/*
* main.c - Point-to-Point Protocol main module
*
- * Copyright (c) 1989 Carnegie Mellon University.
- * All rights reserved.
+ * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
*
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by Carnegie Mellon University. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * 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. The name "Carnegie Mellon University" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For permission or any legal
+ * details, please contact
+ * Office of Technology Transfer
+ * Carnegie Mellon University
+ * 5000 Forbes Avenue
+ * Pittsburgh, PA 15213-3890
+ * (412) 268-4387, fax: (412) 268-7395
+ * tech-transfer@andrew.cmu.edu
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by Computing Services
+ * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
+ *
+ * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
+ * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Copyright (c) 1999-2004 Paul Mackerras. 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. The name(s) of the authors of this software must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission.
+ *
+ * 3. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by Paul Mackerras
+ * <paulus@samba.org>".
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
-#define RCSID "$Id: main.c,v 1.102 2001/02/22 03:10:57 paulus Exp $"
+#define RCSID "$Id: main.c,v 1.141 2004/11/04 10:02:26 paulus Exp $"
#include <stdio.h>
#include <ctype.h>
#include "ipv6cp.h"
#endif
#include "upap.h"
-#include "chap.h"
+#include "chap-new.h"
+#include "eap.h"
#include "ccp.h"
+#include "ecp.h"
#include "pathnames.h"
-#include "patchlevel.h"
+
+#ifdef USE_TDB
#include "tdb.h"
+#endif
#ifdef CBCP_SUPPORT
#include "cbcp.h"
char ifname[32]; /* Interface name */
int ifunit; /* Interface unit number */
+struct channel *the_channel;
+
char *progname; /* Name of this program */
char hostname[MAXNAMELEN]; /* Our hostname */
static char pidfilename[MAXPATHLEN]; /* name of pid file */
struct notifier *phasechange = NULL;
struct notifier *exitnotify = NULL;
struct notifier *sigreceived = NULL;
+struct notifier *fork_notifier = NULL;
int hungup; /* terminal has been hung up */
int privileged; /* we're running as real uid root */
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 ppp_session_number; /* Session number, for channels with such a
+ concept (eg PPPoE) */
+int childwait_done; /* have timed out waiting for children */
+
+#ifdef USE_TDB
TDB_CONTEXT *pppdb; /* database for storing status etc. */
+#endif
+
char db_key[32];
int (*holdoff_hook) __P((void)) = NULL;
int (*new_phase_hook) __P((int)) = NULL;
+void (*snoop_recv_hook) __P((unsigned char *p, int len)) = NULL;
+void (*snoop_send_hook) __P((unsigned char *p, int len)) = NULL;
static int conn_running; /* we have a [dis]connector running */
static int devfd; /* fd of underlying device */
static int fd_ppp = -1; /* fd for talking PPP */
static int fd_loop; /* fd for getting demand-dial packets */
+static int fd_devnull; /* fd for /dev/null */
int phase; /* where the link is at */
int kill_link;
int got_sigterm;
int got_sighup;
+static sigset_t signals_handled;
static int waiting;
static sigjmp_buf sigjmp;
static struct timeval start_time; /* Time when link was started. */
+static struct pppd_stats old_link_stats;
struct pppd_stats link_stats;
-int link_connect_time;
+unsigned link_connect_time;
int link_stats_valid;
+int error_count;
+
/*
* We maintain a list of child process pids and
* functions to call when they exit.
/* Prototypes for procedures local to this file. */
static void setup_signals __P((void));
-static void create_pidfile __P((void));
-static void create_linkpidfile __P((void));
+static void create_pidfile __P((int pid));
+static void create_linkpidfile __P((int pid));
static void cleanup __P((void));
static void get_input __P((void));
static void calltimeout __P((void));
static void open_ccp __P((int));
static void bad_signal __P((int));
static void holdoff_end __P((void *));
-static int reap_kids __P((int waitfor));
+static int reap_kids __P((void));
+static void childwait_end __P((void *));
+
+#ifdef USE_TDB
static void update_db_entry __P((void));
static void add_db_key __P((const char *));
static void delete_db_key __P((const char *));
static void cleanup_db __P((void));
+#endif
+
static void handle_events __P((void));
+void print_link_stats __P((void));
extern char *ttyname __P((int));
extern char *getlogin __P((void));
&ipv6cp_protent,
#endif
&ccp_protent,
+ &ecp_protent,
#ifdef IPX_CHANGE
&ipxcp_protent,
#endif
#ifdef AT_CHANGE
&atcp_protent,
#endif
+ &eap_protent,
NULL
};
struct protent *protp;
char numbuf[16];
+ link_stats_valid = 0;
new_phase(PHASE_INITIALIZE);
- /*
- * Ensure that fds 0, 1, 2 are open, to /dev/null if nowhere else.
