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component.c
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component.c
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/*
* This file is part of the Nice GLib ICE library.
*
* (C) 2006-2009 Collabora Ltd.
* Contact: Youness Alaoui
* (C) 2006-2009 Nokia Corporation. All rights reserved.
* Contact: Kai Vehmanen
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Nice GLib ICE library.
*
* The Initial Developers of the Original Code are Collabora Ltd and Nokia
* Corporation. All Rights Reserved.
*
* Contributors:
* Dafydd Harries, Collabora Ltd.
* Youness Alaoui, Collabora Ltd.
* Kai Vehmanen, Nokia
*
* Alternatively, the contents of this file may be used under the terms of the
* the GNU Lesser General Public License Version 2.1 (the "LGPL"), in which
* case the provisions of LGPL are applicable instead of those above. If you
* wish to allow use of your version of this file only under the terms of the
* LGPL and not to allow others to use your version of this file under the
* MPL, indicate your decision by deleting the provisions above and replace
* them with the notice and other provisions required by the LGPL. If you do
* not delete the provisions above, a recipient may use your version of this
* file under either the MPL or the LGPL.
*/
/*
* Porting to C library using libevent.
* Jackie Dinh - 2016
*/
#include "cice/agent.h"
#include "cice/component.h"
#include "cice/network.h"
void
incoming_check_free(incoming_check_head_t *icheck)
{
/* FIXME: incoming_check_free */
/*free (icheck->username);
g_slice_free (IncomingCheck, icheck);*/
}
component_t *
component_new (agent_t *agent, stream_t *stream, uint32_t id)
{
component_t *component;
ICE_DEBUG("created component, cid=%u", id);
component = ICE_MALLOC(component_t);
if (!component) return 0;
ICE_MEMZERO(component,component_t);
component->id = id;
component->state = ICE_COMPONENT_STATE_DISCONNECTED;
component->restart_candidate = 0;
component->tcp = 0;
component->agent = agent;
component->stream = stream;
TAILQ_INIT(&component->local_candidates);
TAILQ_INIT(&component->remote_candidates);
TAILQ_INIT(&component->incoming_checks);
ice_agent_init_stun_agent(agent, &component->stun_agent);
return component;
}
void
component_set_io_callback (component_t *component,
agent_recv_func cb, void *user_data) {
if ( component == 0 )
return;
component->io_callback = cb;
component->io_data = user_data;
return;
}
void
component_attach_socket (component_t *component, socket_t *nicesock)
{
if (component == NULL || nicesock == NULL)
return;
/* FIXME Create and attach a source */
//nicesock->component = component;
return;
}
candidate_t *
component_find_remote_candidate(const component_t *component,
const address_t *addr, IceCandidateTransport transport)
{
candidate_t *candidate = NULL;
TAILQ_FOREACH(candidate,&component->remote_candidates,list) {
if ( address_equal(&candidate->addr,addr) &&
candidate->transport == transport ) {
return candidate;
}
}
return NULL;
}
static void
component_clear_selected_pair (component_t *component)
{
/* FIXME: clear timeout for selected pair */
/*if (component->selected_pair.keepalive.tick_source != NULL) {
g_source_destroy (component->selected_pair.keepalive.tick_source);
g_source_unref (component->selected_pair.keepalive.tick_source);
component->selected_pair.keepalive.tick_source = NULL;
}*/
memset(&component->selected_pair, 0, sizeof(candidate_pair_t));
}
/*
* Changes the selected pair for the component to 'pair'. Does not
* emit the "selected-pair-changed" signal.
*/
void
component_update_selected_pair (component_t *component, const candidate_pair_t *pair)
{
if ( component == NULL || pair == NULL )
return;
ICE_DEBUG("setting SELECTED PAIR for component, "
"cid=%u, lfoundation=%s, rfoundation=%s ,prio:%lu",
component->id, pair->local->foundation,
pair->remote->foundation, pair->priority);
/* FIXME: clean socket resources */
/*if (component->selected_pair.local &&
component->selected_pair.local == component->turn_candidate) {
refresh_prune_candidate(component->agent, component->turn_candidate);
discovery_prune_socket(component->agent, component->turn_candidate->sockptr);
conn_check_prune_socket (component->agent, component->stream, component,
component->turn_candidate->sockptr);
component_detach_socket (component, component->turn_candidate->sockptr);
candidate_free (component->turn_candidate);
component->turn_candidate = NULL;
}*/
component_clear_selected_pair(component);
ICE_DEBUG("set selected pair, local=%p, remote=%p", pair->local, pair->remote);
component->selected_pair.local = pair->local;
component->selected_pair.remote = pair->remote;
component->selected_pair.priority = pair->priority;
return;
}
/*
* Finds a candidate pair that has matching foundation ids.
