Moving charon to libcharon.
This commit is contained in:
Tobias Brunner
@@ -0,0 +1,753 @@
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/*
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* Copyright (C) 2006 Martin Willi
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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 "bus.h"
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#include <stdint.h>
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#include <daemon.h>
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#include <threading/thread.h>
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#include <threading/thread_value.h>
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#include <threading/condvar.h>
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#include <threading/mutex.h>
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ENUM(debug_names, DBG_DMN, DBG_LIB,
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"DMN",
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"MGR",
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"IKE",
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"CHD",
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"JOB",
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"CFG",
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"KNL",
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"NET",
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"ENC",
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"LIB",
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);
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ENUM(debug_lower_names, DBG_DMN, DBG_LIB,
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"dmn",
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"mgr",
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"ike",
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"chd",
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"job",
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"cfg",
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"knl",
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"net",
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"enc",
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"lib",
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);
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typedef struct private_bus_t private_bus_t;
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/**
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* Private data of a bus_t object.
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*/
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struct private_bus_t {
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/**
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* Public part of a bus_t object.
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*/
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bus_t public;
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/**
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* List of registered listeners as entry_t's
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*/
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linked_list_t *listeners;
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/**
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* mutex to synchronize active listeners, recursively
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*/
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mutex_t *mutex;
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/**
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* Thread local storage the threads IKE_SA
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*/
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thread_value_t *thread_sa;
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};
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typedef struct entry_t entry_t;
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/**
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* a listener entry, either active or passive
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*/
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struct entry_t {
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/**
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* registered listener interface
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*/
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listener_t *listener;
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/**
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* is this a active listen() call with a blocking thread
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*/
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bool blocker;
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/**
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* are we currently calling this listener
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*/
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int calling;
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/**
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* condvar where active listeners wait
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*/
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condvar_t *condvar;
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};
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/**
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* create a listener entry
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*/
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static entry_t *entry_create(listener_t *listener, bool blocker)
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{
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entry_t *this = malloc_thing(entry_t);
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this->listener = listener;
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this->blocker = blocker;
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this->calling = 0;
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this->condvar = condvar_create(CONDVAR_TYPE_DEFAULT);
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return this;
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}
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/**
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* destroy an entry_t
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*/
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static void entry_destroy(entry_t *entry)
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{
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entry->condvar->destroy(entry->condvar);
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free(entry);
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}
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/**
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* Implementation of bus_t.add_listener.
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*/
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static void add_listener(private_bus_t *this, listener_t *listener)
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{
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this->mutex->lock(this->mutex);
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this->listeners->insert_last(this->listeners, entry_create(listener, FALSE));
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this->mutex->unlock(this->mutex);
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}
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/**
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* Implementation of bus_t.remove_listener.
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*/
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static void remove_listener(private_bus_t *this, listener_t *listener)
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{
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enumerator_t *enumerator;
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entry_t *entry;
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this->mutex->lock(this->mutex);
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enumerator = this->listeners->create_enumerator(this->listeners);
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while (enumerator->enumerate(enumerator, &entry))
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{
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if (entry->listener == listener)
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{
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this->listeners->remove_at(this->listeners, enumerator);
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entry_destroy(entry);
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break;
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}
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}
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enumerator->destroy(enumerator);
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this->mutex->unlock(this->mutex);
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}
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typedef struct cleanup_data_t cleanup_data_t;
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/**
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* data to remove a listener using thread_cleanup_t handler
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*/
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struct cleanup_data_t {
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/** bus instance */
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private_bus_t *this;
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/** listener entry */
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entry_t *entry;
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};
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/**
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* thread_cleanup_t handler to remove a listener
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*/
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static void listener_cleanup(cleanup_data_t *data)
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{
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data->this->listeners->remove(data->this->listeners, data->entry, NULL);
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entry_destroy(data->entry);
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}
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/**
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* Implementation of bus_t.listen.
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*/
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static void listen_(private_bus_t *this, listener_t *listener, job_t *job)
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{
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bool old;
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cleanup_data_t data;
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data.this = this;
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data.entry = entry_create(listener, TRUE);
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this->mutex->lock(this->mutex);
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this->listeners->insert_last(this->listeners, data.entry);
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charon->processor->queue_job(charon->processor, job);
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thread_cleanup_push((thread_cleanup_t)this->mutex->unlock, this->mutex);
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thread_cleanup_push((thread_cleanup_t)listener_cleanup, &data);
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old = thread_cancelability(TRUE);
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while (data.entry->blocker)
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{
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data.entry->condvar->wait(data.entry->condvar, this->mutex);
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}
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thread_cancelability(old);
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thread_cleanup_pop(FALSE);
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/* unlock mutex */
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thread_cleanup_pop(TRUE);
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entry_destroy(data.entry);
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}
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/**
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* Implementation of bus_t.set_sa.
