* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static char rcsid[] = "$Id: main.c,v 1.80 1999/07/21 00:24:31 paulus Exp $";
-#endif
+#define RCSID "$Id: main.c,v 1.88 1999/12/23 01:28:27 paulus Exp $"
#include <stdio.h>
#include <ctype.h>
#include "fsm.h"
#include "lcp.h"
#include "ipcp.h"
+#ifdef INET6
+#include "ipv6cp.h"
+#endif
#include "upap.h"
#include "chap.h"
#include "ccp.h"
#include "atcp.h"
#endif
+static const char rcsid[] = RCSID;
+
/* interface vars */
char ifname[32]; /* Interface name */
int ifunit; /* Interface unit number */
char *progname; /* Name of this program */
char hostname[MAXNAMELEN]; /* Our hostname */
static char pidfilename[MAXPATHLEN]; /* name of pid file */
+static char linkpidfile[MAXPATHLEN]; /* name of linkname pid file */
static char ppp_devnam[MAXPATHLEN]; /* name of PPP tty (maybe ttypx) */
static uid_t uid; /* Our real user-id */
static int conn_running; /* we have a [dis]connector running */
int prepass = 0; /* doing prepass to find device name */
int devnam_fixed; /* set while in options.ttyxx file */
volatile int status; /* exit status for pppd */
+int unsuccess; /* # unsuccessful connection attempts */
+int do_callback; /* != 0 if we should do callback next */
+int doing_callback; /* != 0 if we are doing callback */
+
+int (*holdoff_hook) __P((void)) = NULL;
+int (*new_phase_hook) __P((int)) = NULL;
static int fd_ppp = -1; /* fd for talking PPP */
static int fd_loop; /* fd for getting demand-dial packets */
/* Prototypes for procedures local to this file. */
static void create_pidfile __P((void));
+static void create_linkpidfile __P((void));
static void cleanup __P((void));
static void close_tty __P((void));
static void get_input __P((void));
static void bad_signal __P((int));
static void holdoff_end __P((void *));
static int device_script __P((char *, int, int, int));
-static void reap_kids __P((int waitfor));
+static int reap_kids __P((int waitfor));
static void record_child __P((int, char *, void (*) (void *), void *));
static int start_charshunt __P((int, int));
static void charshunt_done __P((void *));
&cbcp_protent,
#endif
&ipcp_protent,
+#ifdef INET6
+ &ipv6cp_protent,
+#endif
&ccp_protent,
#ifdef IPX_CHANGE
&ipxcp_protent,
int argc;
char *argv[];
{
- int i, fdflags;
+ int i, fdflags, t;
struct sigaction sa;
char *p;
struct passwd *pw;
struct stat statbuf;
char numbuf[16];
- phase = PHASE_INITIALIZE;
+ new_phase(PHASE_INITIALIZE);
/*
* Ensure that fds 0, 1, 2 are open, to /dev/null if nowhere else.
}
hostname[MAXNAMELEN-1] = 0;
+ /* make sure we don't create world or group writable files. */
+ umask(umask(0777) | 022);
+
uid = getuid();
privileged = uid == 0;
slprintf(numbuf, sizeof(numbuf), "%d", uid);
ngroups = getgroups(NGROUPS_MAX, groups);
+ /*
+ * Initialize magic number generator now so that protocols may
+ * use magic numbers in initialization.
+ */
+ magic_init();
+
/*
* Initialize to the standard option set, then parse, in order,
* the system options file, the user's options file,
for (i = 0; (protp = protocols[i]) != NULL; ++i)
if (protp->check_options != NULL)
(*protp->check_options)();
- if (demand && connector == 0) {
+ if (demand && connect_script == 0) {
option_error("connect script is required for demand-dialling\n");
exit(EXIT_OPTION_ERROR);
}
+ /* default holdoff to 0 if no connect script has been given */
+ if (connect_script == 0 && !holdoff_specified)
+ holdoff = 0;
if (using_pty) {
if (!default_device) {
script_setenv("DEVICE", devnam);
/*
- * Initialize system-dependent stuff and magic number package.
+ * Initialize system-dependent stuff.
*/
sys_init();
- magic_init();
if (debug)
setlogmask(LOG_UPTO(LOG_DEBUG));
waiting = 0;
+ create_linkpidfile();
+
/*
* If we're doing dial-on-demand, set up the interface now.
