2 * SPDX-License-Identifier: (BSD-3-Clause AND Beerware)
4 * Copyright (c) 1998-2011 Dag-Erling Smørgrav
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer
12 * in this position and unchanged.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 * $FreeBSD: head/lib/libfetch/ftp.c 341013 2018-11-27 10:45:14Z des $
34 * Portions of this code were taken from or based on ftpio.c:
36 * ----------------------------------------------------------------------------
37 * "THE BEER-WARE LICENSE" (Revision 42):
38 * <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
39 * can do whatever you want with this stuff. If we meet some day, and you think
40 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
41 * ----------------------------------------------------------------------------
45 * Dag-Erling Smørgrav
48 * Incorporated into libfetch
53 * Turned inside out. Now returns xfers as new file ids, not as a special
56 * $ftpioId: ftpio.c,v 1.30 1998/04/11 07:28:53 phk Exp $
60 #include <sys/param.h>
61 #include <sys/socket.h>
62 #include <netinet/in.h>
81 #define FTP_ANONYMOUS_USER "anonymous"
83 #define FTP_CONNECTION_ALREADY_OPEN 125
84 #define FTP_OPEN_DATA_CONNECTION 150
86 #define FTP_FILE_STATUS 213
87 #define FTP_SERVICE_READY 220
88 #define FTP_TRANSFER_COMPLETE 226
89 #define FTP_PASSIVE_MODE 227
90 #define FTP_LPASSIVE_MODE 228
91 #define FTP_EPASSIVE_MODE 229
92 #define FTP_LOGGED_IN 230
93 #define FTP_FILE_ACTION_OK 250
94 #define FTP_DIRECTORY_CREATED 257 /* multiple meanings */
95 #define FTP_FILE_CREATED 257 /* multiple meanings */
96 #define FTP_WORKING_DIRECTORY 257 /* multiple meanings */
97 #define FTP_NEED_PASSWORD 331
98 #define FTP_NEED_ACCOUNT 332
99 #define FTP_FILE_OK 350
100 #define FTP_SYNTAX_ERROR 500
101 #define FTP_PROTOCOL_ERROR 999
103 static int ftp_cmd(conn_t *, const char *, ...) __printflike(2, 3);
104 static struct url cached_host;
105 static conn_t *cached_connection;
107 #define isftpreply(foo) \
108 (isdigit((unsigned char)foo[0]) && \
109 isdigit((unsigned char)foo[1]) && \
110 isdigit((unsigned char)foo[2]) && \
111 (foo[3] == ' ' || foo[3] == '\0'))
112 #define isftpinfo(foo) \
113 (isdigit((unsigned char)foo[0]) && \
114 isdigit((unsigned char)foo[1]) && \
115 isdigit((unsigned char)foo[2]) && \
119 * Translate IPv4 mapped IPv6 address to IPv4 address
122 unmappedaddr(struct sockaddr_in6 *sin6)
124 struct sockaddr_in *sin4;
128 if (sin6->sin6_family != AF_INET6 ||
129 !IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
131 sin4 = (struct sockaddr_in *)sin6;
132 addr = *(u_int32_t *)(uintptr_t)&sin6->sin6_addr.s6_addr[12];
133 port = sin6->sin6_port;
134 memset(sin4, 0, sizeof(struct sockaddr_in));
135 sin4->sin_addr.s_addr = addr;
136 sin4->sin_port = port;
137 sin4->sin_family = AF_INET;
138 sin4->sin_len = sizeof(struct sockaddr_in);
142 * Get server response
145 ftp_chkerr(conn_t *conn)
147 if (fetch_getln(conn) == -1) {
151 if (isftpinfo(conn->buf)) {
152 while (conn->buflen && !isftpreply(conn->buf)) {
153 if (fetch_getln(conn) == -1) {
160 while (conn->buflen &&
161 isspace((unsigned char)conn->buf[conn->buflen - 1]))
163 conn->buf[conn->buflen] = '\0';
165 if (!isftpreply(conn->buf)) {
166 ftp_seterr(FTP_PROTOCOL_ERROR);
170 conn->err = (conn->buf[0] - '0') * 100
171 + (conn->buf[1] - '0') * 10
172 + (conn->buf[2] - '0');
178 * Send a command and check reply
181 ftp_cmd(conn_t *conn, const char *fmt, ...)
