1359 lines
31 KiB
C
1359 lines
31 KiB
C
/*
|
|
* main.c - Point-to-Point Protocol main module
|
|
*
|
|
* Fairly patched version for isdn4linux
|
|
* copyright (c) 1995,1996,1997 of all patches by Michael Hipp
|
|
* still no warranties (see disclaimer)
|
|
*
|
|
* Copyright (c) 1989 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.
|
|
*/
|
|
|
|
/*
|
|
* PATCHLEVEL 9
|
|
*/
|
|
|
|
char main_rcsid[] = "$Id: main.c,v 1.16 1999/06/21 13:28:49 hipp Exp $";
|
|
|
|
#include <stdio.h>
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <signal.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <syslog.h>
|
|
#include <netdb.h>
|
|
#include <utmp.h>
|
|
#include <pwd.h>
|
|
#include <unistd.h>
|
|
#include <ctype.h>
|
|
#include <sys/param.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/time.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/socket.h>
|
|
#include </usr/include/net/if.h>
|
|
|
|
#include "fsm.h"
|
|
#include "ipppd.h"
|
|
#include "magic.h"
|
|
#include "lcp.h"
|
|
#include "ipcp.h"
|
|
#include "ipxcp.h"
|
|
#include "environ.h"
|
|
|
|
#include "upap.h"
|
|
#include "chap.h"
|
|
#include "cbcp.h"
|
|
#include "ccp.h"
|
|
#include "pathnames.h"
|
|
#include "patchlevel.h"
|
|
#include "protos.h"
|
|
|
|
/*
|
|
* If REQ_SYSOPTIONS is defined to 1, pppd will not run unless
|
|
* /etc/ppp/ioptions exists.
|
|
*/
|
|
#ifndef REQ_SYSOPTIONS
|
|
#define REQ_SYSOPTIONS 1
|
|
#endif
|
|
|
|
/* interface vars */
|
|
|
|
extern void make_options_global(int slot);
|
|
char pidfilename[MAXPATHLEN]; /* name of pid file */
|
|
char *progname; /* Name of this program */
|
|
char hostname[MAXNAMELEN]; /* Our hostname */
|
|
static pid_t pid; /* Our pid */
|
|
|
|
static uid_t uid; /* Our real user-id */
|
|
|
|
struct link_struct lns[NUM_PPP];
|
|
int numdev = 0;
|
|
|
|
int kill_link = 0;
|
|
|
|
u_char outpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for outgoing packet */
|
|
static u_char inpacket_buf[PPP_MRU+PPP_HDRLEN]; /* buffer for incoming packet */
|
|
|
|
static int n_children; /* # child processes still running */
|
|
int baud_rate;
|
|
char *no_ppp_msg = "Sorry - this system lacks PPP kernel support.\n"
|
|
"Check whether you configured at least the ippp0 device!\n";
|
|
|
|
/* prototypes */
|
|
static void hup(int);
|
|
static void term(int);
|
|
static void chld(int);
|
|
static void toggle_debug(int);
|
|
static void reload_param(int);
|
|
static void bad_signal(int);
|
|
static void get_input(int);
|
|
static void connect_time_expired(caddr_t);
|
|
static int init_unit(int);
|
|
static int exit_unit(int);
|
|
|
|
void remote_sys_options __P((void));
|
|
void reload_config(void);
|
|
|
|
extern char *ttyname __P((int));
|
|
extern char *getlogin __P((void));
|
|
extern int daemon(int,int);
|
|
|
|
#ifdef ultrix
|
|
#undef O_NONBLOCK
|
|
#define O_NONBLOCK O_NDELAY
|
|
#endif
|
|
|
|
/*
|
|
* PPP Data Link Layer "protocol" table.
|
|
* One entry per supported protocol.
|
|
* The last entry must be NULL.
