diff options
Diffstat (limited to 'contrib/tnftp/src/ftp.c')
| -rw-r--r-- | contrib/tnftp/src/ftp.c | 2149 |
1 files changed, 2149 insertions, 0 deletions
diff --git a/contrib/tnftp/src/ftp.c b/contrib/tnftp/src/ftp.c new file mode 100644 index 0000000..4c4942f --- /dev/null +++ b/contrib/tnftp/src/ftp.c @@ -0,0 +1,2149 @@ +/* $NetBSD: ftp.c,v 1.18 2009/05/20 12:53:47 lukem Exp $ */ +/* from NetBSD: ftp.c,v 1.159 2009/04/15 03:42:33 jld Exp */ + +/*- + * Copyright (c) 1996-2009 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. + * + * 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. 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 "tnftp.h" +#include <arpa/telnet.h> + +#if 0 /* tnftp */ + +#include <sys/cdefs.h> +#ifndef lint +#if 0 +static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94"; +#else +__RCSID(" NetBSD: ftp.c,v 1.159 2009/04/15 03:42:33 jld Exp "); +#endif +#endif /* not lint */ + +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/socket.h> +#include <sys/time.h> + +#include <netinet/in.h> +#include <netinet/in_systm.h> +#include <netinet/ip.h> +#include <arpa/inet.h> +#include <arpa/ftp.h> +#include <arpa/telnet.h> + +#include <ctype.h> +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <netdb.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <unistd.h> +#include <stdarg.h> + +#endif /* tnftp */ + +#include "ftp_var.h" + +volatile sig_atomic_t abrtflag; +volatile sig_atomic_t timeoutflag; + +sigjmp_buf ptabort; +int ptabflg; +int ptflag = 0; +char pasv[BUFSIZ]; /* passive port for proxy data connection */ + +static int empty(FILE *, FILE *, int); + +struct sockinet { + union sockunion { + struct sockaddr_in su_sin; +#ifdef INET6 + struct sockaddr_in6 su_sin6; +#endif + } si_su; +#if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) + int si_len; +#endif +}; + +#if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) +# define su_len si_len +#else +# define su_len si_su.su_sin.sin_len +#endif +#define su_family si_su.su_sin.sin_family +#define su_port si_su.su_sin.sin_port + +struct sockinet myctladdr, hisctladdr, data_addr; + +char * +hookup(const char *host, const char *port) +{ + int s = -1, error; + struct addrinfo hints, *res, *res0; + static char hostnamebuf[MAXHOSTNAMELEN]; + socklen_t len; + int on = 1; + + memset((char *)&hisctladdr, 0, sizeof (hisctladdr)); + memset((char *)&myctladdr, 0, sizeof (myctladdr)); + memset(&hints, 0, sizeof(hints)); + hints.ai_flags = AI_CANONNAME; + hints.ai_family = family; + hints.ai_socktype = SOCK_STREAM; + hints.ai_protocol = 0; + error = getaddrinfo(host, port, &hints, &res0); + if (error) { + warnx("Can't lookup `%s:%s': %s", host, port, + (error == EAI_SYSTEM) ? strerror(errno) + : 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) { + char hname[NI_MAXHOST], sname[NI_MAXSERV]; + + ai_unmapped(res); + if (getnameinfo(res->ai_addr, res->ai_addrlen, + hname, sizeof(hname), sname, sizeof(sname), + NI_NUMERICHOST | NI_NUMERICSERV) != 0) { + strlcpy(hname, "?", sizeof(hname)); + strlcpy(sname, "?", sizeof(sname)); + } + if (verbose && res0->ai_next) { + /* if we have multiple possibilities */ + fprintf(ttyout, "Trying %s:%s ...\n", hname, sname); + } + s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol); + if (s < 0) { + warn("Can't create socket for connection to `%s:%s'", + hname, sname); + continue; + } + if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) { + close(s); + s = -1; + continue; + } + + /* finally we got one */ + break; + } + if (s < 0) { + warnx("Can't connect to `%s:%s'", host, port); + code = -1; + freeaddrinfo(res0); + return 0; + } + memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen); + hisctladdr.su_len = res->ai_addrlen; + freeaddrinfo(res0); + res0 = res = NULL; + + len = hisctladdr.su_len; + if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) { + warn("Can't determine my address of connection to `%s:%s'", + host, port); + code = -1; + goto bad; + } + myctladdr.su_len = len; + +#ifdef