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asterisk/res/res_pjsip_session.c

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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2013, Digium, Inc.
*
* Mark Michelson <mmichelson@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*** MODULEINFO
<depend>pjproject</depend>
<depend>res_pjsip</depend>
<support_level>core</support_level>
***/
#include "asterisk.h"
#include <pjsip.h>
#include <pjsip_ua.h>
#include <pjlib.h>
#include <pjmedia.h>
#include "asterisk/res_pjsip.h"
#include "asterisk/res_pjsip_session.h"
#include "asterisk/res_pjsip_session_caps.h"
#include "asterisk/callerid.h"
#include "asterisk/datastore.h"
#include "asterisk/module.h"
#include "asterisk/logger.h"
#include "asterisk/res_pjsip.h"
#include "asterisk/astobj2.h"
#include "asterisk/lock.h"
#include "asterisk/uuid.h"
#include "asterisk/pbx.h"
#include "asterisk/taskprocessor.h"
#include "asterisk/causes.h"
#include "asterisk/sdp_srtp.h"
#include "asterisk/dsp.h"
#include "asterisk/acl.h"
#include "asterisk/features_config.h"
#include "asterisk/pickup.h"
#include "asterisk/test.h"
#include "asterisk/stream.h"
#include "asterisk/vector.h"
#include "res_pjsip_session/pjsip_session.h"
#define SDP_HANDLER_BUCKETS 11
#define MOD_DATA_ON_RESPONSE "on_response"
#define MOD_DATA_NAT_HOOK "nat_hook"
/* Most common case is one audio and one video stream */
#define DEFAULT_NUM_SESSION_MEDIA 2
/* Some forward declarations */
static void handle_session_begin(struct ast_sip_session *session);
static void handle_session_end(struct ast_sip_session *session);
static void handle_session_destroy(struct ast_sip_session *session);
static void handle_incoming_request(struct ast_sip_session *session, pjsip_rx_data *rdata);
static void handle_incoming_response(struct ast_sip_session *session, pjsip_rx_data *rdata,
enum ast_sip_session_response_priority response_priority);
static int handle_incoming(struct ast_sip_session *session, pjsip_rx_data *rdata,
enum ast_sip_session_response_priority response_priority);
static void handle_outgoing_request(struct ast_sip_session *session, pjsip_tx_data *tdata);
static void handle_outgoing_response(struct ast_sip_session *session, pjsip_tx_data *tdata);
static int sip_session_refresh(struct ast_sip_session *session,
ast_sip_session_request_creation_cb on_request_creation,
ast_sip_session_sdp_creation_cb on_sdp_creation,
ast_sip_session_response_cb on_response,
enum ast_sip_session_refresh_method method, int generate_new_sdp,
struct ast_sip_session_media_state *pending_media_state,
struct ast_sip_session_media_state *active_media_state,
int queued);
/*! \brief NAT hook for modifying outgoing messages with SDP */
static struct ast_sip_nat_hook *nat_hook;
/*!
* \brief Registered SDP stream handlers
*
* This container is keyed on stream types. Each
* object in the container is a linked list of
* handlers for the stream type.
*/
static struct ao2_container *sdp_handlers;
/*!
* These are the objects in the sdp_handlers container
*/
struct sdp_handler_list {
/* The list of handlers to visit */
AST_LIST_HEAD_NOLOCK(, ast_sip_session_sdp_handler) list;
/* The handlers in this list handle streams of this type */
char stream_type[1];
};
static struct pjmedia_sdp_session *create_local_sdp(pjsip_inv_session *inv, struct ast_sip_session *session, const pjmedia_sdp_session *offer, const unsigned int ignore_active_stream_topology);
static int sdp_handler_list_hash(const void *obj, int flags)
{
const struct sdp_handler_list *handler_list = obj;
const char *stream_type = flags & OBJ_KEY ? obj : handler_list->stream_type;
return ast_str_hash(stream_type);
}
const char *ast_sip_session_get_name(const struct ast_sip_session *session)
{
if (!session) {
return "(null session)";
}
if (session->channel) {
return ast_channel_name(session->channel);
} else if (session->endpoint) {
return ast_sorcery_object_get_id(session->endpoint);
} else {
return "unknown";
}
}
int ast_sip_can_present_connected_id(const struct ast_sip_session *session, const struct ast_party_id *id)
{
return id->number.valid
&& (session->endpoint->id.trust_outbound
|| (ast_party_id_presentation(id) & AST_PRES_RESTRICTION) == AST_PRES_ALLOWED);
}
static int sdp_handler_list_cmp(void *obj, void *arg, int flags)
{
struct sdp_handler_list *handler_list1 = obj;
struct sdp_handler_list *handler_list2 = arg;
const char *stream_type2 = flags & OBJ_KEY ? arg : handler_list2->stream_type;
return strcmp(handler_list1->stream_type, stream_type2) ? 0 : CMP_MATCH | CMP_STOP;
}
int ast_sip_session_register_sdp_handler(struct ast_sip_session_sdp_handler *handler, const char *stream_type)
{
RAII_VAR(struct sdp_handler_list *, handler_list,
ao2_find(sdp_handlers, stream_type, OBJ_KEY), ao2_cleanup);
SCOPED_AO2LOCK(lock, sdp_handlers);
if (handler_list) {
struct ast_sip_session_sdp_handler *iter;
/* Check if this handler is already registered for this stream type */
AST_LIST_TRAVERSE(&handler_list->list, iter, next) {
if (!strcmp(iter->id, handler->id)) {
ast_log(LOG_WARNING, "Handler '%s' already registered for stream type '%s'.\n", handler->id, stream_type);
return -1;
}
}
AST_LIST_INSERT_TAIL(&handler_list->list, handler, next);
ast_debug(1, "Registered SDP stream handler '%s' for stream type '%s'\n", handler->id, stream_type);
return 0;
}
/* No stream of this type has been registered yet, so we need to create a new list */
handler_list = ao2_alloc(sizeof(*handler_list) + strlen(stream_type), NULL);
if (!handler_list) {
return -1;
}
/* Safe use of strcpy */
strcpy(handler_list->stream_type, stream_type);
AST_LIST_HEAD_INIT_NOLOCK(&handler_list->list);
AST_LIST_INSERT_TAIL(&handler_list->list, handler, next);
if (!ao2_link(sdp_handlers, handler_list)) {
return -1;
}
ast_debug(1, "Registered SDP stream handler '%s' for stream type '%s'\n", handler->id, stream_type);
return 0;
}
static int remove_handler(void *obj, void *arg, void *data, int flags)
{
struct sdp_handler_list *handler_list = obj;
struct ast_sip_session_sdp_handler *handler = data;
struct ast_sip_session_sdp_handler *iter;
const char *stream_type = arg;
AST_LIST_TRAVERSE_SAFE_BEGIN(&handler_list->list, iter, next) {
if (!strcmp(iter->id, handler->id)) {
AST_LIST_REMOVE_CURRENT(next);
ast_debug(1, "Unregistered SDP stream handler '%s' for stream type '%s'\n", handler->id, stream_type);
}
}
AST_LIST_TRAVERSE_SAFE_END;
if (AST_LIST_EMPTY(&handler_list->list)) {
ast_debug(3, "No more handlers exist for stream type '%s'\n", stream_type);
return CMP_MATCH;
} else {
return CMP_STOP;
}
}
void ast_sip_session_unregister_sdp_handler(struct ast_sip_session_sdp_handler *handler, const char *stream_type)
{
ao2_callback_data(sdp_handlers, OBJ_KEY | OBJ_UNLINK | OBJ_NODATA, remove_handler, (void *)stream_type, handler);
}
static int media_stats_local_ssrc_cmp(
const struct ast_rtp_instance_stats *vec_elem, const struct ast_rtp_instance_stats *srch)
{
if (vec_elem->local_ssrc == srch->local_ssrc) {
return 1;
}
return 0;
}
static struct ast_sip_session_media_state *internal_sip_session_media_state_alloc(
size_t sessions, size_t read_callbacks)
{
struct ast_sip_session_media_state *media_state;
media_state = ast_calloc(1, sizeof(*media_state));
if (!media_state) {
return NULL;
}
if (AST_VECTOR_INIT(&media_state->sessions, sessions) < 0) {
ast_free(media_state);
return NULL;
}
if (AST_VECTOR_INIT(&media_state->read_callbacks, read_callbacks) < 0) {
AST_VECTOR_FREE(&media_state->sessions);
ast_free(media_state);
return NULL;
}
return media_state;
}
struct ast_sip_session_media_state *ast_sip_session_media_state_alloc(void)
{
return internal_sip_session_media_state_alloc(
DEFAULT_NUM_SESSION_MEDIA, DEFAULT_NUM_SESSION_MEDIA);
}
void ast_sip_session_media_stats_save(struct ast_sip_session *sip_session, struct ast_sip_session_media_state *media_state)
{
int i;
int ret;
if (!media_state || !sip_session) {
return;
}
for (i = 0; i < AST_VECTOR_SIZE(&media_state->sessions); i++) {
struct ast_rtp_instance_stats *stats_tmp = NULL;
struct ast_sip_session_media *media = AST_VECTOR_GET(&media_state->sessions, i);
if (!media || !media->rtp) {
continue;
}
stats_tmp = ast_calloc(1, sizeof(struct ast_rtp_instance_stats));
if (!stats_tmp) {
return;
}
ret = ast_rtp_instance_get_stats(media->rtp, stats_tmp, AST_RTP_INSTANCE_STAT_ALL);
if (ret) {
ast_free(stats_tmp);
continue;
}
/* remove all the duplicated stats if exist */
AST_VECTOR_REMOVE_CMP_UNORDERED(&sip_session->media_stats, stats_tmp, media_stats_local_ssrc_cmp, ast_free);
AST_VECTOR_APPEND(&sip_session->media_stats, stats_tmp);
}
}
void ast_sip_session_media_state_reset(struct ast_sip_session_media_state *media_state)
{
int index;
if (!media_state) {
return;
}
AST_VECTOR_RESET(&media_state->sessions, ao2_cleanup);
AST_VECTOR_RESET(&media_state->read_callbacks, AST_VECTOR_ELEM_CLEANUP_NOOP);
for (index = 0; index < AST_MEDIA_TYPE_END; ++index) {
media_state->default_session[index] = NULL;
}
ast_stream_topology_free(media_state->topology);
media_state->topology = NULL;
}
struct ast_sip_session_media_state *ast_sip_session_media_state_clone(const struct ast_sip_session_media_state *media_state)
{
struct ast_sip_session_media_state *cloned;
int index;
if (!media_state) {
return NULL;
}
cloned = internal_sip_session_media_state_alloc(
AST_VECTOR_SIZE(&media_state->sessions),
AST_VECTOR_SIZE(&media_state->read_callbacks));
if (!cloned) {
return NULL;
}
if (media_state->topology) {
cloned->topology = ast_stream_topology_clone(media_state->topology);
if (!cloned->topology) {
ast_sip_session_media_state_free(cloned);
return NULL;
}
}
for (index = 0; index < AST_VECTOR_SIZE(&media_state->sessions); ++index) {
struct ast_sip_session_media *session_media = AST_VECTOR_GET(&media_state->sessions, index);
enum ast_media_type type = ast_stream_get_type(ast_stream_topology_get_stream(cloned->topology, index));
ao2_bump(session_media);
if (AST_VECTOR_REPLACE(&cloned->sessions, index, session_media)) {
ao2_cleanup(session_media);
}
if (ast_stream_get_state(ast_stream_topology_get_stream(cloned->topology, index)) != AST_STREAM_STATE_REMOVED &&
!cloned->default_session[type]) {
cloned->default_session[type] = session_media;
}
}
for (index = 0; index < AST_VECTOR_SIZE(&media_state->read_callbacks); ++index) {
struct ast_sip_session_media_read_callback_state *read_callback = AST_VECTOR_GET_ADDR(&media_state->read_callbacks, index);
AST_VECTOR_REPLACE(&cloned->read_callbacks, index, *read_callback);
}
return cloned;
}
void ast_sip_session_media_state_free(struct ast_sip_session_media_state *media_state)
{
if (!media_state) {
return;
}
/* This will reset the internal state so we only have to free persistent things */
ast_sip_session_media_state_reset(media_state);
AST_VECTOR_FREE(&media_state->sessions);
AST_VECTOR_FREE(&media_state->read_callbacks);
ast_free(media_state);
}
int ast_sip_session_is_pending_stream_default(const struct ast_sip_session *session, const struct ast_stream *stream)
{
int index;
if (!session->pending_media_state->topology) {
ast_log(LOG_WARNING, "Pending topology was NULL for channel '%s'\n",
session->channel ? ast_channel_name(session->channel) : "unknown");
return 0;
}
if (ast_stream_get_state(stream) == AST_STREAM_STATE_REMOVED) {
return 0;
}
for (index = 0; index < ast_stream_topology_get_count(session->pending_media_state->topology); ++index) {
if (ast_stream_get_type(ast_stream_topology_get_stream(session->pending_media_state->topology, index)) !=
ast_stream_get_type(stream)) {
continue;
}
return ast_stream_topology_get_stream(session->pending_media_state->topology, index) == stream ? 1 : 0;
}
return 0;
}
int ast_sip_session_media_add_read_callback(struct ast_sip_session *session, struct ast_sip_session_media *session_media,
int fd, ast_sip_session_media_read_cb callback)
{
struct ast_sip_session_media_read_callback_state callback_state = {
.fd = fd,
.read_callback = callback,
.session = session_media,
};
/* The contents of the vector are whole structs and not pointers */
return AST_VECTOR_APPEND(&session->pending_media_state->read_callbacks, callback_state);
}
int ast_sip_session_media_set_write_callback(struct ast_sip_session *session, struct ast_sip_session_media *session_media,
ast_sip_session_media_write_cb callback)
{
if (session_media->write_callback) {
if (session_media->write_callback == callback) {
return 0;
}
return -1;
}
session_media->write_callback = callback;
return 0;
}
struct ast_sip_session_media *ast_sip_session_media_get_transport(struct ast_sip_session *session, struct ast_sip_session_media *session_media)
{
int index;
if (!session->endpoint->media.bundle || ast_strlen_zero(session_media->mid)) {
return session_media;
}
for (index = 0; index < AST_VECTOR_SIZE(&session->pending_media_state->sessions); ++index) {
struct ast_sip_session_media *bundle_group_session_media;
bundle_group_session_media = AST_VECTOR_GET(&session->pending_media_state->sessions, index);
/* The first session which is in the bundle group is considered the authoritative session for transport */
if (bundle_group_session_media->bundle_group == session_media->bundle_group) {
return bundle_group_session_media;
}
}
return session_media;
}
/*!
