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agent.c
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agent.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 <fcntl.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include "cice/agent.h"
#include "cice/interfaces.h"
#include "cice/discovery.h"
#include "cice/candidate.h"
#include "cice/network.h"
#include "cice/stun/stunagent.h"
static const char *
_transport_to_string (IceCandidateTransport type) {
switch(type) {
case ICE_CANDIDATE_TRANSPORT_UDP:
return "UDP";
case ICE_CANDIDATE_TRANSPORT_TCP_ACTIVE:
return "TCP-ACT";
case ICE_CANDIDATE_TRANSPORT_TCP_PASSIVE:
return "TCP-PASS";
case ICE_CANDIDATE_TRANSPORT_TCP_SO:
return "TCP-SO";
default:
return "???";
}
}
stream_t *
agent_find_stream(agent_t *agent, uint32_t stream_id)
{
stream_t *stream;
if (agent == NULL)
return NULL;
TAILQ_FOREACH(stream,&agent->streams,list) {
//ICE_DEBUG("stream search, id=%u,stream_id=%u",
// stream->id,stream_id);
if (stream->id == stream_id )
return stream;
}
return NULL;
}
int
agent_find_component(agent_t *agent, uint32_t stream_id, uint32_t component_id,
stream_t **stream, component_t **component)
{
stream_t *s;
component_t *c;
s = agent_find_stream (agent, stream_id);
if (s == NULL)
return ICE_NULLPTR;
c = stream_find_component_by_id (s, component_id);
if (c == NULL)
return ICE_NULLPTR;
if (stream)
*stream = s;
if (component)
*component = c;
return ICE_OK;
}
agent_t*
ice_agent_new(event_ctx_t *base, IceCompatibility compat, int control_mode) {
agent_t *agent = NULL;
agent = (agent_t*)malloc(sizeof(agent_t));
if (agent == NULL) {
ICE_ERROR("malloc error, size=%u", sizeof(agent_t));
return NULL;
}
memset(agent,0,sizeof(agent_t));
/* initialize agent */
agent->base = base;
agent->compatibility = compat;
agent->controlling_mode = control_mode; /* 0 - controlled, 1 - controlling */
agent->full_mode = 0;
agent->next_stream_id = 1;
agent->use_ice_udp = 1;
agent->next_candidate_id =1;
agent->max_conn_checks = 100;
agent->timer_ta = ICE_AGENT_TIMER_TA_DEFAULT;
if (base != NULL) {
agent->base = base;
base->agent = agent;
} else {
ICE_ERROR("no event base");
free(agent);
return NULL;
}
/*FIXME: get from argument*/
agent->reliable = 0;
/* init list of objects */
TAILQ_INIT(&agent->local_addresses);
TAILQ_INIT(&agent->streams);
TAILQ_INIT(&agent->discovery_list);
TAILQ_INIT(&agent->refresh_list);
return agent;
}
void
ice_agent_free(agent_t *agent) {
stream_t *s = NULL;
discovery_free(agent);
refresh_free(agent);
conn_check_free(agent);
while (!TAILQ_EMPTY(&agent->streams)) {
s = TAILQ_FIRST(&agent->streams);
TAILQ_REMOVE(&agent->streams, s, list);
ice_stream_close(s);
}
if (agent->keepalive_timer_ev) {
//event_del(agent->keepalive_timer_ev);
destroy_event_info(agent->base, agent->keepalive_timer_ev);
agent->keepalive_timer_ev = 0;
}
return;
}
int
ice_agent_add_stream(agent_t *agent, uint32_t n_components) {
stream_t *stream = NULL;
stream = stream_new(agent,n_components);
if ( stream == 0 ) {
ICE_ERROR("failed to create new stream");
return 0;
}
TAILQ_INSERT_HEAD(&agent->streams,stream,list);
/*. init components of stream, possibly create pseudo_tcp */
stream->id = agent->next_stream_id++;
ICE_INFO("allocating stream, agent=%p, sid=%u(%p),n=%u",
agent, stream->id, stream, n_components);