IPTOS_LOWDELAY + if (hisctladdr.su_family == AF_INET) { + int tos = IPTOS_LOWDELAY; + if (setsockopt(s, IPPROTO_IP, IP_TOS, + (void *)&tos, sizeof(tos)) == -1) { + DWARN("setsockopt %s (ignored)", + "IPTOS_LOWDELAY"); + } + } +#endif + cin = fdopen(s, "r"); + cout = fdopen(s, "w"); + if (cin == NULL || cout == NULL) { + warnx("Can't fdopen socket"); + 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; + } + + if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, + (void *)&on, sizeof(on)) == -1) { + DWARN("setsockopt %s (ignored)", "SO_OOBINLINE"); + } + + return (hostname); + bad: + (void)close(s); + return (NULL); +} + +void +cmdabort(int notused) +{ + int oerrno = errno; + + sigint_raised = 1; + alarmtimer(0); + if (fromatty) + write(fileno(ttyout), "\n", 1); + abrtflag++; + if (ptflag) + siglongjmp(ptabort, 1); + errno = oerrno; +} + +void +cmdtimeout(int notused) +{ + int oerrno = errno; + + alarmtimer(0); + if (fromatty) + write(fileno(ttyout), "\n", 1); + timeoutflag++; + if (ptflag) + siglongjmp(ptabort, 1); + errno = oerrno; +} + +/*VARARGS*/ +int +command(const char *fmt, ...) +{ + va_list ap; + int r; + sigfunc oldsigint; + +#ifndef NO_DEBUG + if (ftp_debug) { + fputs("---> ", ttyout); + va_start(ap, fmt); + 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); + } +#endif + if (cout == NULL) { + warnx("No control connection for command"); + code = -1; + return (0); + } + + abrtflag = 0; + + oldsigint = xsignal(SIGINT, cmdabort); + + va_start(ap, fmt); + 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); +} + +static const char *m421[] = { + "remote server timed out. Connection closed", + "user interrupt. Connection closed", + "remote server has closed connection", +}; + +int +getreply(int expecteof) +{ + char current_line[BUFSIZ]; /* last line of previous reply */ + int c, n, lineno; + int dig; + int originalcode = 0, continuation = 0; + sigfunc oldsigint, oldsigalrm; + int pflag = 0; + char *cp, *pt = pasv; + + abrtflag = 0; + timeoutflag = 0; + + oldsigint = xsignal(SIGINT, cmdabort); + oldsigalrm = xsignal(SIGALRM, cmdtimeout); + + for (lineno = 0 ;; lineno++) { + dig = n = code = 0; + cp = current_line; + while (alarmtimer(quit_time ? quit_time : 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; + + alarmtimer(0); + if (expecteof && feof(cin)) { + (void)xsignal(SIGINT, oldsigint); + (void)xsignal(SIGALRM, oldsigalrm); + code = 221; + return (0); + } + cpend = 0; + lostpeer(0); + if (verbose) { + size_t midx; + if (reply_timeoutflag) + midx = 0; + else if (reply_abrtflag) + midx = 1; + else + midx = 2; + (void)fprintf(ttyout, + "421 Service not available, %s.\n", m421[midx]); + (void)fflush(ttyout); + } + code = 421; + (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 != ')') { + if (pt < &pasv[sizeof(pasv) - 1]) + *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 (cp[-1] == '\r') + cp[-1] = '\0'; + *cp = '\0'; + if (lineno == 0) + (void)strlcpy(reply_string, current_line, + sizeof(reply_string)); + if (lineno > 0 && code == 0 && reply_callback != NULL) + (*reply_callback)(current_line); + if (continuation && code != originalcode) { + if (originalcode == 0) + originalcode = code; + continue; + } + if (n != '1') + cpend = 0; + alarmtimer(0); + (void)xsignal(SIGINT, oldsigint); + (void)xsignal(SIGALRM, oldsigalrm); + if (code == 421 || originalcode == 421) + lostpeer(0); + if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN) + (*oldsigint)(SIGINT); + if (timeoutflag && oldsigalrm != cmdtimeout && + oldsigalrm != SIG_IGN) + (*oldsigalrm)(SIGINT); + return (n - '0'); + } +} + +static int +empty(FILE *ecin, FILE *din, int sec) +{ + int nr, nfd; + struct pollfd pfd[2]; + + nfd = 0; + if (ecin) { + pfd[nfd].fd = fileno(ecin); + pfd[nfd++].events = POLLIN; + } + + if (din) { + pfd[nfd].fd = fileno(din); + pfd[nfd++].events = POLLIN; + } + + if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0) + return nr; + + nr = 0; + nfd = 0; + if (ecin) + nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0; + if (din) + nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0; + return nr; +} + +sigjmp_buf xferabort; + +void +abortxfer(int notused) +{ + char msgbuf[100]; + size_t len; + + sigint_raised = 1; + alarmtimer(0); + mflag = 0; + abrtflag = 0; + switch (direction[0]) { + case 'r': + strlcpy(msgbuf, "\nreceive", sizeof(msgbuf)); + break; + case 's': + strlcpy(msgbuf, "\nsend", sizeof(msgbuf)); + break; + default: + errx(1, "abortxfer: unknown direction `%s'", direction); + } + len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n", + sizeof(msgbuf)); + write(fileno(ttyout), msgbuf, len); + siglongjmp(xferabort, 1); +} + +/* + * Read data from infd & write to outfd, using buf/bufsize as the temporary + * buffer, dealing with short writes. + * If rate_limit != 0, rate-limit the transfer. + * If hash_interval != 0, fputc('c', ttyout) every hash_interval bytes. + * Updates global variables: bytes. + * Returns 0 if ok, 1 if there was a read error, 2 if there was a write error. + * In the case of error, errno contains the appropriate error code. + */ +static int +copy_bytes(int infd, int outfd, char *buf, size_t bufsize, + int rate_limit, int hash_interval) +{ + volatile off_t hashc; + ssize_t inc, outc; + char *bufp; + struct timeval tvthen, tvnow, tvdiff; + off_t bufrem, bufchunk; + int serr; + + hashc = hash_interval; + if (rate_limit) + bufchunk = rate_limit; + else + bufchunk = bufsize; + + while (1) { + if (rate_limit) { + (void)gettimeofday(&tvthen, NULL); + } + errno = 0; + inc = outc = 0; + /* copy bufchunk at a time */ + bufrem = bufchunk; + while (bufrem > 0) { + inc = read(infd, buf, MIN((off_t)bufsize, bufrem)); + if (inc <= 0) + goto copy_done; + bytes += inc; + bufrem -= inc; + bufp = buf; + while (inc > 0) { + outc = write(outfd, bufp, inc); + if (outc < 0) + goto copy_done; + inc -= outc; + bufp += outc; + } + if (hash_interval) { + while (bytes >= hashc) { + (void)putc('#', ttyout); + hashc += hash_interval; + } + (void)fflush(ttyout); + } + } + if (rate_limit) { /* rate limited; wait if necessary */ + while (1) { + (void)gettimeofday(&tvnow, NULL); + timersub(&tvnow, &tvthen, &tvdiff); + if (tvdiff.tv_sec > 0) + break; + usleep(1000000 - tvdiff.tv_usec); + } + } + } + + copy_done: + serr = errno; + if (hash_interval && bytes > 0) { + if (bytes < hash_interval) + (void)putc('#', ttyout); + (void)putc('\n', ttyout); + (void)fflush(ttyout); + } + errno = serr; + if (inc == -1) + return 1; + if (outc == -1) + return 2; + + return 0; +} + +void +sendrequest(const char *cmd, const char *local, const char *remote, + int printnames) +{ + struct stat st; + int c; + FILE *volatile fin; + FILE *volatile dout; + int (*volatile closefunc)(FILE *); + sigfunc volatile oldintr; + sigfunc volatile oldintp; + off_t volatile hashbytes; + int hash_interval; + const char *lmode; + static size_t bufsize; + static char *buf; + int oprogress; + + hashbytes = mark; + direction = "sent"; + dout = NULL; + bytes = 0; + filesize = -1; + oprogress = progress; + if (verbose && printnames) { + if (*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 (sigsetjmp(xferabort, 1)) { + while (cpend) + (void)getreply(0); + code = -1; + goto cleanupsend; + } + (void)xsignal(SIGQUIT, psummary); + oldintr = xsignal(SIGINT, abortxfer); + 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("Can't execute `%s'", local + 1); + code = -1; + goto cleanupsend; + } + progress = 0; + closefunc = pclose; + } else { + fin = fopen(local, "r"); + if (fin == NULL) { + warn("Can't open `%s'", local); + code = -1; + goto cleanupsend; + } + closefunc = fclose; + if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) { + fprintf(ttyout, "%s: not a plain file.