[svn-upgrade] Integrating new upstream version, strongswan (4.1.1)

1 files changed, 529 insertions, 0 deletions

diff --git a/src/charon/daemon.c b/src/charon/daemon.c
new file mode 100644
index 000000000..7671aea86
--- /dev/null
+++ b/src/charon/daemon.c
@@ -0,0 +1,529 @@
+/**
+ * @file daemon.c
+ * 
+ * @brief Implementation of daemon_t and main of IKEv2-Daemon.
+ * 
+ */
+
+/*
+ * Copyright (C) 2006 Tobias Brunner, Daniel Roethlisberger
+ * Copyright (C) 2005-2006 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * 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 <signal.h>
+#include <pthread.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <time.h>
+#include <string.h>
+#include <getopt.h>
+#include <errno.h>
+#ifdef HAVE_BACKTRACE
+# include <execinfo.h>
+#endif /* HAVE_BACKTRACE */
+
+#include "daemon.h"
+
+#include <library.h>
+#include <crypto/ca.h>
+#include <utils/fetcher.h>
+#include <config/credentials/local_credential_store.h>
+#include <config/connections/local_connection_store.h>
+#include <config/policies/local_policy_store.h>
+#include <sa/authenticators/eap/eap_method.h>
+
+
+typedef struct private_daemon_t private_daemon_t;
+
+/**
+ * Private additions to daemon_t, contains threads and internal functions.
+ */
+struct private_daemon_t {
+	/**
+	 * Public members of daemon_t.
+	 */
+	daemon_t public;
+	
+	/**
+	 * Signal set used for signal handling.
+	 */
+	sigset_t signal_set;
+	
+	/** 
+	 * The thread_id of main-thread.
+	 */
+	pthread_t main_thread_id;
+};
+
+/**
+ * One and only instance of the daemon.
+ */
+daemon_t *charon;
+
+/**
+ * hook in library for debugging messages
+ */
+extern void (*dbg) (int level, char *fmt, ...);
+
+/**
+ * Logging hook for library logs, spreads debug message over bus
+ */
+static void dbg_bus(int level, char *fmt, ...)
+{
+	va_list args;
+	
+	va_start(args, fmt);
+	charon->bus->vsignal(charon->bus, DBG_LIB, level, fmt, args);
+	va_end(args);
+}
+
+/**
+ * Logging hook for library logs, using stderr output
+ */
+static void dbg_stderr(int level, char *fmt, ...)
+{
+	va_list args;
+	
+	va_start(args, fmt);
+	fprintf(stderr, "00[LIB] ");
+	vfprintf(stderr, fmt, args);
+	fprintf(stderr, "\n");
+	va_end(args);
+}
+
+/**
+ * Run the daemon and handle unix signals
+ */
+static void run(private_daemon_t *this)
+{
+	/* reselect signals for this thread */
+	sigemptyset(&(this->signal_set));
+	sigaddset(&(this->signal_set), SIGINT); 
+	sigaddset(&(this->signal_set), SIGHUP); 
+	sigaddset(&(this->signal_set), SIGTERM); 
+	pthread_sigmask(SIG_BLOCK, &(this->signal_set), 0);
+	
+	while(TRUE)
+	{
+		int signal_number;
+		int error;
+		
+		error = sigwait(&(this->signal_set), &signal_number);
+		if(error)
+		{
+			DBG1(DBG_DMN, "error %d while waiting for a signal", error);
+			return;
+		}
+		switch (signal_number)
+		{
+			case SIGHUP:
+			{
+				DBG1(DBG_DMN, "signal of type SIGHUP received. Ignored");
+				break;
+			}
+			case SIGINT:
+			{
+				DBG1(DBG_DMN, "signal of type SIGINT received. Shutting down");
+				return;
+			}
+			case SIGTERM:
+				DBG1(DBG_DMN, "signal of type SIGTERM received. Shutting down");
+				return;
+			default:
+			{
+				DBG1(DBG_DMN, "unknown signal %d received. Ignored", signal_number);
+				break;
+			}
+		}
+	}
+}
+
+/**
+ * Clean up all daemon resources
+ */
+static void destroy(private_daemon_t *this)
+{
+	/* destruction is a non trivial task, we need to follow 
+	* a strict order to prevent threading issues! 
+	* Kill active threads first, except the sender, as
+	* the killed IKE_SA want to send delete messages.