|
|
*/
|
|
struct protent *protocols[] = {
|
|
&lcp_protent,
|
|
&pap_protent,
|
|
&chap_protent,
|
|
&cbcp_protent,
|
|
&ipcp_protent,
|
|
&ccp_protent,
|
|
&ccp_link_protent,
|
|
&ipxcp_protent,
|
|
NULL
|
|
};
|
|
|
|
int main(int argc,char **argv)
|
|
{
|
|
int i,j;
|
|
struct sigaction sa;
|
|
#if 0
|
|
struct cmd *cmdp;
|
|
#endif
|
|
FILE *pidfile;
|
|
struct timeval timo;
|
|
sigset_t mask;
|
|
struct protent *protp;
|
|
|
|
if(argc > 1 && !strcmp(argv[1],"-version")) {
|
|
#ifndef RADIUS
|
|
fprintf(stderr,"ipppd %s.%d (isdn4linux version of pppd by MH) started\n", VERSION, PATCHLEVEL);
|
|
#else
|
|
fprintf(stderr,"ipppd %s.%d (isdn4linux version of pppd with RADIUS extension by mla) started\n", VERSION, PATCHLEVEL);
|
|
#endif
|
|
|
|
fprintf(stderr,"%s\n%s\n%s\n%s\n%s\n",lcp_rcsid,ipcp_rcsid,ipxcp_rcsid,ccp_rcsid,magic_rcsid);
|
|
fprintf(stderr,"%s\n%s\n%s\n%s\n",chap_rcsid,upap_rcsid,main_rcsid,options_rcsid);
|
|
fprintf(stderr,"%s\n%s\n%s\n",fsm_rcsid,cbcp_rcsid,sys_rcsid);
|
|
#ifdef USE_MSCHAP
|
|
fprintf(stderr,"%s\n",chap_ms_rcsid);
|
|
#endif
|
|
exit(1);
|
|
}
|
|
|
|
for(i=0;i<NUM_PPP;i++) {
|
|
lns[i].openfails = 0;
|
|
lns[i].initfdflags = -1;
|
|
lns[i].hungup = 1;
|
|
lns[i].bundle_next = &lns[i];
|
|
lns[i].ifname[0] = 0;
|
|
lns[i].ifunit = -1;
|
|
lns[i].phase = PHASE_WAIT;
|
|
lns[i].fd = -1;
|
|
lns[i].logged_in = 0;
|
|
lns[i].lcp_unit = lns[i].ipcp_unit = lns[i].ccp_unit = -1;
|
|
lns[i].cbcp_unit = lns[i].ccp_l_unit = -1;
|
|
lns[i].ipxcp_unit = -1;
|
|
lns[i].unit = i;
|
|
lns[i].chap_unit = lns[i].upap_unit = -1;
|
|
lns[i].auth_up_script = 0;
|
|
lns[i].attempts = 0;
|
|
}
|
|
|
|
if (gethostname(hostname, MAXNAMELEN) < 0 ) {
|
|
perror("couldn't get hostname");
|
|
die(1);
|
|
}
|
|
hostname[MAXNAMELEN-1] = 0;
|
|
|
|
pidfilename[0] = 0;
|
|
uid = getuid();
|
|
|
|
/*
|
|
* Initialize to the standard option set, then parse, in order,
|
|
* the system options file, the user's options file, and the command
|
|
* line arguments.
|
|
*/
|
|
progname = *argv;
|
|
|
|
for (i = 0; (protp = protocols[i]) != NULL; i++)
|
|
for(j=0;j<NUM_PPP;j++)
|
|
(*protp->init)(j); /* modifies our options .. !!!! */
|
|
|
|
#ifdef OPTIONS_TTY_FIRST
|
|
if (!options_from_file(_PATH_SYSOPTIONS, REQ_SYSOPTIONS, 0, 0 ) ||
|
|
!options_for_tty() ||
|
|
!parse_args(argc-1, argv+1))
|
|
#else
|
|
if (!options_from_file(_PATH_SYSOPTIONS, REQ_SYSOPTIONS, 0 , 0) ||
|
|
!parse_args(argc-1, argv+1) || !options_for_tty() )
|
|
#endif
|
|
die(1);
|
|
|
|
/*
|
|
* copy protocol options for unit 0 to all option fields
|
|
*/
|
|
make_options_global(0);
|
|
|
|
if (!ppp_available()) {
|
|
fprintf(stderr, no_ppp_msg);
|
|
exit(1);
|
|
}
|
|
|
|
remove_sys_options();
|
|
check_auth_options();
|
|
setipdefault();
|
|
|
|
sys_init(); /* init log stuff and open socket for ioctl commands */
|
|
|
|
if(!numdev) {
|
|
fprintf(stderr,"ipppd: No devices found.\n");
|
|
die(1);
|
|
}
|
|
else {
|
|
char devstr[1024];
|
|
sprintf(devstr,"Found %d device%s: ",numdev, numdev==1?"":"s");
|
|
for(i=0;i<numdev;i++)
|
|
{
|
|
strcat(devstr,lns[i].devnam);
|
|
if (i < numdev - 1)
|
|
strcat(devstr,", ");
|
|
}
|
|
syslog(LOG_NOTICE,devstr);
|
|
}
|
|
|
|
/*
|
|
* Initialize magic number package.
|
|
*/
|
|
magic_init();
|
|
|
|
/*
|
|
* Detach ourselves from the terminal, if required,
|
|
* and identify who is running us.
