*/
#ifndef lint
-static char rcsid[] = "$Id: main.c,v 1.22 1995/05/01 01:44:30 paulus Exp $";
+static char rcsid[] = "$Id: main.c,v 1.28 1995/10/27 03:41:01 paulus Exp $";
#endif
#include <stdio.h>
int kill_link;
int open_ccp_flag;
-static int initfdflags = -1; /* Initial file descriptor flags */
-
u_char outpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for outgoing packet */
static u_char inpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for incoming packet */
int hungup; /* terminal has been hung up */
static int n_children; /* # child processes still running */
-int baud_rate;
+int baud_rate; /* Actual bits/second for serial device */
+
+char *no_ppp_msg = "Sorry - this system lacks PPP kernel support\n";
+
+/* Prototypes for procedures local to this file. */
-/* prototypes */
+static void cleanup __P((void));
+static void close_fd __P((void));
+static void get_input __P((void));
+static void calltimeout __P((void));
+static struct timeval *timeleft __P((struct timeval *));
static void hup __P((int));
static void term __P((int));
static void chld __P((int));
static void toggle_debug __P((int));
static void open_ccp __P((int));
-
-static void get_input __P((void));
-void establish_ppp __P((void));
-void calltimeout __P((void));
-struct timeval *timeleft __P((struct timeval *));
-void reap_kids __P((void));
-void cleanup __P((int, caddr_t));
-void close_fd __P((void));
-void die __P((int));
-void novm __P((char *));
-
-void log_packet __P((u_char *, int, char *));
-void format_packet __P((u_char *, int,
- void (*) (void *, char *, ...), void *));
-void pr_log __P((void *, char *, ...));
+static void bad_signal __P((int));
+static int device_script __P((char *, int, int));
+static void reap_kids __P((void));
+static void pr_log __P((void *, char *, ...));
extern char *ttyname __P((int));
extern char *getlogin __P((void));
int argc;
char *argv[];
{
- int i, nonblock;
+ int i, nonblock, fdflags;
struct sigaction sa;
struct cmd *cmdp;
FILE *pidfile;
uid = getuid();
if (!ppp_available()) {
- fprintf(stderr, "Sorry - PPP is not available on this system\n");
+ fprintf(stderr, no_ppp_msg);
exit(1);
}
SIGNAL(SIGTERM, term); /* Terminate */
SIGNAL(SIGCHLD, chld);
- signal(SIGUSR1, toggle_debug); /* Toggle debug flag */
- signal(SIGUSR2, open_ccp); /* Reopen CCP */
+ SIGNAL(SIGUSR1, toggle_debug); /* Toggle debug flag */
+ SIGNAL(SIGUSR2, open_ccp); /* Reopen CCP */
+
+ /*
+ * Install a handler for other signals which would otherwise
+ * cause pppd to exit without cleaning up.
+ */
+ SIGNAL(SIGABRT, bad_signal);
+ SIGNAL(SIGALRM, bad_signal);
+ SIGNAL(SIGFPE, bad_signal);
+ SIGNAL(SIGILL, bad_signal);
+ SIGNAL(SIGPIPE, bad_signal);
+ SIGNAL(SIGQUIT, bad_signal);
+ SIGNAL(SIGSEGV, bad_signal);
+#ifdef SIGBUS
+ SIGNAL(SIGBUS, bad_signal);
+#endif
+#ifdef SIGEMT
+ SIGNAL(SIGEMT, bad_signal);
+#endif
+#ifdef SIGPOLL
+ SIGNAL(SIGPOLL, bad_signal);
+#endif
+#ifdef SIGPROF
+ SIGNAL(SIGPROF, bad_signal);
+#endif
+#ifdef SIGSYS
+ SIGNAL(SIGSYS, bad_signal);
+#endif
+#ifdef SIGTRAP
+ SIGNAL(SIGTRAP, bad_signal);
+#endif
+#ifdef SIGVTALRM
+ SIGNAL(SIGVTALRM, bad_signal);
+#endif
+#ifdef SIGXCPU
+ SIGNAL(SIGXCPU, bad_signal);
+#endif
+#ifdef SIGXFSZ
+ SIGNAL(SIGXFSZ, bad_signal);
+#endif
/*
* Lock the device if we've been asked to.
syslog(LOG_ERR, "Failed to open %s: %m", devnam);
die(1);
}
- if ((initfdflags = fcntl(fd, F_GETFL)) == -1) {
- syslog(LOG_ERR, "Couldn't get device fd flags: %m");
- die(1);
- }
if (nonblock) {
- initfdflags &= ~O_NONBLOCK;
- fcntl(fd, F_SETFL, initfdflags);
+ if ((fdflags = fcntl(fd, F_GETFL)) == -1
+ || fcntl(fd, F_SETFL, fdflags & ~O_NONBLOCK) < 0)
+ syslog(LOG_WARNING,
+ "Couldn't reset non-blocking mode on device: %m");
}
hungup = 0;
kill_link = 0;
die(1);
}
- syslog(LOG_INFO, "Connected...");
+ syslog(LOG_INFO, "Serial connection established.");
sleep(1); /* give it time to set up its terminal */
}
-
+
/* set line speed, flow control, etc.; clear CLOCAL if modem option */
set_up_tty(fd, 0);
pidfilename[0] = 0;
}
- /*
- * Set device for non-blocking reads.