189 len = vasprintf(&msg, fmt, ap);
198 r = fetch_putln(conn, msg, len);
206 return (ftp_chkerr(conn));
210 * Return a pointer to the filename part of a path
213 ftp_filename(const char *file, int *len, int *type)
217 if ((s = strrchr(file, '/')) == NULL)
222 if (*len > 7 && strncmp(s + *len - 7, ";type=", 6) == 0) {
232 * Get current working directory from the reply to a CWD, PWD or CDUP
236 ftp_pwd(conn_t *conn, char *pwd, size_t pwdlen)
238 char *src, *dst, *end;
241 if (conn->err != FTP_WORKING_DIRECTORY &&
242 conn->err != FTP_FILE_ACTION_OK)
243 return (FTP_PROTOCOL_ERROR);
244 end = conn->buf + conn->buflen;
246 if (src >= end || *src++ != '"')
247 return (FTP_PROTOCOL_ERROR);
248 for (q = 0, dst = pwd; src < end && pwdlen--; ++src) {
249 if (!q && *src == '"')
251 else if (q && *src != '"')
259 return (FTP_PROTOCOL_ERROR);
262 DEBUGF("pwd: [%s]\n", pwd);
268 * Change working directory to the directory that contains the specified
272 ftp_cwd(conn_t *conn, const char *file)
274 const char *beg, *end;
278 /* If no slashes in name, no need to change dirs. */
279 if ((end = strrchr(file, '/')) == NULL)
281 if ((e = ftp_cmd(conn, "PWD")) != FTP_WORKING_DIRECTORY ||
282 (e = ftp_pwd(conn, pwd, sizeof(pwd))) != FTP_OK) {
289 /* Look for a common prefix between PWD and dir to fetch. */
290 for (i = 0; i <= len && i <= end - file; ++i)
291 if (pwd[i] != file[i])
294 DEBUGF("have: [%.*s|%s]\n", i, pwd, pwd + i);
295 DEBUGF("want: [%.*s|%s]\n", i, file, file + i);
297 /* Keep going up a dir until we have a matching prefix. */
298 if (pwd[i] == '\0' && (file[i - 1] == '/' || file[i] == '/'))
300 if ((e = ftp_cmd(conn, "CDUP")) != FTP_FILE_ACTION_OK ||
301 (e = ftp_cmd(conn, "PWD")) != FTP_WORKING_DIRECTORY ||
302 (e = ftp_pwd(conn, pwd, sizeof(pwd))) != FTP_OK) {
308 #ifdef FTP_COMBINE_CWDS
309 /* Skip leading slashes, even "////". */
310 for (beg = file + i; beg < end && *beg == '/'; ++beg, ++i)
313 /* If there is no trailing dir, we're already there. */
317 /* Change to the directory all in one chunk (e.g., foo/bar/baz). */
318 e = ftp_cmd(conn, "CWD %.*s", (int)(end - beg), beg);
319 if (e == FTP_FILE_ACTION_OK)
321 #endif /* FTP_COMBINE_CWDS */
323 /* That didn't work so go back to legacy behavior (multiple CWDs). */
324 for (beg = file + i; beg < end; beg = file + i + 1) {
327 for (++i; file + i < end && file[i] != '/'; ++i)
329 e = ftp_cmd(conn, "CWD %.*s", (int)(file + i - beg), beg);
330 if (e != FTP_FILE_ACTION_OK) {
339 * Set transfer mode and data type
342 ftp_mode_type(conn_t *conn, int mode, int type)
353 return (FTP_PROTOCOL_ERROR);
355 if ((e = ftp_cmd(conn, "MODE %c", mode)) != FTP_OK) {
358 * Stream mode is supposed to be the default - so
359 * much so that some servers not only do not
360 * support any other mode, but do not support the
361 * MODE command at all.
