#include "asterisk/unaligned.h"
#include "asterisk/module.h"
#include "asterisk/rtp_engine.h"
+#include "asterisk/test.h"
#define MAX_TIMESTAMP_SKEW 640
pj_turn_sock *turn_rtcp; /*!< RTCP TURN relay */
pj_turn_state_t turn_state; /*!< Current state of the TURN relay session */
unsigned int passthrough:1; /*!< Bit to indicate that the received packet should be passed through */
- unsigned int ice_started:1; /*!< Bit to indicate ICE connectivity checks have started */
+ unsigned int ice_port; /*!< Port that ICE was started with if it was previously started */
char remote_ufrag[256]; /*!< The remote ICE username */
char remote_passwd[256]; /*!< The remote ICE password */
char local_ufrag[256]; /*!< The local ICE username */
char local_passwd[256]; /*!< The local ICE password */
- struct ao2_container *local_candidates; /*!< The local ICE candidates */
- struct ao2_container *remote_candidates; /*!< The remote ICE candidates */
+ struct ao2_container *ice_local_candidates; /*!< The local ICE candidates */
+ struct ao2_container *ice_active_remote_candidates; /*!< The remote ICE candidates */
+ struct ao2_container *ice_proposed_remote_candidates; /*!< Incoming remote ICE candidates for new session */
+ struct ast_sockaddr ice_original_rtp_addr; /*!< rtp address that ICE started on first session */
#endif
#ifdef HAVE_OPENSSL_SRTP
}
}
+static int ice_candidate_cmp(void *obj, void *arg, int flags)
+{
+ struct ast_rtp_engine_ice_candidate *candidate1 = obj, *candidate2 = arg;
+
+ if (strcmp(candidate1->foundation, candidate2->foundation) ||
+ candidate1->id != candidate2->id ||
+ ast_sockaddr_cmp(&candidate1->address, &candidate2->address) ||
+ candidate1->type != candidate1->type) {
+ return 0;
+ }
+
+ return CMP_MATCH | CMP_STOP;
+}
+
static void ast_rtp_ice_add_remote_candidate(struct ast_rtp_instance *instance, const struct ast_rtp_engine_ice_candidate *candidate)
{
struct ast_rtp *rtp = ast_rtp_instance_get_data(instance);
struct ast_rtp_engine_ice_candidate *remote_candidate;
- if (!rtp->remote_candidates && !(rtp->remote_candidates = ao2_container_alloc(1, NULL, NULL))) {
+ if (!rtp->ice_proposed_remote_candidates &&
+ !(rtp->ice_proposed_remote_candidates = ao2_container_alloc(1, NULL, ice_candidate_cmp))) {
return;
}
/* If this is going to exceed the maximum number of ICE candidates don't even add it */
- if (ao2_container_count(rtp->remote_candidates) == PJ_ICE_MAX_CAND) {
+ if (ao2_container_count(rtp->ice_proposed_remote_candidates) == PJ_ICE_MAX_CAND) {
return;
}
ast_sockaddr_copy(&remote_candidate->relay_address, &candidate->relay_address);
remote_candidate->type = candidate->type;
- ao2_link(rtp->remote_candidates, remote_candidate);
+ ao2_link(rtp->ice_proposed_remote_candidates, remote_candidate);
ao2_ref(remote_candidate, -1);
}
return;
}
+static int ice_create(struct ast_rtp_instance *instance, struct ast_sockaddr *addr,
+ int port, int replace);
+
+static void ast_rtp_ice_stop(struct ast_rtp_instance *instance)
+{