- * This way we can close 0, 1, 2 in detach() without clobbering
- * a fd that we are using.
- */
- if ((i = open("/dev/null", O_RDWR)) >= 0) {
- while (0 <= i && i <= 2)
- i = dup(i);
- if (i >= 0)
- close(i);
- }
-
script_env = NULL;
/* Initialize syslog facilities */
*/
for (i = 0; (protp = protocols[i]) != NULL; ++i)
(*protp->init)(0);
+
+ /*
+ * Initialize the default channel.
+ */
tty_init();
progname = *argv;
* Work out the device name, if it hasn't already been specified,
* and parse the tty's options file.
*/
- tty_device_check();
+ if (the_channel->process_extra_options)
+ (*the_channel->process_extra_options)();
+
+ if (debug)
+ setlogmask(LOG_UPTO(LOG_DEBUG));
/*
* Check that we are running as root.
/*
* Check that the options given are valid and consistent.
*/
+ check_options();
if (!sys_check_options())
exit(EXIT_OPTION_ERROR);
auth_check_options();
for (i = 0; (protp = protocols[i]) != NULL; ++i)
if (protp->check_options != NULL)
(*protp->check_options)();
- tty_check_options();
+ if (the_channel->check_options)
+ (*the_channel->check_options)();
+
+
+ if (dump_options || dryrun) {
+ init_pr_log(NULL, LOG_INFO);
+ print_options(pr_log, NULL);
+ end_pr_log();
+ }
+
+ if (dryrun)
+ die(0);
/*
* Initialize system-dependent stuff.
*/
sys_init();
- if (debug)
- setlogmask(LOG_UPTO(LOG_DEBUG));
+ /* Make sure fds 0, 1, 2 are open to somewhere. */
+ fd_devnull = open(_PATH_DEVNULL, O_RDWR);
+ if (fd_devnull < 0)
+ fatal("Couldn't open %s: %m", _PATH_DEVNULL);
+ while (fd_devnull <= 2) {
+ i = dup(fd_devnull);
+ if (i < 0)
+ fatal("Critical shortage of file descriptors: dup failed: %m");
+ fd_devnull = i;
+ }
+
+#ifdef USE_TDB
pppdb = tdb_open(_PATH_PPPDB, 0, 0, O_RDWR|O_CREAT, 0644);
if (pppdb != NULL) {
slprintf(db_key, sizeof(db_key), "pppd%d", getpid());
multilink = 0;
}
}
+#endif
/*
* Detach ourselves from the terminal, if required,
else
p = "(unknown)";
}
- syslog(LOG_NOTICE, "pppd %s.%d%s started by %s, uid %d",
- VERSION, PATCHLEVEL, IMPLEMENTATION, p, uid);
+ syslog(LOG_NOTICE, "pppd %s started by %s, uid %d", VERSION, p, uid);
script_setenv("PPPLOGNAME", p, 0);
if (devnam[0])
waiting = 0;
- create_linkpidfile();
-
/*
* If we're doing dial-on-demand, set up the interface now.
*/
/*
* Open the loopback channel and set it up to be the ppp interface.
*/
+#ifdef USE_TDB
tdb_writelock(pppdb);
+#endif
fd_loop = open_ppp_loopback();
set_ifunit(1);
+#ifdef USE_TDB
tdb_writeunlock(pppdb);
-
+#endif
/*
* Configure the interface and mark it up, etc.
