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 #ifndef CURL_DISABLE_FTP
27 #ifdef HAVE_NETINET_IN_H
28 #include <netinet/in.h>
30 #ifdef HAVE_ARPA_INET_H
31 #include <arpa/inet.h>
34 #include <sys/utsname.h>
44 #if (defined(NETWARE) && defined(__NOVELL_LIBC__))
46 #define in_addr_t unsigned long
49 #include <curl/curl.h>
57 #include "http.h" /* for HTTP proxy tunnel stuff */
61 #include "ftplistparser.h"
63 #if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
67 #include "strtoofft.h"
72 #include "inet_ntop.h"
73 #include "inet_pton.h"
75 #include "parsedate.h" /* for the week day and month names */
76 #include "sockaddr.h" /* required for Curl_sockaddr_storage */
80 #include "speedcheck.h"
82 #include "http_proxy.h"
83 #include "non-ascii.h"
85 #define _MPRINTF_REPLACE /* use our functions only */
86 #include <curl/mprintf.h>
88 #include "curl_memory.h"
89 /* The last #include file should be: */
93 #define NI_MAXHOST 1025
95 #ifndef INET_ADDRSTRLEN
96 #define INET_ADDRSTRLEN 16
99 #ifdef CURL_DISABLE_VERBOSE_STRINGS
100 #define ftp_pasv_verbose(a,b,c,d) Curl_nop_stmt
103 /* Local API functions */
105 static void _state(struct connectdata *conn,
107 #define state(x,y) _state(x,y)
109 static void _state(struct connectdata *conn,
112 #define state(x,y) _state(x,y,__LINE__)
115 static CURLcode ftp_sendquote(struct connectdata *conn,
116 struct curl_slist *quote);
117 static CURLcode ftp_quit(struct connectdata *conn);
118 static CURLcode ftp_parse_url_path(struct connectdata *conn);
119 static CURLcode ftp_regular_transfer(struct connectdata *conn, bool *done);
120 #ifndef CURL_DISABLE_VERBOSE_STRINGS
121 static void ftp_pasv_verbose(struct connectdata *conn,
123 char *newhost, /* ascii version */
126 static CURLcode ftp_state_post_rest(struct connectdata *conn);
127 static CURLcode ftp_state_post_cwd(struct connectdata *conn);
128 static CURLcode ftp_state_quote(struct connectdata *conn,
129 bool init, ftpstate instate);
130 static CURLcode ftp_nb_type(struct connectdata *conn,
131 bool ascii, ftpstate newstate);
132 static int ftp_need_type(struct connectdata *conn,
134 static CURLcode ftp_do(struct connectdata *conn, bool *done);
135 static CURLcode ftp_done(struct connectdata *conn,
136 CURLcode, bool premature);
137 static CURLcode ftp_connect(struct connectdata *conn, bool *done);
138 static CURLcode ftp_disconnect(struct connectdata *conn, bool dead_connection);
139 static CURLcode ftp_do_more(struct connectdata *conn, bool *completed);
140 static CURLcode ftp_multi_statemach(struct connectdata *conn, bool *done);
141 static int ftp_getsock(struct connectdata *conn, curl_socket_t *socks,
143 static int ftp_domore_getsock(struct connectdata *conn, curl_socket_t *socks,
145 static CURLcode ftp_doing(struct connectdata *conn,
147 static CURLcode ftp_setup_connection(struct connectdata * conn);
149 static CURLcode init_wc_data(struct connectdata *conn);
150 static CURLcode wc_statemach(struct connectdata *conn);
152 static void wc_data_dtor(void *ptr);
154 static CURLcode ftp_state_post_retr_size(struct connectdata *conn,
155 curl_off_t filesize);
157 static CURLcode ftp_readresp(curl_socket_t sockfd,
161 static CURLcode ftp_dophase_done(struct connectdata *conn,
164 /* easy-to-use macro: */
165 #define PPSENDF(x,y,z) if((result = Curl_pp_sendf(x,y,z)) != CURLE_OK) \
170 * FTP protocol handler.
173 const struct Curl_handler Curl_handler_ftp = {
175 ftp_setup_connection, /* setup_connection */
178 ftp_do_more, /* do_more */
179 ftp_connect, /* connect_it */
180 ftp_multi_statemach, /* connecting */
181 ftp_doing, /* doing */
182 ftp_getsock, /* proto_getsock */
183 ftp_getsock, /* doing_getsock */
184 ftp_domore_getsock, /* domore_getsock */
185 ZERO_NULL, /* perform_getsock */
186 ftp_disconnect, /* disconnect */
187 ZERO_NULL, /* readwrite */
188 PORT_FTP, /* defport */
189 CURLPROTO_FTP, /* protocol */
190 PROTOPT_DUAL | PROTOPT_CLOSEACTION | PROTOPT_NEEDSPWD
191 | PROTOPT_NOURLQUERY /* flags */
197 * FTPS protocol handler.
200 const struct Curl_handler Curl_handler_ftps = {
202 ftp_setup_connection, /* setup_connection */
205 ftp_do_more, /* do_more */
206 ftp_connect, /* connect_it */
207 ftp_multi_statemach, /* connecting */
208 ftp_doing, /* doing */
209 ftp_getsock, /* proto_getsock */
210 ftp_getsock, /* doing_getsock */
211 ftp_domore_getsock, /* domore_getsock */
212 ZERO_NULL, /* perform_getsock */
213 ftp_disconnect, /* disconnect */
214 ZERO_NULL, /* readwrite */
215 PORT_FTPS, /* defport */
216 CURLPROTO_FTP | CURLPROTO_FTPS, /* protocol */
217 PROTOPT_SSL | PROTOPT_DUAL | PROTOPT_CLOSEACTION |
218 PROTOPT_NEEDSPWD | PROTOPT_NOURLQUERY /* flags */
222 #ifndef CURL_DISABLE_HTTP
224 * HTTP-proxyed FTP protocol handler.
227 static const struct Curl_handler Curl_handler_ftp_proxy = {
229 ZERO_NULL, /* setup_connection */
230 Curl_http, /* do_it */
231 Curl_http_done, /* done */
232 ZERO_NULL, /* do_more */
233 ZERO_NULL, /* connect_it */
234 ZERO_NULL, /* connecting */
235 ZERO_NULL, /* doing */
236 ZERO_NULL, /* proto_getsock */
237 ZERO_NULL, /* doing_getsock */
238 ZERO_NULL, /* domore_getsock */
239 ZERO_NULL, /* perform_getsock */
240 ZERO_NULL, /* disconnect */
241 ZERO_NULL, /* readwrite */
242 PORT_FTP, /* defport */
243 CURLPROTO_HTTP, /* protocol */
244 PROTOPT_NONE /* flags */
250 * HTTP-proxyed FTPS protocol handler.
253 static const struct Curl_handler Curl_handler_ftps_proxy = {
255 ZERO_NULL, /* setup_connection */
256 Curl_http, /* do_it */
257 Curl_http_done, /* done */
258 ZERO_NULL, /* do_more */
259 ZERO_NULL, /* connect_it */
260 ZERO_NULL, /* connecting */
261 ZERO_NULL, /* doing */
262 ZERO_NULL, /* proto_getsock */
263 ZERO_NULL, /* doing_getsock */
264 ZERO_NULL, /* domore_getsock */
265 ZERO_NULL, /* perform_getsock */
266 ZERO_NULL, /* disconnect */
267 ZERO_NULL, /* readwrite */
268 PORT_FTPS, /* defport */
269 CURLPROTO_HTTP, /* protocol */
270 PROTOPT_NONE /* flags */
277 * NOTE: back in the old days, we added code in the FTP code that made NOBODY
278 * requests on files respond with headers passed to the client/stdout that
279 * looked like HTTP ones.
281 * This approach is not very elegant, it causes confusion and is error-prone.
282 * It is subject for removal at the next (or at least a future) soname bump.
283 * Until then you can test the effects of the removal by undefining the
284 * following define named CURL_FTP_HTTPSTYLE_HEAD.
286 #define CURL_FTP_HTTPSTYLE_HEAD 1
288 static void freedirs(struct ftp_conn *ftpc)
292 for(i=0; i < ftpc->dirdepth; i++) {
308 /* Returns non-zero if the given string contains CR (\r) or LF (\n),
309 which are not allowed within RFC 959 <string>.
310 Note: The input string is in the client's encoding which might
311 not be ASCII, so escape sequences \r & \n must be used instead
312 of hex values 0x0d & 0x0a.
314 static bool isBadFtpString(const char *string)
316 return ((NULL != strchr(string, '\r')) ||
317 (NULL != strchr(string, '\n'))) ? TRUE : FALSE;
320 /***********************************************************************
322 * AcceptServerConnect()
324 * After connection request is received from the server this function is
325 * called to accept the connection and close the listening socket
328 static CURLcode AcceptServerConnect(struct connectdata *conn)
330 struct SessionHandle *data = conn->data;
331 curl_socket_t sock = conn->sock[SECONDARYSOCKET];
332 curl_socket_t s = CURL_SOCKET_BAD;
334 struct Curl_sockaddr_storage add;
336 struct sockaddr_in add;
338 curl_socklen_t size = (curl_socklen_t) sizeof(add);
340 if(0 == getsockname(sock, (struct sockaddr *) &add, &size)) {
343 s=accept(sock, (struct sockaddr *) &add, &size);
345 Curl_closesocket(conn, sock); /* close the first socket */
347 if(CURL_SOCKET_BAD == s) {
348 failf(data, "Error accept()ing server connect");
349 return CURLE_FTP_PORT_FAILED;
351 infof(data, "Connection accepted from server\n");
353 conn->sock[SECONDARYSOCKET] = s;
354 curlx_nonblock(s, TRUE); /* enable non-blocking */
355 conn->sock_accepted[SECONDARYSOCKET] = TRUE;
357 if(data->set.fsockopt) {
360 /* activate callback for setting socket options */
361 error = data->set.fsockopt(data->set.sockopt_client,
363 CURLSOCKTYPE_ACCEPT);
366 Curl_closesocket(conn, s); /* close the socket and bail out */
367 conn->sock[SECONDARYSOCKET] = CURL_SOCKET_BAD;
368 return CURLE_ABORTED_BY_CALLBACK;
377 * ftp_timeleft_accept() returns the amount of milliseconds left allowed for
378 * waiting server to connect. If the value is negative, the timeout time has
381 * The start time is stored in progress.t_acceptdata - as set with
382 * Curl_pgrsTime(..., TIMER_STARTACCEPT);
385 static long ftp_timeleft_accept(struct SessionHandle *data)
387 long timeout_ms = DEFAULT_ACCEPT_TIMEOUT;
391 if(data->set.accepttimeout > 0)
392 timeout_ms = data->set.accepttimeout;
396 /* check if the generic timeout possibly is set shorter */
397 other = Curl_timeleft(data, &now, FALSE);
398 if(other && (other < timeout_ms))
399 /* note that this also works fine for when other happens to be negative
400 due to it already having elapsed */
403 /* subtract elapsed time */
404 timeout_ms -= Curl_tvdiff(now, data->progress.t_acceptdata);
406 /* avoid returning 0 as that means no timeout! */
414 /***********************************************************************
416 * ReceivedServerConnect()
418 * After allowing server to connect to us from data port, this function
419 * checks both data connection for connection establishment and ctrl
420 * connection for a negative response regarding a failure in connecting
423 static CURLcode ReceivedServerConnect(struct connectdata *conn, bool *received)
425 struct SessionHandle *data = conn->data;
426 curl_socket_t ctrl_sock = conn->sock[FIRSTSOCKET];
427 curl_socket_t data_sock = conn->sock[SECONDARYSOCKET];
428 struct ftp_conn *ftpc = &conn->proto.ftpc;
429 struct pingpong *pp = &ftpc->pp;
437 timeout_ms = ftp_timeleft_accept(data);
438 infof(data, "Checking for server connect\n");
440 /* if a timeout was already reached, bail out */
441 failf(data, "Accept timeout occurred while waiting server connect");
442 return CURLE_FTP_ACCEPT_TIMEOUT;
445 /* First check whether there is a cached response from server */
446 if(pp->cache_size && pp->cache && pp->cache[0] > '3') {
447 /* Data connection could not be established, let's return */
448 infof(data, "There is negative response in cache while serv connect\n");
449 Curl_GetFTPResponse(&nread, conn, &ftpcode);
450 return CURLE_FTP_ACCEPT_FAILED;
453 result = Curl_socket_check(ctrl_sock, data_sock, CURL_SOCKET_BAD, 0);
455 /* see if the connection request is already here */
459 failf(data, "Error while waiting for server connect");
460 return CURLE_FTP_ACCEPT_FAILED;
461 case 0: /* Server connect is not received yet */
465 if(result & CURL_CSELECT_IN2) {
466 infof(data, "Ready to accept data connection from server\n");
469 else if(result & CURL_CSELECT_IN) {
470 infof(data, "Ctrl conn has data while waiting for data conn\n");
471 Curl_GetFTPResponse(&nread, conn, &ftpcode);
474 return CURLE_FTP_ACCEPT_FAILED;
476 return CURLE_FTP_WEIRD_SERVER_REPLY;
486 /***********************************************************************
490 * After connection from server is accepted this function is called to
491 * setup transfer parameters and initiate the data transfer.
494 static CURLcode InitiateTransfer(struct connectdata *conn)
496 struct SessionHandle *data = conn->data;
497 struct FTP *ftp = data->state.proto.ftp;
498 CURLcode result = CURLE_OK;
500 if(conn->ssl[SECONDARYSOCKET].use) {
501 /* since we only have a plaintext TCP connection here, we must now
502 * do the TLS stuff */
503 infof(data, "Doing the SSL/TLS handshake on the data stream\n");
504 result = Curl_ssl_connect(conn, SECONDARYSOCKET);
509 if(conn->proto.ftpc.state_saved == FTP_STOR) {
510 *(ftp->bytecountp)=0;
512 /* When we know we're uploading a specified file, we can get the file
513 size prior to the actual upload. */
515 Curl_pgrsSetUploadSize(data, data->set.infilesize);
517 /* set the SO_SNDBUF for the secondary socket for those who need it */
518 Curl_sndbufset(conn->sock[SECONDARYSOCKET]);
520 Curl_setup_transfer(conn, -1, -1, FALSE, NULL, /* no download */
521 SECONDARYSOCKET, ftp->bytecountp);
525 Curl_setup_transfer(conn, SECONDARYSOCKET,
526 conn->proto.ftpc.retr_size_saved, FALSE,
527 ftp->bytecountp, -1, NULL); /* no upload here */
530 conn->proto.ftpc.pp.pending_resp = TRUE; /* expect server response */
531 state(conn, FTP_STOP);
536 /***********************************************************************
538 * AllowServerConnect()
540 * When we've issue the PORT command, we have told the server to connect to
541 * us. This function checks whether data connection is established if so it is
545 static CURLcode AllowServerConnect(struct connectdata *conn, bool *connected)
547 struct SessionHandle *data = conn->data;
549 CURLcode ret = CURLE_OK;
552 infof(data, "Preparing for accepting server on data port\n");
554 /* Save the time we start accepting server connect */
555 Curl_pgrsTime(data, TIMER_STARTACCEPT);
557 timeout_ms = ftp_timeleft_accept(data);
559 /* if a timeout was already reached, bail out */
560 failf(data, "Accept timeout occurred while waiting server connect");
561 return CURLE_FTP_ACCEPT_TIMEOUT;
564 /* see if the connection request is already here */
565 ret = ReceivedServerConnect(conn, connected);
570 ret = AcceptServerConnect(conn);
574 ret = InitiateTransfer(conn);
579 /* Add timeout to multi handle and break out of the loop */
580 if(ret == CURLE_OK && *connected == FALSE) {
581 if(data->set.accepttimeout > 0)
582 Curl_expire(data, data->set.accepttimeout);
584 Curl_expire(data, DEFAULT_ACCEPT_TIMEOUT);
591 /* macro to check for a three-digit ftp status code at the start of the
593 #define STATUSCODE(line) (ISDIGIT(line[0]) && ISDIGIT(line[1]) && \
596 /* macro to check for the last line in an FTP server response */
597 #define LASTLINE(line) (STATUSCODE(line) && (' ' == line[3]))
599 static bool ftp_endofresp(struct connectdata *conn, char *line, size_t len,
604 if((len > 3) && LASTLINE(line)) {
605 *code = curlx_sltosi(strtol(line, NULL, 10));
612 static CURLcode ftp_readresp(curl_socket_t sockfd,
614 int *ftpcode, /* return the ftp-code if done */
615 size_t *size) /* size of the response */
617 struct connectdata *conn = pp->conn;
618 struct SessionHandle *data = conn->data;
619 #if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
620 char * const buf = data->state.buffer;
622 CURLcode result = CURLE_OK;
625 result = Curl_pp_readresp(sockfd, pp, &code, size);
627 #if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
628 /* handle the security-oriented responses 6xx ***/
629 /* FIXME: some errorchecking perhaps... ***/
632 code = Curl_sec_read_msg(conn, buf, PROT_SAFE);
635 code = Curl_sec_read_msg(conn, buf, PROT_PRIVATE);
638 code = Curl_sec_read_msg(conn, buf, PROT_CONFIDENTIAL);
641 /* normal ftp stuff we pass through! */
646 /* store the latest code for later retrieval */
647 data->info.httpcode=code;
653 /* 421 means "Service not available, closing control connection." and FTP
654 * servers use it to signal that idle session timeout has been exceeded.
