /* host can change, when doing keepalive with a proxy or if the case is
4994 different this time etc */
4995 Curl_safefree(conn->host.rawalloc);
4996 conn->host=old_conn->host;
4998 /* persist connection info in session handle */
4999 Curl_persistconninfo(conn);
5002 conn->bits.reuse = TRUE; /* yes, we're re-using here */
5004 Curl_safefree(old_conn->user);
5005 Curl_safefree(old_conn->passwd);
5006 Curl_safefree(old_conn->proxyuser);
5007 Curl_safefree(old_conn->proxypasswd);
5008 Curl_safefree(old_conn->localdev);
5010 Curl_llist_destroy(old_conn->send_pipe, NULL);
5011 Curl_llist_destroy(old_conn->recv_pipe, NULL);
5013 old_conn->send_pipe = NULL;
5014 old_conn->recv_pipe = NULL;
5016 Curl_safefree(old_conn->master_buffer);
5020 * create_conn() sets up a new connectdata struct, or re-uses an already
5021 * existing one, and resolves host name.
5023 * if this function returns CURLE_OK and *async is set to TRUE, the resolve
5024 * response will be coming asynchronously. If *async is FALSE, the name is
5027 * @param data The sessionhandle pointer
5028 * @param in_connect is set to the next connection data pointer
5029 * @param async is set TRUE when an async DNS resolution is pending
5030 * @see Curl_setup_conn()
5032 * *NOTE* this function assigns the conn->data pointer!
5035 static CURLcode create_conn(struct SessionHandle *data,
5036 struct connectdata **in_connect,
5039 CURLcode result = CURLE_OK;
5040 struct connectdata *conn;
5041 struct connectdata *conn_temp = NULL;
5044 char *passwd = NULL;
5045 char *options = NULL;
5048 bool prot_missing = FALSE;
5049 bool no_connections_available = FALSE;
5051 size_t max_host_connections = Curl_multi_max_host_connections(data->multi);
5052 size_t max_total_connections = Curl_multi_max_total_connections(data->multi);
5056 /*************************************************************
5058 *************************************************************/
5060 if(!data->change.url) {
5061 result = CURLE_URL_MALFORMAT;
5065 /* First, split up the current URL in parts so that we can use the
5066 parts for checking against the already present connections. In order
5067 to not have to modify everything at once, we allocate a temporary
5068 connection data struct and fill in for comparison purposes. */
5069 conn = allocate_conn(data);
5072 result = CURLE_OUT_OF_MEMORY;
5076 /* We must set the return variable as soon as possible, so that our
5077 parent can cleanup any possible allocs we may have done before
5081 /* This initing continues below, see the comment "Continue connectdata
5082 * initialization here" */
5084 /***********************************************************
5085 * We need to allocate memory to store the path in. We get the size of the
5086 * full URL to be sure, and we need to make it at least 256 bytes since
5087 * other parts of the code will rely on this fact
5088 ***********************************************************/
5089 #define LEAST_PATH_ALLOC 256
5090 urllen=strlen(data->change.url);
5091 if(urllen < LEAST_PATH_ALLOC)
5092 urllen=LEAST_PATH_ALLOC;
5095 * We malloc() the buffers below urllen+2 to make room for 2 possibilities:
5096 * 1 - an extra terminating zero
5097 * 2 - an extra slash (in case a syntax like "www.host.com?moo" is used)
5100 Curl_safefree(data->state.pathbuffer);
5101 data->state.path = NULL;
5103 data->state.pathbuffer = malloc(urllen+2);
5104 if(NULL == data->state.pathbuffer) {
5105 result = CURLE_OUT_OF_MEMORY; /* really bad error */
5108 data->state.path = data->state.pathbuffer;
5110 conn->host.rawalloc = malloc(urllen+2);
5111 if(NULL == conn->host.rawalloc) {
5112 Curl_safefree(data->state.pathbuffer);
5113 data->state.path = NULL;
5114 result = CURLE_OUT_OF_MEMORY;
5118 conn->host.name = conn->host.rawalloc;
5119 conn->host.name[0] = 0;
5122 passwd = strdup("");
5123 options = strdup("");
5124 if(!user || !passwd || !options) {
5125 result = CURLE_OUT_OF_MEMORY;
5129 result = parseurlandfillconn(data, conn, &prot_missing, &user, &passwd,
5131 if(result != CURLE_OK)
5134 /*************************************************************
5135 * No protocol part in URL was used, add it!
