2006-09-27 14:14:44 +00:00
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/**
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* @file bus.c
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*
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* @brief Implementation of bus_t.
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*
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*/
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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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2006-10-18 11:46:13 +00:00
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#include <pthread.h>
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2007-11-15 18:35:54 +00:00
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#include <daemon.h>
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2006-10-18 11:46:13 +00:00
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ENUM(signal_names, SIG_ANY, SIG_MAX,
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/** should not get printed */
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"SIG_ANY",
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/** debugging message types */
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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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/** should not get printed */
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"SIG_DBG_MAX",
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/** all level0 signals are AUDIT signals */
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2006-10-28 15:24:59 +00:00
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"AUD", "AUD", "AUD",
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"AUD", "AUD", "AUD",
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"AUD", "AUD", "AUD",
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"AUD", "AUD", "AUD",
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"AUD", "AUD", "AUD",
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"AUD", "AUD", "AUD",
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"AUD", "AUD", "AUD",
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"AUD", "AUD", "AUD",
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2006-10-18 11:46:13 +00:00
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/** should not get printed */
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"SIG_MAX",
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);
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2007-11-15 18:35:54 +00:00
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typedef struct private_bus_t private_bus_t;
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2006-10-18 11:46:13 +00:00
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/**
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2007-11-15 18:35:54 +00:00
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* Private data of a bus_t object.
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2006-10-18 11:46:13 +00:00
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*/
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2007-11-15 18:35:54 +00:00
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struct private_bus_t {
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2006-10-18 11:46:13 +00:00
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/**
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2007-11-15 18:35:54 +00:00
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* Public part of a bus_t object.
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2006-10-18 11:46:13 +00:00
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*/
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2007-11-15 18:35:54 +00:00
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bus_t public;
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2006-10-18 11:46:13 +00:00
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/**
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2007-11-15 18:35:54 +00:00
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* List of registered listeners as entry_t's
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2006-10-18 11:46:13 +00:00
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*/
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2007-11-15 18:35:54 +00:00
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linked_list_t *listeners;
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2006-10-18 11:46:13 +00:00
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/**
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2007-11-15 18:35:54 +00:00
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* mutex to synchronize active listeners
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2006-10-18 11:46:13 +00:00
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*/
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2007-11-15 18:35:54 +00:00
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pthread_mutex_t mutex;
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2006-10-18 11:46:13 +00:00
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/**
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2007-11-15 18:35:54 +00:00
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* Thread local storage for a unique, simple thread ID
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2006-10-18 11:46:13 +00:00
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*/
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2007-11-15 18:35:54 +00:00
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pthread_key_t thread_id;
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2006-10-18 11:46:13 +00:00
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/**
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2007-11-15 18:35:54 +00:00
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* Thread local storage the threads IKE_SA
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2006-10-18 11:46:13 +00:00
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*/
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2007-11-15 18:35:54 +00:00
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pthread_key_t thread_sa;
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2006-10-18 11:46:13 +00:00
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};
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2007-11-15 18:35:54 +00:00
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typedef struct entry_t entry_t;
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2006-09-27 14:14:44 +00:00
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/**
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2007-11-15 18:35:54 +00:00
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* a listener entry, either active or passive
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2006-09-27 14:14:44 +00:00
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*/
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2007-11-15 18:35:54 +00:00
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struct entry_t {
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2006-10-18 11:46:13 +00:00
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/**
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2007-11-15 18:35:54 +00:00
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* registered listener interface
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2006-10-18 11:46:13 +00:00
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*/
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2007-11-15 18:35:54 +00:00
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bus_listener_t *listener;
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2006-10-18 11:46:13 +00:00
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/**
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2007-11-15 18:35:54 +00:00
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* is this a active listen() call with a blocking thread
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2006-10-18 11:46:13 +00:00
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*/
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2007-11-15 18:35:54 +00:00
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bool blocker;
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2006-10-18 11:46:13 +00:00
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2006-09-27 14:14:44 +00:00
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/**
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2007-11-15 18:35:54 +00:00
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* condvar where active listeners wait
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2006-09-27 14:14:44 +00:00
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*/
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2007-11-15 18:35:54 +00:00
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pthread_cond_t cond;
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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(bus_listener_t *listener, bool blocker)
