* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static char rcsid[] = "$Id: main.c,v 1.61 1999/03/16 22:54:42 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 "cbcp.h"
#endif
-#if defined(SUNOS4)
-extern char *strerror();
-#endif
-
#ifdef IPX_CHANGE
#include "ipxcp.h"
#endif /* IPX_CHANGE */
#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 default_devnam[MAXPATHLEN]; /* name of default device */
-static pid_t pid; /* Our pid */
+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 ttyfd = -1; /* Serial port file descriptor */
+int ttyfd; /* Serial port file descriptor */
mode_t tty_mode = -1; /* Original access permissions to tty */
int baud_rate; /* Actual bits/second for serial device */
int hungup; /* terminal has been hung up */
int privileged; /* we're running as real uid root */
int need_holdoff; /* need holdoff period before restarting */
int detached; /* have detached from terminal */
-int log_to_stderr; /* send log messages to stderr too */
-
-static int fd_ppp; /* fd for talking PPP */
+struct stat devstat; /* result of stat() on devnam */
+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 */
+static int pty_master; /* fd for master side of pty */
+static int pty_slave; /* fd for slave side of pty */
+static int real_ttyfd; /* fd for actual serial port (not pty) */
int phase; /* where the link is at */
int kill_link;
u_char inpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for incoming packet */
static int n_children; /* # child processes still running */
+static int got_sigchld; /* set if we have received a SIGCHLD */
static int locked; /* lock() has succeeded */
+static int privopen; /* don't lock, open device as root */
char *no_ppp_msg = "Sorry - this system lacks PPP kernel support\n";
GIDSET_TYPE groups[NGROUPS_MAX];/* groups the user is in */
int ngroups; /* How many groups valid in groups */
+static struct timeval start_time; /* Time when link was started. */
+
+struct pppd_stats link_stats;
+int link_connect_time;
+int link_stats_valid;
+
+static int charshunt_pid; /* Process ID for charshunt */
+
+/*
+ * We maintain a list of child process pids and
+ * functions to call when they exit.
+ */
+struct subprocess {
+ pid_t pid;
+ char *prog;
+ void (*done) __P((void *));
+ void *arg;
+ struct subprocess *next;
+};
+
+static struct subprocess *children;
+
/* 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 open_ccp __P((int));
static void bad_signal __P((int));
static void holdoff_end __P((void *));
-static int device_script __P((char *, int, int));
-static void reap_kids __P((void));
-static void pr_log __P((void *, char *, ...));
-static void logit __P((int, char *, va_list));
-static void vslp_printer __P((void *, char *, ...));
+static int device_script __P((char *, int, int, int));
+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 *));
+static void charshunt __P((int, int, char *));
+static int record_write __P((FILE *, int code, u_char *buf, int nb,
+ struct timeval *));
extern char *ttyname __P((int));
extern char *getlogin __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;
- p = ttyname(0);
- if (p)
- strlcpy(devnam, sizeof(devnam), p);
- strlcpy(default_devnam, sizeof(default_devnam), devnam);
+ 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 */
-#ifdef ULTRIX
- openlog("pppd", LOG_PID);
-#else
- openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
- setlogmask(LOG_UPTO(LOG_INFO));
-#endif
+ reopen_log();
if (gethostname(hostname, MAXNAMELEN) < 0 ) {
option_error("Couldn't get hostname: %m");
}
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,
progname = *argv;
+ prepass = 0;
if (!options_from_file(_PATH_SYSOPTIONS, !privileged, 0, 1)
|| !options_from_user())
- exit(1);
- scan_args(argc-1, argv+1); /* look for tty name on command line */
- if (!options_for_tty()
- || !parse_args(argc-1, argv+1))
- exit(1);
+ exit(EXIT_OPTION_ERROR);
+
+ /* scan command line and options files to find device name */
+ prepass = 1;
+ parse_args(argc-1, argv+1);
+ prepass = 0;
+
+ /*
+ * Work out the device name, if it hasn't already been specified.
+ */
+ using_pty = notty || ptycommand != NULL;
+ if (!using_pty && default_device) {
+ char *p;
+ if (!isatty(0) || (p = ttyname(0)) == NULL) {
+ option_error("no device specified and stdin is not a tty");
+ exit(EXIT_OPTION_ERROR);
+ }
+ strlcpy(devnam, p, sizeof(devnam));
+ if (stat(devnam, &devstat) < 0)
+ fatal("Couldn't stat default device %s: %m", devnam);
+ }
+
+ /*
+ * Parse the tty options file and the command line.
+ * The per-tty options file should not change
+ * ptycommand, notty or devnam.
+ */
+ devnam_fixed = 1;
+ if (!using_pty) {
+ if (!options_for_tty())
+ exit(EXIT_OPTION_ERROR);
+ }
+
+ devnam_fixed = 0;
+ if (!parse_args(argc-1, argv+1))
+ exit(EXIT_OPTION_ERROR);
/*
* Check that we are running as root.
if (geteuid() != 0) {
option_error("must be root to run %s, since it is not setuid-root",
argv[0]);
- exit(1);
+ exit(EXIT_NOT_ROOT);
}
if (!ppp_available()) {
option_error(no_ppp_msg);
- exit(1);
+ exit(EXIT_NO_KERNEL_SUPPORT);
}
/*
* Check that the options given are valid and consistent.
*/
if (!sys_check_options())
- exit(1);
+ exit(EXIT_OPTION_ERROR);
auth_check_options();
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(1);
+ exit(EXIT_OPTION_ERROR);
}
-
- script_setenv("DEVICE", devnam);
- slprintf(numbuf, sizeof(numbuf), "%d", baud_rate);
- script_setenv("SPEED", numbuf);
+ /* 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) {
+ option_error("%s option precludes specifying device name",
+ notty? "notty": "pty");
+ exit(EXIT_OPTION_ERROR);
+ }
+ if (ptycommand != NULL && notty) {
+ option_error("pty option is incompatible with notty option");
+ exit(EXIT_OPTION_ERROR);
+ }
+ default_device = notty;
+ lockflag = 0;
+ modem = 0;
+ if (notty && log_to_fd <= 1)
+ log_to_fd = -1;
+ } else {
+ /*
+ * If the user has specified a device which is the same as
+ * the one on stdin, pretend they didn't specify any.
+ * If the device is already open read/write on stdin,
+ * we assume we don't need to lock it, and we can open it as root.
+ */
+ if (fstat(0, &statbuf) >= 0 && S_ISCHR(statbuf.st_mode)
+ && statbuf.st_rdev == devstat.st_rdev) {
+ default_device = 1;
+ fdflags = fcntl(0, F_GETFL);
+ if (fdflags != -1 && (fdflags & O_ACCMODE) == O_RDWR)
+ privopen = 1;
+ }
+ }
+ if (default_device)
+ nodetach = 1;
/*
- * If the user has specified the default device name explicitly,
- * pretend they hadn't.