5136 *************************************************************/
5138 /* We're guessing prefixes here and if we're told to use a proxy or if
5139 we're gonna follow a Location: later or... then we need the protocol
5140 part added so that we have a valid URL. */
5143 reurl = aprintf("%s://%s", conn->handler->scheme, data->change.url);
5146 result = CURLE_OUT_OF_MEMORY;
5150 if(data->change.url_alloc) {
5151 Curl_safefree(data->change.url);
5152 data->change.url_alloc = FALSE;
5155 data->change.url = reurl;
5156 data->change.url_alloc = TRUE; /* free this later */
5159 /*************************************************************
5160 * If the protocol can't handle url query strings, then cut
5161 * of the unhandable part
5162 *************************************************************/
5163 if((conn->given->flags&PROTOPT_NOURLQUERY)) {
5164 char *path_q_sep = strchr(conn->data->state.path, '?');
5166 /* according to rfc3986, allow the query (?foo=bar)
5167 also on protocols that can't handle it.
5169 cut the string-part after '?'
5172 /* terminate the string */
5177 if(data->set.str[STRING_BEARER]) {
5178 conn->xoauth2_bearer = strdup(data->set.str[STRING_BEARER]);
5179 if(!conn->xoauth2_bearer) {
5180 return CURLE_OUT_OF_MEMORY;
5184 #ifndef CURL_DISABLE_PROXY
5185 /*************************************************************
5186 * Extract the user and password from the authentication string
5187 *************************************************************/
5188 if(conn->bits.proxy_user_passwd) {
5189 result = parse_proxy_auth(data, conn);
5190 if(result != CURLE_OK)
5194 /*************************************************************
5195 * Detect what (if any) proxy to use
5196 *************************************************************/
5197 if(data->set.str[STRING_PROXY]) {
5198 proxy = strdup(data->set.str[STRING_PROXY]);
5199 /* if global proxy is set, this is it */
5201 failf(data, "memory shortage");
5202 result = CURLE_OUT_OF_MEMORY;
5207 if(data->set.str[STRING_NOPROXY] &&
5208 check_noproxy(conn->host.name, data->set.str[STRING_NOPROXY])) {
5210 free(proxy); /* proxy is in exception list */
5215 proxy = detect_proxy(conn);
5217 if(proxy && (!*proxy || (conn->handler->flags & PROTOPT_NONETWORK))) {
5218 free(proxy); /* Don't bother with an empty proxy string or if the
5219 protocol doesn't work with network */
5223 /***********************************************************************
5224 * If this is supposed to use a proxy, we need to figure out the proxy host
5225 * name, proxy type and port number, so that we can re-use an existing
5226 * connection that may exist registered to the same proxy host.
5227 ***********************************************************************/
5229 result = parse_proxy(data, conn, proxy);
5231 Curl_safefree(proxy); /* parse_proxy copies the proxy string */
5236 if((conn->proxytype == CURLPROXY_HTTP) ||
5237 (conn->proxytype == CURLPROXY_HTTP_1_0)) {
5238 #ifdef CURL_DISABLE_HTTP
5239 /* asking for a HTTP proxy is a bit funny when HTTP is disabled... */
5240 result = CURLE_UNSUPPORTED_PROTOCOL;
5243 /* force this connection's protocol to become HTTP if not already
5244 compatible - if it isn't tunneling through */
5245 if(!(conn->handler->protocol & CURLPROTO_HTTP) &&
5246 !conn->bits.tunnel_proxy)
5247 conn->handler = &Curl_handler_http;
5249 conn->bits.httpproxy = TRUE;
5253 conn->bits.httpproxy = FALSE; /* not a HTTP proxy */
5254 conn->bits.proxy = TRUE;
5257 /* we aren't using the proxy after all... */
5258 conn->bits.proxy = FALSE;
5259 conn->bits.httpproxy = FALSE;
5260 conn->bits.proxy_user_passwd = FALSE;
5261 conn->bits.tunnel_proxy = FALSE;
5264 #endif /* CURL_DISABLE_PROXY */
5266 /*************************************************************
5267 * If the protocol is using SSL and HTTP proxy is used, we set
5268 * the tunnel_proxy bit.
