2 * Copyright (c) 1990, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#) Copyright (c) 1990, 1991, 1993 The Regents of the University of California. All rights reserved.
30 * @(#)startslip.c 8.1 (Berkeley) 6/5/93
31 * $FreeBSD: src/sbin/startslip/startslip.c,v 1.31.2.1 2000/05/07 18:26:51 joe Exp $
34 #include <sys/types.h>
52 #define DEFAULT_BAUD B9600
53 int speed = DEFAULT_BAUD;
54 #define FC_NONE 0 /* flow control: none */
55 #define FC_HW 1 /* flow control: hardware (RTS/CTS) */
56 int flowcontrol = FC_NONE;
57 int modem_control = 1; /* !CLOCAL+HUPCL iff we watch carrier. */
59 int uucp_lock = 0; /* uucp locking */
64 int locked = 0; /* uucp lock active */
66 int wait_time = 60; /* then back off */
67 int script_timeout = 90; /* connect script default timeout */
68 time_t conn_time, start_time;
69 int MAXTRIES = 6; /* w/60 sec and doubling, takes an hour */
70 #define PIDFILE "%sstartslip.%s.pid"
73 char *dials[MAXDIALS];
78 char *dvname, *devicename;
85 #define syslog fprintf
86 #define LOG_ERR stderr
87 #define LOG_INFO stderr
91 #define printd if (debug) printf
93 static int carrier(void);
94 static void down(int);
95 static int getline(char *, int, int, time_t);
96 static void usage(void);
97 static void sighup(int);
98 static void sigterm(int);
99 static void sigurg(int);
102 main(int argc, char **argv)
107 char *dialerstring = NULL, buf[BUFSIZ];
108 int unitnum, keepal = 0, outfill = 0;
111 char *upscript = NULL, *downscript = NULL;
112 int first = 1, tries = 0;
119 while ((ch = getopt(argc, argv, "dhlb:s:t:w:A:U:D:W:K:O:S:L")) != -1)
125 speed = atoi(optarg);
128 if (diali >= MAXDIALS)
129 errx(1, "max dial strings number (%d) exceeded", MAXDIALS);
130 dials[diali++] = strdup(optarg);
133 script_timeout = atoi(optarg);
136 wait_time = atoi(optarg);
139 MAXTRIES = atoi(optarg);
142 annex = strdup(optarg);
145 upscript = strdup(optarg);
148 downscript = strdup(optarg);
160 keepal = atoi(optarg);
163 outfill = atoi(optarg);
166 sl_unit = atoi(optarg);
179 * Copy these so they exist after we clobber them.
181 devicename = strdup(argv[0]);
182 username = strdup(argv[1]);
183 password = strdup(argv[2]);
186 * Security hack. Do not want private information such as the
187 * password and possible phone number to be left around.
188 * So we clobber the arguments.
190 for (ap = argv - optind + 1; ap < argv + 3; ap++)
191 for (cp = *ap; *cp != 0; cp++)
194 openlog("startslip", LOG_PID|LOG_PERROR, LOG_DAEMON);
197 setbuf(stdout, NULL);
199 signal(SIGTERM, sigterm);
200 if ((dvname = strrchr(devicename, '/')) == NULL)
205 result = snprintf(my_pidfile, sizeof(my_pidfile),
206 PIDFILE, _PATH_VARRUN, dvname);
207 if (result < 0 || (unsigned int)result >= sizeof(my_pidfile))
210 if ((pfd = fopen(my_pidfile, "r")) != NULL) {
211 if (fscanf(pfd, "%ld\n", &lpid) == 1) {
213 if (pid == lpid && pid > 0)
217 pfd = NULL; /* not remove pidfile yet */
218 sleep(5); /* allow down script to be completed */
221 signal(SIGHUP, SIG_IGN);