|
|
*/
|
|
if (!nodetach) {
|
|
int a,f;
|
|
|
|
f = fork();
|
|
if(f < 0) {
|
|
perror("Couldn't detach from controlling terminal");
|
|
exit(1);
|
|
}
|
|
if(f)
|
|
exit(0);
|
|
setsid();
|
|
chdir("/");
|
|
a = open("/dev/null",O_RDWR);
|
|
if(a < 0) {
|
|
perror("Couldn't open /dev/null");
|
|
exit(1);
|
|
}
|
|
dup2(a,0);
|
|
dup2(a,1);
|
|
dup2(a,2);
|
|
close(a);
|
|
}
|
|
|
|
pid = getpid();
|
|
|
|
/* write pid to file */
|
|
if(!strlen(pidfilename))
|
|
#if 0 /* old style, default is to use same pidfile for all devices */
|
|
sprintf(pidfilename, "%s%s.pid", _PATH_VARRUN, "ipppd" );
|
|
#else /* new style, incorporate device name into pidfile (like mgetty does) */
|
|
{
|
|
char *p;
|
|
if ((p = strrchr(lns[0].devnam, '/')))
|
|
p++;
|
|
else
|
|
p = lns[0].devnam;
|
|
sprintf(pidfilename, "%s%s.%s.pid", _PATH_VARRUN, "ipppd", p);
|
|
}
|
|
#endif
|
|
|
|
if ((pidfile = fopen(pidfilename, "w")) != NULL) {
|
|
fprintf(pidfile, "%d\n", pid);
|
|
fclose(pidfile);
|
|
} else {
|
|
syslog(LOG_ERR, "Failed to create pid file %s: %m", pidfilename);
|
|
pidfilename[0] = 0;
|
|
}
|
|
|
|
syslog(LOG_NOTICE, "ipppd %s.%d (isdn4linux version of pppd by MH) started", VERSION, PATCHLEVEL);
|
|
|
|
/*
|
|
* 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);
|
|
|
|
#define SIGNAL(s, handler) { \
|
|
sa.sa_handler = handler; \
|
|
if (sigaction(s, &sa, NULL) < 0) { \
|
|
syslog(LOG_ERR, "Couldn't establish signal handler (%d): %m", s); \
|
|
die(1); \
|
|
} \
|
|
}
|
|
|
|
sa.sa_mask = mask;
|
|
sa.sa_flags = 0;
|
|
SIGNAL(SIGHUP, hup); /* Hangup */
|
|
SIGNAL(SIGINT, term); /* Interrupt */
|
|
SIGNAL(SIGTERM, term); /* Terminate */
|
|
SIGNAL(SIGCHLD, chld);
|
|
|
|
SIGNAL(SIGUSR1, toggle_debug); /* Toggle debug flag */
|
|
SIGNAL(SIGUSR2, reload_param); /* reload parameters */
|
|
|
|
/*
|
|
* Install a handler for other signals which would otherwise
|
|
* cause pppd to exit without cleaning up.
|
|
*/
|
|
SIGNAL(SIGABRT, bad_signal);
|
|
SIGNAL(SIGALRM, bad_signal);
|
|
SIGNAL(SIGFPE, bad_signal);
|
|
SIGNAL(SIGILL, bad_signal);
|
|
SIGNAL(SIGPIPE, bad_signal);
|
|
SIGNAL(SIGQUIT, bad_signal);
|
|
SIGNAL(SIGSEGV, bad_signal);
|
|
#ifdef SIGBUS
|
|
SIGNAL(SIGBUS, bad_signal);
|
|
#endif
|
|
#ifdef SIGEMT
|
|
SIGNAL(SIGEMT, bad_signal);
|
|
#endif
|
|
#ifdef SIGPOLL
|
|
SIGNAL(SIGPOLL, bad_signal);
|
|
#endif
|
|
#ifdef SIGPROF
|
|
SIGNAL(SIGPROF, bad_signal);
|
|
#endif
|
|
#ifdef SIGSYS
|
|
SIGNAL(SIGSYS, bad_signal);
|
|
#endif
|
|
#ifdef SIGTRAP
|
|
SIGNAL(SIGTRAP, bad_signal);
|
|
#endif
|
|
#ifdef SIGVTALRM
|
|
SIGNAL(SIGVTALRM, bad_signal);
|
|
#endif
|
|
#ifdef SIGXCPU
|
|
SIGNAL(SIGXCPU, bad_signal);
|
|
#endif
|
|
#ifdef SIGXFSZ
|
|
SIGNAL(SIGXFSZ, bad_signal);
|
|
#endif
|
|
|
|
for(i=0;i<numdev;i++) {
|
|
if(lns[i].fd == -1) {
|
|
syslog(LOG_NOTICE,"init_unit: %d\n",i);
|
|
if(init_unit(i) < 0) {
|
|
/* Error */
|
|
}
|
|
}
|
|
}
|
|
|
|
for(;!kill_link;) {
|
|
fd_set ready;
|
|
int n,i,max=-1;
|
|
|
|
FD_ZERO(&ready);
|
|
for(i=0;i<numdev;i++)
|
|
if(lns[i].fd >= 0) {
|
|
if(lns[i].fd > max)
|
|
max = lns[i].fd;
|
|
FD_SET(lns[i].fd, &ready);
|
|
}
|
|
|
|
n = select(max+1, &ready, NULL, NULL, timeleft(&timo) );
|
|
if (n < 0 && errno != EINTR) {
|
|
syslog(LOG_ERR, "select: %m");
|
|
die(1);
|
|
}
|
|
|
|
calltimeout();
|
|
|
|
for(i=0;i<numdev && n>0;i++) {
|
|
if(lns[i].fd >= 0 && FD_ISSET(lns[i].fd,&ready)) {
|
|
/* n--; */
|
|
if(lns[i].phase == PHASE_WAIT) {
|
|
/* ok, now we (usually) have a unit */
|
|
lns[i].hungup = 0;
|
|
establish_ppp(i);
|
|
if(maxconnect > 0)
|
|
timeout(connect_time_expired, (void *)(long)i, maxconnect);
|
|
|
|
syslog(LOG_NOTICE,"PHASE_WAIT -> PHASE_ESTABLISHED, ifunit: %d, linkunit: %d, fd: %d",lns[i].ifunit,i,lns[i].fd);
