1 /* $NetBSD: ftp.c,v 1.164 2012/07/04 06:09:37 is 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 1.164 2012/07/04 06:09:37 is 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>
126 volatile sig_atomic_t abrtflag;
127 volatile sig_atomic_t timeoutflag;
132 char pasv[BUFSIZ]; /* passive port for proxy data connection */
134 static int empty(FILE *, FILE *, int);
135 __dead static void abort_squared(int);
139 struct sockaddr_in su_sin;
141 struct sockaddr_in6 su_sin6;
144 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
149 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
150 # define su_len si_len
152 # define su_len si_su.su_sin.sin_len
154 #define su_family si_su.su_sin.sin_family
155 #define su_port si_su.su_sin.sin_port
157 struct sockinet myctladdr, hisctladdr, data_addr;
160 hookup(const char *host, const char *port)
163 struct addrinfo hints, *res, *res0;
164 static char hostnamebuf[MAXHOSTNAMELEN];
168 memset((char *)&hisctladdr, 0, sizeof (hisctladdr));
169 memset((char *)&myctladdr, 0, sizeof (myctladdr));
170 memset(&hints, 0, sizeof(hints));
171 hints.ai_flags = AI_CANONNAME;
172 hints.ai_family = family;
173 hints.ai_socktype = SOCK_STREAM;
174 hints.ai_protocol = 0;
175 error = getaddrinfo(host, port, &hints, &res0);
177 warnx("Can't lookup `%s:%s': %s", host, port,
178 (error == EAI_SYSTEM) ? strerror(errno)
179 : gai_strerror(error));
184 if (res0->ai_canonname)
185 (void)strlcpy(hostnamebuf, res0->ai_canonname,
186 sizeof(hostnamebuf));
188 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf));
189 hostname = hostnamebuf;
191 for (res = res0; res; res = res->ai_next) {
192 char hname[NI_MAXHOST], sname[NI_MAXSERV];
195 if (getnameinfo(res->ai_addr, res->ai_addrlen,
196 hname, sizeof(hname), sname, sizeof(sname),
197 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
198 strlcpy(hname, "?", sizeof(hname));
199 strlcpy(sname, "?", sizeof(sname));
201 if (verbose && res0->ai_next) {
202 /* if we have multiple possibilities */
203 fprintf(ttyout, "Trying %s:%s ...\n", hname, sname);
205 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol);
207 warn("Can't create socket for connection to `%s:%s'",
211 if (ftp_connect(s, res->ai_addr, res->ai_addrlen,
212 verbose || !res->ai_next) < 0) {
218 /* finally we got one */
222 warnx("Can't connect to `%s:%s'", host, port);
227 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen);
228 hisctladdr.su_len = res->ai_addrlen;
232 len = hisctladdr.su_len;
233 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) {
234 warn("Can't determine my address of connection to `%s:%s'",
239 myctladdr.su_len = len;
241 #ifdef IPTOS_LOWDELAY
242 if (hisctladdr.su_family == AF_INET) {
243 int tos = IPTOS_LOWDELAY;
244 if (setsockopt(s, IPPROTO_IP, IP_TOS,
245 (void *)&tos, sizeof(tos)) == -1) {
246 DWARN("setsockopt %s (ignored)",
251 cin = fdopen(s, "r");
252 cout = fdopen(s, "w");
253 if (cin == NULL || cout == NULL) {
254 warnx("Can't fdopen socket");
263 fprintf(ttyout, "Connected to %s.\n", hostname);
264 if (getreply(0) > 2) { /* read startup message from server */
273 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE,
274 (void *)&on, sizeof(on)) == -1) {
275 DWARN("setsockopt %s (ignored)", "SO_OOBINLINE");
285 cmdabort(int notused)
292 write(fileno(ttyout), "\n", 1);
295 siglongjmp(ptabort, 1);
300 cmdtimeout(int notused)
306 write(fileno(ttyout), "\n", 1);
309 siglongjmp(ptabort, 1);
315 command(const char *fmt, ...)