5269 *************************************************************/
5270 if((conn->given->flags&PROTOPT_SSL) && conn->bits.httpproxy)
5271 conn->bits.tunnel_proxy = TRUE;
5273 /*************************************************************
5274 * Figure out the remote port number and fix it in the URL
5275 *************************************************************/
5276 result = parse_remote_port(data, conn);
5277 if(result != CURLE_OK)
5280 /* Check for overridden login details and set them accordingly so they
5281 they are known when protocol->setup_connection is called! */
5282 result = override_login(data, conn, &user, &passwd, &options);
5283 if(result != CURLE_OK)
5285 result = set_login(conn, user, passwd, options);
5286 if(result != CURLE_OK)
5289 /*************************************************************
5290 * Setup internals depending on protocol. Needs to be done after
5291 * we figured out what/if proxy to use.
5292 *************************************************************/
5293 result = setup_connection_internals(conn);
5294 if(result != CURLE_OK)
5297 conn->recv[FIRSTSOCKET] = Curl_recv_plain;
5298 conn->send[FIRSTSOCKET] = Curl_send_plain;
5299 conn->recv[SECONDARYSOCKET] = Curl_recv_plain;
5300 conn->send[SECONDARYSOCKET] = Curl_send_plain;
5302 /***********************************************************************
5303 * file: is a special case in that it doesn't need a network connection
5304 ***********************************************************************/
5305 #ifndef CURL_DISABLE_FILE
5306 if(conn->handler->flags & PROTOPT_NONETWORK) {
5308 /* this is supposed to be the connect function so we better at least check
5309 that the file is present here! */
5310 DEBUGASSERT(conn->handler->connect_it);
5311 result = conn->handler->connect_it(conn, &done);
5313 /* Setup a "faked" transfer that'll do nothing */
5314 if(CURLE_OK == result) {
5316 conn->bits.tcpconnect[FIRSTSOCKET] = TRUE; /* we are "connected */
5318 ConnectionStore(data, conn);
5321 * Setup whatever necessary for a resumed transfer
5323 result = setup_range(data);
5325 DEBUGASSERT(conn->handler->done);
5326 /* we ignore the return code for the protocol-specific DONE */
5327 (void)conn->handler->done(conn, result, FALSE);
5331 Curl_setup_transfer(conn, -1, -1, FALSE, NULL, /* no download */
5332 -1, NULL); /* no upload */
5335 /* since we skip do_init() */
5342 /* Get a cloned copy of the SSL config situation stored in the
5343 connection struct. But to get this going nicely, we must first make
5344 sure that the strings in the master copy are pointing to the correct
5345 strings in the session handle strings array!
5347 Keep in mind that the pointers in the master copy are pointing to strings
5348 that will be freed as part of the SessionHandle struct, but all cloned
5349 copies will be separately allocated.