*/
demand_conf();
+ create_linkpidfile(getpid());
}
do_callback = 0;
new_phase(PHASE_SERIALCONN);
- devfd = connect_tty();
+ devfd = the_channel->connect();
if (devfd < 0)
goto fail;
/* set up the serial device as a ppp interface */
+#ifdef USE_TDB
tdb_writelock(pppdb);
- fd_ppp = establish_ppp(devfd);
+#endif
+ fd_ppp = the_channel->establish_ppp(devfd);
if (fd_ppp < 0) {
+#ifdef USE_TDB
tdb_writeunlock(pppdb);
+#endif
status = EXIT_FATAL_ERROR;
goto disconnect;
}
+ /* create the pid file, now that we've obtained a ppp interface */
+ if (!demand)
+ create_linkpidfile(getpid());
if (!demand && ifunit >= 0)
set_ifunit(1);
+#ifdef USE_TDB
tdb_writeunlock(pppdb);
+#endif
/*
* Start opening the connection and wait for
* incoming events (reply, timeout, etc.).
*/
- notice("Connect: %s <--> %s", ifname, ppp_devnam);
+ if (ifunit >= 0)
+ notice("Connect: %s <--> %s", ifname, ppp_devnam);
+ else
+ notice("Starting negotiation on %s", ppp_devnam);
gettimeofday(&start_time, NULL);
- link_stats_valid = 0;
script_unsetenv("CONNECT_TIME");
script_unsetenv("BYTES_SENT");
script_unsetenv("BYTES_RCVD");
}
}
- /*
- * Print connect time and statistics.
- */
- if (link_stats_valid) {
- int t = (link_connect_time + 5) / 6; /* 1/10ths of minutes */
- info("Connect time %d.%d minutes.", t/10, t%10);
- info("Sent %d bytes, received %d bytes.",
- link_stats.bytes_out, link_stats.bytes_in);
- }
+ print_link_stats();
/*
* Delete pid file before disestablishing ppp. Otherwise it
*/
if (!demand) {
if (pidfilename[0] != 0
- && unlink(pidfilename) < 0 && errno != ENOENT)
+ && unlink(pidfilename) < 0 && errno != ENOENT)
warn("unable to delete pid file %s: %m", pidfilename);
pidfilename[0] = 0;
}
*/
remove_fd(fd_ppp);
clean_check();
- if (demand)
- restore_loop();
- disestablish_ppp(devfd);
+ the_channel->disestablish_ppp(devfd);
fd_ppp = -1;
if (!hungup)
lcp_lowerdown(0);
*/
disconnect:
new_phase(PHASE_DISCONNECT);
- disconnect_tty();
+ if (the_channel->disconnect)
+ the_channel->disconnect();
fail:
- cleanup_tty();
+ if (the_channel->cleanup)
+ (*the_channel->cleanup)();
if (!demand) {
if (pidfilename[0] != 0
- && unlink(pidfilename) < 0 && errno != ENOENT)
+ && unlink(pidfilename) < 0 && errno != ENOENT)
warn("unable to delete pid file %s: %m", pidfilename);
pidfilename[0] = 0;
}
}
/* Wait for scripts to finish */
- /* XXX should have a timeout here */
- while (n_children > 0) {
+ reap_kids();
+ if (n_children > 0) {
+ if (child_wait > 0)
+ TIMEOUT(childwait_end, NULL, child_wait);
if (debug) {
struct subprocess *chp;
dbglog("Waiting for %d child processes...", n_children);
for (chp = children; chp != NULL; chp = chp->next)
dbglog(" script %s, pid %d", chp->prog, chp->pid);
}
- if (reap_kids(1) < 0)
- break;
+ while (n_children > 0 && !childwait_done) {
+ handle_events();
+ if (kill_link && !childwait_done)
+ childwait_end(NULL);
+ }
}
die(status);
handle_events()
{
struct timeval timo;
- sigset_t mask;
kill_link = open_ccp_flag = 0;
if (sigsetjmp(sigjmp, 1) == 0) {
- sigprocmask(SIG_BLOCK, &mask, NULL);
+ sigprocmask(SIG_BLOCK, &signals_handled, NULL);
if (got_sighup || got_sigterm || got_sigusr2 || got_sigchld) {
- sigprocmask(SIG_UNBLOCK, &mask, NULL);
+ sigprocmask(SIG_UNBLOCK, &signals_handled, NULL);
} else {
waiting = 1;
- sigprocmask(SIG_UNBLOCK, &mask, NULL);
+ sigprocmask(SIG_UNBLOCK, &signals_handled, NULL);
wait_input(timeleft(&timo));
}
}
waiting = 0;
calltimeout();
if (got_sighup) {
+ info("Hangup (SIGHUP)");
kill_link = 1;
got_sighup = 0;
if (status != EXIT_HANGUP)
status = EXIT_USER_REQUEST;
}
if (got_sigterm) {
+ info("Terminating on signal %d", got_sigterm);
kill_link = 1;
persist = 0;
status = EXIT_USER_REQUEST;
got_sigterm = 0;
}
if (got_sigchld) {
- reap_kids(0); /* Don't leave dead kids lying around */
got_sigchld = 0;
+ reap_kids(); /* Don't leave dead kids lying around */
}
if (got_sigusr2) {
open_ccp_flag = 1;
setup_signals()
{
struct sigaction sa;
- sigset_t mask;
/*
* Compute mask of all interesting signals and install signal handlers
* for each. Only one signal handler may be active at a time. Therefore,
* all other signals should be masked when any handler is executing.
