/* $NetBSD: ftp.c,v 1.78 1999/10/05 13:05:41 lukem Exp $ */ /*- * Copyright (c) 1996-1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Luke Mewburn. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1985, 1989, 1993, 1994 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Copyright (C) 1997 and 1998 WIDE Project. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #ifndef lint #if 0 static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94"; #else __RCSID("$NetBSD: ftp.c,v 1.78 1999/10/05 13:05:41 lukem Exp $"); #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef __STDC__ #include #else #include #endif #ifndef __USE_SELECT #include #endif #include "ftp_var.h" volatile int abrtflag = 0; volatile int timeoutflag = 0; jmp_buf ptabort; int ptabflg; int ptflag = 0; char pasv[BUFSIZ]; /* passive port for proxy data connection */ static int empty __P((FILE *, FILE *, int)); union sockunion { struct sockinet { #ifdef BSD4_4 u_char si_len; u_char si_family; #else u_short si_family; #endif u_short si_port; #ifndef BSD4_4 u_char si_pad[ #ifdef INET6 sizeof(struct sockaddr_in6) #else sizeof(struct sockaddr_in) #endif - sizeof(u_int)]; u_char si_len; #endif } su_si; struct sockaddr_in su_sin; #ifdef INET6 struct sockaddr_in6 su_sin6; #endif }; #define su_len su_si.si_len #define su_family su_si.si_family #define su_port su_si.si_port union sockunion myctladdr, hisctladdr, data_addr; char * hookup(host, port) char *host; char *port; { int s = -1, len, error; #ifdef NI_NUMERICHOST struct addrinfo hints, *res, *res0; char hbuf[MAXHOSTNAMELEN]; #else struct hostent *hp = NULL; struct servent *sp = NULL; char **ptr; struct sockaddr_in sin; #endif static char hostnamebuf[MAXHOSTNAMELEN]; char *cause = "unknown"; int family; #ifdef NI_NUMERICHOST memset((char *)&hisctladdr, 0, sizeof (hisctladdr)); memset(&hints, 0, sizeof(hints)); hints.ai_flags = AI_CANONNAME; hints.ai_family = AF_UNSPEC; hints.ai_socktype = SOCK_STREAM; hints.ai_protocol = 0; error = getaddrinfo(host, port, &hints, &res0); if (error) { warnx(gai_strerror(error)); code = -1; return (0); } if (res0->ai_canonname) (void)strlcpy(hostnamebuf, res0->ai_canonname, sizeof(hostnamebuf)); else (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf)); hostname = hostnamebuf; for (res = res0; res; res = res->ai_next) { #if 0 /*old behavior*/ if (res != res0) /* not on the first address */ #else if (res0->ai_next) /* if we have multiple possibilities */ #endif { getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST); fprintf(ttyout, "Trying %s...\n", hbuf); } s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); if (s < 0) { cause = "socket"; continue; } while ((error = xconnect(s, res->ai_addr, res->ai_addrlen)) < 0 && errno == EINTR) { ; } if (error) { /* this "if" clause is to prevent print warning twice */ if (res->ai_next) { getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST); warn("connect to address %s", hbuf); } cause = "connect"; close(s); s = -1; continue; } /* finally we got one */ break; } if (s < 0) { warn(cause); code = -1; freeaddrinfo(res0); return 0; } memcpy(&hisctladdr, res->ai_addr, res->ai_addrlen); len = res->ai_addrlen; freeaddrinfo(res0); res0 = res = NULL; family = hisctladdr.su_family; #else memset(&sin, 0, sizeof(sin)); sin.sin_family = AF_INET; if ((hp = gethostbyname(host)) == NULL) { warnx("%s: %s", host, hstrerror(h_errno)); code = -1; return 0; } if ((sp = getservbyname(port, "tcp")) == NULL) { sin.sin_port = htons(21); } else sin.sin_port = sp->s_port; (void)strlcpy(hostnamebuf, hp->h_name, sizeof(hostnamebuf)); hostname = hostnamebuf; if (hp->h_length > sizeof(sin.sin_addr)) hp->h_length = sizeof(sin.sin_addr); for (ptr = hp->h_addr_list; *ptr; ptr++) { memcpy(&sin.sin_addr, *ptr, (size_t)hp->h_length); if (hp->h_addr_list[1]) fprintf(ttyout, "Trying %s...\n", inet_ntoa(sin.sin_addr)); s = socket(AF_INET, SOCK_STREAM, 0); if (s < 0) { cause = "socket"; continue; } while ((error = xconnect(s, (struct sockaddr *)&sin, sizeof(sin))) < 0 && errno == EINTR) { ; } if (error) { /* this "if" clause is to prevent print warning twice */ if (hp->h_addr_list[1]) { warn("connect to address %s", inet_ntoa(sin.sin_addr)); } cause = "connect"; close(s); s = -1; continue; } /* finally we got one */ break; } if (s < 0) { warn(cause); code = -1; return 0; } memcpy(&hisctladdr, &sin, sizeof(sin)); len = sizeof(sin); if (hisctladdr.su_len == 0) hisctladdr.su_len = len; family = AF_INET; #endif if (getsockname(s, (struct sockaddr *)&myctladdr, &len) < 0) { warn("getsockname"); code = -1; goto bad; } if (myctladdr.su_len == 0) myctladdr.su_len = len; #if defined(IPPROTO_IP) && defined(IP_TOS) if (family == AF_INET) { int tos = IPTOS_LOWDELAY; if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, sizeof(int)) < 0) warn("setsockopt TOS (ignored)"); } #endif cin = fdopen(s, "r"); cout = fdopen(s, "w"); if (cin == NULL || cout == NULL) { warnx("fdopen failed."); if (cin) (void)fclose(cin); if (cout) (void)fclose(cout); code = -1; goto bad; } if (verbose) fprintf(ttyout, "Connected to %s.