1 /* $NetBSD: ftp.c,v 1.160 2010/03/05 07:41:10 lukem Exp $ */
4 * Copyright (c) 1996-2009 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
33 * Copyright (c) 1985, 1989, 1993, 1994
34 * The Regents of the University of California. All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * Copyright (C) 1997 and 1998 WIDE Project.
63 * All rights reserved.
65 * Redistribution and use in source and binary forms, with or without
66 * modification, are permitted provided that the following conditions
68 * 1. Redistributions of source code must retain the above copyright
69 * notice, this list of conditions and the following disclaimer.
70 * 2. Redistributions in binary form must reproduce the above copyright
71 * notice, this list of conditions and the following disclaimer in the
72 * documentation and/or other materials provided with the distribution.
73 * 3. Neither the name of the project nor the names of its contributors
74 * may be used to endorse or promote products derived from this software
75 * without specific prior written permission.
77 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
78 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
79 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
80 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
81 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
82 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
83 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
84 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
85 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
86 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
90 #include <sys/cdefs.h>
93 static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94";
95 __RCSID("$NetBSD: ftp.c,v 1.160 2010/03/05 07:41:10 lukem Exp $");
99 #include <sys/types.h>
100 #include <sys/stat.h>
101 #include <sys/socket.h>
102 #include <sys/time.h>
104 #include <netinet/in.h>
105 #include <netinet/in_systm.h>
106 #include <netinet/ip.h>
107 #include <arpa/inet.h>
108 #include <arpa/ftp.h>
109 #include <arpa/telnet.h>
125 volatile sig_atomic_t abrtflag;
126 volatile sig_atomic_t timeoutflag;
131 char pasv[BUFSIZ]; /* passive port for proxy data connection */
133 static int empty(FILE *, FILE *, int);
137 struct sockaddr_in su_sin;
139 struct sockaddr_in6 su_sin6;
142 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
147 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
148 # define su_len si_len
150 # define su_len si_su.su_sin.sin_len
152 #define su_family si_su.su_sin.sin_family
153 #define su_port si_su.su_sin.sin_port
155 struct sockinet myctladdr, hisctladdr, data_addr;
158 hookup(const char *host, const char *port)
161 struct addrinfo hints, *res, *res0;
162 static char hostnamebuf[MAXHOSTNAMELEN];
166 memset((char *)&hisctladdr, 0, sizeof (hisctladdr));
167 memset((char *)&myctladdr, 0, sizeof (myctladdr));
168 memset(&hints, 0, sizeof(hints));
169 hints.ai_flags = AI_CANONNAME;
170 hints.ai_family = family;
171 hints.ai_socktype = SOCK_STREAM;
172 hints.ai_protocol = 0;
173 error = getaddrinfo(host, port, &hints, &res0);
175 warnx("Can't lookup `%s:%s': %s", host, port,
176 (error == EAI_SYSTEM) ? strerror(errno)
177 : gai_strerror(error));
182 if (res0->ai_canonname)
183 (void)strlcpy(hostnamebuf, res0->ai_canonname,
184 sizeof(hostnamebuf));
186 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf));
187 hostname = hostnamebuf;
189 for (res = res0; res; res = res->ai_next) {
190 char hname[NI_MAXHOST], sname[NI_MAXSERV];
193 if (getnameinfo(res->ai_addr, res->ai_addrlen,
194 hname, sizeof(hname), sname, sizeof(sname),
195 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
196 strlcpy(hname, "?", sizeof(hname));
197 strlcpy(sname, "?", sizeof(sname));
199 if (verbose && res0->ai_next) {
200 /* if we have multiple possibilities */
201 fprintf(ttyout, "Trying %s:%s ...\n", hname, sname);
203 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol);
205 warn("Can't create socket for connection to `%s:%s'",
209 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) {
215 /* finally we got one */
219 warnx("Can't connect to `%s:%s'", host, port);
224 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen);
225 hisctladdr.su_len = res->ai_addrlen;
229 len = hisctladdr.su_len;
230 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) {
231 warn("Can't determine my address of connection to `%s:%s'",
236 myctladdr.su_len = len;
238 #ifdef IPTOS_LOWDELAY
239 if (hisctladdr.su_family == AF_INET) {
240 int tos = IPTOS_LOWDELAY;
241 if (setsockopt(s, IPPROTO_IP, IP_TOS,
242 (void *)&tos, sizeof(tos)) == -1) {
243 DWARN("setsockopt %s (ignored)",
248 cin = fdopen(s, "r");
249 cout = fdopen(s, "w");
250 if (cin == NULL || cout == NULL) {
251 warnx("Can't fdopen socket");
260 fprintf(ttyout, "Connected to %s.\n", hostname);
261 if (getreply(0) > 2) { /* read startup message from server */
270 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE,
271 (void *)&on, sizeof(on)) == -1) {
272 DWARN("setsockopt %s (ignored)", "SO_OOBINLINE");
282 cmdabort(int notused)
289 write(fileno(ttyout), "\n", 1);
292 siglongjmp(ptabort, 1);
297 cmdtimeout(int notused)
303 write(fileno(ttyout), "\n", 1);
306 siglongjmp(ptabort, 1);
312 command(const char *fmt, ...)