655 * If we ignored the response, it could end up hanging in some cases.
657 * This response code can come at any point so having it treated
658 * generically is a good idea.
660 infof(data, "We got a 421 - timeout!\n");
661 state(conn, FTP_STOP);
662 return CURLE_OPERATION_TIMEDOUT;
668 /* --- parse FTP server responses --- */
671 * Curl_GetFTPResponse() is a BLOCKING function to read the full response
672 * from a server after a command.
676 CURLcode Curl_GetFTPResponse(ssize_t *nreadp, /* return number of bytes read */
677 struct connectdata *conn,
678 int *ftpcode) /* return the ftp-code */
681 * We cannot read just one byte per read() and then go back to select() as
682 * the OpenSSL read() doesn't grok that properly.
684 * Alas, read as much as possible, split up into lines, use the ending
685 * line in a response or continue reading. */
687 curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
688 long timeout; /* timeout in milliseconds */
690 struct SessionHandle *data = conn->data;
691 CURLcode result = CURLE_OK;
692 struct ftp_conn *ftpc = &conn->proto.ftpc;
693 struct pingpong *pp = &ftpc->pp;
696 int value_to_be_ignored=0;
699 *ftpcode = 0; /* 0 for errors */
701 /* make the pointer point to something for the rest of this function */
702 ftpcode = &value_to_be_ignored;
706 while(!*ftpcode && !result) {
707 /* check and reset timeout value every lap */
708 timeout = Curl_pp_state_timeout(pp);
711 failf(data, "FTP response timeout");
712 return CURLE_OPERATION_TIMEDOUT; /* already too little time */
715 interval_ms = 1000; /* use 1 second timeout intervals */
716 if(timeout < interval_ms)
717 interval_ms = timeout;
720 * Since this function is blocking, we need to wait here for input on the
721 * connection and only then we call the response reading function. We do
722 * timeout at least every second to make the timeout check run.
724 * A caution here is that the ftp_readresp() function has a cache that may
725 * contain pieces of a response from the previous invoke and we need to
726 * make sure we don't just wait for input while there is unhandled data in
727 * that cache. But also, if the cache is there, we call ftp_readresp() and
728 * the cache wasn't good enough to continue we must not just busy-loop
729 * around this function.
733 if(pp->cache && (cache_skip < 2)) {
735 * There's a cache left since before. We then skipping the wait for
736 * socket action, unless this is the same cache like the previous round
737 * as then the cache was deemed not enough to act on and we then need to
738 * wait for more data anyway.
742 switch (Curl_socket_ready(sockfd, CURL_SOCKET_BAD, interval_ms)) {
743 case -1: /* select() error, stop reading */
744 failf(data, "FTP response aborted due to select/poll error: %d",
746 return CURLE_RECV_ERROR;
748 case 0: /* timeout */
749 if(Curl_pgrsUpdate(conn))
750 return CURLE_ABORTED_BY_CALLBACK;
751 continue; /* just continue in our loop for the timeout duration */
753 default: /* for clarity */
757 result = ftp_readresp(sockfd, pp, ftpcode, &nread);
761 if(!nread && pp->cache)
762 /* bump cache skip counter as on repeated skips we must wait for more
766 /* when we got data or there is no cache left, we reset the cache skip
772 } /* while there's buffer left and loop is requested */
774 pp->pending_resp = FALSE;
779 /* This is the ONLY way to change FTP state! */
780 static void _state(struct connectdata *conn,
787 #if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
788 /* for debug purposes */
789 static const char * const names[]={
827 struct ftp_conn *ftpc = &conn->proto.ftpc;
828 #if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
829 if(ftpc->state != newstate)
830 infof(conn->data, "FTP %p (line %d) state change from %s to %s\n",
831 ftpc, lineno, names[ftpc->state], names[newstate]);
833 ftpc->state = newstate;
836 static CURLcode ftp_state_user(struct connectdata *conn)
839 struct FTP *ftp = conn->data->state.proto.ftp;
841 PPSENDF(&conn->proto.ftpc.pp, "USER %s", ftp->user?ftp->user:"");
843 state(conn, FTP_USER);
844 conn->data->state.ftp_trying_alternative = FALSE;
849 static CURLcode ftp_state_pwd(struct connectdata *conn)
853 /* send PWD to discover our entry point */
854 PPSENDF(&conn->proto.ftpc.pp, "PWD", NULL);
855 state(conn, FTP_PWD);
860 /* For the FTP "protocol connect" and "doing" phases only */
861 static int ftp_getsock(struct connectdata *conn,
862 curl_socket_t *socks,
865 return Curl_pp_getsock(&conn->proto.ftpc.pp, socks, numsocks);
868 /* For the FTP "DO_MORE" phase only */
869 static int ftp_domore_getsock(struct connectdata *conn, curl_socket_t *socks,
872 struct ftp_conn *ftpc = &conn->proto.ftpc;
875 return GETSOCK_BLANK;
877 /* When in DO_MORE state, we could be either waiting for us to connect to a
878 remote site, or we could wait for that site to connect to us. Or just
879 handle ordinary commands.
881 When waiting for a connect, we will be in FTP_STOP state and then we wait
882 for the secondary socket to become writeable. If we're in another state,
883 we're still handling commands on the control (primary) connection.
887 switch(ftpc->state) {
891 return Curl_pp_getsock(&conn->proto.ftpc.pp, socks, numsocks);
894 socks[0] = conn->sock[SECONDARYSOCKET];
895 if(ftpc->wait_data_conn) {
896 socks[1] = conn->sock[FIRSTSOCKET];
897 return GETSOCK_READSOCK(0) | GETSOCK_READSOCK(1);
900 return GETSOCK_READSOCK(0);
903 /* This is called after the FTP_QUOTE state is passed.
905 ftp_state_cwd() sends the range of CWD commands to the server to change to
906 the correct directory. It may also need to send MKD commands to create
907 missing ones, if that option is enabled.
909 static CURLcode ftp_state_cwd(struct connectdata *conn)
911 CURLcode result = CURLE_OK;
912 struct ftp_conn *ftpc = &conn->proto.ftpc;
915 /* already done and fine */
916 result = ftp_state_post_cwd(conn);
918 ftpc->count2 = 0; /* count2 counts failed CWDs */
920 /* count3 is set to allow a MKD to fail once. In the case when first CWD
921 fails and then MKD fails (due to another session raced it to create the
922 dir) this then allows for a second try to CWD to it */
923 ftpc->count3 = (conn->data->set.ftp_create_missing_dirs==2)?1:0;
925 if(conn->bits.reuse && ftpc->entrypath) {
926 /* This is a re-used connection. Since we change directory to where the
927 transfer is taking place, we must first get back to the original dir
928 where we ended up after login: */
929 ftpc->count1 = 0; /* we count this as the first path, then we add one
930 for all upcoming ones in the ftp->dirs[] array */
931 PPSENDF(&conn->proto.ftpc.pp, "CWD %s", ftpc->entrypath);
932 state(conn, FTP_CWD);
937 /* issue the first CWD, the rest is sent when the CWD responses are
939 PPSENDF(&conn->proto.ftpc.pp, "CWD %s", ftpc->dirs[ftpc->count1 -1]);
940 state(conn, FTP_CWD);
943 /* No CWD necessary */
944 result = ftp_state_post_cwd(conn);
957 static CURLcode ftp_state_use_port(struct connectdata *conn,
958 ftpport fcmd) /* start with this */
961 CURLcode result = CURLE_OK;
962 struct ftp_conn *ftpc = &conn->proto.ftpc;
963 struct SessionHandle *data=conn->data;
964 curl_socket_t portsock= CURL_SOCKET_BAD;
965 char myhost[256] = "";
967 struct Curl_sockaddr_storage ss;
968 Curl_addrinfo *res, *ai;
969 curl_socklen_t sslen;
970 char hbuf[NI_MAXHOST];
971 struct sockaddr *sa=(struct sockaddr *)&ss;
972 struct sockaddr_in * const sa4 = (void *)sa;
974 struct sockaddr_in6 * const sa6 = (void *)sa;
977 static const char mode[][5] = { "EPRT", "PORT" };
981 char *string_ftpport = data->set.str[STRING_FTPPORT];
982 struct Curl_dns_entry *h=NULL;
983 unsigned short port_min = 0;
984 unsigned short port_max = 0;
986 bool possibly_non_local = TRUE;
990 /* Step 1, figure out what is requested,
992 * (ipv4|ipv6|domain|interface)?(:port(-range)?)?
995 if(data->set.str[STRING_FTPPORT] &&
996 (strlen(data->set.str[STRING_FTPPORT]) > 1)) {
999 size_t addrlen = INET6_ADDRSTRLEN > strlen(string_ftpport) ?
1000 INET6_ADDRSTRLEN : strlen(string_ftpport);
1002 size_t addrlen = INET_ADDRSTRLEN > strlen(string_ftpport) ?
1003 INET_ADDRSTRLEN : strlen(string_ftpport);
1005 char *ip_start = string_ftpport;
1006 char *ip_end = NULL;
1007 char *port_start = NULL;
1008 char *port_sep = NULL;
1010 addr = calloc(addrlen+1, 1);
1012 return CURLE_OUT_OF_MEMORY;
1015 if(*string_ftpport == '[') {
1016 /* [ipv6]:port(-range) */
1017 ip_start = string_ftpport + 1;
1018 if((ip_end = strchr(string_ftpport, ']')) != NULL )
1019 strncpy(addr, ip_start, ip_end - ip_start);
1023 if(*string_ftpport == ':') {
1025 ip_end = string_ftpport;
1027 else if((ip_end = strchr(string_ftpport, ':')) != NULL) {
1028 /* either ipv6 or (ipv4|domain|interface):port(-range) */
1030 if(Curl_inet_pton(AF_INET6, string_ftpport, sa6) == 1) {
1032 port_min = port_max = 0;
1033 strcpy(addr, string_ftpport);
1034 ip_end = NULL; /* this got no port ! */
1038 /* (ipv4|domain|interface):port(-range) */
1039 strncpy(addr, string_ftpport, ip_end - ip_start );
1042 /* ipv4|interface */
1043 strcpy(addr, string_ftpport);
1045 /* parse the port */
1046 if(ip_end != NULL) {
1047 if((port_start = strchr(ip_end, ':')) != NULL) {
1048 port_min = curlx_ultous(strtoul(port_start+1, NULL, 10));
1049 if((port_sep = strchr(port_start, '-')) != NULL) {
1050 port_max = curlx_ultous(strtoul(port_sep + 1, NULL, 10));
1053 port_max = port_min;
1057 /* correct errors like:
1059 * :-4711 , in this case port_min is (unsigned)-1,
1060 * therefore port_min > port_max for all cases
1061 * but port_max = (unsigned)-1
1063 if(port_min > port_max )
1064 port_min = port_max = 0;
1068 /* attempt to get the address of the given interface name */
1069 switch(Curl_if2ip(conn->ip_addr->ai_family, conn->scope, addr,
1070 hbuf, sizeof(hbuf))) {
1071 case IF2IP_NOT_FOUND:
1072 /* not an interface, use the given string as host name instead */
1075 case IF2IP_AF_NOT_SUPPORTED:
1076 return CURLE_FTP_PORT_FAILED;
1078 host = hbuf; /* use the hbuf for host name */
1082 /* there was only a port(-range) given, default the host */
1084 } /* data->set.ftpport */
1087 /* not an interface and not a host name, get default by extracting
1088 the IP from the control connection */
1091 if(getsockname(conn->sock[FIRSTSOCKET], sa, &sslen)) {
1092 failf(data, "getsockname() failed: %s",
1093 Curl_strerror(conn, SOCKERRNO) );
1094 Curl_safefree(addr);
1095 return CURLE_FTP_PORT_FAILED;
1097 switch(sa->sa_family) {
1100 Curl_inet_ntop(sa->sa_family, &sa6->sin6_addr, hbuf, sizeof(hbuf));
1104 Curl_inet_ntop(sa->sa_family, &sa4->sin_addr, hbuf, sizeof(hbuf));
1107 host = hbuf; /* use this host name */
1108 possibly_non_local = FALSE; /* we know it is local now */
1111 /* resolv ip/host to ip */
1112 rc = Curl_resolv(conn, host, 0, &h);
1113 if(rc == CURLRESOLV_PENDING)
1114 (void)Curl_resolver_wait_resolv(conn, &h);
1117 /* when we return from this function, we can forget about this entry
1118 to we can unlock it now already */
1119 Curl_resolv_unlock(data, h);
1122 res = NULL; /* failure! */
1125 failf(data, "failed to resolve the address provided to PORT: %s", host);
1126 Curl_safefree(addr);
1127 return CURLE_FTP_PORT_FAILED;
1130 Curl_safefree(addr);
1133 /* step 2, create a socket for the requested address */
1135 portsock = CURL_SOCKET_BAD;
1137 for(ai = res; ai; ai = ai->ai_next) {
1138 result = Curl_socket(conn, ai, NULL, &portsock);
1146 failf(data, "socket failure: %s", Curl_strerror(conn, error));
1147 return CURLE_FTP_PORT_FAILED;
1150 /* step 3, bind to a suitable local address */
1152 memcpy(sa, ai->ai_addr, ai->ai_addrlen);
1153 sslen = ai->ai_addrlen;
1155 for(port = port_min; port <= port_max;) {
1156 if(sa->sa_family == AF_INET)
1157 sa4->sin_port = htons(port);
1160 sa6->sin6_port = htons(port);
1162 /* Try binding the given address. */
1163 if(bind(portsock, sa, sslen) ) {
1166 if(possibly_non_local && (error == EADDRNOTAVAIL)) {
1167 /* The requested bind address is not local. Use the address used for
1168 * the control connection instead and restart the port loop
1171 infof(data, "bind(port=%hu) on non-local address failed: %s\n", port,
1172 Curl_strerror(conn, error) );
1175 if(getsockname(conn->sock[FIRSTSOCKET], sa, &sslen)) {
1176 failf(data, "getsockname() failed: %s",
1177 Curl_strerror(conn, SOCKERRNO) );
1178 Curl_closesocket(conn, portsock);
1179 return CURLE_FTP_PORT_FAILED;
1182 possibly_non_local = FALSE; /* don't try this again */
1185 else if(error != EADDRINUSE && error != EACCES) {
1186 failf(data, "bind(port=%hu) failed: %s", port,
1187 Curl_strerror(conn, error) );
1188 Curl_closesocket(conn, portsock);
1189 return CURLE_FTP_PORT_FAILED;
1198 /* maybe all ports were in use already*/
1199 if(port > port_max) {
1200 failf(data, "bind() failed, we ran out of ports!");
1201 Curl_closesocket(conn, portsock);
1202 return CURLE_FTP_PORT_FAILED;
1205 /* get the name again after the bind() so that we can extract the
1206 port number it uses now */
1208 if(getsockname(portsock, (struct sockaddr *)sa, &sslen)) {
1209 failf(data, "getsockname() failed: %s",
1210 Curl_strerror(conn, SOCKERRNO) );
1211 Curl_closesocket(conn, portsock);
1212 return CURLE_FTP_PORT_FAILED;
1215 /* step 4, listen on the socket */
1217 if(listen(portsock, 1)) {
1218 failf(data, "socket failure: %s", Curl_strerror(conn, SOCKERRNO));
1219 Curl_closesocket(conn, portsock);
1220 return CURLE_FTP_PORT_FAILED;
1223 /* step 5, send the proper FTP command */
1225 /* get a plain printable version of the numerical address to work with
1227 Curl_printable_address(ai, myhost, sizeof(myhost));
1230 if(!conn->bits.ftp_use_eprt && conn->bits.ipv6)
1231 /* EPRT is disabled but we are connected to a IPv6 host, so we ignore the
1232 request and enable EPRT again! */
1233 conn->bits.ftp_use_eprt = TRUE;
1236 for(; fcmd != DONE; fcmd++) {
1238 if(!conn->bits.ftp_use_eprt && (EPRT == fcmd))
1239 /* if disabled, goto next */
1242 if((PORT == fcmd) && sa->sa_family != AF_INET)
1243 /* PORT is ipv4 only */
1246 switch (sa->sa_family) {
1248 port = ntohs(sa4->sin_port);
1252 port = ntohs(sa6->sin6_port);
1256 continue; /* might as well skip this */
1261 * Two fine examples from RFC2428;
1263 * EPRT |1|132.235.1.2|6275|
1265 * EPRT |2|1080::8:800:200C:417A|5282|
1268 result = Curl_pp_sendf(&ftpc->pp, "%s |%d|%s|%hu|", mode[fcmd],
1269 sa->sa_family == AF_INET?1:2,
1272 failf(data, "Failure sending EPRT command: %s",
1273 curl_easy_strerror(result));
1274 Curl_closesocket(conn, portsock);
1275 /* don't retry using PORT */
1276 ftpc->count1 = PORT;
1278 state(conn, FTP_STOP);
1283 else if(PORT == fcmd) {
1284 char *source = myhost;
1287 /* translate x.x.x.x to x,x,x,x */
1288 while(source && *source) {
1297 snprintf(dest, 20, ",%d,%d", (int)(port>>8), (int)(port&0xff));
1299 result = Curl_pp_sendf(&ftpc->pp, "%s %s", mode[fcmd], tmp);
1301 failf(data, "Failure sending PORT command: %s",
1302 curl_easy_strerror(result));
1303 Curl_closesocket(conn, portsock);
1305 state(conn, FTP_STOP);
1312 /* store which command was sent */
1313 ftpc->count1 = fcmd;
1315 /* we set the secondary socket variable to this for now, it is only so that
1316 the cleanup function will close it in case we fail before the true
1317 secondary stuff is made */
1318 if(CURL_SOCKET_BAD != conn->sock[SECONDARYSOCKET])
1319 Curl_closesocket(conn, conn->sock[SECONDARYSOCKET]);
1320 conn->sock[SECONDARYSOCKET] = portsock;
1322 /* this tcpconnect assignment below is a hackish work-around to make the
1323 multi interface with active FTP work - as it will not wait for a
1324 (passive) connect in Curl_is_connected().
