507 lines
12 KiB
C
507 lines
12 KiB
C
|
|
/*-
|
|
* Copyright (c) 1990, 1991, 1993
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char copyright[] =
|
|
"@(#) Copyright (c) 1990, 1991, 1993\n\
|
|
The Regents of the University of California. All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)startslip.c 8.1 (Berkeley) 6/5/93";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/param.h>
|
|
#if BSD >= 199006
|
|
#define POSIX
|
|
#endif
|
|
#ifdef POSIX
|
|
#include <sys/termios.h>
|
|
#include <sys/ioctl.h>
|
|
#else
|
|
#include <sgtty.h>
|
|
#endif
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/syslog.h>
|
|
#include <netinet/in.h>
|
|
#include <net/if.h>
|
|
#include <net/if_slvar.h>
|
|
#include <net/slip.h>
|
|
#include <netdb.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#define DEFAULT_BAUD B9600
|
|
int speed = DEFAULT_BAUD;
|
|
#define FC_NONE 0 /* flow control: none */
|
|
#define FC_SW 1 /* flow control: software (XON/XOFF) */
|
|
#define FC_HW 2 /* flow control: hardware (RTS/CTS) */
|
|
int flowcontrol = FC_NONE;
|
|
char *annex;
|
|
int hup;
|
|
int logged_in = 0;
|
|
int wait_time = 60; /* then back off */
|
|
#define MAXTRIES 6 /* w/60 sec and doubling, takes an hour */
|
|
#define PIDFILE "/var/run/startslip.pid"
|
|
|
|
#ifdef DEBUG
|
|
int debug = 1;
|
|
#undef LOG_ERR
|
|
#undef LOG_INFO
|
|
#define syslog fprintf
|
|
#define LOG_ERR stderr
|
|
#define LOG_INFO stderr
|
|
#else
|
|
int debug = 0;
|
|
#endif
|
|
#define printd if (debug) printf
|
|
|
|
main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
extern char *optarg;
|
|
extern int optind;
|
|
char *cp, **ap;
|
|
int ch, disc;
|
|
int fd = -1;
|
|
void sighup();
|
|
FILE *wfd = NULL, *pfd;
|
|
char *dialerstring = 0, buf[BUFSIZ];
|
|
int unitnum;
|
|
char unitname[32];
|
|
char *devicename, *username, *password;
|
|
char *upscript = NULL, *downscript = NULL;
|
|
int first = 1, tries = 0;
|
|
int pausefirst = 0;
|
|
int pid;
|
|
#ifdef POSIX
|
|
struct termios t;
|
|
#else
|
|
struct sgttyb sgtty;
|
|
#endif
|
|
|
|
while ((ch = getopt(argc, argv, "db:s:p:A:F:U:D:")) != EOF)
|
|
switch (ch) {
|
|
case 'd':
|
|
debug = 1;
|
|
break;
|
|
#ifdef POSIX
|
|
case 'b':
|
|
speed = atoi(optarg);
|
|
break;
|
|
#endif
|
|
case 'p':
|
|
pausefirst = atoi(optarg);
|
|
break;
|
|
case 's':
|
|
dialerstring = strdup(optarg);
|
|
break;
|
|
case 'A':
|
|
annex = strdup(optarg);
|
|
break;
|
|
case 'U':
|
|
upscript = strdup(optarg);
|
|
break;
|
|
case 'D':
|
|
downscript = strdup(optarg);
|
|
break;
|
|
case 'F':
|
|
#ifdef POSIX
|
|
if (strcmp(optarg, "none") == 0)
|
|
flowcontrol = FC_NONE;
|
|
else if (strcmp(optarg, "sw") == 0)
|
|
flowcontrol = FC_SW;
|
|
else if (strcmp(optarg, "hw") == 0)
|
|
flowcontrol = FC_HW;
|
|
else {
|
|
(void)fprintf(stderr,
|
|
"flow control: none, sw, hw\n");
|
|
exit(1);
|
|
}
|
|
break;
|
|
#else
|
|
(void)fprintf(stderr, "flow control not supported\n");
|
|
exit(1);
|
|
#endif
|
|
case '?':
|
|
default:
|
|
usage();
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc != 3)
|
|
usage();
|
|
|
|
/*
|
|
* Copy these so they exist after we clobber them.