|
|
lcp_open(lns[i].lcp_unit);
|
|
lns[i].phase = PHASE_ESTABLISH;
|
|
}
|
|
get_input(i);
|
|
}
|
|
}
|
|
reap_kids(); /* Don't leave dead kids lying around */
|
|
for(i=0;i<numdev;i++)
|
|
if(kill_link || lns[i].phase == PHASE_DEAD) {
|
|
if(!kill_link)
|
|
syslog(LOG_NOTICE,"taking down PHASE_DEAD link %d, linkunit: %d",i,lns[i].unit);
|
|
untimeout(connect_time_expired,(void *) (long)i);
|
|
lcp_close(lns[i].lcp_unit,"link closed");
|
|
lcp_lowerdown(lns[i].lcp_unit);
|
|
lcp_freeunit(lns[i].lcp_unit);
|
|
if(debug)
|
|
syslog(LOG_NOTICE,"LCP is down");
|
|
exit_unit(i);
|
|
syslog(LOG_NOTICE,"link %d closed , linkunit: %d",i,lns[i].unit);
|
|
lns[i].phase = PHASE_WAIT;
|
|
}
|
|
if(!kill_link) {
|
|
for(i=0;i<numdev;i++)
|
|
if(lns[i].fd == -1) {
|
|
syslog(LOG_NOTICE,"reinit_unit: %d\n",i);
|
|
if(init_unit(i) < 0) { /* protokolle hier neu initialisieren?? */
|
|
/* error */
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
if (unlink(pidfilename) < 0 && errno != ENOENT)
|
|
syslog(LOG_WARNING, "unable to delete pid file: %m");
|
|
pidfilename[0] = 0;
|
|
die(0);
|
|
return 0; /*NOTREACHED*/
|
|
}
|
|
|
|
/*
|
|
* initialize unit
|
|
*/
|
|
|
|
static int init_unit(int linkunit)
|
|
{
|
|
if ((lns[linkunit].fd = open(lns[linkunit].devnam, O_NONBLOCK | O_RDWR, 0)) < 0) {
|
|
if(errno == ENOENT) {
|
|
syslog(LOG_ERR, "[%d] Failed to open %s: %m -> Disabling this unit",linkunit,lns[linkunit].devnam);
|
|
syslog(LOG_NOTICE, "[%d] Failed to open %s: %m -> Disabling this unit",linkunit,lns[linkunit].devnam);
|
|
lns[linkunit].fd = -2;
|
|
} else {
|
|
syslog(LOG_ERR, "[%d] Failed to open %s: %m",linkunit,lns[linkunit].devnam);
|
|
syslog(LOG_NOTICE, "[%d] Failed to open %s: %m",linkunit,lns[linkunit].devnam);
|
|
lns[linkunit].fd = -1;
|
|
}
|
|
/* maybe we should start a timer here to retry the open after a few seconds */
|
|
|
|
lns[linkunit].openfails++;
|
|
if(lns[linkunit].openfails >= 16) {
|
|
syslog(LOG_ERR, "Too much open fails on %s: %m", lns[linkunit].devnam);
|
|
lns[linkunit].fd = -2;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
if ((lns[linkunit].initfdflags = fcntl(lns[linkunit].fd, F_GETFL)) == -1) {
|
|
syslog(LOG_ERR, "Couldn't get device fd flags: %m");
|
|
lns[linkunit].fd = -2;
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Set device for non-blocking reads.
|
|
*/
|
|
if (fcntl(lns[linkunit].fd, F_SETFL, lns[linkunit].initfdflags | O_NONBLOCK) == -1) {
|
|
syslog(LOG_ERR, "Couldn't set device to non-blocking mode: %m");
|
|
lns[linkunit].fd = -2;
|
|
return -1;
|
|
}
|
|
syslog(LOG_NOTICE, "Connect[%d]: %s, fd: %d",linkunit, lns[linkunit].devnam,lns[linkunit].fd);
|
|
|
|
set_kdebugflag (kdebugflag,linkunit);
|
|
|
|
lns[linkunit].openfails = 0;
|
|
lns[linkunit].auth_up_script = 0;
|
|
lns[linkunit].attempts = 0;
|
|
lns[linkunit].hungup = 1;
|
|
lns[linkunit].lcp_unit = lcp_getunit(linkunit);
|
|
/*
|
|
* give the same unit number to chap,upap
|
|
*/
|
|
lns[linkunit].upap_unit = lns[linkunit].chap_unit = lns[linkunit].lcp_unit;
|
|
upap[lns[linkunit].upap_unit].us_unit = chap[lns[linkunit].chap_unit].unit = linkunit;
|
|
lcp_lowerup(lns[linkunit].lcp_unit);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int exit_unit(int the_unit)
|
|
{
|
|
if (lns[the_unit].initfdflags != -1) {
|
|
lns[the_unit].initfdflags &= ~O_NONBLOCK;
|
|
if(fcntl(lns[the_unit].fd, F_SETFL, lns[the_unit].initfdflags) < 0)
|
|
syslog(LOG_ERR,"Failed to set %s back to blocking mode %m",lns[the_unit].devnam);
|
|
lns[the_unit].initfdflags = -1;
|
|
}
|
|
close_fd(the_unit);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* connect_time_expired - log a message and close the connection.