+ * Don't send log messages to the serial port, it tends to
+ * confuse the peer. :-)
*/
- if (!default_device && strcmp(devnam, default_devnam) == 0)
- default_device = 1;
- if (default_device)
- nodetach = 1;
- log_to_stderr = !default_device;
+ if (log_to_fd >= 0 && fstat(log_to_fd, &statbuf) >= 0
+ && S_ISCHR(statbuf.st_mode) && statbuf.st_rdev == devstat.st_rdev)
+ log_to_fd = -1;
+
+ 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));
*/
if (!nodetach && !updetach)
detach();
- pid = getpid();
p = getlogin();
if (p == NULL) {
pw = getpwuid(uid);
}
syslog(LOG_NOTICE, "pppd %s.%d%s started by %s, uid %d",
VERSION, PATCHLEVEL, IMPLEMENTATION, p, uid);
-
+ script_setenv("PPPLOGNAME", p);
+
/*
* Compute mask of all interesting signals and install signal handlers
* for each. Only one signal handler may be active at a time. Therefore,
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;
-
- if (demand) {
+ ttyfd = -1;
+ real_ttyfd = -1;
+ status = EXIT_OK;
+ ++unsuccess;
+ doing_callback = do_callback;
+ do_callback = 0;
+
+ 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 (;;) {
if (sigsetjmp(sigjmp, 1) == 0) {
sigprocmask(SIG_BLOCK, &mask, NULL);
- if (kill_link) {
+ if (kill_link || got_sigchld) {
sigprocmask(SIG_UNBLOCK, &mask, NULL);
} else {
waiting = 1;
}
if (get_loop_output())
break;
- reap_kids();
+ if (got_sigchld)
+ reap_kids(0);
}
remove_fd(fd_loop);
if (kill_link && !persist)
info("Starting link");
}
+ new_phase(PHASE_SERIALCONN);
+
+ /*
+ * Get a pty master/slave pair if the pty, notty, or record
+ * options were specified.
+ */
+ strlcpy(ppp_devnam, devnam, sizeof(ppp_devnam));
+ pty_master = -1;
+ pty_slave = -1;
+ if (ptycommand != NULL || notty || record_file != NULL) {
+ if (!get_pty(&pty_master, &pty_slave, ppp_devnam, uid)) {
+ error("Couldn't allocate pseudo-tty");
+ status = EXIT_FATAL_ERROR;
+ goto fail;
+ }
+ set_up_tty(pty_slave, 1);
+ }
+
/*
* Lock the device if we've been asked to.
*/
- if (lockflag && !default_device) {
+ status = EXIT_LOCK_FAILED;
+ if (lockflag && !privopen) {
if (lock(devnam) < 0)
goto fail;
locked = 1;
*/
hungup = 0;
kill_link = 0;
- for (;;) {
- /* If the user specified the device name, become the
- user before opening it. */
- if (!devnam_info.priv)
- seteuid(uid);
- ttyfd = open(devnam, O_NONBLOCK | O_RDWR, 0);
- if (!devnam_info.priv)
- seteuid(0);
- if (ttyfd >= 0)
- break;
- if (errno != EINTR)
- error("Failed to open %s: %m", devnam);
- if (!persist || errno != EINTR)
- goto fail;
- }
- if ((fdflags = fcntl(ttyfd, F_GETFL)) == -1
- || fcntl(ttyfd, F_SETFL, fdflags & ~O_NONBLOCK) < 0)
- warn("Couldn't reset non-blocking mode on device: %m");
-
- /*
- * Do the equivalent of `mesg n' to stop broadcast messages.
- */
- if (fstat(ttyfd, &statbuf) < 0
- || fchmod(ttyfd, statbuf.st_mode & ~(S_IWGRP | S_IWOTH)) < 0) {
- warn("Couldn't restrict write permissions to %s: %m", devnam);
- } else
- tty_mode = statbuf.st_mode;
-
- /* run connection script */
- if (connector && connector[0]) {
- MAINDEBUG(("Connecting with <%s>", connector));
-
- if (!default_device && modem) {
- hangup_modem(ttyfd); /* in case modem is off hook */
- sleep(1);
+ connector = doing_callback? callback_script: connect_script;
+ if (devnam[0] != 0) {
+ for (;;) {
+ /* If the user specified the device name, become the
+ user before opening it. */
+ int err;
+ if (!devnam_info.priv && !privopen)
+ seteuid(uid);
+ ttyfd = open(devnam, O_NONBLOCK | O_RDWR, 0);
+ err = errno;
+ if (!devnam_info.priv && !privopen)
+ seteuid(0);
+ if (ttyfd >= 0)
+ break;
+ errno = err;
+ if (err != EINTR) {
+ error("Failed to open %s: %m", devnam);
+ status = EXIT_OPEN_FAILED;
+ }
+ if (!persist || err != EINTR)
+ goto fail;
}
+ if ((fdflags = fcntl(ttyfd, F_GETFL)) == -1
+ || fcntl(ttyfd, F_SETFL, fdflags & ~O_NONBLOCK) < 0)
+ warn("Couldn't reset non-blocking mode on device: %m");
+
+ /*
+ * Do the equivalent of `mesg n' to stop broadcast messages.
+ */
+ if (fstat(ttyfd, &statbuf) < 0
+ || fchmod(ttyfd, statbuf.st_mode & ~(S_IWGRP | S_IWOTH)) < 0) {
+ warn("Couldn't restrict write permissions to %s: %m", devnam);
+ } else
+ tty_mode = statbuf.st_mode;
/*
* Set line speed, flow control, etc.
- * On most systems we set CLOCAL for now so that we can talk
+ * If we have a non-null connection or initializer script,
+ * on most systems we set CLOCAL for now so that we can talk
* to the modem before carrier comes up. But this has the
* side effect that we might miss it if CD drops before we
* get to clear CLOCAL below. On systems where we can talk
* successfully to the modem with CLOCAL clear and CD down,
* we could clear CLOCAL at this point.
*/
- set_up_tty(ttyfd, 1);
+ set_up_tty(ttyfd, ((connector != NULL && connector[0] != 0)
+ || initializer != NULL));
+ real_ttyfd = ttyfd;
+ }
- if (device_script(connector, ttyfd, ttyfd) < 0) {
- error("Connect script failed");
+ /*
+ * If the notty and/or record option was specified,
+ * start up the character shunt now.