|
|
*/
|
|
devicename = strdup(argv[0]);
|
|
username = strdup(argv[1]);
|
|
password = strdup(argv[2]);
|
|
|
|
/*
|
|
* Security hack. Do not want private information such as the
|
|
* password and possible phone number to be left around.
|
|
* So we clobber the arguments.
|
|
*/
|
|
for (ap = argv - optind + 1; ap < argv + 3; ap++)
|
|
for (cp = *ap; *cp != 0; cp++)
|
|
*cp = '\0';
|
|
|
|
openlog("startslip", LOG_PID, LOG_DAEMON);
|
|
|
|
#if BSD <= 43
|
|
if (debug == 0 && (fd = open("/dev/tty", 0)) >= 0) {
|
|
ioctl(fd, TIOCNOTTY, 0);
|
|
close(fd);
|
|
fd = -1;
|
|
}
|
|
#endif
|
|
|
|
if (debug)
|
|
setbuf(stdout, NULL);
|
|
|
|
if (pfd = fopen(PIDFILE, "r")) {
|
|
pid = 0;
|
|
fscanf(pfd, "%d", &pid);
|
|
if (pid > 0)
|
|
kill(pid, SIGUSR1);
|
|
fclose(pfd);
|
|
}
|
|
restart:
|
|
if (logged_in) {
|
|
sprintf(buf, "%s %s down", downscript ? downscript : "ifconfig" , unitname);
|
|
(void) system(buf);
|
|
}
|
|
logged_in = 0;
|
|
if (++tries > MAXTRIES) {
|
|
syslog(LOG_ERR, "exiting after %d tries\n", tries);
|
|
/* ???
|
|
if (first)
|
|
*/
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* We may get a HUP below, when the parent (session leader/
|
|
* controlling process) exits; ignore HUP until into new session.
|
|
*/
|
|
signal(SIGHUP, SIG_IGN);
|
|
hup = 0;
|
|
if (fork() > 0) {
|
|
if (pausefirst)
|
|
sleep(pausefirst);
|
|
if (first)
|
|
printd("parent exit\n");
|
|
exit(0);
|
|
}
|
|
pausefirst = 0;
|
|
#ifdef POSIX
|
|
if (setsid() == -1)
|
|
perror("setsid");
|
|
#endif
|
|
pid = getpid();
|
|
printd("restart: pid %d: ", pid);
|
|
if (pfd = fopen(PIDFILE, "w")) {
|
|
fprintf(pfd, "%d\n", pid);
|
|
fclose(pfd);
|
|
}
|
|
if (wfd) {
|
|
printd("fclose, ");
|
|
fclose(wfd);
|
|
wfd == NULL;
|
|
}
|
|
if (fd >= 0) {
|
|
printd("close, ");
|
|
close(fd);
|
|
sleep(5);
|
|
}
|
|
printd("open");
|
|
if ((fd = open(devicename, O_RDWR)) < 0) {
|
|
perror(devicename);
|
|
syslog(LOG_ERR, "open %s: %m\n", devicename);
|
|
if (first)
|
|
exit(1);
|
|
else {
|
|
syslog(LOG_INFO, "sleeping %d seconds (%d tries).\n", wait_time * tries, tries);
|
|
sleep(wait_time * tries);
|
|
goto restart;
|
|
}
|
|
}
|
|
printd(" %d", fd);
|
|
#ifdef TIOCSCTTY
|
|
if (ioctl(fd, TIOCSCTTY, 0) < 0)
|
|
perror("ioctl (TIOCSCTTY)");
|
|
#endif
|
|
signal(SIGHUP, sighup);
|
|
if (debug) {
|
|
if (ioctl(fd, TIOCGETD, &disc) < 0)
|
|
perror("ioctl(TIOCSETD)");
|
|
printf(" (disc was %d)", disc);
|
|
}
|
|
disc = TTYDISC;
|
|
if (ioctl(fd, TIOCSETD, &disc) < 0) {
|
|
perror("ioctl(TIOCSETD)");
|
|
syslog(LOG_ERR, "%s: ioctl (TIOCSETD 0): %m\n",
|
|
devicename);
|
|
}