323 fputs("---> ", ttyout);
325 if (strncmp("PASS ", fmt, 5) == 0)
326 fputs("PASS XXXX", ttyout);
327 else if (strncmp("ACCT ", fmt, 5) == 0)
328 fputs("ACCT XXXX", ttyout);
330 vfprintf(ttyout, fmt, ap);
336 warnx("No control connection for command");
343 oldsigint = xsignal(SIGINT, cmdabort);
346 vfprintf(cout, fmt, ap);
351 r = getreply(!strcmp(fmt, "QUIT"));
352 if (abrtflag && oldsigint != SIG_IGN)
353 (*oldsigint)(SIGINT);
354 (void)xsignal(SIGINT, oldsigint);
358 static const char *m421[] = {
359 "remote server timed out. Connection closed",
360 "user interrupt. Connection closed",
361 "remote server has closed connection",
365 getreply(int expecteof)
367 char current_line[BUFSIZ]; /* last line of previous reply */
370 int originalcode = 0, continuation = 0;
371 sigfunc oldsigint, oldsigalrm;
373 char *cp, *pt = pasv;
378 oldsigint = xsignal(SIGINT, cmdabort);
379 oldsigalrm = xsignal(SIGALRM, cmdtimeout);
381 for (lineno = 0 ;; lineno++) {
384 while (alarmtimer(quit_time ? quit_time : 60),
385 ((c = getc(cin)) != '\n')) {
386 if (c == IAC) { /* handle telnet commands */
387 switch (c = getc(cin)) {
391 fprintf(cout, "%c%c%c", IAC, DONT, c);
397 fprintf(cout, "%c%c%c", IAC, WONT, c);
408 * these will get trashed by pswitch()
411 int reply_timeoutflag = timeoutflag;
412 int reply_abrtflag = abrtflag;
415 if (expecteof && feof(cin)) {
416 (void)xsignal(SIGINT, oldsigint);
417 (void)xsignal(SIGALRM, oldsigalrm);
425 if (reply_timeoutflag)
427 else if (reply_abrtflag)
431 (void)fprintf(ttyout,
432 "421 Service not available, %s.\n", m421[midx]);
433 (void)fflush(ttyout);
436 (void)xsignal(SIGINT, oldsigint);
437 (void)xsignal(SIGALRM, oldsigalrm);
440 if (c != '\r' && (verbose > 0 ||
441 ((verbose > -1 && n == '5' && dig > 4) &&
442 (((!n && c < '5') || (n && n < '5'))
443 || !retry_connect)))) {
445 (dig == 1 || (dig == 5 && verbose == 0)))
446 fprintf(ttyout, "%s:", hostname);
447 (void)putc(c, ttyout);
449 if (dig < 4 && isdigit(c))
450 code = code * 10 + (c - '0');
451 if (!pflag && (code == 227 || code == 228))
453 else if (!pflag && code == 229)
455 if (dig > 4 && pflag == 1 && isdigit(c))
458 if (c != '\r' && c != ')') {
459 if (pt < &pasv[sizeof(pasv) - 1])
466 if (pflag == 100 && c == '(')
468 if (dig == 4 && c == '-') {
475 if (cp < ¤t_line[sizeof(current_line) - 1])
478 if (verbose > 0 || ((verbose > -1 && n == '5') &&
479 (n < '5' || !retry_connect))) {
480 (void)putc(c, ttyout);
481 (void)fflush(ttyout);
487 (void)strlcpy(reply_string, current_line,
488 sizeof(reply_string));
489 if (lineno > 0 && code == 0 && reply_callback != NULL)
490 (*reply_callback)(current_line);
491 if (continuation && code != originalcode) {
492 if (originalcode == 0)
499 (void)xsignal(SIGINT, oldsigint);
500 (void)xsignal(SIGALRM, oldsigalrm);
501 if (code == 421 || originalcode == 421)
503 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN)
504 (*oldsigint)(SIGINT);
505 if (timeoutflag && oldsigalrm != cmdtimeout &&
506 oldsigalrm != SIG_IGN)
507 (*oldsigalrm)(SIGINT);
513 empty(FILE *ecin, FILE *din, int sec)
516 struct pollfd pfd[2];
520 pfd[nfd].fd = fileno(ecin);
521 pfd[nfd++].events = POLLIN;
525 pfd[nfd].fd = fileno(din);
526 pfd[nfd++].events = POLLIN;
529 if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0)
535 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0;
537 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0;
541 sigjmp_buf xferabort;
544 abortxfer(int notused)
553 switch (direction[0]) {
555 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf));
558 strlcpy(msgbuf, "\nsend", sizeof(msgbuf));
561 errx(1, "abortxfer: unknown direction `%s'", direction);
563 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n",
565 write(fileno(ttyout), msgbuf, len);
566 siglongjmp(xferabort, 1);
570 * Read data from infd & write to outfd, using buf/bufsize as the temporary
571 * buffer, dealing with short writes.
572 * If rate_limit != 0, rate-limit the transfer.
573 * If hash_interval != 0, fputc('c', ttyout) every hash_interval bytes.
574 * Updates global variables: bytes.
575 * Returns 0 if ok, 1 if there was a read error, 2 if there was a write error.
576 * In the case of error, errno contains the appropriate error code.