\n", local); + code = -1; + goto cleanupsend; + } + filesize = st.st_size; + } + if (initconn()) { + code = -1; + goto cleanupsend; + } + if (sigsetjmp(xferabort, 1)) + goto abort; + + if (restart_point && + (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) { + int rc; + + rc = -1; + switch (curtype) { + case TYPE_A: + rc = fseeko(fin, restart_point, SEEK_SET); + break; + case TYPE_I: + case TYPE_L: + rc = lseek(fileno(fin), restart_point, SEEK_SET); + break; + } + if (rc < 0) { + warn("Can't seek to restart `%s'", local); + goto cleanupsend; + } + if (command("REST " LLF, (LLT)restart_point) != CONTINUE) + goto cleanupsend; + lmode = "r+"; + } + if (remote) { + if (command("%s %s", cmd, remote) != PRELIM) + goto cleanupsend; + } else { + if (command("%s", cmd) != PRELIM) + goto cleanupsend; + } + dirchange = 1; + dout = dataconn(lmode); + if (dout == NULL) + goto abort; + + if ((size_t)sndbuf_size > bufsize) { + if (buf) + (void)free(buf); + bufsize = sndbuf_size; + buf = ftp_malloc(bufsize); + } + + progressmeter(-1); + oldintp = xsignal(SIGPIPE, SIG_IGN); + hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0; + + switch (curtype) { + + case TYPE_I: + case TYPE_L: + c = copy_bytes(fileno(fin), fileno(dout), buf, bufsize, + rate_put, hash_interval); + if (c == 1) { + warn("Reading `%s'", local); + } else if (c == 2) { + if (errno != EPIPE) + warn("Writing to network"); + bytes = -1; + } + break; + + case TYPE_A: + while ((c = getc(fin)) != EOF) { + if (c == '\n') { + while (hash_interval && 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 RFC0959 */ + if (c == '\r') { + (void)putc('\0', dout); + bytes++; + } +#endif + } + if (hash_interval) { + if (bytes < hashbytes) + (void)putc('#', ttyout); + (void)putc('\n', ttyout); + } + if (ferror(fin)) + warn("Reading `%s'", local); + if (ferror(dout)) { + if (errno != EPIPE) + warn("Writing to network"); + bytes = -1; + } + break; + } + + progressmeter(1); + if (closefunc != NULL) { + (*closefunc)(fin); + fin = NULL; + } + (void)fclose(dout); + dout = NULL; + (void)getreply(0); + if (bytes > 0) + ptransfer(0); + goto cleanupsend; + + abort: + (void)xsignal(SIGINT, oldintr); + oldintr = NULL; + if (!cpend) { + code = -1; + goto cleanupsend; + } + if (data >= 0) { + (void)close(data); + data = -1; + } + if (dout) { + (void)fclose(dout); + dout = NULL; + } + (void)getreply(0); + code = -1; + if (bytes > 0) + ptransfer(0); + + cleanupsend: + if (oldintr) + (void)xsignal(SIGINT, oldintr); + if (oldintp) + (void)xsignal(SIGPIPE, oldintp); + if (data >= 0) { + (void)close(data); + data = -1; + } + if (closefunc != NULL && fin != NULL) + (*closefunc)(fin); + if (dout) + (void)fclose(dout); + progress = oprogress; + restart_point = 0; + bytes = 0; +} + +void +recvrequest(const char *cmd, const char *volatile local, const char *remote, + const char *lmode, int printnames, int ignorespecial) +{ + FILE *volatile fout; + FILE *volatile din; + int (*volatile closefunc)(FILE *); + sigfunc volatile oldintr; + sigfunc volatile oldintp; + int c, d; + int volatile is_retr; + int volatile tcrflag; + int volatile bare_lfs; + static size_t bufsize; + static char *buf; + off_t volatile hashbytes; + int hash_interval; + struct stat st; + time_t mtime; + struct timeval tval[2]; + int oprogress; + int opreserve; + + 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 (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 (sigsetjmp(xferabort, 1)) { + while (cpend) + (void)getreply(0); + code = -1; + goto cleanuprecv; + } + (void)xsignal(SIGQUIT, psummary); + oldintr = xsignal(SIGINT, abortxfer); + if (ignorespecial || (strcmp(local, "-") && *local != '|')) { + if (access(local, W_OK) < 0) { + char *dir = strrchr(local, '/'); + + if (errno != ENOENT && errno != EACCES) { + warn("Can't access `%s'", local); + code = -1; + goto cleanuprecv; + } + if (dir != NULL) + *dir = 0; + d = access(dir == local ? "/" : + dir ? local : ".", W_OK); + if (dir != NULL) + *dir = '/'; + if (d < 0) { + warn("Can't access `%s'", local); + code = -1; + goto cleanuprecv; + } + if (!runique && errno == EACCES && + chmod(local, (S_IRUSR|S_IWUSR)) < 0) { + warn("Can't chmod `%s'", local); + code = -1; + goto cleanuprecv; + } + if (runique && errno == EACCES && + (local = gunique(local)) == NULL) { + code = -1; + goto cleanuprecv; + } + } + else