*/
- sigemptyset(&mask);
- sigaddset(&mask, SIGHUP);
- sigaddset(&mask, SIGINT);
- sigaddset(&mask, SIGTERM);
- sigaddset(&mask, SIGCHLD);
- sigaddset(&mask, SIGUSR2);
+ sigemptyset(&signals_handled);
+ sigaddset(&signals_handled, SIGHUP);
+ sigaddset(&signals_handled, SIGINT);
+ sigaddset(&signals_handled, SIGTERM);
+ sigaddset(&signals_handled, SIGCHLD);
+ sigaddset(&signals_handled, SIGUSR2);
#define SIGNAL(s, handler) do { \
sa.sa_handler = handler; \
fatal("Couldn't establish signal handler (%d): %m", s); \
} while (0)
- sa.sa_mask = mask;
+ sa.sa_mask = signals_handled;
sa.sa_flags = 0;
SIGNAL(SIGHUP, hup); /* Hangup */
SIGNAL(SIGINT, term); /* Interrupt */
slprintf(ifname, sizeof(ifname), "%s%d", PPP_DRV_NAME, ifunit);
script_setenv("IFNAME", ifname, iskey);
if (iskey) {
- create_pidfile(); /* write pid to file */
- create_linkpidfile();
+ create_pidfile(getpid()); /* write pid to file */
+ create_linkpidfile(getpid());
}
}
{
int pid;
char numbuf[16];
+ int pipefd[2];
if (detached)
return;
+ if (pipe(pipefd) == -1)
+ pipefd[0] = pipefd[1] = -1;
if ((pid = fork()) < 0) {
error("Couldn't detach (fork failed: %m)");
die(1); /* or just return? */
if (pid != 0) {
/* parent */
notify(pidchange, pid);
+ /* update pid files if they have been written already */
+ if (pidfilename[0])
+ create_pidfile(pid);
+ if (linkpidfile[0])
+ create_linkpidfile(pid);
exit(0); /* parent dies */
}
setsid();
chdir("/");
- close(0);
- close(1);
- close(2);
+ dup2(fd_devnull, 0);
+ dup2(fd_devnull, 1);
+ dup2(fd_devnull, 2);
detached = 1;
- if (!log_to_file && !log_to_specific_fd)
+ if (log_default)
log_to_fd = -1;
- /* 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, 1);
+
+ /* wait for parent to finish updating pid & lock files and die */
+ close(pipefd[1]);
+ complete_read(pipefd[0], numbuf, 1);
+ close(pipefd[0]);
}
/*
* Create a file containing our process ID.
*/
static void
-create_pidfile()
+create_pidfile(pid)
+ int pid;
{
FILE *pidfile;
slprintf(pidfilename, sizeof(pidfilename), "%s%s.pid",
_PATH_VARRUN, ifname);
if ((pidfile = fopen(pidfilename, "w")) != NULL) {
- fprintf(pidfile, "%d\n", getpid());
+ fprintf(pidfile, "%d\n", pid);
(void) fclose(pidfile);
} else {
error("Failed to create pid file %s: %m", pidfilename);
}
static void
-create_linkpidfile()
+create_linkpidfile(pid)
+ int pid;
{
FILE *pidfile;
slprintf(linkpidfile, sizeof(linkpidfile), "%sppp-%s.pid",
_PATH_VARRUN, linkname);
if ((pidfile = fopen(linkpidfile, "w")) != NULL) {
- fprintf(pidfile, "%d\n", getpid());
+ fprintf(pidfile, "%d\n", pid);
if (ifname[0])
fprintf(pidfile, "%s\n", ifname);
(void) fclose(pidfile);
return;
}
- if (debug /*&& (debugflags & DBG_INPACKET)*/)
- dbglog("rcvd %P", p, len);
-
if (len < PPP_HDRLEN) {
- MAINDEBUG(("io(): Received short packet."));
+ dbglog("received short packet:%.*B", len, p);
return;
}
+ dump_packet("rcvd", p, len);
+ if (snoop_recv_hook) snoop_recv_hook(p, len);
+
p += 2; /* Skip address and control */
GETSHORT(protocol, p);
len -= PPP_HDRLEN;
* Toss all non-LCP packets unless LCP is OPEN.