if (agent->reliable) {
/* FIXME: create reliable stream
* or create pseudo_tcp for each component */
}
/* FIXME: use number generator */
stream_initialize_credentials(stream/*, agent->rng*/);
return stream->id;
}
int
ice_agent_set_stream_name(agent_t *agent, uint32_t stream_id, const char *name) {
/* TODO: verify that stream name is valid: audio, video,
* text, application, image, message etc, and set stream name */
return 0;
}
int
ice_agent_attach_recv (agent_t *agent, uint32_t stream_id, uint32_t component_id,
agent_recv_func func, void *data) {
stream_t *stream;
component_t *component;
int ret = 0;
if (agent == 0) {
ICE_ERROR("agent is null, sid=%u, cid=%u", stream_id, component_id);
return ICE_ERR;
}
ret = agent_find_component(agent, stream_id, component_id, &stream, &component);
if (ret != ICE_OK) {
ICE_ERROR("component not found, ret=%d, sid=%u, cid=%u",
ret, stream_id, component_id);
return ICE_ERR;
}
/* set io callback 'func */
ICE_INFO("set io callbacks, sid=%u, cid=%u",stream_id,component_id);
component->io_callback = func;
component->io_data = data;
/* Init pseudo_tcp if needed */
if (agent->reliable && func) {
/* TODO: init pseudo_tcp */
}
return 0;
}
void agent_signal_gathering_done(agent_t *agent)
{
stream_t *stream = NULL;
if (agent == NULL)
return;
TAILQ_FOREACH(stream,&agent->streams,list) {
if (stream->gathering) {
stream->gathering = 0;
if ( agent->candidate_gathering_done_cb ) {
agent->candidate_gathering_done_cb(agent,
stream->id,agent->candidate_gathering_done_data);
}
}
}
return;
}
void
agent_gathering_done (agent_t *agent) {
stream_t *stream = NULL;
if (agent == NULL)
return;
TAILQ_FOREACH(stream,&agent->streams,list) {
component_t *component = NULL;
TAILQ_FOREACH(component,&stream->components,list) {
candidate_t *local_candidate = NULL;
TAILQ_FOREACH(local_candidate,&component->local_candidates,list) {
candidate_t *remote_candidate = NULL;
{
char tmpbuf[INET6_ADDRSTRLEN];
address_to_string(&local_candidate->addr, tmpbuf);
ICE_INFO("Agent %p: gathered %s local candidate : [%s]:%u"
" for s%d/c%d. U/P '%s'/'%s'", agent,
_transport_to_string (local_candidate->transport),
tmpbuf, address_get_port (&local_candidate->addr),
local_candidate->stream_id, local_candidate->component_id,
local_candidate->username, local_candidate->password);
}
TAILQ_FOREACH(remote_candidate,&component->remote_candidates,list) {
candidate_check_pair_t *p = NULL;
int found_pair = 0;
TAILQ_FOREACH(p,&stream->connchecks,list) {
if (p->local == local_candidate && p->remote == remote_candidate) {
found_pair = 1;
break;
}
}
if (!found_pair) {
ICE_ERROR("add candidate pair, found_pair=%u, foundation=%s(%p)",
found_pair,remote_candidate->foundation, remote_candidate);
conn_check_add_for_candidate_pair(agent, stream->id, component,
local_candidate, remote_candidate);
}
}
}
}
}
/* FIXME: discovery timer */
//if (agent->discovery_timer_source == NULL)
agent_signal_gathering_done(agent);
return;
}
int
ice_agent_gather_candidates (agent_t *agent, uint32_t stream_id) {
stream_t *stream;
address_head_t local_addresses;
address_head_t *head = NULL;
address_t *addr = NULL;
uint32_t cid;
int get_local_address = 0;
int ret = ICE_OK;
TAILQ_INIT(&local_addresses);
if ( agent == NULL )
return ICE_NULLPTR;
if ( stream_id <= 0 )
return ICE_ERR;
