*/
#ifndef lint
-static char rcsid[] = "$Id: main.c,v 1.24 1995/06/12 11:22:49 paulus Exp $";
+static char rcsid[] = "$Id: main.c,v 1.29 1995/12/18 03:50:17 paulus Exp $";
#endif
#include <stdio.h>
#include "pathnames.h"
#include "patchlevel.h"
+#ifdef IPX_CHANGE
+#include "ipxcp.h"
+#endif /* IPX_CHANGE */
+
/*
* If REQ_SYSOPTIONS is defined to 1, pppd will not run unless
* /etc/ppp/options exists.
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 */
+/* Prototypes for procedures local to this file. */
+
+static void cleanup __P((void));
+static void close_fd __P((void));
+static void get_input __P((void));
+static void connect_time_expired __P((caddr_t));
+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));
/*
* PPP Data Link Layer "protocol" table.
* One entry per supported protocol.
+ * The last entry must be NULL.
*/
-static struct protent {
- u_short protocol;
- void (*init)();
- void (*input)();
- void (*protrej)();
- int (*printpkt)();
- void (*datainput)();
- char *name;
-} prottbl[] = {
- { PPP_LCP, lcp_init, lcp_input, lcp_protrej,
- lcp_printpkt, NULL, "LCP" },
- { PPP_IPCP, ipcp_init, ipcp_input, ipcp_protrej,
- ipcp_printpkt, NULL, "IPCP" },
- { PPP_PAP, upap_init, upap_input, upap_protrej,
- upap_printpkt, NULL, "PAP" },
- { PPP_CHAP, ChapInit, ChapInput, ChapProtocolReject,
- ChapPrintPkt, NULL, "CHAP" },
- { PPP_CCP, ccp_init, ccp_input, ccp_protrej,
- ccp_printpkt, ccp_datainput, "CCP" },
+struct protent *protocols[] = {
+ &lcp_protent,
+ &pap_protent,
+ &chap_protent,
+ &ipcp_protent,
+ &ccp_protent,
+#ifdef IPX_CHANGE
+ &ipxcp_protent,
+#endif
+ NULL
};
-#define N_PROTO (sizeof(prottbl) / sizeof(prottbl[0]))
-
main(argc, argv)
int argc;
char *argv[];
{
- int i, nonblock;
+ int i, nonblock, fdflags;
struct sigaction sa;
struct cmd *cmdp;
FILE *pidfile;
struct passwd *pw;
struct timeval timo;
sigset_t mask;
+ struct protent *protp;
p = ttyname(0);
if (p)
uid = getuid();
- if (!ppp_available()) {
- fprintf(stderr, "Sorry - PPP is not available on this system\n");
- exit(1);
- }
-
/*
* Initialize to the standard option set, then parse, in order,
* the system options file, the user's options file, and the command
* line arguments.
*/
- for (i = 0; i < N_PROTO; i++)
- (*prottbl[i].init)(0);
+ for (i = 0; (protp = protocols[i]) != NULL; ++i)
+ (*protp->init)(0);
progname = *argv;
!parse_args(argc-1, argv+1) ||
!options_for_tty())
die(1);
+
+ if (!ppp_available()) {
+ fprintf(stderr, no_ppp_msg);
+ exit(1);
+ }
+
+#ifdef IPX_CHANGE
+ remove_sys_options();
+#endif /* IPX_CHANGE */
check_auth_options();
setipdefault();
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;
}
/*
- * Set device for non-blocking reads.
+ * Set a timeout to close the connection once the maximum
+ * connect time has expired.
*/
- if (fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
- syslog(LOG_ERR, "Couldn't set device to non-blocking mode: %m");
- die(1);
- }
-
+ if (maxconnect > 0)
+ TIMEOUT(connect_time_expired, 0, maxconnect);
+
/*
* 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);
+ lcp_close(0, "User request");
+ phase = PHASE_TERMINATE;
kill_link = 0;
}
if (open_ccp_flag) {
}
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);
int len, i;
u_char *p;
u_short protocol;
+ struct protent *protp;
p = inpacket_buf; /* point to beginning of packet buffer */
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++) {
- if (prottbl[i].protocol == protocol) {
- (*prottbl[i].input)(0, p, len);
+ for (i = 0; (protp = protocols[i]) != NULL; ++i) {
+ if (protp->protocol == protocol && protp->enabled_flag) {
+ (*protp->input)(0, p, len);
return;
}
- if (protocol == (prottbl[i].protocol & ~0x8000)
- && prottbl[i].datainput != NULL) {
- (*prottbl[i].datainput)(0, p, len);
+ if (protocol == (protp->protocol & ~0x8000) && protp->enabled_flag
+ && protp->datainput != NULL) {
+ (*protp->datainput)(0, p, len);
return;
}
}
if (debug)
- syslog(LOG_WARNING, "Unknown protocol (0x%x) received", protocol);
+ syslog(LOG_WARNING, "Unsupported protocol (0x%x) received", protocol);
lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN);
}
/*
- * demuxprotrej - Demultiplex a Protocol-Reject.
- */
-void
-demuxprotrej(unit, protocol)
- int unit;
- u_short protocol;
-{
- int i;
-
- /*
- * Upcall the proper Protocol-Reject routine.
- */
- for (i = 0; i < sizeof (prottbl) / sizeof (struct protent); i++)
- if (prottbl[i].protocol == protocol) {
- (*prottbl[i].protrej)(unit);
- return;
- }
-
- syslog(LOG_WARNING,
- "demuxprotrej: 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);
}
+/*
+ * connect_time_expired - log a message and close the connection.
+ */
+static void
+connect_time_expired(arg)
+ caddr_t arg;
+{
+ syslog(LOG_INFO, "Connect time expired");
+
+ phase = PHASE_TERMINATE;
+ lcp_close(0, "Connect time expired"); /* Close connection */
+}
+
/*
* 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();
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;
-
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;
* reap_kids - get status from any dead child processes,
* and log a message for abnormal terminations.
*/
-void
+static void
reap_kids()
{
int pid, status;
int i, n;
u_short proto;
u_char x;
+ struct protent *protp;
if (len >= PPP_HDRLEN && p[0] == PPP_ALLSTATIONS && p[1] == PPP_UI) {
p += 2;
GETSHORT(proto, p);
len -= PPP_HDRLEN;
- for (i = 0; i < N_PROTO; ++i)
- if (proto == prottbl[i].protocol)
+ for (i = 0; (protp = protocols[i]) != NULL; ++i)
+ if (proto == protp->protocol)
break;
- if (i < N_PROTO) {
- printer(arg, "[%s", prottbl[i].name);
- n = (*prottbl[i].printpkt)(p, len, printer, arg);
+ if (protp != NULL) {
+ printer(arg, "[%s", protp->name);
+ n = (*protp->printpkt)(p, len, printer, arg);
printer(arg, "]");
p += n;
len -= n;
#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