5351 data->set.ssl.CApath = data->set.str[STRING_SSL_CAPATH];
5352 data->set.ssl.CAfile = data->set.str[STRING_SSL_CAFILE];
5353 data->set.ssl.CRLfile = data->set.str[STRING_SSL_CRLFILE];
5354 data->set.ssl.issuercert = data->set.str[STRING_SSL_ISSUERCERT];
5355 data->set.ssl.random_file = data->set.str[STRING_SSL_RANDOM_FILE];
5356 data->set.ssl.egdsocket = data->set.str[STRING_SSL_EGDSOCKET];
5357 data->set.ssl.cipher_list = data->set.str[STRING_SSL_CIPHER_LIST];
5359 data->set.ssl.username = data->set.str[STRING_TLSAUTH_USERNAME];
5360 data->set.ssl.password = data->set.str[STRING_TLSAUTH_PASSWORD];
5363 if(!Curl_clone_ssl_config(&data->set.ssl, &conn->ssl_config)) {
5364 result = CURLE_OUT_OF_MEMORY;
5368 /*************************************************************
5369 * Check the current list of connections to see if we can
5370 * re-use an already existing one or if we have to create a
5372 *************************************************************/
5374 /* reuse_fresh is TRUE if we are told to use a new connection by force, but
5375 we only acknowledge this option if this is not a re-used connection
5376 already (which happens due to follow-location or during a HTTP
5377 authentication phase). */
5378 if(data->set.reuse_fresh && !data->state.this_is_a_follow)
5381 reuse = ConnectionExists(data, conn, &conn_temp, &force_reuse);
5383 /* If we found a reusable connection, we may still want to
5384 open a new connection if we are pipelining. */
5385 if(reuse && !force_reuse && IsPipeliningPossible(data, conn_temp)) {
5386 size_t pipelen = conn_temp->send_pipe->size + conn_temp->recv_pipe->size;
5388 infof(data, "Found connection %ld, with requests in the pipe (%zu)\n",
5389 conn_temp->connection_id, pipelen);
5391 if(conn_temp->bundle->num_connections < max_host_connections &&
5392 data->state.conn_cache->num_connections < max_total_connections) {
5393 /* We want a new connection anyway */
5396 infof(data, "We can reuse, but we want a new connection anyway\n");
5403 * We already have a connection for this, we got the former connection
5404 * in the conn_temp variable and thus we need to cleanup the one we
5405 * just allocated before we can move along and use the previously
5408 conn_temp->inuse = TRUE; /* mark this as being in use so that no other
5409 handle in a multi stack may nick it */
5410 reuse_conn(conn, conn_temp);
5411 free(conn); /* we don't need this anymore */
5415 /* set a pointer to the hostname we display */
5416 fix_hostname(data, conn, &conn->host);
5418 infof(data, "Re-using existing connection! (#%ld) with host %s\n",
5419 conn->connection_id,
5420 conn->proxy.name?conn->proxy.dispname:conn->host.dispname);
5423 /* We have decided that we want a new connection. However, we may not
5424 be able to do that if we have reached the limit of how many
5425 connections we are allowed to open. */
5426 struct connectbundle *bundle;
5428 bundle = Curl_conncache_find_bundle(data->state.conn_cache,
5430 if(max_host_connections > 0 && bundle &&
5431 (bundle->num_connections >= max_host_connections)) {
5432 struct connectdata *conn_candidate;
5434 /* The bundle is full. Let's see if we can kill a connection. */
5435 conn_candidate = find_oldest_idle_connection_in_bundle(data, bundle);
5437 if(conn_candidate) {
5438 /* Set the connection's owner correctly, then kill it */
5439 conn_candidate->data = data;
5440 (void)Curl_disconnect(conn_candidate, /* dead_connection */ FALSE);
5443 no_connections_available = TRUE;
5446 if(max_total_connections > 0 &&
5447 (data->state.conn_cache->num_connections >= max_total_connections)) {
5448 struct connectdata *conn_candidate;
5450 /* The cache is full. Let's see if we can kill a connection. */
5451 conn_candidate = find_oldest_idle_connection(data);
5453 if(conn_candidate) {
5454 /* Set the connection's owner correctly, then kill it */
5455 conn_candidate->data = data;
5456 (void)Curl_disconnect(conn_candidate, /* dead_connection */ FALSE);
5459 no_connections_available = TRUE;
5463 if(no_connections_available) {
5464 infof(data, "No connections available.\n");
5469 result = CURLE_NO_CONNECTION_AVAILABLE;
5474 * This is a brand new connection, so let's store it in the connection
5477 ConnectionStore(data, conn);
5481 /* Mark the connection as used */
5484 /* Setup and init stuff before DO starts, in preparing for the transfer. */
5488 * Setup whatever necessary for a resumed transfer
5490 result = setup_range(data);
5494 /* Continue connectdata initialization here. */
5497 * Inherit the proper values from the urldata struct AFTER we have arranged
5498 * the persistent connection stuff
5500 conn->fread_func = data->set.fread_func;
5501 conn->fread_in = data->set.in;
5502 conn->seek_func = data->set.seek_func;
5503 conn->seek_client = data->set.seek_client;
5505 /*************************************************************
5506 * Resolve the address of the server or proxy
5507 *************************************************************/
5508 result = resolve_server(data, conn, async);
5512 Curl_safefree(options);
5513 Curl_safefree(passwd);
5514 Curl_safefree(user);
5515 Curl_safefree(proxy);
5519 /* Curl_setup_conn() is called after the name resolve initiated in
5520 * create_conn() is all done.