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*/
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static void set_sa(private_bus_t *this, ike_sa_t *ike_sa)
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{
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this->thread_sa->set(this->thread_sa, ike_sa);
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}
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/**
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* Implementation of bus_t.get_sa
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*/
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static ike_sa_t* get_sa(private_bus_t *this)
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{
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return this->thread_sa->get(this->thread_sa);
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}
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/**
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* data associated to a signal, passed to callback
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*/
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typedef struct {
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/** associated IKE_SA */
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ike_sa_t *ike_sa;
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/** invoking thread */
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long thread;
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/** debug group */
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debug_t group;
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/** debug level */
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level_t level;
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/** format string */
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char *format;
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/** argument list */
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va_list args;
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} log_data_t;
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/**
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* listener->log() invocation as a list remove callback
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*/
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static bool log_cb(entry_t *entry, log_data_t *data)
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{
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va_list args;
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if (entry->calling || !entry->listener->log)
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{ /* avoid recursive calls */
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return FALSE;
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}
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entry->calling++;
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va_copy(args, data->args);
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if (!entry->listener->log(entry->listener, data->group, data->level,
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data->thread, data->ike_sa, data->format, args))
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{
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if (entry->blocker)
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{
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entry->blocker = FALSE;
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entry->condvar->signal(entry->condvar);
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}
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else
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{
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entry_destroy(entry);
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}
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va_end(args);
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entry->calling--;
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return TRUE;
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}
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va_end(args);
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entry->calling--;
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return FALSE;
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}
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/**
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* Implementation of bus_t.vlog.
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*/
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static void vlog(private_bus_t *this, debug_t group, level_t level,
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char* format, va_list args)
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{
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log_data_t data;
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data.ike_sa = this->thread_sa->get(this->thread_sa);
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data.thread = thread_current_id();
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data.group = group;
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data.level = level;
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data.format = format;
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va_copy(data.args, args);
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this->mutex->lock(this->mutex);
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/* We use the remove() method to invoke all listeners. This is cheap and
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* does not require an allocation for this performance critical function. */
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this->listeners->remove(this->listeners, &data, (void*)log_cb);
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this->mutex->unlock(this->mutex);
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va_end(data.args);
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}
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/**
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* Implementation of bus_t.log.
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*/
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static void log_(private_bus_t *this, debug_t group, level_t level,
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char* format, ...)
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{
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va_list args;
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va_start(args, format);
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vlog(this, group, level, format, args);
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va_end(args);
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}
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/**
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* unregister a listener
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*/
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static void unregister_listener(private_bus_t *this, entry_t *entry,
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enumerator_t *enumerator)
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{
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if (entry->blocker)
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{
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entry->blocker = FALSE;
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entry->condvar->signal(entry->condvar);
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}
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else
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{
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entry_destroy(entry);
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}
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this->listeners->remove_at(this->listeners, enumerator);
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}
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/**
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* Implementation of bus_t.alert
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*/
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static void alert(private_bus_t *this, alert_t alert, ...)