+ */
+ status = EXIT_PTYCMD_FAILED;
+ if (ptycommand != NULL) {
+ if (record_file != NULL) {
+ int ipipe[2], opipe[2], ok;
+
+ if (pipe(ipipe) < 0 || pipe(opipe) < 0)
+ fatal("Couldn't create pipes for record option: %m");
+ ok = device_script(ptycommand, opipe[0], ipipe[1], 1) == 0
+ && start_charshunt(ipipe[0], opipe[1]);
+ close(ipipe[0]);
+ close(ipipe[1]);
+ close(opipe[0]);
+ close(opipe[1]);
+ if (!ok)
+ goto fail;
+ } else {
+ if (device_script(ptycommand, pty_master, pty_master, 1) < 0)
+ goto fail;
+ ttyfd = pty_slave;
+ close(pty_master);
+ pty_master = -1;
+ }
+ } else if (notty) {
+ if (!start_charshunt(0, 1))
+ goto fail;
+ } else if (record_file != NULL) {
+ if (!start_charshunt(ttyfd, ttyfd))
goto fail;
+ }
+
+ /* 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);
+ setdtr(real_ttyfd, 1);
+ }
}
- info("Serial connection established.");
- sleep(1); /* give it time to set up its terminal */
- }
+ if (initializer && initializer[0]) {
+ if (device_script(initializer, ttyfd, ttyfd, 0) < 0) {
+ error("Initializer script failed");
+ status = EXIT_INIT_FAILED;
+ goto fail;
+ }
+ if (kill_link)
+ goto disconnect;
- /* set line speed, flow control, etc.; clear CLOCAL if modem option */
- set_up_tty(ttyfd, 0);
+ info("Serial port initialized.");
+ }
+
+ if (connector && connector[0]) {
+ if (device_script(connector, ttyfd, ttyfd, 0) < 0) {
+ error("Connect script failed");
+ status = EXIT_CONNECT_FAILED;
+ goto fail;
+ }
+ if (kill_link)
+ goto disconnect;
+
+ info("Serial connection established.");
+ }
+
+ /* set line speed, flow control, etc.;
+ 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 */
- if (connector == NULL && modem) {
+ if (connector == NULL && modem && devnam[0] != 0) {
for (;;) {
if ((i = open(devnam, O_RDWR)) >= 0)
break;
- if (errno != EINTR)
+ if (errno != EINTR) {
error("Failed to reopen %s: %m", devnam);
+ status = EXIT_OPEN_FAILED;
+ }
if (!persist || errno != EINTR || hungup || kill_link)
goto fail;
}
close(i);
}
+ slprintf(numbuf, sizeof(numbuf), "%d", baud_rate);
+ script_setenv("SPEED", numbuf);
+
/* run welcome script, if any */
if (welcomer && welcomer[0]) {
- if (device_script(welcomer, ttyfd, ttyfd) < 0)
+ if (device_script(welcomer, ttyfd, ttyfd, 0) < 0)
warn("Welcome script failed");
}
/* set up the serial device as a ppp interface */
fd_ppp = establish_ppp(ttyfd);
+ if (fd_ppp < 0) {
+ status = EXIT_FATAL_ERROR;
+ goto disconnect;
+ }
if (!demand) {
* Start opening the connection and wait for
* incoming events (reply, timeout, etc.).
*/
- notice("Connect: %s <--> %s", ifname, devnam);
+ notice("Connect: %s <--> %s", ifname, ppp_devnam);
+ gettimeofday(&start_time, NULL);
+ link_stats_valid = 0;
+ script_unsetenv("CONNECT_TIME");
+ script_unsetenv("BYTES_SENT");
+ script_unsetenv("BYTES_RCVD");
lcp_lowerup(0);
+
+ /*
+ * If we are initiating this connection, wait for a short
+ * time for something from the peer. This can avoid bouncing
+ * our packets off his tty before he has it set up.
+ */
+ add_fd(fd_ppp);
+ if (connect_delay != 0 && (connector != NULL || ptycommand != NULL)) {
+ struct timeval t;
+ 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);
- for (phase = PHASE_ESTABLISH; phase != PHASE_DEAD; ) {
+ status = EXIT_NEGOTIATION_FAILED;
+ new_phase(PHASE_ESTABLISH);
+ while (phase != PHASE_DEAD) {
if (sigsetjmp(sigjmp, 1) == 0) {
sigprocmask(SIG_BLOCK, &mask, NULL);
- if (kill_link || open_ccp_flag) {
+ if (kill_link || open_ccp_flag || got_sigchld) {
sigprocmask(SIG_UNBLOCK, &mask, NULL);
} else {
waiting = 1;
}
waiting = 0;
calltimeout();
+ get_input();
if (kill_link) {
lcp_close(0, "User request");
kill_link = 0;
}
- get_input();
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);
}
open_ccp_flag = 0;
}
- reap_kids(); /* Don't leave dead kids lying around */
+ if (got_sigchld)
+ reap_kids(0); /* Don't leave dead kids lying around */
+ }
+
+ /*
+ * 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);
+ }
+
+ /*
+ * 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 (demand)
restore_loop();
disestablish_ppp(ttyfd);
+ fd_ppp = -1;
+ if (!hungup)
+ lcp_lowerdown(0);
/*
* Run disconnector script, if requested.
* XXX we may not be able to do this if the line has hung up!
*/
- if (disconnector && !hungup) {
- set_up_tty(ttyfd, 1);
- if (device_script(disconnector, ttyfd, ttyfd) < 0) {
+ disconnect:
+ if (disconnect_script && !hungup) {
+ new_phase(PHASE_DISCONNECT);
+ if (real_ttyfd >= 0)
+ set_up_tty(real_ttyfd, 1);
+ if (device_script(disconnect_script, ttyfd, ttyfd, 0) < 0) {
warn("disconnect script failed");
} else {
info("Serial link disconnected.");
}
}
- if (!hungup)
- lcp_lowerdown(0);
fail:
- if (ttyfd >= 0)
+ if (pty_master >= 0)
+ close(pty_master);
+ if (pty_slave >= 0)
+ close(pty_slave);
+ if (real_ttyfd >= 0)
close_tty();
if (locked) {
unlock();
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);
- if (kill_link) {
+ if (kill_link || got_sigchld) {
sigprocmask(SIG_UNBLOCK, &mask, NULL);
} else {
waiting = 1;
calltimeout();
if (kill_link) {
kill_link = 0;
- phase = PHASE_DORMANT; /* allow signal to end holdoff */
+ new_phase(PHASE_DORMANT); /* allow signal to end holdoff */
}
- reap_kids();
+ if (got_sigchld)
+ reap_kids(0);
} while (phase == PHASE_HOLDOFF);
if (!persist)
break;
}
/* Wait for scripts to finish */
- while (n_children > 0)
- reap_kids();
+ /* XXX should have a timeout here */
+ while (n_children > 0) {
+ 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;
+ }
- die(0);
+ die(status);
return 0;
}
void
detach()
{
+ int pid;
+
if (detached)
return;
- if (daemon(0, 0) < 0) {
- perror("Couldn't detach from controlling terminal");
- die(1);
+ if ((pid = fork()) < 0) {
+ error("Couldn't detach (fork failed: %m)");
+ die(1); /* or just return? */
}
+ if (pid != 0) {
+ /* parent */
+ if (locked)
+ relock(pid);
+ exit(0); /* parent dies */
+ }
+ setsid();
+ chdir("/");
+ close(0);
+ close(1);
+ close(2);
detached = 1;
- log_to_stderr = 0;
- pid = getpid();
- /* update pid file if it has been written already */
+ log_to_fd = -1;
+ /* update pid files if they have been written already */
if (pidfilename[0])
create_pidfile();
+ if (linkpidfile[0])
+ create_linkpidfile();
+}
+
+/*
+ * reopen_log - (re)open our connection to syslog.