*/
if (protocol != PPP_LCP && lcp_fsm[0].state != OPENED) {
- MAINDEBUG(("get_input: Received non-LCP packet when LCP not open."));
+ dbglog("Discarded non-LCP packet when LCP not open");
return;
}
*/
if (phase <= PHASE_AUTHENTICATE
&& !(protocol == PPP_LCP || protocol == PPP_LQR
- || protocol == PPP_PAP || protocol == PPP_CHAP)) {
- MAINDEBUG(("get_input: discarding proto 0x%x in phase %d",
- protocol, phase));
+ || protocol == PPP_PAP || protocol == PPP_CHAP ||
+ protocol == PPP_EAP)) {
+ dbglog("discarding proto 0x%x in phase %d",
+ protocol, phase);
return;
}
lcp_sprotrej(0, p - PPP_HDRLEN, len + PPP_HDRLEN);
}
+/*
+ * ppp_send_config - configure the transmit-side characteristics of
+ * the ppp interface. Returns -1, indicating an error, if the channel
+ * send_config procedure called error() (or incremented error_count
+ * itself), otherwise 0.
+ */
+int
+ppp_send_config(unit, mtu, accm, pcomp, accomp)
+ int unit, mtu;
+ u_int32_t accm;
+ int pcomp, accomp;
+{
+ int errs;
+
+ if (the_channel->send_config == NULL)
+ return 0;
+ errs = error_count;
+ (*the_channel->send_config)(mtu, accm, pcomp, accomp);
+ return (error_count != errs)? -1: 0;
+}
+
+/*
+ * ppp_recv_config - configure the receive-side characteristics of
+ * the ppp interface. Returns -1, indicating an error, if the channel
+ * recv_config procedure called error() (or incremented error_count
+ * itself), otherwise 0.
+ */
+int
+ppp_recv_config(unit, mru, accm, pcomp, accomp)
+ int unit, mru;
+ u_int32_t accm;
+ int pcomp, accomp;
+{
+ int errs;
+
+ if (the_channel->recv_config == NULL)
+ return 0;
+ errs = error_count;
+ (*the_channel->recv_config)(mru, accm, pcomp, accomp);
+ return (error_count != errs)? -1: 0;
+}
+
/*
* new_phase - signal the start of a new phase of pppd's operation.
*/
die(status)
int status;
{
+ print_link_stats();
cleanup();
notify(exitnotify, status);
syslog(LOG_INFO, "Exit.");
sys_cleanup();
if (fd_ppp >= 0)
- disestablish_ppp(devfd);
- cleanup_tty();
+ the_channel->disestablish_ppp(devfd);
+ if (the_channel->cleanup)
+ (*the_channel->cleanup)();
- if (pidfilename[0] != 0 && unlink(pidfilename) < 0 && errno != ENOENT)
+ if (pidfilename[0] != 0 && unlink(pidfilename) < 0 && errno != ENOENT)
warn("unable to delete pid file %s: %m", pidfilename);
pidfilename[0] = 0;
- if (linkpidfile[0] != 0 && unlink(linkpidfile) < 0 && errno != ENOENT)
+ if (linkpidfile[0] != 0 && unlink(linkpidfile) < 0 && errno != ENOENT)
warn("unable to delete pid file %s: %m", linkpidfile);
linkpidfile[0] = 0;
+#ifdef USE_TDB
if (pppdb != NULL)
cleanup_db();
+#endif
+
+}
+
+void
+print_link_stats()
+{
+ /*
+ * Print connect time and statistics.