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{
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enumerator_t *enumerator;
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ike_sa_t *ike_sa;
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entry_t *entry;
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va_list args;
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bool keep;
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ike_sa = this->thread_sa->get(this->thread_sa);
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this->mutex->lock(this->mutex);
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enumerator = this->listeners->create_enumerator(this->listeners);
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while (enumerator->enumerate(enumerator, &entry))
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{
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if (entry->calling || !entry->listener->alert)
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{
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continue;
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}
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entry->calling++;
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va_start(args, alert);
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keep = entry->listener->alert(entry->listener, ike_sa, alert, args);
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va_end(args);
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entry->calling--;
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if (!keep)
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{
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unregister_listener(this, entry, enumerator);
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}
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}
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enumerator->destroy(enumerator);
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this->mutex->unlock(this->mutex);
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}
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/**
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* Implementation of bus_t.ike_state_change
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*/
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static void ike_state_change(private_bus_t *this, ike_sa_t *ike_sa,
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ike_sa_state_t state)
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{
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enumerator_t *enumerator;
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entry_t *entry;
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bool keep;
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this->mutex->lock(this->mutex);
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enumerator = this->listeners->create_enumerator(this->listeners);
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while (enumerator->enumerate(enumerator, &entry))
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{
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if (entry->calling || !entry->listener->ike_state_change)
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{
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continue;
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}
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entry->calling++;
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keep = entry->listener->ike_state_change(entry->listener, ike_sa, state);
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entry->calling--;
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if (!keep)
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{
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unregister_listener(this, entry, enumerator);
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}
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}
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enumerator->destroy(enumerator);
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this->mutex->unlock(this->mutex);
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}
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/**
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* Implementation of bus_t.child_state_change
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*/
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static void child_state_change(private_bus_t *this, child_sa_t *child_sa,
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child_sa_state_t state)
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{
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enumerator_t *enumerator;
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ike_sa_t *ike_sa;
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entry_t *entry;
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bool keep;
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ike_sa = this->thread_sa->get(this->thread_sa);
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this->mutex->lock(this->mutex);
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enumerator = this->listeners->create_enumerator(this->listeners);
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while (enumerator->enumerate(enumerator, &entry))
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{
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if (entry->calling || !entry->listener->child_state_change)
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{
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continue;
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}
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entry->calling++;
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keep = entry->listener->child_state_change(entry->listener, ike_sa,