if (runique && (local = gunique(local)) == NULL) { + code = -1; + 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 (code == 421 || code == -1) + goto cleanuprecv; + } + if (initconn()) { + code = -1; + goto cleanuprecv; + } + if (sigsetjmp(xferabort, 1)) + goto abort; + if (is_retr && restart_point && + command("REST " LLF, (LLT) restart_point) != CONTINUE) + goto cleanuprecv; + if (! EMPTYSTRING(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("Can't execute `%s'", local+1); + goto abort; + } + progress = 0; + preserve = 0; + closefunc = pclose; + } else { + fout = fopen(local, lmode); + if (fout == NULL) { + warn("Can't open `%s'", local); + goto abort; + } + closefunc = fclose; + } + + if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) { + progress = 0; + preserve = 0; + } + if ((size_t)rcvbuf_size > bufsize) { + if (buf) + (void)free(buf); + bufsize = rcvbuf_size; + buf = ftp_malloc(bufsize); + } + + progressmeter(-1); + hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0; + + switch (curtype) { + + case TYPE_I: + case TYPE_L: + if (is_retr && restart_point && + lseek(fileno(fout), restart_point, SEEK_SET) < 0) { + warn("Can't seek to restart `%s'", local); + goto cleanuprecv; + } + c = copy_bytes(fileno(din), fileno(fout), buf, bufsize, + rate_get, hash_interval); + if (c == 1) { + if (errno != EPIPE) + warn("Reading from network"); + bytes = -1; + } else if (c == 2) { + warn("Writing `%s'", local); + } + break; + + case TYPE_A: + if (is_retr && restart_point) { + int ch; + off_t i; + + if (fseeko(fout, (off_t)0, SEEK_SET) < 0) + goto done; + for (i = 0; i++ < restart_point;) { + if ((ch = getc(fout)) == EOF) + goto done; + if (ch == '\n') + i++; + } + if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) { + done: + warn("Can't seek to restart `%s'", local); + goto cleanuprecv; + } + } + while ((c = getc(din)) != EOF) { + if (c == '\n') + bare_lfs++; + while (c == '\r') { + while (hash_interval && 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_interval) { + if (bytes < hashbytes) + (void)putc('#', ttyout); + (void)putc('\n', ttyout); + } + if (ferror(din)) { + if (errno != EPIPE) + warn("Reading from network"); + bytes = -1; + } + if (ferror(fout)) + warn("Writing `%s'", local); + break; + } + + progressmeter(1); + if (closefunc != NULL) { + (*closefunc)(fout); + fout = NULL; + } + (void)fclose(din); + din = 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, + rfc2822time(localtime(&mtime))); + } + } + } + } + goto cleanuprecv; + + abort: + /* + * abort using RFC0959 recommended IP,SYNC sequence + */ + if (! sigsetjmp(xferabort, 1)) { + /* this is the first call */ + (void)xsignal(SIGINT, abort_squared); + if (!cpend) { + code = -1; + goto cleanuprecv; + } + abort_remote(din); + } + code = -1; + if (bytes > 0) + ptransfer(0); + + cleanuprecv: + if (oldintr) + (void)xsignal(SIGINT, oldintr); + if (oldintp) + (void)xsignal(SIGPIPE, oldintp); + if (data >= 0) { + (void)close(data); + data = -1; + } + if (closefunc != NULL && fout != NULL) + (*closefunc)(fout); + if (din) + (void)fclose(din); + 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(void) +{ + char *p, *a; + int result, tmpno = 0; + int on = 1; + int error; + unsigned int addr[16], port[2]; + unsigned int af, hal, pal; + socklen_t len; + const char *pasvcmd = NULL; + int overbose; + +#ifdef INET6 +#ifndef NO_DEBUG + if (myctladdr.su_family == AF_INET6 && ftp_debug && + (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) || + IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) { + warnx("Use of scoped addresses can be troublesome"); + } +#endif +#endif + + reinit: + if (passivemode) { + data_addr = myctladdr; + data = socket(data_addr.su_family, SOCK_STREAM, 0); + if (data < 0) { + warn("Can't create socket for data connection"); + return (1); + } + if ((options & SO_DEBUG) && + setsockopt(data, SOL_SOCKET, SO_DEBUG, + (void *)&on, sizeof(on)) == -1) { + DWARN("setsockopt %s (ignored)", "SO_DEBUG"); + } + result = COMPLETE + 1; + switch (data_addr.su_family) { + case AF_INET: + if (epsv4 && !epsv4bad) { + pasvcmd = "EPSV"; + overbose = verbose; + if (ftp_debug == 0) + verbose = -1; + result = command("EPSV"); + verbose = overbose; + if (verbose > 0 && + (result == COMPLETE || !connected)) + fprintf(ttyout, "%s\n", reply_string); + if (!connected) + return (1); + /* + * 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; + DPRINTF("disabling epsv4 for this " + "connection\n"); + } + } + if (result != COMPLETE) { + pasvcmd = "PASV"; + result = command("PASV"); + if (!connected) + return (1); + } + break; +#ifdef INET6 + case AF_INET6: + if (epsv6 && !epsv6bad) { + pasvcmd = "EPSV"; + overbose = verbose; + if (ftp_debug == 0) + verbose = -1; + result = command("EPSV"); + verbose = overbose; + if (verbose > 0 && + (result == COMPLETE || !connected)) + fprintf(ttyout, "%s\n", reply_string); + if (!connected) + return (1); + /* + * 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) { + epsv6bad = 1; + DPRINTF("disabling epsv6 for this " + "connection\n"); + } + } + if (result != COMPLETE) { + pasvcmd = "LPSV"; + result = command("LPSV"); + } + if (!connected) + return (1); + break; +#endif + default: + result = COMPLETE + 1; + break; + } + if (result != COMPLETE) { + if (activefallback) { + (void)close(data); + data = -1; + passivemode = 0; +#if 0 + activefallback = 0; +#endif + 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)) +#define UC(b) (((int)b)&0xff) + + /* + * 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.si_su.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.si_su.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); + { + size_t i; + for (i = 0; i < sizeof(struct in6_addr); i++) { + data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] = + UC(addr[i]); + } + } + 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; + + if (ftp_connect(data, (struct sockaddr *)&data_addr.si_su, + data_addr.su_len) < 0) { + if (activefallback) { + (void)close(data); + data = -1; + passivemode = 0; +#if 0 + activefallback = 0; +#endif + goto reinit; + } + goto bad; + } +#ifdef IPTOS_THROUGHPUT + if (data_addr.su_family == AF_INET) { + on = IPTOS_THROUGHPUT; + if (setsockopt(data, IPPROTO_IP, IP_TOS, + (void *)&on, sizeof(on)) == -1) { + DWARN("setsockopt %s (ignored)", + "IPTOS_THROUGHPUT"); + } + } +#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("Can't create socket for data connection"); + if (tmpno) + sendport = 1; + return (1); + } + if (!sendport) + if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, + (void *)&on, sizeof(on)) == -1) { + warn("Can't set SO_REUSEADDR on data connection"); + goto bad; + } + if (bind(data, (struct sockaddr *)&data_addr.si_su, + data_addr.su_len) < 0) { + warn("Can't bind for data connection"); + goto bad; + } + if ((options & SO_DEBUG) && + setsockopt(data, SOL_SOCKET, SO_DEBUG, + (void *)&on, sizeof(on)) == -1) { + DWARN("setsockopt %s (ignored)", "SO_DEBUG"); + } + len = sizeof(data_addr.si_su); + memset((char *)&data_addr, 0, sizeof (data_addr)); + if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) { + warn("Can't determine my address of data connection"); + goto bad; + } + data_addr.su_len = len; + if (ftp_listen(data, 1) < 0) + warn("Can't listen to data connection"); + + if (sendport) { + char hname[NI_MAXHOST], sname[NI_MAXSERV]; + struct sockinet tmp; + + switch (data_addr.su_family) { + case AF_INET: + if (!epsv4 || epsv4bad) { + result = COMPLETE + 1; + break; + } + /* FALLTHROUGH */ +#ifdef INET6 + case AF_INET6: + if (!epsv6 || epsv6bad) { + result = COMPLETE + 1; + break; + } +#endif + af = (data_addr.su_family == AF_INET) ? 