|
|
*/
|
|
static void connect_time_expired(caddr_t arg)
|
|
{
|
|
int linkunit = (int)(long)arg;
|
|
syslog(LOG_INFO, "Connect time expired");
|
|
lcp_close(linkunit, "Connect time expired"); /* Close connection */
|
|
}
|
|
|
|
char *protocol2name(int p)
|
|
{
|
|
int top = (sizeof(protonames) / sizeof(struct protos));
|
|
int bottom = 0;
|
|
int pos = top >> 1;
|
|
int step = (pos+1) >> 1;
|
|
|
|
while(pos < top && pos >= bottom) {
|
|
if(protonames[pos].val == p)
|
|
return protonames[pos].name;
|
|
if(protonames[pos].val > p) {
|
|
top = pos;
|
|
pos -= step;
|
|
step = (step+1)>>1;
|
|
}
|
|
else {
|
|
bottom = pos + 1;
|
|
pos += step;
|
|
step = (step+1)>>1;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* get_input - called when incoming data is available.
|
|
*/
|
|
static void get_input(int linkunit)
|
|
{
|
|
int len, i;
|
|
u_char *p;
|
|
u_short protocol;
|
|
struct protent *protp;
|
|
|
|
p = inpacket_buf; /* point to beginning of packet buffer */
|
|
|
|
len = read_packet(inpacket_buf,linkunit);
|
|
if (len < 0)
|
|
return;
|
|
|
|
if (len == 0) {
|
|
syslog(LOG_NOTICE, "Modem hangup");
|
|
lns[linkunit].hungup = 1;
|
|
#if 0
|
|
lcp_lowerdown(lns[linkunit].lcp_unit); /* serial link is no longer available */
|
|
#endif
|
|
link_terminated(linkunit);
|
|
return;
|
|
}
|
|
|
|
if (debug)
|
|
log_packet(p, len, "rcvd ",linkunit);
|
|
|
|
if (len < PPP_HDRLEN) {
|
|
MAINDEBUG((LOG_INFO, "io(): Received short packet."));
|
|
return;
|
|
}
|
|
|
|
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[lns[linkunit].lcp_unit].state != OPENED) {
|
|
MAINDEBUG((LOG_INFO,
|
|
"io(): Received non-LCP packet when LCP not open."));
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Upcall the proper protocol input routine.
|
|
*/
|
|
|
|
for (i = 0; (protp = protocols[i]) != NULL; ++i) {
|
|
if (protp->protocol == protocol && protp->enabled_flag) {
|
|
(*protp->input)(linkunit, p, len);
|
|
return;
|
|
}
|
|
if (protocol == (protp->protocol & ~0x8000) && protp->enabled_flag
|
|
&& protp->datainput != NULL) {
|
|
(*protp->datainput)(linkunit, p, len);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (debug) {
|
|
char *s;
|
|
s = protocol2name(protocol);
|
|
if(!s)
|
|
syslog(LOG_WARNING, "Unknown protocol (0x%x) received", protocol);
|
|
else
|
|
syslog(LOG_WARNING, "Unsupported protocol '%s' (0x%x) received", s,protocol);
|
|
}
|
|
lcp_sprotrej(linkunit, p - PPP_HDRLEN, len + PPP_HDRLEN);
|
|
}
|
|
|
|
|
|
/*
|
|
* demuxprotrej - Demultiplex a Protocol-Reject.
|
|
*/
|
|
void demuxprotrej(int linkunit,u_short protocol)
|
|
{
|
|
int i;
|
|
struct protent *protp;
|
|
|
|
/*
|
|
* Upcall the proper Protocol-Reject routine.
|
|
*/
|
|
for (i = 0; (protp = protocols[i]) != NULL; ++i) {
|
|
if (protp->protocol == protocol) {
|
|
(*protp->protrej)(linkunit);
|
|
return;
|
|
}
|
|
}
|
|
|
|
syslog(LOG_WARNING,
|
|
"demuxprotrej: Unrecognized Protocol-Reject for protocol 0x%x",
|
|
protocol);
|
|
}
|
|
|
|
|
|
/*
|
|
* bad_signal - We've caught a fatal signal. Clean up state and exit.
|
|
*/
|
|
static void bad_signal(int sig)
|
|
{
|
|
syslog(LOG_ERR, "Fatal signal %d", sig);
|
|
die(1);
|
|
}
|
|
|
|
/*
|
|
* die - like quit, except we can specify an exit status.