+ */
+void
+reopen_log()
+{
+#ifdef ULTRIX
+ openlog("pppd", LOG_PID);
+#else
+ openlog("pppd", LOG_PID | LOG_NDELAY, LOG_PPP);
+ setlogmask(LOG_UPTO(LOG_INFO));
+#endif
}
/*
slprintf(pidfilename, sizeof(pidfilename), "%s%s.pid",
_PATH_VARRUN, ifname);
if ((pidfile = fopen(pidfilename, "w")) != NULL) {
- fprintf(pidfile, "%d\n", pid);
+ fprintf(pidfile, "%d\n", getpid());
(void) fclose(pidfile);
} else {
error("Failed to create pid file %s: %m", pidfilename);
pidfilename[0] = 0;
}
- slprintf(numbuf, sizeof(numbuf), "%d", pid);
+ 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 (len == 0) {
notice("Modem hangup");
hungup = 1;
+ status = EXIT_HANGUP;
lcp_lowerdown(0); /* serial link is no longer available */
link_terminated(0);
return;
}
}
- 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);
}
-
/*
- * quit - Clean up state and exit (with an error indication).
+ * new_phase - signal the start of a new phase of pppd's operation.
*/
-void
-quit()
+void
+new_phase(p)
+ int p;
{
- die(1);
+ phase = p;
+ if (new_phase_hook)
+ (*new_phase_hook)(p);
}
/*
- * die - like quit, except we can specify an exit status.
+ * die - clean up state and exit with the specified status.
*/
void
die(status)
{
sys_cleanup();
- if (ttyfd >= 0)
+ if (fd_ppp >= 0)
+ disestablish_ppp(ttyfd);
+ if (real_ttyfd >= 0)
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();
static void
close_tty()
{
- disestablish_ppp(ttyfd);
-
/* drop dtr to hang up */
if (!default_device && modem) {
- hangup_modem(ttyfd);
+ setdtr(real_ttyfd, 0);
/*
* This sleep is in case the serial port has CLOCAL set by default,
* and consequently will reassert DTR when we close the device.
sleep(1);
}
- restore_tty(ttyfd);
+ restore_tty(real_ttyfd);
if (tty_mode != (mode_t) -1) {
- if (fchmod(ttyfd, tty_mode) != 0) {
+ if (fchmod(real_ttyfd, tty_mode) != 0) {
/* XXX if devnam is a symlink, this will change the link */
chmod(devnam, tty_mode);
}
}
- close(ttyfd);
- ttyfd = -1;
+ close(real_ttyfd);
+ real_ttyfd = -1;
}
/*
- * hangup_modem - hang up the modem by clearing DTR.
+ * update_link_stats - get stats at link termination.
*/
-void hangup_modem(ttyfd)
- int ttyfd;
+void
+update_link_stats(u)
+ int u;
{
- setdtr(ttyfd, 0);
+ struct timeval now;
+ char numbuf[32];
+
+ if (!get_ppp_stats(u, &link_stats)
+ || gettimeofday(&now, NULL) < 0)
+ return;
+ link_connect_time = now.tv_sec - start_time.tv_sec;
+ link_stats_valid = 1;
+
+ slprintf(numbuf, sizeof(numbuf), "%d", link_connect_time);
+ script_setenv("CONNECT_TIME", numbuf);
+ slprintf(numbuf, sizeof(numbuf), "%d", link_stats.bytes_out);
+ script_setenv("BYTES_SENT", numbuf);
+ slprintf(numbuf, sizeof(numbuf), "%d", link_stats.bytes_in);
+ script_setenv("BYTES_RCVD", numbuf);
}
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;
}
}
{
info("Hangup (SIGHUP)");
kill_link = 1;
+ if (status != EXIT_HANGUP)
+ status = EXIT_USER_REQUEST;
if (conn_running)
/* Send the signal to the [dis]connector process(es) also */
kill_my_pg(sig);
+ if (charshunt_pid)
+ kill(charshunt_pid, sig);
if (waiting)
siglongjmp(sigjmp, 1);
}
info("Terminating on signal %d.", sig);
persist = 0; /* don't try to restart */
kill_link = 1;
+ status = EXIT_USER_REQUEST;
if (conn_running)
/* Send the signal to the [dis]connector process(es) also */
kill_my_pg(sig);
+ if (charshunt_pid)
+ kill(charshunt_pid, sig);
if (waiting)
siglongjmp(sigjmp, 1);
}
/*
* chld - Catch SIGCHLD signal.
- * Calls reap_kids to get status for any dead kids.
+ * Sets a flag so we will call reap_kids in the mainline.
*/
static void
chld(sig)
int sig;
{
+ got_sigchld = 1;
if (waiting)
siglongjmp(sigjmp, 1);
}
error("Fatal signal %d", sig);
if (conn_running)
kill_my_pg(SIGTERM);
- die(1);
+ if (charshunt_pid)
+ kill(charshunt_pid, SIGTERM);
+ die(127);
}
/*
- * device_script - run a program to connect or disconnect the
- * serial device.
+ * device_script - run a program to talk to the serial device
+ * (e.g. to run the connector or disconnector script).
*/
static int
-device_script(program, in, out)
+device_script(program, in, out, dont_wait)
char *program;
int in, out;
+ int dont_wait;
{
int pid;
- int status;
+ int status = -1;
int errfd;
- conn_running = 1;
+ ++conn_running;
pid = fork();
if (pid < 0) {
- conn_running = 0;
- fatal("Failed to create child process: %m");
+ --conn_running;
+ error("Failed to create child process: %m");
+ return -1;
}
if (pid == 0) {
sys_close();
closelog();
- if (in == out) {
- if (in != 0) {
- dup2(in, 0);
- close(in);
- }
- dup2(0, 1);
- } else {
- if (out == 0)
- out = dup(out);
- if (in != 0) {
- dup2(in, 0);
- close(in);
- }
- if (out != 1) {
- dup2(out, 1);
- close(out);
- }
+ if (in == 2) {
+ /* aargh!!! */
+ int newin = dup(in);
+ if (in == out)
+ out = newin;
+ in = newin;
+ } else if (out == 2) {
+ out = dup(out);
}
- if (!nodetach && !updetach) {
+ if (log_to_fd >= 0) {
+ if (log_to_fd != 2)
+ dup2(log_to_fd, 2);
+ } else {
close(2);
errfd = open(_PATH_CONNERRS, O_WRONLY | O_APPEND | O_CREAT, 0600);
if (errfd >= 0 && errfd != 2) {
close(errfd);
}
}
+ if (in != 0) {
+ if (out == 0)
+ out = dup(out);
+ dup2(in, 0);
+ }
+ if (out != 1) {
+ dup2(out, 1);
+ }
+ if (real_ttyfd > 2)
+ close(real_ttyfd);
+ if (pty_master > 2)
+ close(pty_master);
+ if (pty_slave > 2)
+ close(pty_slave);
setuid(uid);
if (getuid() != uid) {
error("setuid failed");
/* NOTREACHED */
}
- while (waitpid(pid, &status, 0) < 0) {
- if (errno == EINTR)
- continue;
- fatal("error waiting for (dis)connection process: %m");
+ if (dont_wait) {
+ record_child(pid, program, NULL, NULL);
+ status = 0;
+ } else {
+ while (waitpid(pid, &status, 0) < 0) {
+ if (errno == EINTR)
+ continue;
+ fatal("error waiting for (dis)connection process: %m");
+ }
+ --conn_running;
}
- conn_running = 0;
return (status == 0 ? 0 : -1);
}
-/*
- * We maintain a list of child process pids and
- * functions to call when they exit.