320 fputs("---> ", ttyout);
322 if (strncmp("PASS ", fmt, 5) == 0)
323 fputs("PASS XXXX", ttyout);
324 else if (strncmp("ACCT ", fmt, 5) == 0)
325 fputs("ACCT XXXX", ttyout);
327 vfprintf(ttyout, fmt, ap);
333 warnx("No control connection for command");
340 oldsigint = xsignal(SIGINT, cmdabort);
343 vfprintf(cout, fmt, ap);
348 r = getreply(!strcmp(fmt, "QUIT"));
349 if (abrtflag && oldsigint != SIG_IGN)
350 (*oldsigint)(SIGINT);
351 (void)xsignal(SIGINT, oldsigint);
355 static const char *m421[] = {
356 "remote server timed out. Connection closed",
357 "user interrupt. Connection closed",
358 "remote server has closed connection",
362 getreply(int expecteof)
364 char current_line[BUFSIZ]; /* last line of previous reply */
367 int originalcode = 0, continuation = 0;
368 sigfunc oldsigint, oldsigalrm;
370 char *cp, *pt = pasv;
375 oldsigint = xsignal(SIGINT, cmdabort);
376 oldsigalrm = xsignal(SIGALRM, cmdtimeout);
378 for (lineno = 0 ;; lineno++) {
381 while (alarmtimer(quit_time ? quit_time : 60),
382 ((c = getc(cin)) != '\n')) {
383 if (c == IAC) { /* handle telnet commands */
384 switch (c = getc(cin)) {
388 fprintf(cout, "%c%c%c", IAC, DONT, c);
394 fprintf(cout, "%c%c%c", IAC, WONT, c);
405 * these will get trashed by pswitch()
408 int reply_timeoutflag = timeoutflag;
409 int reply_abrtflag = abrtflag;
412 if (expecteof && feof(cin)) {
413 (void)xsignal(SIGINT, oldsigint);
414 (void)xsignal(SIGALRM, oldsigalrm);
422 if (reply_timeoutflag)
424 else if (reply_abrtflag)
428 (void)fprintf(ttyout,
429 "421 Service not available, %s.\n", m421[midx]);
430 (void)fflush(ttyout);
433 (void)xsignal(SIGINT, oldsigint);
434 (void)xsignal(SIGALRM, oldsigalrm);
437 if (c != '\r' && (verbose > 0 ||
438 ((verbose > -1 && n == '5' && dig > 4) &&
439 (((!n && c < '5') || (n && n < '5'))
440 || !retry_connect)))) {
442 (dig == 1 || (dig == 5 && verbose == 0)))
443 fprintf(ttyout, "%s:", hostname);
444 (void)putc(c, ttyout);
446 if (dig < 4 && isdigit(c))
447 code = code * 10 + (c - '0');
448 if (!pflag && (code == 227 || code == 228))
450 else if (!pflag && code == 229)
452 if (dig > 4 && pflag == 1 && isdigit(c))
455 if (c != '\r' && c != ')') {
456 if (pt < &pasv[sizeof(pasv) - 1])
463 if (pflag == 100 && c == '(')
465 if (dig == 4 && c == '-') {
472 if (cp < ¤t_line[sizeof(current_line) - 1])
475 if (verbose > 0 || ((verbose > -1 && n == '5') &&
476 (n < '5' || !retry_connect))) {
477 (void)putc(c, ttyout);
478 (void)fflush(ttyout);
484 (void)strlcpy(reply_string, current_line,
485 sizeof(reply_string));
486 if (lineno > 0 && code == 0 && reply_callback != NULL)
487 (*reply_callback)(current_line);
488 if (continuation && code != originalcode) {
489 if (originalcode == 0)
496 (void)xsignal(SIGINT, oldsigint);
497 (void)xsignal(SIGALRM, oldsigalrm);
498 if (code == 421 || originalcode == 421)
500 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN)
501 (*oldsigint)(SIGINT);
502 if (timeoutflag && oldsigalrm != cmdtimeout &&
503 oldsigalrm != SIG_IGN)
504 (*oldsigalrm)(SIGINT);
510 empty(FILE *ecin, FILE *din, int sec)
513 struct pollfd pfd[2];
517 pfd[nfd].fd = fileno(ecin);
518 pfd[nfd++].events = POLLIN;
522 pfd[nfd].fd = fileno(din);
523 pfd[nfd++].events = POLLIN;
526 if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0)
532 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0;
534 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0;
538 sigjmp_buf xferabort;
541 abortxfer(int notused)
550 switch (direction[0]) {
552 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf));
555 strlcpy(msgbuf, "\nsend", sizeof(msgbuf));
558 errx(1, "abortxfer: unknown direction `%s'", direction);
560 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n",
562 write(fileno(ttyout), msgbuf, len);
563 siglongjmp(xferabort, 1);
567 * Read data from infd & write to outfd, using buf/bufsize as the temporary
568 * buffer, dealing with short writes.