579 copy_bytes(int infd, int outfd, char *buf, size_t bufsize,
580 int rate_limit, int hash_interval)
582 volatile off_t hashc;
585 struct timeval tvthen, tvnow, tvdiff;
586 off_t bufrem, bufchunk;
589 hashc = hash_interval;
591 bufchunk = rate_limit;
597 (void)gettimeofday(&tvthen, NULL);
601 /* copy bufchunk at a time */
604 inc = read(infd, buf, MIN((off_t)bufsize, bufrem));
611 outc = write(outfd, bufp, inc);
618 while (bytes >= hashc) {
619 (void)putc('#', ttyout);
620 hashc += hash_interval;
622 (void)fflush(ttyout);
625 if (rate_limit) { /* rate limited; wait if necessary */
627 (void)gettimeofday(&tvnow, NULL);
628 timersub(&tvnow, &tvthen, &tvdiff);
629 if (tvdiff.tv_sec > 0)
631 usleep(1000000 - tvdiff.tv_usec);
638 if (hash_interval && bytes > 0) {
639 if (bytes < hash_interval)
640 (void)putc('#', ttyout);
641 (void)putc('\n', ttyout);
642 (void)fflush(ttyout);
654 sendrequest(const char *cmd, const char *local, const char *remote,
661 int (*volatile closefunc)(FILE *);
662 sigfunc volatile oldintr;
663 sigfunc volatile oldintp;
664 off_t volatile hashbytes;
667 static size_t bufsize;
676 oprogress = progress;
677 if (verbose && printnames) {
679 fprintf(ttyout, "local: %s ", local);
681 fprintf(ttyout, "remote: %s\n", remote);
684 proxtrans(cmd, local, remote);
693 if (sigsetjmp(xferabort, 1)) {
699 (void)xsignal(SIGQUIT, psummary);
700 oldintr = xsignal(SIGINT, abortxfer);
701 if (strcmp(local, "-") == 0) {
704 } else if (*local == '|') {
705 oldintp = xsignal(SIGPIPE, SIG_IGN);
706 fin = popen(local + 1, "r");
708 warn("Can't execute `%s'", local + 1);
715 fin = fopen(local, "r");
717 warn("Can't open `%s'", local);
722 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) {
723 fprintf(ttyout, "%s: not a plain file.\n", local);
727 filesize = st.st_size;
733 if (sigsetjmp(xferabort, 1))
737 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) {
743 rc = fseeko(fin, restart_point, SEEK_SET);
747 rc = lseek(fileno(fin), restart_point, SEEK_SET);
751 warn("Can't seek to restart `%s'", local);
754 if (command("REST " LLF, (LLT)restart_point) != CONTINUE)
759 if (command("%s %s", cmd, remote) != PRELIM)
762 if (command("%s", cmd) != PRELIM)
766 dout = dataconn(lmode);
770 assert(sndbuf_size > 0);
771 if ((size_t)sndbuf_size > bufsize) {
774 bufsize = sndbuf_size;
775 buf = ftp_malloc(bufsize);
779 oldintp = xsignal(SIGPIPE, SIG_IGN);
780 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;
786 c = copy_bytes(fileno(fin), fileno(dout), buf, bufsize,
787 rate_put, hash_interval);
789 warn("Reading `%s'", local);
792 warn("Writing to network");
798 while ((c = getc(fin)) != EOF) {
800 while (hash_interval && bytes >= hashbytes) {
801 (void)putc('#', ttyout);
802 (void)fflush(ttyout);
807 (void)putc('\r', dout);
812 #if 0 /* this violates RFC 959 */
814 (void)putc('\0', dout);
820 if (bytes < hashbytes)
821 (void)putc('#', ttyout);
822 (void)putc('\n', ttyout);
825 warn("Reading `%s'", local);
828 warn("Writing to network");
835 if (closefunc != NULL) {
847 (void)xsignal(SIGINT, oldintr);
868 (void)xsignal(SIGINT, oldintr);
870 (void)xsignal(SIGPIPE, oldintp);
875 if (closefunc != NULL && fin != NULL)
879 progress = oprogress;
885 recvrequest(const char *cmd, const char *volatile local, const char *remote,
886 const char *lmode, int printnames, int ignorespecial)
890 int (*volatile closefunc)(FILE *);
891 sigfunc volatile oldintr;
892 sigfunc volatile oldintp;
894 int volatile is_retr;
895 int volatile tcrflag;
896 int volatile bare_lfs;
897 static size_t bufsize;
899 off_t volatile hashbytes;
903 struct timeval tval[2];
910 direction = "received";
914 oprogress = progress;
915 opreserve = preserve;
916 is_retr = (strcmp(cmd, "RETR") == 0);
917 if (is_retr && verbose && printnames) {
918 if (ignorespecial || *local != '-')