1326 The *proper* fix is to make sure that the active connection from the
1327 server is done in a non-blocking way. Currently, it is still BLOCKING.
1329 conn->bits.tcpconnect[SECONDARYSOCKET] = TRUE;
1331 state(conn, FTP_PORT);
1335 static CURLcode ftp_state_use_pasv(struct connectdata *conn)
1337 struct ftp_conn *ftpc = &conn->proto.ftpc;
1338 CURLcode result = CURLE_OK;
1340 Here's the excecutive summary on what to do:
1342 PASV is RFC959, expect:
1343 227 Entering Passive Mode (a1,a2,a3,a4,p1,p2)
1345 LPSV is RFC1639, expect:
1346 228 Entering Long Passive Mode (4,4,a1,a2,a3,a4,2,p1,p2)
1348 EPSV is RFC2428, expect:
1349 229 Entering Extended Passive Mode (|||port|)
1353 static const char mode[][5] = { "EPSV", "PASV" };
1357 if(!conn->bits.ftp_use_epsv && conn->bits.ipv6)
1358 /* EPSV is disabled but we are connected to a IPv6 host, so we ignore the
1359 request and enable EPSV again! */
1360 conn->bits.ftp_use_epsv = TRUE;
1363 modeoff = conn->bits.ftp_use_epsv?0:1;
1365 PPSENDF(&ftpc->pp, "%s", mode[modeoff]);
1367 ftpc->count1 = modeoff;
1368 state(conn, FTP_PASV);
1369 infof(conn->data, "Connect data stream passively\n");
1374 /* REST is the last command in the chain of commands when a "head"-like
1375 request is made. Thus, if an actual transfer is to be made this is where
1376 we take off for real. */
1377 static CURLcode ftp_state_post_rest(struct connectdata *conn)
1379 CURLcode result = CURLE_OK;
1380 struct FTP *ftp = conn->data->state.proto.ftp;
1381 struct SessionHandle *data = conn->data;
1383 if(ftp->transfer != FTPTRANSFER_BODY) {
1384 /* doesn't transfer any data */
1386 /* still possibly do PRE QUOTE jobs */
1387 state(conn, FTP_RETR_PREQUOTE);
1388 result = ftp_state_quote(conn, TRUE, FTP_RETR_PREQUOTE);
1390 else if(data->set.ftp_use_port) {
1391 /* We have chosen to use the PORT (or similar) command */
1392 result = ftp_state_use_port(conn, EPRT);
1395 /* We have chosen (this is default) to use the PASV (or similar) command */
1396 if(data->set.ftp_use_pret) {
1397 /* The user has requested that we send a PRET command
1398 to prepare the server for the upcoming PASV */
1399 if(!conn->proto.ftpc.file) {
1400 PPSENDF(&conn->proto.ftpc.pp, "PRET %s",
1401 data->set.str[STRING_CUSTOMREQUEST]?
1402 data->set.str[STRING_CUSTOMREQUEST]:
1403 (data->set.ftp_list_only?"NLST":"LIST"));
1405 else if(data->set.upload) {
1406 PPSENDF(&conn->proto.ftpc.pp, "PRET STOR %s", conn->proto.ftpc.file);
1409 PPSENDF(&conn->proto.ftpc.pp, "PRET RETR %s", conn->proto.ftpc.file);
1411 state(conn, FTP_PRET);
1414 result = ftp_state_use_pasv(conn);
1420 static CURLcode ftp_state_post_size(struct connectdata *conn)
1422 CURLcode result = CURLE_OK;
1423 struct FTP *ftp = conn->data->state.proto.ftp;
1424 struct ftp_conn *ftpc = &conn->proto.ftpc;
1426 if((ftp->transfer != FTPTRANSFER_BODY) && ftpc->file) {
1427 /* if a "head"-like request is being made (on a file) */
1429 /* Determine if server can respond to REST command and therefore
1430 whether it supports range */
1431 PPSENDF(&conn->proto.ftpc.pp, "REST %d", 0);
1433 state(conn, FTP_REST);
1436 result = ftp_state_post_rest(conn);
1441 static CURLcode ftp_state_post_type(struct connectdata *conn)
1443 CURLcode result = CURLE_OK;
1444 struct FTP *ftp = conn->data->state.proto.ftp;
1445 struct ftp_conn *ftpc = &conn->proto.ftpc;
1447 if((ftp->transfer == FTPTRANSFER_INFO) && ftpc->file) {
1448 /* if a "head"-like request is being made (on a file) */
1450 /* we know ftpc->file is a valid pointer to a file name */
1451 PPSENDF(&ftpc->pp, "SIZE %s", ftpc->file);
1453 state(conn, FTP_SIZE);
1456 result = ftp_state_post_size(conn);
1461 static CURLcode ftp_state_post_listtype(struct connectdata *conn)
1463 CURLcode result = CURLE_OK;
1464 struct SessionHandle *data = conn->data;
1466 /* If this output is to be machine-parsed, the NLST command might be better
1467 to use, since the LIST command output is not specified or standard in any
1468 way. It has turned out that the NLST list output is not the same on all
1469 servers either... */
1472 if FTPFILE_NOCWD was specified, we are currently in
1473 the user's home directory, so we should add the path
1474 as argument for the LIST / NLST / or custom command.
1475 Whether the server will support this, is uncertain.
1477 The other ftp_filemethods will CWD into dir/dir/ first and
1478 then just do LIST (in that case: nothing to do here)
1480 char *cmd,*lstArg,*slashPos;
1483 if((data->set.ftp_filemethod == FTPFILE_NOCWD) &&
1485 data->state.path[0] &&
1486 strchr(data->state.path,'/')) {
1488 lstArg = strdup(data->state.path);
1490 return CURLE_OUT_OF_MEMORY;
1492 /* Check if path does not end with /, as then we cut off the file part */
1493 if(lstArg[strlen(lstArg) - 1] != '/') {
1495 /* chop off the file part if format is dir/dir/file */
1496 slashPos = strrchr(lstArg,'/');
1498 *(slashPos+1) = '\0';
1502 cmd = aprintf( "%s%s%s",
1503 data->set.str[STRING_CUSTOMREQUEST]?
1504 data->set.str[STRING_CUSTOMREQUEST]:
1505 (data->set.ftp_list_only?"NLST":"LIST"),
1507 lstArg? lstArg: "" );
1512 return CURLE_OUT_OF_MEMORY;
1515 result = Curl_pp_sendf(&conn->proto.ftpc.pp, "%s", cmd);
1522 if(result != CURLE_OK)
1525 state(conn, FTP_LIST);
1530 static CURLcode ftp_state_post_retrtype(struct connectdata *conn)
1532 CURLcode result = CURLE_OK;
1534 /* We've sent the TYPE, now we must send the list of prequote strings */
1536 result = ftp_state_quote(conn, TRUE, FTP_RETR_PREQUOTE);
1541 static CURLcode ftp_state_post_stortype(struct connectdata *conn)
1543 CURLcode result = CURLE_OK;
1545 /* We've sent the TYPE, now we must send the list of prequote strings */
1547 result = ftp_state_quote(conn, TRUE, FTP_STOR_PREQUOTE);
1552 static CURLcode ftp_state_post_mdtm(struct connectdata *conn)
1554 CURLcode result = CURLE_OK;
1555 struct FTP *ftp = conn->data->state.proto.ftp;
1556 struct SessionHandle *data = conn->data;
1557 struct ftp_conn *ftpc = &conn->proto.ftpc;
1559 /* If we have selected NOBODY and HEADER, it means that we only want file
1560 information. Which in FTP can't be much more than the file size and
1562 if(data->set.opt_no_body && ftpc->file &&
1563 ftp_need_type(conn, data->set.prefer_ascii)) {
1564 /* The SIZE command is _not_ RFC 959 specified, and therefor many servers
1565 may not support it! It is however the only way we have to get a file's
1568 ftp->transfer = FTPTRANSFER_INFO;
1569 /* this means no actual transfer will be made */
1571 /* Some servers return different sizes for different modes, and thus we
1572 must set the proper type before we check the size */
1573 result = ftp_nb_type(conn, data->set.prefer_ascii, FTP_TYPE);
1578 result = ftp_state_post_type(conn);
1583 /* This is called after the CWD commands have been done in the beginning of
1585 static CURLcode ftp_state_post_cwd(struct connectdata *conn)
1587 CURLcode result = CURLE_OK;
1588 struct SessionHandle *data = conn->data;
1589 struct ftp_conn *ftpc = &conn->proto.ftpc;
1591 /* Requested time of file or time-depended transfer? */
1592 if((data->set.get_filetime || data->set.timecondition) && ftpc->file) {
1594 /* we have requested to get the modified-time of the file, this is a white
1595 spot as the MDTM is not mentioned in RFC959 */
1596 PPSENDF(&ftpc->pp, "MDTM %s", ftpc->file);
1598 state(conn, FTP_MDTM);
1601 result = ftp_state_post_mdtm(conn);
1607 /* This is called after the TYPE and possible quote commands have been sent */
1608 static CURLcode ftp_state_ul_setup(struct connectdata *conn,
1611 CURLcode result = CURLE_OK;
1612 struct FTP *ftp = conn->data->state.proto.ftp;
1613 struct SessionHandle *data = conn->data;
1614 struct ftp_conn *ftpc = &conn->proto.ftpc;
1615 int seekerr = CURL_SEEKFUNC_OK;
1617 if((data->state.resume_from && !sizechecked) ||
1618 ((data->state.resume_from > 0) && sizechecked)) {
1619 /* we're about to continue the uploading of a file */
1620 /* 1. get already existing file's size. We use the SIZE command for this
1621 which may not exist in the server! The SIZE command is not in
1624 /* 2. This used to set REST. But since we can do append, we
1625 don't another ftp command. We just skip the source file
1626 offset and then we APPEND the rest on the file instead */
1628 /* 3. pass file-size number of bytes in the source file */
1629 /* 4. lower the infilesize counter */
1630 /* => transfer as usual */
1632 if(data->state.resume_from < 0 ) {
1633 /* Got no given size to start from, figure it out */
1634 PPSENDF(&ftpc->pp, "SIZE %s", ftpc->file);
1635 state(conn, FTP_STOR_SIZE);
1640 data->set.ftp_append = TRUE;
1642 /* Let's read off the proper amount of bytes from the input. */
1643 if(conn->seek_func) {
1644 seekerr = conn->seek_func(conn->seek_client, data->state.resume_from,
1648 if(seekerr != CURL_SEEKFUNC_OK) {
1649 if(seekerr != CURL_SEEKFUNC_CANTSEEK) {
1650 failf(data, "Could not seek stream");
1651 return CURLE_FTP_COULDNT_USE_REST;
1653 /* seekerr == CURL_SEEKFUNC_CANTSEEK (can't seek to offset) */
1655 curl_off_t passed=0;
1657 size_t readthisamountnow =
1658 (data->state.resume_from - passed > CURL_OFF_T_C(BUFSIZE)) ?
1659 BUFSIZE : curlx_sotouz(data->state.resume_from - passed);
1661 size_t actuallyread =
1662 conn->fread_func(data->state.buffer, 1, readthisamountnow,
1665 passed += actuallyread;
1666 if((actuallyread == 0) || (actuallyread > readthisamountnow)) {
1667 /* this checks for greater-than only to make sure that the
1668 CURL_READFUNC_ABORT return code still aborts */
1669 failf(data, "Failed to read data");
1670 return CURLE_FTP_COULDNT_USE_REST;
1672 } while(passed < data->state.resume_from);
1675 /* now, decrease the size of the read */
1676 if(data->set.infilesize>0) {
1677 data->set.infilesize -= data->state.resume_from;
1679 if(data->set.infilesize <= 0) {
1680 infof(data, "File already completely uploaded\n");
1682 /* no data to transfer */
1683 Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
1685 /* Set ->transfer so that we won't get any error in
1686 * ftp_done() because we didn't transfer anything! */
1687 ftp->transfer = FTPTRANSFER_NONE;
1689 state(conn, FTP_STOP);
1693 /* we've passed, proceed as normal */
1696 PPSENDF(&ftpc->pp, data->set.ftp_append?"APPE %s":"STOR %s",
1699 state(conn, FTP_STOR);
1704 static CURLcode ftp_state_quote(struct connectdata *conn,
1708 CURLcode result = CURLE_OK;
1709 struct SessionHandle *data = conn->data;
1710 struct FTP *ftp = data->state.proto.ftp;
1711 struct ftp_conn *ftpc = &conn->proto.ftpc;
1713 struct curl_slist *item;
1718 item = data->set.quote;
1720 case FTP_RETR_PREQUOTE:
1721 case FTP_STOR_PREQUOTE:
1722 item = data->set.prequote;
1725 item = data->set.postquote;
1731 * 'count1' to iterate over the commands to send
1732 * 'count2' to store wether to allow commands to fail
1743 /* Skip count1 items in the linked list */
1744 while((i< ftpc->count1) && item) {
1749 char *cmd = item->data;
1752 ftpc->count2 = 1; /* the sent command is allowed to fail */
1755 ftpc->count2 = 0; /* failure means cancel operation */
1757 PPSENDF(&ftpc->pp, "%s", cmd);
1758 state(conn, instate);
1764 /* No more quote to send, continue to ... */
1768 result = ftp_state_cwd(conn);
1770 case FTP_RETR_PREQUOTE:
1771 if(ftp->transfer != FTPTRANSFER_BODY)
1772 state(conn, FTP_STOP);
1774 if(ftpc->known_filesize != -1) {
1775 Curl_pgrsSetDownloadSize(data, ftpc->known_filesize);
1776 result = ftp_state_post_retr_size(conn, ftpc->known_filesize);
1779 PPSENDF(&ftpc->pp, "SIZE %s", ftpc->file);
1780 state(conn, FTP_RETR_SIZE);
1784 case FTP_STOR_PREQUOTE:
1785 result = ftp_state_ul_setup(conn, FALSE);
1795 /* called from ftp_state_pasv_resp to switch to PASV in case of EPSV
1797 static CURLcode ftp_epsv_disable(struct connectdata *conn)
1799 CURLcode result = CURLE_OK;
1800 infof(conn->data, "got positive EPSV response, but can't connect. "
1801 "Disabling EPSV\n");
1802 /* disable it for next transfer */
1803 conn->bits.ftp_use_epsv = FALSE;
1804 conn->data->state.errorbuf = FALSE; /* allow error message to get
1806 PPSENDF(&conn->proto.ftpc.pp, "PASV", NULL);
1807 conn->proto.ftpc.count1++;
1808 /* remain in the FTP_PASV state */
1812 static CURLcode ftp_state_pasv_resp(struct connectdata *conn,
1815 struct ftp_conn *ftpc = &conn->proto.ftpc;
1817 struct SessionHandle *data=conn->data;
1818 Curl_addrinfo *conninfo;
1819 struct Curl_dns_entry *addr=NULL;
1821 unsigned short connectport; /* the local port connect() should use! */
1822 unsigned short newport=0; /* remote port */
1825 /* newhost must be able to hold a full IP-style address in ASCII, which
1826 in the IPv6 case means 5*8-1 = 39 letters */
1827 #define NEWHOST_BUFSIZE 48
1828 char newhost[NEWHOST_BUFSIZE];
1829 char *str=&data->state.buffer[4]; /* start on the first letter */
1831 if((ftpc->count1 == 0) &&
1833 /* positive EPSV response */
1834 char *ptr = strchr(str, '(');
1839 if(5 == sscanf(ptr, "%c%c%c%u%c",
1845 const char sep1 = separator[0];
1848 /* The four separators should be identical, or else this is an oddly
1849 formatted reply and we bail out immediately. */
1850 for(i=1; i<4; i++) {
1851 if(separator[i] != sep1) {
1852 ptr=NULL; /* set to NULL to signal error */
1857 failf(data, "Illegal port number in EPSV reply");
1858 return CURLE_FTP_WEIRD_PASV_REPLY;
1861 newport = (unsigned short)(num & 0xffff);
1863 if(conn->bits.tunnel_proxy ||
1864 conn->proxytype == CURLPROXY_SOCKS5 ||
1865 conn->proxytype == CURLPROXY_SOCKS5_HOSTNAME ||
1866 conn->proxytype == CURLPROXY_SOCKS4 ||
1867 conn->proxytype == CURLPROXY_SOCKS4A)
1868 /* proxy tunnel -> use other host info because ip_addr_str is the
1869 proxy address not the ftp host */
1870 snprintf(newhost, sizeof(newhost), "%s", conn->host.name);
1872 /* use the same IP we are already connected to */
1873 snprintf(newhost, NEWHOST_BUFSIZE, "%s", conn->ip_addr_str);
1880 failf(data, "Weirdly formatted EPSV reply");
1881 return CURLE_FTP_WEIRD_PASV_REPLY;
1884 else if((ftpc->count1 == 1) &&
1886 /* positive PASV response */
1891 * Scan for a sequence of six comma-separated numbers and use them as
1892 * IP+port indicators.