5522 * Curl_setup_conn() also handles reused connections
5524 * conn->data MUST already have been setup fine (in create_conn)
5527 CURLcode Curl_setup_conn(struct connectdata *conn,
5528 bool *protocol_done)
5530 CURLcode result = CURLE_OK;
5531 struct SessionHandle *data = conn->data;
5533 Curl_pgrsTime(data, TIMER_NAMELOOKUP);
5535 if(conn->handler->flags & PROTOPT_NONETWORK) {
5536 /* nothing to setup when not using a network */
5537 *protocol_done = TRUE;
5540 *protocol_done = FALSE; /* default to not done */
5542 /* set proxy_connect_closed to false unconditionally already here since it
5543 is used strictly to provide extra information to a parent function in the
5544 case of proxy CONNECT failures and we must make sure we don't have it
5545 lingering set from a previous invoke */
5546 conn->bits.proxy_connect_closed = FALSE;
5549 * Set user-agent. Used for HTTP, but since we can attempt to tunnel
5550 * basically anything through a http proxy we can't limit this based on
5553 if(data->set.str[STRING_USERAGENT]) {
5554 Curl_safefree(conn->allocptr.uagent);
5555 conn->allocptr.uagent =
5556 aprintf("User-Agent: %s\r\n", data->set.str[STRING_USERAGENT]);
5557 if(!conn->allocptr.uagent)
5558 return CURLE_OUT_OF_MEMORY;
5561 data->req.headerbytecount = 0;
5563 #ifdef CURL_DO_LINEEND_CONV
5564 data->state.crlf_conversions = 0; /* reset CRLF conversion counter */
5565 #endif /* CURL_DO_LINEEND_CONV */
5567 /* set start time here for timeout purposes in the connect procedure, it
5568 is later set again for the progress meter purpose */
5569 conn->now = Curl_tvnow();
5571 if(CURL_SOCKET_BAD == conn->sock[FIRSTSOCKET]) {
5572 conn->bits.tcpconnect[FIRSTSOCKET] = FALSE;
5573 result = Curl_connecthost(conn, conn->dns_entry);
5578 Curl_pgrsTime(data, TIMER_CONNECT); /* we're connected already */
5579 Curl_pgrsTime(data, TIMER_APPCONNECT); /* we're connected already */
5580 conn->bits.tcpconnect[FIRSTSOCKET] = TRUE;
5581 *protocol_done = TRUE;
5582 Curl_updateconninfo(conn, conn->sock[FIRSTSOCKET]);
5583 Curl_verboseconnect(conn);
5586 conn->now = Curl_tvnow(); /* time this *after* the connect is done, we
5587 set this here perhaps a second time */
5591 * This check is quite a hack. We're calling _fsetmode to fix the problem
5592 * with fwrite converting newline characters (you get mangled text files,
5593 * and corrupted binary files when you download to stdout and redirect it to
5597 if((data->set.out)->_handle == NULL) {
5598 _fsetmode(stdout, "b");
5605 CURLcode Curl_connect(struct SessionHandle *data,
5606 struct connectdata **in_connect,
5608 bool *protocol_done)
5612 *asyncp = FALSE; /* assume synchronous resolves by default */
5614 /* call the stuff that needs to be called */
5615 code = create_conn(data, in_connect, asyncp);
5617 if(CURLE_OK == code) {
5619 if((*in_connect)->send_pipe->size || (*in_connect)->recv_pipe->size)
5621 *protocol_done = TRUE;
5623 /* DNS resolution is done: that's either because this is a reused