+	*/
+	/* we don't want to receive anything anymore... */
+	DESTROY_IF(this->public.receiver);
+	/* ignore all incoming user requests */
+	DESTROY_IF(this->public.stroke);
+	/* stop scheduing jobs */
+	DESTROY_IF(this->public.scheduler);
+	/* stop processing jobs */
+	DESTROY_IF(this->public.thread_pool);
+	/* shut down manager with all IKE SAs */
+	DESTROY_IF(this->public.ike_sa_manager);
+	/* all child SAs should be down now, so kill kernel interface */
+	DESTROY_IF(this->public.kernel_interface);
+	/* destroy other infrastructure */
+	DESTROY_IF(this->public.job_queue);
+	DESTROY_IF(this->public.event_queue);
+	DESTROY_IF(this->public.configuration);
+	DESTROY_IF(this->public.credentials);
+	DESTROY_IF(this->public.connections);
+	DESTROY_IF(this->public.policies);
+	sched_yield();
+	/* we hope the sender could send the outstanding deletes, but 
+	 * we shut down here at any cost */
+	DESTROY_IF(this->public.sender);
+	DESTROY_IF(this->public.socket);
+	/* before destroying bus with its listeners, rehook library logs */
+	dbg = dbg_stderr;
+	DESTROY_IF(this->public.bus);
+	DESTROY_IF(this->public.outlog);
+	DESTROY_IF(this->public.syslog);
+	DESTROY_IF(this->public.authlog);
+	free(this);
+}
+
+/**
+ * Enforce daemon shutdown, with a given reason to do so.
+ */
+static void kill_daemon(private_daemon_t *this, char *reason)
+{
+	/* we send SIGTERM, so the daemon can cleanly shut down */
+	DBG1(DBG_DMN, "killing daemon: %s", reason);
+	if (this->main_thread_id == pthread_self())
+	{
+		/* initialization failed, terminate daemon */
+		destroy(this);
+		unlink(PID_FILE);
+		exit(-1);
+	}
+	else
+	{
+		DBG1(DBG_DMN, "sending SIGTERM to ourself");
+		raise(SIGTERM);
+		/* thread must die, since he produced a ciritcal failure and can't continue */
+		pthread_exit(NULL);
+	}
+}
+
+/**
+ * Initialize the daemon, optional with a strict crl policy
+ */
+static void initialize(private_daemon_t *this, bool strict, bool syslog,
+					   level_t levels[])
+{
+	credential_store_t* credentials;
+	signal_t signal;
+	
+	/* for uncritical pseudo random numbers */
+	srandom(time(NULL) + getpid());
+	
+	/* setup bus and it's listeners first to enable log output */
+	this->public.bus = bus_create();
+	this->public.outlog = file_logger_create(stdout);
+	this->public.syslog = sys_logger_create(LOG_DAEMON);
+	this->public.authlog = sys_logger_create(LOG_AUTHPRIV);
+	this->public.bus->add_listener(this->public.bus, &this->public.syslog->listener);
+	this->public.bus->add_listener(this->public.bus, &this->public.outlog->listener);
+	this->public.bus->add_listener(this->public.bus, &this->public.authlog->listener);
+	this->public.authlog->set_level(this->public.authlog, SIG_ANY, LEVEL_AUDIT);
+	/* set up hook to log dbg message in library via charons message bus */
+	dbg = dbg_bus;
+	
+	/* apply loglevels */
+	for (signal = 0; signal < DBG_MAX; signal++)
+	{
+		if (syslog)
+		{
+			this->public.syslog->set_level(this->public.syslog,
+										   signal, levels[signal]);
+		}
+		else
+		{
+			this->public.outlog->set_level(this->public.outlog,
+										   signal, levels[signal]);
+		}
+	}
+	
+	DBG1(DBG_DMN, "starting charon (strongSwan Version %s)", VERSION);
+	
+	this->public.configuration = configuration_create();
+	this->public.socket = socket_create(IKEV2_UDP_PORT, IKEV2_NATT_PORT);
+	this->public.ike_sa_manager = ike_sa_manager_create();
+	this->public.job_queue = job_queue_create();
+	this->public.event_queue = event_queue_create();
+	this->public.connections = (connection_store_t*)local_connection_store_create();
+	this->public.policies = (policy_store_t*)local_policy_store_create();
+	this->public.credentials = (credential_store_t*)local_credential_store_create(strict);
+
+	/* initialize fetcher_t class */