- */
-struct subprocess {
- pid_t pid;
- char *prog;
- void (*done) __P((void *));
- void *arg;
- struct subprocess *next;
-};
-
-struct subprocess *children;
-
/*
* run-program - execute a program with given arguments,
* but don't wait for it.
void *arg;
{
int pid;
- struct subprocess *chp;
struct stat sbuf;
/*
}
pid = fork();
- if (pid == -1)
- fatal("Failed to create child process for %s: %m", prog);
+ if (pid == -1) {
+ error("Failed to create child process for %s: %m", prog);
+ return -1;
+ }
if (pid == 0) {
int new_fd;
close (1);
close (2);
close (ttyfd); /* tty interface to the ppp device */
+ if (real_ttyfd >= 0)
+ close(real_ttyfd);
/* Don't pass handles to the PPP device, even by accident. */
new_fd = open (_PATH_DEVNULL, O_RDWR);
/* run the program */
execve(prog, args, script_env);
- if (must_exist || errno != ENOENT)
- warn("Can't execute %s: %m", prog);
+ 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);
}
if (debug)
- dbglog("Script %s started; pid = %d", prog, pid);
+ dbglog("Script %s started (pid %d)", prog, pid);
+ record_child(pid, prog, done, arg);
+
+ return pid;
+}
+
+
+/*
+ * record_child - add a child process to the list for reap_kids
+ * to use.
+ */
+static void
+record_child(pid, prog, done, arg)
+ int pid;
+ char *prog;
+ void (*done) __P((void *));
+ void *arg;
+{
+ struct subprocess *chp;
+
++n_children;
chp = (struct subprocess *) malloc(sizeof(struct subprocess));
chp->next = children;
children = chp;
}
-
- return pid;
}
* reap_kids - get status from any dead child processes,
* and log a message for abnormal terminations.
*/
-static void
-reap_kids()
+static int
+reap_kids(waitfor)
+ int waitfor;
{
int pid, status;
struct subprocess *chp, **prevp;
+ got_sigchld = 0;
if (n_children == 0)
- return;
- while ((pid = waitpid(-1, &status, WNOHANG)) != -1 && pid != 0) {
+ return 0;
+ while ((pid = waitpid(-1, &status, (waitfor? 0: WNOHANG))) != -1
+ && pid != 0) {
--n_children;
- for (prevp = &children; (chp = *prevp) != NULL; prevp = &chp->next)
- if (chp->pid == pid)
+ for (prevp = &children; (chp = *prevp) != NULL; prevp = &chp->next) {
+ if (chp->pid == pid) {
+ *prevp = chp->next;
break;
- if (debug)
- dbglog("process %d (%s) finished, status = 0x%x",
- pid, (chp? chp->prog: "??"), status);
+ }
+ }
if (WIFSIGNALED(status)) {
warn("Child process %s (pid %d) terminated with signal %d",
(chp? chp->prog: "??"), pid, WTERMSIG(status));
- }
+ } else if (debug)
+ dbglog("Script %s finished (pid %d), status = 0x%x",
+ (chp? chp->prog: "??"), pid, status);
if (chp && chp->done)
(*chp->done)(chp->arg);
+ if (chp)
+ free(chp);
}
- if (pid == -1 && errno != ECHILD)
- error("Error waiting for child process: %m");
-}
-
-
-/*
- * log_packet - format a packet and log it.
- */
-
-char line[256]; /* line to be logged accumulated here */
-char *linep;
-
-void
-log_packet(p, len, prefix, level)
- u_char *p;
- int len;
- char *prefix;
- int level;
-{
- strlcpy(line, sizeof(line), prefix);
- linep = line + strlen(line);
- format_packet(p, len, pr_log, NULL);
- if (linep != line)
- syslog(level, "%s", line);
-}
-
-/*
- * format_packet - make a readable representation of a packet,
- * calling `printer(arg, format, ...)' to output it.
- */
-void
-format_packet(p, len, printer, arg)
- u_char *p;
- int len;
- void (*printer) __P((void *, char *, ...));
- void *arg;
-{
- int i, n;
- u_short proto;
- 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; (protp = protocols[i]) != NULL; ++i)
- if (proto == protp->protocol)
- break;
- if (protp != NULL) {
- printer(arg, "[%s", protp->name);
- n = (*protp->printpkt)(p, len, printer, arg);
- printer(arg, "]");
- p += n;
- len -= n;
- } else {
- for (i = 0; (protp = protocols[i]) != NULL; ++i)
- if (proto == (protp->protocol & ~0x8000))
- break;
- if (protp != 0 && protp->data_name != 0) {
- printer(arg, "[%s data]", protp->data_name);
- if (len > 8)
- printer(arg, "%.8B ...", p);
- else
- printer(arg, "%.*B", len, p);
- len = 0;
- } else
- printer(arg, "[proto=0x%x]", proto);
- }
+ if (pid == -1) {
+ if (errno == ECHILD)
+ return -1;
+ if (errno != EINTR)
+ error("Error waiting for child process: %m");
}
-
- if (len > 32)
- printer(arg, "%.32B ...", p);
- else
- printer(arg, "%.*B", len, p);
+ return 0;
}
-static void
-pr_log __V((void *arg, char *fmt, ...))
-{
- int n;
- va_list pvar;
- char buf[256];
-
-#if __STDC__
- va_start(pvar, fmt);
-#else
- void *arg;
- char *fmt;
- va_start(pvar);
- arg = va_arg(pvar, void *);
- fmt = va_arg(pvar, char *);
-#endif
-
- n = vslprintf(buf, sizeof(buf), fmt, pvar);
- va_end(pvar);
-
- if (linep + n + 1 > line + sizeof(line)) {
- syslog(LOG_DEBUG, "%s", line);
- linep = line;
- }
- strlcpy(linep, line + sizeof(line) - linep, buf);
- linep += n;
-}
-
-/*
- * vslp_printer - used in processing a %P format
- */
-struct buffer_info {
- char *ptr;
- int len;
-};
-
-static void
-vslp_printer __V((void *arg, char *fmt, ...))
-{
- int n;
- va_list pvar;
- struct buffer_info *bi;
-
-#if __STDC__
- va_start(pvar, fmt);
-#else
- void *arg;
- char *fmt;
- va_start(pvar);
- arg = va_arg(pvar, void *);
- fmt = va_arg(pvar, char *);
-#endif
-
- bi = (struct buffer_info *) arg;
- n = vslprintf(bi->ptr, bi->len, fmt, pvar);
- va_end(pvar);
-
- bi->ptr += n;
- bi->len -= n;
-}
-
-/*
- * print_string - print a readable representation of a string using
- * printer.