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{
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entry_t *this = malloc_thing(entry_t);
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2006-09-27 14:14:44 +00:00
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2007-11-15 18:35:54 +00:00
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this->listener = listener;
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this->blocker = blocker;
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pthread_cond_init(&this->cond, NULL);
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2006-09-27 14:14:44 +00:00
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2007-11-15 18:35:54 +00:00
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return this;
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}
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2006-09-27 14:14:44 +00:00
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/**
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* Get a unique thread number for a calling thread. Since
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* pthread_self returns large and ugly numbers, use this function
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* for logging; these numbers are incremental starting at 1
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*/
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static int get_thread_number(private_bus_t *this)
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{
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2006-11-01 10:57:08 +00:00
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static long current_num = 0;
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2007-11-15 18:35:54 +00:00
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long stored_num;
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2006-09-27 14:14:44 +00:00
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2006-11-01 10:57:08 +00:00
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stored_num = (long)pthread_getspecific(this->thread_id);
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2006-09-27 14:14:44 +00:00
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if (stored_num == 0)
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{ /* first call of current thread */
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2006-11-01 10:57:08 +00:00
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pthread_setspecific(this->thread_id, (void*)++current_num);
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2006-09-27 14:14:44 +00:00
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return current_num;
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}
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else
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{
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return stored_num;
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}
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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, bus_listener_t *listener)
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{
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2006-10-18 11:46:13 +00:00
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pthread_mutex_lock(&this->mutex);
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2007-11-15 18:35:54 +00:00
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this->listeners->insert_last(this->listeners, entry_create(listener, FALSE));
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2006-10-18 11:46:13 +00:00
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pthread_mutex_unlock(&this->mutex);
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}
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2007-05-23 09:08:13 +00:00
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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, bus_listener_t *listener)
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{
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iterator_t *iterator;
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2007-11-15 18:35:54 +00:00
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entry_t *entry;
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2007-05-23 09:08:13 +00:00
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pthread_mutex_lock(&this->mutex);
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iterator = this->listeners->create_iterator(this->listeners, TRUE);
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2007-11-15 18:35:54 +00:00
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while (iterator->iterate(iterator, (void**)&entry))
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2007-05-23 09:08:13 +00:00
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{
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2007-11-15 18:35:54 +00:00
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if (entry->listener == listener)
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2007-05-23 09:08:13 +00:00
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{
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iterator->remove(iterator);
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2007-11-15 18:35:54 +00:00
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free(entry);
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2007-05-23 09:08:13 +00:00
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break;
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}
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}
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iterator->destroy(iterator);
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pthread_mutex_unlock(&this->mutex);
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}
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2006-10-18 11:46:13 +00:00
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/**
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* Implementation of bus_t.listen.
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*/
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2007-11-15 18:35:54 +00:00
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static void listen_(private_bus_t *this, bus_listener_t *listener, job_t *job)
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2006-10-18 11:46:13 +00:00
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{
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2007-11-15 18:35:54 +00:00
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entry_t *entry;
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int old;
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2006-10-18 11:46:13 +00:00
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2007-11-15 18:35:54 +00:00
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entry = entry_create(listener, TRUE);
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2006-09-27 14:14:44 +00:00
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2006-10-18 11:46:13 +00:00
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pthread_mutex_lock(&this->mutex);
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2007-11-15 18:35:54 +00:00
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this->listeners->insert_last(this->listeners, entry);
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charon->processor->queue_job(charon->processor, job);
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pthread_cleanup_push((void*)pthread_mutex_unlock, &this->mutex);
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pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old);
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while (entry->blocker)
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2006-10-18 11:46:13 +00:00
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{
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2007-11-15 18:35:54 +00:00
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pthread_cond_wait(&entry->cond, &this->mutex);
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2006-10-18 11:46:13 +00:00
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}
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2007-11-15 18:35:54 +00:00
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pthread_setcancelstate(old, NULL);
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pthread_cleanup_pop(TRUE);
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free(entry);
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2006-10-18 11:46:13 +00:00
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}
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2006-09-27 14:14:44 +00:00
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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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pthread_setspecific(this->thread_sa, ike_sa);
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}
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/**
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2006-10-18 11:46:13 +00:00
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* Implementation of bus_t.vsignal.