919 fprintf(ttyout, "local: %s ", local);
921 fprintf(ttyout, "remote: %s\n", remote);
923 if (proxy && is_retr) {
924 proxtrans(cmd, local, remote);
930 tcrflag = !crflag && is_retr;
931 if (sigsetjmp(xferabort, 1)) {
937 (void)xsignal(SIGQUIT, psummary);
938 oldintr = xsignal(SIGINT, abortxfer);
939 if (ignorespecial || (strcmp(local, "-") && *local != '|')) {
940 if (access(local, W_OK) < 0) {
941 char *dir = strrchr(local, '/');
943 if (errno != ENOENT && errno != EACCES) {
944 warn("Can't access `%s'", local);
950 d = access(dir == local ? "/" :
951 dir ? local : ".", W_OK);
955 warn("Can't access `%s'", local);
959 if (!runique && errno == EACCES &&
960 chmod(local, (S_IRUSR|S_IWUSR)) < 0) {
961 warn("Can't chmod `%s'", local);
965 if (runique && errno == EACCES &&
966 (local = gunique(local)) == NULL) {
971 else if (runique && (local = gunique(local)) == NULL) {
977 if (curtype != TYPE_A)
978 changetype(TYPE_A, 0);
982 filesize = remotesize(remote, 0);
983 if (code == 421 || code == -1)
990 if (sigsetjmp(xferabort, 1))
992 if (is_retr && restart_point &&
993 command("REST " LLF, (LLT) restart_point) != CONTINUE)
995 if (! EMPTYSTRING(remote)) {
996 if (command("%s %s", cmd, remote) != PRELIM)
999 if (command("%s", cmd) != PRELIM)
1002 din = dataconn("r");
1005 if (!ignorespecial && strcmp(local, "-") == 0) {
1009 } else if (!ignorespecial && *local == '|') {
1010 oldintp = xsignal(SIGPIPE, SIG_IGN);
1011 fout = popen(local + 1, "w");
1013 warn("Can't execute `%s'", local+1);
1020 fout = fopen(local, lmode);
1022 warn("Can't open `%s'", local);
1028 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) {
1032 assert(rcvbuf_size > 0);
1033 if ((size_t)rcvbuf_size > bufsize) {
1036 bufsize = rcvbuf_size;
1037 buf = ftp_malloc(bufsize);
1041 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;
1047 if (is_retr && restart_point &&
1048 lseek(fileno(fout), restart_point, SEEK_SET) < 0) {
1049 warn("Can't seek to restart `%s'", local);
1052 c = copy_bytes(fileno(din), fileno(fout), buf, bufsize,
1053 rate_get, hash_interval);
1056 warn("Reading from network");
1058 } else if (c == 2) {
1059 warn("Writing `%s'", local);
1064 if (is_retr && restart_point) {
1068 if (fseeko(fout, (off_t)0, SEEK_SET) < 0)
1070 for (i = 0; i++ < restart_point;) {
1071 if ((ch = getc(fout)) == EOF)
1076 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) {
1078 warn("Can't seek to restart `%s'", local);
1082 while ((c = getc(din)) != EOF) {
1086 while (hash_interval && bytes >= hashbytes) {
1087 (void)putc('#', ttyout);
1088 (void)fflush(ttyout);
1092 if ((c = getc(din)) != '\n' || tcrflag) {
1095 (void)putc('\r', fout);
1104 (void)putc(c, fout);
1109 if (hash_interval) {
1110 if (bytes < hashbytes)
1111 (void)putc('#', ttyout);
1112 (void)putc('\n', ttyout);
1116 warn("Reading from network");
1120 warn("Writing `%s'", local);
1125 if (closefunc != NULL) {
1134 "WARNING! %d bare linefeeds received in ASCII mode.\n",
1136 fputs("File may not have transferred correctly.\n", ttyout);
1138 if (bytes >= 0 && is_retr) {
1141 if (preserve && (closefunc == fclose)) {
1142 mtime = remotemodtime(remote, 0);
1144 (void)gettimeofday(&tval[0], NULL);
1145 tval[1].tv_sec = mtime;
1146 tval[1].tv_usec = 0;
1147 if (utimes(local, tval) == -1) {
1149 "Can't change modification time on %s to %s",
1151 rfc2822time(localtime(&mtime)));
1160 * abort using RFC 959 recommended IP,SYNC sequence
1162 if (! sigsetjmp(xferabort, 1)) {
1163 /* this is the first call */
1164 (void)xsignal(SIGINT, abort_squared);
1177 (void)xsignal(SIGINT, oldintr);
1179 (void)xsignal(SIGPIPE, oldintp);
1184 if (closefunc != NULL && fout != NULL)
1188 progress = oprogress;
1189 preserve = opreserve;
1194 * Need to start a listen on the data channel before we send the command,
1195 * otherwise the server's connect may fail.