stream = agent_find_stream(agent,stream_id);
if ( stream == NULL )
return ICE_ERR;
/* Ignore if gathering candidates is started */
if ( stream->gathering_started )
return ICE_OK;
ICE_DEBUG("starting candidate gathering, agent=%p, mode=%s",
agent, agent->full_mode ? "ICE-FULL" : "ICE-LITE");
/* If no local addresses in streams, then generates the list */
if (TAILQ_EMPTY(&agent->local_addresses)) {
ICE_INFO("no local addresses gathered, agent=%p", agent);
ice_interfaces_get_local_ips(&local_addresses,0);
head = &local_addresses;
get_local_address = 1;
} else {
head = &agent->local_addresses;
}
while (!TAILQ_EMPTY(head)) {
candidate_t *host_candidate;
addr = TAILQ_FIRST(head);
TAILQ_REMOVE(head, addr, list);
print_address(addr);
for (cid = 1; cid <= stream->n_components; cid++) {
int add_type;
component_t *component = stream_find_component_by_id (stream, cid);
if (component == NULL ) {
ICE_ERROR("component not found, cid=%u",cid);
continue;
}
for (add_type=ADD_HOST_MIN; add_type<=ADD_HOST_MAX; add_type++) {
HostCandidateResult res = HOST_CANDIDATE_CANT_CREATE_SOCKET;
IceCandidateTransport transport;
uint16_t current_port;
uint16_t start_port;
/* TODO: currently support udp, need tcp */
if ((!agent->use_ice_udp && add_type == ADD_HOST_UDP) ||
(!agent->use_ice_tcp && add_type != ADD_HOST_UDP))
continue;
switch (add_type) {
default:
case ADD_HOST_UDP:
transport = ICE_CANDIDATE_TRANSPORT_UDP;
break;
case ADD_HOST_TCP_ACTIVE:
transport = ICE_CANDIDATE_TRANSPORT_TCP_ACTIVE;
break;
case ADD_HOST_TCP_PASSIVE:
transport = ICE_CANDIDATE_TRANSPORT_TCP_PASSIVE;
break;
}
start_port = component->min_port;
if(component->min_port != 0) {
//start_port = nice_rng_generate_int(agent->rng,
// component->min_port, component->max_port+1);
/*FIXME: impl rng algorithm */
start_port = 10000;
}
current_port = start_port;
/* Generate the list of host candidate */
host_candidate = NULL;
while (res == HOST_CANDIDATE_CANT_CREATE_SOCKET) {
ICE_DEBUG("trying to create host candidate, agent=%p, port=%u", agent, current_port);
address_set_port (addr, current_port);
res = discovery_add_local_host_candidate(agent, stream->id, cid,
addr, transport, &host_candidate);
if (current_port > 0)
current_port++;
if (current_port > component->max_port)
current_port = component->min_port;
if (current_port == 0 || current_port == start_port)
break;
}
if (res == HOST_CANDIDATE_REDUNDANT) {
ICE_DEBUG("ignoring local redundant candidate, agent=%p", agent);
continue;
} else if (res == HOST_CANDIDATE_FAILED) {
ICE_DEBUG("could not retrieive component, agent=%p, sid=%u, cid=%u",
agent,stream->id,cid);
ret = ICE_ERR;
goto error;
} else if (res == HOST_CANDIDATE_CANT_CREATE_SOCKET) {
{// print debug info
char ip[ICE_ADDRESS_STRING_LEN];
address_to_string (addr, ip);
ICE_ERROR("unable to add local host candidate, agent=%p, ip=%s, sid=%u, cid=%u",
agent, ip, stream->id, component->id);
}
ret = ICE_ERR;
goto error;
}
address_set_port(addr, 0);
if (agent->reliable) {
/* TODO: set writable callback for socket */
}
/* Discovery reflecxive candidates via stun protocol */
if (agent->full_mode && agent->stun_server_ip &&
transport == ICE_CANDIDATE_TRANSPORT_UDP) {
/* TODO: Add server-reflexive support for TCP candidates */
//priv_add_new_candidate_discovery_stun();
}
//5. Discovery relayed candidates via turn protocol.