|
|
printd(", ioctl");
|
|
#ifdef POSIX
|
|
if (tcgetattr(fd, &t) < 0) {
|
|
perror("tcgetattr");
|
|
syslog(LOG_ERR, "%s: tcgetattr: %m\n", devicename);
|
|
exit(2);
|
|
}
|
|
cfmakeraw(&t);
|
|
t.c_iflag &= ~IMAXBEL;
|
|
switch (flowcontrol) {
|
|
case FC_HW:
|
|
t.c_cflag |= (CRTS_IFLOW|CCTS_OFLOW);
|
|
break;
|
|
case FC_SW:
|
|
t.c_iflag |= (IXON|IXOFF);
|
|
break;
|
|
case FC_NONE:
|
|
t.c_cflag &= ~(CRTS_IFLOW|CCTS_OFLOW);
|
|
t.c_iflag &= ~(IXON|IXOFF);
|
|
break;
|
|
}
|
|
cfsetspeed(&t, speed);
|
|
if (tcsetattr(fd, TCSAFLUSH, &t) < 0) {
|
|
perror("tcsetattr");
|
|
syslog(LOG_ERR, "%s: tcsetattr: %m\n", devicename);
|
|
if (first)
|
|
exit(2);
|
|
else {
|
|
syslog(LOG_INFO, "sleeping %d seconds (%d tries).\n", wait_time * tries, tries);
|
|
sleep(wait_time * tries);
|
|
goto restart;
|
|
}
|
|
}
|
|
#else
|
|
if (ioctl(fd, TIOCGETP, &sgtty) < 0) {
|
|
perror("ioctl (TIOCGETP)");
|
|
syslog(LOG_ERR, "%s: ioctl (TIOCGETP): %m\n",
|
|
devicename);
|
|
exit(2);
|
|
}
|
|
sgtty.sg_flags = RAW | ANYP;
|
|
sgtty.sg_erase = sgtty.sg_kill = 0377;
|
|
sgtty.sg_ispeed = sgtty.sg_ospeed = speed;
|
|
if (ioctl(fd, TIOCSETP, &sgtty) < 0) {
|
|
perror("ioctl (TIOCSETP)");
|
|
syslog(LOG_ERR, "%s: ioctl (TIOCSETP): %m\n",
|
|
devicename);
|
|
if (first)
|
|
exit(2);
|
|
else {
|
|
syslog(LOG_INFO, "sleeping %d seconds (%d tries).\n", wait_time * tries, tries);
|
|
sleep(wait_time * tries);
|
|
goto restart;
|
|
}
|
|
}
|
|
#endif
|
|
sleep(2); /* wait for flakey line to settle */
|
|
if (hup)
|
|
goto restart;
|
|
|
|
wfd = fdopen(fd, "w+");
|
|
if (wfd == NULL) {
|
|
syslog(LOG_ERR, "can't fdopen slip line\n");
|
|
exit(10);
|
|
}
|
|
setbuf(wfd, (char *)0);
|
|
if (dialerstring) {
|
|
printd(", send dialstring");
|
|
fprintf(wfd, "%s\r", dialerstring);
|
|
} else
|
|
putc('\r', wfd);
|
|
printd("\n");
|
|
|
|
/*
|
|
* Log in
|
|
*/
|
|
printd("look for login: ");
|
|
for (;;) {
|
|
if (getline(buf, BUFSIZ, fd, 90) == 0 || hup) {
|
|
syslog(LOG_INFO, "sleeping %d seconds (%d tries).\n", wait_time * tries, tries);
|
|
sleep(wait_time * tries);
|
|
goto restart;
|
|
}
|
|
if (annex) {
|
|
if (bcmp(buf, annex, strlen(annex)) == 0) {
|
|
fprintf(wfd, "slip\r");
|
|
printd("Sent \"slip\"\n");
|
|
continue;
|
|
}
|
|
if (bcmp(&buf[1], "sername:", 8) == 0) {
|
|
fprintf(wfd, "%s\r", username);
|
|
printd("Sent login: %s\n", username);
|
|
continue;
|
|
}
|
|
if (bcmp(&buf[1], "assword:", 8) == 0) {
|
|
fprintf(wfd, "%s\r", password);
|
|
printd("Sent password: %s\n", password);
|
|
break;
|
|
}
|
|
} else {
|
|
if (bcmp(&buf[1], "ogin:", 5) == 0) {
|
|