* \brief Set an SDP stream handler for a corresponding session media.
*
* \note Always use this function to set the SDP handler for a session media.
*
* This function will properly free resources on the SDP handler currently being
* used by the session media, then set the session media to use the new SDP
* handler.
*/
static void session_media_set_handler(struct ast_sip_session_media *session_media,
struct ast_sip_session_sdp_handler *handler)
{
ast_assert(session_media->handler != handler);
if (session_media->handler) {
session_media->handler->stream_destroy(session_media);
}
session_media->handler = handler;
}
static int stream_destroy(void *obj, void *arg, int flags)
{
struct sdp_handler_list *handler_list = obj;
struct ast_sip_session_media *session_media = arg;
struct ast_sip_session_sdp_handler *handler;
AST_LIST_TRAVERSE(&handler_list->list, handler, next) {
handler->stream_destroy(session_media);
}
return 0;
}
static void session_media_dtor(void *obj)
{
struct ast_sip_session_media *session_media = obj;
/* It is possible for multiple handlers to have allocated memory on the
* session media (usually through a stream changing types). Therefore, we
* traverse all the SDP handlers and let them all call stream_destroy on
* the session_media
*/
ao2_callback(sdp_handlers, 0, stream_destroy, session_media);
if (session_media->srtp) {
ast_sdp_srtp_destroy(session_media->srtp);
}
ast_free(session_media->mid);
ast_free(session_media->remote_mslabel);
ast_free(session_media->remote_label);
ast_free(session_media->stream_name);
}
struct ast_sip_session_media *ast_sip_session_media_state_add(struct ast_sip_session *session,
struct ast_sip_session_media_state *media_state, enum ast_media_type type, int position)
{
struct ast_sip_session_media *session_media = NULL;
struct ast_sip_session_media *current_session_media = NULL;
SCOPE_ENTER(1, "%s Adding position %d\n", ast_sip_session_get_name(session), position);
/* It is possible for this media state to already contain a session for the stream. If this
* is the case we simply return it.
*/
if (position < AST_VECTOR_SIZE(&media_state->sessions)) {
current_session_media = AST_VECTOR_GET(&media_state->sessions, position);
if (current_session_media && current_session_media->type == type) {
SCOPE_EXIT_RTN_VALUE(current_session_media, "Using existing media_session\n");
}
}
/* Determine if we can reuse the session media from the active media state if present */
if (position < AST_VECTOR_SIZE(&session->active_media_state->sessions)) {
session_media = AST_VECTOR_GET(&session->active_media_state->sessions, position);
/* A stream can never exist without an accompanying media session */
if (session_media->type == type) {
ao2_ref(session_media, +1);
ast_trace(1, "Reusing existing media session\n");
/*
* If this session_media was previously removed, its bundle group was probably reset
* to -1 so if bundling is enabled on the endpoint, we need to reset it to 0, set
* the bundled flag and reset its mid.
*/
if (session->endpoint->media.bundle && session_media->bundle_group == -1) {
session_media->bundled = session->endpoint->media.webrtc;
session_media->bundle_group = 0;
ast_free(session_media->mid);
if (ast_asprintf(&session_media->mid, "%s-%d", ast_codec_media_type2str(type), position) < 0) {
ao2_ref(session_media, -1);
SCOPE_EXIT_RTN_VALUE(NULL, "Couldn't alloc mid\n");
}
}
} else {
ast_trace(1, "Can't reuse existing media session because the types are different. %s <> %s\n",
ast_codec_media_type2str(type), ast_codec_media_type2str(session_media->type));
session_media = NULL;
}
}
if (!session_media) {
/* No existing media session we can use so create a new one */
session_media = ao2_alloc_options(sizeof(*session_media), session_media_dtor, AO2_ALLOC_OPT_LOCK_NOLOCK);
if (!session_media) {
return NULL;
}
ast_trace(1, "Creating new media session\n");
session_media->encryption = session->endpoint->media.rtp.encryption;
session_media->remote_ice = session->endpoint->media.rtp.ice_support;
session_media->remote_rtcp_mux = session->endpoint->media.rtcp_mux;
session_media->keepalive_sched_id = -1;
session_media->timeout_sched_id = -1;
session_media->type = type;
session_media->stream_num = position;
if (session->endpoint->media.bundle) {
/* This is a new stream so create a new mid based on media type and position, which makes it unique.
* If this is the result of an offer the mid will just end up getting replaced.
*/
if (ast_asprintf(&session_media->mid, "%s-%d", ast_codec_media_type2str(type), position) < 0) {
ao2_ref(session_media, -1);
SCOPE_EXIT_RTN_VALUE(NULL, "Couldn't alloc mid\n");
}
session_media->bundle_group = 0;
/* Some WebRTC clients can't handle an offer to bundle media streams. Instead they expect them to
* already be bundled. Every client handles this scenario though so if WebRTC is enabled just go
* ahead and treat the streams as having already been bundled.
*/
session_media->bundled = session->endpoint->media.webrtc;
} else {
session_media->bundle_group = -1;
}
}
ast_free(session_media->stream_name);
session_media->stream_name = ast_strdup(ast_stream_get_name(ast_stream_topology_get_stream(media_state->topology, position)));
if (AST_VECTOR_REPLACE(&media_state->sessions, position, session_media)) {
ao2_ref(session_media, -1);
SCOPE_EXIT_RTN_VALUE(NULL, "Couldn't replace media_session\n");
}
ao2_cleanup(current_session_media);
/* If this stream will be active in some way and it is the first of this type then consider this the default media session to match */
if (!media_state->default_session[type] && ast_stream_get_state(ast_stream_topology_get_stream(media_state->topology, position)) != AST_STREAM_STATE_REMOVED) {
ast_trace(1, "Setting media session as default for %s\n", ast_codec_media_type2str(session_media->type));
media_state->default_session[type] = session_media;
}
SCOPE_EXIT_RTN_VALUE(session_media, "Done\n");
}
static int is_stream_limitation_reached(enum ast_media_type type, const struct ast_sip_endpoint *endpoint, int *type_streams)
{
switch (type) {
case AST_MEDIA_TYPE_AUDIO:
return !(type_streams[type] < endpoint->media.max_audio_streams);
case AST_MEDIA_TYPE_VIDEO:
return !(type_streams[type] < endpoint->media.max_video_streams);
case AST_MEDIA_TYPE_IMAGE:
/* We don't have an option for image (T.38) streams so cap it to one. */
return (type_streams[type] > 0);
case AST_MEDIA_TYPE_UNKNOWN:
case AST_MEDIA_TYPE_TEXT:
default:
/* We don't want any unknown or "other" streams on our endpoint,
* so always just say we've reached the limit
*/
return 1;
}
}
static int get_mid_bundle_group(const pjmedia_sdp_session *sdp, const char *mid)
{
int bundle_group = 0;
int index;
for (index = 0; index < sdp->attr_count; ++index) {
pjmedia_sdp_attr *attr = sdp->attr[index];
char value[pj_strlen(&attr->value) + 1], *mids = value, *attr_mid;
if (pj_strcmp2(&attr->name, "group") || pj_strncmp2(&attr->value, "BUNDLE", 6)) {
continue;
}
ast_copy_pj_str(value, &attr->value, sizeof(value));
/* Skip the BUNDLE at the front */
mids += 7;
while ((attr_mid = strsep(&mids, " "))) {
if (!strcmp(attr_mid, mid)) {
/* The ordering of attributes determines our internal identification of the bundle group based on number,
* with -1 being not in a bundle group. Since this is only exposed internally for response purposes it's
* actually even fine if things move around.