|
|
*/
|
|
void die(int status)
|
|
{
|
|
int i;
|
|
for(i=0;i<numdev;i++)
|
|
cleanup(0, NULL,i);
|
|
syslog(LOG_INFO, "Exit.");
|
|
exit(status);
|
|
}
|
|
|
|
/*
|
|
* cleanup - restore anything which needs to be restored before we exit
|
|
*/
|
|
/* ARGSUSED */
|
|
void cleanup(int status,caddr_t arg,int tu)
|
|
{
|
|
if (lns[tu].fd >= 0)
|
|
close_fd(tu);
|
|
|
|
if (pidfilename[0] != 0 && unlink(pidfilename) < 0 && errno != ENOENT)
|
|
syslog(LOG_WARNING, "unable to delete pid file: %m");
|
|
pidfilename[0] = 0;
|
|
|
|
#if 0
|
|
if (lockflag)
|
|
unlock();
|
|
#endif
|
|
|
|
}
|
|
|
|
/*
|
|
* close_fd - restore the terminal device and close it.
|
|
*/
|
|
void close_fd(int tu)
|
|
{
|
|
if (lns[tu].initfdflags != -1 && fcntl(lns[tu].fd, F_SETFL, lns[tu].initfdflags) < 0)
|
|
syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
|
|
lns[tu].initfdflags = -1;
|
|
syslog(LOG_INFO, "closing fd %d from unit %d",lns[tu].fd,tu);
|
|
close(lns[tu].fd);
|
|
lns[tu].fd = -1;
|
|
}
|
|
|
|
|
|
struct callout {
|
|
struct timeval c_time; /* time at which to call routine */
|
|
caddr_t c_arg; /* argument to routine */
|
|
void (*c_func)(); /* routine */
|
|
struct callout *c_next;
|
|
};
|
|
|
|
static struct callout *callout = NULL; /* Callout list */
|
|
static struct timeval timenow; /* Current time */
|
|
|
|
/*
|
|
* timeout - Schedule a timeout.
|
|
*
|
|
* Note that this timeout takes the number of seconds, NOT hz (as in
|
|
* the kernel).
|
|
*/
|
|
void timeout(void (*func)(),caddr_t arg,int time)
|
|
{
|
|
struct callout *newp, *p, **pp;
|
|
|
|
MAINDEBUG((LOG_DEBUG, "Timeout %lx:%lx in %d seconds.",
|
|
(long) func, (long) arg, time));
|
|
|
|
/*
|
|
* Allocate timeout.
|
|
*/
|
|
if ((newp = (struct callout *) malloc(sizeof(struct callout))) == NULL) {
|
|
syslog(LOG_ERR, "Out of memory in timeout()!");
|
|
die(1);
|
|
}
|
|
newp->c_arg = arg;
|
|
newp->c_func = func;
|
|
gettimeofday(&timenow, NULL);
|
|
newp->c_time.tv_sec = timenow.tv_sec + time;
|
|
newp->c_time.tv_usec = timenow.tv_usec;
|
|
|
|
/*
|
|
* Find correct place and link it in.
|
|
*/
|
|
for (pp = &callout; (p = *pp); pp = &p->c_next) {
|
|
if (newp->c_time.tv_sec < p->c_time.tv_sec
|
|
|| (newp->c_time.tv_sec == p->c_time.tv_sec
|
|
&& newp->c_time.tv_usec < p->c_time.tv_sec))
|
|
break;
|
|
}
|
|
newp->c_next = p;
|
|
*pp = newp;
|
|
}
|
|
|
|
|
|
/*
|
|
* untimeout - Unschedule a timeout.
|
|
*/
|
|
void untimeout(void (*func)(),caddr_t arg)
|
|
{
|
|
struct callout **copp, *freep;
|
|
|
|
MAINDEBUG((LOG_DEBUG, "Untimeout %lx:%lx.", (long) func, (long) arg));
|
|
|
|
/*
|
|
* Find first matching timeout and remove it from the list.
|
|
*/
|
|
for (copp = &callout; (freep = *copp); copp = &freep->c_next)
|
|
if (freep->c_func == func && freep->c_arg == arg) {
|
|
*copp = freep->c_next;
|
|
free((char *) freep);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* calltimeout - Call any timeout routines which are now due.
|
|
*/
|
|
void calltimeout()
|
|
{
|
|
struct callout *p;
|
|
|
|
while (callout != NULL) {
|
|
p = callout;
|
|
|
|
if (gettimeofday(&timenow, NULL) < 0) {
|
|
syslog(LOG_ERR, "Failed to get time of day: %m");
|
|
die(1);
|
|
}
|
|
if (!(p->c_time.tv_sec < timenow.tv_sec
|
|
|| (p->c_time.tv_sec == timenow.tv_sec
|
|
&& p->c_time.tv_usec <= timenow.tv_usec)))
|
|
break; /* no, it's not time yet */
|
|
|
|
callout = p->c_next;
|
|
(*p->c_func)(p->c_arg);
|
|
|
|
free((char *) p);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* timeleft - return the length of time until the next timeout is due.