363 * If "MODE S" fails, it is unlikely that we
364 * previously succeeded in setting a different
365 * mode. Therefore, we simply hope that the
366 * server is already in the correct mode, and
367 * silently ignore the failure.
388 /* can't handle yet */
390 return (FTP_PROTOCOL_ERROR);
392 if ((e = ftp_cmd(conn, "TYPE %c", type)) != FTP_OK)
399 * Request and parse file stats
402 ftp_stat(conn_t *conn, const char *file, struct url_stat *us)
405 const char *filename;
406 int filenamelen, type;
412 us->atime = us->mtime = 0;
414 filename = ftp_filename(file, &filenamelen, &type);
416 if ((e = ftp_mode_type(conn, 0, type)) != FTP_OK) {
421 e = ftp_cmd(conn, "SIZE %.*s", filenamelen, filename);
422 if (e != FTP_FILE_STATUS) {
426 for (ln = conn->buf + 4; *ln && isspace((unsigned char)*ln); ln++)
428 for (us->size = 0; *ln && isdigit((unsigned char)*ln); ln++)
429 us->size = us->size * 10 + *ln - '0';
430 if (*ln && !isspace((unsigned char)*ln)) {
431 ftp_seterr(FTP_PROTOCOL_ERROR);
437 DEBUGF("size: [%lld]\n", (long long)us->size);
439 e = ftp_cmd(conn, "MDTM %.*s", filenamelen, filename);
440 if (e != FTP_FILE_STATUS) {
444 for (ln = conn->buf + 4; *ln && isspace((unsigned char)*ln); ln++)
446 switch (strspn(ln, "0123456789")) {
455 ftp_seterr(FTP_PROTOCOL_ERROR);
458 if (sscanf(ln, "%04d%02d%02d%02d%02d%02d",
459 &tm.tm_year, &tm.tm_mon, &tm.tm_mday,
460 &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) {
461 ftp_seterr(FTP_PROTOCOL_ERROR);
472 DEBUGF("last modified: [%04d-%02d-%02d %02d:%02d:%02d]\n",
473 tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
474 tm.tm_hour, tm.tm_min, tm.tm_sec);
479 * I/O functions for FTP
482 conn_t *cconn; /* Control connection */
483 conn_t *dconn; /* Data connection */
484 int dir; /* Direction */
485 int eof; /* EOF reached */
486 int err; /* Error code */
489 static int ftp_readfn(void *, char *, int);
490 static int ftp_writefn(void *, const char *, int);
491 static fpos_t ftp_seekfn(void *, fpos_t, int);
492 static int ftp_closefn(void *);
495 ftp_readfn(void *v, char *buf, int len)
500 io = (struct ftpio *)v;
505 if (io->cconn == NULL || io->dconn == NULL || io->dir == O_WRONLY) {
515 r = fetch_read(io->dconn, buf, len);
528 ftp_writefn(void *v, const char *buf, int len)
533 io = (struct ftpio *)v;
538 if (io->cconn == NULL || io->dconn == NULL || io->dir == O_RDONLY) {
546 w = fetch_write(io->dconn, buf, len);
555 ftp_seekfn(void *v, fpos_t pos __unused, int whence __unused)
559 io = (struct ftpio *)v;
574 io = (struct ftpio *)v;
581 if (io->cconn == NULL || io->dconn == NULL) {
585 fetch_close(io->dconn);
588 DEBUGF("Waiting for final status\n");
589 r = ftp_chkerr(io->cconn);
590 if (io->cconn == cached_connection && io->cconn->ref == 1)
591 cached_connection = NULL;
592 fetch_close(io->cconn);
594 return (r == FTP_TRANSFER_COMPLETE) ? 0 : -1;