1 : 2; + tmp = data_addr; +#ifdef INET6 + if (tmp.su_family == AF_INET6) + tmp.si_su.su_sin6.sin6_scope_id = 0; +#endif + if (getnameinfo((struct sockaddr *)&tmp.si_su, + tmp.su_len, hname, sizeof(hname), sname, + sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) { + result = ERROR; + } else { + overbose = verbose; + if (ftp_debug == 0) + verbose = -1; + result = command("EPRT |%u|%s|%s|", af, hname, + sname); + verbose = overbose; + if (verbose > 0 && + (result == COMPLETE || !connected)) + fprintf(ttyout, "%s\n", reply_string); + if (!connected) + return (1); + if (result != COMPLETE) { + epsv4bad = 1; + DPRINTF("disabling epsv4 for this " + "connection\n"); + } + } + break; + default: + result = COMPLETE + 1; + break; + } + if (result == COMPLETE) + goto skip_port; + + switch (data_addr.su_family) { + case AF_INET: + a = (char *)&data_addr.si_su.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.si_su.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 */ + } + if (!connected) + return (1); + skip_port: + + if (result == ERROR && sendport == -1) { + sendport = 0; + tmpno = 1; + goto noport; + } + return (result != COMPLETE); + } + if (tmpno) + sendport = 1; +#ifdef IPTOS_THROUGHPUT + if (data_addr.su_family == AF_INET) { + on = IPTOS_THROUGHPUT; + if (setsockopt(data, IPPROTO_IP, IP_TOS, + (void *)&on, sizeof(on)) == -1) { + DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); + } + } +#endif + return (0); + bad: + (void)close(data); + data = -1; + if (tmpno) + sendport = 1; + return (1); +} + +FILE * +dataconn(const char *lmode) +{ + struct sockinet from; + int s, flags, rv, timeout; + struct timeval endtime, now, td; + struct pollfd pfd[1]; + socklen_t fromlen; + + if (passivemode) /* passive data connection */ + return (fdopen(data, lmode)); + + /* active mode data connection */ + + if ((flags = fcntl(data, F_GETFL, 0)) == -1) + goto dataconn_failed; /* get current socket flags */ + if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1) + goto dataconn_failed; /* set non-blocking connect */ + + /* NOTE: we now must restore socket flags on successful exit */ + + /* limit time waiting on listening socket */ + pfd[0].fd = data; + pfd[0].events = POLLIN; + (void)gettimeofday(&endtime, NULL); /* determine end time */ + endtime.tv_sec += (quit_time > 0) ? quit_time: 60; + /* without -q, default to 60s */ + do { + (void)gettimeofday(&now, NULL); + timersub(&endtime, &now, &td); + timeout = td.tv_sec * 1000 + td.tv_usec/1000; + if (timeout < 0) + timeout = 0; + rv = ftp_poll(pfd, 1, timeout); + } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */ + if (rv == -1) { + warn("Can't poll waiting before accept"); + goto dataconn_failed; + } + if (rv == 0) { + warnx("Poll timeout waiting before accept"); + goto dataconn_failed; + } + + /* (non-blocking) accept the connection */ + fromlen = myctladdr.su_len; + do { + s = accept(data, (struct sockaddr *) &from.si_su, &fromlen); + } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */ + if (s == -1) { + warn("Can't accept data connection"); + goto dataconn_failed; + } + + (void)close(data); + data = s; + if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */ + goto dataconn_failed; + +#ifdef IPTOS_THROUGHPUT + if (from.su_family == AF_INET) { + int tos = IPTOS_THROUGHPUT; + if (setsockopt(s, IPPROTO_IP, IP_TOS, + (void *)&tos, sizeof(tos)) == -1) { + DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); + } + } +#endif + return (fdopen(data, lmode)); + + dataconn_failed: + (void)close(data); + data = -1; + return (NULL); +} + +void +psabort(int notused) +{ + int oerrno = errno; + + sigint_raised = 1; + alarmtimer(0); + abrtflag++; + errno = oerrno; +} + +void +pswitch(int flag) +{ + sigfunc oldintr; + static struct comvars { + int connect; + char name[MAXHOSTNAMELEN]; + struct sockinet mctl; + struct sockinet 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(int notused) +{ + + sigint_raised = 1; + alarmtimer(0); + if (fromatty) + write(fileno(ttyout), "\n", 1); + ptabflg++; + mflag = 0; + abrtflag = 0; + siglongjmp(ptabort, 1); +} + +void +proxtrans(const char *cmd, const char *local, const char *remote) +{ + sigfunc volatile oldintr; + int prox_type, nfnd; + int volatile secndflag; + const char *volatile cmd2; + + 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 (sigsetjmp(ptabort, 1)) + goto