569 * If rate_limit != 0, rate-limit the transfer.
570 * If hash_interval != 0, fputc('c', ttyout) every hash_interval bytes.
571 * Updates global variables: bytes.
572 * Returns 0 if ok, 1 if there was a read error, 2 if there was a write error.
573 * In the case of error, errno contains the appropriate error code.
576 copy_bytes(int infd, int outfd, char *buf, size_t bufsize,
577 int rate_limit, int hash_interval)
579 volatile off_t hashc;
582 struct timeval tvthen, tvnow, tvdiff;
583 off_t bufrem, bufchunk;
586 hashc = hash_interval;
588 bufchunk = rate_limit;
594 (void)gettimeofday(&tvthen, NULL);
598 /* copy bufchunk at a time */
601 inc = read(infd, buf, MIN((off_t)bufsize, bufrem));
608 outc = write(outfd, bufp, inc);
615 while (bytes >= hashc) {
616 (void)putc('#', ttyout);
617 hashc += hash_interval;
619 (void)fflush(ttyout);
622 if (rate_limit) { /* rate limited; wait if necessary */
624 (void)gettimeofday(&tvnow, NULL);
625 timersub(&tvnow, &tvthen, &tvdiff);
626 if (tvdiff.tv_sec > 0)
628 usleep(1000000 - tvdiff.tv_usec);
635 if (hash_interval && bytes > 0) {
636 if (bytes < hash_interval)
637 (void)putc('#', ttyout);
638 (void)putc('\n', ttyout);
639 (void)fflush(ttyout);
651 sendrequest(const char *cmd, const char *local, const char *remote,
658 int (*volatile closefunc)(FILE *);
659 sigfunc volatile oldintr;
660 sigfunc volatile oldintp;
661 off_t volatile hashbytes;
664 static size_t bufsize;
673 oprogress = progress;
674 if (verbose && printnames) {
676 fprintf(ttyout, "local: %s ", local);
678 fprintf(ttyout, "remote: %s\n", remote);
681 proxtrans(cmd, local, remote);
690 if (sigsetjmp(xferabort, 1)) {
696 (void)xsignal(SIGQUIT, psummary);
697 oldintr = xsignal(SIGINT, abortxfer);
698 if (strcmp(local, "-") == 0) {
701 } else if (*local == '|') {
702 oldintp = xsignal(SIGPIPE, SIG_IGN);
703 fin = popen(local + 1, "r");
705 warn("Can't execute `%s'", local + 1);
712 fin = fopen(local, "r");
714 warn("Can't open `%s'", local);
719 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) {
720 fprintf(ttyout, "%s: not a plain file.\n", local);
724 filesize = st.st_size;
730 if (sigsetjmp(xferabort, 1))
734 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) {
740 rc = fseeko(fin, restart_point, SEEK_SET);
744 rc = lseek(fileno(fin), restart_point, SEEK_SET);
748 warn("Can't seek to restart `%s'", local);
751 if (command("REST " LLF, (LLT)restart_point) != CONTINUE)
756 if (command("%s %s", cmd, remote) != PRELIM)
759 if (command("%s", cmd) != PRELIM)
763 dout = dataconn(lmode);
767 if ((size_t)sndbuf_size > bufsize) {
770 bufsize = sndbuf_size;
771 buf = ftp_malloc(bufsize);
775 oldintp = xsignal(SIGPIPE, SIG_IGN);
776 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;
782 c = copy_bytes(fileno(fin), fileno(dout), buf, bufsize,
783 rate_put, hash_interval);
785 warn("Reading `%s'", local);
788 warn("Writing to network");
794 while ((c = getc(fin)) != EOF) {
796 while (hash_interval && bytes >= hashbytes) {
797 (void)putc('#', ttyout);
798 (void)fflush(ttyout);
803 (void)putc('\r', dout);
808 #if 0 /* this violates RFC 959 */
810 (void)putc('\0', dout);
816 if (bytes < hashbytes)
817 (void)putc('#', ttyout);
818 (void)putc('\n', ttyout);
821 warn("Reading `%s'", local);
824 warn("Writing to network");
831 if (closefunc != NULL) {
843 (void)xsignal(SIGINT, oldintr);
864 (void)xsignal(SIGINT, oldintr);
866 (void)xsignal(SIGPIPE, oldintp);
871 if (closefunc != NULL && fin != NULL)
875 progress = oprogress;
881 recvrequest(const char *cmd, const char *volatile local, const char *remote,
882 const char *lmode, int printnames, int ignorespecial)
886 int (*volatile closefunc)(FILE *);
887 sigfunc volatile oldintr;
888 sigfunc volatile oldintp;
890 int volatile is_retr;
891 int volatile tcrflag;
892 int volatile bare_lfs;
893 static size_t bufsize;
895 off_t volatile hashbytes;
899 struct timeval tval[2];
906 direction = "received";
910 oprogress = progress;