|
|
*/
|
|
struct timeval *
|
|
timeleft(tvp)
|
|
struct timeval *tvp;
|
|
{
|
|
if (callout == NULL)
|
|
return NULL;
|
|
|
|
gettimeofday(&timenow, NULL);
|
|
tvp->tv_sec = callout->c_time.tv_sec - timenow.tv_sec;
|
|
tvp->tv_usec = callout->c_time.tv_usec - timenow.tv_usec;
|
|
if (tvp->tv_usec < 0) {
|
|
tvp->tv_usec += 1000000;
|
|
tvp->tv_sec -= 1;
|
|
}
|
|
if (tvp->tv_sec < 0)
|
|
tvp->tv_sec = tvp->tv_usec = 0;
|
|
|
|
return tvp;
|
|
}
|
|
|
|
|
|
/*
|
|
* hup - Catch SIGHUP signal.
|
|
*
|
|
* Indicates that the physical layer has been disconnected.
|
|
* We don't rely on this indication; if the user has sent this
|
|
* signal, we just take the link down.
|
|
*/
|
|
static void hup(int sig)
|
|
{
|
|
syslog(LOG_INFO, "Hangup (SIGHUP)");
|
|
/* kill_link = 1; */
|
|
}
|
|
|
|
|
|
/*
|
|
* term - Catch SIGTERM signal and SIGINT signal (^C/del).
|
|
*
|
|
* Indicates that we should initiate a graceful disconnect and exit.
|
|
*/
|
|
static void term(int sig)
|
|
{
|
|
syslog(LOG_INFO, "Terminating on signal %d.", sig);
|
|
kill_link = 1;
|
|
}
|
|
|
|
|
|
/*
|
|
* chld - Catch SIGCHLD signal.
|
|
* Calls reap_kids to get status for any dead kids.
|
|
*/
|
|
static void chld(int sig)
|
|
{
|
|
reap_kids();
|
|
}
|
|
|
|
/*
|
|
* toggle_debug - Catch SIGUSR1 signal.
|
|
*
|
|
* Toggle debug flag.
|
|
*/
|
|
static void toggle_debug(int sig)
|
|
{
|
|
debug = !debug;
|
|
note_debug_level();
|
|
}
|
|
|
|
|
|
/*
|
|
* reload param - Catch SIGUSR2 signal.
|
|
*/
|
|
static void reload_param(int sig)
|
|
{
|
|
reload_config();
|
|
}
|
|
|
|
|
|
/*
|
|
* run-program - execute a program with given arguments,
|
|
* but don't wait for it.
|
|
* If the program can't be executed, logs an error unless
|
|
* must_exist is 0 and the program file doesn't exist.
|
|
*/
|
|
int run_program(char *prog,char **args,int must_exist,int unit)
|
|
{
|
|
int pid;
|
|
char *nullenv[1];
|
|
char **envtouse;
|
|
|
|
pid = fork();
|
|
if (pid < 0) {
|
|
syslog(LOG_ERR, "Failed to create child process for %s: %m", prog);
|
|
return -1;
|
|
}
|
|
|
|
if (pid == 0) {
|
|
int i,new_fd;
|
|
|
|
setsid();
|
|
umask (S_IRWXG|S_IRWXO);
|
|
chdir ("/");
|
|
setuid(geteuid());
|
|
setgid(getegid());
|
|
|
|
close (0);
|
|
close (1);
|
|
close (2);
|
|
for(i=0;i<NUM_PPP;i++)
|
|
if(lns[i].fd >= 0)
|
|
close(lns[i].fd);
|
|
|
|
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 */
|
|
}
|
|
|
|
nullenv[0] = NULL;
|
|
if (script_env)
|
|
envtouse = script_env;
|
|
else
|
|
envtouse = nullenv;
|
|
execve(prog, args, envtouse);
|
|
if (must_exist || errno != ENOENT)
|
|
syslog(LOG_WARNING, "Can't execute %s: %m", prog);
|
|
exit(99); /* CHILD exit */
|
|
}
|
|
MAINDEBUG((LOG_DEBUG, "Script %s started; pid = %d", prog, pid));
|
|
++n_children;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* reap_kids - get status from any dead child processes,
|
|
* and log a message for abnormal terminations.
|
|
*/
|
|
void reap_kids()
|
|
{
|
|
int pid, status;
|
|
|
|
if (n_children == 0)
|
|
return;
|
|
if ((pid = waitpid(-1, &status, WNOHANG)) == -1) {
|
|
if (errno != ECHILD)
|
|
syslog(LOG_ERR, "Error waiting for child process: %m");
|
|
return;
|
|
}
|
|
if (pid > 0) {
|
|
--n_children;
|
|
if (WIFSIGNALED(status)) {
|
|
syslog(LOG_WARNING, "Child process %d terminated with signal %d",
|
|
pid, WTERMSIG(status));
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* log_packet - format a packet and log it.