abort; + oldintr = xsignal(SIGINT, abortpt); + if ((restart_point && + (command("REST " LLF, (LLT) restart_point) != CONTINUE)) + || (command("%s %s", cmd, remote) != PRELIM)) { + (void)xsignal(SIGINT, oldintr); + pswitch(1); + return; + } + sleep(2); + pswitch(1); + secndflag++; + if ((restart_point && + (command("REST " LLF, (LLT) restart_point) != CONTINUE)) + || (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: + if (sigsetjmp(xferabort, 1)) { + (void)xsignal(SIGINT, oldintr); + return; + } + (void)xsignal(SIGINT, abort_squared); + 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("Error aborting proxy command"); + if (ptabflg) + code = -1; + lostpeer(0); + } + (void)getreply(0); + (void)getreply(0); + } + if (proxy) + pswitch(0); + pswitch(1); + if (ptabflg) + code = -1; + (void)xsignal(SIGINT, oldintr); +} + +void +reset(int argc, char *argv[]) +{ + int nfnd = 1; + + if (argc == 0 && argv != NULL) { + UPRINTF("usage: %s\n", argv[0]); + code = -1; + return; + } + while (nfnd > 0) { + if ((nfnd = empty(cin, NULL, 0)) < 0) { + warn("Error resetting connection"); + code = -1; + lostpeer(0); + } else if (nfnd) + (void)getreply(0); + } +} + +char * +gunique(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("Can't access `%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); +} + +/* + * abort_squared -- + * aborts abort_remote(). lostpeer() is called because if the user is + * too impatient to wait or there's another problem then ftp really + * needs to get back to a known state. + */ +void +abort_squared(int dummy) +{ + char msgbuf[100]; + size_t len; + + sigint_raised = 1; + alarmtimer(0); + len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n", + sizeof(msgbuf)); + write(fileno(ttyout), msgbuf, len); + lostpeer(0); + siglongjmp(xferabort, 1); +} + +void +abort_remote(FILE *din) +{ + char buf[BUFSIZ]; + int nfnd; + + if (cout == NULL) { + warnx("Lost control connection for abort"); + if (ptabflg) + code = -1; + lostpeer(0); + 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("Can't send abort message"); + fprintf(cout, "%cABOR\r\n", DM); + (void)fflush(cout); + if ((nfnd = empty(cin, din, 10)) <= 0) { + if (nfnd < 0) + warn("Can't send abort message"); + if (ptabflg) + code = -1; + lostpeer(0); + } + 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); +} + +/* + * Ensure that ai->ai_addr is NOT an IPv4 mapped address. + * IPv4 mapped address complicates too many things in FTP + * protocol handling, as FTP protocol is defined differently + * between IPv4 and IPv6. + * + * This may not be the best way to handle this situation, + * since the semantics of IPv4 mapped address is defined in + * the kernel. There are configurations where we should use + * IPv4 mapped address as native IPv6 address, not as + * "an IPv6 address that embeds IPv4 address" (namely, SIIT). + * + * More complete solution would be to have an additional + * getsockopt to grab "real" peername/sockname. "real" + * peername/sockname will be AF_INET if IPv4 mapped address + * is used to embed IPv4 address, and will be AF_INET6 if + * we use it as native. What a mess! + */ +void +ai_unmapped(struct addrinfo *ai) +{ +#ifdef INET6 + struct sockaddr_in6 *sin6; + struct sockaddr_in sin; + socklen_t len; + + if (ai->ai_family != AF_INET6) + return; + if (ai->ai_addrlen != sizeof(struct sockaddr_in6) || + sizeof(sin) > ai->ai_addrlen) + return; + sin6 = (struct sockaddr_in6 *)ai->ai_addr; + if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) + return; + + memset(&sin, 0, sizeof(sin)); + sin.sin_family = AF_INET; + len = sizeof(struct sockaddr_in); + memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12], + sizeof(sin.sin_addr)); + sin.sin_port = sin6->sin6_port; + + ai->ai_family = AF_INET; +#if defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) + sin.sin_len = len; +#endif + memcpy(ai->ai_addr, &sin, len); + ai->ai_addrlen = len; +#endif +} + +#ifdef NO_USAGE +void +xusage(void) +{ + fputs("Usage error\n", ttyout); +} +#endif |