911 opreserve = preserve;
912 is_retr = (strcmp(cmd, "RETR") == 0);
913 if (is_retr && verbose && printnames) {
914 if (ignorespecial || *local != '-')
915 fprintf(ttyout, "local: %s ", local);
917 fprintf(ttyout, "remote: %s\n", remote);
919 if (proxy && is_retr) {
920 proxtrans(cmd, local, remote);
926 tcrflag = !crflag && is_retr;
927 if (sigsetjmp(xferabort, 1)) {
933 (void)xsignal(SIGQUIT, psummary);
934 oldintr = xsignal(SIGINT, abortxfer);
935 if (ignorespecial || (strcmp(local, "-") && *local != '|')) {
936 if (access(local, W_OK) < 0) {
937 char *dir = strrchr(local, '/');
939 if (errno != ENOENT && errno != EACCES) {
940 warn("Can't access `%s'", local);
946 d = access(dir == local ? "/" :
947 dir ? local : ".", W_OK);
951 warn("Can't access `%s'", local);
955 if (!runique && errno == EACCES &&
956 chmod(local, (S_IRUSR|S_IWUSR)) < 0) {
957 warn("Can't chmod `%s'", local);
961 if (runique && errno == EACCES &&
962 (local = gunique(local)) == NULL) {
967 else if (runique && (local = gunique(local)) == NULL) {
973 if (curtype != TYPE_A)
974 changetype(TYPE_A, 0);
978 filesize = remotesize(remote, 0);
979 if (code == 421 || code == -1)
986 if (sigsetjmp(xferabort, 1))
988 if (is_retr && restart_point &&
989 command("REST " LLF, (LLT) restart_point) != CONTINUE)
991 if (! EMPTYSTRING(remote)) {
992 if (command("%s %s", cmd, remote) != PRELIM)
995 if (command("%s", cmd) != PRELIM)
1001 if (!ignorespecial && strcmp(local, "-") == 0) {
1005 } else if (!ignorespecial && *local == '|') {
1006 oldintp = xsignal(SIGPIPE, SIG_IGN);
1007 fout = popen(local + 1, "w");
1009 warn("Can't execute `%s'", local+1);
1016 fout = fopen(local, lmode);
1018 warn("Can't open `%s'", local);
1024 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) {
1028 if ((size_t)rcvbuf_size > bufsize) {
1031 bufsize = rcvbuf_size;
1032 buf = ftp_malloc(bufsize);
1036 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;
1042 if (is_retr && restart_point &&
1043 lseek(fileno(fout), restart_point, SEEK_SET) < 0) {
1044 warn("Can't seek to restart `%s'", local);
1047 c = copy_bytes(fileno(din), fileno(fout), buf, bufsize,
1048 rate_get, hash_interval);
1051 warn("Reading from network");
1053 } else if (c == 2) {
1054 warn("Writing `%s'", local);
1059 if (is_retr && restart_point) {
1063 if (fseeko(fout, (off_t)0, SEEK_SET) < 0)
1065 for (i = 0; i++ < restart_point;) {
1066 if ((ch = getc(fout)) == EOF)
1071 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) {
1073 warn("Can't seek to restart `%s'", local);
1077 while ((c = getc(din)) != EOF) {
1081 while (hash_interval && bytes >= hashbytes) {
1082 (void)putc('#', ttyout);
1083 (void)fflush(ttyout);
1087 if ((c = getc(din)) != '\n' || tcrflag) {
1090 (void)putc('\r', fout);
1099 (void)putc(c, fout);
1104 if (hash_interval) {
1105 if (bytes < hashbytes)
1106 (void)putc('#', ttyout);
1107 (void)putc('\n', ttyout);
1111 warn("Reading from network");
1115 warn("Writing `%s'", local);
1120 if (closefunc != NULL) {
1129 "WARNING! %d bare linefeeds received in ASCII mode.\n",
1131 fputs("File may not have transferred correctly.\n", ttyout);
1133 if (bytes >= 0 && is_retr) {
1136 if (preserve && (closefunc == fclose)) {
1137 mtime = remotemodtime(remote, 0);
1139 (void)gettimeofday(&tval[0], NULL);
1140 tval[1].tv_sec = mtime;
1141 tval[1].tv_usec = 0;
1142 if (utimes(local, tval) == -1) {
1144 "Can't change modification time on %s to %s",
1146 rfc2822time(localtime(&mtime)));
1155 * abort using RFC 959 recommended IP,SYNC sequence
1157 if (! sigsetjmp(xferabort, 1)) {
1158 /* this is the first call */
1159 (void)xsignal(SIGINT, abort_squared);
1172 (void)xsignal(SIGINT, oldintr);
1174 (void)xsignal(SIGPIPE, oldintp);
1179 if (closefunc != NULL && fout != NULL)
1183 progress = oprogress;
1184 preserve = opreserve;
1189 * Need to start a listen on the data channel before we send the command,
1190 * otherwise the server's connect may fail.
