281 lines
6.9 KiB
C
281 lines
6.9 KiB
C
/*
|
|
* Copyright (c) 1997, 1999 Hellmuth Michaelis. 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. 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
*---------------------------------------------------------------------------
|
|
*
|
|
* exec.h - supplemental program/script execution
|
|
* ----------------------------------------------
|
|
*
|
|
* $FreeBSD$
|
|
*
|
|
* last edit-date: [Sun Feb 14 10:10:35 1999]
|
|
*
|
|
*---------------------------------------------------------------------------*/
|
|
|
|
#include "isdnd.h"
|
|
|
|
#include <sys/wait.h>
|
|
#include <sys/socket.h>
|
|
#include <net/if.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
|
|
#define MAX_PIDS 32
|
|
|
|
static struct pid_tab {
|
|
pid_t pid;
|
|
cfg_entry_t *cep;
|
|
} pid_tab[MAX_PIDS];
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* SIGCHLD signal handler
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
sigchild_handler(int sig)
|
|
{
|
|
int retstat;
|
|
register int i;
|
|
pid_t pid;
|
|
|
|
if((pid = waitpid(-1, &retstat, WNOHANG)) <= 0)
|
|
{
|
|
log(LL_ERR, "ERROR, waitpid: %s", strerror(errno));
|
|
do_exit(1);
|
|
}
|
|
else
|
|
{
|
|
if(WIFEXITED(retstat))
|
|
{
|
|
DBGL(DL_PROC, (log(LL_DBG, "normal child (pid=%d) termination, exitstat = %d",
|
|
pid, WEXITSTATUS(retstat))));
|
|
}
|
|
else if(WIFSIGNALED(retstat))
|
|
{
|
|
if(WCOREDUMP(retstat))
|
|
log(LL_WRN, "child (pid=%d) termination due to signal %d (coredump)",
|
|
pid, WTERMSIG(retstat));
|
|
else
|
|
log(LL_WRN, "child (pid=%d) termination due to signal %d",
|
|
pid, WTERMSIG(retstat));
|
|
}
|
|
}
|
|
|
|
/* check if hangup required */
|
|
|
|
for(i=0; i < MAX_PIDS; i++)
|
|
{
|
|
if(pid_tab[i].pid == pid)
|
|
{
|
|
if(pid_tab[i].cep->cdid != CDID_UNUSED)
|
|
{
|
|
DBGL(DL_PROC, (log(LL_DBG, "sigchild_handler: scheduling hangup for cdid %d, pid %d",
|
|
pid_tab[i].cep->cdid, pid_tab[i].pid)));
|
|
pid_tab[i].cep->hangup = 1;
|
|
}
|
|
pid_tab[i].pid = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* execute prog as a subprocess and pass an argumentlist
|
|
*---------------------------------------------------------------------------*/
|
|
pid_t
|
|
exec_prog(char *prog, char **arglist)
|
|
{
|
|
char tmp[MAXPATHLEN];
|
|
char path[MAXPATHLEN+1];
|
|
pid_t pid;
|
|
int a;
|
|
|
|
sprintf(path, "%s/%s", ETCPATH, prog);
|
|
|
|
arglist[0] = path;
|
|
|
|
tmp[0] = '\0';
|
|
|
|
for(a=1; arglist[a] != NULL; ++a )
|
|
{
|
|
strcat(tmp, " " );
|
|
strcat(tmp, arglist[a]);
|
|
}
|
|
|
|
DBGL(DL_PROC, (log(LL_DBG, "exec_prog: %s, args:%s", path, tmp)));
|
|
|
|
switch(pid = fork())
|
|
{
|
|
case -1: /* error */
|
|
log(LL_ERR, "ERROR, exec_prog/fork: %s", strerror(errno));
|
|
do_exit(1);
|
|
case 0: /* child */
|
|
break;
|
|
default: /* parent */
|
|
return(pid);
|
|
}
|
|
|
|
/* this is the child now */
|
|
|
|
if(execvp(path,arglist) < 0 )
|
|
_exit(127);
|
|
|
|
return(-1);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* run interface up/down script
|
|
*---------------------------------------------------------------------------*/