+ */
+ if (link_stats_valid) {
+ int t = (link_connect_time + 5) / 6; /* 1/10ths of minutes */
+ info("Connect time %d.%d minutes.", t/10, t%10);
+ info("Sent %u bytes, received %u bytes.",
+ link_stats.bytes_out, link_stats.bytes_in);
+ link_stats_valid = 0;
+ }
+}
+
+/*
+ * reset_link_stats - "reset" stats when link goes up.
+ */
+void
+reset_link_stats(u)
+ int u;
+{
+ if (!get_ppp_stats(u, &old_link_stats))
+ return;
+ gettimeofday(&start_time, NULL);
}
/*
link_connect_time = now.tv_sec - start_time.tv_sec;
link_stats_valid = 1;
- slprintf(numbuf, sizeof(numbuf), "%d", link_connect_time);
+ link_stats.bytes_in -= old_link_stats.bytes_in;
+ link_stats.bytes_out -= old_link_stats.bytes_out;
+ link_stats.pkts_in -= old_link_stats.pkts_in;
+ link_stats.pkts_out -= old_link_stats.pkts_out;
+
+ slprintf(numbuf, sizeof(numbuf), "%u", link_connect_time);
script_setenv("CONNECT_TIME", numbuf, 0);
- slprintf(numbuf, sizeof(numbuf), "%d", link_stats.bytes_out);
+ slprintf(numbuf, sizeof(numbuf), "%u", link_stats.bytes_out);
script_setenv("BYTES_SENT", numbuf, 0);
- slprintf(numbuf, sizeof(numbuf), "%d", link_stats.bytes_in);
+ slprintf(numbuf, sizeof(numbuf), "%u", link_stats.bytes_in);
script_setenv("BYTES_RCVD", numbuf, 0);
}
/*
* timeout - Schedule a timeout.
- *
- * Note that this timeout takes the number of milliseconds, NOT hz (as in
- * the kernel).
*/
void
timeout(func, arg, secs, usecs)
int secs, usecs;
{
struct callout *newp, *p, **pp;
-
+
MAINDEBUG(("Timeout %p:%p in %d.%03d seconds.", func, arg,
- time / 1000, time % 1000));
-
+ secs, usecs/1000));
+
/*
* Allocate timeout.
*/
void *arg;
{
struct callout **copp, *freep;
-
+
MAINDEBUG(("Untimeout %p:%p.", func, arg));
-
+
/*
* Find first matching timeout and remove it from the list.
*/
/*
* kill_my_pg - send a signal to our process group, and ignore it ourselves.
+ * We assume that sig is currently blocked.
*/
static void
kill_my_pg(sig)
{
struct sigaction act, oldact;
+ sigemptyset(&act.sa_mask); /* unnecessary in fact */
act.sa_handler = SIG_IGN;
act.sa_flags = 0;
kill(0, sig);
+ /*
+ * The kill() above made the signal pending for us, as well as
+ * the rest of our process group, but we don't want it delivered
+ * to us. It is blocked at the moment. Setting it to be ignored
+ * will cause the pending signal to be discarded. If we did the
+ * kill() after setting the signal to be ignored, it is unspecified
+ * (by POSIX) whether the signal is immediately discarded or left
+ * pending, and in fact Linux would leave it pending, and so it
+ * would be delivered after the current signal handler exits,
+ * leading to an infinite loop.
+ */
sigaction(sig, &act, &oldact);
sigaction(sig, &oldact, NULL);
}
hup(sig)
int sig;
{
- info("Hangup (SIGHUP)");
+ /* can't log a message here, it can deadlock */
got_sighup = 1;
if (conn_running)
/* Send the signal to the [dis]connector process(es) also */
term(sig)
int sig;
{
- info("Terminating on signal %d.", sig);
- got_sigterm = 1;
+ /* can't log a message here, it can deadlock */
+ got_sigterm = sig;
if (conn_running)
/* Send the signal to the [dis]connector process(es) also */
kill_my_pg(sig);
die(127);
}
+/*
+ * safe_fork - Create a child process. The child closes all the
+ * file descriptors that we don't want to leak to a script.
+ * The parent waits for the child to do this before returning.
