266 lines
6.3 KiB
C
266 lines
6.3 KiB
C
/*
|
|
* Copyright (C) 2012 Tobias Brunner
|
|
* Hochschule fuer Technik Rapperswil
|
|
*
|
|
* 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 <stdio.h>
|
|
#include <syslog.h>
|
|
#include <signal.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
|
|
#include <hydra.h>
|
|
#include <daemon.h>
|
|
|
|
#include <library.h>
|
|
#include <utils/backtrace.h>
|
|
#include <threading/thread.h>
|
|
|
|
#include <nm/nm_backend.h>
|
|
|
|
/**
|
|
* Default user and group
|
|
*/
|
|
#ifndef IPSEC_USER
|
|
#define IPSEC_USER NULL
|
|
#endif
|
|
|
|
#ifndef IPSEC_GROUP
|
|
#define IPSEC_GROUP NULL
|
|
#endif
|
|
|
|
/**
|
|
* Hook in library for debugging messages
|
|
*/
|
|
extern void (*dbg) (debug_t group, level_t level, char *fmt, ...);
|
|
|
|
/**
|
|
* Simple logging hook for library logs, using syslog output
|
|
*/
|
|
static void dbg_syslog(debug_t group, level_t level, char *fmt, ...)
|
|
{
|
|
if (level <= 1)
|
|
{
|
|
char buffer[8192], groupstr[4];
|
|
va_list args;
|
|
|
|
va_start(args, fmt);
|
|
/* write in memory buffer first */
|
|
vsnprintf(buffer, sizeof(buffer), fmt, args);
|
|
/* cache group name */
|
|
snprintf(groupstr, sizeof(groupstr), "%N", debug_names, group);
|
|
syslog(LOG_DAEMON|LOG_INFO, "00[%s] %s", groupstr, buffer);
|
|
va_end(args);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Run the daemon and handle unix signals
|
|
*/
|
|
static void run()
|
|
{
|
|
sigset_t set;
|
|
|
|
/* handle SIGINT and SIGTERM in this handler */
|
|
sigemptyset(&set);
|
|
sigaddset(&set, SIGINT);
|
|
sigaddset(&set, SIGTERM);
|
|
sigprocmask(SIG_BLOCK, &set, NULL);
|
|
|
|
while (TRUE)
|
|
{
|
|
int sig;
|
|
int error;
|
|
|
|
error = sigwait(&set, &sig);
|
|
if (error)
|
|
{
|
|
DBG1(DBG_DMN, "error %d while waiting for a signal", error);
|
|
return;
|
|
}
|
|
switch (sig)
|
|
{
|
|
case SIGINT:
|
|
{
|
|
DBG1(DBG_DMN, "signal of type SIGINT received. Shutting down");
|
|
charon->bus->alert(charon->bus, ALERT_SHUTDOWN_SIGNAL, sig);
|
|
return;
|
|
}
|
|
case SIGTERM:
|
|
{
|
|
DBG1(DBG_DMN, "signal of type SIGTERM received. Shutting down");
|
|
charon->bus->alert(charon->bus, ALERT_SHUTDOWN_SIGNAL, sig);
|
|
return;
|
|
}
|
|
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, stderr, TRUE);
|
|
backtrace->destroy(backtrace);
|
|
|
|
DBG1(DBG_DMN, "killing ourself, received critical signal");
|
|
abort();
|
|
}
|
|
|
|
/**
|
|
* Lookup UID and GID
|
|
*/
|
|
static bool lookup_uid_gid()
|
|
{
|
|
char *name;
|
|
|
|
name = lib->settings->get_str(lib->settings, "charon-nm.user",
|
|
IPSEC_USER);
|
|
if (name && !lib->caps->resolve_uid(lib->caps, name))
|
|
{
|
|
return FALSE;
|
|
}
|
|
name = lib->settings->get_str(lib->settings, "charon-nm.group",
|
|
IPSEC_GROUP);
|
|
if (name && !lib->caps->resolve_gid(lib->caps, name))
|
|
{
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Main function, starts NetworkManager backend.