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2006-09-27 14:14:44 +00:00
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*/
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2006-10-18 11:46:13 +00:00
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static void vsignal(private_bus_t *this, signal_t signal, level_t level,
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char* format, va_list args)
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2006-09-27 14:14:44 +00:00
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{
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iterator_t *iterator;
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2007-11-15 18:35:54 +00:00
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entry_t *entry;
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2006-09-27 14:14:44 +00:00
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ike_sa_t *ike_sa;
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2006-10-30 14:07:05 +00:00
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long thread;
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2006-09-27 14:14:44 +00:00
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2007-11-15 18:35:54 +00:00
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pthread_mutex_lock(&this->mutex);
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2006-09-27 14:14:44 +00:00
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ike_sa = pthread_getspecific(this->thread_sa);
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thread = get_thread_number(this);
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iterator = this->listeners->create_iterator(this->listeners, TRUE);
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2007-11-15 18:35:54 +00:00
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while (iterator->iterate(iterator, (void**)&entry))
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2006-09-27 14:14:44 +00:00
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{
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2006-10-18 11:46:13 +00:00
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va_list args_copy;
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va_copy(args_copy, args);
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2007-11-15 18:35:54 +00:00
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if (!entry->listener->signal(entry->listener, signal, level, thread,
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ike_sa, format, args_copy))
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2007-02-28 14:04:36 +00:00
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{
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iterator->remove(iterator);
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2007-11-15 18:35:54 +00:00
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if (entry->blocker)
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{
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entry->blocker = FALSE;
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pthread_cond_signal(&entry->cond);
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}
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else
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{
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free(entry);
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}
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2007-02-28 14:04:36 +00:00
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}
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2006-10-18 11:46:13 +00:00
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va_end(args_copy);
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2006-09-27 14:14:44 +00:00
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}
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iterator->destroy(iterator);
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2006-10-18 11:46:13 +00:00
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pthread_mutex_unlock(&this->mutex);
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}
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/**
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* Implementation of bus_t.signal.
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*/
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static void signal_(private_bus_t *this, signal_t signal, 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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vsignal(this, signal, level, format, args);
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2006-09-27 14:14:44 +00:00
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va_end(args);
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}
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/**
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* Implementation of bus_t.destroy.
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*/
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static void destroy(private_bus_t *this)
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{
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2007-11-15 18:35:54 +00:00
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this->listeners->destroy_function(this->listeners, free);
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2006-09-27 14:14:44 +00:00
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free(this);
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}
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/*
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* Described in header.
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*/
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bus_t *bus_create()
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{
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private_bus_t *this = malloc_thing(private_bus_t);
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this->public.add_listener = (void(*)(bus_t*,bus_listener_t*))add_listener;
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2007-05-23 09:08:13 +00:00
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this->public.remove_listener = (void(*)(bus_t*,bus_listener_t*))remove_listener;
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2007-11-15 18:35:54 +00:00
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this->public.listen = (void(*)(bus_t*, bus_listener_t *listener, job_t *job))listen_;
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2006-09-27 14:14:44 +00:00
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this->public.set_sa = (void(*)(bus_t*,ike_sa_t*))set_sa;
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this->public.signal = (void(*)(bus_t*,signal_t,level_t,char*,...))signal_;
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2006-10-18 11:46:13 +00:00
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this->public.vsignal = (void(*)(bus_t*,signal_t,level_t,char*,va_list))vsignal;
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2006-09-27 14:14:44 +00:00
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this->public.destroy = (void(*)(bus_t*)) destroy;
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this->listeners = linked_list_create();
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2006-10-18 11:46:13 +00:00
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pthread_mutex_init(&this->mutex, NULL);
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2006-09-27 14:14:44 +00:00
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pthread_key_create(&this->thread_id, NULL);
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pthread_key_create(&this->thread_sa, NULL);
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2007-11-15 18:35:54 +00:00
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return &this->public;
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2006-09-27 14:14:44 +00:00
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}
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2007-11-15 18:35:54 +00:00
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