1201 int result, tmpno = 0;
1204 unsigned int addr[16], port[2];
1205 unsigned int af, hal, pal;
1207 const char *pasvcmd = NULL;
1212 if (myctladdr.su_family == AF_INET6 && ftp_debug &&
1213 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) ||
1214 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) {
1215 warnx("Use of scoped addresses can be troublesome");
1222 data_addr = myctladdr;
1223 data = socket(data_addr.su_family, SOCK_STREAM, 0);
1225 warn("Can't create socket for data connection");
1228 if ((options & SO_DEBUG) &&
1229 setsockopt(data, SOL_SOCKET, SO_DEBUG,
1230 (void *)&on, sizeof(on)) == -1) {
1231 DWARN("setsockopt %s (ignored)", "SO_DEBUG");
1233 result = COMPLETE + 1;
1234 switch (data_addr.su_family) {
1236 if (epsv4 && !epsv4bad) {
1241 result = command("EPSV");
1244 (result == COMPLETE || !connected))
1245 fprintf(ttyout, "%s\n", reply_string);
1249 * this code is to be friendly with broken
1252 if (code / 10 == 22 && code != 229) {
1254 "wrong server: return code must be 229\n",
1256 result = COMPLETE + 1;
1258 if (result != COMPLETE) {
1260 DPRINTF("disabling epsv4 for this "
1264 if (result != COMPLETE) {
1266 result = command("PASV");
1273 if (epsv6 && !epsv6bad) {
1278 result = command("EPSV");
1281 (result == COMPLETE || !connected))
1282 fprintf(ttyout, "%s\n", reply_string);
1286 * this code is to be friendly with
1289 if (code / 10 == 22 && code != 229) {
1291 "wrong server: return code must be 229\n",
1293 result = COMPLETE + 1;
1295 if (result != COMPLETE) {
1297 DPRINTF("disabling epsv6 for this "
1301 if (result != COMPLETE) {
1303 result = command("LPSV");
1310 result = COMPLETE + 1;
1313 if (result != COMPLETE) {
1314 if (activefallback) {
1323 fputs("Passive mode refused.\n", ttyout);
1327 #define pack2(var, off) \
1328 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0))
1329 #define pack4(var, off) \
1330 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \
1331 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0))
1332 #define UC(b) (((int)b)&0xff)
1335 * What we've got at this point is a string of comma separated
1336 * one-byte unsigned integer values, separated by commas.
1338 if (strcmp(pasvcmd, "PASV") == 0) {
1339 if (data_addr.su_family != AF_INET) {
1341 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1345 if (code / 10 == 22 && code != 227) {
1346 fputs("wrong server: return code must be 227\n",
1351 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u",
1352 &addr[0], &addr[1], &addr[2], &addr[3],
1353 &port[0], &port[1]);
1356 "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1361 memset(&data_addr, 0, sizeof(data_addr));
1362 data_addr.su_family = AF_INET;
1363 data_addr.su_len = sizeof(struct sockaddr_in);
1364 data_addr.si_su.su_sin.sin_addr.s_addr =
1365 htonl(pack4(addr, 0));
1366 data_addr.su_port = htons(pack2(port, 0));
1367 } else if (strcmp(pasvcmd, "LPSV") == 0) {
1368 if (code / 10 == 22 && code != 228) {
1369 fputs("wrong server: return code must be 228\n",
1374 switch (data_addr.su_family) {
1376 error = sscanf(pasv,
1377 "%u,%u,%u,%u,%u,%u,%u,%u,%u",
1379 &addr[0], &addr[1], &addr[2], &addr[3],
1380 &pal, &port[0], &port[1]);
1383 "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1387 if (af != 4 || hal != 4 || pal != 2) {
1389 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1395 memset(&data_addr, 0, sizeof(data_addr));
1396 data_addr.su_family = AF_INET;
1397 data_addr.su_len = sizeof(struct sockaddr_in);
1398 data_addr.si_su.su_sin.sin_addr.s_addr =
1399 htonl(pack4(addr, 0));
1400 data_addr.su_port = htons(pack2(port, 0));
1404 error = sscanf(pasv,
1405 "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u",
1407 &addr[0], &addr[1], &addr[2], &addr[3],
1408 &addr[4], &addr[5], &addr[6], &addr[7],
1409 &addr[8], &addr[9], &addr[10],
1410 &addr[11], &addr[12], &addr[13],
1411 &addr[14], &addr[15],
1412 &pal, &port[0], &port[1]);
1415 "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1419 if (af != 6 || hal != 16 || pal != 2) {