|
|
*/
|
|
|
|
static char line[256]; /* line to be logged accumulated here */
|
|
static char *linep;
|
|
|
|
void log_packet(u_char *p,int len,char *prefix,int linkunit)
|
|
{
|
|
static void pr_log __P((void *, char *, ...));
|
|
|
|
int i, n;
|
|
u_short proto;
|
|
u_char x;
|
|
struct protent *protp;
|
|
|
|
strcpy(line, prefix);
|
|
linep = line + strlen(line);
|
|
|
|
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;
|
|
}
|
|
|
|
pr_log(NULL,"[%d]",linkunit);
|
|
if (protp) {
|
|
pr_log(NULL, "[%s", protp->name);
|
|
n = (*protp->printpkt)(p, len, pr_log, NULL);
|
|
pr_log(NULL, "]");
|
|
p += n;
|
|
len -= n;
|
|
} else {
|
|
pr_log(NULL, "[proto=0x%x]", proto);
|
|
}
|
|
}
|
|
|
|
for (; len > 0; --len) {
|
|
GETCHAR(x, p);
|
|
pr_log(NULL, " %.2x", x);
|
|
}
|
|
|
|
if (linep != line)
|
|
syslog(LOG_DEBUG, "%s", line);
|
|
}
|
|
|
|
|
|
#ifdef __STDC__
|
|
#include <stdarg.h>
|
|
|
|
static void pr_log(void *arg, char *fmt, ...)
|
|
{
|
|
int n;
|
|
va_list pvar;
|
|
char buf[256];
|
|
|
|
va_start(pvar, fmt);
|
|
vsprintf(buf, fmt, pvar);
|
|
va_end(pvar);
|
|
|
|
n = strlen(buf);
|
|
if (linep + n + 1 > line + sizeof(line)) {
|
|
syslog(LOG_DEBUG, "%s", line);
|
|
linep = line;
|
|
}
|
|
strcpy(linep, buf);
|
|
linep += n;
|
|
}
|
|
|
|
#else /* __STDC__ */
|
|
#include <varargs.h>
|
|
|
|
static void pr_log(arg, fmt, va_alist)
|
|
void *arg;
|
|
char *fmt;
|
|
va_dcl
|
|
{
|
|
int n;
|
|
va_list pvar;
|
|
char buf[256];
|
|
|
|
va_start(pvar);
|
|
vsprintf(buf, fmt, pvar);
|
|
va_end(pvar);
|
|
|
|
n = strlen(buf);
|
|
if (linep + n + 1 > line + sizeof(line)) {
|
|
syslog(LOG_DEBUG, "%s", line);
|
|
linep = line;
|
|
}
|
|
strcpy(linep, buf);
|
|
linep += n;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* print_string - print a readable representation of a string using
|
|
* printer.
|
|
*/
|
|
void print_string(char *p,int len,void (*printer) __P((void *, char *, ...)),void *arg)
|
|
{
|
|
int c;
|
|
|
|
printer(arg, "\"");
|
|
for (; len > 0; --len) {
|
|
c = *p++;
|
|
if (' ' <= c && c <= '~')
|
|
printer(arg, "%c", c);
|
|
else
|
|
printer(arg, "\\%.3o", c);
|
|
}
|
|
printer(arg, "\"");
|
|
}
|
|
|
|
/*
|
|
* novm - log an error message saying we ran out of memory, and die.
|
|
*/
|
|
void novm(char *msg)
|
|
{
|
|
syslog(LOG_ERR, "Virtual memory exhausted allocating %s\n", msg);
|
|
die(1);
|
|
}
|
|
|
|
/*
|
|
* fmtmsg - 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) and %I (IP address) formats.
|
|
* Doesn't do floating-point formats.
|
|
* Returns the number of chars put into buf.
|
|
*/
|
|
int fmtmsg(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 = vfmtmsg(buf, buflen, fmt, args);
|
|
va_end(args);
|
|
return n;
|
|
}
|
|
|
|
/*
|
|
* vfmtmsg - like fmtmsg, takes a va_list instead of a list of args.
|
|
*/
|
|
#define OUTCHAR(c) (buflen > 0? (--buflen, *buf++ = (c)): 0)
|
|
|
|
int vfmtmsg(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;
|
|
void *a;
|
|
char num[32];
|
|
time_t t;
|
|
static char hexchars[] = "0123456789abcdef";
|
|
|
|
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':
|
|
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':
|
|
str = ip_ntoa(va_arg(args, u_int32_t));
|
|
break;
|
|
case 'r':
|
|
f = va_arg(args, char *);
|
|
/*
|
|
* XXX We assume a va_list is either a pointer or an array, so
|
|
* what gets passed for a va_list is like a void * in some sense.
|
|
*/
|
|
a = va_arg(args, void *);
|
|
#ifdef __alpha__ /* always do this? */
|
|
n = fmtmsg(buf, buflen + 1, f, a);
|
|
#else
|
|
n = vfmtmsg(buf, buflen + 1, f, a);
|
|
#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;
|
|
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;
|
|
}
|
|
|
|
void reload_config(void)
|
|
{
|
|
auth_reload_upap_pw();
|
|
}
|
|
|