- */
-void
-print_string(p, len, printer, arg)
- char *p;
- int len;
- void (*printer) __P((void *, char *, ...));
- void *arg;
-{
- int c;
-
- printer(arg, "\"");
- for (; len > 0; --len) {
- c = *p++;
- if (' ' <= c && c <= '~') {
- if (c == '\\' || c == '"')
- printer(arg, "\\");
- printer(arg, "%c", c);
- } else {
- switch (c) {
- case '\n':
- printer(arg, "\\n");
- break;
- case '\r':
- printer(arg, "\\r");
- break;
- case '\t':
- printer(arg, "\\t");
- break;
- default:
- printer(arg, "\\%.3o", c);
- }
- }
- }
- printer(arg, "\"");
-}
/*
* novm - log an error message saying we ran out of memory, and die.
fatal("Virtual memory exhausted allocating %s\n", msg);
}
-/*
- * slprintf - format a message into a buffer. Like sprintf except we
- * also specify the length of the output buffer, and we handle
- * %r (recursive format), %m (error message), %v (visible string),
- * %q (quoted string), %t (current time) and %I (IP address) formats.
- * Doesn't do floating-point formats.
- * Returns the number of chars put into buf.
- */
-int
-slprintf __V((char *buf, int buflen, char *fmt, ...))
-{
- va_list args;
- int n;
-
-#if __STDC__
- va_start(args, fmt);
-#else
- char *buf;
- int buflen;
- char *fmt;
- va_start(args);
- buf = va_arg(args, char *);
- buflen = va_arg(args, int);
- fmt = va_arg(args, char *);
-#endif
- n = vslprintf(buf, buflen, fmt, args);
- va_end(args);
- return n;
-}
-
-/*
- * vslprintf - like slprintf, takes a va_list instead of a list of args.
- */
-#define OUTCHAR(c) (buflen > 0? (--buflen, *buf++ = (c)): 0)
-
-int
-vslprintf(buf, buflen, fmt, args)
- char *buf;
- int buflen;
- char *fmt;
- va_list args;
-{
- int c, i, n;
- int width, prec, fillch;
- int base, len, neg, quoted;
- unsigned long val = 0;
- char *str, *f, *buf0;
- unsigned char *p;
- char num[32];
- time_t t;
- u_int32_t ip;
- static char hexchars[] = "0123456789abcdef";
- struct buffer_info bufinfo;
-
- buf0 = buf;
- --buflen;
- while (buflen > 0) {
- for (f = fmt; *f != '%' && *f != 0; ++f)
- ;
- if (f > fmt) {
- len = f - fmt;
- if (len > buflen)
- len = buflen;
- memcpy(buf, fmt, len);
- buf += len;
- buflen -= len;
- fmt = f;
- }
- if (*fmt == 0)
- break;
- c = *++fmt;
- width = prec = 0;
- fillch = ' ';
- if (c == '0') {
- fillch = '0';
- c = *++fmt;
- }
- if (c == '*') {
- width = va_arg(args, int);
- c = *++fmt;
- } else {
- while (isdigit(c)) {
- width = width * 10 + c - '0';
- c = *++fmt;
- }
- }
- if (c == '.') {
- c = *++fmt;
- if (c == '*') {
- prec = va_arg(args, int);
- c = *++fmt;
- } else {
- while (isdigit(c)) {
- prec = prec * 10 + c - '0';
- c = *++fmt;
- }
- }
- }
- str = 0;
- base = 0;
- neg = 0;
- ++fmt;
- switch (c) {
- case 'd':
- i = va_arg(args, int);
- if (i < 0) {
- neg = 1;
- val = -i;
- } else
- val = i;
- base = 10;
- break;
- case 'o':
- val = va_arg(args, unsigned int);
- base = 8;
- break;
- case 'x':
- case 'X':
- val = va_arg(args, unsigned int);
- base = 16;
- break;
- case 'p':
- val = (unsigned long) va_arg(args, void *);
- base = 16;
- neg = 2;
- break;
- case 's':
- str = va_arg(args, char *);
- break;
- case 'c':
- num[0] = va_arg(args, int);
- num[1] = 0;
- str = num;
- break;
- case 'm':
- str = strerror(errno);
- break;
- case 'I':
- ip = va_arg(args, u_int32_t);
- ip = ntohl(ip);
- slprintf(num, sizeof(num), "%d.%d.%d.%d", (ip >> 24) & 0xff,
- (ip >> 16) & 0xff, (ip >> 8) & 0xff, ip & 0xff);
- str = num;
- break;
- case 'r':
- f = va_arg(args, char *);
-#ifndef __powerpc__
- n = vslprintf(buf, buflen + 1, f, va_arg(args, va_list));
-#else
- /* On the powerpc, a va_list is an array of 1 structure */
- n = vslprintf(buf, buflen + 1, f, va_arg(args, void *));
-#endif
- buf += n;
- buflen -= n;
- continue;
- case 't':
- time(&t);
- str = ctime(&t);
- str += 4; /* chop off the day name */
- str[15] = 0; /* chop off year and newline */
- break;
- case 'v': /* "visible" string */
- case 'q': /* quoted string */
- quoted = c == 'q';
- p = va_arg(args, unsigned char *);
- if (fillch == '0' && prec > 0) {
- n = prec;
- } else {
- n = strlen((char *)p);
- if (prec > 0 && prec < n)
- n = prec;
- }
- while (n > 0 && buflen > 0) {
- c = *p++;
- --n;
- if (!quoted && c >= 0x80) {
- OUTCHAR('M');
- OUTCHAR('-');
- c -= 0x80;
- }
- if (quoted && (c == '"' || c == '\\'))
- OUTCHAR('\\');
- if (c < 0x20 || (0x7f <= c && c < 0xa0)) {
- if (quoted) {
- OUTCHAR('\\');
- switch (c) {
- case '\t': OUTCHAR('t'); break;
- case '\n': OUTCHAR('n'); break;
- case '\b': OUTCHAR('b'); break;
- case '\f': OUTCHAR('f'); break;
- default:
- OUTCHAR('x');
- OUTCHAR(hexchars[c >> 4]);
- OUTCHAR(hexchars[c & 0xf]);
- }
- } else {
- if (c == '\t')
- OUTCHAR(c);
- else {
- OUTCHAR('^');
- OUTCHAR(c ^ 0x40);
- }
- }
- } else
- OUTCHAR(c);
- }
- continue;
- case 'P': /* print PPP packet */
- bufinfo.ptr = buf;
- bufinfo.len = buflen + 1;
- p = va_arg(args, unsigned char *);
- n = va_arg(args, int);
- format_packet(p, n, vslp_printer, &bufinfo);
- buf = bufinfo.ptr;
- buflen = bufinfo.len - 1;
- continue;
- case 'B':
- p = va_arg(args, unsigned char *);
- for (n = prec; n > 0; --n) {
- c = *p++;
- if (fillch == ' ')
- OUTCHAR(' ');
- OUTCHAR(hexchars[(c >> 4) & 0xf]);
- OUTCHAR(hexchars[c & 0xf]);
- }
- continue;
- default:
- *buf++ = '%';
- if (c != '%')
- --fmt; /* so %z outputs %z etc. */
- --buflen;
- continue;
- }
- if (base != 0) {
- str = num + sizeof(num);
- *--str = 0;
- while (str > num + neg) {
- *--str = hexchars[val % base];
- val = val / base;
- if (--prec <= 0 && val == 0)
- break;
- }
- switch (neg) {
- case 1:
- *--str = '-';
- break;
- case 2:
- *--str = 'x';
- *--str = '0';
- break;
- }
- len = num + sizeof(num) - 1 - str;
- } else {
- len = strlen(str);
- if (prec > 0 && len > prec)
- len = prec;
- }
- if (width > 0) {
- if (width > buflen)
- width = buflen;
- if ((n = width - len) > 0) {
- buflen -= n;
- for (; n > 0; --n)
- *buf++ = fillch;
- }
- }
- if (len > buflen)
- len = buflen;
- memcpy(buf, str, len);
- buf += len;
- buflen -= len;
- }
- *buf = 0;
- return buf - buf0;
-}
-
/*
* script_setenv - set an environment variable value to be used
* for scripts that we run (e.g. ip-up, auth-up, etc.)