1894 * Found reply-strings include:
1895 * "227 Entering Passive Mode (127,0,0,1,4,51)"
1896 * "227 Data transfer will passively listen to 127,0,0,1,4,51"
1897 * "227 Entering passive mode. 127,0,0,1,4,51"
1900 if(6 == sscanf(str, "%d,%d,%d,%d,%d,%d",
1901 &ip[0], &ip[1], &ip[2], &ip[3],
1902 &port[0], &port[1]))
1908 failf(data, "Couldn't interpret the 227-response");
1909 return CURLE_FTP_WEIRD_227_FORMAT;
1912 /* we got OK from server */
1913 if(data->set.ftp_skip_ip) {
1914 /* told to ignore the remotely given IP but instead use the one we used
1915 for the control connection */
1916 infof(data, "Skips %d.%d.%d.%d for data connection, uses %s instead\n",
1917 ip[0], ip[1], ip[2], ip[3],
1919 if(conn->bits.tunnel_proxy ||
1920 conn->proxytype == CURLPROXY_SOCKS5 ||
1921 conn->proxytype == CURLPROXY_SOCKS5_HOSTNAME ||
1922 conn->proxytype == CURLPROXY_SOCKS4 ||
1923 conn->proxytype == CURLPROXY_SOCKS4A)
1924 /* proxy tunnel -> use other host info because ip_addr_str is the
1925 proxy address not the ftp host */
1926 snprintf(newhost, sizeof(newhost), "%s", conn->host.name);
1928 snprintf(newhost, sizeof(newhost), "%s", conn->ip_addr_str);
1931 snprintf(newhost, sizeof(newhost),
1932 "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
1933 newport = (unsigned short)(((port[0]<<8) + port[1]) & 0xffff);
1935 else if(ftpc->count1 == 0) {
1936 /* EPSV failed, move on to PASV */
1938 /* disable it for next transfer */
1939 conn->bits.ftp_use_epsv = FALSE;
1940 infof(data, "disabling EPSV usage\n");
1942 PPSENDF(&ftpc->pp, "PASV", NULL);
1944 /* remain in the FTP_PASV state */
1948 failf(data, "Bad PASV/EPSV response: %03d", ftpcode);
1949 return CURLE_FTP_WEIRD_PASV_REPLY;
1952 if(data->set.str[STRING_PROXY] && *data->set.str[STRING_PROXY]) {
1954 * This is a tunnel through a http proxy and we need to connect to the
1957 * We don't want to rely on a former host lookup that might've expired
1958 * now, instead we remake the lookup here and now!
1960 rc = Curl_resolv(conn, conn->proxy.name, (int)conn->port, &addr);
1961 if(rc == CURLRESOLV_PENDING)
1962 /* BLOCKING, ignores the return code but 'addr' will be NULL in
1964 (void)Curl_resolver_wait_resolv(conn, &addr);
1967 (unsigned short)conn->port; /* we connect to the proxy's port */
1970 failf(data, "Can't resolve proxy host %s:%hu",
1971 conn->proxy.name, connectport);
1972 return CURLE_FTP_CANT_GET_HOST;
1976 /* normal, direct, ftp connection */
1977 rc = Curl_resolv(conn, newhost, newport, &addr);
1978 if(rc == CURLRESOLV_PENDING)
1980 (void)Curl_resolver_wait_resolv(conn, &addr);
1982 connectport = newport; /* we connect to the remote port */
1985 failf(data, "Can't resolve new host %s:%hu", newhost, connectport);
1986 return CURLE_FTP_CANT_GET_HOST;
1990 result = Curl_connecthost(conn,
1992 &conn->sock[SECONDARYSOCKET],
1996 Curl_resolv_unlock(data, addr); /* we're done using this address */
1999 if(ftpc->count1 == 0 && ftpcode == 229)
2000 return ftp_epsv_disable(conn);
2005 conn->bits.tcpconnect[SECONDARYSOCKET] = connected;
2008 * When this is used from the multi interface, this might've returned with
2009 * the 'connected' set to FALSE and thus we are now awaiting a non-blocking
2010 * connect to connect and we should not be "hanging" here waiting.
2013 if(data->set.verbose)
2014 /* this just dumps information about this second connection */
2015 ftp_pasv_verbose(conn, conninfo, newhost, connectport);
2017 switch(conn->proxytype) {
2018 /* FIX: this MUST wait for a proper connect first if 'connected' is
2020 case CURLPROXY_SOCKS5:
2021 case CURLPROXY_SOCKS5_HOSTNAME:
2022 result = Curl_SOCKS5(conn->proxyuser, conn->proxypasswd, newhost, newport,
2023 SECONDARYSOCKET, conn);
2025 case CURLPROXY_SOCKS4:
2026 result = Curl_SOCKS4(conn->proxyuser, newhost, newport,
2027 SECONDARYSOCKET, conn, FALSE);
2029 case CURLPROXY_SOCKS4A:
2030 result = Curl_SOCKS4(conn->proxyuser, newhost, newport,
2031 SECONDARYSOCKET, conn, TRUE);
2033 case CURLPROXY_HTTP:
2034 case CURLPROXY_HTTP_1_0:
2035 /* do nothing here. handled later. */
2038 failf(data, "unknown proxytype option given");
2039 result = CURLE_COULDNT_CONNECT;
2044 if(ftpc->count1 == 0 && ftpcode == 229)
2045 return ftp_epsv_disable(conn);
2049 if(conn->bits.tunnel_proxy && conn->bits.httpproxy) {
2050 /* FIX: this MUST wait for a proper connect first if 'connected' is
2054 /* We want "seamless" FTP operations through HTTP proxy tunnel */
2056 /* Curl_proxyCONNECT is based on a pointer to a struct HTTP at the member
2057 * conn->proto.http; we want FTP through HTTP and we have to change the
2058 * member temporarily for connecting to the HTTP proxy. After
2059 * Curl_proxyCONNECT we have to set back the member to the original struct
2062 struct HTTP http_proxy;
2063 struct FTP *ftp_save = data->state.proto.ftp;
2064 memset(&http_proxy, 0, sizeof(http_proxy));
2065 data->state.proto.http = &http_proxy;
2067 result = Curl_proxyCONNECT(conn, SECONDARYSOCKET, newhost, newport);
2069 data->state.proto.ftp = ftp_save;
2074 if(conn->tunnel_state[SECONDARYSOCKET] != TUNNEL_COMPLETE) {
2075 /* the CONNECT procedure is not complete, the tunnel is not yet up */
2076 state(conn, FTP_STOP); /* this phase is completed */
2077 conn->bits.tcpconnect[SECONDARYSOCKET] = FALSE;
2083 conn->bits.tcpconnect[SECONDARYSOCKET] = TRUE;
2085 conn->bits.do_more = TRUE;
2086 state(conn, FTP_STOP); /* this phase is completed */
2091 static CURLcode ftp_state_port_resp(struct connectdata *conn,
2094 struct SessionHandle *data = conn->data;
2095 struct ftp_conn *ftpc = &conn->proto.ftpc;
2096 ftpport fcmd = (ftpport)ftpc->count1;
2097 CURLcode result = CURLE_OK;
2099 if(ftpcode != 200) {
2100 /* the command failed */
2103 infof(data, "disabling EPRT usage\n");
2104 conn->bits.ftp_use_eprt = FALSE;
2109 failf(data, "Failed to do PORT");
2110 result = CURLE_FTP_PORT_FAILED;
2114 result = ftp_state_use_port(conn, fcmd);
2117 infof(data, "Connect data stream actively\n");
2118 state(conn, FTP_STOP); /* end of DO phase */
2119 result = ftp_dophase_done(conn, FALSE);
2125 static CURLcode ftp_state_mdtm_resp(struct connectdata *conn,
2128 CURLcode result = CURLE_OK;
2129 struct SessionHandle *data=conn->data;
2130 struct FTP *ftp = data->state.proto.ftp;
2131 struct ftp_conn *ftpc = &conn->proto.ftpc;
2136 /* we got a time. Format should be: "YYYYMMDDHHMMSS[.sss]" where the
2137 last .sss part is optional and means fractions of a second */
2138 int year, month, day, hour, minute, second;
2139 char *buf = data->state.buffer;
2140 if(6 == sscanf(buf+4, "%04d%02d%02d%02d%02d%02d",
2141 &year, &month, &day, &hour, &minute, &second)) {
2142 /* we have a time, reformat it */
2143 time_t secs=time(NULL);
2144 /* using the good old yacc/bison yuck */
2145 snprintf(buf, sizeof(conn->data->state.buffer),
2146 "%04d%02d%02d %02d:%02d:%02d GMT",
2147 year, month, day, hour, minute, second);
2148 /* now, convert this into a time() value: */
2149 data->info.filetime = (long)curl_getdate(buf, &secs);
2152 #ifdef CURL_FTP_HTTPSTYLE_HEAD
2153 /* If we asked for a time of the file and we actually got one as well,
2154 we "emulate" a HTTP-style header in our output. */
2156 if(data->set.opt_no_body &&
2158 data->set.get_filetime &&
2159 (data->info.filetime>=0) ) {
2160 time_t filetime = (time_t)data->info.filetime;
2162 const struct tm *tm = &buffer;
2164 result = Curl_gmtime(filetime, &buffer);
2168 /* format: "Tue, 15 Nov 1994 12:45:26" */
2169 snprintf(buf, BUFSIZE-1,
2170 "Last-Modified: %s, %02d %s %4d %02d:%02d:%02d GMT\r\n",
2171 Curl_wkday[tm->tm_wday?tm->tm_wday-1:6],
2173 Curl_month[tm->tm_mon],
2178 result = Curl_client_write(conn, CLIENTWRITE_BOTH, buf, 0);
2181 } /* end of a ridiculous amount of conditionals */
2186 infof(data, "unsupported MDTM reply format\n");
2188 case 550: /* "No such file or directory" */
2189 failf(data, "Given file does not exist");
2190 result = CURLE_FTP_COULDNT_RETR_FILE;
2194 if(data->set.timecondition) {
2195 if((data->info.filetime > 0) && (data->set.timevalue > 0)) {
2196 switch(data->set.timecondition) {
2197 case CURL_TIMECOND_IFMODSINCE:
2199 if(data->info.filetime <= data->set.timevalue) {
2200 infof(data, "The requested document is not new enough\n");
2201 ftp->transfer = FTPTRANSFER_NONE; /* mark to not transfer data */
2202 data->info.timecond = TRUE;
2203 state(conn, FTP_STOP);
2207 case CURL_TIMECOND_IFUNMODSINCE:
2208 if(data->info.filetime > data->set.timevalue) {
2209 infof(data, "The requested document is not old enough\n");
2210 ftp->transfer = FTPTRANSFER_NONE; /* mark to not transfer data */
2211 data->info.timecond = TRUE;
2212 state(conn, FTP_STOP);
2219 infof(data, "Skipping time comparison\n");
2224 result = ftp_state_post_mdtm(conn);
2229 static CURLcode ftp_state_type_resp(struct connectdata *conn,
2233 CURLcode result = CURLE_OK;
2234 struct SessionHandle *data=conn->data;
2236 if(ftpcode/100 != 2) {
2237 /* "sasserftpd" and "(u)r(x)bot ftpd" both responds with 226 after a
2238 successful 'TYPE I'. While that is not as RFC959 says, it is still a
2239 positive response code and we allow that. */
2240 failf(data, "Couldn't set desired mode");
2241 return CURLE_FTP_COULDNT_SET_TYPE;
2244 infof(data, "Got a %03d response code instead of the assumed 200\n",
2247 if(instate == FTP_TYPE)
2248 result = ftp_state_post_type(conn);
2249 else if(instate == FTP_LIST_TYPE)
2250 result = ftp_state_post_listtype(conn);
2251 else if(instate == FTP_RETR_TYPE)
2252 result = ftp_state_post_retrtype(conn);
2253 else if(instate == FTP_STOR_TYPE)
2254 result = ftp_state_post_stortype(conn);
2259 static CURLcode ftp_state_post_retr_size(struct connectdata *conn,
2260 curl_off_t filesize)
2262 CURLcode result = CURLE_OK;
2263 struct SessionHandle *data=conn->data;
2264 struct FTP *ftp = data->state.proto.ftp;
2265 struct ftp_conn *ftpc = &conn->proto.ftpc;
2267 if(data->set.max_filesize && (filesize > data->set.max_filesize)) {
2268 failf(data, "Maximum file size exceeded");
2269 return CURLE_FILESIZE_EXCEEDED;
2271 ftp->downloadsize = filesize;
2273 if(data->state.resume_from) {
2274 /* We always (attempt to) get the size of downloads, so it is done before
2275 this even when not doing resumes. */
2276 if(filesize == -1) {
2277 infof(data, "ftp server doesn't support SIZE\n");
2278 /* We couldn't get the size and therefore we can't know if there really
2279 is a part of the file left to get, although the server will just
2280 close the connection when we start the connection so it won't cause
2281 us any harm, just not make us exit as nicely. */
2284 /* We got a file size report, so we check that there actually is a
2285 part of the file left to get, or else we go home. */
2286 if(data->state.resume_from< 0) {
2287 /* We're supposed to download the last abs(from) bytes */
2288 if(filesize < -data->state.resume_from) {
2289 failf(data, "Offset (%" FORMAT_OFF_T
2290 ") was beyond file size (%" FORMAT_OFF_T ")",
2291 data->state.resume_from, filesize);
2292 return CURLE_BAD_DOWNLOAD_RESUME;
2294 /* convert to size to download */
2295 ftp->downloadsize = -data->state.resume_from;
2296 /* download from where? */
2297 data->state.resume_from = filesize - ftp->downloadsize;
2300 if(filesize < data->state.resume_from) {
2301 failf(data, "Offset (%" FORMAT_OFF_T
2302 ") was beyond file size (%" FORMAT_OFF_T ")",
2303 data->state.resume_from, filesize);
2304 return CURLE_BAD_DOWNLOAD_RESUME;
2306 /* Now store the number of bytes we are expected to download */
2307 ftp->downloadsize = filesize-data->state.resume_from;
2311 if(ftp->downloadsize == 0) {
2312 /* no data to transfer */
2313 Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
2314 infof(data, "File already completely downloaded\n");
2316 /* Set ->transfer so that we won't get any error in ftp_done()
2317 * because we didn't transfer the any file */
2318 ftp->transfer = FTPTRANSFER_NONE;
2319 state(conn, FTP_STOP);
2323 /* Set resume file transfer offset */
2324 infof(data, "Instructs server to resume from offset %" FORMAT_OFF_T
2325 "\n", data->state.resume_from);
2327 PPSENDF(&ftpc->pp, "REST %" FORMAT_OFF_T, data->state.resume_from);
2329 state(conn, FTP_RETR_REST);
2334 PPSENDF(&ftpc->pp, "RETR %s", ftpc->file);
2335 state(conn, FTP_RETR);
2341 static CURLcode ftp_state_size_resp(struct connectdata *conn,
2345 CURLcode result = CURLE_OK;
2346 struct SessionHandle *data=conn->data;
2347 curl_off_t filesize;
2348 char *buf = data->state.buffer;
2350 /* get the size from the ascii string: */
2351 filesize = (ftpcode == 213)?curlx_strtoofft(buf+4, NULL, 0):-1;
2353 if(instate == FTP_SIZE) {
2354 #ifdef CURL_FTP_HTTPSTYLE_HEAD
2355 if(-1 != filesize) {
2356 snprintf(buf, sizeof(data->state.buffer),
2357 "Content-Length: %" FORMAT_OFF_T "\r\n", filesize);
2358 result = Curl_client_write(conn, CLIENTWRITE_BOTH, buf, 0);
2363 Curl_pgrsSetDownloadSize(data, filesize);
2364 result = ftp_state_post_size(conn);
2366 else if(instate == FTP_RETR_SIZE) {
2367 Curl_pgrsSetDownloadSize(data, filesize);
2368 result = ftp_state_post_retr_size(conn, filesize);
2370 else if(instate == FTP_STOR_SIZE) {
2371 data->state.resume_from = filesize;
2372 result = ftp_state_ul_setup(conn, TRUE);
2378 static CURLcode ftp_state_rest_resp(struct connectdata *conn,
2382 CURLcode result = CURLE_OK;
2383 struct ftp_conn *ftpc = &conn->proto.ftpc;
2388 #ifdef CURL_FTP_HTTPSTYLE_HEAD
2389 if(ftpcode == 350) {
2390 char buffer[24]= { "Accept-ranges: bytes\r\n" };
2391 result = Curl_client_write(conn, CLIENTWRITE_BOTH, buffer, 0);
2396 result = ftp_state_post_rest(conn);
2400 if(ftpcode != 350) {
2401 failf(conn->data, "Couldn't use REST");
2402 result = CURLE_FTP_COULDNT_USE_REST;
2405 PPSENDF(&ftpc->pp, "RETR %s", ftpc->file);
2406 state(conn, FTP_RETR);
2414 static CURLcode ftp_state_stor_resp(struct connectdata *conn,
2415 int ftpcode, ftpstate instate)
2417 CURLcode result = CURLE_OK;
2418 struct SessionHandle *data = conn->data;
2421 failf(data, "Failed FTP upload: %0d", ftpcode);
2422 state(conn, FTP_STOP);
2423 /* oops, we never close the sockets! */
2424 return CURLE_UPLOAD_FAILED;
2427 conn->proto.ftpc.state_saved = instate;
2429 /* PORT means we are now awaiting the server to connect to us. */
2430 if(data->set.ftp_use_port) {
2433 result = AllowServerConnect(conn, &connected);
2438 struct ftp_conn *ftpc = &conn->proto.ftpc;
2439 infof(data, "Data conn was not available immediately\n");
2440 ftpc->wait_data_conn = TRUE;
2446 return InitiateTransfer(conn);
2449 /* for LIST and RETR responses */
2450 static CURLcode ftp_state_get_resp(struct connectdata *conn,
2454 CURLcode result = CURLE_OK;
2455 struct SessionHandle *data = conn->data;
2456 struct FTP *ftp = data->state.proto.ftp;
2457 char *buf = data->state.buffer;
2459 if((ftpcode == 150) || (ftpcode == 125)) {
2463 150 Opening BINARY mode data connection for /etc/passwd (2241
2464 bytes). (ok, the file is being transferred)
2467 150 Opening ASCII mode data connection for /bin/ls
2470 150 ASCII data connection for /bin/ls (137.167.104.91,37445) (0 bytes).