|
|
int
|
|
exec_connect_prog(cfg_entry_t *cep, const char *prog, int link_down)
|
|
{
|
|
char *argv[32], **av = argv;
|
|
char devicename[MAXPATHLEN], addr[100];
|
|
char *device;
|
|
int s;
|
|
struct ifreq ifr;
|
|
|
|
/* the obvious things */
|
|
device = bdrivername(cep->usrdevicename);
|
|
sprintf(devicename, "%s%d", device, cep->usrdeviceunit);
|
|
*av++ = (char*)prog;
|
|
*av++ = "-d";
|
|
*av++ = devicename;
|
|
*av++ = "-f";
|
|
*av++ = link_down ? "down" : "up";
|
|
|
|
/* try to figure AF_INET address of interface */
|
|
addr[0] = '\0';
|
|
memset(&ifr, 0, sizeof ifr);
|
|
ifr.ifr_addr.sa_family = AF_INET;
|
|
strncpy(ifr.ifr_name, devicename, sizeof(ifr.ifr_name));
|
|
s = socket(AF_INET, SOCK_DGRAM, 0);
|
|
if (s >= 0) {
|
|
if (ioctl(s, SIOCGIFADDR, (caddr_t)&ifr) >= 0) {
|
|
struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr;
|
|
strcpy(addr, inet_ntoa(sin->sin_addr));
|
|
*av++ = "-a";
|
|
*av++ = addr;
|
|
}
|
|
close(s);
|
|
}
|
|
|
|
/* terminate argv */
|
|
*av++ = NULL;
|
|
|
|
return exec_prog((char*)prog, argv);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* run answeringmachine application
|
|
*---------------------------------------------------------------------------*/
|
|
int
|
|
exec_answer(cfg_entry_t *cep)
|
|
{
|
|
char *argv[32];
|
|
u_char devicename[MAXPATHLEN];
|
|
int pid;
|
|
char *device;
|
|
|
|
device = bdrivername(cep->usrdevicename);
|
|
|
|
sprintf(devicename, "/dev/i4b%s%d", device, cep->usrdeviceunit);
|
|
|
|
argv[0] = cep->answerprog;
|
|
argv[1] = "-D";
|
|
argv[2] = devicename;
|
|
argv[3] = "-d";
|
|
argv[4] = "unknown";
|
|
argv[5] = "-s";
|
|
argv[6] = "unknown";
|
|
argv[7] = NULL;
|
|
|
|
/* if destination telephone number avail, add it as argument */
|
|
|
|
if(*cep->local_phone_incoming)
|
|
argv[4] = cep->local_phone_incoming;
|
|
|
|
/* if source telephone number avail, add it as argument */
|
|
|
|
if(*cep->real_phone_incoming)
|
|
argv[6] = cep->real_phone_incoming;
|
|
|
|
if(*cep->display)
|
|
{
|
|
argv[7] = "-t";
|
|
argv[8] = cep->display;
|
|
argv[9] = NULL;
|
|
}
|
|
|
|
/* exec program */
|
|
|
|
DBGL(DL_PROC, (log(LL_DBG, "exec_answer: prog=[%s]", cep->answerprog)));
|
|
|
|
pid = exec_prog(cep->answerprog, argv);
|
|
|
|
/* enter pid and conf ptr entry addr into table */
|
|
|
|
if(pid != -1)
|
|
{
|
|
int i;
|
|
|
|
for(i=0; i < MAX_PIDS; i++)
|
|
{
|
|
if(pid_tab[i].pid == 0)
|
|
{
|
|
pid_tab[i].pid = pid;
|
|
pid_tab[i].cep = cep;
|
|
break;
|
|
}
|
|
}
|
|
return(GOOD);
|
|
}
|
|
return(ERROR);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* check if a connection has an outstanding process, if yes, kill it
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
check_and_kill(cfg_entry_t *cep)
|
|
{
|
|
int i;
|
|
|
|
for(i=0; i < MAX_PIDS; i++)
|
|
{
|
|
if(pid_tab[i].cep == cep)
|
|
{
|
|
pid_t kp;
|
|
|
|
DBGL(DL_PROC, (log(LL_DBG, "check_and_kill: killing pid %d", pid_tab[i].pid)));
|
|
|
|
kp = pid_tab[i].pid;
|
|
pid_tab[i].pid = 0;
|
|
kill(kp, SIGHUP);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* EOF */
|