+ struct ast_rtp *rtp = ast_rtp_instance_get_data(instance);
+
+ if (!rtp->ice) {
+ return;
+ }
+
+ pj_thread_register_check();
+
+ pj_ice_sess_destroy(rtp->ice);
+ rtp->ice = NULL;
+}
+
+static int ice_reset_session(struct ast_rtp_instance *instance)
+{
+ struct ast_rtp *rtp = ast_rtp_instance_get_data(instance);
+
+ ast_rtp_ice_stop(instance);
+ return ice_create(instance, &rtp->ice_original_rtp_addr, rtp->ice_port, 1);
+}
+
+static int ice_candidates_compare(struct ao2_container *left, struct ao2_container *right)
+{
+ struct ao2_iterator i;
+ struct ast_rtp_engine_ice_candidate *right_candidate;
+
+ if (ao2_container_count(left) != ao2_container_count(right)) {
+ return -1;
+ }
+
+ i = ao2_iterator_init(right, 0);
+ while ((right_candidate = ao2_iterator_next(&i))) {
+ struct ast_rtp_engine_ice_candidate *left_candidate = ao2_find(left, right_candidate, OBJ_POINTER);
+
+ if (!left_candidate) {
+ ao2_ref(right_candidate, -1);
+ ao2_iterator_destroy(&i);
+ return -1;
+ }
+
+ ao2_ref(left_candidate, -1);
+ ao2_ref(right_candidate, -1);
+ }
+ ao2_iterator_destroy(&i);
+
+ return 0;
+}
+
static void ast_rtp_ice_start(struct ast_rtp_instance *instance)
{
struct ast_rtp *rtp = ast_rtp_instance_get_data(instance);
struct ast_rtp_engine_ice_candidate *candidate;
int cand_cnt = 0;
- if (!rtp->ice || !rtp->remote_candidates || rtp->ice_started) {
+ if (!rtp->ice || !rtp->ice_proposed_remote_candidates) {
+ return;
+ }
+
+ /* Check for equivalence in the lists */
+ if (rtp->ice_active_remote_candidates &&
+ !ice_candidates_compare(rtp->ice_proposed_remote_candidates, rtp->ice_active_remote_candidates)) {
+ ao2_cleanup(rtp->ice_proposed_remote_candidates);
+ rtp->ice_proposed_remote_candidates = NULL;
+ return;
+ }
+
+ /* Out with the old, in with the new */
+ ao2_cleanup(rtp->ice_active_remote_candidates);
+ rtp->ice_active_remote_candidates = rtp->ice_proposed_remote_candidates;
+ rtp->ice_proposed_remote_candidates = NULL;
+
+ /* Reset the ICE session. Is this going to work? */
+ if (ice_reset_session(instance)) {
+ ast_log(LOG_NOTICE, "Failed to create replacement ICE session\n");
return;
}
pj_thread_register_check();
- i = ao2_iterator_init(rtp->remote_candidates, 0);
+ i = ao2_iterator_init(rtp->ice_active_remote_candidates, 0);
while ((candidate = ao2_iterator_next(&i)) && (cand_cnt < PJ_ICE_MAX_CAND)) {
pj_str_t address;
}
cand_cnt++;
+ ao2_ref(candidate, -1);
}
ao2_iterator_destroy(&i);
- if (pj_ice_sess_create_check_list(rtp->ice, &ufrag, &passwd, ao2_container_count(rtp->remote_candidates), &candidates[0]) == PJ_SUCCESS) {
+ if (pj_ice_sess_create_check_list(rtp->ice, &ufrag, &passwd, ao2_container_count(rtp->ice_active_remote_candidates), &candidates[0]) == PJ_SUCCESS) {
+ ast_test_suite_event_notify("ICECHECKLISTCREATE", "Result: SUCCESS");
pj_ice_sess_start_check(rtp->ice);
pj_timer_heap_poll(timerheap, NULL);
- rtp->ice_started = 1;
rtp->strict_rtp_state = STRICT_RTP_OPEN;
return;
}
+ ast_test_suite_event_notify("ICECHECKLISTCREATE", "Result: FAILURE");