*/
return bundle_group;
}
}
bundle_group++;
}
return -1;
}
static int set_mid_and_bundle_group(struct ast_sip_session *session,
struct ast_sip_session_media *session_media,
const pjmedia_sdp_session *sdp,
const struct pjmedia_sdp_media *stream)
{
pjmedia_sdp_attr *attr;
if (!session->endpoint->media.bundle) {
return 0;
}
/* By default on an incoming negotiation we assume no mid and bundle group is present */
ast_free(session_media->mid);
session_media->mid = NULL;
session_media->bundle_group = -1;
session_media->bundled = 0;
/* Grab the media identifier for the stream */
attr = pjmedia_sdp_media_find_attr2(stream, "mid", NULL);
if (!attr) {
return 0;
}
session_media->mid = ast_calloc(1, attr->value.slen + 1);
if (!session_media->mid) {
return 0;
}
ast_copy_pj_str(session_media->mid, &attr->value, attr->value.slen + 1);
/* Determine what bundle group this is part of */
session_media->bundle_group = get_mid_bundle_group(sdp, session_media->mid);
/* If this is actually part of a bundle group then the other side requested or accepted the bundle request */
session_media->bundled = session_media->bundle_group != -1;
return 0;
}
static void set_remote_mslabel_and_stream_group(struct ast_sip_session *session,
struct ast_sip_session_media *session_media,
const pjmedia_sdp_session *sdp,
const struct pjmedia_sdp_media *stream,
struct ast_stream *asterisk_stream)
{
int index;
ast_free(session_media->remote_mslabel);
session_media->remote_mslabel = NULL;
ast_free(session_media->remote_label);
session_media->remote_label = NULL;
for (index = 0; index < stream->attr_count; ++index) {
pjmedia_sdp_attr *attr = stream->attr[index];
char attr_value[pj_strlen(&attr->value) + 1];
char *ssrc_attribute_name, *ssrc_attribute_value = NULL;
char *msid, *tmp = attr_value;
static const pj_str_t STR_msid = { "msid", 4 };
static const pj_str_t STR_ssrc = { "ssrc", 4 };
static const pj_str_t STR_label = { "label", 5 };
if (!pj_strcmp(&attr->name, &STR_label)) {
ast_copy_pj_str(attr_value, &attr->value, sizeof(attr_value));
session_media->remote_label = ast_strdup(attr_value);
} else if (!pj_strcmp(&attr->name, &STR_msid)) {
ast_copy_pj_str(attr_value, &attr->value, sizeof(attr_value));
msid = strsep(&tmp, " ");
session_media->remote_mslabel = ast_strdup(msid);
break;
} else if (!pj_strcmp(&attr->name, &STR_ssrc)) {
ast_copy_pj_str(attr_value, &attr->value, sizeof(attr_value));
if ((ssrc_attribute_name = strchr(attr_value, ' '))) {
/* This has an actual attribute */
*ssrc_attribute_name++ = '\0';
ssrc_attribute_value = strchr(ssrc_attribute_name, ':');
if (ssrc_attribute_value) {
/* Values are actually optional according to the spec */
*ssrc_attribute_value++ = '\0';
}
if (!strcasecmp(ssrc_attribute_name, "mslabel") && !ast_strlen_zero(ssrc_attribute_value)) {
session_media->remote_mslabel = ast_strdup(ssrc_attribute_value);
break;
}
}
}
}
if (ast_strlen_zero(session_media->remote_mslabel)) {
return;
}
/* Iterate through the existing streams looking for a match and if so then group this with it */
for (index = 0; index < AST_VECTOR_SIZE(&session->pending_media_state->sessions); ++index) {
struct ast_sip_session_media *group_session_media;
group_session_media = AST_VECTOR_GET(&session->pending_media_state->sessions, index);
if (ast_strlen_zero(group_session_media->remote_mslabel) ||
strcmp(group_session_media->remote_mslabel, session_media->remote_mslabel)) {
continue;
}
ast_stream_set_group(asterisk_stream, index);
break;
}
}
static void remove_stream_from_bundle(struct ast_sip_session_media *session_media,
struct ast_stream *stream)
{
ast_stream_set_state(stream, AST_STREAM_STATE_REMOVED);
ast_free(session_media->mid);
session_media->mid = NULL;
session_media->bundle_group = -1;
session_media->bundled = 0;
}
static int handle_incoming_sdp(struct ast_sip_session *session, const pjmedia_sdp_session *sdp)
{
int i;
int handled = 0;
int type_streams[AST_MEDIA_TYPE_END] = {0};
SCOPE_ENTER(3, "%s: Media count: %d\n", ast_sip_session_get_name(session), sdp->media_count);
if (session->inv_session && session->inv_session->state == PJSIP_INV_STATE_DISCONNECTED) {
SCOPE_EXIT_LOG_RTN_VALUE(-1, LOG_ERROR, "%s: Failed to handle incoming SDP. Session has been already disconnected\n",
ast_sip_session_get_name(session));
}
/* It is possible for SDP deferral to have already created a pending topology */
if (!session->pending_media_state->topology) {
session->pending_media_state->topology = ast_stream_topology_alloc();
if (!session->pending_media_state->topology) {
SCOPE_EXIT_LOG_RTN_VALUE(-1, LOG_ERROR, "%s: Couldn't alloc pending topology\n",
ast_sip_session_get_name(session));
}
}
for (i = 0; i < sdp->media_count; ++i) {
/* See if there are registered handlers for this media stream type */
char media[20];
struct ast_sip_session_sdp_handler *handler;
RAII_VAR(struct sdp_handler_list *, handler_list, NULL, ao2_cleanup);
struct ast_sip_session_media *session_media = NULL;
int res;
enum ast_media_type type;
struct ast_stream *stream = NULL;
pjmedia_sdp_media *remote_stream = sdp->media[i];
SCOPE_ENTER(4, "%s: Processing stream %d\n", ast_sip_session_get_name(session), i);
/* We need a null-terminated version of the media string */
ast_copy_pj_str(media, &sdp->media[i]->desc.media, sizeof(media));
type = ast_media_type_from_str(media);
/* See if we have an already existing stream, which can occur from SDP deferral checking */
if (i < ast_stream_topology_get_count(session->pending_media_state->topology)) {
stream = ast_stream_topology_get_stream(session->pending_media_state->topology, i);
ast_trace(-1, "%s: Using existing pending stream %s\n", ast_sip_session_get_name(session),
ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
}
if (!stream) {
struct ast_stream *existing_stream = NULL;
char *stream_name = NULL, *stream_name_allocated = NULL;
const char *stream_label = NULL;
if (session->active_media_state->topology &&
(i < ast_stream_topology_get_count(session->active_media_state->topology))) {
existing_stream = ast_stream_topology_get_stream(session->active_media_state->topology, i);
ast_trace(-1, "%s: Found existing active stream %s\n", ast_sip_session_get_name(session),
ast_str_tmp(128, ast_stream_to_str(existing_stream, &STR_TMP)));
if (ast_stream_get_state(existing_stream) != AST_STREAM_STATE_REMOVED) {
stream_name = (char *)ast_stream_get_name(existing_stream);
stream_label = ast_stream_get_metadata(existing_stream, "SDP:LABEL");
}
}
if (ast_strlen_zero(stream_name)) {
if (ast_asprintf(&stream_name_allocated, "%s-%d", ast_codec_media_type2str(type), i) < 0) {
handled = 0;
SCOPE_EXIT_LOG_EXPR(goto end, LOG_ERROR, "%s: Couldn't alloc stream name\n",
ast_sip_session_get_name(session));
}
stream_name = stream_name_allocated;
ast_trace(-1, "%s: Using %s for new stream name\n", ast_sip_session_get_name(session),
stream_name);
}
stream = ast_stream_alloc(stream_name, type);
ast_free(stream_name_allocated);
if (!stream) {
handled = 0;
SCOPE_EXIT_LOG_EXPR(goto end, LOG_ERROR, "%s: Couldn't alloc stream\n",
ast_sip_session_get_name(session));
}
if (!ast_strlen_zero(stream_label)) {
ast_stream_set_metadata(stream, "SDP:LABEL", stream_label);
ast_trace(-1, "%s: Using %s for new stream label\n", ast_sip_session_get_name(session),
stream_label);
}
if (ast_stream_topology_set_stream(session->pending_media_state->topology, i, stream)) {
ast_stream_free(stream);
handled = 0;
SCOPE_EXIT_LOG_EXPR(goto end, LOG_ERROR, "%s: Couldn't set stream in topology\n",
ast_sip_session_get_name(session));
}
/* For backwards compatibility with the core the default audio stream is always sendrecv */
if (!ast_sip_session_is_pending_stream_default(session, stream) || strcmp(media, "audio")) {
if (pjmedia_sdp_media_find_attr2(remote_stream, "sendonly", NULL)) {
/* Stream state reflects our state of a stream, so in the case of
* sendonly and recvonly we store the opposite since that is what ours
* is.
*/
ast_stream_set_state(stream, AST_STREAM_STATE_RECVONLY);
} else if (pjmedia_sdp_media_find_attr2(remote_stream, "recvonly", NULL)) {
ast_stream_set_state(stream, AST_STREAM_STATE_SENDONLY);
} else if (pjmedia_sdp_media_find_attr2(remote_stream, "inactive", NULL)) {
ast_stream_set_state(stream, AST_STREAM_STATE_INACTIVE);
} else {
ast_stream_set_state(stream, AST_STREAM_STATE_SENDRECV);
}
} else {
ast_stream_set_state(stream, AST_STREAM_STATE_SENDRECV);
}
ast_trace(-1, "%s: Using new stream %s\n", ast_sip_session_get_name(session),
ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
}
session_media = ast_sip_session_media_state_add(session, session->pending_media_state, ast_media_type_from_str(media), i);
if (!session_media) {
SCOPE_EXIT_LOG_EXPR(goto end, LOG_ERROR, "%s: Couldn't alloc session media\n",
ast_sip_session_get_name(session));
}
/* If this stream is already declined mark it as such, or mark it as such if we've reached the limit */
if (!remote_stream->desc.port || is_stream_limitation_reached(type, session->endpoint, type_streams)) {
remove_stream_from_bundle(session_media, stream);
SCOPE_EXIT_EXPR(continue, "%s: Declining incoming SDP media stream %s'\n",
ast_sip_session_get_name(session), ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
}
set_mid_and_bundle_group(session, session_media, sdp, remote_stream);
set_remote_mslabel_and_stream_group(session, session_media, sdp, remote_stream, stream);
if (session_media->handler) {
handler = session_media->handler;
ast_trace(-1, "%s: Negotiating incoming SDP media stream %s using %s SDP handler\n",
ast_sip_session_get_name(session), ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)),
session_media->handler->id);
res = handler->negotiate_incoming_sdp_stream(session, session_media, sdp, i, stream);
if (res < 0) {
/* Catastrophic failure. Abort! */
SCOPE_EXIT_LOG_EXPR(goto end, LOG_ERROR, "%s: Couldn't negotiate stream %s\n",
ast_sip_session_get_name(session), ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
} else if (res == 0) {
remove_stream_from_bundle(session_media, stream);
SCOPE_EXIT_EXPR(continue, "%s: Declining incoming SDP media stream %s\n",
ast_sip_session_get_name(session), ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
} else if (res > 0) {
handled = 1;
++type_streams[type];
/* Handled by this handler. Move to the next stream */
SCOPE_EXIT_EXPR(continue, "%s: Media stream %s handled by %s\n",
ast_sip_session_get_name(session), ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)),
session_media->handler->id);
}
}
handler_list = ao2_find(sdp_handlers, media, OBJ_KEY);
if (!handler_list) {
SCOPE_EXIT_EXPR(continue, "%s: Media stream %s has no registered handlers\n",
ast_sip_session_get_name(session), ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
}
AST_LIST_TRAVERSE(&handler_list->list, handler, next) {
if (handler == session_media->handler) {
continue;
}
ast_trace(-1, "%s: Negotiating incoming SDP media stream %s using %s SDP handler\n",
ast_sip_session_get_name(session), ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)),
handler->id);
res = handler->negotiate_incoming_sdp_stream(session, session_media, sdp, i, stream);
if (res < 0) {
/* Catastrophic failure. Abort! */
handled = 0;
SCOPE_EXIT_LOG_EXPR(goto end, LOG_ERROR, "%s: Couldn't negotiate stream %s\n",
ast_sip_session_get_name(session), ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
} else if (res == 0) {
remove_stream_from_bundle(session_media, stream);
ast_trace(-1, "%s: Declining incoming SDP media stream %s\n",
ast_sip_session_get_name(session), ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
continue;
} else if (res > 0) {
session_media_set_handler(session_media, handler);
handled = 1;
++type_streams[type];
ast_trace(-1, "%s: Media stream %s handled by %s\n",
ast_sip_session_get_name(session), ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)),
session_media->handler->id);
break;
}
}
SCOPE_EXIT("%s: Done with stream %s\n", ast_sip_session_get_name(session),
ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
}
end:
SCOPE_EXIT_RTN_VALUE(handled ? 0 : -1, "%s: Handled? %s\n", ast_sip_session_get_name(session),
handled ? "yes" : "no");
}
static int handle_negotiated_sdp_session_media(struct ast_sip_session_media *session_media,
struct ast_sip_session *session, const pjmedia_sdp_session *local,
const pjmedia_sdp_session *remote, int index, struct ast_stream *asterisk_stream)
{
/* See if there are registered handlers for this media stream type */
struct pjmedia_sdp_media *local_stream = local->media[index];
char media[20];
struct ast_sip_session_sdp_handler *handler;
RAII_VAR(struct sdp_handler_list *, handler_list, NULL, ao2_cleanup);
int res;
SCOPE_ENTER(1, "%s\n", session ? ast_sip_session_get_name(session) : "unknown");
/* We need a null-terminated version of the media string */
ast_copy_pj_str(media, &local->media[index]->desc.media, sizeof(media));
/* For backwards compatibility we only reflect the stream state correctly on
* the non-default streams and any non-audio streams. This is because the stream
* state of the default audio stream is also used for signaling that someone has
* placed us on hold. This situation is not handled currently and can result in
* the remote side being sorted of placed on hold too.