5624 connection, in which case DNS was unnecessary, or because DNS
5625 really did finish already (synch resolver/fast async resolve) */
5626 code = Curl_setup_conn(*in_connect, protocol_done);
5630 if(code == CURLE_NO_CONNECTION_AVAILABLE) {
5635 if(code && *in_connect) {
5636 /* We're not allowed to return failure with memory left allocated
5637 in the connectdata struct, free those here */
5638 Curl_disconnect(*in_connect, FALSE); /* close the connection */
5639 *in_connect = NULL; /* return a NULL */
5645 CURLcode Curl_done(struct connectdata **connp,
5646 CURLcode status, /* an error if this is called after an
5647 error was detected */
5651 struct connectdata *conn;
5652 struct SessionHandle *data;
5654 DEBUGASSERT(*connp);
5660 /* Stop if Curl_done() has already been called */
5663 Curl_getoff_all_pipelines(data, conn);
5665 if((conn->send_pipe->size + conn->recv_pipe->size != 0 &&
5666 !data->set.reuse_forbid &&
5668 /* Stop if pipeline is not empty and we do not have to close
5672 conn->bits.done = TRUE; /* called just now! */
5674 /* Cleanup possible redirect junk */
5675 if(data->req.newurl) {
5676 free(data->req.newurl);
5677 data->req.newurl = NULL;
5679 if(data->req.location) {
5680 free(data->req.location);
5681 data->req.location = NULL;
5684 Curl_resolver_cancel(conn);
5686 if(conn->dns_entry) {
5687 Curl_resolv_unlock(data, conn->dns_entry); /* done with this */
5688 conn->dns_entry = NULL;
5692 case CURLE_ABORTED_BY_CALLBACK:
5693 case CURLE_READ_ERROR:
5694 case CURLE_WRITE_ERROR:
5695 /* When we're aborted due to a callback return code it basically have to
5696 be counted as premature as there is trouble ahead if we don't. We have
5697 many callbacks and protocols work differently, we could potentially do
5698 this more fine-grained in the future. */
5704 /* this calls the protocol-specific function pointer previously set */
5705 if(conn->handler->done)
5706 result = conn->handler->done(conn, status, premature);
5710 if(Curl_pgrsDone(conn) && !result)
5711 result = CURLE_ABORTED_BY_CALLBACK;
5713 /* if the transfer was completed in a paused state there can be buffered
5714 data left to write and then kill */
5715 if(data->state.tempwrite) {
5716 free(data->state.tempwrite);
5717 data->state.tempwrite = NULL;
5720 /* if data->set.reuse_forbid is TRUE, it means the libcurl client has
5721 forced us to close this no matter what we think.
5723 if conn->bits.close is TRUE, it means that the connection should be
5724 closed in spite of all our efforts to be nice, due to protocol
5725 restrictions in our or the server's end
5727 if premature is TRUE, it means this connection was said to be DONE before
5728 the entire request operation is complete and thus we can't know in what
5729 state it is for re-using, so we're forced to close it. In a perfect world
5730 we can add code that keep track of if we really must close it here or not,
5731 but currently we have no such detail knowledge.