+ */
+pid_t
+safe_fork()
+{
+ pid_t pid;
+ int pipefd[2];
+ char buf[1];
+
+ if (pipe(pipefd) == -1)
+ pipefd[0] = pipefd[1] = -1;
+ pid = fork();
+ if (pid < 0)
+ return -1;
+ if (pid > 0) {
+ close(pipefd[1]);
+ /* this read() blocks until the close(pipefd[1]) below */
+ complete_read(pipefd[0], buf, 1);
+ close(pipefd[0]);
+ return pid;
+ }
+ sys_close();
+#ifdef USE_TDB
+ tdb_close(pppdb);
+#endif
+ notify(fork_notifier, 0);
+ close(pipefd[0]);
+ /* this close unblocks the read() call above in the parent */
+ close(pipefd[1]);
+ return 0;
+}
/*
* device_script - run a program to talk to the specified fds
int in, out;
int dont_wait;
{
- int pid, fd;
+ int pid;
int status = -1;
int errfd;
+ int fd;
++conn_running;
- pid = fork();
+ pid = safe_fork();
if (pid < 0) {
--conn_running;
}
/* here we are executing in the child */
+
/* make sure fds 0, 1, 2 are occupied */
while ((fd = dup(in)) >= 0) {
- if (fd > 2) {
+ if (fd > 2) {
close(fd);
break;
}
}
/* dup in and out to fds > 2 */
- in = dup(in);
- out = dup(out);
- if (log_to_fd >= 0) {
- errfd = dup(log_to_fd);
- } else {
- errfd = open(_PATH_CONNERRS, O_WRONLY | O_APPEND | O_CREAT, 0600);
+ {
+ int fd1 = in, fd2 = out, fd3 = log_to_fd;
+
+ in = dup(in);
+ out = dup(out);
+ if (log_to_fd >= 0) {
+ errfd = dup(log_to_fd);
+ } else {
+ errfd = open(_PATH_CONNERRS, O_WRONLY | O_APPEND | O_CREAT, 0600);
+ }
+ close(fd1);
+ close(fd2);
+ close(fd3);
}
/* close fds 0 - 2 and any others we can think of */
close(0);
close(1);
close(2);
- sys_close();
- tty_close_fds();
+ if (the_channel->close)
+ (*the_channel->close)();
+ else
+ close(devfd); /* some plugins don't have a close function */
closelog();
+ close(fd_devnull);
/* dup the in, out, err fds to 0, 1, 2 */
dup2(in, 0);
return 0;
}
- pid = fork();
+ pid = safe_fork();
if (pid == -1) {
error("Failed to create child process for %s: %m", prog);
return -1;
}
- if (pid == 0) {
- int new_fd;
+ if (pid != 0) {
+ if (debug)
+ dbglog("Script %s started (pid %d)", prog, pid);
+ record_child(pid, prog, done, arg);
+ return pid;
+ }
- /* Leave the current location */
- (void) setsid(); /* No controlling tty. */
- (void) umask (S_IRWXG|S_IRWXO);
- (void) chdir ("/"); /* no current directory. */
- setuid(0); /* set real UID = root */
- setgid(getegid());
+ /* Leave the current location */
+ (void) setsid(); /* No controlling tty. */
+ (void) umask (S_IRWXG|S_IRWXO);
+ (void) chdir ("/"); /* no current directory. */
+ setuid(0); /* set real UID = root */
+ setgid(getegid());
- /* Ensure that nothing of our device environment is inherited. */
- sys_close();
- closelog();
- close (0);
- close (1);
- close (2);
- tty_close_fds();
-
- /* Don't pass handles to the PPP device, even by accident. */
- new_fd = open (_PATH_DEVNULL, O_RDWR);
- if (new_fd >= 0) {
- if (new_fd != 0) {
- dup2 (new_fd, 0); /* stdin <- /dev/null */
- close (new_fd);
- }
- dup2 (0, 1); /* stdout -> /dev/null */
- dup2 (0, 2); /* stderr -> /dev/null */
- }
+ /* Ensure that nothing of our device environment is inherited. */
+ closelog();
+ if (the_channel->close)
+ (*the_channel->close)();
+
+ /* Don't pass handles to the PPP device, even by accident. */
+ dup2(fd_devnull, 0);
+ dup2(fd_devnull, 1);
+ dup2(fd_devnull, 2);
+ close(fd_devnull);
#ifdef BSD
- /* Force the priority back to zero if pppd is running higher. */
- if (setpriority (PRIO_PROCESS, 0, 0) < 0)
- warn("can't reset priority to 0: %m");
+ /* Force the priority back to zero if pppd is running higher. */
+ if (setpriority (PRIO_PROCESS, 0, 0) < 0)
+ warn("can't reset priority to 0: %m");
#endif
- /* SysV recommends a second fork at this point. */
+ /* SysV recommends a second fork at this point. */
- /* run the program */
- execve(prog, args, script_env);
- if (must_exist || errno != ENOENT) {
- /* have to reopen the log, there's nowhere else
- for the message to go. */
- reopen_log();
- syslog(LOG_ERR, "Can't execute %s: %m", prog);
- closelog();
- }
- _exit(-1);
+ /* run the program */
+ execve(prog, args, script_env);
+ if (must_exist || errno != ENOENT) {
+ /* have to reopen the log, there's nowhere else
+ for the message to go. */
+ reopen_log();
+ syslog(LOG_ERR, "Can't execute %s: %m", prog);
+ closelog();
}
-
- if (debug)
- dbglog("Script %s started (pid %d)", prog, pid);
- record_child(pid, prog, done, arg);
-
- return pid;
+ _exit(-1);
}
}
}
+/*
+ * childwait_end - we got fed up waiting for the child processes to
+ * exit, send them all a SIGTERM.