if (agent->full_mode && component &&
transport != ICE_CANDIDATE_TRANSPORT_TCP_PASSIVE) {
/* TODO: Add support for relay candidates */
//priv_add_new_candidate_discovery_turn();
}
}
}
if (get_local_address) address_free(addr);
}
stream->gathering = 1;
stream->gathering_started = 1;
for (cid = 1; cid <= stream->n_components; cid++) {
component_t *component = stream_find_component_by_id(stream, cid);
candidate_t *c = NULL;
TAILQ_FOREACH(c,&component->local_candidates,list) {
//agent_signal_new_candidate
/* TODO: call 'new candidate' callback */
print_address(&c->addr);
}
}
ICE_DEBUG("starting discovery process, discovery_unsched_items=%u",
agent->discovery_unsched_items);
if (agent->discovery_unsched_items == 0) {
/* Calls "gathering done" callback if needed */
agent_gathering_done(agent);
} else if (agent->discovery_unsched_items) {
/* TODO: Setup timers and initiate the candidate discovery process */
//discovery_schedule(agent);
}
//9. Handling error
error:
if (ret != ICE_OK ) {
for (cid = 1; cid <= stream->n_components; cid++) {
component_t *component = stream_find_component_by_id(stream, cid);
candidate_t *c = NULL;
while (!TAILQ_EMPTY(&component->local_candidates)) {
c = TAILQ_FIRST(&component->local_candidates);
TAILQ_REMOVE(&component->local_candidates, c, list);
//TODO: clean c
}
}
/* TODO: stop discovery process */
//discovery_prune_stream(agent, stream_id);
}
return ret;
}
void
ice_set_candidate_gathering_done_cb(agent_t *agent, candidate_gathering_done_func cb, void *data) {
if (agent==NULL)
return;
agent->candidate_gathering_done_cb = cb;
agent->candidate_gathering_done_data = data;
return;
}
void
ice_set_component_state_changed_cb(agent_t *agent, component_state_changed_func cb, void *data) {
if (agent==NULL)
return;
agent->component_state_changed_cb = cb;
agent->component_state_changed_data = data;
return;
}
void
ice_set_new_selected_pair_cb(agent_t *agent, new_selected_pair_func cb, void *data) {
if (agent==NULL)
return;
agent->new_selected_pair_cb = cb;
agent->new_selected_pair_data = data;
return;
}
void
ice_set_new_remote_candidate_cb(agent_t *agent, new_remote_candidate_func cb, void *data) {
if (agent==NULL)
return;
agent->new_remote_candidate_cb = cb;
agent->new_remote_candidate_data = data;
return;
}
void
ice_agent_init_stun_agent (agent_t *agent, struct stun_agent_t *stun_agent) {
if (agent->compatibility == ICE_COMPATIBILITY_GOOGLE) {
stun_agent_init (stun_agent, STUN_ALL_KNOWN_ATTRIBUTES,
STUN_COMPATIBILITY_RFC3489,
STUN_AGENT_USAGE_SHORT_TERM_CREDENTIALS |
STUN_AGENT_USAGE_IGNORE_CREDENTIALS);
} else if (agent->compatibility == ICE_COMPATIBILITY_MSN) {
stun_agent_init (stun_agent, STUN_ALL_KNOWN_ATTRIBUTES,
STUN_COMPATIBILITY_RFC3489,
STUN_AGENT_USAGE_SHORT_TERM_CREDENTIALS |
STUN_AGENT_USAGE_FORCE_VALIDATER);
} else if (agent->compatibility == ICE_COMPATIBILITY_WLM2009) {
stun_agent_init (stun_agent, STUN_ALL_KNOWN_ATTRIBUTES,
STUN_COMPATIBILITY_WLM2009,
STUN_AGENT_USAGE_SHORT_TERM_CREDENTIALS |
STUN_AGENT_USAGE_USE_FINGERPRINT);
} else if (agent->compatibility == ICE_COMPATIBILITY_OC2007) {
stun_agent_init (stun_agent, STUN_ALL_KNOWN_ATTRIBUTES,
STUN_COMPATIBILITY_RFC3489,
STUN_AGENT_USAGE_SHORT_TERM_CREDENTIALS |
STUN_AGENT_USAGE_FORCE_VALIDATER |
STUN_AGENT_USAGE_NO_ALIGNED_ATTRIBUTES);
} else if (agent->compatibility == ICE_COMPATIBILITY_OC2007R2) {
stun_agent_init (stun_agent, STUN_ALL_KNOWN_ATTRIBUTES,
STUN_COMPATIBILITY_WLM2009,
STUN_AGENT_USAGE_SHORT_TERM_CREDENTIALS |
STUN_AGENT_USAGE_USE_FINGERPRINT |
STUN_AGENT_USAGE_NO_ALIGNED_ATTRIBUTES);
} else {
