From b50f56f326d1e58d13f4287280799236fd239a05 Mon Sep 17 00:00:00 2001 From: Tobias Brunner Date: Fri, 13 Jul 2012 13:32:27 +0200 Subject: Added class to relay IPsec events (like expiration) to listeners Currently, only expiration of IPsec SAs is supported. Later other events for e.g. acquires or changed NAT endpoints could be added. --- src/libipsec/ipsec_event_relay.c | 193 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 193 insertions(+) create mode 100644 src/libipsec/ipsec_event_relay.c (limited to 'src/libipsec/ipsec_event_relay.c') diff --git a/src/libipsec/ipsec_event_relay.c b/src/libipsec/ipsec_event_relay.c new file mode 100644 index 000000000..34222258c --- /dev/null +++ b/src/libipsec/ipsec_event_relay.c @@ -0,0 +1,193 @@ +/* + * Copyright (C) 2012 Tobias Brunner + * Copyright (C) 2012 Giuliano Grassi + * Copyright (C) 2012 Ralf Sager + * Hochschule fuer Technik Rapperswil + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See . + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +#include "ipsec_event_relay.h" + +#include +#include +#include +#include +#include +#include + +typedef struct private_ipsec_event_relay_t private_ipsec_event_relay_t; + +/** + * Private additions to ipsec_event_relay_t. + */ +struct private_ipsec_event_relay_t { + + /** + * Public members + */ + ipsec_event_relay_t public; + + /** + * Registered listeners + */ + linked_list_t *listeners; + + /** + * Lock to safely access the list of listeners + */ + rwlock_t *lock; + + /** + * Blocking queue for events + */ + blocking_queue_t *queue; +}; + +/** + * Helper struct used to manage events in a queue + */ +typedef struct { + + /** + * Type of the event + */ + enum { + IPSEC_EVENT_EXPIRE, + } type; + + /** + * Reqid of the SA, if any + */ + u_int32_t reqid; + + /** + * SPI of the SA, if any + */ + u_int32_t spi; + + /** + * Additional data for specific event types + */ + union { + + struct { + /** Protocol of the SA */ + u_int8_t protocol; + /** TRUE in case of a hard expire */ + bool hard; + } expire; + + } data; + +} ipsec_event_t; + +/** + * Dequeue events and relay them to listeners + */ +static job_requeue_t handle_events(private_ipsec_event_relay_t *this) +{ + enumerator_t *enumerator; + ipsec_event_listener_t *current; + ipsec_event_t *event; + + event = this->queue->dequeue(this->queue); + + this->lock->read_lock(this->lock); + enumerator = this->listeners->create_enumerator(this->listeners); + while (enumerator->enumerate(enumerator, (void**)¤t)) + { + switch (event->type) + { + case IPSEC_EVENT_EXPIRE: + if (current->expire) + { + current->expire(event->reqid, event->data.expire.protocol, + event->spi, event->data.expire.hard); + } + break; + } + } + enumerator->destroy(enumerator); + this->lock->unlock(this->lock); + return JOB_REQUEUE_DIRECT; +} + +METHOD(ipsec_event_relay_t, expire, void, + private_ipsec_event_relay_t *this, u_int32_t reqid, u_int8_t protocol, + u_int32_t spi, bool hard) +{ + ipsec_event_t *event; + + INIT(event, + .type = IPSEC_EVENT_EXPIRE, + .reqid = reqid, + .spi = spi, + .data = { + .expire = { + .protocol = protocol, + .hard = hard, + }, + }, + ); + this->queue->enqueue(this->queue, event); +} + +METHOD(ipsec_event_relay_t, register_listener, void, + private_ipsec_event_relay_t *this, ipsec_event_listener_t *listener) +{ + this->lock->write_lock(this->lock); + this->listeners->insert_last(this->listeners, listener); + this->lock->unlock(this->lock); +} + +METHOD(ipsec_event_relay_t, unregister_listener, void, + private_ipsec_event_relay_t *this, ipsec_event_listener_t *listener) +{ + this->lock->write_lock(this->lock); + this->listeners->remove(this->listeners, listener, NULL); + this->lock->unlock(this->lock); +} + +METHOD(ipsec_event_relay_t, destroy, void, + private_ipsec_event_relay_t *this) +{ + this->queue->destroy_function(this->queue, free); + this->listeners->destroy(this->listeners); + this->lock->destroy(this->lock); + free(this); +} + +/** + * Described in header. + */ +ipsec_event_relay_t *ipsec_event_relay_create() +{ + private_ipsec_event_relay_t *this; + + INIT(this, + .public = { + .expire = _expire, + .register_listener = _register_listener, + .unregister_listener = _unregister_listener, + .destroy = _destroy, + }, + .listeners = linked_list_create(), + .lock = rwlock_create(RWLOCK_TYPE_DEFAULT), + .queue = blocking_queue_create(), + ); + + lib->processor->queue_job(lib->processor, + (job_t*)callback_job_create((callback_job_cb_t)handle_events, this, + NULL, (callback_job_cancel_t)return_false)); + + return &this->public; +} -- cgit v1.2.3