2473 150 Opening ASCII mode data connection for [file] (0.0.0.0,0) (545 bytes)
2476 125 Data connection already open; Transfer starting. */
2478 curl_off_t size=-1; /* default unknown size */
2482 * It appears that there are FTP-servers that return size 0 for files when
2483 * SIZE is used on the file while being in BINARY mode. To work around
2484 * that (stupid) behavior, we attempt to parse the RETR response even if
2485 * the SIZE returned size zero.
2487 * Debugging help from Salvatore Sorrentino on February 26, 2003.
2490 if((instate != FTP_LIST) &&
2491 !data->set.prefer_ascii &&
2492 (ftp->downloadsize < 1)) {
2494 * It seems directory listings either don't show the size or very
2495 * often uses size 0 anyway. ASCII transfers may very well turn out
2496 * that the transferred amount of data is not the same as this line
2497 * tells, why using this number in those cases only confuses us.
2499 * Example D above makes this parsing a little tricky */
2501 bytes=strstr(buf, " bytes");
2503 long in=(long)(bytes-buf);
2504 /* this is a hint there is size information in there! ;-) */
2506 /* scan for the left parenthesis and break there */
2509 /* skip only digits */
2510 if(!ISDIGIT(*bytes)) {
2514 /* one more estep backwards */
2517 /* if we have nothing but digits: */
2519 /* get the number! */
2520 size = curlx_strtoofft(bytes, NULL, 0);
2524 else if(ftp->downloadsize > -1)
2525 size = ftp->downloadsize;
2527 if(size > data->req.maxdownload && data->req.maxdownload > 0)
2528 size = data->req.size = data->req.maxdownload;
2529 else if((instate != FTP_LIST) && (data->set.prefer_ascii))
2530 size = -1; /* kludge for servers that understate ASCII mode file size */
2532 infof(data, "Maxdownload = %" FORMAT_OFF_T "\n", data->req.maxdownload);
2534 if(instate != FTP_LIST)
2535 infof(data, "Getting file with size: %" FORMAT_OFF_T "\n", size);
2538 conn->proto.ftpc.state_saved = instate;
2539 conn->proto.ftpc.retr_size_saved = size;
2541 if(data->set.ftp_use_port) {
2544 result = AllowServerConnect(conn, &connected);
2549 struct ftp_conn *ftpc = &conn->proto.ftpc;
2550 infof(data, "Data conn was not available immediately\n");
2551 state(conn, FTP_STOP);
2552 ftpc->wait_data_conn = TRUE;
2556 return InitiateTransfer(conn);
2559 if((instate == FTP_LIST) && (ftpcode == 450)) {
2560 /* simply no matching files in the dir listing */
2561 ftp->transfer = FTPTRANSFER_NONE; /* don't download anything */
2562 state(conn, FTP_STOP); /* this phase is over */
2565 failf(data, "RETR response: %03d", ftpcode);
2566 return instate == FTP_RETR && ftpcode == 550?
2567 CURLE_REMOTE_FILE_NOT_FOUND:
2568 CURLE_FTP_COULDNT_RETR_FILE;
2575 /* after USER, PASS and ACCT */
2576 static CURLcode ftp_state_loggedin(struct connectdata *conn)
2578 CURLcode result = CURLE_OK;
2581 if(conn->data->set.krb) {
2582 /* We may need to issue a KAUTH here to have access to the files
2583 * do it if user supplied a password
2585 if(conn->passwd && *conn->passwd) {
2587 result = Curl_krb_kauth(conn);
2593 if(conn->ssl[FIRSTSOCKET].use) {
2594 /* PBSZ = PROTECTION BUFFER SIZE.
2596 The 'draft-murray-auth-ftp-ssl' (draft 12, page 7) says:
2598 Specifically, the PROT command MUST be preceded by a PBSZ
2599 command and a PBSZ command MUST be preceded by a successful
2600 security data exchange (the TLS negotiation in this case)
2602 ... (and on page 8):
2604 Thus the PBSZ command must still be issued, but must have a
2605 parameter of '0' to indicate that no buffering is taking place
2606 and the data connection should not be encapsulated.
2608 PPSENDF(&conn->proto.ftpc.pp, "PBSZ %d", 0);
2609 state(conn, FTP_PBSZ);
2612 result = ftp_state_pwd(conn);
2617 /* for USER and PASS responses */
2618 static CURLcode ftp_state_user_resp(struct connectdata *conn,
2622 CURLcode result = CURLE_OK;
2623 struct SessionHandle *data = conn->data;
2624 struct FTP *ftp = data->state.proto.ftp;
2625 struct ftp_conn *ftpc = &conn->proto.ftpc;
2626 (void)instate; /* no use for this yet */
2628 /* some need password anyway, and others just return 2xx ignored */
2629 if((ftpcode == 331) && (ftpc->state == FTP_USER)) {
2630 /* 331 Password required for ...
2631 (the server requires to send the user's password too) */
2632 PPSENDF(&ftpc->pp, "PASS %s", ftp->passwd?ftp->passwd:"");
2633 state(conn, FTP_PASS);
2635 else if(ftpcode/100 == 2) {
2636 /* 230 User ... logged in.
2637 (the user logged in with or without password) */
2638 result = ftp_state_loggedin(conn);
2640 else if(ftpcode == 332) {
2641 if(data->set.str[STRING_FTP_ACCOUNT]) {
2642 PPSENDF(&ftpc->pp, "ACCT %s", data->set.str[STRING_FTP_ACCOUNT]);
2643 state(conn, FTP_ACCT);
2646 failf(data, "ACCT requested but none available");
2647 result = CURLE_LOGIN_DENIED;
2651 /* All other response codes, like:
2653 530 User ... access denied
2654 (the server denies to log the specified user) */
2656 if(conn->data->set.str[STRING_FTP_ALTERNATIVE_TO_USER] &&
2657 !conn->data->state.ftp_trying_alternative) {
2658 /* Ok, USER failed. Let's try the supplied command. */
2659 PPSENDF(&conn->proto.ftpc.pp, "%s",
2660 conn->data->set.str[STRING_FTP_ALTERNATIVE_TO_USER]);
2661 conn->data->state.ftp_trying_alternative = TRUE;
2662 state(conn, FTP_USER);
2666 failf(data, "Access denied: %03d", ftpcode);
2667 result = CURLE_LOGIN_DENIED;
2673 /* for ACCT response */
2674 static CURLcode ftp_state_acct_resp(struct connectdata *conn,
2677 CURLcode result = CURLE_OK;
2678 struct SessionHandle *data = conn->data;
2679 if(ftpcode != 230) {
2680 failf(data, "ACCT rejected by server: %03d", ftpcode);
2681 result = CURLE_FTP_WEIRD_PASS_REPLY; /* FIX */
2684 result = ftp_state_loggedin(conn);
2690 static CURLcode ftp_statemach_act(struct connectdata *conn)
2693 curl_socket_t sock = conn->sock[FIRSTSOCKET];
2694 struct SessionHandle *data=conn->data;
2696 struct ftp_conn *ftpc = &conn->proto.ftpc;
2697 struct pingpong *pp = &ftpc->pp;
2698 static const char ftpauth[][4] = { "SSL", "TLS" };
2702 return Curl_pp_flushsend(pp);
2704 result = ftp_readresp(sock, pp, &ftpcode, &nread);
2709 /* we have now received a full FTP server response */
2710 switch(ftpc->state) {
2712 if(ftpcode != 220) {
2713 failf(data, "Got a %03d ftp-server response when 220 was expected",
2715 return CURLE_FTP_WEIRD_SERVER_REPLY;
2718 /* We have received a 220 response fine, now we proceed. */
2719 #if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
2721 /* If not anonymous login, try a secure login. Note that this
2722 procedure is still BLOCKING. */
2724 Curl_sec_request_prot(conn, "private");
2725 /* We set private first as default, in case the line below fails to
2726 set a valid level */
2727 Curl_sec_request_prot(conn, data->set.str[STRING_KRB_LEVEL]);
2729 if(Curl_sec_login(conn) != CURLE_OK)
2730 infof(data, "Logging in with password in cleartext!\n");
2732 infof(data, "Authentication successful\n");
2736 if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
2737 /* We don't have a SSL/TLS connection yet, but FTPS is
2738 requested. Try a FTPS connection now */
2741 switch(data->set.ftpsslauth) {
2742 case CURLFTPAUTH_DEFAULT:
2743 case CURLFTPAUTH_SSL:
2744 ftpc->count2 = 1; /* add one to get next */
2747 case CURLFTPAUTH_TLS:
2748 ftpc->count2 = -1; /* subtract one to get next */
2752 failf(data, "unsupported parameter to CURLOPT_FTPSSLAUTH: %d",
2753 (int)data->set.ftpsslauth);
2754 return CURLE_UNKNOWN_OPTION; /* we don't know what to do */
2756 PPSENDF(&ftpc->pp, "AUTH %s", ftpauth[ftpc->count1]);
2757 state(conn, FTP_AUTH);
2760 result = ftp_state_user(conn);
2768 /* we have gotten the response to a previous AUTH command */
2770 /* RFC2228 (page 5) says:
2772 * If the server is willing to accept the named security mechanism,
2773 * and does not require any security data, it must respond with
2774 * reply code 234/334.
2777 if((ftpcode == 234) || (ftpcode == 334)) {
2778 /* Curl_ssl_connect is BLOCKING */
2779 result = Curl_ssl_connect(conn, FIRSTSOCKET);
2780 if(CURLE_OK == result) {
2781 conn->ssl[SECONDARYSOCKET].use = FALSE; /* clear-text data */
2782 result = ftp_state_user(conn);
2785 else if(ftpc->count3 < 1) {
2787 ftpc->count1 += ftpc->count2; /* get next attempt */
2788 result = Curl_pp_sendf(&ftpc->pp, "AUTH %s", ftpauth[ftpc->count1]);
2789 /* remain in this same state */
2792 if(data->set.use_ssl > CURLUSESSL_TRY)
2793 /* we failed and CURLUSESSL_CONTROL or CURLUSESSL_ALL is set */
2794 result = CURLE_USE_SSL_FAILED;
2796 /* ignore the failure and continue */
2797 result = ftp_state_user(conn);
2806 result = ftp_state_user_resp(conn, ftpcode, ftpc->state);
2810 result = ftp_state_acct_resp(conn, ftpcode);
2814 PPSENDF(&ftpc->pp, "PROT %c",
2815 data->set.use_ssl == CURLUSESSL_CONTROL ? 'C' : 'P');
2816 state(conn, FTP_PROT);
2821 if(ftpcode/100 == 2)
2822 /* We have enabled SSL for the data connection! */
2823 conn->ssl[SECONDARYSOCKET].use =
2824 (data->set.use_ssl != CURLUSESSL_CONTROL) ? TRUE : FALSE;
2825 /* FTP servers typically responds with 500 if they decide to reject
2827 else if(data->set.use_ssl > CURLUSESSL_CONTROL)
2828 /* we failed and bails out */
2829 return CURLE_USE_SSL_FAILED;
2831 if(data->set.ftp_ccc) {
2832 /* CCC - Clear Command Channel
2834 PPSENDF(&ftpc->pp, "CCC", NULL);
2835 state(conn, FTP_CCC);
2838 result = ftp_state_pwd(conn);
2846 /* First shut down the SSL layer (note: this call will block) */
2847 result = Curl_ssl_shutdown(conn, FIRSTSOCKET);
2850 failf(conn->data, "Failed to clear the command channel (CCC)");
2855 /* Then continue as normal */
2856 result = ftp_state_pwd(conn);
2862 if(ftpcode == 257) {
2863 char *ptr=&data->state.buffer[4]; /* start on the first letter */
2867 dir = malloc(nread + 1);
2869 return CURLE_OUT_OF_MEMORY;
2871 /* Reply format is like
2872 257<space>"<directory-name>"<space><commentary> and the RFC959
2875 The directory name can contain any character; embedded
2876 double-quotes should be escaped by double-quotes (the
2877 "quote-doubling" convention).
2880 /* it started good */
2882 for(store = dir; *ptr;) {
2884 if('\"' == ptr[1]) {
2885 /* "quote-doubling" */
2891 *store = '\0'; /* zero terminate */
2892 break; /* get out of this loop */
2901 /* If the path name does not look like an absolute path (i.e.: it
2902 does not start with a '/'), we probably need some server-dependent
2903 adjustments. For example, this is the case when connecting to
2904 an OS400 FTP server: this server supports two name syntaxes,
2905 the default one being incompatible with standard pathes. In
2906 addition, this server switches automatically to the regular path
2907 syntax when one is encountered in a command: this results in
2908 having an entrypath in the wrong syntax when later used in CWD.