1196 int result, tmpno = 0;
1199 unsigned int addr[16], port[2];
1200 unsigned int af, hal, pal;
1202 const char *pasvcmd = NULL;
1207 if (myctladdr.su_family == AF_INET6 && ftp_debug &&
1208 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) ||
1209 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) {
1210 warnx("Use of scoped addresses can be troublesome");
1217 data_addr = myctladdr;
1218 data = socket(data_addr.su_family, SOCK_STREAM, 0);
1220 warn("Can't create socket for data connection");
1223 if ((options & SO_DEBUG) &&
1224 setsockopt(data, SOL_SOCKET, SO_DEBUG,
1225 (void *)&on, sizeof(on)) == -1) {
1226 DWARN("setsockopt %s (ignored)", "SO_DEBUG");
1228 result = COMPLETE + 1;
1229 switch (data_addr.su_family) {
1231 if (epsv4 && !epsv4bad) {
1236 result = command("EPSV");
1239 (result == COMPLETE || !connected))
1240 fprintf(ttyout, "%s\n", reply_string);
1244 * this code is to be friendly with broken
1247 if (code / 10 == 22 && code != 229) {
1249 "wrong server: return code must be 229\n",
1251 result = COMPLETE + 1;
1253 if (result != COMPLETE) {
1255 DPRINTF("disabling epsv4 for this "
1259 if (result != COMPLETE) {
1261 result = command("PASV");
1268 if (epsv6 && !epsv6bad) {
1273 result = command("EPSV");
1276 (result == COMPLETE || !connected))
1277 fprintf(ttyout, "%s\n", reply_string);
1281 * this code is to be friendly with
1284 if (code / 10 == 22 && code != 229) {
1286 "wrong server: return code must be 229\n",
1288 result = COMPLETE + 1;
1290 if (result != COMPLETE) {
1292 DPRINTF("disabling epsv6 for this "
1296 if (result != COMPLETE) {
1298 result = command("LPSV");
1305 result = COMPLETE + 1;
1308 if (result != COMPLETE) {
1309 if (activefallback) {
1318 fputs("Passive mode refused.\n", ttyout);
1322 #define pack2(var, off) \
1323 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0))
1324 #define pack4(var, off) \
1325 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \
1326 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0))
1327 #define UC(b) (((int)b)&0xff)
1330 * What we've got at this point is a string of comma separated
1331 * one-byte unsigned integer values, separated by commas.
1333 if (strcmp(pasvcmd, "PASV") == 0) {
1334 if (data_addr.su_family != AF_INET) {
1336 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1340 if (code / 10 == 22 && code != 227) {
1341 fputs("wrong server: return code must be 227\n",
1346 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u",
1347 &addr[0], &addr[1], &addr[2], &addr[3],
1348 &port[0], &port[1]);
1351 "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1356 memset(&data_addr, 0, sizeof(data_addr));
1357 data_addr.su_family = AF_INET;
1358 data_addr.su_len = sizeof(struct sockaddr_in);
1359 data_addr.si_su.su_sin.sin_addr.s_addr =
1360 htonl(pack4(addr, 0));
1361 data_addr.su_port = htons(pack2(port, 0));
1362 } else if (strcmp(pasvcmd, "LPSV") == 0) {
1363 if (code / 10 == 22 && code != 228) {
1364 fputs("wrong server: return code must be 228\n",
1369 switch (data_addr.su_family) {
1371 error = sscanf(pasv,
1372 "%u,%u,%u,%u,%u,%u,%u,%u,%u",
1374 &addr[0], &addr[1], &addr[2], &addr[3],
1375 &pal, &port[0], &port[1]);
1378 "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1382 if (af != 4 || hal != 4 || pal != 2) {
1384 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1390 memset(&data_addr, 0, sizeof(data_addr));
1391 data_addr.su_family = AF_INET;
1392 data_addr.su_len = sizeof(struct sockaddr_in);
1393 data_addr.si_su.su_sin.sin_addr.s_addr =
1394 htonl(pack4(addr, 0));
1395 data_addr.su_port = htons(pack2(port, 0));
1399 error = sscanf(pasv,
1400 "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u",
1402 &addr[0], &addr[1], &addr[2], &addr[3],
1403 &addr[4], &addr[5], &addr[6], &addr[7],
1404 &addr[8], &addr[9], &addr[10],
1405 &addr[11], &addr[12], &addr[13],
1406 &addr[14], &addr[15],
1407 &pal, &port[0], &port[1]);
1410 "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1414 if (af != 6 || hal != 16 || pal != 2) {
