350 lines
8.4 KiB
C
350 lines
8.4 KiB
C
/*
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* Copyright (C) 2006-2010 Tobias Brunner
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* Copyright (C) 2005-2009 Martin Willi
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* Copyright (C) 2006 Daniel Roethlisberger
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* Copyright (C) 2005 Jan Hutter
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* Hochschule fuer Technik Rapperswil
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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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#include <stdio.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <time.h>
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#ifdef CAPABILITIES
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# ifdef HAVE_SYS_CAPABILITY_H
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# include <sys/capability.h>
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# elif defined(CAPABILITIES_NATIVE)
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# include <linux/capability.h>
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# endif /* CAPABILITIES_NATIVE */
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#endif /* CAPABILITIES */
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#define USE_TNC /* for tnccs_manager */
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#include "daemon.h"
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#include <library.h>
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#include <config/proposal.h>
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#include <kernel/kernel_handler.h>
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#include <processing/jobs/start_action_job.h>
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typedef struct private_daemon_t private_daemon_t;
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/**
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* Private additions to daemon_t, contains threads and internal functions.
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*/
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struct private_daemon_t {
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/**
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* Public members of daemon_t.
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*/
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daemon_t public;
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/**
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* Handler for kernel events
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*/
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kernel_handler_t *kernel_handler;
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/**
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* capabilities to keep
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*/
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#ifdef CAPABILITIES_LIBCAP
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cap_t caps;
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#endif /* CAPABILITIES_LIBCAP */
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#ifdef CAPABILITIES_NATIVE
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struct __user_cap_data_struct caps[2];
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#endif /* CAPABILITIES_NATIVE */
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};
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/**
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* One and only instance of the daemon.
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*/
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daemon_t *charon;
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/**
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* hook in library for debugging messages
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*/
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extern void (*dbg) (debug_t group, level_t level, char *fmt, ...);
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/**
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* we store the previous debug function so we can reset it
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*/
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static void (*dbg_old) (debug_t group, level_t level, char *fmt, ...);
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/**
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* Logging hook for library logs, spreads debug message over bus
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*/
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static void dbg_bus(debug_t group, level_t level, char *fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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charon->bus->vlog(charon->bus, group, level, fmt, args);
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va_end(args);
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}
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/**
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* Clean up all daemon resources
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*/
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static void destroy(private_daemon_t *this)
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{
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/* terminate all idle threads */
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lib->processor->set_threads(lib->processor, 0);
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/* close all IKE_SAs */
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if (this->public.ike_sa_manager)
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{
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this->public.ike_sa_manager->flush(this->public.ike_sa_manager);
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}
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DESTROY_IF(this->public.receiver);
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DESTROY_IF(this->public.sender);
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/* unload plugins to release threads */
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lib->plugins->unload(lib->plugins);
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#ifdef CAPABILITIES_LIBCAP
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cap_free(this->caps);
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#endif /* CAPABILITIES_LIBCAP */
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DESTROY_IF(this->kernel_handler);
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DESTROY_IF(this->public.traps);
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DESTROY_IF(this->public.shunts);
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DESTROY_IF(this->public.ike_sa_manager);
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DESTROY_IF(this->public.controller);
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DESTROY_IF(this->public.eap);
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DESTROY_IF(this->public.tnccs);
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#ifdef ME
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DESTROY_IF(this->public.connect_manager);
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DESTROY_IF(this->public.mediation_manager);
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#endif /* ME */
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DESTROY_IF(this->public.backends);
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DESTROY_IF(this->public.socket);
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/* rehook library logging, shutdown logging */
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dbg = dbg_old;
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DESTROY_IF(this->public.bus);
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this->public.file_loggers->destroy_offset(this->public.file_loggers,
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offsetof(file_logger_t, destroy));
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this->public.sys_loggers->destroy_offset(this->public.sys_loggers,
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offsetof(sys_logger_t, destroy));
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free(this);
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}
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METHOD(daemon_t, keep_cap, void,
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private_daemon_t *this, u_int cap)
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{
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#ifdef CAPABILITIES_LIBCAP
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cap_set_flag(this->caps, CAP_EFFECTIVE, 1, &cap, CAP_SET);
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cap_set_flag(this->caps, CAP_INHERITABLE, 1, &cap, CAP_SET);
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cap_set_flag(this->caps, CAP_PERMITTED, 1, &cap, CAP_SET);
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#endif /* CAPABILITIES_LIBCAP */
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#ifdef CAPABILITIES_NATIVE
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int i = 0;
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if (cap >= 32)
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{
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i++;
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cap -= 32;
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}
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this->caps[i].effective |= 1 << cap;
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this->caps[i].permitted |= 1 << cap;
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this->caps[i].inheritable |= 1 << cap;
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#endif /* CAPABILITIES_NATIVE */
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}
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METHOD(daemon_t, drop_capabilities, bool,
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private_daemon_t *this)
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{
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#ifdef CAPABILITIES_LIBCAP
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if (cap_set_proc(this->caps) != 0)
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{
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return FALSE;
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}
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#endif /* CAPABILITIES_LIBCAP */
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#ifdef CAPABILITIES_NATIVE
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struct __user_cap_header_struct header = {
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#if defined(_LINUX_CAPABILITY_VERSION_3)
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.version = _LINUX_CAPABILITY_VERSION_3,
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#elif defined(_LINUX_CAPABILITY_VERSION_2)
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.version = _LINUX_CAPABILITY_VERSION_2,
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#elif defined(_LINUX_CAPABILITY_VERSION_1)
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.version = _LINUX_CAPABILITY_VERSION_1,
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#else