stun_agent_init (stun_agent, STUN_ALL_KNOWN_ATTRIBUTES,
STUN_COMPATIBILITY_RFC5389,
STUN_AGENT_USAGE_SHORT_TERM_CREDENTIALS |
STUN_AGENT_USAGE_USE_FINGERPRINT);
}
stun_agent_set_software(stun_agent, agent->software_attribute);
return;
}
uint64_t
agent_candidate_pair_priority(agent_t *agent, candidate_t *local, candidate_t *remote) {
uint64_t prio = 0;
if (agent->controlling_mode)
prio = candidate_pair_priority(local->priority, remote->priority);
else
prio = candidate_pair_priority(remote->priority, local->priority);
return prio;
}
const char*
component_state_to_string(IceComponentState state) {
switch (state)
{
case ICE_COMPONENT_STATE_DISCONNECTED:
return "disconnected";
case ICE_COMPONENT_STATE_GATHERING:
return "gathering";
case ICE_COMPONENT_STATE_CONNECTING:
return "connecting";
case ICE_COMPONENT_STATE_CONNECTED:
return "connected";
case ICE_COMPONENT_STATE_READY:
return "ready";
case ICE_COMPONENT_STATE_FAILED:
return "failed";
case ICE_COMPONENT_STATE_LAST:
default:
return "invalid";
}
return "invalid";
}
void agent_signal_component_state_change(agent_t *agent,
uint32_t stream_id, uint32_t component_id, IceComponentState state) {
component_t *component;
stream_t *stream;
//ICE_DEBUG("component state change, newstate=%u", state);
if (agent == NULL)
return;
if (agent_find_component(agent, stream_id, component_id,
&stream, &component) != ICE_OK)
return;
ICE_DEBUG("component state change, oldstate=%u,newstate=%u",
component->state,state);
if (component->state != state && state < ICE_COMPONENT_STATE_LAST) {
ICE_DEBUG("STATE-CHANGE , sid=%u, cid=%u, old=%s, new=%s",
stream_id, component_id,
component_state_to_string(component->state),
component_state_to_string (state));
component->state = state;
/* FIXME: reliable agent check */
/*if (agent->reliable)
process_queued_tcp_packets (agent, stream, component);*/
if ( agent->component_state_changed_cb )
agent->component_state_changed_cb(agent,stream_id,component_id,
state,agent->component_state_changed_data);
}
return;
}
int
ice_agent_get_selected_pair (agent_t *agent, uint32_t stream_id,
uint32_t component_id, candidate_t **local, candidate_t **remote)
{
component_t *component;
stream_t *stream;
int ret = ICE_ERR;
ICE_DEBUG("getting selected pair, sid=%u, cid=%u, local=%p, remote=%p",
stream_id, component_id, local, remote);
if (stream_id < 1 || component_id < 1 || local == NULL || remote == NULL ) {
ICE_DEBUG("error in getting selected pair, sid=%u, cid=%u, local=%p, remote=%p",
stream_id, component_id, local, remote);
return ret;
}
/* step: check that params specify an existing pair */
ret = agent_find_component (agent, stream_id, component_id, &stream, &component);
if (ret != ICE_OK) {
ICE_DEBUG("pair selected not found, sid=%u, cid=%u, ret=%d",stream_id,component_id,ret);
goto done;
}
ICE_DEBUG("error in getting selected pair, c=%p, local=%p, remote=%p",
component,
component->selected_pair.local,
component->selected_pair.remote);
if (component->selected_pair.local && component->selected_pair.remote) {
*local = component->selected_pair.local;
*remote = component->selected_pair.remote;
ICE_DEBUG("get selected pair, local=%p, remote=%p", *local, *remote);
ret = ICE_OK;
}
ICE_DEBUG("error in getting selected pair, sid=%u, cid=%u, local=%p, remote=%p",
stream_id, component_id, local, remote);
done:
return ret;
}
int
ice_agent_get_local_credentials(agent_t *agent, uint32_t stream_id,
char **ufrag, char **pwd) {
stream_t *stream;
int ret = ICE_OK;
if ( agent == NULL || stream_id < 1 )
return ICE_ERR;
stream = agent_find_stream (agent, stream_id);
if (stream == NULL) {
goto done;
}