598 ftp_setup(conn_t *cconn, conn_t *dconn, int mode)
603 if (cconn == NULL || dconn == NULL)
605 if ((io = malloc(sizeof(*io))) == NULL)
610 io->eof = io->err = 0;
611 f = funopen(io, ftp_readfn, ftp_writefn, ftp_seekfn, ftp_closefn);
621 ftp_transfer(conn_t *conn, const char *oper, const char *file,
622 int mode, off_t offset, const char *flags)
624 struct sockaddr_storage sa;
625 struct sockaddr_in6 *sin6;
626 struct sockaddr_in *sin4;
627 const char *bindaddr;
628 const char *filename;
629 int filenamelen, type;
630 int low, pasv, verbose;
637 low = CHECK_FLAG('l');
638 pasv = CHECK_FLAG('p') || !CHECK_FLAG('P');
639 verbose = CHECK_FLAG('v');
642 if ((s = getenv("FTP_PASSIVE_MODE")) != NULL)
643 pasv = (strncasecmp(s, "no", 2) != 0);
645 /* isolate filename */
646 filename = ftp_filename(file, &filenamelen, &type);
648 /* set transfer mode and data type */
649 if ((e = ftp_mode_type(conn, 0, type)) != FTP_OK)
652 /* find our own address, bind, and listen */
654 if (getsockname(conn->sd, (struct sockaddr *)&sa, &l) == -1)
656 if (sa.ss_family == AF_INET6)
657 unmappedaddr((struct sockaddr_in6 *)&sa);
659 /* open data socket */
660 if ((sd = socket(sa.ss_family, SOCK_STREAM, IPPROTO_TCP)) == -1) {
671 /* send PASV command */
673 fetch_info("setting passive mode");
674 switch (sa.ss_family) {
676 if ((e = ftp_cmd(conn, "PASV")) != FTP_PASSIVE_MODE)
680 if ((e = ftp_cmd(conn, "EPSV")) != FTP_EPASSIVE_MODE) {
683 if ((e = ftp_cmd(conn, "LPSV")) !=
689 e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */
694 * Find address and port number. The reply to the PASV command
695 * is IMHO the one and only weak point in the FTP protocol.
699 case FTP_PASSIVE_MODE:
700 case FTP_LPASSIVE_MODE:
701 for (p = ln + 3; *p && !isdigit((unsigned char)*p); p++)
704 e = FTP_PROTOCOL_ERROR;
707 l = (e == FTP_PASSIVE_MODE ? 6 : 21);
708 for (i = 0; *p && i < l; i++, p++)
709 addr[i] = strtol(p, &p, 10);
711 e = FTP_PROTOCOL_ERROR;
715 case FTP_EPASSIVE_MODE:
716 for (p = ln + 3; *p && *p != '('; p++)
719 e = FTP_PROTOCOL_ERROR;
723 if (sscanf(p, "%c%c%c%d%c", &addr[0], &addr[1], &addr[2],
724 &port, &addr[3]) != 5 ||
725 addr[0] != addr[1] ||
726 addr[0] != addr[2] || addr[0] != addr[3]) {
727 e = FTP_PROTOCOL_ERROR;
733 /* seek to required offset */
735 if (ftp_cmd(conn, "REST %lu", (u_long)offset) != FTP_FILE_OK)
738 /* construct sockaddr for data socket */
740 if (getpeername(conn->sd, (struct sockaddr *)&sa, &l) == -1)
742 if (sa.ss_family == AF_INET6)
743 unmappedaddr((struct sockaddr_in6 *)&sa);
744 switch (sa.ss_family) {
746 sin6 = (struct sockaddr_in6 *)&sa;
747 if (e == FTP_EPASSIVE_MODE)
748 sin6->sin6_port = htons(port);
750 memcpy(&sin6->sin6_addr, addr + 2, 16);
751 memcpy(&sin6->sin6_port, addr + 19, 2);
755 sin4 = (struct sockaddr_in *)&sa;
756 if (e == FTP_EPASSIVE_MODE)
757 sin4->sin_port = htons(port);
759 memcpy(&sin4->sin_addr, addr, 4);