*/
demand_conf();
}
+ do_callback = 0;
for (;;) {
need_holdoff = 1;
ttyfd = -1;
real_ttyfd = -1;
status = EXIT_OK;
+ ++unsuccess;
+ doing_callback = do_callback;
+ do_callback = 0;
- if (demand) {
+ if (demand && !doing_callback) {
/*
* Don't do anything until we see some activity.
*/
kill_link = 0;
- phase = PHASE_DORMANT;
+ new_phase(PHASE_DORMANT);
demand_unblock();
add_fd(fd_loop);
for (;;) {
info("Starting link");
}
- phase = PHASE_SERIALCONN;
+ new_phase(PHASE_SERIALCONN);
/*
* Get a pty master/slave pair if the pty, notty, or record
*/
hungup = 0;
kill_link = 0;
+ connector = doing_callback? callback_script: connect_script;
if (devnam[0] != 0) {
for (;;) {
/* If the user specified the device name, become the
/* run connection script */
if ((connector && connector[0]) || initializer) {
if (real_ttyfd != -1) {
+ /* XXX do this if doing_callback == CALLBACK_DIALIN? */
if (!default_device && modem) {
setdtr(real_ttyfd, 0); /* in case modem is off hook */
sleep(1);
clear CLOCAL if modem option */
if (real_ttyfd != -1)
set_up_tty(real_ttyfd, 0);
+
+ if (doing_callback == CALLBACK_DIALIN)
+ connector = NULL;
}
/* reopen tty if necessary to wait for carrier */
* time for something from the peer. This can avoid bouncing
* our packets off his tty before he has it set up.
*/
- if (connector != NULL || ptycommand != NULL) {
+ add_fd(fd_ppp);
+ if (connect_delay != 0 && (connector != NULL || ptycommand != NULL)) {
struct timeval t;
- t.tv_sec = 1;
- t.tv_usec = 0;
+ t.tv_sec = connect_delay / 1000;
+ t.tv_usec = connect_delay % 1000;
wait_input(&t);
}
lcp_open(0); /* Start protocol */
open_ccp_flag = 0;
- add_fd(fd_ppp);
status = EXIT_NEGOTIATION_FAILED;
- for (phase = PHASE_ESTABLISH; phase != PHASE_DEAD; ) {
+ new_phase(PHASE_ESTABLISH);
+ while (phase != PHASE_DEAD) {
if (sigsetjmp(sigjmp, 1) == 0) {
sigprocmask(SIG_BLOCK, &mask, NULL);
if (kill_link || open_ccp_flag || got_sigchld) {
kill_link = 0;
}
if (open_ccp_flag) {
- if (phase == PHASE_NETWORK) {
+ if (phase == PHASE_NETWORK || phase == PHASE_RUNNING) {
ccp_fsm[0].flags = OPT_RESTART; /* clears OPT_SILENT */
(*ccp_protent.open)(0);
}
link_stats.bytes_out, link_stats.bytes_in);
}
+ /*
+ * Delete pid file before disestablishing ppp. Otherwise it
+ * can happen that another pppd gets the same unit and then
+ * we delete its pid file.
+ */
+ if (!demand) {
+ if (pidfilename[0] != 0
+ && unlink(pidfilename) < 0 && errno != ENOENT)
+ warn("unable to delete pid file %s: %m", pidfilename);
+ pidfilename[0] = 0;
+ }
+
/*
* If we may want to bring the link up again, transfer
* the ppp unit back to the loopback. Set the
* XXX we may not be able to do this if the line has hung up!