|
|
*/
|
|
int main(int argc, char *argv[])
|
|
{
|
|
struct sigaction action;
|
|
int status = SS_RC_INITIALIZATION_FAILED;
|
|
|
|
/* logging for library during initialization, as we have no bus yet */
|
|
dbg = dbg_syslog;
|
|
|
|
/* initialize library */
|
|
if (!library_init(NULL))
|
|
{
|
|
library_deinit();
|
|
exit(SS_RC_LIBSTRONGSWAN_INTEGRITY);
|
|
}
|
|
|
|
if (lib->integrity &&
|
|
!lib->integrity->check_file(lib->integrity, "charon-nm", argv[0]))
|
|
{
|
|
dbg_syslog(DBG_DMN, 1, "integrity check of charon-nm failed");
|
|
library_deinit();
|
|
exit(SS_RC_DAEMON_INTEGRITY);
|
|
}
|
|
|
|
if (!libhydra_init("charon-nm"))
|
|
{
|
|
dbg_syslog(DBG_DMN, 1, "initialization failed - aborting charon-nm");
|
|
libhydra_deinit();
|
|
library_deinit();
|
|
exit(SS_RC_INITIALIZATION_FAILED);
|
|
}
|
|
|
|
if (!libcharon_init("charon-nm"))
|
|
{
|
|
dbg_syslog(DBG_DMN, 1, "initialization failed - aborting charon-nm");
|
|
goto deinit;
|
|
}
|
|
|
|
if (!lookup_uid_gid())
|
|
{
|
|
dbg_syslog(DBG_DMN, 1, "invalid uid/gid - aborting charon-nm");
|
|
goto deinit;
|
|
}
|
|
|
|
/* make sure we log to the DAEMON facility by default */
|
|
lib->settings->set_int(lib->settings, "charon-nm.syslog.daemon.default",
|
|
lib->settings->get_int(lib->settings,
|
|
"charon-nm.syslog.daemon.default", 1));
|
|
charon->load_loggers(charon, NULL, FALSE);
|
|
|
|
/* use random ports to avoid conflicts with regular charon */
|
|
lib->settings->set_int(lib->settings, "charon-nm.port", 0);
|
|
lib->settings->set_int(lib->settings, "charon-nm.port_natt_t", 0);
|
|
|
|
DBG1(DBG_DMN, "Starting charon NetworkManager backend (strongSwan "VERSION")");
|
|
if (lib->integrity)
|
|
{
|
|
DBG1(DBG_DMN, "integrity tests enabled:");
|
|
DBG1(DBG_DMN, "lib 'libstrongswan': passed file and segment integrity tests");
|
|
DBG1(DBG_DMN, "lib 'libhydra': passed file and segment integrity tests");
|
|
DBG1(DBG_DMN, "lib 'libcharon': passed file and segment integrity tests");
|
|
DBG1(DBG_DMN, "daemon 'charon-nm': passed file integrity test");
|
|
}
|
|
|
|
/* register NM backend to be loaded with plugins */
|
|
nm_backend_register();
|
|
|
|
/* initialize daemon */
|
|
if (!charon->initialize(charon,
|
|
lib->settings->get_str(lib->settings, "charon-nm.load", PLUGINS)))
|
|
{
|
|
DBG1(DBG_DMN, "initialization failed - aborting charon-nm");
|
|
goto deinit;
|
|
}
|
|
lib->plugins->status(lib->plugins, LEVEL_CTRL);
|
|
|
|
if (!lib->caps->drop(lib->caps))
|
|
{
|
|
DBG1(DBG_DMN, "capability dropping failed - aborting charon-nm");
|
|
goto deinit;
|
|
}
|
|
|
|
/* add handler for SEGV and ILL,
|
|
* INT and TERM 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);
|
|
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);
|
|
|
|
/* start daemon (i.e. the threads in the thread-pool) */
|
|
charon->start(charon);
|
|
|
|
/* main thread goes to run loop */
|
|
run();
|
|
|
|
status = 0;
|
|
|
|
deinit:
|
|
libcharon_deinit();
|
|
libhydra_deinit();
|
|
library_deinit();
|
|
return status;
|
|
}
|
|
|