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/*
* Copyright (c) 2005-2010 Thierry FOURNIER
* $Id: arpalert.c 421 2006-11-04 10:56:25Z thierry $
*
*/
#include "config.h"
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "log.h"
#include "data.h"
#include "maclist.h"
#include "alerte.h"
#include "sens.h"
#include "loadmodule.h"
#include "macname.h"
extern int errno;
void die(int);
void dumpmaclist(int);
// set flag signals
int sigchld = 0;
int sighup = 0;
int sigstop = 0;
void setsigchld(int signal){
sigchld++;
#ifdef DEBUG
logmsg(LOG_DEBUG, "[%s %d %s] SIGCHLD",
__FILE__, __LINE__, __FUNCTION__);
#endif
}
void setsighup(int signal){
sighup++;
#ifdef DEBUG
logmsg(LOG_DEBUG, "[%s %d %s] SIGHUP",
__FILE__, __LINE__, __FUNCTION__);
#endif
}
void setsigstop(int signal){
sigstop++;
#ifdef DEBUG
logmsg(LOG_DEBUG, "[%s %d %s] SIGSTOP",
__FILE__, __LINE__, __FUNCTION__);
#endif
}
// setup signals
void (*setsignal (int signal, void (*function)(int)))(int) {
struct sigaction old, new;
memset(&new, 0, sizeof(struct sigaction));
new.sa_handler = function;
new.sa_flags = SA_RESTART;
sigemptyset(&(new.sa_mask));
if (sigaction(signal, &new, &old)){
logmsg(LOG_ERR, "[%s %i] sigaction[%d]: %s",
__FILE__, __LINE__, errno, strerror(errno));
exit(1);
}
return(old.sa_handler);
}
// init signals
void signals_init(void){
(void)setsignal(SIGINT, setsigstop);
(void)setsignal(SIGTERM, setsigstop);
(void)setsignal(SIGQUIT, setsigstop);
(void)setsignal(SIGABRT, setsigstop);
(void)setsignal(SIGCHLD, setsigchld);
(void)setsignal(SIGHUP, setsighup);
}
// signals computing
void signals_func(void){
// SIGCHLD
if(sigchld > 0){
sigchld--;
alerte_kill_pid();
}
// SIGHUP
if(sighup > 0){
sighup--;
maclist_reload();
sens_reload();
macname_reload();
logfile_reload();
}
// SIGQUIT
if(sigstop > 0){
sigstop--;
#ifdef DEBUG
logmsg(LOG_DEBUG, "[%s %i %s] quit arpalert",
__FILE__, __LINE__, __FUNCTION__);
#endif
data_dump();
module_unload();
exit(0);
}
}
// get next signal
void *signals_next(struct timeval *tv){
if(sigchld > 0 ||
sighup > 0 ||
sigstop > 0){
tv->tv_sec = 0;
tv->tv_usec = 0;
return signals_func;
}
tv->tv_sec = -1;
return NULL;
}
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