760 memcpy(&sin4->sin_port, addr + 4, 2);
764 e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */
768 /* connect to data port */
770 fetch_info("opening data connection");
771 bindaddr = getenv("FETCH_BIND_ADDRESS");
772 if (bindaddr != NULL && *bindaddr != '\0' &&
773 (e = fetch_bind(sd, sa.ss_family, bindaddr)) != 0)
775 if (connect(sd, (struct sockaddr *)&sa, sa.ss_len) == -1)
778 /* make the server initiate the transfer */
780 fetch_info("initiating transfer");
781 e = ftp_cmd(conn, "%s %.*s", oper, filenamelen, filename);
782 if (e != FTP_CONNECTION_ALREADY_OPEN && e != FTP_OPEN_DATA_CONNECTION)
790 char hname[INET6_ADDRSTRLEN];
792 switch (sa.ss_family) {
794 ((struct sockaddr_in6 *)&sa)->sin6_port = 0;
795 #ifdef IPV6_PORTRANGE
796 arg = low ? IPV6_PORTRANGE_DEFAULT : IPV6_PORTRANGE_HIGH;
797 if (setsockopt(sd, IPPROTO_IPV6, IPV6_PORTRANGE,
798 (char *)&arg, sizeof(arg)) == -1)
803 ((struct sockaddr_in *)&sa)->sin_port = 0;
804 arg = low ? IP_PORTRANGE_DEFAULT : IP_PORTRANGE_HIGH;
805 if (setsockopt(sd, IPPROTO_IP, IP_PORTRANGE,
806 (char *)&arg, sizeof(arg)) == -1)
811 fetch_info("binding data socket");
812 if (bind(sd, (struct sockaddr *)&sa, sa.ss_len) == -1)
814 if (listen(sd, 1) == -1)
817 /* find what port we're on and tell the server */
818 if (getsockname(sd, (struct sockaddr *)&sa, &l) == -1)
820 switch (sa.ss_family) {
822 sin4 = (struct sockaddr_in *)&sa;
823 a = ntohl(sin4->sin_addr.s_addr);
824 p = ntohs(sin4->sin_port);
825 e = ftp_cmd(conn, "PORT %d,%d,%d,%d,%d,%d",
826 (a >> 24) & 0xff, (a >> 16) & 0xff,
827 (a >> 8) & 0xff, a & 0xff,
828 (p >> 8) & 0xff, p & 0xff);
831 #define UC(b) (((int)b)&0xff)
833 sin6 = (struct sockaddr_in6 *)&sa;
834 sin6->sin6_scope_id = 0;
835 if (getnameinfo((struct sockaddr *)&sa, sa.ss_len,
836 hname, sizeof(hname),
837 NULL, 0, NI_NUMERICHOST) == 0) {
838 e = ftp_cmd(conn, "EPRT |%d|%s|%d|", 2, hname,
839 htons(sin6->sin6_port));
844 ap = (char *)&sin6->sin6_addr;
846 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
848 UC(ap[0]), UC(ap[1]), UC(ap[2]), UC(ap[3]),
849 UC(ap[4]), UC(ap[5]), UC(ap[6]), UC(ap[7]),
850 UC(ap[8]), UC(ap[9]), UC(ap[10]), UC(ap[11]),
851 UC(ap[12]), UC(ap[13]), UC(ap[14]), UC(ap[15]),
853 (ntohs(sin6->sin6_port) >> 8) & 0xff,
854 ntohs(sin6->sin6_port) & 0xff);
858 e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */
864 /* seek to required offset */
866 if (ftp_cmd(conn, "REST %ju", (uintmax_t)offset) != FTP_FILE_OK)
869 /* make the server initiate the transfer */
871 fetch_info("initiating transfer");
872 e = ftp_cmd(conn, "%s %.*s", oper, filenamelen, filename);
873 if (e != FTP_CONNECTION_ALREADY_OPEN && e != FTP_OPEN_DATA_CONNECTION)
876 /* accept the incoming connection and go to town */
877 if ((d = accept(sd, NULL, NULL)) == -1)
883 if ((df = ftp_setup(conn, fetch_reopen(sd), mode)) == NULL)
