175 lines
3.5 KiB
C
175 lines
3.5 KiB
C
/* strongSwan charon launcher
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* Copyright (C) 2001-2002 Mathieu Lafon - Arkoon Network Security
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* Copyright (C) 2006 Martin Willi - Hochschule fuer Technik Rapperswil
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*
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* Ported from invokepluto.c to fit charons needs.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* RCSID $Id: invokecharon.c $
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <signal.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <freeswan.h>
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#include "../pluto/constants.h"
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#include "../pluto/defs.h"
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#include "../pluto/log.h"
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#include "confread.h"
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#include "invokecharon.h"
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#include "files.h"
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static int _charon_pid = 0;
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static int _stop_requested;
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pid_t
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starter_charon_pid(void)
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{
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return _charon_pid;
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}
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void
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starter_charon_sigchild(pid_t pid)
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{
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if (pid == _charon_pid)
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{
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_charon_pid = 0;
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if (!_stop_requested)
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{
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plog("charon has died -- restart scheduled (%dsec)"
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, CHARON_RESTART_DELAY);
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alarm(CHARON_RESTART_DELAY); // restart in 5 sec
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}
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unlink(CHARON_PID_FILE);
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}
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}
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int
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starter_stop_charon (void)
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{
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pid_t pid;
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int i;
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pid = _charon_pid;
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if (pid)
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{
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_stop_requested = 1;
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/* be more and more aggressive */
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for (i = 0; i < 20 && (pid = _charon_pid) != 0; i++)
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{
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if (i == 0)
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kill(pid, SIGINT);
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else if (i < 10)
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kill(pid, SIGTERM);
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else
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kill(pid, SIGKILL);
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usleep(20000);
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}
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if (_charon_pid == 0)
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return 0;
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plog("starter_stop_charon(): can't stop charon !!!");
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return -1;
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}
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else
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{
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plog("stater_stop_charon(): charon is not started...");
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}
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return -1;
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}
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int
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starter_start_charon (starter_config_t *cfg, bool debug)
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{
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int pid, i;
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struct stat stb;
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int argc = 1;
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char *arg[] = {
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CHARON_CMD, NULL, NULL,
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};
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if (!debug)
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{
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arg[argc++] = "--use-syslog";
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}
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if (_charon_pid)
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{
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plog("starter_start_charon(): charon already started...");
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return -1;
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}
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else
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{
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unlink(CHARON_CTL_FILE);
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_stop_requested = 0;
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pid = fork();
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switch (pid)
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{
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case -1:
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plog("can't fork(): %s", strerror(errno));
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return -1;
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case 0:
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/* child */
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setsid();
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sigprocmask(SIG_SETMASK, 0, NULL);
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execv(arg[0], arg);
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plog("can't execv(%s,...): %s", arg[0], strerror(errno));
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exit(1);
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default:
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/* father */
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_charon_pid = pid;
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for (i = 0; i < 50 && _charon_pid; i++)
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{
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/* wait for charon */
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usleep(20000);
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if (stat(CHARON_PID_FILE, &stb) == 0)
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{
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DBG(DBG_CONTROL,
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DBG_log("charon (%d) started", _charon_pid)
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)
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return 0;
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}
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}
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if (_charon_pid)
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{
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/* If charon is started but with no ctl file, stop it */
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plog("charon too long to start... - kill kill");
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for (i = 0; i < 20 && (pid = _charon_pid) != 0; i++)
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{
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if (i == 0)
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kill(pid, SIGINT);
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else if (i < 10)
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kill(pid, SIGTERM);
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else
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kill(pid, SIGKILL);
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usleep(20000);
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}
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}
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else
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{
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plog("charon refused to be started");
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}
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return -1;
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}
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}
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return -1;
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}
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