+	fetcher_initialize();
+
+	/* load secrets, ca certificates and crls */
+	credentials = this->public.credentials;
+	credentials->load_ca_certificates(credentials);
+	credentials->load_ocsp_certificates(credentials);
+	credentials->load_crls(credentials);
+	credentials->load_secrets(credentials);
+	
+	/* start building threads, we are multi-threaded NOW */
+	this->public.stroke = stroke_create();
+	this->public.sender = sender_create();
+	this->public.receiver = receiver_create();
+	this->public.scheduler = scheduler_create();
+	this->public.kernel_interface = kernel_interface_create();
+	this->public.thread_pool = thread_pool_create(NUMBER_OF_WORKING_THREADS);
+}
+
+/**
+ * Handle SIGSEGV/SIGILL signals raised by threads
+ */
+void signal_handler(int signal)
+{
+#ifdef HAVE_BACKTRACE
+	void *array[20];
+	size_t size;
+	char **strings;
+	size_t i;
+
+	size = backtrace(array, 20);
+	strings = backtrace_symbols(array, size);
+
+	DBG1(DBG_DMN, "thread %u received %s. Dumping %d frames from stack:",
+		 pthread_self(), signal == SIGSEGV ? "SIGSEGV" : "SIGILL", size);
+
+	for (i = 0; i < size; i++)
+	{
+		DBG1(DBG_DMN, "    %s", strings[i]);
+	}
+	free (strings);
+#else /* !HAVE_BACKTRACE */
+	DBG1(DBG_DMN, "thread %u received %s",
+		 pthread_self(), signal == SIGSEGV ? "SIGSEGV" : "SIGILL");
+#endif /* HAVE_BACKTRACE */
+	DBG1(DBG_DMN, "killing ourself hard after SIGSEGV");
+	raise(SIGKILL);
+}
+
+/**
+ * Create the daemon.
+ */
+private_daemon_t *daemon_create(void)
+{	
+	private_daemon_t *this = malloc_thing(private_daemon_t);
+	struct sigaction action;
+		
+	/* assign methods */
+	this->public.kill = (void (*) (daemon_t*,char*))kill_daemon;
+	
+	/* NULL members for clean destruction */
+	this->public.socket = NULL;
+	this->public.ike_sa_manager = NULL;
+	this->public.job_queue = NULL;
+	this->public.event_queue = NULL;
+	this->public.configuration = NULL;
+	this->public.credentials = NULL;
+	this->public.connections = NULL;
+	this->public.policies = NULL;
+	this->public.sender= NULL;
+	this->public.receiver = NULL;
+	this->public.scheduler = NULL;
+	this->public.kernel_interface = NULL;
+	this->public.thread_pool = NULL;
+	this->public.stroke = NULL;
+	this->public.bus = NULL;
+	this->public.outlog = NULL;
+	this->public.syslog = NULL;
+	this->public.authlog = NULL;
+	
+	this->main_thread_id = pthread_self();
+	
+	/* setup signal handling for all threads */
+	sigemptyset(&(this->signal_set));
+	sigaddset(&(this->signal_set), SIGSEGV);
+	sigaddset(&(this->signal_set), SIGINT); 
+	sigaddset(&(this->signal_set), SIGHUP); 
+	sigaddset(&(this->signal_set), SIGTERM); 
+	pthread_sigmask(SIG_BLOCK, &(this->signal_set), 0);
+	
+	/* setup SIGSEGV handler for all threads */
+	action.sa_handler = signal_handler;
+	action.sa_mask = this->signal_set;
+	action.sa_flags = 0;
+	sigaction(SIGSEGV, &action, NULL);
+	sigaction(SIGILL, &action, NULL);
+	return this;
+}
+
+/**
+ * print command line usage and exit
+ */
+static void usage(const char *msg)
+{
+	if (msg != NULL && *msg != '\0')
+	{
+		fprintf(stderr, "%s\n", msg);
+	}
+	fprintf(stderr, "Usage: charon\n"
+					"         [--help]\n"
+					"         [--version]\n"
+					"         [--strictcrlpolicy]\n"
+					"         [--cachecrls]\n"
+					"         [--crlcheckinterval <interval>]\n"
+					"         [--eapdir <dir>]\n"
+					"         [--use-syslog]\n"
+					"         [--debug-<type> <level>]\n"
+					"           <type>:  log context type (dmn|mgr|ike|chd|job|cfg|knl|net|enc|lib)\n"
+					"           <level>: log verbosity (-1 = silent, 0 = audit, 1 = control,\n"
+					"                                    2 = controlmore, 3 = raw, 4 = private)\n"
+					"\n"
+		   );
+	exit(msg == NULL? 0 : 1);
+}
+
+/**
+ * Main function, manages the daemon.