1421 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1427 memset(&data_addr, 0, sizeof(data_addr));
1428 data_addr.su_family = AF_INET6;
1429 data_addr.su_len = sizeof(struct sockaddr_in6);
1432 for (i = 0; i < sizeof(struct in6_addr); i++) {
1433 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] =
1437 data_addr.su_port = htons(pack2(port, 0));
1443 } else if (strcmp(pasvcmd, "EPSV") == 0) {
1447 if (code / 10 == 22 && code != 229) {
1448 fputs("wrong server: return code must be 229\n",
1453 if (sscanf(pasv, "%c%c%c%d%c", &delim[0],
1454 &delim[1], &delim[2], &port[1],
1456 fputs("parse error!\n", ttyout);
1460 if (delim[0] != delim[1] || delim[0] != delim[2]
1461 || delim[0] != delim[3]) {
1462 fputs("parse error!\n", ttyout);
1466 data_addr = hisctladdr;
1467 data_addr.su_port = htons(port[1]);
1471 if (ftp_connect(data, (struct sockaddr *)&data_addr.si_su,
1472 data_addr.su_len, 1) < 0) {
1473 if (activefallback) {
1484 #ifdef IPTOS_THROUGHPUT
1485 if (data_addr.su_family == AF_INET) {
1486 on = IPTOS_THROUGHPUT;
1487 if (setsockopt(data, IPPROTO_IP, IP_TOS,
1488 (void *)&on, sizeof(on)) == -1) {
1489 DWARN("setsockopt %s (ignored)",
1490 "IPTOS_THROUGHPUT");
1498 data_addr = myctladdr;
1500 data_addr.su_port = 0; /* let system pick one */
1503 data = socket(data_addr.su_family, SOCK_STREAM, 0);
1505 warn("Can't create socket for data connection");
1511 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR,
1512 (void *)&on, sizeof(on)) == -1) {
1513 warn("Can't set SO_REUSEADDR on data connection");
1516 if (bind(data, (struct sockaddr *)&data_addr.si_su,
1517 data_addr.su_len) < 0) {
1518 warn("Can't bind for data connection");
1521 if ((options & SO_DEBUG) &&
1522 setsockopt(data, SOL_SOCKET, SO_DEBUG,
1523 (void *)&on, sizeof(on)) == -1) {
1524 DWARN("setsockopt %s (ignored)", "SO_DEBUG");
1526 len = sizeof(data_addr.si_su);
1527 memset((char *)&data_addr, 0, sizeof (data_addr));
1528 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) {
1529 warn("Can't determine my address of data connection");
1532 data_addr.su_len = len;
1533 if (ftp_listen(data, 1) < 0)
1534 warn("Can't listen to data connection");
1537 char hname[NI_MAXHOST], sname[NI_MAXSERV];
1538 struct sockinet tmp;
1540 switch (data_addr.su_family) {
1542 if (!epsv4 || epsv4bad) {
1543 result = COMPLETE + 1;
1549 if (!epsv6 || epsv6bad) {
1550 result = COMPLETE + 1;
1554 af = (data_addr.su_family == AF_INET) ? 1 : 2;
1557 if (tmp.su_family == AF_INET6)
1558 tmp.si_su.su_sin6.sin6_scope_id = 0;
1560 if (getnameinfo((struct sockaddr *)&tmp.si_su,
1561 tmp.su_len, hname, sizeof(hname), sname,
1562 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) {
1568 result = command("EPRT |%u|%s|%s|", af, hname,
1572 (result == COMPLETE || !connected))
1573 fprintf(ttyout, "%s\n", reply_string);
1576 if (result != COMPLETE) {
1578 DPRINTF("disabling epsv4 for this "
1584 result = COMPLETE + 1;
1587 if (result == COMPLETE)
1590 switch (data_addr.su_family) {
1592 a = (char *)&data_addr.si_su.su_sin.sin_addr;
1593 p = (char *)&data_addr.su_port;
1594 result = command("PORT %d,%d,%d,%d,%d,%d",
1595 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
1596 UC(p[0]), UC(p[1]));
1600 uint8_t ua[sizeof(data_addr.si_su.su_sin6.sin6_addr)];
1601 uint8_t up[sizeof(data_addr.su_port)];
1603 memcpy(ua, &data_addr.si_su.su_sin6.sin6_addr,
1605 memcpy(up, &data_addr.su_port, sizeof(up));
1608 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
1610 ua[0], ua[1], ua[2], ua[3],
1611 ua[4], ua[5], ua[6], ua[7],
1612 ua[8], ua[9], ua[10], ua[11],
1613 ua[12], ua[13], ua[14], ua[15],
1620 result = COMPLETE + 1; /* xxx */
1626 if (result == ERROR && sendport == -1) {
1631 return (result != COMPLETE);
1635 #ifdef IPTOS_THROUGHPUT
1636 if (data_addr.su_family == AF_INET) {
1637 on = IPTOS_THROUGHPUT;
1638 if (setsockopt(data, IPPROTO_IP, IP_TOS,
1639 (void *)&on, sizeof(on)) == -1) {
1640 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
1654 dataconn(const char *lmode)
1656 struct sockinet from;
1657 int s, flags, rv, timeout;