+
/* even though create check list failed don't stop ice as
it might still work */
ast_debug(1, "Failed to create ICE session check list\n");
/* however we do need to reset remote candidates since
this function may be re-entered */
- ao2_ref(rtp->remote_candidates, -1);
- rtp->remote_candidates = NULL;
+ ao2_ref(rtp->ice_active_remote_candidates, -1);
+ rtp->ice_active_remote_candidates = NULL;
rtp->ice->rcand_cnt = rtp->ice->clist.count = 0;
}
-static void ast_rtp_ice_stop(struct ast_rtp_instance *instance)
-{
- struct ast_rtp *rtp = ast_rtp_instance_get_data(instance);
-
- if (!rtp->ice) {
- return;
- }
-
- pj_thread_register_check();
-
- pj_ice_sess_destroy(rtp->ice);
- rtp->ice = NULL;
-}
-
static const char *ast_rtp_ice_get_ufrag(struct ast_rtp_instance *instance)
{
struct ast_rtp *rtp = ast_rtp_instance_get_data(instance);
{
struct ast_rtp *rtp = ast_rtp_instance_get_data(instance);
- if (rtp->local_candidates) {
- ao2_ref(rtp->local_candidates, +1);
+ if (rtp->ice_local_candidates) {
+ ao2_ref(rtp->ice_local_candidates, +1);
}
- return rtp->local_candidates;
+ return rtp->ice_local_candidates;
}
static void ast_rtp_ice_lite(struct ast_rtp_instance *instance)
pj_ice_sess_change_role(rtp->ice, PJ_ICE_SESS_ROLE_CONTROLLING);
}
-static int ice_candidate_cmp(void *obj, void *arg, int flags)
-{
- struct ast_rtp_engine_ice_candidate *candidate1 = obj, *candidate2 = arg;
-
- if ((strcmp(candidate1->foundation, candidate2->foundation)) ||
- (candidate1->id != candidate2->id) ||
- (ast_sockaddr_cmp(&candidate1->address, &candidate2->address)) ||
- (candidate1->type != candidate1->type)) {
- return 0;
- }
-
- return CMP_MATCH | CMP_STOP;
-}
-
static void ast_rtp_ice_add_cand(struct ast_rtp *rtp, unsigned comp_id, unsigned transport_id, pj_ice_cand_type type, pj_uint16_t local_pref,
const pj_sockaddr_t *addr, const pj_sockaddr_t *base_addr, const pj_sockaddr_t *rel_addr, int addr_len)
{
pj_ice_calc_foundation(rtp->ice->pool, &foundation, type, addr);
- if (!rtp->local_candidates && !(rtp->local_candidates = ao2_container_alloc(1, NULL, ice_candidate_cmp))) {
+ if (!rtp->ice_local_candidates && !(rtp->ice_local_candidates = ao2_container_alloc(1, NULL, ice_candidate_cmp))) {
return;
}
candidate->type = AST_RTP_ICE_CANDIDATE_TYPE_RELAYED;
}
- if ((existing = ao2_find(rtp->local_candidates, candidate, OBJ_POINTER))) {
+ if ((existing = ao2_find(rtp->ice_local_candidates, candidate, OBJ_POINTER))) {
ao2_ref(existing, -1);
ao2_ref(candidate, -1);
return;
/* By placing the candidate into the ICE session it will have produced the priority, so update the local candidate with it */
candidate->priority = rtp->ice->lcand[rtp->ice->lcand_cnt - 1].prio;
- ao2_link(rtp->local_candidates, candidate);
+ ao2_link(rtp->ice_local_candidates, candidate);
ao2_ref(candidate, -1);
}
return (unsigned int) ms;
}
+#ifdef HAVE_PJPROJECT
+/*!
+ * \internal
+ * \brief Creates an ICE session. Can be used to replace a destroyed ICE session.