*
* @return TRUE if pair found, pointer to pair stored at 'pair'
*/
int
component_find_pair(component_t *cmp, agent_t *agent, const char *lfoundation,
const char *rfoundation, candidate_pair_t *pair)
{
candidate_t *candidate = NULL;
candidate_pair_t result = { 0, };
TAILQ_FOREACH(candidate,&cmp->local_candidates,list) {
if (strncmp(candidate->foundation, lfoundation, ICE_CANDIDATE_MAX_FOUNDATION) == 0) {
result.local = candidate;
break;
}
}
TAILQ_FOREACH(candidate,&cmp->remote_candidates,list) {
if (strncmp (candidate->foundation, rfoundation, ICE_CANDIDATE_MAX_FOUNDATION) == 0) {
result.remote = candidate;
break;
}
}
if (result.local && result.remote) {
result.priority = agent_candidate_pair_priority(agent, result.local, result.remote);
if (pair)
*pair = result;
return ICE_OK;
}
return ICE_ERR;
}
candidate_t *
component_set_selected_remote_candidate(agent_t *agent,
component_t *component, candidate_t *candidate)
{
candidate_t *local = NULL;
candidate_t *remote = NULL;
uint64_t priority = 0;
candidate_t *tmp = NULL;
if (candidate == NULL)
return NULL;
TAILQ_FOREACH(tmp,&component->local_candidates,list) {
uint64_t tmp_prio = 0;
if (tmp->transport != candidate->transport ||
tmp->addr.s.addr.sa_family != candidate->addr.s.addr.sa_family ||
tmp->type != ICE_CANDIDATE_TYPE_HOST)
continue;
tmp_prio = agent_candidate_pair_priority (agent, tmp, candidate);
ICE_DEBUG("computing priority, temp=%lu, prio=%lu",tmp_prio,priority);
if (tmp_prio > priority) {
priority = tmp_prio;
local = tmp;
}
}
if (local == NULL)
return NULL;
remote = component_find_remote_candidate(component, &candidate->addr,
candidate->transport);
ICE_DEBUG("got remote, remote=%p",remote);
if (!remote) {
remote = candidate_copy(candidate);
TAILQ_INSERT_HEAD(&component->remote_candidates, remote, list);
agent_signal_new_remote_candidate(agent, remote);
}
component_clear_selected_pair (component);
ICE_DEBUG("set selected pair, prio=%lu",priority);
component->selected_pair.local = local;
component->selected_pair.remote = remote;
component->selected_pair.priority = priority;
return local;
}
void
ice_component_close(component_t *c) {
agent_t *agent = (agent_t*)c->agent;
candidate_t *candidate = NULL;
socket_t *sock = 0;
c->state = ICE_COMPONENT_STATE_DISCONNECTED;
// free local candidates
while (!TAILQ_EMPTY(&c->local_candidates)) {
candidate = TAILQ_FIRST(&c->local_candidates);
TAILQ_REMOVE(&c->local_candidates, candidate, list);
candidate_free(candidate);
}
while (!TAILQ_EMPTY(&c->remote_candidates)) {
candidate = TAILQ_FIRST(&c->remote_candidates);
TAILQ_REMOVE(&c->remote_candidates, candidate, list);
candidate_free(candidate);
}
sock = (socket_t*)c->sock;
ICE_DEBUG("component close, fd=%d, sid=%u, cid=%u", sock->fd, c->stream->id, c->id);
sock->agent = 0;
sock->stream = 0;
sock->component = 0;
agent->base->destroy_socket(agent->base,sock);
return;
}