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child_sa, state);
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entry->calling--;
|
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if (!keep)
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{
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unregister_listener(this, entry, enumerator);
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}
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}
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enumerator->destroy(enumerator);
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this->mutex->unlock(this->mutex);
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||||
}
|
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|
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/**
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* Implementation of bus_t.message
|
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*/
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static void message(private_bus_t *this, message_t *message, bool incoming)
|
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{
|
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enumerator_t *enumerator;
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ike_sa_t *ike_sa;
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entry_t *entry;
|
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bool keep;
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ike_sa = this->thread_sa->get(this->thread_sa);
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this->mutex->lock(this->mutex);
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enumerator = this->listeners->create_enumerator(this->listeners);
|
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while (enumerator->enumerate(enumerator, &entry))
|
||||
{
|
||||
if (entry->calling || !entry->listener->message)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
entry->calling++;
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||||
keep = entry->listener->message(entry->listener, ike_sa,
|
||||
message, incoming);
|
||||
entry->calling--;
|
||||
if (!keep)
|
||||
{
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||||
unregister_listener(this, entry, enumerator);
|
||||
}
|
||||
}
|
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enumerator->destroy(enumerator);
|
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this->mutex->unlock(this->mutex);
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of bus_t.ike_keys
|
||||
*/
|
||||
static void ike_keys(private_bus_t *this, ike_sa_t *ike_sa,
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||||
diffie_hellman_t *dh, chunk_t nonce_i, chunk_t nonce_r,
|
||||
ike_sa_t *rekey)
|
||||
{
|
||||
enumerator_t *enumerator;
|
||||
entry_t *entry;
|
||||
bool keep;
|
||||
|
||||
this->mutex->lock(this->mutex);
|
||||
enumerator = this->listeners->create_enumerator(this->listeners);
|
||||
while (enumerator->enumerate(enumerator, &entry))
|
||||
{
|
||||
if (entry->calling || !entry->listener->ike_keys)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
entry->calling++;
|
||||
keep = entry->listener->ike_keys(entry->listener, ike_sa, dh,
|
||||
nonce_i, nonce_r, rekey);
|
||||
entry->calling--;
|
||||
if (!keep)
|
||||
{
|
||||
unregister_listener(this, entry, enumerator);
|
||||
}
|
||||
}
|
||||
enumerator->destroy(enumerator);
|
||||
this->mutex->unlock(this->mutex);
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of bus_t.child_keys
|
||||
*/
|
||||
static void child_keys(private_bus_t *this, child_sa_t *child_sa,
|
||||
diffie_hellman_t *dh, chunk_t nonce_i, chunk_t nonce_r)
|
||||
{
|
||||
enumerator_t *enumerator;
|
||||
ike_sa_t *ike_sa;
|
||||
entry_t *entry;
|
||||
bool keep;
|
||||
|
||||
ike_sa = this->thread_sa->get(this->thread_sa);
|
||||
|
||||
this->mutex->lock(this->mutex);
|
||||
enumerator = this->listeners->create_enumerator(this->listeners);
|
||||
while (enumerator->enumerate(enumerator, &entry))
|
||||
{
|
||||
if (entry->calling || !entry->listener->child_keys)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
entry->calling++;
|
||||
keep = entry->listener->child_keys(entry->listener, ike_sa, child_sa,
|
||||
dh, nonce_i, nonce_r);
|
||||
entry->calling--;
|
||||
if (!keep)
|
||||
{
|
||||
unregister_listener(this, entry, enumerator);
|
||||
}
|
||||
}
|
||||
enumerator->destroy(enumerator);
|
||||
this->mutex->unlock(this->mutex);
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of bus_t.child_updown
|
||||
*/
|
||||
static void child_updown(private_bus_t *this, child_sa_t *child_sa, bool up)
|
||||
{
|
||||
enumerator_t *enumerator;
|
||||
ike_sa_t *ike_sa;
|
||||
entry_t *entry;
|
||||
bool keep;
|
||||
|
||||
ike_sa = this->thread_sa->get(this->thread_sa);
|
||||
|
||||
this->mutex->lock(this->mutex);
|
||||
enumerator = this->listeners->create_enumerator(this->listeners);
|
||||
while (enumerator->enumerate(enumerator, &entry))
|
||||
{
|
||||
if (entry->calling || !entry->listener->child_updown)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
entry->calling++;
|
||||
keep = entry->listener->child_updown(entry->listener,
|
||||
ike_sa, child_sa, up);
|
||||
entry->calling--;
|
||||
if (!keep)
|
||||
{
|
||||
unregister_listener(this, entry, enumerator);
|
||||
}
|
||||
}
|
||||
enumerator->destroy(enumerator);
|
||||
this->mutex->unlock(this->mutex);
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of bus_t.child_rekey
|
||||
*/
|
||||
static void child_rekey(private_bus_t *this, child_sa_t *old, child_sa_t *new)
|
||||
{
|
||||
enumerator_t *enumerator;
|
||||
ike_sa_t *ike_sa;
|
||||
entry_t *entry;
|
||||
bool keep;
|
||||
|
||||
ike_sa = this->thread_sa->get(this->thread_sa);
|
||||
|
||||
this->mutex->lock(this->mutex);
|
||||
enumerator = this->listeners->create_enumerator(this->listeners);
|
||||
while (enumerator->enumerate(enumerator, &entry))