+ */
+int main(int argc, char *argv[])
+{
+	u_int crl_check_interval = 0;
+	bool strict_crl_policy = FALSE;
+	bool cache_crls = FALSE;
+	bool use_syslog = FALSE;
+	char *eapdir = IPSEC_EAPDIR;
+
+	private_daemon_t *private_charon;
+	FILE *pid_file;
+	struct stat stb;
+	linked_list_t *list;
+	host_t *host;
+	level_t levels[DBG_MAX];
+	int signal;
+	
+	/* use CTRL loglevel for default */
+	for (signal = 0; signal < DBG_MAX; signal++)
+	{
+		levels[signal] = LEVEL_CTRL;
+	}
+	
+	/* handle arguments */
+	for (;;)
+	{
+		struct option long_opts[] = {
+			{ "help", no_argument, NULL, 'h' },
+			{ "version", no_argument, NULL, 'v' },
+			{ "use-syslog", no_argument, NULL, 'l' },
+			{ "strictcrlpolicy", no_argument, NULL, 'r' },
+			{ "cachecrls", no_argument, NULL, 'C' },
+			{ "crlcheckinterval", required_argument, NULL, 'x' },
+			{ "eapdir", required_argument, NULL, 'e' },
+			/* TODO: handle "debug-all" */
+			{ "debug-dmn", required_argument, &signal, DBG_DMN },
+			{ "debug-mgr", required_argument, &signal, DBG_MGR },
+			{ "debug-ike", required_argument, &signal, DBG_IKE },
+			{ "debug-chd", required_argument, &signal, DBG_CHD },
+			{ "debug-job", required_argument, &signal, DBG_JOB },
+			{ "debug-cfg", required_argument, &signal, DBG_CFG },
+			{ "debug-knl", required_argument, &signal, DBG_KNL },
+			{ "debug-net", required_argument, &signal, DBG_NET },
+			{ "debug-enc", required_argument, &signal, DBG_ENC },
+			{ "debug-lib", required_argument, &signal, DBG_LIB },
+			{ 0,0,0,0 }
+		};
+		
+		int c = getopt_long(argc, argv, "", long_opts, NULL);
+		switch (c)
+		{
+			case EOF:
+	    		break;
+			case 'h':
+				usage(NULL);
+				break;
+			case 'v':
+				printf("Linux strongSwan %s\n", VERSION);
+				exit(0);
+			case 'l':
+				use_syslog = TRUE;
+				continue;
+			case 'r':
+				strict_crl_policy = TRUE;
+				continue;
+			case 'C':
+				cache_crls = TRUE;
+				continue;
+			case 'x':
+				crl_check_interval = atoi(optarg);
+				continue;
+			case 'e':
+				eapdir = optarg;
+				continue;
+			case 0:
+				/* option is in signal */
+				levels[signal] = atoi(optarg);
+				continue;
+			default:
+				usage("");
+				break;
+		}
+		break;
+	}
+
+	private_charon = daemon_create();
+	charon = (daemon_t*)private_charon;
+	
+	/* initialize daemon */
+	initialize(private_charon, strict_crl_policy, use_syslog, levels);
+
+	/* load pluggable EAP modules */
+	eap_method_load(eapdir);
+	
+	/* set cache_crls and crl_check_interval options */
+	ca_info_set_options(cache_crls, crl_check_interval);
+
+	/* check/setup PID file */
+	if (stat(PID_FILE, &stb) == 0)
+	{
+		DBG1(DBG_DMN, "charon already running (\""PID_FILE"\" exists)");
+		destroy(private_charon);
+		exit(-1);
+	}
+	pid_file = fopen(PID_FILE, "w");
+	if (pid_file)
+	{
+		fprintf(pid_file, "%d\n", getpid());
+		fclose(pid_file);
+	}
+	
+	/* log socket info */
+	list = charon->kernel_interface->create_address_list(charon->kernel_interface);
+	DBG1(DBG_NET, "listening on %d addresses:", list->get_count(list));
+	while (list->remove_first(list, (void**)&host) == SUCCESS)
+	{
+		DBG1(DBG_NET, "  %H", host);
+		host->destroy(host);
+	}
+	list->destroy(list);
+	
+	/* run daemon */
+	run(private_charon);
+	
+	eap_method_unload();
+	fetcher_finalize();
+	/* normal termination, cleanup and exit */
+	destroy(private_charon);
+	unlink(PID_FILE);
+	
+	return 0;
+}