222 signal(SIGURG, SIG_IGN);
227 conn_time = time(NULL) - start_time;
234 } else if (fd >= 0) {
237 conn_time = time(NULL) - start_time;
245 syslog(LOG_INFO, "%s: connection time elapsed: %ld secs",
246 username, (long)conn_time);
247 sprintf(buf, "LINE=%d %s %s down",
248 diali ? (dialc - 1) % diali : 0,
249 downscript ? downscript : "/sbin/ifconfig" , unitname);
256 if (MAXTRIES > 0 && tries > MAXTRIES) {
257 syslog(LOG_ERR, "%s: exiting login after %d tries", username, tries);
264 syslog(LOG_INFO, "%s: sleeping %d seconds (%d tries)",
265 username, wait_time * (tries - 1), tries);
266 sleep(wait_time * (tries - 1));
271 if (daemon(1, debug) < 0) {
272 syslog(LOG_ERR, "%s: daemon: %m", username);
277 printd("restart: pid %ld: ", (long)pid);
278 if ((pfd = fopen(my_pidfile, "w")) != NULL) {
279 fprintf(pfd, "%ld\n", (long)pid);
285 if ((res = uu_lock(dvname)) != UU_LOCK_OK) {
286 if (res != UU_LOCK_INUSE)
287 syslog(LOG_ERR, "uu_lock: %s", uu_lockerr(res));
288 syslog(LOG_ERR, "%s: can't lock %s", username, devicename);
293 if ((fd = open(devicename, O_RDWR | O_NONBLOCK)) < 0) {
294 syslog(LOG_ERR, "%s: open %s: %m", username, devicename);
305 signal(SIGHUP, sighup);
306 if (ioctl(fd, TIOCSCTTY, 0) < 0) {
307 syslog(LOG_ERR, "%s: ioctl (TIOCSCTTY): %m", username);
310 if (tcsetpgrp(fd, getpid()) < 0) {
311 syslog(LOG_ERR, "%s: tcsetpgrp failed: %m", username);
315 if (tcgetattr(fd, &t) < 0) {
316 syslog(LOG_ERR, "%s: tcgetattr(%s): %m", username, devicename);
320 switch (flowcontrol) {
322 t.c_cflag |= (CRTS_IFLOW|CCTS_OFLOW);
325 t.c_cflag &= ~(CRTS_IFLOW|CCTS_OFLOW);
331 t.c_cflag &= ~(HUPCL);
332 t.c_cflag |= CLOCAL; /* until modem commands passes */
333 cfsetispeed(&t, speed);
334 cfsetospeed(&t, speed);
335 if (tcsetattr(fd, TCSAFLUSH, &t) < 0) {
336 syslog(LOG_ERR, "%s: tcsetattr(%s): %m", username, devicename);
339 sleep(2); /* wait for flakey line to settle */
340 if (hup || terminate)
343 wfd = fdopen(fd, "w+");
345 syslog(LOG_ERR, "%s: can't fdopen %s: %m", username, devicename);
351 dialerstring = dials[dialc++ % diali];
353 syslog(LOG_INFO, "%s: dialer string: %s\\r", username, dialerstring);
354 fprintf(wfd, "%s\r", dialerstring);
358 fintimeout = time(NULL) + script_timeout;
360 printd("waiting for carrier\n");
361 while (time(NULL) < fintimeout && !carrier()) {
363 if (hup || terminate)
368 t.c_cflag &= ~(CLOCAL);
369 if (tcsetattr(fd, TCSANOW, &t) < 0) {
370 syslog(LOG_ERR, "%s: tcsetattr(%s): %m", username, devicename);
373 /* Only now we able to receive HUP on carrier drop! */
379 printd("look for login: ");
381 if (getline(buf, BUFSIZ, fd, fintimeout) == 0 || hup || terminate)
384 if (bcmp(buf, annex, strlen(annex)) == 0) {
385 fprintf(wfd, "slip\r");
386 printd("Sent \"slip\"\n");
389 if (bcmp(&buf[1], "sername:", 8) == 0) {
390 fprintf(wfd, "%s\r", username);
391 printd("Sent login: %s\n", username);
394 if (bcmp(&buf[1], "assword:", 8) == 0) {
395 fprintf(wfd, "%s\r", password);
396 printd("Sent password: %s\n", password);