*/
if (!ast_sip_session_is_pending_stream_default(session, asterisk_stream) || strcmp(media, "audio")) {
/* Determine the state of the stream based on our local SDP */
if (pjmedia_sdp_media_find_attr2(local_stream, "sendonly", NULL)) {
ast_stream_set_state(asterisk_stream, AST_STREAM_STATE_SENDONLY);
} else if (pjmedia_sdp_media_find_attr2(local_stream, "recvonly", NULL)) {
ast_stream_set_state(asterisk_stream, AST_STREAM_STATE_RECVONLY);
} else if (pjmedia_sdp_media_find_attr2(local_stream, "inactive", NULL)) {
ast_stream_set_state(asterisk_stream, AST_STREAM_STATE_INACTIVE);
} else {
ast_stream_set_state(asterisk_stream, AST_STREAM_STATE_SENDRECV);
}
} else {
ast_stream_set_state(asterisk_stream, AST_STREAM_STATE_SENDRECV);
}
set_mid_and_bundle_group(session, session_media, remote, remote->media[index]);
set_remote_mslabel_and_stream_group(session, session_media, remote, remote->media[index], asterisk_stream);
handler = session_media->handler;
if (handler) {
ast_debug(4, "%s: Applying negotiated SDP media stream '%s' using %s SDP handler\n",
ast_sip_session_get_name(session), ast_codec_media_type2str(session_media->type),
handler->id);
res = handler->apply_negotiated_sdp_stream(session, session_media, local, remote, index, asterisk_stream);
if (res >= 0) {
ast_debug(4, "%s: Applied negotiated SDP media stream '%s' using %s SDP handler\n",
ast_sip_session_get_name(session), ast_codec_media_type2str(session_media->type),
handler->id);
SCOPE_EXIT_RTN_VALUE(0, "%s: Applied negotiated SDP media stream '%s' using %s SDP handler\n",
ast_sip_session_get_name(session), ast_codec_media_type2str(session_media->type),
handler->id);
}
SCOPE_EXIT_RTN_VALUE(-1, "%s: Failed to apply negotiated SDP media stream '%s' using %s SDP handler\n",
ast_sip_session_get_name(session), ast_codec_media_type2str(session_media->type),
handler->id);
}
handler_list = ao2_find(sdp_handlers, media, OBJ_KEY);
if (!handler_list) {
ast_debug(4, "%s: No registered SDP handlers for media type '%s'\n", ast_sip_session_get_name(session), media);
return -1;
}
AST_LIST_TRAVERSE(&handler_list->list, handler, next) {
if (handler == session_media->handler) {
continue;
}
ast_debug(4, "%s: Applying negotiated SDP media stream '%s' using %s SDP handler\n",
ast_sip_session_get_name(session), ast_codec_media_type2str(session_media->type),
handler->id);
res = handler->apply_negotiated_sdp_stream(session, session_media, local, remote, index, asterisk_stream);
if (res < 0) {
/* Catastrophic failure. Abort! */
SCOPE_EXIT_RTN_VALUE(-1, "%s: Handler '%s' returned %d\n",
ast_sip_session_get_name(session), handler->id, res);
}
if (res > 0) {
ast_debug(4, "%s: Applied negotiated SDP media stream '%s' using %s SDP handler\n",
ast_sip_session_get_name(session), ast_codec_media_type2str(session_media->type),
handler->id);
/* Handled by this handler. Move to the next stream */
session_media_set_handler(session_media, handler);
SCOPE_EXIT_RTN_VALUE(0, "%s: Handler '%s' handled this sdp stream\n",
ast_sip_session_get_name(session), handler->id);
}
}
res = 0;
if (session_media->handler && session_media->handler->stream_stop) {
ast_debug(4, "%s: Stopping SDP media stream '%s' as it is not currently negotiated\n",
ast_sip_session_get_name(session), ast_codec_media_type2str(session_media->type));
session_media->handler->stream_stop(session_media);
}
SCOPE_EXIT_RTN_VALUE(0, "%s: Media type '%s' %s\n",
ast_sip_session_get_name(session), ast_codec_media_type2str(session_media->type),
res ? "not negotiated. Stopped" : "handled");
}
static int handle_negotiated_sdp(struct ast_sip_session *session, const pjmedia_sdp_session *local, const pjmedia_sdp_session *remote)
{
int i;
struct ast_stream_topology *topology;
unsigned int changed = 0; /* 0 = unchanged, 1 = new source, 2 = new topology */
SCOPE_ENTER(1, "%s\n", ast_sip_session_get_name(session));
if (!session->pending_media_state->topology) {
if (session->active_media_state->topology) {
/*
* This happens when we have negotiated media after receiving a 183,
* and we're now receiving a 200 with a new SDP. In this case, there
* is active_media_state, but the pending_media_state has been reset.
*/
struct ast_sip_session_media_state *active_media_state_clone;
active_media_state_clone =
ast_sip_session_media_state_clone(session->active_media_state);
if (!active_media_state_clone) {
ast_log(LOG_WARNING, "%s: Unable to clone active media state\n",
ast_sip_session_get_name(session));
return -1;
}
ast_sip_session_media_state_free(session->pending_media_state);
session->pending_media_state = active_media_state_clone;
} else {
ast_log(LOG_WARNING, "%s: No pending or active media state\n",
ast_sip_session_get_name(session));
return -1;
}
}
/* If we're handling negotiated streams, then we should already have set
* up session media instances (and Asterisk streams) that correspond to
* the local SDP, and there should be the same number of session medias
* and streams as there are local SDP streams
*/
if (ast_stream_topology_get_count(session->pending_media_state->topology) != local->media_count
|| AST_VECTOR_SIZE(&session->pending_media_state->sessions) != local->media_count) {
ast_log(LOG_WARNING, "%s: Local SDP contains %d media streams while we expected it to contain %u\n",
ast_sip_session_get_name(session),
ast_stream_topology_get_count(session->pending_media_state->topology), local->media_count);
SCOPE_EXIT_RTN_VALUE(-1, "Media stream count mismatch\n");
}
AST_VECTOR_RESET(&session->pending_media_state->read_callbacks, AST_VECTOR_ELEM_CLEANUP_NOOP);
for (i = 0; i < local->media_count; ++i) {
struct ast_sip_session_media *session_media;
struct ast_stream *stream;
if (!remote->media[i]) {
continue;
}
session_media = AST_VECTOR_GET(&session->pending_media_state->sessions, i);
stream = ast_stream_topology_get_stream(session->pending_media_state->topology, i);
/* Make sure that this stream is in the correct state. If we need to change
* the state to REMOVED, then our work here is done, so go ahead and move on
* to the next stream.
*/
if (!remote->media[i]->desc.port) {
ast_stream_set_state(stream, AST_STREAM_STATE_REMOVED);
continue;
}
/* If the stream state is REMOVED, nothing needs to be done, so move on to the
* next stream. This can occur if an internal thing has requested it to be
* removed, or if we remove it as a result of the stream limit being reached.
*/
if (ast_stream_get_state(stream) == AST_STREAM_STATE_REMOVED) {
/*
* Defer removing the handler until we are ready to activate
* the new topology. The channel's thread may still be using
* the stream and we could crash before we are ready.
*/
continue;
}
if (handle_negotiated_sdp_session_media(session_media, session, local, remote, i, stream)) {
SCOPE_EXIT_RTN_VALUE(-1, "Unable to handle negotiated session media\n");
}
changed |= session_media->changed;
session_media->changed = 0;
}
/* Apply the pending media state to the channel and make it active */
ast_channel_lock(session->channel);
/* Now update the stream handler for any declined/removed streams */
for (i = 0; i < local->media_count; ++i) {
struct ast_sip_session_media *session_media;
struct ast_stream *stream;
if (!remote->media[i]) {
continue;
}
session_media = AST_VECTOR_GET(&session->pending_media_state->sessions, i);
stream = ast_stream_topology_get_stream(session->pending_media_state->topology, i);
if (ast_stream_get_state(stream) == AST_STREAM_STATE_REMOVED
&& session_media->handler) {
/*
* This stream is no longer being used and the channel's thread
* is held off because we have the channel lock so release any
* resources the handler may have on it.
*/
session_media_set_handler(session_media, NULL);
}
}
/* Update the topology on the channel to match the accepted one */
topology = ast_stream_topology_clone(session->pending_media_state->topology);
if (topology) {
ast_channel_set_stream_topology(session->channel, topology);
/* If this is a remotely done renegotiation that has changed the stream topology notify what is
* currently handling this channel. Note that fax uses its own process, so if we are transitioning
* between audio and fax or vice versa we don't notify.
*/
if (pjmedia_sdp_neg_was_answer_remote(session->inv_session->neg) == PJ_FALSE &&
session->active_media_state && session->active_media_state->topology &&
!ast_stream_topology_equal(session->active_media_state->topology, topology) &&
!session->active_media_state->default_session[AST_MEDIA_TYPE_IMAGE] &&
!session->pending_media_state->default_session[AST_MEDIA_TYPE_IMAGE]) {
changed = 2;
}
}
/* Remove all current file descriptors from the channel */
for (i = 0; i < AST_VECTOR_SIZE(&session->active_media_state->read_callbacks); ++i) {
ast_channel_internal_fd_clear(session->channel, i + AST_EXTENDED_FDS);
}
/* Add all the file descriptors from the pending media state */
for (i = 0; i < AST_VECTOR_SIZE(&session->pending_media_state->read_callbacks); ++i) {
struct ast_sip_session_media_read_callback_state *callback_state;
callback_state = AST_VECTOR_GET_ADDR(&session->pending_media_state->read_callbacks, i);
ast_channel_internal_fd_set(session->channel, i + AST_EXTENDED_FDS, callback_state->fd);
}
/* Active and pending flip flop as needed */
ast_sip_session_media_stats_save(session, session->active_media_state);
SWAP(session->active_media_state, session->pending_media_state);
ast_sip_session_media_state_reset(session->pending_media_state);
ast_channel_unlock(session->channel);
if (changed == 1) {
struct ast_frame f = { AST_FRAME_CONTROL, .subclass.integer = AST_CONTROL_STREAM_TOPOLOGY_SOURCE_CHANGED };
ast_queue_frame(session->channel, &f);
} else if (changed == 2) {
ast_channel_stream_topology_changed_externally(session->channel);
} else {
ast_queue_frame(session->channel, &ast_null_frame);
}
SCOPE_EXIT_RTN_VALUE(0);
}
#define DATASTORE_BUCKETS 53
#define MEDIA_BUCKETS 7
static void session_datastore_destroy(void *obj)
{
struct ast_datastore *datastore = obj;
/* Using the destroy function (if present) destroy the data */
if (datastore->info->destroy != NULL && datastore->data != NULL) {
datastore->info->destroy(datastore->data);
datastore->data = NULL;
}
ast_free((void *) datastore->uid);
datastore->uid = NULL;
}
struct ast_datastore *ast_sip_session_alloc_datastore(const struct ast_datastore_info *info, const char *uid)
{
RAII_VAR(struct ast_datastore *, datastore, NULL, ao2_cleanup);
char uuid_buf[AST_UUID_STR_LEN];
const char *uid_ptr = uid;
if (!info) {
return NULL;
}
datastore = ao2_alloc(sizeof(*datastore), session_datastore_destroy);
if (!datastore) {
return NULL;
}
datastore->info = info;
if (ast_strlen_zero(uid)) {
/* They didn't provide an ID so we'll provide one ourself */
uid_ptr = ast_uuid_generate_str(uuid_buf, sizeof(uuid_buf));
}
datastore->uid = ast_strdup(uid_ptr);
if (!datastore->uid) {
return NULL;
}
ao2_ref(datastore, +1);
return datastore;
}
int ast_sip_session_add_datastore(struct ast_sip_session *session, struct ast_datastore *datastore)
{
ast_assert(datastore != NULL);
ast_assert(datastore->info != NULL);
ast_assert(ast_strlen_zero(datastore->uid) == 0);
if (!ao2_link(session->datastores, datastore)) {
return -1;
}
return 0;
}
struct ast_datastore *ast_sip_session_get_datastore(struct ast_sip_session *session, const char *name)
{
return ao2_find(session->datastores, name, OBJ_KEY);
}
void ast_sip_session_remove_datastore(struct ast_sip_session *session, const char *name)
{
ao2_callback(session->datastores, OBJ_KEY | OBJ_UNLINK | OBJ_NODATA, NULL, (void *) name);
}
enum delayed_method {
DELAYED_METHOD_INVITE,
DELAYED_METHOD_UPDATE,
DELAYED_METHOD_BYE,
};
/*!