1658 struct timeval endtime, now, td;
1659 struct pollfd pfd[1];
1662 if (passivemode) /* passive data connection */
1663 return (fdopen(data, lmode));
1665 /* active mode data connection */
1667 if ((flags = fcntl(data, F_GETFL, 0)) == -1)
1668 goto dataconn_failed; /* get current socket flags */
1669 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1)
1670 goto dataconn_failed; /* set non-blocking connect */
1672 /* NOTE: we now must restore socket flags on successful exit */
1674 /* limit time waiting on listening socket */
1676 pfd[0].events = POLLIN;
1677 (void)gettimeofday(&endtime, NULL); /* determine end time */
1678 endtime.tv_sec += (quit_time > 0) ? quit_time: 60;
1679 /* without -q, default to 60s */
1681 (void)gettimeofday(&now, NULL);
1682 timersub(&endtime, &now, &td);
1683 timeout = td.tv_sec * 1000 + td.tv_usec/1000;
1686 rv = ftp_poll(pfd, 1, timeout);
1687 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */
1689 warn("Can't poll waiting before accept");
1690 goto dataconn_failed;
1693 warnx("Poll timeout waiting before accept");
1694 goto dataconn_failed;
1697 /* (non-blocking) accept the connection */
1698 fromlen = myctladdr.su_len;
1700 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen);
1701 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */
1703 warn("Can't accept data connection");
1704 goto dataconn_failed;
1709 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */
1710 goto dataconn_failed;
1712 #ifdef IPTOS_THROUGHPUT
1713 if (from.su_family == AF_INET) {
1714 int tos = IPTOS_THROUGHPUT;
1715 if (setsockopt(s, IPPROTO_IP, IP_TOS,
1716 (void *)&tos, sizeof(tos)) == -1) {
1717 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
1721 return (fdopen(data, lmode));
1730 psabort(int notused)
1744 static struct comvars {
1746 char name[MAXHOSTNAMELEN];
1747 struct sockinet mctl;
1748 struct sockinet hctl;
1761 char mi[MAXPATHLEN];
1762 char mo[MAXPATHLEN];
1763 } proxstruct, tmpstruct;
1764 struct comvars *ip, *op;
1767 oldintr = xsignal(SIGINT, psabort);
1781 ip->connect = connected;
1782 connected = op->connect;
1784 (void)strlcpy(ip->name, hostname, sizeof(ip->name));
1787 hostname = op->name;
1788 ip->hctl = hisctladdr;
1789 hisctladdr = op->hctl;
1790 ip->mctl = myctladdr;
1791 myctladdr = op->mctl;
1798 ip->curtpe = curtype;
1799 curtype = op->curtpe;
1802 ip->sunqe = sunique;
1803 sunique = op->sunqe;
1804 ip->runqe = runique;
1805 runique = op->runqe;
1810 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti));
1811 (void)strlcpy(ntin, op->nti, sizeof(ntin));
1812 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto));
1813 (void)strlcpy(ntout, op->nto, sizeof(ntout));
1814 ip->mapflg = mapflag;
1815 mapflag = op->mapflg;
1816 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi));
1817 (void)strlcpy(mapin, op->mi, sizeof(mapin));
1818 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo));
1819 (void)strlcpy(mapout, op->mo, sizeof(mapout));
1820 (void)xsignal(SIGINT, oldintr);
1828 abortpt(int notused)
1834 write(fileno(ttyout), "\n", 1);
1838 siglongjmp(ptabort, 1);
1842 proxtrans(const char *cmd, const char *local, const char *remote)
1844 sigfunc volatile oldintr;
1845 int prox_type, nfnd;
1846 int volatile secndflag;
1847 const char *volatile cmd2;
1851 if (strcmp(cmd, "RETR"))
1854 cmd2 = runique ? "STOU" : "STOR";
1855 if ((prox_type = type) == 0) {
1856 if (unix_server && unix_proxy)
1861 if (curtype != prox_type)
1862 changetype(prox_type, 1);
1863 if (command("PASV") != COMPLETE) {
1864 fputs("proxy server does not support third party transfers.\n",
1870 fputs("No primary connection.\n", ttyout);
1875 if (curtype != prox_type)
1876 changetype(prox_type, 1);
1877 if (command("PORT %s", pasv) != COMPLETE) {
1881 if (sigsetjmp(ptabort, 1))
1883 oldintr = xsignal(SIGINT, abortpt);
1884 if ((restart_point &&
1885 (command("REST " LLF, (LLT) restart_point) != CONTINUE))
1886 || (command("%s %s", cmd, remote) != PRELIM)) {
1887 (void)xsignal(SIGINT, oldintr);
1894 if ((restart_point &&