905 ftp_authenticate(conn_t *conn, struct url *url, struct url *purl)
907 const char *user, *pwd, *logname;
908 char pbuf[MAXHOSTNAMELEN + MAXLOGNAME + 1];
911 /* XXX FTP_AUTH, and maybe .netrc */
913 /* send user name and password */
914 if (url->user[0] == '\0')
915 fetch_netrc_auth(url);
918 if ((user = getenv("FTP_LOGIN")) != NULL)
919 DEBUGF("FTP_LOGIN=%s\n", user);
920 if (user == NULL || *user == '\0')
921 user = FTP_ANONYMOUS_USER;
922 if (purl && url->port == fetch_default_port(url->scheme))
923 e = ftp_cmd(conn, "USER %s@%s", user, url->host);
925 e = ftp_cmd(conn, "USER %s@%s@%d", user, url->host, url->port);
927 e = ftp_cmd(conn, "USER %s", user);
929 /* did the server request a password? */
930 if (e == FTP_NEED_PASSWORD) {
933 if ((pwd = getenv("FTP_PASSWORD")) != NULL)
934 DEBUGF("FTP_PASSWORD=%s\n", pwd);
935 if (pwd == NULL || *pwd == '\0') {
936 if ((logname = getlogin()) == NULL)
937 logname = FTP_ANONYMOUS_USER;
938 if ((len = snprintf(pbuf, MAXLOGNAME + 1, "%s@", logname)) < 0)
940 else if (len > MAXLOGNAME)
942 gethostname(pbuf + len, sizeof(pbuf) - len);
945 e = ftp_cmd(conn, "PASS %s", pwd);
952 * Log on to FTP server
955 ftp_connect(struct url *url, struct url *purl, const char *flags)
958 int e, direct, verbose;
965 direct = CHECK_FLAG('d');
966 verbose = CHECK_FLAG('v');
969 else if (CHECK_FLAG('6'))
975 /* check for proxy */
977 /* XXX proxy authentication! */
978 conn = fetch_connect(purl->host, purl->port, af, verbose);
980 /* no proxy, go straight to target */
981 conn = fetch_connect(url->host, url->port, af, verbose);
985 /* check connection */
987 /* fetch_connect() has already set an error code */
990 /* expect welcome message */
991 if ((e = ftp_chkerr(conn)) != FTP_SERVICE_READY)
995 if ((e = ftp_authenticate(conn, url, purl)) != FTP_LOGGED_IN)
998 /* TODO: Request extended features supported, if any (RFC 3659). */
1011 * Disconnect from server
1014 ftp_disconnect(conn_t *conn)
1016 (void)ftp_cmd(conn, "QUIT");
1017 if (conn == cached_connection && conn->ref == 1)
1018 cached_connection = NULL;
1023 * Check if we're already connected
1026 ftp_isconnected(struct url *url)
1028 return (cached_connection
1029 && (strcmp(url->host, cached_host.host) == 0)
1030 && (strcmp(url->user, cached_host.user) == 0)
1031 && (strcmp(url->pwd, cached_host.pwd) == 0)
1032 && (url->port == cached_host.port));
1036 * Check the cache, reconnect if no luck
1039 ftp_cached_connect(struct url *url, struct url *purl, const char *flags)
1044 /* set default port */
1046 url->port = fetch_default_port(url->scheme);
1048 /* try to use previously cached connection */
1049 if (ftp_isconnected(url)) {
1050 e = ftp_cmd(cached_connection, "NOOP");
1051 if (e == FTP_OK || e == FTP_SYNTAX_ERROR)
1052 return (fetch_ref(cached_connection));
1055 /* connect to server */
1056 if ((conn = ftp_connect(url, purl, flags)) == NULL)