* \internal
* \brief Convert delayed method enum value to a string.
* \since 13.3.0
*
* \param method Delayed method enum value to convert to a string.
*
* \return String value of delayed method.
*/
static const char *delayed_method2str(enum delayed_method method)
{
const char *str = "<unknown>";
switch (method) {
case DELAYED_METHOD_INVITE:
str = "INVITE";
break;
case DELAYED_METHOD_UPDATE:
str = "UPDATE";
break;
case DELAYED_METHOD_BYE:
str = "BYE";
break;
}
return str;
}
/*!
* \brief Structure used for sending delayed requests
*
* Requests are typically delayed because the current transaction
* state of an INVITE. Once the pending INVITE transaction terminates,
* the delayed request will be sent
*/
struct ast_sip_session_delayed_request {
/*! Method of the request */
enum delayed_method method;
/*! Callback to call when the delayed request is created. */
ast_sip_session_request_creation_cb on_request_creation;
/*! Callback to call when the delayed request SDP is created */
ast_sip_session_sdp_creation_cb on_sdp_creation;
/*! Callback to call when the delayed request receives a response */
ast_sip_session_response_cb on_response;
/*! Whether to generate new SDP */
int generate_new_sdp;
/*! Requested media state for the SDP */
struct ast_sip_session_media_state *pending_media_state;
/*! Active media state at the time of the original request */
struct ast_sip_session_media_state *active_media_state;
AST_LIST_ENTRY(ast_sip_session_delayed_request) next;
};
static struct ast_sip_session_delayed_request *delayed_request_alloc(
enum delayed_method method,
ast_sip_session_request_creation_cb on_request_creation,
ast_sip_session_sdp_creation_cb on_sdp_creation,
ast_sip_session_response_cb on_response,
int generate_new_sdp,
struct ast_sip_session_media_state *pending_media_state,
struct ast_sip_session_media_state *active_media_state)
{
struct ast_sip_session_delayed_request *delay = ast_calloc(1, sizeof(*delay));
if (!delay) {
return NULL;
}
delay->method = method;
delay->on_request_creation = on_request_creation;
delay->on_sdp_creation = on_sdp_creation;
delay->on_response = on_response;
delay->generate_new_sdp = generate_new_sdp;
delay->pending_media_state = pending_media_state;
delay->active_media_state = active_media_state;
return delay;
}
static void delayed_request_free(struct ast_sip_session_delayed_request *delay)
{
ast_sip_session_media_state_free(delay->pending_media_state);
ast_sip_session_media_state_free(delay->active_media_state);
ast_free(delay);
}
/*!
* \internal
* \brief Send a delayed request
*
* \retval -1 failure
* \retval 0 success
* \retval 1 refresh request not sent as no change would occur
*/
static int send_delayed_request(struct ast_sip_session *session, struct ast_sip_session_delayed_request *delay)
{
int res;
SCOPE_ENTER(3, "%s: sending delayed %s request\n",
ast_sip_session_get_name(session),
delayed_method2str(delay->method));
switch (delay->method) {
case DELAYED_METHOD_INVITE:
res = sip_session_refresh(session, delay->on_request_creation,
delay->on_sdp_creation, delay->on_response,
AST_SIP_SESSION_REFRESH_METHOD_INVITE, delay->generate_new_sdp, delay->pending_media_state,
delay->active_media_state, 1);
/* Ownership of media state transitions to ast_sip_session_refresh */
delay->pending_media_state = NULL;
delay->active_media_state = NULL;
SCOPE_EXIT_RTN_VALUE(res, "%s\n", ast_sip_session_get_name(session));
case DELAYED_METHOD_UPDATE:
res = sip_session_refresh(session, delay->on_request_creation,
delay->on_sdp_creation, delay->on_response,
AST_SIP_SESSION_REFRESH_METHOD_UPDATE, delay->generate_new_sdp, delay->pending_media_state,
delay->active_media_state, 1);
/* Ownership of media state transitions to ast_sip_session_refresh */
delay->pending_media_state = NULL;
delay->active_media_state = NULL;
SCOPE_EXIT_RTN_VALUE(res, "%s\n", ast_sip_session_get_name(session));
case DELAYED_METHOD_BYE:
ast_sip_session_terminate(session, 0);
SCOPE_EXIT_RTN_VALUE(0, "%s: Terminating session on delayed BYE\n", ast_sip_session_get_name(session));
}
SCOPE_EXIT_LOG_RTN_VALUE(-1, LOG_WARNING, "%s: Don't know how to send delayed %s(%d) request.\n",
ast_sip_session_get_name(session),
delayed_method2str(delay->method), delay->method);
}
/*!
* \internal
* \brief The current INVITE transaction is in the PROCEEDING state.
* \since 13.3.0
*
* \param vsession Session object.
*
* \retval 0 on success.
* \retval -1 on error.
*/
static int invite_proceeding(void *vsession)
{
struct ast_sip_session *session = vsession;
struct ast_sip_session_delayed_request *delay;
int found = 0;
int res = 0;
SCOPE_ENTER(3, "%s\n", ast_sip_session_get_name(session));
AST_LIST_TRAVERSE_SAFE_BEGIN(&session->delayed_requests, delay, next) {
switch (delay->method) {
case DELAYED_METHOD_INVITE:
break;
case DELAYED_METHOD_UPDATE:
AST_LIST_REMOVE_CURRENT(next);
ast_trace(-1, "%s: Sending delayed %s request\n", ast_sip_session_get_name(session),
delayed_method2str(delay->method));
res = send_delayed_request(session, delay);
delayed_request_free(delay);
if (!res) {
found = 1;
}
break;
case DELAYED_METHOD_BYE:
/* A BYE is pending so don't bother anymore. */
found = 1;
break;
}
if (found) {
break;
}
}
AST_LIST_TRAVERSE_SAFE_END;
ao2_ref(session, -1);
SCOPE_EXIT_RTN_VALUE(res, "%s\n", ast_sip_session_get_name(session));
}
/*!
* \internal
* \brief The current INVITE transaction is in the TERMINATED state.
* \since 13.3.0
*
* \param vsession Session object.
*
* \retval 0 on success.
* \retval -1 on error.
*/
static int invite_terminated(void *vsession)
{
struct ast_sip_session *session = vsession;
struct ast_sip_session_delayed_request *delay;
int found = 0;
int res = 0;
int timer_running;
SCOPE_ENTER(3, "%s\n", ast_sip_session_get_name(session));
/* re-INVITE collision timer running? */
timer_running = pj_timer_entry_running(&session->rescheduled_reinvite);
AST_LIST_TRAVERSE_SAFE_BEGIN(&session->delayed_requests, delay, next) {
switch (delay->method) {
case DELAYED_METHOD_INVITE:
if (!timer_running) {
found = 1;
}
break;
case DELAYED_METHOD_UPDATE:
case DELAYED_METHOD_BYE:
found = 1;
break;
}
if (found) {
AST_LIST_REMOVE_CURRENT(next);
ast_trace(-1, "%s: Sending delayed %s request\n", ast_sip_session_get_name(session),
delayed_method2str(delay->method));
res = send_delayed_request(session, delay);
delayed_request_free(delay);
if (!res) {
break;
}
}
}
AST_LIST_TRAVERSE_SAFE_END;
ao2_ref(session, -1);
SCOPE_EXIT_RTN_VALUE(res, "%s\n", ast_sip_session_get_name(session));
}
/*!
* \internal
* \brief INVITE collision timeout.
* \since 13.3.0
*
* \param vsession Session object.
*
* \retval 0 on success.
* \retval -1 on error.
*/
static int invite_collision_timeout(void *vsession)
{
struct ast_sip_session *session = vsession;
int res;
SCOPE_ENTER(3, "%s\n", ast_sip_session_get_name(session));
if (session->inv_session->invite_tsx) {
/*
* INVITE transaction still active. Let it send
* the collision re-INVITE when it terminates.
*/
ao2_ref(session, -1);
res = 0;
} else {
res = invite_terminated(session);
}
SCOPE_EXIT_RTN_VALUE(res, "%s\n", ast_sip_session_get_name(session));
}
/*!
* \internal
* \brief The current UPDATE transaction is in the COMPLETED state.
* \since 13.3.0
*
* \param vsession Session object.
*
* \retval 0 on success.
* \retval -1 on error.
*/
static int update_completed(void *vsession)
{
struct ast_sip_session *session = vsession;
int res;
if (session->inv_session->invite_tsx) {
res = invite_proceeding(session);
} else {
res = invite_terminated(session);
}
return res;
}
static void check_delayed_requests(struct ast_sip_session *session,
int (*cb)(void *vsession))
{
ao2_ref(session, +1);
if (ast_sip_push_task(session->serializer, cb, session)) {
ao2_ref(session, -1);
}
}
static int delay_request(struct ast_sip_session *session,
ast_sip_session_request_creation_cb on_request,
ast_sip_session_sdp_creation_cb on_sdp_creation,
ast_sip_session_response_cb on_response,
int generate_new_sdp,
enum delayed_method method,
struct ast_sip_session_media_state *pending_media_state,
struct ast_sip_session_media_state *active_media_state,
int queue_head)
{
struct ast_sip_session_delayed_request *delay = delayed_request_alloc(method,
on_request, on_sdp_creation, on_response, generate_new_sdp, pending_media_state,
active_media_state);
SCOPE_ENTER(3, "%s\n", ast_sip_session_get_name(session));
if (!delay) {
ast_sip_session_media_state_free(pending_media_state);
ast_sip_session_media_state_free(active_media_state);
SCOPE_EXIT_LOG_RTN_VALUE(-1, LOG_ERROR, "Unable to allocate delay request\n");
}
if (method == DELAYED_METHOD_BYE || queue_head) {
/* Send BYE as early as possible */
AST_LIST_INSERT_HEAD(&session->delayed_requests, delay, next);
} else {
AST_LIST_INSERT_TAIL(&session->delayed_requests, delay, next);
}
SCOPE_EXIT_RTN_VALUE(0);
}
static pjmedia_sdp_session *generate_session_refresh_sdp(struct ast_sip_session *session)
{
pjsip_inv_session *inv_session = session->inv_session;
const pjmedia_sdp_session *previous_sdp = NULL;
SCOPE_ENTER(3, "%s\n", ast_sip_session_get_name(session));
if (inv_session->neg) {
if (pjmedia_sdp_neg_was_answer_remote(inv_session->neg)) {
pjmedia_sdp_neg_get_active_remote(inv_session->neg, &previous_sdp);
} else {
pjmedia_sdp_neg_get_active_local(inv_session->neg, &previous_sdp);
}
}
SCOPE_EXIT_RTN_VALUE(create_local_sdp(inv_session, session, previous_sdp, 0));
}
static void set_from_header(struct ast_sip_session *session)
{
struct ast_party_id effective_id;
struct ast_party_id connected_id;
pj_pool_t *dlg_pool;
pjsip_fromto_hdr *dlg_info;
pjsip_contact_hdr *dlg_contact;
pjsip_name_addr *dlg_info_name_addr;
pjsip_sip_uri *dlg_info_uri;
pjsip_sip_uri *dlg_contact_uri;
int restricted;
const char *pjsip_from_domain;
if (!session->channel || session->saved_from_hdr) {
return;
}
/* We need to save off connected_id for RPID/PAI generation */
ast_party_id_init(&connected_id);
ast_channel_lock(session->channel);
effective_id = ast_channel_connected_effective_id(session->channel);
ast_party_id_copy(&connected_id, &effective_id);
ast_channel_unlock(session->channel);
restricted =
((ast_party_id_presentation(&connected_id) & AST_PRES_RESTRICTION) != AST_PRES_ALLOWED);
/* Now set up dlg->local.info so pjsip can correctly generate From */
dlg_pool = session->inv_session->dlg->pool;
dlg_info = session->inv_session->dlg->local.info;
dlg_contact = session->inv_session->dlg->local.contact;
dlg_info_name_addr = (pjsip_name_addr *) dlg_info->uri;
dlg_info_uri = pjsip_uri_get_uri(dlg_info_name_addr);
dlg_contact_uri = (pjsip_sip_uri*)pjsip_uri_get_uri(dlg_contact->uri);
if (session->endpoint->id.trust_outbound || !restricted) {
ast_sip_modify_id_header(dlg_pool, dlg_info, &connected_id);
if (ast_sip_get_use_callerid_contact() && ast_strlen_zero(session->endpoint->contact_user)) {
pj_strdup2(dlg_pool, &dlg_contact_uri->user, S_COR(connected_id.number.valid, connected_id.number.str, ""));
}
}
ast_party_id_free(&connected_id);
if (!ast_strlen_zero(session->endpoint->fromuser)) {
dlg_info_name_addr->display.ptr = NULL;
dlg_info_name_addr->display.slen = 0;
pj_strdup2(dlg_pool, &dlg_info_uri->user, session->endpoint->fromuser);
}
if (!ast_strlen_zero(session->endpoint->fromdomain)) {
pj_strdup2(dlg_pool, &dlg_info_uri->host, session->endpoint->fromdomain);
}
/*
* Channel variable for compatibility with chan_sip SIPFROMDOMAIN
*/
ast_channel_lock(session->channel);
pjsip_from_domain = pbx_builtin_getvar_helper(session->channel, "SIPFROMDOMAIN");
if (!ast_strlen_zero(pjsip_from_domain)) {
ast_debug(3, "%s: From header domain reset by channel variable SIPFROMDOMAIN (%s)\n",
ast_sip_session_get_name(session), pjsip_from_domain);
pj_strdup2(dlg_pool, &dlg_info_uri->host, pjsip_from_domain);
}
ast_channel_unlock(session->channel);
/* We need to save off the non-anonymized From for RPID/PAI generation (for domain) */
session->saved_from_hdr = pjsip_hdr_clone(dlg_pool, dlg_info);
ast_sip_add_usereqphone(session->endpoint, dlg_pool, session->saved_from_hdr->uri);
/* In chan_sip, fromuser and fromdomain trump restricted so we only
* anonymize if they're not set.