400 if (strstr(&buf[1], "ogin:") != NULL) {
401 fprintf(wfd, "%s\r", username);
402 printd("Sent login: %s\n", username);
405 if (strstr(&buf[1], "assword:") != NULL) {
406 fprintf(wfd, "%s\r", password);
407 printd("Sent password: %s\n", password);
413 sleep(5); /* Wait until login completed */
414 if (hup || terminate)
416 start_time = time(NULL);
422 if (ioctl(fd, TIOCSETD, &disc) < 0) {
423 syslog(LOG_ERR, "%s: ioctl (%s, TIOCSETD): %m",
424 username, devicename);
427 if (sl_unit >= 0 && ioctl(fd, SLIOCSUNIT, &sl_unit) < 0) {
428 syslog(LOG_ERR, "%s: ioctl(SLIOCSUNIT): %m", username);
431 if (ioctl(fd, SLIOCGUNIT, &unitnum) < 0) {
432 syslog(LOG_ERR, "%s: ioctl(SLIOCGUNIT): %m", username);
435 sprintf(unitname, "sl%d", unitnum);
438 signal(SIGURG, sigurg);
439 if (ioctl(fd, SLIOCSKEEPAL, &keepal) < 0) {
440 syslog(LOG_ERR, "%s: ioctl(SLIOCSKEEPAL): %m", username);
444 if (outfill > 0 && ioctl(fd, SLIOCSOUTFILL, &outfill) < 0) {
445 syslog(LOG_ERR, "%s: ioctl(SLIOCSOUTFILL): %m", username);
449 sprintf(buf, "LINE=%d %s %s up",
450 diali ? (dialc - 1) % diali : 0,
451 upscript ? upscript : "/sbin/ifconfig" , unitname);
456 syslog(LOG_INFO, "%s: reconnected on %s (%d tries)", username, unitname, tries);
458 syslog(LOG_INFO, "%s: connected on %s", username, unitname);
462 while (hup == 0 && terminate == 0) {
464 printd("sigpause return\n");
467 return(0); /* not reached */
471 sighup(int signo __unused)
474 if (hup == 0 && logged_in)
475 syslog(LOG_INFO, "%s: got hangup signal", username);
480 sigurg(int signo __unused)
483 if (hup == 0 && logged_in)
484 syslog(LOG_INFO, "%s: got dead line signal", username);
489 sigterm(int signo __unused)
491 printd("terminate\n");
492 if (terminate == 0 && logged_in)
493 syslog(LOG_INFO, "%s: got terminate signal", username);
498 getline(char *buf, int size, int this_fd, time_t fintimeout)
507 for (i = 0; i < size; i++) {
508 if (hup || terminate)
510 if ((timeout = fintimeout - time(NULL)) <= 0)
513 FD_SET(fd, &readfds);
516 if ((ret = select(this_fd + 1, &readfds, NULL, NULL, &tv)) < 0) {
518 syslog(LOG_ERR, "%s: getline: select: %m", username);
522 printd("getline: timed out\n");
525 if ((ret = read(this_fd, &buf[i], 1)) == 1) {
527 if (buf[i] == '\r' || buf[i] == '\0') {
531 if (buf[i] != '\n' && buf[i] != ':')
534 printd("Got %d: %s", i + 1, buf);
539 syslog(LOG_ERR, "%s: getline: read: %m", username);
541 syslog(LOG_ERR, "%s: read returned 0", username);
543 printd("returning %d after %d: %s\n", ret, i, buf);
556 if (ioctl(fd, TIOCMGET, &comstate) < 0) {
557 syslog(LOG_ERR, "%s: ioctl (%s, TIOCMGET): %m",
558 username, devicename);
561 return !!(comstate & TIOCM_CD);
571 if (uucp_lock && locked)
579 fprintf(stderr, "%s\n%s\n%s\n%s\n",
580 "usage: startslip [-d] [-b speed] [-s string1 [-s string2 [...]]] [-h] [-l]",
581 " [-L] [-A annexname] [-U upscript] [-D downscript]",
582 " [-t script_timeout] [-W maxtries] [-w retry_pause]",
583 " [-K keepalive] [-O outfill] [-S unit] device user passwd");