2909 The method used here is to check the server OS: we do it only
2910 if the path name looks strange to minimize overhead on other
2913 if(!ftpc->server_os && dir[0] != '/') {
2915 result = Curl_pp_sendf(&ftpc->pp, "SYST", NULL);
2916 if(result != CURLE_OK) {
2920 Curl_safefree(ftpc->entrypath);
2921 ftpc->entrypath = dir; /* remember this */
2922 infof(data, "Entry path is '%s'\n", ftpc->entrypath);
2923 /* also save it where getinfo can access it: */
2924 data->state.most_recent_ftp_entrypath = ftpc->entrypath;
2925 state(conn, FTP_SYST);
2929 Curl_safefree(ftpc->entrypath);
2930 ftpc->entrypath = dir; /* remember this */
2931 infof(data, "Entry path is '%s'\n", ftpc->entrypath);
2932 /* also save it where getinfo can access it: */
2933 data->state.most_recent_ftp_entrypath = ftpc->entrypath;
2936 /* couldn't get the path */
2938 infof(data, "Failed to figure out path\n");
2941 state(conn, FTP_STOP); /* we are done with the CONNECT phase! */
2942 DEBUGF(infof(data, "protocol connect phase DONE\n"));
2946 if(ftpcode == 215) {
2947 char *ptr=&data->state.buffer[4]; /* start on the first letter */
2951 os = malloc(nread + 1);
2953 return CURLE_OUT_OF_MEMORY;
2955 /* Reply format is like
2956 215<space><OS-name><space><commentary>
2960 for(store = os; *ptr && *ptr != ' ';)
2962 *store = '\0'; /* zero terminate */
2964 /* Check for special servers here. */
2966 if(strequal(os, "OS/400")) {
2967 /* Force OS400 name format 1. */
2968 result = Curl_pp_sendf(&ftpc->pp, "SITE NAMEFMT 1", NULL);
2969 if(result != CURLE_OK) {
2973 /* remember target server OS */
2974 Curl_safefree(ftpc->server_os);
2975 ftpc->server_os = os;
2976 state(conn, FTP_NAMEFMT);
2980 /* Nothing special for the target server. */
2981 /* remember target server OS */
2982 Curl_safefree(ftpc->server_os);
2983 ftpc->server_os = os;
2987 /* Cannot identify server OS. Continue anyway and cross fingers. */
2990 state(conn, FTP_STOP); /* we are done with the CONNECT phase! */
2991 DEBUGF(infof(data, "protocol connect phase DONE\n"));
2995 if(ftpcode == 250) {
2996 /* Name format change successful: reload initial path. */
2997 ftp_state_pwd(conn);
3001 state(conn, FTP_STOP); /* we are done with the CONNECT phase! */
3002 DEBUGF(infof(data, "protocol connect phase DONE\n"));
3007 case FTP_RETR_PREQUOTE:
3008 case FTP_STOR_PREQUOTE:
3009 if((ftpcode >= 400) && !ftpc->count2) {
3010 /* failure response code, and not allowed to fail */
3011 failf(conn->data, "QUOT command failed with %03d", ftpcode);
3012 return CURLE_QUOTE_ERROR;
3014 result = ftp_state_quote(conn, FALSE, ftpc->state);
3021 if(ftpcode/100 != 2) {
3022 /* failure to CWD there */
3023 if(conn->data->set.ftp_create_missing_dirs &&
3024 ftpc->count1 && !ftpc->count2) {
3026 ftpc->count2++; /* counter to prevent CWD-MKD loops */
3027 PPSENDF(&ftpc->pp, "MKD %s", ftpc->dirs[ftpc->count1 - 1]);
3028 state(conn, FTP_MKD);
3031 /* return failure */
3032 failf(data, "Server denied you to change to the given directory");
3033 ftpc->cwdfail = TRUE; /* don't remember this path as we failed
3035 return CURLE_REMOTE_ACCESS_DENIED;
3041 if(++ftpc->count1 <= ftpc->dirdepth) {
3043 PPSENDF(&ftpc->pp, "CWD %s", ftpc->dirs[ftpc->count1 - 1]);
3046 result = ftp_state_post_cwd(conn);
3054 if((ftpcode/100 != 2) && !ftpc->count3--) {
3055 /* failure to MKD the dir */
3056 failf(data, "Failed to MKD dir: %03d", ftpcode);
3057 return CURLE_REMOTE_ACCESS_DENIED;
3059 state(conn, FTP_CWD);
3061 PPSENDF(&ftpc->pp, "CWD %s", ftpc->dirs[ftpc->count1 - 1]);
3065 result = ftp_state_mdtm_resp(conn, ftpcode);
3072 result = ftp_state_type_resp(conn, ftpcode, ftpc->state);
3078 result = ftp_state_size_resp(conn, ftpcode, ftpc->state);
3083 result = ftp_state_rest_resp(conn, ftpcode, ftpc->state);
3087 if(ftpcode != 200) {
3088 /* there only is this one standard OK return code. */
3089 failf(data, "PRET command not accepted: %03d", ftpcode);
3090 return CURLE_FTP_PRET_FAILED;
3092 result = ftp_state_use_pasv(conn);
3096 result = ftp_state_pasv_resp(conn, ftpcode);
3100 result = ftp_state_port_resp(conn, ftpcode);
3105 result = ftp_state_get_resp(conn, ftpcode, ftpc->state);
3109 result = ftp_state_stor_resp(conn, ftpcode, ftpc->state);
3113 /* fallthrough, just stop! */
3115 /* internal error */
3116 state(conn, FTP_STOP);
3125 /* called repeatedly until done from multi.c */
3126 static CURLcode ftp_multi_statemach(struct connectdata *conn,
3129 struct ftp_conn *ftpc = &conn->proto.ftpc;
3130 CURLcode result = Curl_pp_statemach(&ftpc->pp, FALSE);
3132 /* Check for the state outside of the Curl_socket_ready() return code checks
3133 since at times we are in fact already in this state when this function
3135 *done = (ftpc->state == FTP_STOP) ? TRUE : FALSE;
3140 static CURLcode ftp_block_statemach(struct connectdata *conn)
3142 struct ftp_conn *ftpc = &conn->proto.ftpc;
3143 struct pingpong *pp = &ftpc->pp;
3144 CURLcode result = CURLE_OK;
3146 while(ftpc->state != FTP_STOP) {
3147 result = Curl_pp_statemach(pp, TRUE);
3156 * Allocate and initialize the struct FTP for the current SessionHandle. If
3160 #if defined(__INTEL_COMPILER) && (__INTEL_COMPILER == 910) && \
3161 defined(__OPTIMIZE__) && defined(__unix__) && defined(__i386__)
3162 /* workaround icc 9.1 optimizer issue */
3163 #pragma optimize("", off)
3166 static CURLcode ftp_init(struct connectdata *conn)
3170 if(NULL == conn->data->state.proto.ftp) {
3171 conn->data->state.proto.ftp = malloc(sizeof(struct FTP));
3172 if(NULL == conn->data->state.proto.ftp)
3173 return CURLE_OUT_OF_MEMORY;
3176 ftp = conn->data->state.proto.ftp;
3178 /* get some initial data into the ftp struct */
3179 ftp->bytecountp = &conn->data->req.bytecount;
3180 ftp->transfer = FTPTRANSFER_BODY;
3181 ftp->downloadsize = 0;
3183 /* No need to duplicate user+password, the connectdata struct won't change
3184 during a session, but we re-init them here since on subsequent inits
3185 since the conn struct may have changed or been replaced.
3187 ftp->user = conn->user;
3188 ftp->passwd = conn->passwd;
3189 if(isBadFtpString(ftp->user))
3190 return CURLE_URL_MALFORMAT;
3191 if(isBadFtpString(ftp->passwd))
3192 return CURLE_URL_MALFORMAT;
3194 conn->proto.ftpc.known_filesize = -1; /* unknown size for now */
3199 #if defined(__INTEL_COMPILER) && (__INTEL_COMPILER == 910) && \
3200 defined(__OPTIMIZE__) && defined(__unix__) && defined(__i386__)
3201 /* workaround icc 9.1 optimizer issue */
3202 #pragma optimize("", on)
3206 * ftp_connect() should do everything that is to be considered a part of
3207 * the connection phase.
3209 * The variable 'done' points to will be TRUE if the protocol-layer connect
3210 * phase is done when this function returns, or FALSE is not. When called as
3211 * a part of the easy interface, it will always be TRUE.
3213 static CURLcode ftp_connect(struct connectdata *conn,
3214 bool *done) /* see description above */
3217 struct ftp_conn *ftpc = &conn->proto.ftpc;
3218 struct pingpong *pp = &ftpc->pp;
3220 *done = FALSE; /* default to not done yet */
3222 /* If there already is a protocol-specific struct allocated for this
3223 sessionhandle, deal with it */
3224 Curl_reset_reqproto(conn);
3226 result = ftp_init(conn);
3227 if(CURLE_OK != result)
3230 /* We always support persistent connections on ftp */
3231 conn->bits.close = FALSE;
3233 pp->response_time = RESP_TIMEOUT; /* set default response time-out */
3234 pp->statemach_act = ftp_statemach_act;
3235 pp->endofresp = ftp_endofresp;
3238 if(conn->handler->flags & PROTOPT_SSL) {
3240 result = Curl_ssl_connect(conn, FIRSTSOCKET);
3245 Curl_pp_init(pp); /* init the generic pingpong data */
3247 /* When we connect, we start in the state where we await the 220
3249 state(conn, FTP_WAIT220);
3251 result = ftp_multi_statemach(conn, done);
3256 /***********************************************************************
3260 * The DONE function. This does what needs to be done after a single DO has
3263 * Input argument is already checked for validity.
3265 static CURLcode ftp_done(struct connectdata *conn, CURLcode status,
3268 struct SessionHandle *data = conn->data;
3269 struct FTP *ftp = data->state.proto.ftp;
3270 struct ftp_conn *ftpc = &conn->proto.ftpc;
3271 struct pingpong *pp = &ftpc->pp;
3274 CURLcode result = CURLE_OK;
3275 bool was_ctl_valid = ftpc->ctl_valid;
3277 const char *path_to_use = data->state.path;
3280 /* When the easy handle is removed from the multi while libcurl is still
3281 * trying to resolve the host name, it seems that the ftp struct is not
3282 * yet initialized, but the removal action calls Curl_done() which calls
3283 * this function. So we simply return success if no ftp pointer is set.
3288 case CURLE_BAD_DOWNLOAD_RESUME:
3289 case CURLE_FTP_WEIRD_PASV_REPLY:
3290 case CURLE_FTP_PORT_FAILED:
3291 case CURLE_FTP_ACCEPT_FAILED:
3292 case CURLE_FTP_ACCEPT_TIMEOUT:
3293 case CURLE_FTP_COULDNT_SET_TYPE:
3294 case CURLE_FTP_COULDNT_RETR_FILE:
3295 case CURLE_PARTIAL_FILE:
3296 case CURLE_UPLOAD_FAILED:
3297 case CURLE_REMOTE_ACCESS_DENIED:
3298 case CURLE_FILESIZE_EXCEEDED:
3299 case CURLE_REMOTE_FILE_NOT_FOUND:
3300 case CURLE_WRITE_ERROR:
3301 /* the connection stays alive fine even though this happened */
3303 case CURLE_OK: /* doesn't affect the control connection's status */
3305 ftpc->ctl_valid = was_ctl_valid;
3308 /* until we cope better with prematurely ended requests, let them
3309 * fallback as if in complete failure */
3310 default: /* by default, an error means the control connection is
3311 wedged and should not be used anymore */
3312 ftpc->ctl_valid = FALSE;
3313 ftpc->cwdfail = TRUE; /* set this TRUE to prevent us to remember the
3314 current path, as this connection is going */
3315 conn->bits.close = TRUE; /* marked for closure */
3316 result = status; /* use the already set error code */
3320 /* now store a copy of the directory we are in */
3322 free(ftpc->prevpath);
3324 if(data->set.wildcardmatch) {
3325 if(data->set.chunk_end && ftpc->file) {
3326 data->set.chunk_end(data->wildcard.customptr);
3328 ftpc->known_filesize = -1;
3331 /* get the "raw" path */
3332 path = curl_easy_unescape(data, path_to_use, 0, NULL);
3334 /* out of memory, but we can limp along anyway (and should try to
3335 * since we may already be in the out of memory cleanup path) */
3337 result = CURLE_OUT_OF_MEMORY;
3338 ftpc->ctl_valid = FALSE; /* mark control connection as bad */
3339 conn->bits.close = TRUE; /* mark for connection closure */
3340 ftpc->prevpath = NULL; /* no path remembering */
3343 size_t flen = ftpc->file?strlen(ftpc->file):0; /* file is "raw" already */
3344 size_t dlen = strlen(path)-flen;
3345 if(!ftpc->cwdfail) {
3346 if(dlen && (data->set.ftp_filemethod != FTPFILE_NOCWD)) {
3347 ftpc->prevpath = path;
3349 /* if 'path' is not the whole string */
3350 ftpc->prevpath[dlen]=0; /* terminate */
3353 /* we never changed dir */
3354 ftpc->prevpath=strdup("");
3358 infof(data, "Remembering we are in dir \"%s\"\n", ftpc->prevpath);
3361 ftpc->prevpath = NULL; /* no path */
3365 /* free the dir tree and file parts */
3368 /* shut down the socket to inform the server we're done */
3371 shutdown(conn->sock[SECONDARYSOCKET],2); /* SD_BOTH */
3374 if(conn->sock[SECONDARYSOCKET] != CURL_SOCKET_BAD) {
3375 if(!result && ftpc->dont_check && data->req.maxdownload > 0)
3376 /* partial download completed */
3377 result = Curl_pp_sendf(pp, "ABOR");
3379 failf(data, "Failure sending ABOR command: %s",
3380 curl_easy_strerror(result));
3381 ftpc->ctl_valid = FALSE; /* mark control connection as bad */
3382 conn->bits.close = TRUE; /* mark for connection closure */
3385 if(conn->ssl[SECONDARYSOCKET].use) {
3386 /* The secondary socket is using SSL so we must close down that part
3387 first before we close the socket for real */
3388 Curl_ssl_close(conn, SECONDARYSOCKET);
3390 /* Note that we keep "use" set to TRUE since that (next) connection is
3391 still requested to use SSL */
3393 if(CURL_SOCKET_BAD != conn->sock[SECONDARYSOCKET]) {
3394 Curl_closesocket(conn, conn->sock[SECONDARYSOCKET]);
3395 conn->sock[SECONDARYSOCKET] = CURL_SOCKET_BAD;
3396 conn->bits.tcpconnect[SECONDARYSOCKET] = FALSE;
3400 if(!result && (ftp->transfer == FTPTRANSFER_BODY) && ftpc->ctl_valid &&
3401 pp->pending_resp && !premature) {
3403 * Let's see what the server says about the transfer we just performed,
3404 * but lower the timeout as sometimes this connection has died while the
3405 * data has been transferred. This happens when doing through NATs etc that
3406 * abandon old silent connections.
3408 long old_time = pp->response_time;
3410 pp->response_time = 60*1000; /* give it only a minute for now */
3411 pp->response = Curl_tvnow(); /* timeout relative now */
3413 result = Curl_GetFTPResponse(&nread, conn, &ftpcode);
3415 pp->response_time = old_time; /* set this back to previous value */
3417 if(!nread && (CURLE_OPERATION_TIMEDOUT == result)) {
3418 failf(data, "control connection looks dead");
3419 ftpc->ctl_valid = FALSE; /* mark control connection as bad */
3420 conn->bits.close = TRUE; /* mark for closure */
3426 if(ftpc->dont_check && data->req.maxdownload > 0) {
3427 /* we have just sent ABOR and there is no reliable way to check if it was
3428 * successful or not; we have to close the connection now */
3429 infof(data, "partial download completed, closing connection\n");
3430 conn->bits.close = TRUE; /* mark for closure */
3434 if(!ftpc->dont_check) {
3435 /* 226 Transfer complete, 250 Requested file action okay, completed. */
3436 if((ftpcode != 226) && (ftpcode != 250)) {
3437 failf(data, "server did not report OK, got %d", ftpcode);
3438 result = CURLE_PARTIAL_FILE;
3443 if(result || premature)
3444 /* the response code from the transfer showed an error already so no
3445 use checking further */
3447 else if(data->set.upload) {
3448 if((-1 != data->set.infilesize) &&
3449 (data->set.infilesize != *ftp->bytecountp) &&
3451 (ftp->transfer == FTPTRANSFER_BODY)) {
3452 failf(data, "Uploaded unaligned file size (%" FORMAT_OFF_T
3453 " out of %" FORMAT_OFF_T " bytes)",
3454 *ftp->bytecountp, data->set.infilesize);
3455 result = CURLE_PARTIAL_FILE;
3459 if((-1 != data->req.size) &&
3460 (data->req.size != *ftp->bytecountp) &&
3461 #ifdef CURL_DO_LINEEND_CONV
3462 /* Most FTP servers don't adjust their file SIZE response for CRLFs, so
3463 * we'll check to see if the discrepancy can be explained by the number
3464 * of CRLFs we've changed to LFs.