*/
if (restricted) {
/* fromuser doesn't provide a display name so we always set it */
pj_strdup2(dlg_pool, &dlg_info_name_addr->display, "Anonymous");
if (ast_strlen_zero(session->endpoint->fromuser)) {
pj_strdup2(dlg_pool, &dlg_info_uri->user, "anonymous");
}
if (ast_sip_get_use_callerid_contact() && ast_strlen_zero(session->endpoint->contact_user)) {
pj_strdup2(dlg_pool, &dlg_contact_uri->user, "anonymous");
}
if (ast_strlen_zero(session->endpoint->fromdomain)) {
pj_strdup2(dlg_pool, &dlg_info_uri->host, "anonymous.invalid");
}
} else {
ast_sip_add_usereqphone(session->endpoint, dlg_pool, dlg_info->uri);
}
}
/*
* Helper macros for merging and validating media states
*/
#define STREAM_REMOVED(_stream) (ast_stream_get_state(_stream) == AST_STREAM_STATE_REMOVED)
#define STATE_REMOVED(_stream_state) (_stream_state == AST_STREAM_STATE_REMOVED)
#define STATE_NONE(_stream_state) (_stream_state == AST_STREAM_STATE_END)
#define GET_STREAM_SAFE(_topology, _i) (_i < ast_stream_topology_get_count(_topology) ? ast_stream_topology_get_stream(_topology, _i) : NULL)
#define GET_STREAM_STATE_SAFE(_stream) (_stream ? ast_stream_get_state(_stream) : AST_STREAM_STATE_END)
#define GET_STREAM_NAME_SAFE(_stream) (_stream ? ast_stream_get_name(_stream) : "")
/*!
* \internal
* \brief Validate a media state
*
* \param session_name For log messages
* \param state Media state
*
* \retval 1 The media state is valid
* \retval 0 The media state is NOT valid
*
*/
static int is_media_state_valid(const char *session_name, struct ast_sip_session_media_state *state)
{
int stream_count = ast_stream_topology_get_count(state->topology);
int session_count = AST_VECTOR_SIZE(&state->sessions);
int i;
int res = 0;
SCOPE_ENTER(3, "%s: Topology: %s\n", session_name,
ast_str_tmp(256, ast_stream_topology_to_str(state->topology, &STR_TMP)));
if (session_count != stream_count) {
SCOPE_EXIT_RTN_VALUE(0, "%s: %d media sessions but %d streams\n", session_name,
session_count, stream_count);
}
for (i = 0; i < stream_count; i++) {
struct ast_sip_session_media *media = NULL;
struct ast_stream *stream = ast_stream_topology_get_stream(state->topology, i);
const char *stream_name = NULL;
int j;
SCOPE_ENTER(4, "%s: Checking stream %s\n", session_name, ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
if (!stream) {
SCOPE_EXIT_EXPR(goto end, "%s: stream %d is null\n", session_name, i);
}
stream_name = ast_stream_get_name(stream);
for (j = 0; j < stream_count; j++) {
struct ast_stream *possible_dup = ast_stream_topology_get_stream(state->topology, j);
if (j == i || !possible_dup) {
continue;
}
if (!STREAM_REMOVED(stream) && ast_strings_equal(stream_name, GET_STREAM_NAME_SAFE(possible_dup))) {
SCOPE_EXIT_EXPR(goto end, "%s: stream %i %s is duplicated to %d\n", session_name,
i, stream_name, j);
}
}
media = AST_VECTOR_GET(&state->sessions, i);
if (!media) {
SCOPE_EXIT_EXPR(continue, "%s: media %d is null\n", session_name, i);
}
for (j = 0; j < session_count; j++) {
struct ast_sip_session_media *possible_dup = AST_VECTOR_GET(&state->sessions, j);
if (j == i || !possible_dup) {
continue;
}
if (!ast_strlen_zero(media->label) && !ast_strlen_zero(possible_dup->label)
&& ast_strings_equal(media->label, possible_dup->label)) {
SCOPE_EXIT_EXPR(goto end, "%s: media %d %s is duplicated to %d\n", session_name,
i, media->label, j);
}
}
if (media->stream_num != i) {
SCOPE_EXIT_EXPR(goto end, "%s: media %d has stream_num %d\n", session_name,
i, media->stream_num);
}
if (media->type != ast_stream_get_type(stream)) {
SCOPE_EXIT_EXPR(goto end, "%s: media %d has type %s but stream has type %s\n", stream_name,
i, ast_codec_media_type2str(media->type), ast_codec_media_type2str(ast_stream_get_type(stream)));
}
SCOPE_EXIT("%s: Done with stream %s\n", session_name, ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
}
res = 1;
end:
SCOPE_EXIT_RTN_VALUE(res, "%s: %s\n", session_name, res ? "Valid" : "NOT Valid");
}
/*!
* \internal
* \brief Merge media states for a delayed session refresh
*
* \param session_name For log messages
* \param delayed_pending_state The pending media state at the time the resuest was queued
* \param delayed_active_state The active media state at the time the resuest was queued
* \param current_active_state The current active media state
* \param run_post_validation Whether to run validation on the resulting media state or not
*
* \returns New merged topology or NULL if there's an error
*
*/
static struct ast_sip_session_media_state *resolve_refresh_media_states(
const char *session_name,
struct ast_sip_session_media_state *delayed_pending_state,
struct ast_sip_session_media_state *delayed_active_state,
struct ast_sip_session_media_state *current_active_state,
int run_post_validation)
{
RAII_VAR(struct ast_sip_session_media_state *, new_pending_state, NULL, ast_sip_session_media_state_free);
struct ast_sip_session_media_state *returned_media_state = NULL;
struct ast_stream_topology *delayed_pending = delayed_pending_state->topology;
struct ast_stream_topology *delayed_active = delayed_active_state->topology;
struct ast_stream_topology *current_active = current_active_state->topology;
struct ast_stream_topology *new_pending = NULL;
int i;
int max_stream_count;
int res;
SCOPE_ENTER(2, "%s: DP: %s DA: %s CA: %s\n", session_name,
ast_str_tmp(256, ast_stream_topology_to_str(delayed_pending, &STR_TMP)),
ast_str_tmp(256, ast_stream_topology_to_str(delayed_active, &STR_TMP)),
ast_str_tmp(256, ast_stream_topology_to_str(current_active, &STR_TMP))
);
max_stream_count = MAX(ast_stream_topology_get_count(delayed_pending),
ast_stream_topology_get_count(delayed_active));
max_stream_count = MAX(max_stream_count, ast_stream_topology_get_count(current_active));
/*
* The new_pending_state is always based on the currently negotiated state because
* the stream ordering in its topology must be preserved.
*/
new_pending_state = ast_sip_session_media_state_clone(current_active_state);
if (!new_pending_state) {
SCOPE_EXIT_LOG_RTN_VALUE(NULL, LOG_ERROR, "%s: Couldn't clone current_active_state to new_pending_state\n", session_name);
}
new_pending = new_pending_state->topology;
for (i = 0; i < max_stream_count; i++) {
struct ast_stream *dp_stream = GET_STREAM_SAFE(delayed_pending, i);
struct ast_stream *da_stream = GET_STREAM_SAFE(delayed_active, i);
struct ast_stream *ca_stream = GET_STREAM_SAFE(current_active, i);
struct ast_stream *np_stream = GET_STREAM_SAFE(new_pending, i);
struct ast_stream *found_da_stream = NULL;
struct ast_stream *found_np_stream = NULL;
enum ast_stream_state dp_state = GET_STREAM_STATE_SAFE(dp_stream);
enum ast_stream_state da_state = GET_STREAM_STATE_SAFE(da_stream);
enum ast_stream_state ca_state = GET_STREAM_STATE_SAFE(ca_stream);
enum ast_stream_state np_state = GET_STREAM_STATE_SAFE(np_stream);
enum ast_stream_state found_da_state = AST_STREAM_STATE_END;
enum ast_stream_state found_np_state = AST_STREAM_STATE_END;
const char *da_name = GET_STREAM_NAME_SAFE(da_stream);
const char *dp_name = GET_STREAM_NAME_SAFE(dp_stream);
const char *ca_name = GET_STREAM_NAME_SAFE(ca_stream);
const char *np_name = GET_STREAM_NAME_SAFE(np_stream);
const char *found_da_name __attribute__((unused)) = "";
const char *found_np_name __attribute__((unused)) = "";
int found_da_slot __attribute__((unused)) = -1;
int found_np_slot = -1;
int removed_np_slot = -1;
int j;
SCOPE_ENTER(3, "%s: slot: %d DP: %s DA: %s CA: %s\n", session_name, i,
ast_str_tmp(128, ast_stream_to_str(dp_stream, &STR_TMP)),
ast_str_tmp(128, ast_stream_to_str(da_stream, &STR_TMP)),
ast_str_tmp(128, ast_stream_to_str(ca_stream, &STR_TMP)));
if (STATE_NONE(da_state) && STATE_NONE(dp_state) && STATE_NONE(ca_state)) {
SCOPE_EXIT_EXPR(break, "%s: All gone\n", session_name);
}
/*
* Simple cases are handled first to avoid having to search the NP and DA
* topologies for streams with the same name but not in the same position.
*/
if (STATE_NONE(dp_state) && !STATE_NONE(da_state)) {
/*
* The slot in the delayed pending topology can't be empty if the delayed
* active topology has a stream there. Streams can't just go away. They
* can be reused or marked "removed" but they can't go away.
*/
SCOPE_EXIT_LOG_RTN_VALUE(NULL, LOG_WARNING, "%s: DP slot is empty but DA is not\n", session_name);
}
if (STATE_NONE(dp_state)) {
/*
* The current active topology can certainly have streams that weren't
* in existence when the delayed request was queued. In this case,
* no action is needed since we already copied the current active topology
* to the new pending one.
*/
SCOPE_EXIT_EXPR(continue, "%s: No DP stream so use CA stream as is\n", session_name);
}
if (ast_strings_equal(dp_name, da_name) && ast_strings_equal(da_name, ca_name)) {
/*
* The delayed pending stream in this slot matches by name, the streams
* in the same slot in the other two topologies. Easy case.