+ *
+ * \param instance RTP instance for which the ICE session is being replaced
+ * \param addr ast_sockaddr to use for adding RTP candidates to the ICE session
+ * \param port port to use for adding RTP candidates to the ICE session
+ * \param replace 0 when creating a new session, 1 when replacing a destroyed session
+ *
+ * \retval 0 on success
+ * \retval -1 on failure
+ */
+static int ice_create(struct ast_rtp_instance *instance, struct ast_sockaddr *addr,
+ int port, int replace)
+{
+ pj_stun_config stun_config;
+ pj_str_t ufrag, passwd;
+ struct ast_rtp *rtp = ast_rtp_instance_get_data(instance);
+
+ ao2_cleanup(rtp->ice_local_candidates);
+ rtp->ice_local_candidates = NULL;
+
+ pj_thread_register_check();
+
+ pj_stun_config_init(&stun_config, &cachingpool.factory, 0, ioqueue, timerheap);
+
+ ufrag = pj_str(rtp->local_ufrag);
+ passwd = pj_str(rtp->local_passwd);
+
+ /* Create an ICE session for ICE negotiation */
+ if (pj_ice_sess_create(&stun_config, NULL, PJ_ICE_SESS_ROLE_UNKNOWN, 2,
+ &ast_rtp_ice_sess_cb, &ufrag, &passwd, NULL, &rtp->ice) == PJ_SUCCESS) {
+ /* Make this available for the callbacks */
+ rtp->ice->user_data = rtp;
+
+ /* Add all of the available candidates to the ICE session */
+ rtp_add_candidates_to_ice(instance, rtp, addr, port, AST_RTP_ICE_COMPONENT_RTP,
+ TRANSPORT_SOCKET_RTP, &ast_rtp_turn_rtp_sock_cb, &rtp->turn_rtp);
+
+ /* Only add the RTCP candidates to ICE when replacing the session. New sessions
+ * handle this in a separate part of the setup phase */
+ if (replace && rtp->rtcp) {
+ rtp_add_candidates_to_ice(instance, rtp, &rtp->rtcp->us,
+ ast_sockaddr_port(&rtp->rtcp->us), AST_RTP_ICE_COMPONENT_RTCP,
+ TRANSPORT_SOCKET_RTCP, &ast_rtp_turn_rtcp_sock_cb, &rtp->turn_rtcp);
+ }
+
+ return 0;
+ }
+
+ return -1;
+
+}
+#endif
+
static int ast_rtp_new(struct ast_rtp_instance *instance,
struct ast_sched_context *sched, struct ast_sockaddr *addr,
void *data)
{
struct ast_rtp *rtp = NULL;
int x, startplace;
-#ifdef HAVE_PJPROJECT
- pj_stun_config stun_config;
- pj_str_t ufrag, passwd;
-#endif
/* Create a new RTP structure to hold all of our data */
if (!(rtp = ast_calloc(1, sizeof(*rtp)))) {
}
#ifdef HAVE_PJPROJECT
- pj_thread_register_check();
-
- pj_stun_config_init(&stun_config, &cachingpool.factory, 0, ioqueue, timerheap);
-
generate_random_string(rtp->local_ufrag, sizeof(rtp->local_ufrag));
- ufrag = pj_str(rtp->local_ufrag);
generate_random_string(rtp->local_passwd, sizeof(rtp->local_passwd));
- passwd = pj_str(rtp->local_passwd);
#endif
ast_rtp_instance_set_data(instance, rtp);
#ifdef HAVE_PJPROJECT
/* Create an ICE session for ICE negotiation */
- if (icesupport && pj_ice_sess_create(&stun_config, NULL, PJ_ICE_SESS_ROLE_UNKNOWN, 2, &ast_rtp_ice_sess_cb, &ufrag, &passwd, NULL, &rtp->ice) == PJ_SUCCESS) {
- /* Make this available for the callbacks */
- rtp->ice->user_data = rtp;
-
- /* Add all of the available candidates to the ICE session */
- rtp_add_candidates_to_ice(instance, rtp, addr, x, AST_RTP_ICE_COMPONENT_RTP, TRANSPORT_SOCKET_RTP, &ast_rtp_turn_rtp_sock_cb, &rtp->turn_rtp);
+ if (icesupport) {
+ if (ice_create(instance, addr, x, 0)) {
+ ast_log(LOG_NOTICE, "Failed to start ICE session\n");
+ } else {
+ rtp->ice_port = x;
+ ast_sockaddr_copy(&rtp->ice_original_rtp_addr, addr);
+ }
}
#endif
}
/* Destroy any candidates */
- if (rtp->local_candidates) {
- ao2_ref(rtp->local_candidates, -1);
+ if (rtp->ice_local_candidates) {
+ ao2_ref(rtp->ice_local_candidates, -1);
}
- if (rtp->remote_candidates) {
- ao2_ref(rtp->remote_candidates, -1);
+ if (rtp->ice_active_remote_candidates) {
+ ao2_ref(rtp->ice_active_remote_candidates, -1);
}
#endif
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