- */
- if (fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
- syslog(LOG_ERR, "Couldn't set device to non-blocking mode: %m");
- die(1);
- }
-
/*
* Block all signals, start opening the connection, and wait for
* incoming events (reply, timeout, etc.).
for (phase = PHASE_ESTABLISH; phase != PHASE_DEAD; ) {
wait_input(timeleft(&timo));
calltimeout();
+ get_input();
if (kill_link) {
lcp_close(0);
kill_link = 0;
}
open_ccp_flag = 0;
}
- get_input();
reap_kids(); /* Don't leave dead kids lying around */
}
/*
* Run disconnector script, if requested.
- * First we need to reset non-blocking mode.
+ * XXX we may not be able to do this if the line has hung up!
*/
- if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) >= 0)
- initfdflags = -1;
disestablish_ppp();
if (disconnector) {
set_up_tty(fd, 1);
if (device_script(disconnector, fd, fd) < 0) {
syslog(LOG_WARNING, "disconnect script failed");
- die(1);
+ } else {
+ syslog(LOG_INFO, "Serial link disconnected.");
}
-
- syslog(LOG_INFO, "Disconnected...");
}
close_fd();
} while (persist);
- if (lockflag && !default_device)
- unlock();
-
- exit(0);
+ die(0);
}
return;
if (len == 0) {
- MAINDEBUG((LOG_DEBUG, "End of file on fd!"));
+ syslog(LOG_NOTICE, "Modem hangup");
hungup = 1;
lcp_lowerdown(0); /* serial link is no longer available */
- phase = PHASE_DEAD;
+ link_terminated(0);
return;
}
/*
* Upcall the proper protocol input routine.
*/
- for (i = 0; i < sizeof (prottbl) / sizeof (struct protent); i++)
+ for (i = 0; i < sizeof (prottbl) / sizeof (struct protent); i++) {
if (prottbl[i].protocol == protocol) {
(*prottbl[i].input)(0, p, len);
- break;
- } else if (protocol == (prottbl[i].protocol & ~0x8000)
- && prottbl[i].datainput != NULL) {
+ return;
+ }
+ if (protocol == (prottbl[i].protocol & ~0x8000)
+ && prottbl[i].datainput != NULL) {
(*prottbl[i].datainput)(0, p, len);
- break;
+ return;
}
-
- if (i == sizeof (prottbl) / sizeof (struct protent)) {
- if (debug)
- syslog(LOG_WARNING, "Unknown protocol (0x%x) received", protocol);
- lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN);
}
+
+ if (debug)
+ syslog(LOG_WARNING, "Unknown protocol (0x%x) received", protocol);
+ lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN);
}
return;
}
- syslog(LOG_WARNING,
- "demuxprotrej: Unrecognized Protocol-Reject for protocol 0x%x",
+ syslog(LOG_WARNING, "Unrecognized Protocol-Reject for protocol 0x%x",
protocol);
}
/*
- * quit - Clean up state and exit.
+ * quit - Clean up state and exit (with an error indication).
*/
void
quit()
{
- die(0);
+ die(1);
}
/*
die(status)
int status;
{
- cleanup(0, NULL);
+ cleanup();
syslog(LOG_INFO, "Exit.");
exit(status);
}
* cleanup - restore anything which needs to be restored before we exit
*/
/* ARGSUSED */
-void
-cleanup(status, arg)
- int status;
- caddr_t arg;
+static void
+cleanup()
{
+ sys_cleanup();
+
if (fd >= 0)
close_fd();
/*
* close_fd - restore the terminal device and close it.
*/
-void
+static void
close_fd()
{
+ disestablish_ppp();
+
/* drop dtr to hang up */
if (modem)
setdtr(fd, FALSE);
- if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
- syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
- initfdflags = -1;
-
- disestablish_ppp();
-
restore_tty();
close(fd);
/*
* calltimeout - Call any timeout routines which are now due.
*/
-void
+static void
calltimeout()
{
struct callout *p;
/*
* timeleft - return the length of time until the next timeout is due.
*/
-struct timeval *
+static struct timeval *
timeleft(tvp)
struct timeval *tvp;
{
}
+/*
+ * bad_signal - We've caught a fatal signal. Clean up state and exit.
+ */
+static void
+bad_signal(sig)
+ int sig;
+{
+ syslog(LOG_ERR, "Fatal signal %d", sig);
+ die(1);
+}
+
+
/*
* device_script - run a program to connect or disconnect the
* serial device.
*/
-int
+static int
device_script(program, in, out)
char *program;
int in, out;
{
int pid;
int status;
+ int errfd;
pid = fork();
}
if (pid == 0) {
- setuid(getuid());
- setgid(getgid());
dup2(in, 0);
dup2(out, 1);
+ errfd = open(_PATH_CONNERRS, O_WRONLY | O_APPEND | O_CREAT, 0644);
+ if (errfd >= 0)
+ dup2(errfd, 2);
+ setuid(getuid());
+ setgid(getgid());
execl("/bin/sh", "sh", "-c", program, (char *)0);
syslog(LOG_ERR, "could not exec /bin/sh: %m");
_exit(99);
* reap_kids - get status from any dead child processes,
* and log a message for abnormal terminations.
*/
-void
+static void
reap_kids()
{
int pid, status;
#ifdef __STDC__
#include <stdarg.h>
-void
+static void
pr_log(void *arg, char *fmt, ...)
{
int n;
#else /* __STDC__ */
#include <varargs.h>
-void
+static void
pr_log(arg, fmt, va_alist)
void *arg;
char *fmt;
projects / ppp.git / blobdiff