1416 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1422 memset(&data_addr, 0, sizeof(data_addr));
1423 data_addr.su_family = AF_INET6;
1424 data_addr.su_len = sizeof(struct sockaddr_in6);
1427 for (i = 0; i < sizeof(struct in6_addr); i++) {
1428 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] =
1432 data_addr.su_port = htons(pack2(port, 0));
1438 } else if (strcmp(pasvcmd, "EPSV") == 0) {
1442 if (code / 10 == 22 && code != 229) {
1443 fputs("wrong server: return code must be 229\n",
1448 if (sscanf(pasv, "%c%c%c%d%c", &delim[0],
1449 &delim[1], &delim[2], &port[1],
1451 fputs("parse error!\n", ttyout);
1455 if (delim[0] != delim[1] || delim[0] != delim[2]
1456 || delim[0] != delim[3]) {
1457 fputs("parse error!\n", ttyout);
1461 data_addr = hisctladdr;
1462 data_addr.su_port = htons(port[1]);
1466 if (ftp_connect(data, (struct sockaddr *)&data_addr.si_su,
1467 data_addr.su_len) < 0) {
1468 if (activefallback) {
1479 #ifdef IPTOS_THROUGHPUT
1480 if (data_addr.su_family == AF_INET) {
1481 on = IPTOS_THROUGHPUT;
1482 if (setsockopt(data, IPPROTO_IP, IP_TOS,
1483 (void *)&on, sizeof(on)) == -1) {
1484 DWARN("setsockopt %s (ignored)",
1485 "IPTOS_THROUGHPUT");
1493 data_addr = myctladdr;
1495 data_addr.su_port = 0; /* let system pick one */
1498 data = socket(data_addr.su_family, SOCK_STREAM, 0);
1500 warn("Can't create socket for data connection");
1506 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR,
1507 (void *)&on, sizeof(on)) == -1) {
1508 warn("Can't set SO_REUSEADDR on data connection");
1511 if (bind(data, (struct sockaddr *)&data_addr.si_su,
1512 data_addr.su_len) < 0) {
1513 warn("Can't bind for data connection");
1516 if ((options & SO_DEBUG) &&
1517 setsockopt(data, SOL_SOCKET, SO_DEBUG,
1518 (void *)&on, sizeof(on)) == -1) {
1519 DWARN("setsockopt %s (ignored)", "SO_DEBUG");
1521 len = sizeof(data_addr.si_su);
1522 memset((char *)&data_addr, 0, sizeof (data_addr));
1523 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) {
1524 warn("Can't determine my address of data connection");
1527 data_addr.su_len = len;
1528 if (ftp_listen(data, 1) < 0)
1529 warn("Can't listen to data connection");
1532 char hname[NI_MAXHOST], sname[NI_MAXSERV];
1533 struct sockinet tmp;
1535 switch (data_addr.su_family) {
1537 if (!epsv4 || epsv4bad) {
1538 result = COMPLETE + 1;
1544 if (!epsv6 || epsv6bad) {
1545 result = COMPLETE + 1;
1549 af = (data_addr.su_family == AF_INET) ? 1 : 2;
1552 if (tmp.su_family == AF_INET6)
1553 tmp.si_su.su_sin6.sin6_scope_id = 0;
1555 if (getnameinfo((struct sockaddr *)&tmp.si_su,
1556 tmp.su_len, hname, sizeof(hname), sname,
1557 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) {
1563 result = command("EPRT |%u|%s|%s|", af, hname,
1567 (result == COMPLETE || !connected))
1568 fprintf(ttyout, "%s\n", reply_string);
1571 if (result != COMPLETE) {
1573 DPRINTF("disabling epsv4 for this "
1579 result = COMPLETE + 1;
1582 if (result == COMPLETE)
1585 switch (data_addr.su_family) {
1587 a = (char *)&data_addr.si_su.su_sin.sin_addr;
1588 p = (char *)&data_addr.su_port;
1589 result = command("PORT %d,%d,%d,%d,%d,%d",
1590 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
1591 UC(p[0]), UC(p[1]));
1595 a = (char *)&data_addr.si_su.su_sin6.sin6_addr;
1596 p = (char *)&data_addr.su_port;
1598 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
1600 UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]),
1601 UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]),
1602 UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]),
1603 UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]),
1604 2, UC(p[0]), UC(p[1]));
1608 result = COMPLETE + 1; /* xxx */
1614 if (result == ERROR && sendport == -1) {
1619 return (result != COMPLETE);
1623 #ifdef IPTOS_THROUGHPUT
1624 if (data_addr.su_family == AF_INET) {
1625 on = IPTOS_THROUGHPUT;
1626 if (setsockopt(data, IPPROTO_IP, IP_TOS,
1627 (void *)&on, sizeof(on)) == -1) {
1628 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
1642 dataconn(const char *lmode)
1644 struct sockinet from;
