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sighandler.c
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sighandler.c
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/**
* ratched - TLS connection router that performs a man-in-the-middle attack
* Copyright (C) 2017-2017 Johannes Bauer
*
* This file is part of ratched.
*
* ratched is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; this program is ONLY licensed under
* version 3 of the License, later versions are explicitly excluded.
*
* ratched is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with ratched; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Johannes Bauer <JohannesBauer@gmx.de>
**/
#include <stdio.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
#include "sighandler.h"
#include "logging.h"
#include "server.h"
static bool shutdown_requested;
static void sigint_handler(int signal) {
stop_forwarding(shutdown_requested);
shutdown_requested = true;
}
bool init_signal_handlers(void) {
{
struct sigaction action = {
.sa_handler = sigint_handler,
.sa_flags = SA_RESTART,
};
sigemptyset(&action.sa_mask);
if (sigaction(SIGINT, &action, NULL) != 0) {
logmsg(LLVL_ERROR, "sigaction failed to install SIGINT handler: %s", strerror(errno));
return false;
}
if (sigaction(SIGHUP, &action, NULL) != 0) {
logmsg(LLVL_ERROR, "sigaction failed to install SIGHUP handler: %s", strerror(errno));
return false;
}
if (sigaction(SIGTERM, &action, NULL) != 0) {
logmsg(LLVL_ERROR, "sigaction failed to install SIGTERM handler: %s", strerror(errno));
return false;
}
}
{
struct sigaction action = {
.sa_handler = SIG_IGN,
.sa_flags = SA_RESTART,
};
if (sigaction(SIGPIPE, &action, NULL) != 0) {
logmsg(LLVL_ERROR, "sigaction failed to install SIGPIPE handler: %s", strerror(errno));
return false;
}
}
return true;
}