fprintf(wfd, "%s\r", username);
|
|
printd("Sent login: %s\n", username);
|
|
continue;
|
|
}
|
|
if (bcmp(&buf[1], "assword:", 8) == 0) {
|
|
fprintf(wfd, "%s\r", password);
|
|
printd("Sent password: %s\n", password);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Attach
|
|
*/
|
|
printd("setd");
|
|
disc = SLIPDISC;
|
|
if (ioctl(fd, TIOCSETD, &disc) < 0) {
|
|
perror("ioctl(TIOCSETD)");
|
|
syslog(LOG_ERR, "%s: ioctl (TIOCSETD SLIP): %m\n",
|
|
devicename);
|
|
exit(1);
|
|
}
|
|
if (ioctl(fd, SLIOCGUNIT, (caddr_t)&unitnum) < 0) {
|
|
perror("ioctl(SLIOCGUNIT)");
|
|
syslog(LOG_ERR, "ioctl(SLIOCGUNIT): %m");
|
|
exit(1);
|
|
}
|
|
sprintf(unitname, "sl%d", unitnum);
|
|
if (first && debug == 0) {
|
|
close(0);
|
|
close(1);
|
|
close(2);
|
|
(void) open("/dev/null", O_RDWR);
|
|
(void) dup2(0, 1);
|
|
(void) dup2(0, 2);
|
|
}
|
|
|
|
sprintf(buf, "%s %s up", upscript ? upscript : "ifconfig" , unitname);
|
|
(void) system(buf);
|
|
|
|
printd(", ready\n");
|
|
if (!first)
|
|
syslog(LOG_INFO, "reconnected on %s (%d tries).\n", unitname, tries);
|
|
first = 0;
|
|
tries = 0;
|
|
logged_in = 1;
|
|
while (hup == 0) {
|
|
sigpause(0L);
|
|
printd("sigpause return\n");
|
|
}
|
|
goto restart;
|
|
}
|
|
|
|
void
|
|
sighup()
|
|
{
|
|
|
|
printd("hup\n");
|
|
if (hup == 0 && logged_in)
|
|
syslog(LOG_INFO, "hangup signal\n");
|
|
hup = 1;
|
|
}
|
|
|
|
getline(buf, size, fd, timeout)
|
|
char *buf;
|
|
int size, fd, timeout;
|
|
{
|
|
register int i;
|
|
int ret;
|
|
fd_set readfds;
|
|
struct timeval tv;
|
|
|
|
size--;
|
|
for (i = 0; i < size; i++) {
|
|
if (hup)
|
|
return (0);
|
|
FD_ZERO(&readfds);
|
|
FD_SET(fd, &readfds);
|
|
tv.tv_sec = timeout;
|
|
tv.tv_usec = 0;
|
|
if ((ret = select(fd + 1, &readfds, NULL, NULL, &tv)) < 0) {
|
|
if (errno != EINTR)
|
|
perror("getline: select");
|
|
} else {
|
|
if (! ret) {
|
|
printd("getline: timed out\n");
|
|
return (0);
|
|
}
|
|
if ((ret = read(fd, &buf[i], 1)) == 1) {
|
|
buf[i] &= 0177;
|
|
if (buf[i] == '\r' || buf[i] == '\0')
|
|
buf[i] = '\n';
|
|
if (buf[i] != '\n' && buf[i] != ':')
|
|
continue;
|
|
buf[i + 1] = '\0';
|
|
printd("Got %d: \"%s\"\n", i + 1, buf);
|
|
return (i+1);
|
|
}
|
|
if (ret <= 0) {
|
|
if (ret < 0) {
|
|
perror("getline: read");
|
|
} else
|
|
fprintf(stderr, "read returned 0\n");
|
|
buf[i] = '\0';
|
|
printd("returning 0 after %d: \"%s\"\n", i, buf);
|
|
return (0);
|
|
}
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr,
|
|
"usage: startslip [-d] [-b speed] [-s string] [-A annexname] [-F flowcontrol] [-U upscript] [-D downscript] dev user passwd\n");
|
|
exit(1);
|
|
}
|