1645 int s, flags, rv, timeout;
1646 struct timeval endtime, now, td;
1647 struct pollfd pfd[1];
1650 if (passivemode) /* passive data connection */
1651 return (fdopen(data, lmode));
1653 /* active mode data connection */
1655 if ((flags = fcntl(data, F_GETFL, 0)) == -1)
1656 goto dataconn_failed; /* get current socket flags */
1657 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1)
1658 goto dataconn_failed; /* set non-blocking connect */
1660 /* NOTE: we now must restore socket flags on successful exit */
1662 /* limit time waiting on listening socket */
1664 pfd[0].events = POLLIN;
1665 (void)gettimeofday(&endtime, NULL); /* determine end time */
1666 endtime.tv_sec += (quit_time > 0) ? quit_time: 60;
1667 /* without -q, default to 60s */
1669 (void)gettimeofday(&now, NULL);
1670 timersub(&endtime, &now, &td);
1671 timeout = td.tv_sec * 1000 + td.tv_usec/1000;
1674 rv = ftp_poll(pfd, 1, timeout);
1675 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */
1677 warn("Can't poll waiting before accept");
1678 goto dataconn_failed;
1681 warnx("Poll timeout waiting before accept");
1682 goto dataconn_failed;
1685 /* (non-blocking) accept the connection */
1686 fromlen = myctladdr.su_len;
1688 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen);
1689 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */
1691 warn("Can't accept data connection");
1692 goto dataconn_failed;
1697 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */
1698 goto dataconn_failed;
1700 #ifdef IPTOS_THROUGHPUT
1701 if (from.su_family == AF_INET) {
1702 int tos = IPTOS_THROUGHPUT;
1703 if (setsockopt(s, IPPROTO_IP, IP_TOS,
1704 (void *)&tos, sizeof(tos)) == -1) {
1705 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
1709 return (fdopen(data, lmode));
1718 psabort(int notused)
1732 static struct comvars {
1734 char name[MAXHOSTNAMELEN];
1735 struct sockinet mctl;
1736 struct sockinet hctl;
1749 char mi[MAXPATHLEN];
1750 char mo[MAXPATHLEN];
1751 } proxstruct, tmpstruct;
1752 struct comvars *ip, *op;
1755 oldintr = xsignal(SIGINT, psabort);
1769 ip->connect = connected;
1770 connected = op->connect;
1772 (void)strlcpy(ip->name, hostname, sizeof(ip->name));
1775 hostname = op->name;
1776 ip->hctl = hisctladdr;
1777 hisctladdr = op->hctl;
1778 ip->mctl = myctladdr;
1779 myctladdr = op->mctl;
1786 ip->curtpe = curtype;
1787 curtype = op->curtpe;
1790 ip->sunqe = sunique;
1791 sunique = op->sunqe;
1792 ip->runqe = runique;
1793 runique = op->runqe;
1798 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti));
1799 (void)strlcpy(ntin, op->nti, sizeof(ntin));
1800 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto));
1801 (void)strlcpy(ntout, op->nto, sizeof(ntout));
1802 ip->mapflg = mapflag;
1803 mapflag = op->mapflg;
1804 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi));
1805 (void)strlcpy(mapin, op->mi, sizeof(mapin));
1806 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo));
1807 (void)strlcpy(mapout, op->mo, sizeof(mapout));
1808 (void)xsignal(SIGINT, oldintr);
1816 abortpt(int notused)
1822 write(fileno(ttyout), "\n", 1);
1826 siglongjmp(ptabort, 1);
1830 proxtrans(const char *cmd, const char *local, const char *remote)
1832 sigfunc volatile oldintr;
1833 int prox_type, nfnd;
1834 int volatile secndflag;
1835 const char *volatile cmd2;
1839 if (strcmp(cmd, "RETR"))
1842 cmd2 = runique ? "STOU" : "STOR";
1843 if ((prox_type = type) == 0) {
1844 if (unix_server && unix_proxy)
1849 if (curtype != prox_type)
1850 changetype(prox_type, 1);
1851 if (command("PASV") != COMPLETE) {
1852 fputs("proxy server does not support third party transfers.\n",
1858 fputs("No primary connection.\n", ttyout);
1863 if (curtype != prox_type)
1864 changetype(prox_type, 1);
1865 if (command("PORT %s", pasv) != COMPLETE) {
1869 if (sigsetjmp(ptabort, 1))
1871 oldintr = xsignal(SIGINT, abortpt);
1872 if ((restart_point &&
1873 (command("REST " LLF, (LLT) restart_point) != CONTINUE))
1874 || (command("%s %s", cmd, remote) != PRELIM)) {
1875 (void)xsignal(SIGINT, oldintr);