*/
ast_trace(-1, "%s: Same stream in all 3 states\n", session_name);
if (dp_state == da_state && da_state == ca_state) {
/* All the same state, no need to update. */
SCOPE_EXIT_EXPR(continue, "%s: All in the same state so nothing to do\n", session_name);
}
if (da_state != ca_state) {
/*
* Something set the CA state between the time this request was queued
* and now. The CA state wins so we don't do anything.
*/
SCOPE_EXIT_EXPR(continue, "%s: Ignoring request to change state from %s to %s\n",
session_name, ast_stream_state2str(ca_state), ast_stream_state2str(dp_state));
}
if (dp_state != da_state) {
/* DP needs to update the state */
ast_stream_set_state(np_stream, dp_state);
SCOPE_EXIT_EXPR(continue, "%s: Changed NP stream state from %s to %s\n",
session_name, ast_stream_state2str(ca_state), ast_stream_state2str(dp_state));
}
}
/*
* We're done with the simple cases. For the rest, we need to identify if the
* DP stream we're trying to take action on is already in the other topologies
* possibly in a different slot. To do that, if the stream in the DA or CA slots
* doesn't match the current DP stream, we need to iterate over the topology
* looking for a stream with the same name.
*/
/*
* Since we already copied all of the CA streams to the NP topology, we'll use it
* instead of CA because we'll be updating the NP as we go.
*/
if (!ast_strings_equal(dp_name, np_name)) {
/*
* The NP stream in this slot doesn't have the same name as the DP stream
* so we need to see if it's in another NP slot. We're not going to stop
* when we find a matching stream because we also want to find the first
* removed removed slot, if any, so we can re-use this slot. We'll break
* early if we find both before we reach the end.
*/
ast_trace(-1, "%s: Checking if DP is already in NP somewhere\n", session_name);
for (j = 0; j < ast_stream_topology_get_count(new_pending); j++) {
struct ast_stream *possible_existing = ast_stream_topology_get_stream(new_pending, j);
const char *possible_existing_name = GET_STREAM_NAME_SAFE(possible_existing);
ast_trace(-1, "%s: Checking %s against %s\n", session_name, dp_name, possible_existing_name);
if (found_np_slot == -1 && ast_strings_equal(dp_name, possible_existing_name)) {
ast_trace(-1, "%s: Pending stream %s slot %d is in NP slot %d\n", session_name,
dp_name, i, j);
found_np_slot = j;
found_np_stream = possible_existing;
found_np_state = ast_stream_get_state(possible_existing);
found_np_name = ast_stream_get_name(possible_existing);
}
if (STREAM_REMOVED(possible_existing) && removed_np_slot == -1) {
removed_np_slot = j;
}
if (removed_np_slot >= 0 && found_np_slot >= 0) {
break;
}
}
} else {
/* Makes the subsequent code easier */
found_np_slot = i;
found_np_stream = np_stream;
found_np_state = np_state;
found_np_name = np_name;
}
if (!ast_strings_equal(dp_name, da_name)) {
/*
* The DA stream in this slot doesn't have the same name as the DP stream
* so we need to see if it's in another DA slot. In real life, the DA stream
* in this slot could have a different name but there shouldn't be a case
* where the DP stream is another slot in the DA topology. Just in case though.
* We don't care about removed slots in the DA topology.
*/
ast_trace(-1, "%s: Checking if DP is already in DA somewhere\n", session_name);
for (j = 0; j < ast_stream_topology_get_count(delayed_active); j++) {
struct ast_stream *possible_existing = ast_stream_topology_get_stream(delayed_active, j);
const char *possible_existing_name = GET_STREAM_NAME_SAFE(possible_existing);
ast_trace(-1, "%s: Checking %s against %s\n", session_name, dp_name, possible_existing_name);
if (ast_strings_equal(dp_name, possible_existing_name)) {
ast_trace(-1, "%s: Pending stream %s slot %d is already in delayed active slot %d\n",
session_name, dp_name, i, j);
found_da_slot = j;
found_da_stream = possible_existing;
found_da_state = ast_stream_get_state(possible_existing);
found_da_name = ast_stream_get_name(possible_existing);
break;
}
}
} else {
/* Makes the subsequent code easier */
found_da_slot = i;
found_da_stream = da_stream;
found_da_state = da_state;
found_da_name = da_name;
}
ast_trace(-1, "%s: Found NP slot: %d Found removed NP slot: %d Found DA slot: %d\n",
session_name, found_np_slot, removed_np_slot, found_da_slot);
/*
* Now we know whether the DP stream is new or changing state and we know if the DP
* stream exists in the other topologies and if so, where in those topologies it exists.
*/
if (!found_da_stream) {
/*
* The DP stream isn't in the DA topology which would imply that the intention of the
* request was to add the stream, not change its state. It's possible though that
* the stream was added by another request between the time this request was queued
* and now so we need to check the CA topology as well.
*/
ast_trace(-1, "%s: There was no corresponding DA stream so the request was to add a stream\n", session_name);
if (found_np_stream) {
/*
* We found it in the CA topology. Since the intention was to add it
* and it's already there, there's nothing to do.
*/
SCOPE_EXIT_EXPR(continue, "%s: New stream requested but it's already in CA\n", session_name);
} else {
/* OK, it's not in either which would again imply that the intention of the
* request was to add the stream.
*/
ast_trace(-1, "%s: There was no corresponding NP stream\n", session_name);
if (STATE_REMOVED(dp_state)) {
/*
* How can DP request to remove a stream that doesn't seem to exist anythere?
* It's not. It's possible that the stream was already removed and the slot
* reused in the CA topology, but it would still have to exist in the DA
* topology. Bail.
*/
SCOPE_EXIT_LOG_RTN_VALUE(NULL, LOG_ERROR,
"%s: Attempting to remove stream %d:%s but it doesn't exist anywhere.\n", session_name, i, dp_name);
} else {
/*
* We're now sure we want to add the the stream. Since we can re-use
* slots in the CA topology that have streams marked as "removed", we
* use the slot we saved in removed_np_slot if it exists.
*/
ast_trace(-1, "%s: Checking for open slot\n", session_name);
if (removed_np_slot >= 0) {
struct ast_sip_session_media *old_media = AST_VECTOR_GET(&new_pending_state->sessions, removed_np_slot);
res = ast_stream_topology_set_stream(new_pending, removed_np_slot, ast_stream_clone(dp_stream, NULL));
if (res != 0) {
SCOPE_EXIT_LOG_RTN_VALUE(NULL, LOG_WARNING, "%s: Couldn't set stream in new topology\n", session_name);
}
/*
* Since we're reusing the removed_np_slot slot for something else, we need
* to free and remove any session media already in it.
* ast_stream_topology_set_stream() took care of freeing the old stream.
*/
res = AST_VECTOR_REPLACE(&new_pending_state->sessions, removed_np_slot, NULL);
if (res != 0) {
SCOPE_EXIT_LOG_RTN_VALUE(NULL, LOG_WARNING, "%s: Couldn't replace media session\n", session_name);
}
ao2_cleanup(old_media);
SCOPE_EXIT_EXPR(continue, "%s: Replaced removed stream in slot %d\n",
session_name, removed_np_slot);
} else {
int new_slot = ast_stream_topology_append_stream(new_pending, ast_stream_clone(dp_stream, NULL));
if (new_slot < 0) {
SCOPE_EXIT_LOG_RTN_VALUE(NULL, LOG_WARNING, "%s: Couldn't append stream in new topology\n", session_name);
}
res = AST_VECTOR_REPLACE(&new_pending_state->sessions, new_slot, NULL);
if (res != 0) {
SCOPE_EXIT_LOG_RTN_VALUE(NULL, LOG_WARNING, "%s: Couldn't replace media session\n", session_name);
}
SCOPE_EXIT_EXPR(continue, "%s: Appended new stream to slot %d\n",
session_name, new_slot);
}
}
}
} else {
/*
* The DP stream exists in the DA topology so it's a change of some sort.
*/
ast_trace(-1, "%s: There was a corresponding DA stream so the request was to change/remove a stream\n", session_name);
if (dp_state == found_da_state) {
/* No change? Let's see if it's in CA */
if (!found_np_stream) {
/*
* The DP and DA state are the same which would imply that the stream
* already exists but it's not in the CA topology. It's possible that
* between the time this request was queued and now the stream was removed
* from the CA topology and the slot used for something else. Nothing
* we can do here.
*/
SCOPE_EXIT_EXPR(continue, "%s: Stream doesn't exist in CA so nothing to do\n", session_name);
} else if (dp_state == found_np_state) {
SCOPE_EXIT_EXPR(continue, "%s: States are the same all around so nothing to do\n", session_name);
} else {
SCOPE_EXIT_EXPR(continue, "%s: Something changed the CA state so we're going to leave it as is\n", session_name);
}
} else {
/* We have a state change. */
ast_trace(-1, "%s: Requesting state change to %s\n", session_name, ast_stream_state2str(dp_state));
if (!found_np_stream) {
SCOPE_EXIT_EXPR(continue, "%s: Stream doesn't exist in CA so nothing to do\n", session_name);
} else if (da_state == found_np_state) {
ast_stream_set_state(found_np_stream, dp_state);
SCOPE_EXIT_EXPR(continue, "%s: Changed NP stream state from %s to %s\n",
session_name, ast_stream_state2str(found_np_state), ast_stream_state2str(dp_state));
} else {
SCOPE_EXIT_EXPR(continue, "%s: Something changed the CA state so we're going to leave it as is\n",
session_name);
}
}
}
SCOPE_EXIT("%s: Done with slot %d\n", session_name, i);
}
ast_trace(-1, "%s: Resetting default media states\n", session_name);
for (i = 0; i < AST_MEDIA_TYPE_END; i++) {
int j;
new_pending_state->default_session[i] = NULL;
for (j = 0; j < AST_VECTOR_SIZE(&new_pending_state->sessions); j++) {
struct ast_sip_session_media *media = AST_VECTOR_GET(&new_pending_state->sessions, j);
struct ast_stream *stream = ast_stream_topology_get_stream(new_pending_state->topology, j);
if (media && media->type == i && !STREAM_REMOVED(stream)) {
new_pending_state->default_session[i] = media;
break;
}
}
}
if (run_post_validation) {
ast_trace(-1, "%s: Running post-validation\n", session_name);
if (!is_media_state_valid(session_name, new_pending_state)) {
SCOPE_EXIT_LOG_RTN_VALUE(NULL, LOG_ERROR, "State not consistent\n");
}
}
/*
* We need to move the new pending state to another variable and set new_pending_state to NULL
* so RAII_VAR doesn't free it.