3466 ((data->req.size + data->state.crlf_conversions) !=
3467 *ftp->bytecountp) &&
3468 #endif /* CURL_DO_LINEEND_CONV */
3469 (data->req.maxdownload != *ftp->bytecountp)) {
3470 failf(data, "Received only partial file: %" FORMAT_OFF_T " bytes",
3472 result = CURLE_PARTIAL_FILE;
3474 else if(!ftpc->dont_check &&
3475 !*ftp->bytecountp &&
3476 (data->req.size>0)) {
3477 failf(data, "No data was received!");
3478 result = CURLE_FTP_COULDNT_RETR_FILE;
3482 /* clear these for next connection */
3483 ftp->transfer = FTPTRANSFER_BODY;
3484 ftpc->dont_check = FALSE;
3486 /* Send any post-transfer QUOTE strings? */
3487 if(!status && !result && !premature && data->set.postquote)
3488 result = ftp_sendquote(conn, data->set.postquote);
3493 /***********************************************************************
3497 * Where a 'quote' means a list of custom commands to send to the server.
3498 * The quote list is passed as an argument.
3504 CURLcode ftp_sendquote(struct connectdata *conn, struct curl_slist *quote)
3506 struct curl_slist *item;
3510 struct ftp_conn *ftpc = &conn->proto.ftpc;
3511 struct pingpong *pp = &ftpc->pp;
3516 char *cmd = item->data;
3517 bool acceptfail = FALSE;
3519 /* if a command starts with an asterisk, which a legal FTP command never
3520 can, the command will be allowed to fail without it causing any
3521 aborts or cancels etc. It will cause libcurl to act as if the command
3522 is successful, whatever the server reponds. */
3529 PPSENDF(&conn->proto.ftpc.pp, "%s", cmd);
3531 pp->response = Curl_tvnow(); /* timeout relative now */
3533 result = Curl_GetFTPResponse(&nread, conn, &ftpcode);
3537 if(!acceptfail && (ftpcode >= 400)) {
3538 failf(conn->data, "QUOT string not accepted: %s", cmd);
3539 return CURLE_QUOTE_ERROR;
3549 /***********************************************************************
3553 * Returns TRUE if we in the current situation should send TYPE
3555 static int ftp_need_type(struct connectdata *conn,
3558 return conn->proto.ftpc.transfertype != (ascii_wanted?'A':'I');
3561 /***********************************************************************
3565 * Set TYPE. We only deal with ASCII or BINARY so this function
3567 * If the transfer type is not sent, simulate on OK response in newstate
3569 static CURLcode ftp_nb_type(struct connectdata *conn,
3570 bool ascii, ftpstate newstate)
3572 struct ftp_conn *ftpc = &conn->proto.ftpc;
3574 char want = (char)(ascii?'A':'I');
3576 if(ftpc->transfertype == want) {
3577 state(conn, newstate);
3578 return ftp_state_type_resp(conn, 200, newstate);
3581 PPSENDF(&ftpc->pp, "TYPE %c", want);
3582 state(conn, newstate);
3584 /* keep track of our current transfer type */
3585 ftpc->transfertype = want;
3589 /***************************************************************************
3591 * ftp_pasv_verbose()
3593 * This function only outputs some informationals about this second connection
3594 * when we've issued a PASV command before and thus we have connected to a
3595 * possibly new IP address.
3598 #ifndef CURL_DISABLE_VERBOSE_STRINGS
3600 ftp_pasv_verbose(struct connectdata *conn,
3602 char *newhost, /* ascii version */
3606 Curl_printable_address(ai, buf, sizeof(buf));
3607 infof(conn->data, "Connecting to %s (%s) port %d\n", newhost, buf, port);
3612 Check if this is a range download, and if so, set the internal variables
3616 static CURLcode ftp_range(struct connectdata *conn)
3618 curl_off_t from, to;
3621 struct SessionHandle *data = conn->data;
3622 struct ftp_conn *ftpc = &conn->proto.ftpc;
3624 if(data->state.use_range && data->state.range) {
3625 from=curlx_strtoofft(data->state.range, &ptr, 0);
3626 while(*ptr && (ISSPACE(*ptr) || (*ptr=='-')))
3628 to=curlx_strtoofft(ptr, &ptr2, 0);
3630 /* we didn't get any digit */
3633 if((-1 == to) && (from>=0)) {
3635 data->state.resume_from = from;
3636 DEBUGF(infof(conn->data, "FTP RANGE %" FORMAT_OFF_T " to end of file\n",
3641 data->req.maxdownload = -from;
3642 data->state.resume_from = from;
3643 DEBUGF(infof(conn->data, "FTP RANGE the last %" FORMAT_OFF_T " bytes\n",
3648 data->req.maxdownload = (to-from)+1; /* include last byte */
3649 data->state.resume_from = from;
3650 DEBUGF(infof(conn->data, "FTP RANGE from %" FORMAT_OFF_T
3651 " getting %" FORMAT_OFF_T " bytes\n",
3652 from, data->req.maxdownload));
3654 DEBUGF(infof(conn->data, "range-download from %" FORMAT_OFF_T
3655 " to %" FORMAT_OFF_T ", totally %" FORMAT_OFF_T " bytes\n",
3656 from, to, data->req.maxdownload));
3657 ftpc->dont_check = TRUE; /* dont check for successful transfer */
3660 data->req.maxdownload = -1;
3668 * This function shall be called when the second FTP (data) connection is
3672 static CURLcode ftp_do_more(struct connectdata *conn, bool *complete)
3674 struct SessionHandle *data=conn->data;
3675 struct ftp_conn *ftpc = &conn->proto.ftpc;
3676 CURLcode result = CURLE_OK;
3677 bool connected = FALSE;
3679 /* the ftp struct is inited in ftp_connect() */
3680 struct FTP *ftp = data->state.proto.ftp;
3684 /* if the second connection isn't done yet, wait for it */
3685 if(!conn->bits.tcpconnect[SECONDARYSOCKET]) {
3686 if(conn->tunnel_state[SECONDARYSOCKET] == TUNNEL_CONNECT) {
3687 /* As we're in TUNNEL_CONNECT state now, we know the proxy name and port
3688 aren't used so we blank their arguments. TODO: make this nicer */
3689 result = Curl_proxyCONNECT(conn, SECONDARYSOCKET, NULL, 0);
3694 result = Curl_is_connected(conn, SECONDARYSOCKET, &connected);
3696 /* Ready to do more? */
3698 DEBUGF(infof(data, "DO-MORE connected phase starts\n"));
3705 /* already in a state so skip the intial commands.
3706 They are only done to kickstart the do_more state */
3707 result = ftp_multi_statemach(conn, complete);
3709 /* if we got an error or if we don't wait for a data connection return
3711 if(result || (ftpc->wait_data_conn != TRUE))
3714 if(ftpc->wait_data_conn)
3715 /* if we reach the end of the FTP state machine here, *complete will be
3716 TRUE but so is ftpc->wait_data_conn, which says we need to wait for
3717 the data connection and therefore we're not actually complete */
3721 if(ftp->transfer <= FTPTRANSFER_INFO) {
3722 /* a transfer is about to take place, or if not a file name was given
3723 so we'll do a SIZE on it later and then we need the right TYPE first */
3725 if(ftpc->wait_data_conn == TRUE) {
3728 result = ReceivedServerConnect(conn, &serv_conned);
3730 return result; /* Failed to accept data connection */
3733 /* It looks data connection is established */
3734 result = AcceptServerConnect(conn);
3735 ftpc->wait_data_conn = FALSE;
3737 result = InitiateTransfer(conn);
3743 else if(data->set.upload) {
3744 result = ftp_nb_type(conn, data->set.prefer_ascii, FTP_STOR_TYPE);
3748 result = ftp_multi_statemach(conn, complete);
3752 ftp->downloadsize = -1; /* unknown as of yet */
3754 result = ftp_range(conn);
3757 else if(data->set.ftp_list_only || !ftpc->file) {
3758 /* The specified path ends with a slash, and therefore we think this
3759 is a directory that is requested, use LIST. But before that we
3760 need to set ASCII transfer mode. */
3762 /* But only if a body transfer was requested. */
3763 if(ftp->transfer == FTPTRANSFER_BODY) {
3764 result = ftp_nb_type(conn, TRUE, FTP_LIST_TYPE);
3768 /* otherwise just fall through */
3771 result = ftp_nb_type(conn, data->set.prefer_ascii, FTP_RETR_TYPE);
3776 result = ftp_multi_statemach(conn, complete);
3781 if((result == CURLE_OK) && (ftp->transfer != FTPTRANSFER_BODY))
3782 /* no data to transfer. FIX: it feels like a kludge to have this here
3784 Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
3786 if(!ftpc->wait_data_conn) {
3787 /* no waiting for the data connection so this is now complete */
3789 DEBUGF(infof(data, "DO-MORE phase ends with %d\n", (int)result));
3797 /***********************************************************************
3801 * This is the actual DO function for FTP. Get a file/directory according to
3802 * the options previously setup.
3806 CURLcode ftp_perform(struct connectdata *conn,
3807 bool *connected, /* connect status after PASV / PORT */
3810 /* this is FTP and no proxy */
3811 CURLcode result=CURLE_OK;
3813 DEBUGF(infof(conn->data, "DO phase starts\n"));
3815 if(conn->data->set.opt_no_body) {
3816 /* requested no body means no transfer... */
3817 struct FTP *ftp = conn->data->state.proto.ftp;
3818 ftp->transfer = FTPTRANSFER_INFO;
3821 *dophase_done = FALSE; /* not done yet */
3823 /* start the first command in the DO phase */
3824 result = ftp_state_quote(conn, TRUE, FTP_QUOTE);
3828 /* run the state-machine */
3829 result = ftp_multi_statemach(conn, dophase_done);
3831 *connected = conn->bits.tcpconnect[FIRSTSOCKET];
3834 DEBUGF(infof(conn->data, "DO phase is complete1\n"));
3839 static void wc_data_dtor(void *ptr)
3841 struct ftp_wc_tmpdata *tmp = ptr;
3843 Curl_ftp_parselist_data_free(&tmp->parser);
3847 static CURLcode init_wc_data(struct connectdata *conn)
3850 char *path = conn->data->state.path;
3851 struct WildcardData *wildcard = &(conn->data->wildcard);
3852 CURLcode ret = CURLE_OK;
3853 struct ftp_wc_tmpdata *ftp_tmp;
3855 last_slash = strrchr(conn->data->state.path, '/');
3858 if(last_slash[0] == '\0') {
3859 wildcard->state = CURLWC_CLEAN;
3860 ret = ftp_parse_url_path(conn);
3864 wildcard->pattern = strdup(last_slash);
3865 if(!wildcard->pattern)
3866 return CURLE_OUT_OF_MEMORY;
3867 last_slash[0] = '\0'; /* cut file from path */
3870 else { /* there is only 'wildcard pattern' or nothing */
3872 wildcard->pattern = strdup(path);
3873 if(!wildcard->pattern)
3874 return CURLE_OUT_OF_MEMORY;
3877 else { /* only list */
3878 wildcard->state = CURLWC_CLEAN;
3879 ret = ftp_parse_url_path(conn);
3884 /* program continues only if URL is not ending with slash, allocate needed
3885 resources for wildcard transfer */
3887 /* allocate ftp protocol specific temporary wildcard data */
3888 ftp_tmp = calloc(1, sizeof(struct ftp_wc_tmpdata));
3890 Curl_safefree(wildcard->pattern);
3891 return CURLE_OUT_OF_MEMORY;
3894 /* INITIALIZE parselist structure */
3895 ftp_tmp->parser = Curl_ftp_parselist_data_alloc();
3896 if(!ftp_tmp->parser) {
3897 Curl_safefree(wildcard->pattern);
3898 Curl_safefree(ftp_tmp);
3899 return CURLE_OUT_OF_MEMORY;
3902 wildcard->tmp = ftp_tmp; /* put it to the WildcardData tmp pointer */
3903 wildcard->tmp_dtor = wc_data_dtor;
3905 /* wildcard does not support NOCWD option (assert it?) */
3906 if(conn->data->set.ftp_filemethod == FTPFILE_NOCWD)
3907 conn->data->set.ftp_filemethod = FTPFILE_MULTICWD;
3909 /* try to parse ftp url */
3910 ret = ftp_parse_url_path(conn);
3912 Curl_safefree(wildcard->pattern);
3913 wildcard->tmp_dtor(wildcard->tmp);
3914 wildcard->tmp_dtor = ZERO_NULL;
3915 wildcard->tmp = NULL;
3919 wildcard->path = strdup(conn->data->state.path);
3920 if(!wildcard->path) {
3921 Curl_safefree(wildcard->pattern);
3922 wildcard->tmp_dtor(wildcard->tmp);
3923 wildcard->tmp_dtor = ZERO_NULL;
3924 wildcard->tmp = NULL;
3925 return CURLE_OUT_OF_MEMORY;
3928 /* backup old write_function */
3929 ftp_tmp->backup.write_function = conn->data->set.fwrite_func;
3930 /* parsing write function */
3931 conn->data->set.fwrite_func = Curl_ftp_parselist;
3932 /* backup old file descriptor */
3933 ftp_tmp->backup.file_descriptor = conn->data->set.out;
3934 /* let the writefunc callback know what curl pointer is working with */
3935 conn->data->set.out = conn;
3937 infof(conn->data, "Wildcard - Parsing started\n");
3941 /* This is called recursively */
3942 static CURLcode wc_statemach(struct connectdata *conn)
3944 struct WildcardData * const wildcard = &(conn->data->wildcard);
3945 CURLcode ret = CURLE_OK;
3947 switch (wildcard->state) {
3949 ret = init_wc_data(conn);
3950 if(wildcard->state == CURLWC_CLEAN)
3954 wildcard->state = ret ? CURLWC_ERROR : CURLWC_MATCHING;
3957 case CURLWC_MATCHING: {
3958 /* In this state is LIST response successfully parsed, so lets restore
3959 previous WRITEFUNCTION callback and WRITEDATA pointer */
3960 struct ftp_wc_tmpdata *ftp_tmp = wildcard->tmp;
3961 conn->data->set.fwrite_func = ftp_tmp->backup.write_function;
3962 conn->data->set.out = ftp_tmp->backup.file_descriptor;
3963 ftp_tmp->backup.write_function = ZERO_NULL;
3964 ftp_tmp->backup.file_descriptor = NULL;
3965 wildcard->state = CURLWC_DOWNLOADING;
3967 if(Curl_ftp_parselist_geterror(ftp_tmp->parser)) {
3968 /* error found in LIST parsing */
3969 wildcard->state = CURLWC_CLEAN;
3970 return wc_statemach(conn);
3972 else if(wildcard->filelist->size == 0) {
3973 /* no corresponding file */
3974 wildcard->state = CURLWC_CLEAN;
3975 return CURLE_REMOTE_FILE_NOT_FOUND;
3977 return wc_statemach(conn);
3980 case CURLWC_DOWNLOADING: {
3981 /* filelist has at least one file, lets get first one */
3982 struct ftp_conn *ftpc = &conn->proto.ftpc;
3983 struct curl_fileinfo *finfo = wildcard->filelist->head->ptr;
3985 char *tmp_path = aprintf("%s%s", wildcard->path, finfo->filename);
3987 return CURLE_OUT_OF_MEMORY;
3989 /* switch default "state.pathbuffer" and tmp_path, good to see
3990 ftp_parse_url_path function to understand this trick */
3991 Curl_safefree(conn->data->state.pathbuffer);
3992 conn->data->state.pathbuffer = tmp_path;
3993 conn->data->state.path = tmp_path;
3995 infof(conn->data, "Wildcard - START of \"%s\"\n", finfo->filename);
3996 if(conn->data->set.chunk_bgn) {
3997 long userresponse = conn->data->set.chunk_bgn(
3998 finfo, wildcard->customptr, (int)wildcard->filelist->size);
3999 switch(userresponse) {
4000 case CURL_CHUNK_BGN_FUNC_SKIP:
4001 infof(conn->data, "Wildcard - \"%s\" skipped by user\n",
4003 wildcard->state = CURLWC_SKIP;
4004 return wc_statemach(conn);
4005 case CURL_CHUNK_BGN_FUNC_FAIL:
4006 return CURLE_CHUNK_FAILED;
4010 if(finfo->filetype != CURLFILETYPE_FILE) {
4011 wildcard->state = CURLWC_SKIP;
4012 return wc_statemach(conn);
4015 if(finfo->flags & CURLFINFOFLAG_KNOWN_SIZE)
4016 ftpc->known_filesize = finfo->size;
4018 ret = ftp_parse_url_path(conn);
4023 /* we don't need the Curl_fileinfo of first file anymore */
4024 Curl_llist_remove(wildcard->filelist, wildcard->filelist->head, NULL);
4026 if(wildcard->filelist->size == 0) { /* remains only one file to down. */
4027 wildcard->state = CURLWC_CLEAN;
4028 /* after that will be ftp_do called once again and no transfer
4029 will be done because of CURLWC_CLEAN state */
4035 if(conn->data->set.chunk_end)
4036 conn->data->set.chunk_end(conn->data->wildcard.customptr);
4037 Curl_llist_remove(wildcard->filelist, wildcard->filelist->head, NULL);
4038 wildcard->state = (wildcard->filelist->size == 0) ?