\n", hostname); if (getreply(0) > 2) { /* read startup message from server */ if (cin) (void)fclose(cin); if (cout) (void)fclose(cout); code = -1; goto bad; } #ifdef SO_OOBINLINE { int on = 1; if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on)) < 0 && debug) { warn("setsockopt"); } } #endif /* SO_OOBINLINE */ return (hostname); bad: (void)close(s); return (NULL); } void cmdabort(notused) int notused; { alarmtimer(0); putc('\n', ttyout); abrtflag++; if (ptflag) longjmp(ptabort, 1); } void cmdtimeout(notused) int notused; { alarmtimer(0); putc('\n', ttyout); (void)fflush(ttyout); timeoutflag++; if (ptflag) longjmp(ptabort, 1); } /*VARARGS*/ int #ifdef __STDC__ command(const char *fmt, ...) #else command(va_alist) va_dcl #endif { va_list ap; int r; sig_t oldsigint; #ifndef __STDC__ const char *fmt; #endif if (debug) { fputs("---> ", ttyout); #ifdef __STDC__ va_start(ap, fmt); #else va_start(ap); fmt = va_arg(ap, const char *); #endif if (strncmp("PASS ", fmt, 5) == 0) fputs("PASS XXXX", ttyout); else if (strncmp("ACCT ", fmt, 5) == 0) fputs("ACCT XXXX", ttyout); else vfprintf(ttyout, fmt, ap); va_end(ap); putc('\n', ttyout); } if (cout == NULL) { warnx("No control connection for command."); code = -1; return (0); } abrtflag = 0; oldsigint = xsignal(SIGINT, cmdabort); #ifdef __STDC__ va_start(ap, fmt); #else va_start(ap); fmt = va_arg(ap, char *); #endif vfprintf(cout, fmt, ap); va_end(ap); fputs("\r\n", cout); (void)fflush(cout); cpend = 1; r = getreply(!strcmp(fmt, "QUIT")); if (abrtflag && oldsigint != SIG_IGN) (*oldsigint)(SIGINT); (void)xsignal(SIGINT, oldsigint); return (r); } int getreply(expecteof) int expecteof; { char current_line[BUFSIZ]; /* last line of previous reply */ int c, n, line; int dig; int originalcode = 0, continuation = 0; sig_t oldsigint, oldsigalrm; int pflag = 0; char *cp, *pt = pasv; abrtflag = 0; timeoutflag = 0; oldsigint = xsignal(SIGINT, cmdabort); oldsigalrm = xsignal(SIGALRM, cmdtimeout); for (line = 0 ;; line++) { dig = n = code = 0; cp = current_line; while (alarmtimer(60),((c = getc(cin)) != '\n')) { if (c == IAC) { /* handle telnet commands */ switch (c = getc(cin)) { case WILL: case WONT: c = getc(cin); fprintf(cout, "%c%c%c", IAC, DONT, c); (void)fflush(cout); break; case DO: case DONT: c = getc(cin); fprintf(cout, "%c%c%c", IAC, WONT, c); (void)fflush(cout); break; default: break; } continue; } dig++; if (c == EOF) { /* * these will get trashed by pswitch() * in lostpeer() */ int reply_timeoutflag = timeoutflag; int reply_abrtflag = abrtflag; if (expecteof) { alarmtimer(0); (void)xsignal(SIGINT, oldsigint); (void)xsignal(SIGALRM, oldsigalrm); code = 221; return (0); } lostpeer(); if (verbose) { if (reply_timeoutflag) fputs( "421 Service not available, remote server timed out.\n", ttyout); else if (reply_abrtflag) fputs( "421 Service not available, user interrupt.\n", ttyout); else fputs( "421 Service not available, remote server has closed connection.\n", ttyout); (void)fflush(ttyout); } code = 421; /* the lostpeer() above calls alarmtimer(0); */ (void)xsignal(SIGINT, oldsigint); (void)xsignal(SIGALRM, oldsigalrm); return (4); } if (c != '\r' && (verbose > 0 || ((verbose > -1 && n == '5' && dig > 4) && (((!n && c < '5') || (n && n < '5')) || !retry_connect)))) { if (proxflag && (dig == 1 || (dig == 5 && verbose == 0))) fprintf(ttyout, "%s:", hostname); (void)putc(c, ttyout); } if (dig < 4 && isdigit(c)) code = code * 10 + (c - '0'); if (!pflag && (code == 227 || code == 228)) pflag = 1; else if (!pflag && code == 229) pflag = 100; if (dig > 4 && pflag == 1 && isdigit(c)) pflag = 2; if (pflag == 2) { if (c != '\r' && c != ')') *pt++ = c; else { *pt = '\0'; pflag = 3; } } if (pflag == 100 && c == '(') pflag = 2; if (dig == 4 && c == '-') { if (continuation) code = 0; continuation++; } if (n == 0) n = c; if (cp < ¤t_line[sizeof(current_line) - 1]) *cp++ = c; } if (verbose > 0 || ((verbose > -1 && n == '5') && (n < '5' || !retry_connect))) { (void)putc(c, ttyout); (void)fflush (ttyout); } if (line == 0) { size_t len = cp - current_line; if (len > sizeof(reply_string)) len = sizeof(reply_string); (void)strlcpy(reply_string, current_line, len); } if (continuation && code != originalcode) { if (originalcode == 0) originalcode = code; continue; } *cp = '\0'; if (n != '1') cpend = 0; alarm(0); (void)xsignal(SIGINT, oldsigint); (void)xsignal(SIGALRM, oldsigalrm); if (code == 421 || originalcode == 421) lostpeer(); if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN) (*oldsigint)(SIGINT); if (timeoutflag && oldsigalrm != cmdtimeout && oldsigalrm != SIG_IGN) (*oldsigalrm)(SIGINT); return (n - '0'); } } static int empty(cin, din, sec) FILE *cin; FILE *din; int sec; { int nr; int nfd = 0; #ifdef __USE_SELECT struct timeval t; fd_set rmask; FD_ZERO(&rmask); if (cin) { if (nfd < fileno(cin)) nfd = fileno(cin); FD_SET(fileno(cin), &rmask); } if (din) { if (nfd < fileno(din)) nfd = fileno(din); FD_SET(fileno(din), &rmask); } t.tv_sec = (long) sec; t.tv_usec = 0; if ((nr = select(nfd, &rmask, NULL, NULL, &t)) <= 0) return nr; nr = 0; if (cin) nr |= FD_ISSET(fileno(cin), &rmask) ? 1 : 0; if (din) nr |= FD_ISSET(fileno(din), &rmask) ? 2 : 0; #else struct pollfd pfd[2]; if (cin) { pfd[nfd].fd = fileno(cin); pfd[nfd++].events = POLLIN; } if (din) { pfd[nfd].fd = fileno(din); pfd[nfd++].events = POLLIN; } if ((nr = poll(pfd, nfd, sec * 1000)) <= 0) return nr; nr = 0; nfd = 0; if (cin) nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0; if (din) nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0; #endif return nr; } jmp_buf sendabort; void abortsend(notused) int notused; { alarmtimer(0); mflag = 0; abrtflag = 0; fputs("\nsend aborted\nwaiting for remote to finish abort.\n", ttyout); longjmp(sendabort, 1); } void sendrequest(cmd, local, remote, printnames) const char *cmd, *local, *remote; int printnames; { struct stat st; int c, d; FILE *fin, *dout; int (*closefunc) __P((FILE *)); sig_t oldintr, oldintp; volatile off_t hashbytes; char *lmode, *bufp; static size_t bufsize; static char *buf; int oprogress; #ifdef __GNUC__ /* to shut up gcc warnings */ (void)&fin; (void)&dout; (void)&closefunc; (void)&oldintr; (void)&oldintp; (void)&lmode; #endif hashbytes = mark; direction = "sent"; dout = NULL; bytes = 0; filesize = -1; oprogress = progress; if (verbose && printnames) { if (local && *local != '-') fprintf(ttyout, "local: %s ", local); if (remote) fprintf(ttyout, "remote: %s\n", remote); } if (proxy) { proxtrans(cmd, local, remote); return; } if (curtype != type) changetype(type, 0); closefunc = NULL; oldintr = NULL; oldintp = NULL; lmode = "w"; if (setjmp(sendabort)) { while (cpend) { (void)getreply(0); } goto cleanupsend; } oldintr = xsignal(SIGINT, abortsend); if (strcmp(local, "-") == 0) { fin = stdin; progress = 0; } else if (*local == '|') { oldintp = xsignal(SIGPIPE, SIG_IGN); fin = popen(local + 1, "r"); if (fin == NULL) { warn("%s", local + 1); goto cleanupsend; } progress = 0; closefunc = pclose; } else { fin = fopen(local, "r"); if (fin == NULL) { warn("local: %s", local); goto cleanupsend; } closefunc = fclose; if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) { fprintf(ttyout, "%s: not a plain file.\n", local); goto cleanupsend; } filesize = st.st_size; } if (initconn()) { goto cleanupsend; } if (setjmp(sendabort)) goto abort; if (restart_point && (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) { int rc; rc = -1; switch (curtype) { case TYPE_A: rc = fseek(fin, (long) restart_point, SEEK_SET); break; case TYPE_I: case TYPE_L: rc = lseek(fileno(fin), restart_point, SEEK_SET); break; } if (rc < 0) { warn("local: %s", local); goto cleanupsend; } #ifndef NO_QUAD if (command("REST %lld", (long long) restart_point) != #else if (command("REST %ld", (long) restart_point) != #endif CONTINUE) { goto cleanupsend; } lmode = "r+w"; } if (remote) { if (command("%s %s", cmd, remote) != PRELIM) { goto cleanupsend; } } else if (command("%s", cmd) != PRELIM) { goto cleanupsend; } dout = dataconn(lmode); if (dout == NULL) goto abort; if (sndbuf_size > bufsize) { if (buf) (void)free(buf); bufsize = sndbuf_size; buf = xmalloc(bufsize); } progressmeter(-1); oldintp = xsignal(SIGPIPE, SIG_IGN); switch (curtype) { case TYPE_I: case TYPE_L: while (1) { struct timeval then, now, td; off_t bufrem; if (rate_put) (void)gettimeofday(&then, NULL); errno = c = d = 0; bufrem = rate_put ? rate_put : bufsize; while (bufrem > 0) { if ((c = read(fileno(fin), buf, MIN(bufsize, bufrem))) <= 0) goto senddone; bytes += c; bufrem -= c; for (bufp = buf; c > 0; c -= d, bufp += d) if ((d = write(fileno(dout), bufp, c)) <= 0) break; if (d < 0) goto senddone; if (hash && (!progress || filesize < 0) ) { while (bytes >= hashbytes) { (void)putc('#', ttyout); hashbytes += mark; } (void)fflush(ttyout); } } if (rate_put) { while (1) { (void)gettimeofday(&now, NULL); timersub(&now, &then, &td); if (td.tv_sec > 0) break; usleep(1000000 - td.tv_usec); } } } senddone: if (hash && (!progress || filesize < 0) && bytes > 0) { if (bytes < mark) (void)putc('#', ttyout); (void)putc('\n', ttyout); } if (c < 0) warn("local: %s", local); if (d < 0) { if (errno != EPIPE) warn("netout"); bytes = -1; } break; case TYPE_A: while ((c = getc(fin)) != EOF) { if (c == '\n') { while (hash && (!progress || filesize < 0) && (bytes >= hashbytes)) { (void)putc('#', ttyout); (void)fflush(ttyout); hashbytes += mark; } if (ferror(dout)) break; (void)putc('\r', dout); bytes++; } (void)putc(c, dout); bytes++; #if 0 /* this violates RFC */ if (c == '\r') { (void)putc('\0', dout); bytes++; } #endif } if (hash && (!progress || filesize < 0)) { if (bytes < hashbytes) (void)putc('#', ttyout); (void)putc('\n', ttyout); } if (ferror(fin)) warn("local: %s", local); if (ferror(dout)) { if (errno != EPIPE) warn("netout"); bytes = -1; } break; } progressmeter(1); if (closefunc != NULL) { (*closefunc)(fin); fin = NULL; } (void)getreply(0); if (bytes > 0) ptransfer(0); goto cleanupsend; abort: if (!cpend) { goto cleanupsend; } (void)getreply(0); if (bytes > 0) ptransfer(0); cleanupsend: if (oldintp) (void)xsignal(SIGPIPE, oldintp); if (oldintr) (void)xsignal(SIGINT, oldintr); if (closefunc != NULL && fin != NULL) (*closefunc)(fin); if (dout) (void)fclose(dout); if (data >= 0) { (void)close(data); data = -1; } code = -1; progress = oprogress; restart_point = 0; bytes = 0; } jmp_buf recvabort; void abortrecv(notused) int notused; { alarmtimer(0); mflag = 0; abrtflag = 0; fputs("\nreceive aborted\nwaiting for remote to finish abort.\n", ttyout); longjmp(recvabort, 1); } void recvrequest(cmd, local, remote, lmode, printnames, ignorespecial) const char *cmd, *local, *remote, *lmode; int printnames, ignorespecial; { FILE *fout, *din; int (*closefunc) __P((FILE *)); sig_t oldintr, oldintp; int c, d; volatile int is_retr, tcrflag, bare_lfs; static size_t bufsize; static char *buf; volatile off_t hashbytes; struct stat st; time_t mtime; struct timeval tval[2]; int oprogress; int opreserve; #ifdef __GNUC__ /* to shut up gcc warnings */ (void)&local; (void)&fout; (void)&din; (void)&closefunc; (void)&oldintr; (void)&oldintp; #endif fout = NULL; din = NULL; hashbytes = mark; direction = "received"; bytes = 0; bare_lfs = 0; filesize = -1; oprogress = progress; opreserve = preserve; is_retr = (strcmp(cmd, "RETR") == 0); if (is_retr && verbose && printnames) { if (local && (ignorespecial || *local != '-')) fprintf(ttyout, "local: %s ", local); if (remote) fprintf(ttyout, "remote: %s\n", remote); } if (proxy && is_retr) { proxtrans(cmd, local, remote); return; } closefunc = NULL; oldintr = NULL; oldintp = NULL; tcrflag = !crflag && is_retr; if (setjmp(recvabort)) { while (cpend) { (void)getreply(0); } goto cleanuprecv; } oldintr = xsignal(SIGINT, abortrecv); if (ignorespecial || (strcmp(local, "-") && *local != '|')) { if (access(local, W_OK) < 0) { char *dir = strrchr(local, '/'); if (errno != ENOENT && errno != EACCES) { warn("local: %s", local); goto cleanuprecv; } if (dir != NULL) *dir = 0; d = access(dir == local ? "/" : dir ? local : ".", W_OK); if (dir != NULL) *dir = '/'; if (d < 0) { warn("local: %s", local); goto cleanuprecv; } if (!runique && errno == EACCES && chmod(local, (S_IRUSR|S_IWUSR)) < 0) { warn("local: %s", local); goto cleanuprecv; } if (runique && errno == EACCES && (local = gunique(local)) == NULL) { goto cleanuprecv; } } else if (runique && (local = gunique(local)) == NULL) { goto cleanuprecv; } } if (!is_retr) { if (curtype != TYPE_A) changetype(TYPE_A, 0); } else { if (curtype != type) changetype(type, 0); filesize = remotesize(remote, 0); } if (initconn()) { goto cleanuprecv; } if (setjmp(recvabort)) goto abort; if (is_retr && restart_point && #ifndef NO_QUAD command("REST %lld", (long long) restart_point) != CONTINUE) #else command("REST %ld", (long) restart_point) != CONTINUE) #endif goto cleanuprecv; if (remote) { if (command("%s %s", cmd, remote) != PRELIM) { goto cleanuprecv; } } else { if (command("%s", cmd) != PRELIM) { goto cleanuprecv; } } din = dataconn("r"); if (din == NULL) goto abort; if (!ignorespecial && strcmp(local, "-") == 0) { fout = stdout; progress = 0; preserve = 0; } else if (!ignorespecial && *local == '|') { oldintp = xsignal(SIGPIPE, SIG_IGN); fout = popen(local + 1, "w"); if (fout == NULL) { warn("%s", local+1); goto abort; } progress = 0; preserve = 0; closefunc = pclose; } else { fout = fopen(local, lmode); if (fout == NULL) { warn("local: %s", local); goto abort; } closefunc = fclose; } if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) { progress = 0; preserve = 0; } if (rcvbuf_size > bufsize) { if (buf) (void)free(buf); bufsize = rcvbuf_size; buf = xmalloc(bufsize); } progressmeter(-1); switch (curtype) { case TYPE_I: case TYPE_L: if (is_retr && restart_point && lseek(fileno(fout), restart_point, SEEK_SET) < 0) { warn("local: %s", local); goto cleanuprecv; } while (1) { struct timeval then, now, td; off_t bufrem; if (rate_get) (void)gettimeofday(&then, NULL); errno = c = d = 0; bufrem = rate_get ? rate_get : bufsize; while (bufrem > 0) { if ((c = read(fileno(din), buf, MIN(bufsize, bufrem))) <= 0) goto recvdone; bytes += c; bufrem -=c; if ((d = write(fileno(fout), buf, c)) != c) goto recvdone; if (hash && (!progress || filesize < 0)) { while (bytes >= hashbytes) { (void)putc('#', ttyout); hashbytes += mark; } (void)fflush(ttyout); } } if (rate_get) { while (1) { (void)gettimeofday(&now, NULL); timersub(&now, &then, &td); if (td.tv_sec > 0) break; usleep(1000000 - td.tv_usec); } } } recvdone: if (hash && (!progress || filesize < 0) && bytes > 0) { if (bytes < mark) (void)putc('#', ttyout); (void)putc('\n', ttyout); } if (c < 0) { if (errno != EPIPE) warn("netin"); bytes = -1; } if (d < c) { if (d < 0) warn("local: %s", local); else warnx("%s: short write", local); } break; case TYPE_A: if (is_retr && restart_point) { int ch; long i, n; if (fseek(fout, 0L, SEEK_SET) < 0) goto done; n = (long)restart_point; for (i = 0; i++ < n;) { if ((ch = getc(fout)) == EOF) goto done; if (ch == '\n') i++; } if (fseek(fout, 0L, SEEK_CUR) < 0) { done: warn("local: %s", local); goto cleanuprecv; } } while ((c = getc(din)) != EOF) { if (c == '\n') bare_lfs++; while (c == '\r') { while (hash && (!progress || filesize < 0) && (bytes >= hashbytes)) { (void)putc('#', ttyout); (void)fflush(ttyout); hashbytes += mark; } bytes++; if ((c = getc(din)) != '\n' || tcrflag) { if (ferror(fout)) goto break2; (void)putc('\r', fout); if (c == '\0') { bytes++; goto contin2; } if (c == EOF) goto contin2; } } (void)putc(c, fout); bytes++; contin2: ; } break2: if (hash && (!progress || filesize < 0)) { if (bytes < hashbytes) (void)putc('#', ttyout); (void)putc('\n', ttyout); } if (ferror(din)) { if (errno != EPIPE) warn("netin"); bytes = -1; } if (ferror(fout)) warn("local: %s", local); break; } progressmeter(1); if (closefunc != NULL) { (*closefunc)(fout); fout = NULL; } (void)getreply(0); if (bare_lfs) { fprintf(ttyout, "WARNING! %d bare linefeeds received in ASCII mode.\n", bare_lfs); fputs("File may not have transferred correctly.\n", ttyout); } if (bytes >= 0 && is_retr) { if (bytes > 0) ptransfer(0); if (preserve && (closefunc == fclose)) { mtime = remotemodtime(remote, 0); if (mtime != -1) { (void)gettimeofday(&tval[0], NULL); tval[1].tv_sec = mtime; tval[1].tv_usec = 0; if (utimes(local, tval) == -1) { fprintf(ttyout, "Can't change modification time on %s to %s", local, asctime(localtime(&mtime))); } } } } goto cleanuprecv; abort: /* * abort using RFC 959 recommended IP,SYNC sequence */ (void)xsignal(SIGINT, SIG_IGN); if (!cpend) { goto cleanuprecv; } abort_remote(din); if (bytes > 0) ptransfer(0); cleanuprecv: if (oldintp) (void)xsignal(SIGPIPE, oldintp); if (oldintr) (void)xsignal(SIGINT, oldintr); if (closefunc != NULL && fout != NULL) (*closefunc)(fout); if (din) (void)fclose(din); if (data >= 0) { (void)close(data); data = -1; } code = -1; progress = oprogress; preserve = opreserve; bytes = 0; } /* * Need to start a listen on the data channel before we send the command, * otherwise the server's connect may fail. */ int initconn() { char *p, *a; int result, len, tmpno = 0; int on = 1; int error; u_int addr[16], port[2]; u_int af, hal, pal; char *pasvcmd = NULL; #ifdef INET6 if (myctladdr.su_family == AF_INET6 && (IN6_IS_ADDR_LINKLOCAL(&myctladdr.su_sin6.sin6_addr) || IN6_IS_ADDR_SITELOCAL(&myctladdr.su_sin6.sin6_addr))) { warnx("use of scoped address can be troublesome"); } #endif reinit: if (passivemode) { data_addr = myctladdr; data = socket(data_addr.su_family, SOCK_STREAM, 0); if (data < 0) { warn("socket"); return (1); } if ((options & SO_DEBUG) && setsockopt(data, SOL_SOCKET, SO_DEBUG, (char *)&on, sizeof(on)) < 0) warn("setsockopt (ignored)"); result = COMPLETE + 1; switch (data_addr.su_family) { case AF_INET: if (epsv4 && !epsv4bad) { result = command(pasvcmd = "EPSV"); /* * this code is to be friendly with broken * BSDI ftpd */ if (code / 10 == 22 && code != 229) { fputs( "wrong server: return code must be 229\n", ttyout); result = COMPLETE + 1; } if (result != COMPLETE) { epsv4bad = 1; if (debug) fputs( "disabling epsv4 for this connection\n", ttyout); } } if (result != COMPLETE) result = command(pasvcmd = "PASV"); break; #ifdef INET6 case AF_INET6: result = command(pasvcmd = "EPSV"); /* this code is to be friendly with broken BSDI ftpd */ if (code / 10 == 22 && code != 229) { fputs( "wrong server: return code must be 229\n", ttyout); result = COMPLETE + 1; } if (result != COMPLETE) result = command(pasvcmd = "LPSV"); break; #endif default: result = COMPLETE + 1; break; } if (result != COMPLETE) { if (activefallback) { (void)close(data); data = -1; passivemode = 0; activefallback = 0; goto reinit; } fputs("Passive mode refused.