1895 (command("REST " LLF, (LLT) restart_point) != CONTINUE))
1896 || (command("%s %s", cmd2, local) != PRELIM))
1902 (void)xsignal(SIGINT, oldintr);
1905 fprintf(ttyout, "local: %s remote: %s\n", local, remote);
1908 if (sigsetjmp(xferabort, 1)) {
1909 (void)xsignal(SIGINT, oldintr);
1912 (void)xsignal(SIGINT, abort_squared);
1914 if (strcmp(cmd, "RETR") && !proxy)
1916 else if (!strcmp(cmd, "RETR") && proxy)
1918 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */
1919 if (command("%s %s", cmd2, local) != PRELIM) {
1927 (void)xsignal(SIGINT, oldintr);
1933 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */
1934 if (command("%s %s", cmd2, local) != PRELIM) {
1941 (void)xsignal(SIGINT, oldintr);
1949 if ((nfnd = empty(cin, NULL, 10)) <= 0) {
1951 warn("Error aborting proxy command");
1964 (void)xsignal(SIGINT, oldintr);
1968 reset(int argc, char *argv[])
1972 if (argc == 0 && argv != NULL) {
1973 UPRINTF("usage: %s\n", argv[0]);
1978 if ((nfnd = empty(cin, NULL, 0)) < 0) {
1979 warn("Error resetting connection");
1988 gunique(const char *local)
1990 static char new[MAXPATHLEN];
1991 char *cp = strrchr(local, '/');
1992 int d, count=0, len;
1997 d = access(cp == local ? "/" : cp ? local : ".", W_OK);
2001 warn("Can't access `%s'", local);
2004 len = strlcpy(new, local, sizeof(new));
2008 if (++count == 100) {
2009 fputs("runique: can't find unique file name.\n",
2019 if ((d = access(new, F_OK)) < 0)
2023 else if (*(cp - 2) == '.')
2026 *(cp - 2) = *(cp - 2) + 1;
2035 * aborts abort_remote(). lostpeer() is called because if the user is
2036 * too impatient to wait or there's another problem then ftp really
2037 * needs to get back to a known state.
2040 abort_squared(int dummy)
2047 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n",
2049 write(fileno(ttyout), msgbuf, len);
2051 siglongjmp(xferabort, 1);
2055 abort_remote(FILE *din)
2061 warnx("Lost control connection for abort");
2068 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark
2069 * after urgent byte rather than before as is protocol now
2074 if (send(fileno(cout), buf, 3, MSG_OOB) != 3)
2075 warn("Can't send abort message");
2076 fprintf(cout, "%cABOR\r\n", DM);
2078 if ((nfnd = empty(cin, din, 10)) <= 0) {
2080 warn("Can't send abort message");
2085 if (din && (nfnd & 2)) {
2086 while (read(fileno(din), buf, BUFSIZ) > 0)
2089 if (getreply(0) == ERROR && code == 552) {
2090 /* 552 needed for nic style abort */
2097 * Ensure that ai->ai_addr is NOT an IPv4 mapped address.
2098 * IPv4 mapped address complicates too many things in FTP
2099 * protocol handling, as FTP protocol is defined differently
2100 * between IPv4 and IPv6.
2102 * This may not be the best way to handle this situation,
2103 * since the semantics of IPv4 mapped address is defined in
2104 * the kernel. There are configurations where we should use
2105 * IPv4 mapped address as native IPv6 address, not as
2106 * "an IPv6 address that embeds IPv4 address" (namely, SIIT).
2108 * More complete solution would be to have an additional
2109 * getsockopt to grab "real" peername/sockname. "real"
2110 * peername/sockname will be AF_INET if IPv4 mapped address
2111 * is used to embed IPv4 address, and will be AF_INET6 if
2112 * we use it as native. What a mess!
2115 ai_unmapped(struct addrinfo *ai)
2118 struct sockaddr_in6 *sin6;
2119 struct sockaddr_in sin;
2122 if (ai->ai_family != AF_INET6)
2124 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) ||
2125 sizeof(sin) > ai->ai_addrlen)
2127 sin6 = (struct sockaddr_in6 *)ai->ai_addr;
2128 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
2131 memset(&sin, 0, sizeof(sin));
2132 sin.sin_family = AF_INET;
2133 len = sizeof(struct sockaddr_in);
2134 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
2135 sizeof(sin.sin_addr));
2136 sin.sin_port = sin6->sin6_port;
2138 ai->ai_family = AF_INET;
2139 #if defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
2142 memcpy(ai->ai_addr, &sin, len);
2143 ai->ai_addrlen = len;
2151 fputs("Usage error\n", ttyout);