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.version = _LINUX_CAPABILITY_VERSION,
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#endif
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};
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if (capset(&header, this->caps) != 0)
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{
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return FALSE;
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}
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#endif /* CAPABILITIES_NATIVE */
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return TRUE;
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}
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METHOD(daemon_t, start, void,
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private_daemon_t *this)
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{
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/* start the engine, go multithreaded */
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lib->processor->set_threads(lib->processor,
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lib->settings->get_int(lib->settings, "charon.threads",
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DEFAULT_THREADS));
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}
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/**
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* Log loaded plugins
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*/
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static void print_plugins()
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{
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char buf[512];
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int len = 0;
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enumerator_t *enumerator;
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plugin_t *plugin;
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buf[0] = '\0';
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enumerator = lib->plugins->create_plugin_enumerator(lib->plugins);
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while (len < sizeof(buf) && enumerator->enumerate(enumerator, &plugin))
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{
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len += snprintf(&buf[len], sizeof(buf)-len, "%s ",
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plugin->get_name(plugin));
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}
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enumerator->destroy(enumerator);
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DBG1(DBG_DMN, "loaded plugins: %s", buf);
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}
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METHOD(daemon_t, initialize, bool,
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private_daemon_t *this)
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{
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DBG1(DBG_DMN, "Starting IKEv2 charon daemon (strongSwan "VERSION")");
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if (lib->integrity)
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{
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DBG1(DBG_DMN, "integrity tests enabled:");
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DBG1(DBG_DMN, "lib 'libstrongswan': passed file and segment integrity tests");
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DBG1(DBG_DMN, "lib 'libhydra': passed file and segment integrity tests");
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DBG1(DBG_DMN, "lib 'libcharon': passed file and segment integrity tests");
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DBG1(DBG_DMN, "daemon 'charon': passed file integrity test");
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}
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/* load plugins, further infrastructure may need it */
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if (!lib->plugins->load(lib->plugins, NULL,
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lib->settings->get_str(lib->settings, "charon.load", PLUGINS)))
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{
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return FALSE;
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}
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print_plugins();
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this->public.ike_sa_manager = ike_sa_manager_create();
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if (this->public.ike_sa_manager == NULL)
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{
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return FALSE;
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}
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this->public.sender = sender_create();
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this->public.receiver = receiver_create();
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if (this->public.receiver == NULL)
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{
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return FALSE;
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}
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/* Queue start_action job */
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lib->processor->queue_job(lib->processor, (job_t*)start_action_job_create());
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#ifdef ME
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this->public.connect_manager = connect_manager_create();
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if (this->public.connect_manager == NULL)
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{
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return FALSE;
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}
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this->public.mediation_manager = mediation_manager_create();
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#endif /* ME */
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return TRUE;
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}
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/**
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* Create the daemon.
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*/
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private_daemon_t *daemon_create()
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{
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private_daemon_t *this;
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INIT(this,
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.public = {
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.keep_cap = _keep_cap,
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.drop_capabilities = _drop_capabilities,
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.initialize = _initialize,
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.start = _start,
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.bus = bus_create(),
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.file_loggers = linked_list_create(),
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.sys_loggers = linked_list_create(),
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},
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);
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charon = &this->public;
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this->public.controller = controller_create();
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this->public.eap = eap_manager_create();
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this->public.tnccs = tnccs_manager_create();
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this->public.backends = backend_manager_create();
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this->public.socket = socket_manager_create();
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this->public.traps = trap_manager_create();
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this->public.shunts = shunt_manager_create();
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this->kernel_handler = kernel_handler_create();
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#ifdef CAPABILITIES
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#ifdef CAPABILITIES_LIBCAP
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this->caps = cap_init();
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#endif /* CAPABILITIES_LIBCAP */
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keep_cap(this, CAP_NET_ADMIN);
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if (lib->leak_detective)
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{
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keep_cap(this, CAP_SYS_NICE);
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}
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#endif /* CAPABILITIES */
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return this;
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}
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/**
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* Described in header.
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*/
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void libcharon_deinit()
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{
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destroy((private_daemon_t*)charon);
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charon = NULL;
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}
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/**
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* Described in header.
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*/
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bool libcharon_init()
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{
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daemon_create();
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/* for uncritical pseudo random numbers */
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srandom(time(NULL) + getpid());
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/* set up hook to log dbg message in library via charons message bus */
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dbg_old = dbg;
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dbg = dbg_bus;
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lib->printf_hook->add_handler(lib->printf_hook, 'P',
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proposal_printf_hook,
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PRINTF_HOOK_ARGTYPE_POINTER,
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PRINTF_HOOK_ARGTYPE_END);
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if (lib->integrity &&
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!lib->integrity->check(lib->integrity, "libcharon", libcharon_init))
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{
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dbg(DBG_DMN, 1, "integrity check of libcharon failed");
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return FALSE;
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}
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return TRUE;
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}
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