\n", ttyout); goto bad; } #define pack2(var, off) \ (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0)) #define pack4(var, off) \ (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \ ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0)) /* * What we've got at this point is a string of comma separated * one-byte unsigned integer values, separated by commas. */ if (strcmp(pasvcmd, "PASV") == 0) { if (data_addr.su_family != AF_INET) { fputs( "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); error = 1; goto bad; } if (code / 10 == 22 && code != 227) { fputs("wrong server: return code must be 227\n", ttyout); error = 1; goto bad; } error = sscanf(pasv, "%u,%u,%u,%u,%u,%u", &addr[0], &addr[1], &addr[2], &addr[3], &port[0], &port[1]); if (error != 6) { fputs( "Passive mode address scan failure. Shouldn't happen!\n", ttyout); error = 1; goto bad; } error = 0; memset(&data_addr, 0, sizeof(data_addr)); data_addr.su_family = AF_INET; data_addr.su_len = sizeof(struct sockaddr_in); data_addr.su_sin.sin_addr.s_addr = htonl(pack4(addr, 0)); data_addr.su_port = htons(pack2(port, 0)); } else if (strcmp(pasvcmd, "LPSV") == 0) { if (code / 10 == 22 && code != 228) { fputs("wrong server: return code must be 228\n", ttyout); error = 1; goto bad; } switch (data_addr.su_family) { case AF_INET: error = sscanf(pasv, "%u,%u,%u,%u,%u,%u,%u,%u,%u", &af, &hal, &addr[0], &addr[1], &addr[2], &addr[3], &pal, &port[0], &port[1]); if (error != 9) { fputs( "Passive mode address scan failure. Shouldn't happen!\n", ttyout); error = 1; goto bad; } if (af != 4 || hal != 4 || pal != 2) { fputs( "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); error = 1; goto bad; } error = 0; memset(&data_addr, 0, sizeof(data_addr)); data_addr.su_family = AF_INET; data_addr.su_len = sizeof(struct sockaddr_in); data_addr.su_sin.sin_addr.s_addr = htonl(pack4(addr, 0)); data_addr.su_port = htons(pack2(port, 0)); break; #ifdef INET6 case AF_INET6: error = sscanf(pasv, "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u", &af, &hal, &addr[0], &addr[1], &addr[2], &addr[3], &addr[4], &addr[5], &addr[6], &addr[7], &addr[8], &addr[9], &addr[10], &addr[11], &addr[12], &addr[13], &addr[14], &addr[15], &pal, &port[0], &port[1]); if (error != 21) { fputs( "Passive mode address scan failure. Shouldn't happen!\n", ttyout); error = 1; goto bad; } if (af != 6 || hal != 16 || pal != 2) { fputs( "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); error = 1; goto bad; } error = 0; memset(&data_addr, 0, sizeof(data_addr)); data_addr.su_family = AF_INET6; data_addr.su_len = sizeof(struct sockaddr_in6); { u_int32_t *p32; p32 = (u_int32_t *)&data_addr.su_sin6.sin6_addr; p32[0] = htonl(pack4(addr, 0)); p32[1] = htonl(pack4(addr, 4)); p32[2] = htonl(pack4(addr, 8)); p32[3] = htonl(pack4(addr, 12)); } data_addr.su_port = htons(pack2(port, 0)); break; #endif default: error = 1; } } else if (strcmp(pasvcmd, "EPSV") == 0) { char delim[4]; port[0] = 0; if (code / 10 == 22 && code != 229) { fputs("wrong server: return code must be 229\n", ttyout); error = 1; goto bad; } if (sscanf(pasv, "%c%c%c%d%c", &delim[0], &delim[1], &delim[2], &port[1], &delim[3]) != 5) { fputs("parse error!\n", ttyout); error = 1; goto bad; } if (delim[0] != delim[1] || delim[0] != delim[2] || delim[0] != delim[3]) { fputs("parse error!\n", ttyout); error = 1; goto bad; } data_addr = hisctladdr; data_addr.su_port = htons(port[1]); } else goto bad; while (xconnect(data, (struct sockaddr *)&data_addr, data_addr.su_len) < 0) { if (errno == EINTR) continue; if (activefallback) { (void)close(data); data = -1; passivemode = 0; activefallback = 0; goto reinit; } warn("connect"); goto bad; } #if defined(IPPROTO_IP) && defined(IP_TOS) if (data_addr.su_family == AF_INET) { on = IPTOS_THROUGHPUT; if (setsockopt(data, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)) < 0) warn("setsockopt TOS (ignored)"); } #endif return (0); } noport: data_addr = myctladdr; if (sendport) data_addr.su_port = 0; /* let system pick one */ if (data != -1) (void)close(data); data = socket(data_addr.su_family, SOCK_STREAM, 0); if (data < 0) { warn("socket"); if (tmpno) sendport = 1; return (1); } if (!sendport) if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) { warn("setsockopt (reuse address)"); goto bad; } if (bind(data, (struct sockaddr *)&data_addr, data_addr.su_len) < 0) { warn("bind"); goto bad; } if (options & SO_DEBUG && setsockopt(data, SOL_SOCKET, SO_DEBUG, (char *)&on, sizeof(on)) < 0) warn("setsockopt (ignored)"); len = sizeof(data_addr); if (getsockname(data, (struct sockaddr *)&data_addr, &len) < 0) { warn("getsockname"); goto bad; } if (xlisten(data, 1) < 0) warn("listen"); #define UC(b) (((int)b)&0xff) if (sendport) { #ifdef INET6 char hname[INET6_ADDRSTRLEN]; int af; #endif switch (data_addr.su_family) { case AF_INET: if (!epsv4 || epsv4bad) { result = COMPLETE + 1; break; } /* FALLTHROUGH */ #ifdef INET6 case AF_INET6: af = (data_addr.su_family == AF_INET) ? 1 : 2; if (getnameinfo((struct sockaddr *)&data_addr, data_addr.su_len, hname, sizeof(hname), NULL, 0, NI_NUMERICHOST)) { result = ERROR; } else { result = command("EPRT |%d|%s|%d|", af, hname, ntohs(data_addr.su_port)); if (result != COMPLETE) { epsv4bad = 1; if (debug) fputs( "disabling epsv4 for this connection\n", ttyout); } } break; #endif default: result = COMPLETE + 1; break; } if (result == COMPLETE) goto skip_port; switch (data_addr.su_family) { case AF_INET: a = (char *)&data_addr.su_sin.sin_addr; p = (char *)&data_addr.su_port; result = command("PORT %d,%d,%d,%d,%d,%d", UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1])); break; #ifdef INET6 case AF_INET6: a = (char *)&data_addr.su_sin6.sin6_addr; p = (char *)&data_addr.su_port; result = command( "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", 6, 16, UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]), UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]), UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]), UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]), 2, UC(p[0]), UC(p[1])); break; #endif default: result = COMPLETE + 1; /* xxx */ } skip_port: if (result == ERROR && sendport == -1) { sendport = 0; tmpno = 1; goto noport; } return (result != COMPLETE); } if (tmpno) sendport = 1; #if defined(IPPROTO_IP) && defined(IP_TOS) if (data_addr.su_family == AF_INET) { on = IPTOS_THROUGHPUT; if (setsockopt(data, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)) < 0) warn("setsockopt TOS (ignored)"); } #endif return (0); bad: (void)close(data), data = -1; if (tmpno) sendport = 1; return (1); } FILE * dataconn(lmode) const char *lmode; { union sockunion from; int s, fromlen = myctladdr.su_len; if (passivemode) return (fdopen(data, lmode)); s = accept(data, (struct sockaddr *) &from, &fromlen); if (s < 0) { warn("accept"); (void)close(data), data = -1; return (NULL); } (void)close(data); data = s; #if defined(IPPROTO_IP) && defined(IP_TOS) if (from.su_family == AF_INET) { int tos = IPTOS_THROUGHPUT; if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, sizeof(int)) < 0) { warn("setsockopt TOS (ignored)"); } } #endif return (fdopen(data, lmode)); } void psabort(notused) int notused; { alarmtimer(0); abrtflag++; } void pswitch(flag) int flag; { sig_t oldintr; static struct comvars { int connect; char name[MAXHOSTNAMELEN]; union sockunion mctl; union sockunion hctl; FILE *in; FILE *out; int tpe; int curtpe; int cpnd; int sunqe; int runqe; int mcse; int ntflg; char nti[17]; char nto[17]; int mapflg; char mi[MAXPATHLEN]; char mo[MAXPATHLEN]; } proxstruct, tmpstruct; struct comvars *ip, *op; abrtflag = 0; oldintr = xsignal(SIGINT, psabort); if (flag) { if (proxy) return; ip = &tmpstruct; op = &proxstruct; proxy++; } else { if (!proxy) return; ip = &proxstruct; op = &tmpstruct; proxy = 0; } ip->connect = connected; connected = op->connect; if (hostname) (void)strlcpy(ip->name, hostname, sizeof(ip->name)); else ip->name[0] = '\0'; hostname = op->name; ip->hctl = hisctladdr; hisctladdr = op->hctl; ip->mctl = myctladdr; myctladdr = op->mctl; ip->in = cin; cin = op->in; ip->out = cout; cout = op->out; ip->tpe = type; type = op->tpe; ip->curtpe = curtype; curtype = op->curtpe; ip->cpnd = cpend; cpend = op->cpnd; ip->sunqe = sunique; sunique = op->sunqe; ip->runqe = runique; runique = op->runqe; ip->mcse = mcase; mcase = op->mcse; ip->ntflg = ntflag; ntflag = op->ntflg; (void)strlcpy(ip->nti, ntin, sizeof(ip->nti)); (void)strlcpy(ntin, op->nti, sizeof(ntin)); (void)strlcpy(ip->nto, ntout, sizeof(ip->nto)); (void)strlcpy(ntout, op->nto, sizeof(ntout)); ip->mapflg = mapflag; mapflag = op->mapflg; (void)strlcpy(ip->mi, mapin, sizeof(ip->mi)); (void)strlcpy(mapin, op->mi, sizeof(mapin)); (void)strlcpy(ip->mo, mapout, sizeof(ip->mo)); (void)strlcpy(mapout, op->mo, sizeof(mapout)); (void)xsignal(SIGINT, oldintr); if (abrtflag) { abrtflag = 0; (*oldintr)(SIGINT); } } void abortpt(notused) int notused; { alarmtimer(0); putc('\n', ttyout); ptabflg++; mflag = 0; abrtflag = 0; longjmp(ptabort, 1); } void proxtrans(cmd, local, remote) const char *cmd, *local, *remote; { sig_t oldintr; int prox_type, nfnd; volatile int secndflag; char *cmd2; #ifdef __GNUC__ /* to shut up gcc warnings */ (void)&oldintr; (void)&cmd2; #endif oldintr = NULL; secndflag = 0; if (strcmp(cmd, "RETR")) cmd2 = "RETR"; else cmd2 = runique ? "STOU" : "STOR"; if ((prox_type = type) == 0) { if (unix_server && unix_proxy) prox_type = TYPE_I; else prox_type = TYPE_A; } if (curtype != prox_type) changetype(prox_type, 1); if (command("PASV") != COMPLETE) { fputs("proxy server does not support third party transfers.\n", ttyout); return; } pswitch(0); if (!connected) { fputs("No primary connection.\n", ttyout); pswitch(1); code = -1; return; } if (curtype != prox_type) changetype(prox_type, 1); if (command("PORT %s", pasv) != COMPLETE) { pswitch(1); return; } if (setjmp(ptabort)) goto abort; oldintr = xsignal(SIGINT, abortpt); if ((restart_point && #ifndef NO_QUAD (command("REST %lld", (long long) restart_point) != CONTINUE) #else (command("REST %ld", (long) restart_point) != CONTINUE) #endif ) || (command("%s %s", cmd, remote) != PRELIM)) { (void)xsignal(SIGINT, oldintr); pswitch(1); return; } sleep(2); pswitch(1); secndflag++; if ((restart_point && #ifndef NO_QUAD (command("REST %lld", (long long) restart_point) != CONTINUE) #else (command("REST %ld", (long) restart_point) != CONTINUE) #endif ) || (command("%s %s", cmd2, local) != PRELIM)) goto abort; ptflag++; (void)getreply(0); pswitch(0); (void)getreply(0); (void)xsignal(SIGINT, oldintr); pswitch(1); ptflag = 0; fprintf(ttyout, "local: %s remote: %s\n", local, remote); return; abort: (void)xsignal(SIGINT, SIG_IGN); ptflag = 0; if (strcmp(cmd, "RETR") && !proxy) pswitch(1); else if (!strcmp(cmd, "RETR") && proxy) pswitch(0); if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */ if (command("%s %s", cmd2, local) != PRELIM) { pswitch(0); if (cpend) abort_remote(NULL); } pswitch(1); if (ptabflg) code = -1; (void)xsignal(SIGINT, oldintr); return; } if (cpend) abort_remote(NULL); pswitch(!proxy); if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */ if (command("%s %s", cmd2, local) != PRELIM) { pswitch(0); if (cpend) abort_remote(NULL); pswitch(1); if (ptabflg) code = -1; (void)xsignal(SIGINT, oldintr); return; } } if (cpend) abort_remote(NULL); pswitch(!proxy); if (cpend) { if ((nfnd = empty(cin, NULL, 10)) <= 0) { if (nfnd < 0) { warn("abort"); } if (ptabflg) code = -1; lostpeer(); } (void)getreply(0); (void)getreply(0); } if (proxy) pswitch(0); pswitch(1); if (ptabflg) code = -1; (void)xsignal(SIGINT, oldintr); } void reset(argc, argv) int argc; char *argv[]; { int nfnd = 1; while (nfnd > 0) { if ((nfnd = empty(cin, NULL, 0)) < 0) { warn("reset"); code = -1; lostpeer(); } else if (nfnd) { (void)getreply(0); } } } char * gunique(local) const char *local; { static char new[MAXPATHLEN]; char *cp = strrchr(local, '/'); int d, count=0, len; char ext = '1'; if (cp) *cp = '\0'; d = access(cp == local ? "/" : cp ? local : ".", W_OK); if (cp) *cp = '/'; if (d < 0) { warn("local: %s", local); return (NULL); } len = strlcpy(new, local, sizeof(new)); cp = &new[len]; *cp++ = '.'; while (!d) { if (++count == 100) { fputs("runique: can't find unique file name.\n", ttyout); return (NULL); } *cp++ = ext; *cp = '\0'; if (ext == '9') ext = '0'; else ext++; if ((d = access(new, F_OK)) < 0) break; if (ext != '0') cp--; else if (*(cp - 2) == '.') *(cp - 1) = '1'; else { *(cp - 2) = *(cp - 2) + 1; cp--; } } return (new); } void abort_remote(din) FILE *din; { char buf[BUFSIZ]; int nfnd; if (cout == NULL) { warnx("Lost control connection for abort."); if (ptabflg) code = -1; lostpeer(); return; } /* * send IAC in urgent mode instead of DM because 4.3BSD places oob mark * after urgent byte rather than before as is protocol now */ buf[0] = IAC; buf[1] = IP; buf[2] = IAC; if (send(fileno(cout), buf, 3, MSG_OOB) != 3) warn("abort"); fprintf(cout, "%cABOR\r\n", DM); (void)fflush(cout); if ((nfnd = empty(cin, din, 10)) <= 0) { if (nfnd < 0) { warn("abort"); } if (ptabflg) code = -1; lostpeer(); } if (din && (nfnd & 2)) { while (read(fileno(din), buf, BUFSIZ) > 0) continue; } if (getreply(0) == ERROR && code == 552) { /* 552 needed for nic style abort */ (void)getreply(0); } (void)getreply(0); }