if (!ufrag || !pwd) {
goto done;
}
*ufrag = strdup (stream->local_ufrag);
*pwd = strdup (stream->local_password);
ret = ICE_OK;
done:
return ret;
}
candidate_head_t*
ice_agent_get_local_candidates(agent_t *agent, uint32_t stream_id, uint32_t component_id)
{
component_t *component;
candidate_head_t *ret = NULL;
candidate_t *c = NULL;
if (agent == NULL || stream_id < 1 || component_id < 1) {
return NULL;
}
if (agent_find_component (agent, stream_id, component_id, NULL, &component) != ICE_OK) {
goto done;
}
ret = candidate_head_new();
if ( ret == NULL )
return NULL;
TAILQ_FOREACH(c,&component->local_candidates,list) {
candidate_t *copy = candidate_copy(c);
if ( copy != NULL )
TAILQ_INSERT_HEAD(ret,copy,list);
}
done:
return ret;
}
int
ice_agent_set_remote_credentials(agent_t *agent, uint32_t stream_id,
const char *ufrag, const char *pwd)
{
stream_t *stream;
int ret = ICE_ERR;
if (agent == NULL || stream_id < 1)
return ICE_ERR;
stream = agent_find_stream(agent, stream_id);
if (stream && ufrag && pwd) {
strncpy(stream->remote_ufrag, ufrag, ICE_STREAM_MAX_UFRAG);
strncpy(stream->remote_password, pwd, ICE_STREAM_MAX_PWD);
ret = ICE_OK;
}
return ret;
}
static int
priv_add_remote_candidate( agent_t *agent, uint32_t stream_id,
uint32_t component_id, IceCandidateType type,
const address_t *addr, const address_t *base_addr,
IceCandidateTransport transport, uint32_t priority,
const char *username, const char *password,
const char *foundation) {
component_t *component;
candidate_t *candidate;
if (agent_find_component (agent, stream_id, component_id, NULL, &component) != ICE_OK)
return ICE_ERR;
candidate = component_find_remote_candidate(component, addr, transport);
if (candidate && candidate->type == ICE_CANDIDATE_TYPE_PEER_REFLEXIVE &&
candidate->priority == priority ) {
ICE_ERROR("updating existing peer-rfx remote candidate, type=%u, foundation=%s(%p)",
type, candidate->foundation, candidate);
candidate->type = type;
}
if (candidate && candidate->type == type) {
{
char tmpbuf[INET6_ADDRSTRLEN] = {0};
address_to_string (addr, tmpbuf);
ICE_ERROR("remote candidate exists, addr=%s:%u, sid=%u, cid=%u,"
" username=%s, pass=%s prio=%u, foundation=%s", tmpbuf,
address_get_port (addr), stream_id, component_id,
username, password, priority, foundation);
}
/* an existing candidate, update the attributes */
candidate->type = type;
if (base_addr)
candidate->base_addr = *base_addr;
candidate->priority = priority;
if (foundation) {
ICE_ERROR("new foundation, old=%s, new=%s(%p)", candidate->foundation, foundation, candidate);
strncpy(candidate->foundation, foundation, ICE_CANDIDATE_MAX_FOUNDATION);
}
if (username) {
free(candidate->username);
candidate->username = strdup(username);
}
if (password) {
free(candidate->password);
candidate->password = strdup(password);
}
}
else {
/* add a new candidate */
if (type == ICE_CANDIDATE_TYPE_PEER_REFLEXIVE) {
ICE_DEBUG("ignoring peer-reflexive candidate");
return ICE_ERR;
}
candidate = candidate_new(type);
TAILQ_INSERT_HEAD(&component->remote_candidates,candidate,list);
candidate->stream_id = stream_id;
candidate->component_id = component_id;
candidate->type = type;
if (addr)
candidate->addr = *addr;
{
char tmpbuf[INET6_ADDRSTRLEN] = {0};
if (addr) address_to_string (addr, tmpbuf);
ICE_DEBUG("new remote candidate, type=%s, addr=%s:%u"
" sid=%d, cid=%d, username=%s, pass=%s, prio=%u",
_transport_to_string (transport), tmpbuf,
addr? address_get_port (addr) : 0, stream_id,
component_id, username, password, priority);
}
if (base_addr)
candidate->base_addr = *base_addr;
candidate->transport = transport;