*/
disconnect:
- if (disconnector && !hungup) {
+ if (disconnect_script && !hungup) {
+ new_phase(PHASE_DISCONNECT);
if (real_ttyfd >= 0)
set_up_tty(real_ttyfd, 1);
- if (device_script(disconnector, ttyfd, ttyfd, 0) < 0) {
+ if (device_script(disconnect_script, ttyfd, ttyfd, 0) < 0) {
warn("disconnect script failed");
} else {
info("Serial link disconnected.");
if (!demand) {
if (pidfilename[0] != 0
&& unlink(pidfilename) < 0 && errno != ENOENT)
- warn("unable to delete pid file: %m");
+ warn("unable to delete pid file %s: %m", pidfilename);
pidfilename[0] = 0;
}
- if (!persist)
+ if (!persist || (maxfail > 0 && unsuccess >= maxfail))
break;
kill_link = 0;
if (demand)
demand_discard();
- if (holdoff > 0 && need_holdoff) {
- phase = PHASE_HOLDOFF;
- TIMEOUT(holdoff_end, NULL, holdoff);
+ t = need_holdoff? holdoff: 0;
+ if (holdoff_hook)
+ t = (*holdoff_hook)();
+ if (t > 0) {
+ new_phase(PHASE_HOLDOFF);
+ TIMEOUT(holdoff_end, NULL, t);
do {
if (sigsetjmp(sigjmp, 1) == 0) {
sigprocmask(SIG_BLOCK, &mask, NULL);
calltimeout();
if (kill_link) {
kill_link = 0;
- phase = PHASE_DORMANT; /* allow signal to end holdoff */
+ new_phase(PHASE_DORMANT); /* allow signal to end holdoff */
}
if (got_sigchld)
reap_kids(0);
for (chp = children; chp != NULL; chp = chp->next)
dbglog(" script %s, pid %d", chp->prog, chp->pid);
}
- reap_kids(1);
+ if (reap_kids(1) < 0)
+ break;
}
die(status);
close(2);
detached = 1;
log_to_fd = -1;
- /* update pid file if it has been written already */
+ /* update pid files if they have been written already */
if (pidfilename[0])
create_pidfile();
+ if (linkpidfile[0])
+ create_linkpidfile();
}
/*
}
slprintf(numbuf, sizeof(numbuf), "%d", getpid());
script_setenv("PPPD_PID", numbuf);
+ if (linkpidfile[0])
+ create_linkpidfile();
+}
+
+static void
+create_linkpidfile()
+{
+ FILE *pidfile;
+
+ if (linkname[0] == 0)
+ return;
+ slprintf(linkpidfile, sizeof(linkpidfile), "%sppp-%s.pid",
+ _PATH_VARRUN, linkname);
+ if ((pidfile = fopen(linkpidfile, "w")) != NULL) {
+ fprintf(pidfile, "%d\n", getpid());
+ if (pidfilename[0])
+ fprintf(pidfile, "%s\n", ifname);
+ (void) fclose(pidfile);
+ } else {
+ error("Failed to create pid file %s: %m", linkpidfile);
+ linkpidfile[0] = 0;
+ }
+ script_setenv("LINKNAME", linkname);
}
/*
holdoff_end(arg)
void *arg;
{
- phase = PHASE_DORMANT;
+ new_phase(PHASE_DORMANT);
+}
+
+/* List of protocol names, to make our messages a little more informative. */
+struct protocol_list {
+ u_short proto;
+ const char *name;
+} protocol_list[] = {
+ { 0x21, "IP" },
+ { 0x23, "OSI Network Layer" },
+ { 0x25, "Xerox NS IDP" },
+ { 0x27, "DECnet Phase IV" },
+ { 0x29, "Appletalk" },
+ { 0x2b, "Novell IPX" },
+ { 0x2d, "VJ compressed TCP/IP" },
+ { 0x2f, "VJ uncompressed TCP/IP" },
+ { 0x31, "Bridging PDU" },
+ { 0x33, "Stream Protocol ST-II" },
+ { 0x35, "Banyan Vines" },
+ { 0x39, "AppleTalk EDDP" },
+ { 0x3b, "AppleTalk SmartBuffered" },
+ { 0x3d, "Multi-Link" },
+ { 0x3f, "NETBIOS Framing" },
+ { 0x41, "Cisco Systems" },
+ { 0x43, "Ascom Timeplex" },
+ { 0x45, "Fujitsu Link Backup and Load Balancing (LBLB)" },
+ { 0x47, "DCA Remote Lan" },
+ { 0x49, "Serial Data Transport Protocol (PPP-SDTP)" },
+ { 0x4b, "SNA over 802.2" },
+ { 0x4d, "SNA" },
+ { 0x4f, "IP6 Header Compression" },
+ { 0x6f, "Stampede Bridging" },
+ { 0xfb, "single-link compression" },
+ { 0xfd, "1st choice compression" },
+ { 0x0201, "802.1d Hello Packets" },
+ { 0x0203, "IBM Source Routing BPDU" },
+ { 0x0205, "DEC LANBridge100 Spanning Tree" },
+ { 0x0231, "Luxcom" },
+ { 0x0233, "Sigma Network Systems" },
+ { 0x8021, "Internet Protocol Control Protocol" },