1058 if (cached_connection)
1059 ftp_disconnect(cached_connection);
1060 cached_connection = fetch_ref(conn);
1061 memcpy(&cached_host, url, sizeof(*url));
1066 * Check the proxy settings
1069 ftp_get_proxy(struct url * url, const char *flags)
1074 if (flags != NULL && strchr(flags, 'd') != NULL)
1076 if (fetch_no_proxy_match(url->host))
1078 if (((p = getenv("FTP_PROXY")) || (p = getenv("ftp_proxy")) ||
1079 (p = getenv("HTTP_PROXY")) || (p = getenv("http_proxy"))) &&
1080 *p && (purl = fetchParseURL(p)) != NULL) {
1081 if (!*purl->scheme) {
1082 if (getenv("FTP_PROXY") || getenv("ftp_proxy"))
1083 strcpy(purl->scheme, SCHEME_FTP);
1085 strcpy(purl->scheme, SCHEME_HTTP);
1088 purl->port = fetch_default_proxy_port(purl->scheme);
1089 if (strcmp(purl->scheme, SCHEME_FTP) == 0 ||
1090 strcmp(purl->scheme, SCHEME_HTTP) == 0)
1098 * Process an FTP request
1101 ftp_request(struct url *url, const char *op, struct url_stat *us,
1102 struct url *purl, const char *flags)
1107 /* check if we should use HTTP instead */
1108 if (purl && (strcmp(purl->scheme, SCHEME_HTTP) == 0 ||
1109 strcmp(purl->scheme, SCHEME_HTTPS) == 0)) {
1110 if (strcmp(op, "STAT") == 0)
1111 return (http_request(url, "HEAD", us, purl, flags));
1112 else if (strcmp(op, "RETR") == 0)
1113 return (http_request(url, "GET", us, purl, flags));
1115 * Our HTTP code doesn't support PUT requests yet, so try
1116 * a direct connection.
1120 /* connect to server */
1121 conn = ftp_cached_connect(url, purl, flags);
1127 /* change directory */
1128 if (ftp_cwd(conn, url->doc) == -1)
1132 if (us && ftp_stat(conn, url->doc, us) == -1
1133 && fetchLastErrCode != FETCH_PROTO
1134 && fetchLastErrCode != FETCH_UNAVAIL)
1138 if (strcmp(op, "STAT") == 0) {
1140 ftp_disconnect(conn);
1141 return (FILE *)1; /* bogus return value */
1143 if (strcmp(op, "STOR") == 0 || strcmp(op, "APPE") == 0)
1148 /* initiate the transfer */
1149 return (ftp_transfer(conn, op, url->doc, oflag, url->offset, flags));
1152 ftp_disconnect(conn);
1160 fetchXGetFTP(struct url *url, struct url_stat *us, const char *flags)
1162 return (ftp_request(url, "RETR", us, ftp_get_proxy(url, flags), flags));
1169 fetchGetFTP(struct url *url, const char *flags)
1171 return (fetchXGetFTP(url, NULL, flags));
1178 fetchPutFTP(struct url *url, const char *flags)
1180 return (ftp_request(url, CHECK_FLAG('a') ? "APPE" : "STOR", NULL,
1181 ftp_get_proxy(url, flags), flags));
1188 fetchStatFTP(struct url *url, struct url_stat *us, const char *flags)
1192 f = ftp_request(url, "STAT", us, ftp_get_proxy(url, flags), flags);
1196 * When op is "STAT", ftp_request() will return either NULL or
1197 * (FILE *)1, never a valid FILE *, so we mustn't fclose(f) before
1198 * returning, as it would cause a segfault.
1207 fetchListFTP(struct url *url __unused, const char *flags __unused)
1209 warnx("fetchListFTP(): not implemented");