4039 CURLWC_CLEAN : CURLWC_DOWNLOADING;
4040 return wc_statemach(conn);
4043 case CURLWC_CLEAN: {
4044 struct ftp_wc_tmpdata *ftp_tmp = wildcard->tmp;
4047 ret = Curl_ftp_parselist_geterror(ftp_tmp->parser);
4049 wildcard->state = ret ? CURLWC_ERROR : CURLWC_DONE;
4060 /***********************************************************************
4064 * This function is registered as 'curl_do' function. It decodes the path
4065 * parts etc as a wrapper to the actual DO function (ftp_perform).
4067 * The input argument is already checked for validity.
4069 static CURLcode ftp_do(struct connectdata *conn, bool *done)
4071 CURLcode retcode = CURLE_OK;
4072 struct ftp_conn *ftpc = &conn->proto.ftpc;
4074 *done = FALSE; /* default to false */
4075 ftpc->wait_data_conn = FALSE; /* default to no such wait */
4078 Since connections can be re-used between SessionHandles, this might be a
4079 connection already existing but on a fresh SessionHandle struct so we must
4080 make sure we have a good 'struct FTP' to play with. For new connections,
4081 the struct FTP is allocated and setup in the ftp_connect() function.
4083 Curl_reset_reqproto(conn);
4084 retcode = ftp_init(conn);
4088 if(conn->data->set.wildcardmatch) {
4089 retcode = wc_statemach(conn);
4090 if(conn->data->wildcard.state == CURLWC_SKIP ||
4091 conn->data->wildcard.state == CURLWC_DONE) {
4092 /* do not call ftp_regular_transfer */
4095 if(retcode) /* error, loop or skipping the file */
4098 else { /* no wildcard FSM needed */
4099 retcode = ftp_parse_url_path(conn);
4104 retcode = ftp_regular_transfer(conn, done);
4110 CURLcode Curl_ftpsendf(struct connectdata *conn,
4111 const char *fmt, ...)
4113 ssize_t bytes_written;
4114 #define SBUF_SIZE 1024
4118 CURLcode res = CURLE_OK;
4119 #if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
4120 enum protection_level data_sec = conn->data_prot;
4125 write_len = vsnprintf(s, SBUF_SIZE-3, fmt, ap);
4128 strcpy(&s[write_len], "\r\n"); /* append a trailing CRLF */
4133 res = Curl_convert_to_network(conn->data, s, write_len);
4134 /* Curl_convert_to_network calls failf if unsuccessful */
4139 #if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
4140 conn->data_prot = PROT_CMD;
4142 res = Curl_write(conn, conn->sock[FIRSTSOCKET], sptr, write_len,
4144 #if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
4145 DEBUGASSERT(data_sec > PROT_NONE && data_sec < PROT_LAST);
4146 conn->data_prot = data_sec;
4152 if(conn->data->set.verbose)
4153 Curl_debug(conn->data, CURLINFO_HEADER_OUT,
4154 sptr, (size_t)bytes_written, conn);
4156 if(bytes_written != (ssize_t)write_len) {
4157 write_len -= bytes_written;
4158 sptr += bytes_written;
4167 /***********************************************************************
4171 * This should be called before calling sclose() on an ftp control connection
4172 * (not data connections). We should then wait for the response from the
4173 * server before returning. The calling code should then try to close the
4177 static CURLcode ftp_quit(struct connectdata *conn)
4179 CURLcode result = CURLE_OK;
4181 if(conn->proto.ftpc.ctl_valid) {
4182 result = Curl_pp_sendf(&conn->proto.ftpc.pp, "QUIT", NULL);
4184 failf(conn->data, "Failure sending QUIT command: %s",
4185 curl_easy_strerror(result));
4186 conn->proto.ftpc.ctl_valid = FALSE; /* mark control connection as bad */
4187 conn->bits.close = TRUE; /* mark for connection closure */
4188 state(conn, FTP_STOP);
4192 state(conn, FTP_QUIT);
4194 result = ftp_block_statemach(conn);
4200 /***********************************************************************
4204 * Disconnect from an FTP server. Cleanup protocol-specific per-connection
4205 * resources. BLOCKING.
4207 static CURLcode ftp_disconnect(struct connectdata *conn, bool dead_connection)
4209 struct ftp_conn *ftpc= &conn->proto.ftpc;
4210 struct pingpong *pp = &ftpc->pp;
4212 /* We cannot send quit unconditionally. If this connection is stale or
4213 bad in any way, sending quit and waiting around here will make the
4214 disconnect wait in vain and cause more problems than we need to.
4216 ftp_quit() will check the state of ftp->ctl_valid. If it's ok it
4217 will try to send the QUIT command, otherwise it will just return.
4220 ftpc->ctl_valid = FALSE;
4222 /* The FTP session may or may not have been allocated/setup at this point! */
4223 (void)ftp_quit(conn); /* ignore errors on the QUIT */
4225 if(ftpc->entrypath) {
4226 struct SessionHandle *data = conn->data;
4227 if(data->state.most_recent_ftp_entrypath == ftpc->entrypath) {
4228 data->state.most_recent_ftp_entrypath = NULL;
4230 free(ftpc->entrypath);
4231 ftpc->entrypath = NULL;
4235 if(ftpc->prevpath) {
4236 free(ftpc->prevpath);
4237 ftpc->prevpath = NULL;
4239 if(ftpc->server_os) {
4240 free(ftpc->server_os);
4241 ftpc->server_os = NULL;
4244 Curl_pp_disconnect(pp);
4246 #if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
4253 /***********************************************************************
4255 * ftp_parse_url_path()
4257 * Parse the URL path into separate path components.
4261 CURLcode ftp_parse_url_path(struct connectdata *conn)
4263 struct SessionHandle *data = conn->data;
4264 /* the ftp struct is already inited in ftp_connect() */
4265 struct FTP *ftp = data->state.proto.ftp;
4266 struct ftp_conn *ftpc = &conn->proto.ftpc;
4267 const char *slash_pos; /* position of the first '/' char in curpos */
4268 const char *path_to_use = data->state.path;
4269 const char *cur_pos;
4270 const char *filename = NULL;
4272 cur_pos = path_to_use; /* current position in path. point at the begin
4273 of next path component */
4275 ftpc->ctl_valid = FALSE;
4276 ftpc->cwdfail = FALSE;
4278 switch(data->set.ftp_filemethod) {
4280 /* fastest, but less standard-compliant */
4283 The best time to check whether the path is a file or directory is right
4286 the first condition in the if() right here, is there just in case
4287 someone decides to set path to NULL one day
4289 if(data->state.path &&
4290 data->state.path[0] &&
4291 (data->state.path[strlen(data->state.path) - 1] != '/') )
4292 filename = data->state.path; /* this is a full file path */
4294 ftpc->file is not used anywhere other than for operations on a file.
4295 In other words, never for directory operations.
4296 So we can safely leave filename as NULL here and use it as a
4297 argument in dir/file decisions.
4301 case FTPFILE_SINGLECWD:
4302 /* get the last slash */
4303 if(!path_to_use[0]) {
4304 /* no dir, no file */
4308 slash_pos=strrchr(cur_pos, '/');
4309 if(slash_pos || !*cur_pos) {
4310 ftpc->dirs = calloc(1, sizeof(ftpc->dirs[0]));
4312 return CURLE_OUT_OF_MEMORY;
4314 ftpc->dirs[0] = curl_easy_unescape(conn->data, slash_pos ? cur_pos : "/",
4316 curlx_sztosi(slash_pos-cur_pos) : 1,
4318 if(!ftpc->dirs[0]) {
4320 return CURLE_OUT_OF_MEMORY;
4322 ftpc->dirdepth = 1; /* we consider it to be a single dir */
4323 filename = slash_pos ? slash_pos+1 : cur_pos; /* rest is file name */
4326 filename = cur_pos; /* this is a file name only */
4329 default: /* allow pretty much anything */
4330 case FTPFILE_MULTICWD:
4332 ftpc->diralloc = 5; /* default dir depth to allocate */
4333 ftpc->dirs = calloc(ftpc->diralloc, sizeof(ftpc->dirs[0]));
4335 return CURLE_OUT_OF_MEMORY;
4337 /* we have a special case for listing the root dir only */
4338 if(strequal(path_to_use, "/")) {
4339 cur_pos++; /* make it point to the zero byte */
4340 ftpc->dirs[0] = strdup("/");
4344 /* parse the URL path into separate path components */
4345 while((slash_pos = strchr(cur_pos, '/')) != NULL) {
4346 /* 1 or 0 pointer offset to indicate absolute directory */
4347 ssize_t absolute_dir = ((cur_pos - data->state.path > 0) &&
4348 (ftpc->dirdepth == 0))?1:0;
4350 /* seek out the next path component */
4351 if(slash_pos-cur_pos) {
4352 /* we skip empty path components, like "x//y" since the FTP command
4353 CWD requires a parameter and a non-existent parameter a) doesn't
4354 work on many servers and b) has no effect on the others. */
4355 int len = curlx_sztosi(slash_pos - cur_pos + absolute_dir);
4356 ftpc->dirs[ftpc->dirdepth] =
4357 curl_easy_unescape(conn->data, cur_pos - absolute_dir, len, NULL);
4358 if(!ftpc->dirs[ftpc->dirdepth]) { /* run out of memory ... */
4359 failf(data, "no memory");
4361 return CURLE_OUT_OF_MEMORY;
4363 if(isBadFtpString(ftpc->dirs[ftpc->dirdepth])) {
4364 free(ftpc->dirs[ftpc->dirdepth]);
4366 return CURLE_URL_MALFORMAT;
4370 cur_pos = slash_pos + 1; /* jump to the rest of the string */
4374 cur_pos = slash_pos + 1; /* jump to the rest of the string */
4375 if(++ftpc->dirdepth >= ftpc->diralloc) {
4378 ftpc->diralloc *= 2; /* double the size each time */
4379 bigger = realloc(ftpc->dirs, ftpc->diralloc * sizeof(ftpc->dirs[0]));
4382 return CURLE_OUT_OF_MEMORY;
4384 ftpc->dirs = bigger;
4388 filename = cur_pos; /* the rest is the file name */
4392 if(filename && *filename) {
4393 ftpc->file = curl_easy_unescape(conn->data, filename, 0, NULL);
4394 if(NULL == ftpc->file) {
4396 failf(data, "no memory");
4397 return CURLE_OUT_OF_MEMORY;
4399 if(isBadFtpString(ftpc->file)) {
4401 return CURLE_URL_MALFORMAT;
4405 ftpc->file=NULL; /* instead of point to a zero byte, we make it a NULL
4408 if(data->set.upload && !ftpc->file && (ftp->transfer == FTPTRANSFER_BODY)) {
4409 /* We need a file name when uploading. Return error! */
4410 failf(data, "Uploading to a URL without a file name!");
4411 return CURLE_URL_MALFORMAT;
4414 ftpc->cwddone = FALSE; /* default to not done */
4416 if(ftpc->prevpath) {
4417 /* prevpath is "raw" so we convert the input path before we compare the
4420 char *path = curl_easy_unescape(conn->data, data->state.path, 0, &dlen);
4423 return CURLE_OUT_OF_MEMORY;
4426 dlen -= ftpc->file?curlx_uztosi(strlen(ftpc->file)):0;
4427 if((dlen == curlx_uztosi(strlen(ftpc->prevpath))) &&
4428 strnequal(path, ftpc->prevpath, dlen)) {
4429 infof(data, "Request has same path as previous transfer\n");
4430 ftpc->cwddone = TRUE;
4438 /* call this when the DO phase has completed */
4439 static CURLcode ftp_dophase_done(struct connectdata *conn,
4442 struct FTP *ftp = conn->data->state.proto.ftp;
4443 struct ftp_conn *ftpc = &conn->proto.ftpc;
4447 CURLcode result = ftp_do_more(conn, &completed);
4450 if(conn->sock[SECONDARYSOCKET] != CURL_SOCKET_BAD) {
4451 /* close the second socket if it was created already */
4452 Curl_closesocket(conn, conn->sock[SECONDARYSOCKET]);
4453 conn->sock[SECONDARYSOCKET] = CURL_SOCKET_BAD;
4459 if(ftp->transfer != FTPTRANSFER_BODY)
4460 /* no data to transfer */
4461 Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
4463 /* since we didn't connect now, we want do_more to get called */
4464 conn->bits.do_more = TRUE;
4466 ftpc->ctl_valid = TRUE; /* seems good */
4471 /* called from multi.c while DOing */
4472 static CURLcode ftp_doing(struct connectdata *conn,
4475 CURLcode result = ftp_multi_statemach(conn, dophase_done);
4478 DEBUGF(infof(conn->data, "DO phase failed\n"));
4479 else if(*dophase_done) {
4480 result = ftp_dophase_done(conn, FALSE /* not connected */);
4482 DEBUGF(infof(conn->data, "DO phase is complete2\n"));
4487 /***********************************************************************
4489 * ftp_regular_transfer()
4491 * The input argument is already checked for validity.
4493 * Performs all commands done before a regular transfer between a local and a
4496 * ftp->ctl_valid starts out as FALSE, and gets set to TRUE if we reach the
4497 * ftp_done() function without finding any major problem.
4500 CURLcode ftp_regular_transfer(struct connectdata *conn,
4503 CURLcode result=CURLE_OK;
4504 bool connected=FALSE;
4505 struct SessionHandle *data = conn->data;
4506 struct ftp_conn *ftpc = &conn->proto.ftpc;
4507 data->req.size = -1; /* make sure this is unknown at this point */
4509 Curl_pgrsSetUploadCounter(data, 0);
4510 Curl_pgrsSetDownloadCounter(data, 0);
4511 Curl_pgrsSetUploadSize(data, 0);
4512 Curl_pgrsSetDownloadSize(data, 0);
4514 ftpc->ctl_valid = TRUE; /* starts good */
4516 result = ftp_perform(conn,
4517 &connected, /* have we connected after PASV/PORT */
4518 dophase_done); /* all commands in the DO-phase done? */
4520 if(CURLE_OK == result) {
4523 /* the DO phase has not completed yet */
4526 result = ftp_dophase_done(conn, connected);
4537 static CURLcode ftp_setup_connection(struct connectdata * conn)
4539 struct SessionHandle *data = conn->data;
4543 if(conn->bits.httpproxy && !data->set.tunnel_thru_httpproxy) {
4544 /* Unless we have asked to tunnel ftp operations through the proxy, we
4545 switch and use HTTP operations only */
4546 #ifndef CURL_DISABLE_HTTP
4547 if(conn->handler == &Curl_handler_ftp)
4548 conn->handler = &Curl_handler_ftp_proxy;
4551 conn->handler = &Curl_handler_ftps_proxy;
4553 failf(data, "FTPS not supported!");
4554 return CURLE_UNSUPPORTED_PROTOCOL;
4558 * We explicitly mark this connection as persistent here as we're doing
4559 * FTP over HTTP and thus we accidentally avoid setting this value
4562 conn->bits.close = FALSE;
4564 failf(data, "FTP over http proxy requires HTTP support built-in!");
4565 return CURLE_UNSUPPORTED_PROTOCOL;
4569 data->state.path++; /* don't include the initial slash */
4570 data->state.slash_removed = TRUE; /* we've skipped the slash */
4572 /* FTP URLs support an extension like ";type=<typecode>" that
4573 * we'll try to get now! */
4574 type = strstr(data->state.path, ";type=");
4577 type = strstr(conn->host.rawalloc, ";type=");
4580 *type = 0; /* it was in the middle of the hostname */
4581 command = Curl_raw_toupper(type[6]);
4582 conn->bits.type_set = TRUE;
4585 case 'A': /* ASCII mode */
4586 data->set.prefer_ascii = TRUE;
4589 case 'D': /* directory mode */
4590 data->set.ftp_list_only = TRUE;
4593 case 'I': /* binary mode */
4595 /* switch off ASCII */
4596 data->set.prefer_ascii = FALSE;
4604 #endif /* CURL_DISABLE_FTP */