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/*
* Copyright (C) 2013 Martin Willi
* Copyright (C) 2013 revosec AG
*
* This program 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; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program 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.
*/
#include <sys/types.h>
#include <sys/utsname.h>
#include <unistd.h>
#include <stdio.h>
#include <signal.h>
#include <pthread.h>
#include <library.h>
#include <hydra.h>
#include <daemon.h>
#include <threading/thread.h>
#include <utils/backtrace.h>
#include "xpc_dispatch.h"
/**
* XPC dispatcher class
*/
static xpc_dispatch_t *dispatcher;
/**
* atexit() cleanup for dispatcher
*/
void dispatcher_cleanup()
{
DESTROY_IF(dispatcher);
}
/**
* Loglevel configuration
*/
static level_t levels[DBG_MAX];
/**
* hook in library for debugging messages
*/
extern void (*dbg) (debug_t group, level_t level, char *fmt, ...);
/**
* Logging hook for library logs, using stderr output
*/
static void dbg_stderr(debug_t group, level_t level, char *fmt, ...)
{
va_list args;
if (level <= 1)
{
va_start(args, fmt);
fprintf(stderr, "00[%N] ", debug_names, group);
vfprintf(stderr, fmt, args);
fprintf(stderr, "\n");
va_end(args);
}
}
/**
* Run the daemon and handle unix signals
*/
static int run()
{
sigset_t set;
sigemptyset(&set);
sigaddset(&set, SIGINT);
sigaddset(&set, SIGTERM);
sigprocmask(SIG_BLOCK, &set, NULL);
while (TRUE)
{
int sig;
if (sigwait(&set, &sig))
{
DBG1(DBG_DMN, "error while waiting for a signal");
return 1;
}
switch (sig)
{
case SIGINT:
DBG1(DBG_DMN, "signal of type SIGINT received. Shutting down");
charon->bus->alert(charon->bus, ALERT_SHUTDOWN_SIGNAL, sig);
return 0;
case SIGTERM:
DBG1(DBG_DMN, "signal of type SIGTERM received. Shutting down");
charon->bus->alert(charon->bus, ALERT_SHUTDOWN_SIGNAL, sig);
return 0;
default:
DBG1(DBG_DMN, "unknown signal %d received. Ignored", sig);
break;
}
}
}
/**
* Handle SIGSEGV/SIGILL signals raised by threads
*/
static void segv_handler(int signal)
{
backtrace_t *backtrace;
DBG1(DBG_DMN, "thread %u received %d", thread_current_id(), signal);
backtrace = backtrace_create(2);
backtrace->log(backtrace, NULL, TRUE);
backtrace->destroy(backtrace);
DBG1(DBG_DMN, "killing ourself, received critical signal");
abort();
}
/**
* Main function, starts the daemon.
*/
int main(int argc, char *argv[])
{
struct sigaction action;
struct utsname utsname;
int group;
dbg = dbg_stderr;
atexit(library_deinit);
if (!library_init(NULL))
{
exit(SS_RC_LIBSTRONGSWAN_INTEGRITY);
}
if (lib->integrity)
{
if (!lib->integrity->check_file(lib->integrity, "charon-xpc", argv[0]))
{
exit(SS_RC_DAEMON_INTEGRITY);
}
}
atexit(libhydra_deinit);
if (!libhydra_init("charon-xpc"))
{
exit(SS_RC_INITIALIZATION_FAILED);
}
atexit(libcharon_deinit);
if (!libcharon_init("charon-xpc"))
{
exit(SS_RC_INITIALIZATION_FAILED);
}
for (group = 0; group < DBG_MAX; group++)
{
levels[group] = LEVEL_CTRL;
}
charon->load_loggers(charon, levels, TRUE);
lib->settings->set_default_str(lib->settings, "charon-cmd.port", "0");
lib->settings->set_default_str(lib->settings, "charon-cmd.port_nat_t", "0");
if (!charon->initialize(charon,
lib->settings->get_str(lib->settings, "charon-xpc.load",
"random nonce pem pkcs1 openssl kernel-pfkey kernel-pfroute "
"socket-default eap-identity eap-mschapv2")))
{
exit(SS_RC_INITIALIZATION_FAILED);
}
if (uname(&utsname) != 0)
{
memset(&utsname, 0, sizeof(utsname));
}
DBG1(DBG_DMN, "Starting charon-xpc IKE daemon (strongSwan %s, %s %s, %s)",
VERSION, utsname.sysname, utsname.release, utsname.machine);
/* add handler for SEGV and ILL,
* INT, TERM and HUP are handled by sigwait() in run() */
action.sa_handler = segv_handler;
action.sa_flags = 0;
sigemptyset(&action.sa_mask);
sigaddset(&action.sa_mask, SIGINT);
sigaddset(&action.sa_mask, SIGTERM);
sigaddset(&action.sa_mask, SIGHUP);
sigaction(SIGSEGV, &action, NULL);
sigaction(SIGILL, &action, NULL);
sigaction(SIGBUS, &action, NULL);
action.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &action, NULL);
pthread_sigmask(SIG_SETMASK, &action.sa_mask, NULL);
dispatcher = xpc_dispatch_create();
if (!dispatcher)
{
exit(SS_RC_INITIALIZATION_FAILED);
}
atexit(dispatcher_cleanup);
charon->start(charon);
return run();
}
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