+ { 0x8023, "OSI Network Layer Control Protocol" },
+ { 0x8025, "Xerox NS IDP Control Protocol" },
+ { 0x8027, "DECnet Phase IV Control Protocol" },
+ { 0x8029, "Appletalk Control Protocol" },
+ { 0x802b, "Novell IPX Control Protocol" },
+ { 0x8031, "Bridging NCP" },
+ { 0x8033, "Stream Protocol Control Protocol" },
+ { 0x8035, "Banyan Vines Control Protocol" },
+ { 0x803d, "Multi-Link Control Protocol" },
+ { 0x803f, "NETBIOS Framing Control Protocol" },
+ { 0x8041, "Cisco Systems Control Protocol" },
+ { 0x8043, "Ascom Timeplex" },
+ { 0x8045, "Fujitsu LBLB Control Protocol" },
+ { 0x8047, "DCA Remote Lan Network Control Protocol (RLNCP)" },
+ { 0x8049, "Serial Data Control Protocol (PPP-SDCP)" },
+ { 0x804b, "SNA over 802.2 Control Protocol" },
+ { 0x804d, "SNA Control Protocol" },
+ { 0x804f, "IP6 Header Compression Control Protocol" },
+ { 0x006f, "Stampede Bridging Control Protocol" },
+ { 0x80fb, "Single Link Compression Control Protocol" },
+ { 0x80fd, "Compression Control Protocol" },
+ { 0xc021, "Link Control Protocol" },
+ { 0xc023, "Password Authentication Protocol" },
+ { 0xc025, "Link Quality Report" },
+ { 0xc027, "Shiva Password Authentication Protocol" },
+ { 0xc029, "CallBack Control Protocol (CBCP)" },
+ { 0xc081, "Container Control Protocol" },
+ { 0xc223, "Challenge Handshake Authentication Protocol" },
+ { 0xc281, "Proprietary Authentication Protocol" },
+ { 0, NULL },
+};
+
+/*
+ * protocol_name - find a name for a PPP protocol.
+ */
+const char *
+protocol_name(proto)
+ int proto;
+{
+ struct protocol_list *lp;
+
+ for (lp = protocol_list; lp->proto != 0; ++lp)
+ if (proto == lp->proto)
+ return lp->name;
+ return NULL;
}
/*
}
}
- if (debug)
- warn("Unsupported protocol (0x%x) received", protocol);
+ if (debug) {
+ const char *pname = protocol_name(protocol);
+ if (pname != NULL)
+ warn("Unsupported protocol '%s' (0x%x) received", pname, protocol);
+ else
+ warn("Unsupported protocol 0x%x received", protocol);
+ }
lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN);
}
+/*
+ * new_phase - signal the start of a new phase of pppd's operation.
+ */
+void
+new_phase(p)
+ int p;
+{
+ phase = p;
+ if (new_phase_hook)
+ (*new_phase_hook)(p);
+}
/*
* die - clean up state and exit with the specified status.
close_tty();
if (pidfilename[0] != 0 && unlink(pidfilename) < 0 && errno != ENOENT)
- warn("unable to delete pid file: %m");
+ warn("unable to delete pid file %s: %m", pidfilename);
pidfilename[0] = 0;
+ if (linkpidfile[0] != 0 && unlink(linkpidfile) < 0 && errno != ENOENT)
+ warn("unable to delete pid file %s: %m", linkpidfile);
+ linkpidfile[0] = 0;
if (locked)
unlock();
for (copp = &callout; (freep = *copp); copp = &freep->c_next)
if (freep->c_func == func && freep->c_arg == arg) {
*copp = freep->c_next;
- (void) free((char *) freep);
+ free((char *) freep);
break;
}
}
* reap_kids - get status from any dead child processes,
* and log a message for abnormal terminations.
*/
-static void
+static int
reap_kids(waitfor)
int waitfor;
{
got_sigchld = 0;
if (n_children == 0)
- return;
+ return 0;
while ((pid = waitpid(-1, &status, (waitfor? 0: WNOHANG))) != -1
&& pid != 0) {
--n_children;
if (chp)
free(chp);
}
- if (pid == -1 && errno != ECHILD && errno != EINTR)
- error("Error waiting for child process: %m");
+ if (pid == -1) {
+ if (errno == ECHILD)
+ return -1;
+ if (errno != EINTR)
+ error("Error waiting for child process: %m");
+ }
+ return 0;
}
}
}
} else {
+ /* no space allocated for script env. ptrs. yet */
i = 0;
script_env = (char **) malloc(16 * sizeof(char *));
if (script_env == 0)
projects / ppp.git / blobdiff