}
}
} else {
+ /* no space allocated for script env. ptrs. yet */
i = 0;
script_env = (char **) malloc(16 * sizeof(char *));
if (script_env == 0)
}
/*
- * strlcpy - like strcpy/strncpy, doesn't overflow destination buffer,
- * always leaves destination null-terminated (for len > 0).
- */
-void
-strlcpy(char *dest, size_t len, const char *src)
-{
- if (len == 0)
- return;
- if (strlen(src) < len)
- strcpy(dest, src);
- else {
- strncpy(dest, src, len - 1);
- dest[len-1] = 0;
- }
-}
-
-/*
- * strlcat - like strcat/strncat, doesn't overflow destination buffer,
- * always leaves destination null-terminated (for len > 0).
+ * start_charshunt - create a child process to run the character shunt.
*/
-void
-strlcat(char *dest, size_t len, const char *src)
+static int
+start_charshunt(ifd, ofd)
+ int ifd, ofd;
{
- size_t dlen;
+ int cpid;
- if (len == 0)
- return;
- dlen = strlen(dest);
- if (dlen < len - 1)
- strlcpy(dest + dlen, len - dlen, src);
+ cpid = fork();
+ if (cpid == -1) {
+ error("Can't fork process for character shunt: %m");
+ return 0;
+ }
+ if (cpid == 0) {
+ /* child */
+ close(pty_slave);
+ setuid(uid);
+ if (getuid() != uid)
+ fatal("setuid failed");
+ setgid(getgid());
+ if (!nodetach)
+ log_to_fd = -1;
+ charshunt(ifd, ofd, record_file);
+ exit(0);
+ }
+ charshunt_pid = cpid;
+ close(pty_master);
+ pty_master = -1;
+ ttyfd = pty_slave;
+ record_child(cpid, "pppd (charshunt)", charshunt_done, NULL);
+ return 1;
}
-/*
- * logit - does the hard work for fatal et al.
- */
static void
-logit(level, fmt, args)
- int level;
- char *fmt;
- va_list args;
+charshunt_done(arg)
+ void *arg;
{
- int n;
- char buf[256];
- static char nl = '\n';
-
- n = vslprintf(buf, sizeof(buf), fmt, args);
- syslog(level, "%s", buf);
- if (log_to_stderr && (level != LOG_DEBUG || debug)) {
- if (write(2, buf, n) != n
- || (buf[n-1] != '\n' && write(2, &nl, 1) != 1))
- log_to_stderr = 0;
- }
+ charshunt_pid = 0;
}
/*
- * fatal - log an error message and die horribly.
+ * charshunt - the character shunt, which passes characters between
+ * the pty master side and the serial port (or stdin/stdout).
+ * This runs as the user (not as root).
+ * (We assume ofd >= ifd which is true the way this gets called. :-).
*/
-void
-fatal __V((char *fmt, ...))
+static void
+charshunt(ifd, ofd, record_file)
+ int ifd, ofd;
+ char *record_file;
{
- va_list pvar;
+ int n, nfds;
+ fd_set ready, writey;
+ u_char *ibufp, *obufp;
+ int nibuf, nobuf;
+ int flags;
+ int pty_readable, stdin_readable;
+ struct timeval lasttime;
+ FILE *recordf = NULL;
-#if __STDC__
- va_start(pvar, fmt);
-#else
- char *fmt;
- va_start(pvar);
- fmt = va_arg(pvar, char *);
+ /*
+ * Reset signal handlers.
+ */
+ signal(SIGHUP, SIG_IGN); /* Hangup */
+ signal(SIGINT, SIG_DFL); /* Interrupt */
+ signal(SIGTERM, SIG_DFL); /* Terminate */
+ signal(SIGCHLD, SIG_DFL);
+ signal(SIGUSR1, SIG_DFL);
+ signal(SIGUSR2, SIG_DFL);
+ signal(SIGABRT, SIG_DFL);
+ signal(SIGALRM, SIG_DFL);
+ signal(SIGFPE, SIG_DFL);
+ signal(SIGILL, SIG_DFL);
+ signal(SIGPIPE, SIG_DFL);
+ signal(SIGQUIT, SIG_DFL);
+ signal(SIGSEGV, SIG_DFL);
+#ifdef SIGBUS
+ signal(SIGBUS, SIG_DFL);
#endif
-
- logit(LOG_ERR, fmt, pvar);
- va_end(pvar);
-
- die(1); /* as promised */
-}
-
-/*
- * error - log an error message.
- */
-void
-error __V((char *fmt, ...))
-{
- va_list pvar;
-
-#if __STDC__
- va_start(pvar, fmt);
-#else
- char *fmt;
- va_start(pvar);
- fmt = va_arg(pvar, char *);
+#ifdef SIGEMT
+ signal(SIGEMT, SIG_DFL);
#endif
-
- logit(LOG_ERR, fmt, pvar);
- va_end(pvar);
-}
-
-/*
- * warn - log a warning message.
- */
-void
-warn __V((char *fmt, ...))
-{
- va_list pvar;
-
-#if __STDC__
- va_start(pvar, fmt);
-#else
- char *fmt;
- va_start(pvar);
- fmt = va_arg(pvar, char *);
+#ifdef SIGPOLL
+ signal(SIGPOLL, SIG_DFL);
#endif
-
- logit(LOG_WARNING, fmt, pvar);
- va_end(pvar);
-}
-
-/*
- * notice - log a notice-level message.
- */
-void
-notice __V((char *fmt, ...))
-{
- va_list pvar;
-
-#if __STDC__
- va_start(pvar, fmt);
-#else
- char *fmt;
- va_start(pvar);
- fmt = va_arg(pvar, char *);
+#ifdef SIGPROF
+ signal(SIGPROF, SIG_DFL);
+#endif
+#ifdef SIGSYS
+ signal(SIGSYS, SIG_DFL);
+#endif
+#ifdef SIGTRAP
+ signal(SIGTRAP, SIG_DFL);
+#endif
+#ifdef SIGVTALRM
+ signal(SIGVTALRM, SIG_DFL);
+#endif
+#ifdef SIGXCPU
+ signal(SIGXCPU, SIG_DFL);
+#endif
+#ifdef SIGXFSZ
+ signal(SIGXFSZ, SIG_DFL);
#endif
- logit(LOG_NOTICE, fmt, pvar);
- va_end(pvar);
-}
+ /*
+ * Open the record file if required.