1882 if ((restart_point &&
1883 (command("REST " LLF, (LLT) restart_point) != CONTINUE))
1884 || (command("%s %s", cmd2, local) != PRELIM))
1890 (void)xsignal(SIGINT, oldintr);
1893 fprintf(ttyout, "local: %s remote: %s\n", local, remote);
1896 if (sigsetjmp(xferabort, 1)) {
1897 (void)xsignal(SIGINT, oldintr);
1900 (void)xsignal(SIGINT, abort_squared);
1902 if (strcmp(cmd, "RETR") && !proxy)
1904 else if (!strcmp(cmd, "RETR") && proxy)
1906 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */
1907 if (command("%s %s", cmd2, local) != PRELIM) {
1915 (void)xsignal(SIGINT, oldintr);
1921 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */
1922 if (command("%s %s", cmd2, local) != PRELIM) {
1929 (void)xsignal(SIGINT, oldintr);
1937 if ((nfnd = empty(cin, NULL, 10)) <= 0) {
1939 warn("Error aborting proxy command");
1952 (void)xsignal(SIGINT, oldintr);
1956 reset(int argc, char *argv[])
1960 if (argc == 0 && argv != NULL) {
1961 UPRINTF("usage: %s\n", argv[0]);
1966 if ((nfnd = empty(cin, NULL, 0)) < 0) {
1967 warn("Error resetting connection");
1976 gunique(const char *local)
1978 static char new[MAXPATHLEN];
1979 char *cp = strrchr(local, '/');
1980 int d, count=0, len;
1985 d = access(cp == local ? "/" : cp ? local : ".", W_OK);
1989 warn("Can't access `%s'", local);
1992 len = strlcpy(new, local, sizeof(new));
1996 if (++count == 100) {
1997 fputs("runique: can't find unique file name.\n",
2007 if ((d = access(new, F_OK)) < 0)
2011 else if (*(cp - 2) == '.')
2014 *(cp - 2) = *(cp - 2) + 1;
2023 * aborts abort_remote(). lostpeer() is called because if the user is
2024 * too impatient to wait or there's another problem then ftp really
2025 * needs to get back to a known state.
2028 abort_squared(int dummy)
2035 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n",
2037 write(fileno(ttyout), msgbuf, len);
2039 siglongjmp(xferabort, 1);
2043 abort_remote(FILE *din)
2049 warnx("Lost control connection for abort");
2056 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark
2057 * after urgent byte rather than before as is protocol now
2062 if (send(fileno(cout), buf, 3, MSG_OOB) != 3)
2063 warn("Can't send abort message");
2064 fprintf(cout, "%cABOR\r\n", DM);
2066 if ((nfnd = empty(cin, din, 10)) <= 0) {
2068 warn("Can't send abort message");
2073 if (din && (nfnd & 2)) {
2074 while (read(fileno(din), buf, BUFSIZ) > 0)
2077 if (getreply(0) == ERROR && code == 552) {
2078 /* 552 needed for nic style abort */
2085 * Ensure that ai->ai_addr is NOT an IPv4 mapped address.
2086 * IPv4 mapped address complicates too many things in FTP
2087 * protocol handling, as FTP protocol is defined differently
2088 * between IPv4 and IPv6.
2090 * This may not be the best way to handle this situation,
2091 * since the semantics of IPv4 mapped address is defined in
2092 * the kernel. There are configurations where we should use
2093 * IPv4 mapped address as native IPv6 address, not as
2094 * "an IPv6 address that embeds IPv4 address" (namely, SIIT).
2096 * More complete solution would be to have an additional
2097 * getsockopt to grab "real" peername/sockname. "real"
2098 * peername/sockname will be AF_INET if IPv4 mapped address
2099 * is used to embed IPv4 address, and will be AF_INET6 if
2100 * we use it as native. What a mess!
2103 ai_unmapped(struct addrinfo *ai)
2106 struct sockaddr_in6 *sin6;
2107 struct sockaddr_in sin;
2110 if (ai->ai_family != AF_INET6)
2112 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) ||
2113 sizeof(sin) > ai->ai_addrlen)
2115 sin6 = (struct sockaddr_in6 *)ai->ai_addr;
2116 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
2119 memset(&sin, 0, sizeof(sin));
2120 sin.sin_family = AF_INET;
2121 len = sizeof(struct sockaddr_in);
2122 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
2123 sizeof(sin.sin_addr));
2124 sin.sin_port = sin6->sin6_port;
2126 ai->ai_family = AF_INET;
2127 #if defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
2130 memcpy(ai->ai_addr, &sin, len);
2131 ai->ai_addrlen = len;
2139 fputs("Usage error\n", ttyout);