5733 if(data->set.reuse_forbid || conn->bits.close || premature) {
5734 CURLcode res2 = Curl_disconnect(conn, premature); /* close connection */
5736 /* If we had an error already, make sure we return that one. But
5737 if we got a new error, return that. */
5742 /* the connection is no longer in use */
5743 if(ConnectionDone(data, conn)) {
5744 /* remember the most recently used connection */
5745 data->state.lastconnect = conn;
5747 infof(data, "Connection #%ld to host %s left intact\n",
5748 conn->connection_id,
5749 conn->bits.httpproxy?conn->proxy.dispname:conn->host.dispname);
5752 data->state.lastconnect = NULL;
5755 *connp = NULL; /* to make the caller of this function better detect that
5756 this was either closed or handed over to the connection
5757 cache here, and therefore cannot be used from this point on
5759 Curl_free_request_state(data);
5765 * do_init() inits the readwrite session. This is inited each time (in the DO
5766 * function before the protocol-specific DO functions are invoked) for a
5767 * transfer, sometimes multiple times on the same SessionHandle. Make sure
5768 * nothing in here depends on stuff that are setup dynamically for the
5772 static CURLcode do_init(struct connectdata *conn)
5774 struct SessionHandle *data = conn->data;
5775 struct SingleRequest *k = &data->req;
5777 conn->bits.done = FALSE; /* Curl_done() is not called yet */
5778 conn->bits.do_more = FALSE; /* by default there's no curl_do_more() to use */
5779 data->state.expect100header = FALSE;
5781 if(data->set.opt_no_body)
5782 /* in HTTP lingo, no body means using the HEAD request... */
5783 data->set.httpreq = HTTPREQ_HEAD;
5784 else if(HTTPREQ_HEAD == data->set.httpreq)
5785 /* ... but if unset there really is no perfect method that is the
5786 "opposite" of HEAD but in reality most people probably think GET
5787 then. The important thing is that we can't let it remain HEAD if the
5788 opt_no_body is set FALSE since then we'll behave wrong when getting
5790 data->set.httpreq = HTTPREQ_GET;
5792 k->start = Curl_tvnow(); /* start time */
5793 k->now = k->start; /* current time is now */
5794 k->header = TRUE; /* assume header */
5798 k->buf = data->state.buffer;
5799 k->uploadbuf = data->state.uploadbuffer;
5800 k->hbufp = data->state.headerbuff;
5801 k->ignorebody=FALSE;
5803 Curl_speedinit(data);
5805 Curl_pgrsSetUploadCounter(data, 0);
5806 Curl_pgrsSetDownloadCounter(data, 0);
5812 * do_complete is called when the DO actions are complete.
5814 * We init chunking and trailer bits to their default values here immediately
5815 * before receiving any header data for the current request in the pipeline.
5817 static void do_complete(struct connectdata *conn)
5819 conn->data->req.chunk=FALSE;
5820 conn->data->req.maxfd = (conn->sockfd>conn->writesockfd?
5821 conn->sockfd:conn->writesockfd)+1;
5822 Curl_pgrsTime(conn->data, TIMER_PRETRANSFER);
5825 CURLcode Curl_do(struct connectdata **connp, bool *done)
5827 CURLcode result=CURLE_OK;
5828 struct connectdata *conn = *connp;
5829 struct SessionHandle *data = conn->data;
5831 if(conn->handler->do_it) {
5832 /* generic protocol-specific function pointer set in curl_connect() */
5833 result = conn->handler->do_it(conn, done);
5835 /* This was formerly done in transfer.c, but we better do it here */
5836 if((CURLE_SEND_ERROR == result) && conn->bits.reuse) {
5838 * If the connection is using an easy handle, call reconnect
5839 * to re-establish the connection. Otherwise, let the multi logic
5840 * figure out how to re-establish the connection.
5843 result = Curl_reconnect_request(connp);
5845 if(result == CURLE_OK) {
5846 /* ... finally back to actually retry the DO phase */
5847 conn = *connp; /* re-assign conn since Curl_reconnect_request
5848 creates a new connection */
5849 result = conn->handler->do_it(conn, done);
5856 if((result == CURLE_OK) && *done)
5857 /* do_complete must be called after the protocol-specific DO function */
5864 * Curl_do_more() is called during the DO_MORE multi state. It is basically a
5865 * second stage DO state which (wrongly) was introduced to support FTP's
5866 * second connection.
5868 * TODO: A future libcurl should be able to work away this state.
5870 * 'complete' can return 0 for incomplete, 1 for done and -1 for go back to
5871 * DOING state there's more work to do!
5874 CURLcode Curl_do_more(struct connectdata *conn, int *complete)
5876 CURLcode result=CURLE_OK;
5880 if(conn->handler->do_more)
5881 result = conn->handler->do_more(conn, complete);
5883 if(!result && (*complete == 1))
5884 /* do_complete must be called after the protocol-specific DO function */