+ */
+ if (record_file != NULL) {
+ recordf = fopen(record_file, "a");
+ if (recordf == NULL)
+ error("Couldn't create record file %s: %m", record_file);
+ }
-/*
- * info - log an informational message.
- */
-void
-info __V((char *fmt, ...))
-{
- va_list pvar;
+ /* set all the fds to non-blocking mode */
+ flags = fcntl(pty_master, F_GETFL);
+ if (flags == -1
+ || fcntl(pty_master, F_SETFL, flags | O_NONBLOCK) == -1)
+ warn("couldn't set pty master to nonblock: %m");
+ flags = fcntl(ifd, F_GETFL);
+ if (flags == -1
+ || fcntl(ifd, F_SETFL, flags | O_NONBLOCK) == -1)
+ warn("couldn't set %s to nonblock: %m", (ifd==0? "stdin": "tty"));
+ if (ofd != ifd) {
+ flags = fcntl(ofd, F_GETFL);
+ if (flags == -1
+ || fcntl(ofd, F_SETFL, flags | O_NONBLOCK) == -1)
+ warn("couldn't set stdout to nonblock: %m");
+ }
-#if __STDC__
- va_start(pvar, fmt);
-#else
- char *fmt;
- va_start(pvar);
- fmt = va_arg(pvar, char *);
-#endif
+ nibuf = nobuf = 0;
+ ibufp = obufp = NULL;
+ pty_readable = stdin_readable = 1;
+ nfds = (ofd > pty_master? ofd: pty_master) + 1;
+ if (recordf != NULL) {
+ gettimeofday(&lasttime, NULL);
+ putc(7, recordf); /* put start marker */
+ putc(lasttime.tv_sec >> 24, recordf);
+ putc(lasttime.tv_sec >> 16, recordf);
+ putc(lasttime.tv_sec >> 8, recordf);
+ putc(lasttime.tv_sec, recordf);
+ lasttime.tv_usec = 0;
+ }
- logit(LOG_INFO, fmt, pvar);
- va_end(pvar);
+ while (nibuf != 0 || nobuf != 0 || pty_readable || stdin_readable) {
+ FD_ZERO(&ready);
+ FD_ZERO(&writey);
+ if (nibuf != 0)
+ FD_SET(pty_master, &writey);
+ else if (stdin_readable)
+ FD_SET(ifd, &ready);
+ if (nobuf != 0)
+ FD_SET(ofd, &writey);
+ else if (pty_readable)
+ FD_SET(pty_master, &ready);
+ if (select(nfds, &ready, &writey, NULL, NULL) < 0) {
+ if (errno != EINTR)
+ fatal("select");
+ continue;
+ }
+ if (FD_ISSET(ifd, &ready)) {
+ ibufp = inpacket_buf;
+ nibuf = read(ifd, ibufp, sizeof(inpacket_buf));
+ if (nibuf < 0 && errno == EIO)
+ nibuf = 0;
+ if (nibuf < 0) {
+ if (!(errno == EINTR || errno == EAGAIN)) {
+ error("Error reading standard input: %m");
+ break;
+ }
+ nibuf = 0;
+ } else if (nibuf == 0) {
+ /* end of file from stdin */
+ stdin_readable = 0;
+ /* do a 0-length write, hopefully this will generate
+ an EOF (hangup) on the slave side. */
+ write(pty_master, inpacket_buf, 0);
+ if (recordf)
+ if (!record_write(recordf, 4, NULL, 0, &lasttime))
+ recordf = NULL;
+ } else {
+ FD_SET(pty_master, &writey);
+ if (recordf)
+ if (!record_write(recordf, 2, ibufp, nibuf, &lasttime))
+ recordf = NULL;
+ }
+ }
+ if (FD_ISSET(pty_master, &ready)) {
+ obufp = outpacket_buf;
+ nobuf = read(pty_master, obufp, sizeof(outpacket_buf));
+ if (nobuf < 0 && errno == EIO)
+ nobuf = 0;
+ if (nobuf < 0) {
+ if (!(errno == EINTR || errno == EAGAIN)) {
+ error("Error reading pseudo-tty master: %m");
+ break;
+ }
+ nobuf = 0;
+ } else if (nobuf == 0) {
+ /* end of file from the pty - slave side has closed */
+ pty_readable = 0;
+ stdin_readable = 0; /* pty is not writable now */
+ nibuf = 0;
+ close(ofd);
+ if (recordf)
+ if (!record_write(recordf, 3, NULL, 0, &lasttime))
+ recordf = NULL;
+ } else {
+ FD_SET(ofd, &writey);
+ if (recordf)
+ if (!record_write(recordf, 1, obufp, nobuf, &lasttime))
+ recordf = NULL;
+ }
+ }
+ if (FD_ISSET(ofd, &writey)) {
+ n = write(ofd, obufp, nobuf);
+ if (n < 0) {
+ if (errno != EIO) {
+ error("Error writing standard output: %m");
+ break;
+ }
+ pty_readable = 0;
+ nobuf = 0;
+ } else {
+ obufp += n;
+ nobuf -= n;
+ }
+ }
+ if (FD_ISSET(pty_master, &writey)) {
+ n = write(pty_master, ibufp, nibuf);
+ if (n < 0) {
+ if (errno != EIO) {
+ error("Error writing pseudo-tty master: %m");
+ break;
+ }
+ stdin_readable = 0;
+ nibuf = 0;
+ } else {
+ ibufp += n;
+ nibuf -= n;
+ }
+ }
+ }
+ exit(0);
}
-/*
- * dbglog - log a debug message.
- */
-void
-dbglog __V((char *fmt, ...))
+static int
+record_write(f, code, buf, nb, tp)
+ FILE *f;
+ int code;
+ u_char *buf;
+ int nb;
+ struct timeval *tp;
{
- va_list pvar;
-
-#if __STDC__
- va_start(pvar, fmt);
-#else
- char *fmt;
- va_start(pvar);
- fmt = va_arg(pvar, char *);
-#endif
-
- logit(LOG_DEBUG, fmt, pvar);
- va_end(pvar);
+ struct timeval now;
+ int diff;
+
+ gettimeofday(&now, NULL);
+ now.tv_usec /= 100000; /* actually 1/10 s, not usec now */
+ diff = (now.tv_sec - tp->tv_sec) * 10 + (now.tv_usec - tp->tv_usec);
+ if (diff > 0) {
+ if (diff > 255) {
+ putc(5, f);
+ putc(diff >> 24, f);
+ putc(diff >> 16, f);
+ putc(diff >> 8, f);
+ putc(diff, f);
+ } else {
+ putc(6, f);
+ putc(diff, f);
+ }
+ *tp = now;
+ }
+ putc(code, f);
+ if (buf != NULL) {
+ putc(nb >> 8, f);
+ putc(nb, f);
+ fwrite(buf, nb, 1, f);
+ }
+ fflush(f);
+ if (ferror(f)) {
+ error("Error writing record file: %m");
+ return 0;
+ }
+ return 1;
}
projects / ppp.git / blobdiff