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/* redsocks - transparent TCP-to-proxy redirector
* Copyright (C) 2007-2011 Leonid Evdokimov <leon@darkk.net.ru>
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
#include <sys/time.h>
#include <sys/types.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <assert.h>
#include <event.h>
#include "log.h"
#include "main.h"
#include "utils.h"
#include "version.h"
#include "config.h"
#include "base.h"
extern app_subsys redsocks_subsys;
extern app_subsys debug_subsys;
extern app_subsys base_subsys;
extern app_subsys redudp_subsys;
extern app_subsys dnstc_subsys;
app_subsys *subsystems[] = {
&redsocks_subsys,
#ifdef DBG_BUILD
&debug_subsys,
#endif
&base_subsys,
&redudp_subsys,
&dnstc_subsys,
};
static const char *confname = "/etc/redsocks.conf";
static const char *pidfile = NULL;
static void terminate(int sig, short what, void *_arg)
{
if (event_loopbreak() != 0)
log_error(LOG_WARNING, "event_loopbreak");
}
int main(int argc, char **argv)
{
int error;
app_subsys **ss;
int exit_signals[2] = {SIGTERM, SIGINT};
struct event terminators[2];
bool conftest = false;
int opt;
int i;
evutil_secure_rng_init();
while ((opt = getopt(argc, argv, "h?vtc:p:")) != -1) {
switch (opt) {
case 't':
conftest = true;
break;
case 'c':
confname = optarg;
break;
case 'p':
pidfile = optarg;
break;
case 'v':
puts(redsocks_version);
printf("Built with libevent-%s\n", LIBEVENT_VERSION);
printf("Runs with libevent-%s\n", event_get_version());
if (LIBEVENT_VERSION_NUMBER != event_get_version_number()) {
printf("Warning: libevent version number mismatch.\n"
" Headers: %8x\n"
" Runtime: %8x\n", LIBEVENT_VERSION_NUMBER, event_get_version_number());
}
return EXIT_SUCCESS;
default:
printf(
"Usage: %s [-?hvt] [-c config] [-p pidfile]\n"
" -h, -? this message\n"
" -v print version\n"
" -t test config syntax\n"
" -p write pid to pidfile\n",
argv[0]);
return (opt == '?' || opt == 'h') ? EXIT_SUCCESS : EXIT_FAILURE;
}
}
if (event_get_struct_event_size() != sizeof(struct event)) {
puts("libevent event_get_struct_event_size() != sizeof(struct event)! Check `redsocks -v` and recompile redsocks");
return EXIT_FAILURE;
}
FILE *f = fopen(confname, "r");
if (!f) {
perror("Unable to open config file");
return EXIT_FAILURE;
}
parser_context* parser = parser_start(f);
if (!parser) {
perror("Not enough memory for parser");
return EXIT_FAILURE;
}
FOREACH(ss, subsystems)
if ((*ss)->conf_section)
parser_add_section(parser, (*ss)->conf_section);
error = parser_run(parser);
parser_stop(parser);
fclose(f);
if (error)
return EXIT_FAILURE;
if (conftest)
return EXIT_SUCCESS;
struct event_base* evbase = event_init();
memset(terminators, 0, sizeof(terminators));
FOREACH(ss, subsystems) {
if ((*ss)->init) {
error = (*ss)->init(evbase);
if (error)
goto shutdown;
}
}
if (pidfile) {
f = fopen(pidfile, "w");
if (!f) {
perror("Unable to open pidfile for write");
return EXIT_FAILURE;
}
fprintf(f, "%d\n", getpid());
fclose(f);
}
assert(SIZEOF_ARRAY(exit_signals) == SIZEOF_ARRAY(terminators));
for (i = 0; i < SIZEOF_ARRAY(exit_signals); i++) {
signal_set(&terminators[i], exit_signals[i], terminate, NULL);
if (signal_add(&terminators[i], NULL) != 0) {
log_errno(LOG_ERR, "signal_add");
goto shutdown;
}
}
if (LIBEVENT_VERSION_NUMBER != event_get_version_number()) {
log_error(LOG_WARNING, "libevent version mismatch! headers %8x, runtime %8x\n", LIBEVENT_VERSION_NUMBER, event_get_version_number());
}
log_error(LOG_NOTICE, "redsocks started, conn_max=%u", redsocks_conn_max());
event_dispatch();
log_error(LOG_NOTICE, "redsocks goes down");
shutdown:
for (i = 0; i < SIZEOF_ARRAY(exit_signals); i++) {
if (signal_initialized(&terminators[i])) {
if (signal_del(&terminators[i]) != 0)
log_errno(LOG_WARNING, "signal_del");
memset(&terminators[i], 0, sizeof(terminators[i]));
}
}
for (--ss; ss >= subsystems; ss--)
if ((*ss)->fini)
(*ss)->fini();
event_base_free(evbase);
return !error ? EXIT_SUCCESS : EXIT_FAILURE;
}
/* vim:set tabstop=4 softtabstop=4 shiftwidth=4: */
/* vim:set foldmethod=marker foldlevel=32 foldmarker={,}: */
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