|
||||
{
|
||||
if (entry->calling || !entry->listener->child_rekey)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
entry->calling++;
|
||||
keep = entry->listener->child_rekey(entry->listener, ike_sa, old, new);
|
||||
entry->calling--;
|
||||
if (!keep)
|
||||
{
|
||||
unregister_listener(this, entry, enumerator);
|
||||
}
|
||||
}
|
||||
enumerator->destroy(enumerator);
|
||||
this->mutex->unlock(this->mutex);
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of bus_t.ike_updown
|
||||
*/
|
||||
static void ike_updown(private_bus_t *this, ike_sa_t *ike_sa, bool up)
|
||||
{
|
||||
enumerator_t *enumerator;
|
||||
entry_t *entry;
|
||||
bool keep;
|
||||
|
||||
this->mutex->lock(this->mutex);
|
||||
enumerator = this->listeners->create_enumerator(this->listeners);
|
||||
while (enumerator->enumerate(enumerator, &entry))
|
||||
{
|
||||
if (entry->calling || !entry->listener->ike_updown)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
entry->calling++;
|
||||
keep = entry->listener->ike_updown(entry->listener, ike_sa, up);
|
||||
entry->calling--;
|
||||
if (!keep)
|
||||
{
|
||||
unregister_listener(this, entry, enumerator);
|
||||
}
|
||||
}
|
||||
enumerator->destroy(enumerator);
|
||||
this->mutex->unlock(this->mutex);
|
||||
|
||||
/* a down event for IKE_SA implicitly downs all CHILD_SAs */
|
||||
if (!up)
|
||||
{
|
||||
iterator_t *iterator;
|
||||
child_sa_t *child_sa;
|
||||
|
||||
iterator = ike_sa->create_child_sa_iterator(ike_sa);
|
||||
while (iterator->iterate(iterator, (void**)&child_sa))
|
||||
{
|
||||
child_updown(this, child_sa, FALSE);
|
||||
}
|
||||
iterator->destroy(iterator);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of bus_t.ike_rekey
|
||||
*/
|
||||
static void ike_rekey(private_bus_t *this, ike_sa_t *old, ike_sa_t *new)
|
||||
{
|
||||
enumerator_t *enumerator;
|
||||
entry_t *entry;
|
||||
bool keep;
|
||||
|
||||
this->mutex->lock(this->mutex);
|
||||
enumerator = this->listeners->create_enumerator(this->listeners);
|
||||
while (enumerator->enumerate(enumerator, &entry))
|
||||
{
|
||||
if (entry->calling || !entry->listener->ike_rekey)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
entry->calling++;
|
||||
keep = entry->listener->ike_rekey(entry->listener, old, new);
|
||||
entry->calling--;
|
||||
if (!keep)
|
||||
{
|
||||
unregister_listener(this, entry, enumerator);
|
||||
}
|
||||
}
|
||||
enumerator->destroy(enumerator);
|
||||
this->mutex->unlock(this->mutex);
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of bus_t.authorize
|
||||
*/
|
||||
static bool authorize(private_bus_t *this, bool final)
|
||||
{
|
||||
enumerator_t *enumerator;
|
||||
ike_sa_t *ike_sa;
|
||||
entry_t *entry;
|
||||
bool keep, success = TRUE;
|
||||
|
||||
ike_sa = this->thread_sa->get(this->thread_sa);
|
||||
|
||||
this->mutex->lock(this->mutex);
|
||||
enumerator = this->listeners->create_enumerator(this->listeners);
|
||||
while (enumerator->enumerate(enumerator, &entry))
|
||||
{
|
||||
if (entry->calling || !entry->listener->authorize)
|
||||
{
|
||||
continue;
|
||||
}
|
||||
entry->calling++;
|
||||
keep = entry->listener->authorize(entry->listener, ike_sa,
|
||||
final, &success);
|
||||
entry->calling--;
|
||||
if (!keep)
|
||||
{
|
||||
unregister_listener(this, entry, enumerator);
|
||||
}
|
||||
if (!success)
|
||||
{
|
||||
break;
|
||||
}
|
||||
}
|
||||
enumerator->destroy(enumerator);
|
||||
this->mutex->unlock(this->mutex);
|
||||
return success;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implementation of bus_t.destroy.
|
||||
*/
|
||||
static void destroy(private_bus_t *this)
|
||||
{
|
||||
this->thread_sa->destroy(this->thread_sa);
|
||||
this->mutex->destroy(this->mutex);
|
||||
this->listeners->destroy_function(this->listeners, (void*)entry_destroy);
|
||||
free(this);
|
||||
}
|
||||
|
||||
/*
|
||||
* Described in header.
|
||||
*/
|
||||
bus_t *bus_create()
|
||||
{
|
||||
private_bus_t *this = malloc_thing(private_bus_t);
|
||||
|
||||
this->public.add_listener = (void(*)(bus_t*,listener_t*))add_listener;
|
||||
this->public.remove_listener = (void(*)(bus_t*,listener_t*))remove_listener;
|
||||
this->public.listen = (void(*)(bus_t*, listener_t *listener, job_t *job))listen_;
|
||||
this->public.set_sa = (void(*)(bus_t*,ike_sa_t*))set_sa;
|
||||
this->public.get_sa = (ike_sa_t*(*)(bus_t*))get_sa;
|
||||
this->public.log = (void(*)(bus_t*,debug_t,level_t,char*,...))log_;
|
||||
this->public.vlog = (void(*)(bus_t*,debug_t,level_t,char*,va_list))vlog;
|
||||
this->public.alert = (void(*)(bus_t*, alert_t alert, ...))alert;
|
||||
this->public.ike_state_change = (void(*)(bus_t*,ike_sa_t*,ike_sa_state_t))ike_state_change;
|
||||
this->public.child_state_change = (void(*)(bus_t*,child_sa_t*,child_sa_state_t))child_state_change;
|
||||
this->public.message = (void(*)(bus_t*, message_t *message, bool incoming))message;
|
||||
this->public.ike_keys = (void(*)(bus_t*, ike_sa_t *ike_sa, diffie_hellman_t *dh, chunk_t nonce_i, chunk_t nonce_r, ike_sa_t *rekey))ike_keys;
|
||||
this->public.child_keys = (void(*)(bus_t*, child_sa_t *child_sa, diffie_hellman_t *dh, chunk_t nonce_i, chunk_t nonce_r))child_keys;
|
||||
this->public.ike_updown = (void(*)(bus_t*, ike_sa_t *ike_sa, bool up))ike_updown;
|
||||
this->public.ike_rekey = (void(*)(bus_t*, ike_sa_t *old, ike_sa_t *new))ike_rekey;
|
||||
this->public.child_updown = (void(*)(bus_t*, child_sa_t *child_sa, bool up))child_updown;
|
||||
this->public.child_rekey = (void(*)(bus_t*, child_sa_t *old, child_sa_t *new))child_rekey;
|
||||
this->public.authorize = (bool(*)(bus_t*, bool final))authorize;
|
||||
this->public.destroy = (void(*)(bus_t*)) destroy;
|
||||
|
||||
this->listeners = linked_list_create();
|
||||
this->mutex = mutex_create(MUTEX_TYPE_RECURSIVE);
|
||||
this->thread_sa = thread_value_create(NULL);
|
||||
|
||||
return &this->public;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user