+ */
+static void
+childwait_end(arg)
+ void *arg;
+{
+ struct subprocess *chp;
+
+ for (chp = children; chp != NULL; chp = chp->next) {
+ if (debug)
+ dbglog("sending SIGTERM to process %d", chp->pid);
+ kill(chp->pid, SIGTERM);
+ }
+ childwait_done = 1;
+}
/*
* reap_kids - get status from any dead child processes,
* and log a message for abnormal terminations.
*/
static int
-reap_kids(waitfor)
- int waitfor;
+reap_kids()
{
int pid, status;
struct subprocess *chp, **prevp;
if (n_children == 0)
return 0;
- while ((pid = waitpid(-1, &status, (waitfor? 0: WNOHANG))) != -1
- && pid != 0) {
+ while ((pid = waitpid(-1, &status, WNOHANG)) != -1 && pid != 0) {
for (prevp = &children; (chp = *prevp) != NULL; prevp = &chp->next) {
if (chp->pid == pid) {
--n_children;
(chp? chp->prog: "??"), pid, WTERMSIG(status));
} else if (debug)
dbglog("Script %s finished (pid %d), status = 0x%x",
- (chp? chp->prog: "??"), pid, status);
+ (chp? chp->prog: "??"), pid,
+ WIFEXITED(status) ? WEXITSTATUS(status) : status);
if (chp && chp->done)
(*chp->done)(chp->arg);
if (chp)
}
/*
- * notify - call a set of functions registered with add_notify.
+ * notify - call a set of functions registered with add_notifier.
*/
void
notify(notif, val)
if (script_env != 0) {
for (i = 0; (p = script_env[i]) != 0; ++i) {
if (strncmp(p, var, varl) == 0 && p[varl] == '=') {
+#ifdef USE_TDB
if (p[-1] && pppdb != NULL)
delete_db_key(p);
+#endif
free(p-1);
script_env[i] = newstring;
+#ifdef USE_TDB
if (iskey && pppdb != NULL)
add_db_key(newstring);
update_db_entry();
+#endif
return;
}
}
script_env[i] = newstring;
script_env[i+1] = 0;
+#ifdef USE_TDB
if (pppdb != NULL) {
if (iskey)
add_db_key(newstring);
update_db_entry();
}
+#endif
}
/*
return;
for (i = 0; (p = script_env[i]) != 0; ++i) {
if (strncmp(p, var, vl) == 0 && p[vl] == '=') {
+#ifdef USE_TDB
if (p[-1] && pppdb != NULL)
delete_db_key(p);
+#endif
free(p-1);
while ((script_env[i] = script_env[i+1]) != 0)
++i;
break;
}
}
+#ifdef USE_TDB
if (pppdb != NULL)
update_db_entry();
+#endif
}
+#ifdef USE_TDB
/*
* update_db_entry - update our entry in the database.
*/
if (tdb_store(pppdb, key, dbuf, TDB_REPLACE))
error("tdb_store failed: %s", tdb_error(pppdb));
+ if (vbuf)
+ free(vbuf);
+
}
/*
if (p[-1])
delete_db_key(p);
}
+#endif /* USE_TDB */
projects / ppp.git / blobdiff