candidate->priority = priority;
if (username) candidate->username = strdup(username);
if (password) candidate->password = strdup(password);
if (foundation) {
strncpy(candidate->foundation, foundation,
ICE_CANDIDATE_MAX_FOUNDATION);
}
}
if (conn_check_add_for_candidate(agent, stream_id, component, candidate) < 0) {
goto errors;
}
return ICE_OK;
errors:
ICE_ERROR("got error");
candidate_free(candidate);
return ICE_ERR;
}
static int
_set_remote_candidates_locked(agent_t *agent, stream_t *stream,
component_t *component, const candidate_head_t *candidates) {
int added = 0;
candidate_t *d = NULL;
TAILQ_FOREACH(d,candidates,list) {
{
char tmpbuf[INET6_ADDRSTRLEN];
address_to_string (&d->addr, tmpbuf);
ICE_DEBUG("remote candidate, addr:%s, port:%u, foundation=%s(%p)",
tmpbuf, address_get_port(&d->addr), d->foundation, d);
}
if (address_is_valid(&d->addr)) {
int res = priv_add_remote_candidate(
agent,
stream->id,
component->id,
d->type,
&d->addr,
&d->base_addr,
d->transport,
d->priority,
d->username,
d->password,
d->foundation);
if (res == ICE_OK)
++added;
}
}
conn_check_remote_candidates_set(agent);
ICE_DEBUG("schedule any conn checks, added=%u", added);
if (added > 0) {
int res = conn_check_schedule_next(agent);
if (res != ICE_TRUE)
ICE_ERROR("unable to schedule any conn checks, res=%u", res);
}
return added;
}
int
ice_agent_set_remote_candidates(agent_t *agent, uint32_t stream_id,
uint32_t component_id, const candidate_head_t *candidates)
{
int added = 0;
stream_t *stream;
component_t *component;
if ( agent == NULL || stream_id < 1 || component_id < 1 ) {
return added;
}
ICE_DEBUG("set_remote_candidates, sid=%d, cid=%d", stream_id, component_id);
if (agent_find_component(agent, stream_id, component_id,
&stream, &component) != ICE_OK) {
ICE_ERROR("Could not find component %u in stream %u", component_id, stream_id);
added = -1;
goto done;
}
added = _set_remote_candidates_locked(agent, stream, component, candidates);
ICE_DEBUG("pair added, added=%u",added);
done:
return added;
}
void
agent_signal_new_selected_pair (agent_t *agent, uint32_t stream_id,
uint32_t component_id, candidate_t *lcandidate, candidate_t *rcandidate)
{
component_t *component;
stream_t *stream;
if (agent_find_component(agent, stream_id, component_id,
&stream, &component) != ICE_OK)
return;
if (((socket_t *)lcandidate->sockptr)->type == ICE_SOCKET_TYPE_UDP_TURN) {
/*FIXME: not support upd-turn */
//nice_udp_turn_socket_set_peer (lcandidate->sockptr, &rcandidate->addr);
}
/*FIXME: not suport reliable socket */
/*if(agent->reliable && !nice_socket_is_reliable (lcandidate->sockptr)) {
if (!component->tcp)
pseudo_tcp_socket_create (agent, stream, component);
process_queued_tcp_packets (agent, stream, component);
pseudo_tcp_socket_connect (component->tcp);
pseudo_tcp_socket_notify_mtu (component->tcp, MAX_TCP_MTU);
adjust_tcp_clock (agent, stream, component);
}*/
{
char ip[100];
uint32_t port;
port = address_get_port (&lcandidate->addr);
address_to_string (&lcandidate->addr, ip);
ICE_DEBUG("Local selected pair: %d:%d %s %s %s:%d %s",
stream_id, component_id, lcandidate->foundation,
lcandidate->transport == ICE_CANDIDATE_TRANSPORT_TCP_ACTIVE ?
"TCP-ACT" :
lcandidate->transport == ICE_CANDIDATE_TRANSPORT_TCP_PASSIVE ?
"TCP-PASS" :
lcandidate->transport == ICE_CANDIDATE_TRANSPORT_UDP ? "UDP" : "???",
ip, port, lcandidate->type == ICE_CANDIDATE_TYPE_HOST ? "HOST" :
lcandidate->type == ICE_CANDIDATE_TYPE_SERVER_REFLEXIVE ?
"SRV-RFLX" :
lcandidate->type == ICE_CANDIDATE_TYPE_RELAYED ?
"RELAYED" :
lcandidate->type == ICE_CANDIDATE_TYPE_PEER_REFLEXIVE ?