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#define _GNU_SOURCE
#include <signal.h>
#include <grp.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <daemon-log.h>
#include <daemon-signal.h>
#include <daemon-fork.h>
#include <daemon-pid.h>
#include <config.h>
#include "common.h"
#include "main.h"
#include "ipqapi.h"
#include "client.h"
#include "icmp.h"
#include "packet.h"
gboolean opt_fork = TRUE;
gboolean opt_syslog = TRUE;
fd_set listen_wfds, listen_rfds, select_wfds, select_rfds;
gboolean fail = FALSE;
guint32 default_verdict = 15; // ICMP packet filtered
//guint32 default_verdict = 1; // Accept
gboolean log_packets = FALSE;
static gboolean _verdict_func(ipq_packet_msg_t*m) {
if (log_packets)
daemon_log(LOG_DEBUG, "[%lu] Still unanswered, verdicting", m->packet_id);
ipqapi_verdict(m, default_verdict);
return FALSE;
}
int init() {
if (daemon_signal_init(SIGPIPE, SIGUSR1, SIGUSR2, SIGHUP, SIGINT, SIGQUIT, SIGTERM, -1) < 0)
return -1;
FD_ZERO(&listen_wfds);
FD_ZERO(&listen_rfds);
if (ipqapi_init() < 0)
return -1;
if (client_init() < 0 )
return -1;
if (icmp_init() < 0)
return -1;
return 0;
}
void done() {
ipqapi_done();
client_done();
icmp_done();
packets_free();
daemon_signal_done();
}
int loop() {
int r;
daemon_log(LOG_INFO, "%s "VERSION" sucessfully initialized.", daemon_log_ident);
while (!fail) {
int sig;
select_rfds = listen_rfds;
select_wfds = listen_wfds;
if (select(FD_SETSIZE, &select_rfds, &select_wfds, NULL, NULL) < 0 && errno != EINTR) {
daemon_log(LOG_ERR, "select: %s", strerror(errno));
goto finish;
}
if ((sig = daemon_signal_next()) >= 0) {
switch (sig) {
case SIGINT:
case SIGQUIT:
case SIGTERM:
daemon_log(LOG_INFO, "Recieved signal <%s>, exiting cleanly", strsignal(sig));
r = 0;
goto finish;
case SIGHUP:
daemon_log(LOG_INFO, "Recieved signal <%s>, reporting status info:", strsignal(sig));
daemon_log(LOG_INFO, "%u packets total, %u packets in queue", get_total_packets(), get_queued_packets());
break;
case SIGUSR1:
case SIGUSR2:
log_packets = sig == SIGUSR1;
daemon_log(LOG_INFO, "Recieved signal <%s>, %s packet logging", strsignal(sig), log_packets ? "enabling" : "disabling");
break;
case SIGPIPE:
break;
default:
daemon_log(LOG_WARNING, "Recieved signal <%s>, ignoring.", strsignal(sig));
}
} else {
if (client_work() < 0)
goto finish;
if (ipqapi_work() < 0)
goto finish;
}
packet_foreach(client_is_connected(), _verdict_func);
}
r = 0;
finish:
daemon_log(LOG_INFO, "%s exiting.", daemon_log_ident);
return r;
}
int start() {
struct group *gr;
setuid(geteuid());
if (!(gr = getgrnam("fieryfilter"))) {
daemon_log(LOG_ERR, "Could not find group fieryfilter");
return 1;
}
if (setgid(gr->gr_gid) != 0) {
daemon_log(LOG_ERR, "setgid(): %s", strerror(errno));
return 1;
}
if (opt_fork) {
pid_t pid;
daemon_retval_init();
if ((pid = daemon_fork()) < 0)
return 1;
else if (pid != 0) {
int r = daemon_retval_wait(10);
return r < 0 ? 1 : r;
} else {
daemon_log_use_syslog = opt_syslog;
if (init() < 0) {
daemon_retval_send(1);
done();
return 1;
}
daemon_retval_send(0);
}
} else {
daemon_log_use_syslog = opt_syslog;
if (init() < 0) {
done();
return 1;
}
}
if (loop() < 0) {
done();
return 1;
}
done();
return 0;
}
int main(int argc, char *argv[]) {
if ((daemon_log_ident = strrchr(argv[0], '/')))
daemon_log_ident++;
else
daemon_log_ident = argv[0];
daemon_log_use_syslog = FALSE;
return start();
}
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