*/
returned_media_state = new_pending_state;
new_pending_state = NULL;
SCOPE_EXIT_RTN_VALUE(returned_media_state, "%s: NP: %s\n", session_name,
ast_str_tmp(256, ast_stream_topology_to_str(new_pending, &STR_TMP)));
}
static int sip_session_refresh(struct ast_sip_session *session,
ast_sip_session_request_creation_cb on_request_creation,
ast_sip_session_sdp_creation_cb on_sdp_creation,
ast_sip_session_response_cb on_response,
enum ast_sip_session_refresh_method method, int generate_new_sdp,
struct ast_sip_session_media_state *pending_media_state,
struct ast_sip_session_media_state *active_media_state,
int queued)
{
pjsip_inv_session *inv_session = session->inv_session;
pjmedia_sdp_session *new_sdp = NULL;
pjsip_tx_data *tdata;
int res = -1;
SCOPE_ENTER(3, "%s: New SDP? %s Queued? %s DP: %s DA: %s\n", ast_sip_session_get_name(session),
generate_new_sdp ? "yes" : "no", queued ? "yes" : "no",
pending_media_state ? ast_str_tmp(256, ast_stream_topology_to_str(pending_media_state->topology, &STR_TMP)) : "none",
active_media_state ? ast_str_tmp(256, ast_stream_topology_to_str(active_media_state->topology, &STR_TMP)) : "none");
if (pending_media_state && (!pending_media_state->topology || !generate_new_sdp)) {
ast_sip_session_media_state_free(pending_media_state);
ast_sip_session_media_state_free(active_media_state);
SCOPE_EXIT_RTN_VALUE(-1, "%s: Not sending reinvite because %s%s\n", ast_sip_session_get_name(session),
pending_media_state->topology == NULL ? "pending topology is null " : "",
!generate_new_sdp ? "generate_new_sdp is false" : "");
}
if (inv_session->state == PJSIP_INV_STATE_DISCONNECTED) {
/* Don't try to do anything with a hung-up call */
ast_sip_session_media_state_free(pending_media_state);
ast_sip_session_media_state_free(active_media_state);
SCOPE_EXIT_RTN_VALUE(0, "%s: Not sending reinvite because of disconnected state\n",
ast_sip_session_get_name(session));
}
/* If the dialog has not yet been established we have to defer until it has */
if (inv_session->dlg->state != PJSIP_DIALOG_STATE_ESTABLISHED) {
res = delay_request(session, on_request_creation, on_sdp_creation, on_response,
generate_new_sdp,
method == AST_SIP_SESSION_REFRESH_METHOD_INVITE
? DELAYED_METHOD_INVITE : DELAYED_METHOD_UPDATE,
pending_media_state, active_media_state ? active_media_state : ast_sip_session_media_state_clone(session->active_media_state), queued);
SCOPE_EXIT_RTN_VALUE(res, "%s: Delay sending reinvite because dialog has not been established\n",
ast_sip_session_get_name(session));
}
if (method == AST_SIP_SESSION_REFRESH_METHOD_INVITE) {
if (inv_session->invite_tsx) {
/* We can't send a reinvite yet, so delay it */
res = delay_request(session, on_request_creation, on_sdp_creation,
on_response, generate_new_sdp, DELAYED_METHOD_INVITE, pending_media_state,
active_media_state ? active_media_state : ast_sip_session_media_state_clone(session->active_media_state), queued);
SCOPE_EXIT_RTN_VALUE(res, "%s: Delay sending reinvite because of outstanding transaction\n",
ast_sip_session_get_name(session));
} else if (inv_session->state != PJSIP_INV_STATE_CONFIRMED) {
/* Initial INVITE transaction failed to progress us to a confirmed state
* which means re-invites are not possible
*/
ast_sip_session_media_state_free(pending_media_state);
ast_sip_session_media_state_free(active_media_state);
SCOPE_EXIT_RTN_VALUE(0, "%s: Not sending reinvite because not in confirmed state\n",
ast_sip_session_get_name(session));
}
}
if (generate_new_sdp) {
/* SDP can only be generated if current negotiation has already completed */
if (inv_session->neg
&& pjmedia_sdp_neg_get_state(inv_session->neg)
!= PJMEDIA_SDP_NEG_STATE_DONE) {
res = delay_request(session, on_request_creation, on_sdp_creation,
on_response, generate_new_sdp,
method == AST_SIP_SESSION_REFRESH_METHOD_INVITE
? DELAYED_METHOD_INVITE : DELAYED_METHOD_UPDATE, pending_media_state,
active_media_state ? active_media_state : ast_sip_session_media_state_clone(session->active_media_state), queued);
SCOPE_EXIT_RTN_VALUE(res, "%s: Delay session refresh with new SDP because SDP negotiation is not yet done\n",
ast_sip_session_get_name(session));
}
/* If an explicitly requested media state has been provided use it instead of any pending one */
if (pending_media_state) {
int index;
int type_streams[AST_MEDIA_TYPE_END] = {0};
ast_trace(-1, "%s: Pending media state exists\n", ast_sip_session_get_name(session));
/* Media state conveys a desired media state, so if there are outstanding
* delayed requests we need to ensure we go into the queue and not jump
* ahead. If we sent this media state now then updates could go out of
* order.
*/
if (!queued && !AST_LIST_EMPTY(&session->delayed_requests)) {
res = delay_request(session, on_request_creation, on_sdp_creation,
on_response, generate_new_sdp,
method == AST_SIP_SESSION_REFRESH_METHOD_INVITE
? DELAYED_METHOD_INVITE : DELAYED_METHOD_UPDATE, pending_media_state,
active_media_state ? active_media_state : ast_sip_session_media_state_clone(session->active_media_state), queued);
SCOPE_EXIT_RTN_VALUE(res, "%s: Delay sending reinvite because of outstanding requests\n",
ast_sip_session_get_name(session));
}
/*
* Attempt to resolve only if objects are available, and it's not
* switching to or from an image type.
*/
if (active_media_state && active_media_state->topology &&
(!active_media_state->default_session[AST_MEDIA_TYPE_IMAGE] ==
!pending_media_state->default_session[AST_MEDIA_TYPE_IMAGE])) {
struct ast_sip_session_media_state *new_pending_state;
ast_trace(-1, "%s: Active media state exists and is%s equal to pending\n", ast_sip_session_get_name(session),
!ast_stream_topology_equal(active_media_state->topology,pending_media_state->topology) ? " not" : "");
ast_trace(-1, "%s: DP: %s\n", ast_sip_session_get_name(session), ast_str_tmp(256, ast_stream_topology_to_str(pending_media_state->topology, &STR_TMP)));
ast_trace(-1, "%s: DA: %s\n", ast_sip_session_get_name(session), ast_str_tmp(256, ast_stream_topology_to_str(active_media_state->topology, &STR_TMP)));
ast_trace(-1, "%s: CP: %s\n", ast_sip_session_get_name(session), ast_str_tmp(256, ast_stream_topology_to_str(session->pending_media_state->topology, &STR_TMP)));
ast_trace(-1, "%s: CA: %s\n", ast_sip_session_get_name(session), ast_str_tmp(256, ast_stream_topology_to_str(session->active_media_state->topology, &STR_TMP)));
new_pending_state = resolve_refresh_media_states(ast_sip_session_get_name(session),
pending_media_state, active_media_state, session->active_media_state, 1);
if (new_pending_state) {
ast_trace(-1, "%s: NP: %s\n", ast_sip_session_get_name(session), ast_str_tmp(256, ast_stream_topology_to_str(new_pending_state->topology, &STR_TMP)));
ast_sip_session_media_state_free(pending_media_state);
pending_media_state = new_pending_state;
} else {
ast_sip_session_media_state_reset(pending_media_state);
ast_sip_session_media_state_free(active_media_state);
SCOPE_EXIT_LOG_RTN_VALUE(-1, LOG_WARNING, "%s: Unable to merge media states\n", ast_sip_session_get_name(session));
}
}
/* Prune the media state so the number of streams fit within the configured limits - we do it here
* so that the index of the resulting streams in the SDP match. If we simply left the streams out
* of the SDP when producing it we'd be in trouble. We also enforce formats here for media types that
* are configurable on the endpoint.
*/
ast_trace(-1, "%s: Pruning and checking formats of streams\n", ast_sip_session_get_name(session));
for (index = 0; index < ast_stream_topology_get_count(pending_media_state->topology); ++index) {
struct ast_stream *existing_stream = NULL;
struct ast_stream *stream = ast_stream_topology_get_stream(pending_media_state->topology, index);
SCOPE_ENTER(4, "%s: Checking stream %s\n", ast_sip_session_get_name(session),
ast_stream_get_name(stream));
if (session->active_media_state->topology &&
index < ast_stream_topology_get_count(session->active_media_state->topology)) {
existing_stream = ast_stream_topology_get_stream(session->active_media_state->topology, index);
ast_trace(-1, "%s: Found existing stream %s\n", ast_sip_session_get_name(session),
ast_stream_get_name(existing_stream));
}
if (is_stream_limitation_reached(ast_stream_get_type(stream), session->endpoint, type_streams)) {
if (index < AST_VECTOR_SIZE(&pending_media_state->sessions)) {
struct ast_sip_session_media *session_media = AST_VECTOR_GET(&pending_media_state->sessions, index);
ao2_cleanup(session_media);
AST_VECTOR_REMOVE(&pending_media_state->sessions, index, 1);
}
ast_stream_topology_del_stream(pending_media_state->topology, index);
ast_trace(-1, "%s: Dropped overlimit stream %s\n", ast_sip_session_get_name(session),
ast_stream_get_name(stream));
/* A stream has potentially moved into our spot so we need to jump back so we process it */
index -= 1;
SCOPE_EXIT_EXPR(continue);
}
/* No need to do anything with stream if it's media state is removed */
if (ast_stream_get_state(stream) == AST_STREAM_STATE_REMOVED) {
/* If there is no existing stream we can just not have this stream in the topology at all. */
if (!existing_stream) {
ast_trace(-1, "%s: Dropped removed stream %s\n", ast_sip_session_get_name(session),
ast_stream_get_name(stream));
ast_stream_topology_del_stream(pending_media_state->topology, index);
/* TODO: Do we need to remove the corresponding media state? */
index -= 1;
}
SCOPE_EXIT_EXPR(continue);
}
/* Enforce the configured allowed codecs on audio and video streams */
if ((ast_stream_get_type(stream) == AST_MEDIA_TYPE_AUDIO || ast_stream_get_type(stream) == AST_MEDIA_TYPE_VIDEO) &&
!ast_stream_get_metadata(stream, "pjsip_session_refresh")) {
struct ast_format_cap *joint_cap;
joint_cap = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
if (!joint_cap) {
ast_sip_session_media_state_free(pending_media_state);
ast_sip_session_media_state_free(active_media_state);
res = -1;
SCOPE_EXIT_LOG_EXPR(goto end, LOG_ERROR, "%s: Unable to alloc format caps\n", ast_sip_session_get_name(session));
}
ast_format_cap_get_compatible(ast_stream_get_formats(stream), session->endpoint->media.codecs, joint_cap);
if (!ast_format_cap_count(joint_cap)) {
ao2_ref(joint_cap, -1);
if (!existing_stream) {
/* If there is no existing stream we can just not have this stream in the topology
* at all.
*/
ast_stream_topology_del_stream(pending_media_state->topology, index);
index -= 1;
SCOPE_EXIT_EXPR(continue, "%s: Dropped incompatible stream %s\n",
ast_sip_session_get_name(session), ast_stream_get_name(stream));
} else if (ast_stream_get_state(stream) != ast_stream_get_state(existing_stream) ||
strcmp(ast_stream_get_name(stream), ast_stream_get_name(existing_stream))) {
/* If the underlying stream is a different type or different name then we have to
* mark it as removed, as it is replacing an existing stream. We do this so order
* is preserved.
*/
ast_stream_set_state(stream, AST_STREAM_STATE_REMOVED);
SCOPE_EXIT_EXPR(continue, "%s: Dropped incompatible stream %s\n",
ast_sip_session_get_name(session), ast_stream_get_name(stream));
} else {
/* However if the stream is otherwise remaining the same we can keep the formats
* that exist on it already which allows media to continue to flow. We don't modify
* the format capabilities but do need to cast it so that ao2_bump can raise the
* reference count.
*/
joint_cap = ao2_bump((struct ast_format_cap *)ast_stream_get_formats(existing_stream));
}
}
ast_stream_set_formats(stream, joint_cap);
ao2_cleanup(joint_cap);
}
++type_streams[ast_stream_get_type(stream)];
SCOPE_EXIT();
}
if (session->active_media_state->topology) {
/* SDP is a fun thing. Take for example the fact that streams are never removed. They just become
* declined. To better handle this in the case where something requests a topology change for fewer
* streams than are currently present we fill in the topology to match the current number of streams
* that are active.
*/
for (index = ast_stream_topology_get_count(pending_media_state->topology);
index < ast_stream_topology_get_count(session->active_media_state->topology); ++index) {
struct ast_stream *stream = ast_stream_topology_get_stream(session->active_media_state->topology, index);
struct ast_stream *cloned;
int position;
SCOPE_ENTER(4, "%s: Stream %s not in pending\n", ast_sip_session_get_name(session),
ast_stream_get_name(stream));
cloned = ast_stream_clone(stream, NULL);
if (!cloned) {
ast_sip_session_media_state_free(pending_media_state);
ast_sip_session_media_state_free(active_media_state);
res = -1;
SCOPE_EXIT_LOG_EXPR(goto end, LOG_ERROR, "%s: Unable to clone stream %s\n",
ast_sip_session_get_name(session), ast_stream_get_name(stream));
}
ast_stream_set_state(cloned, AST_STREAM_STATE_REMOVED);
position = ast_stream_topology_append_stream(pending_media_state->topology, cloned);
if (position < 0) {
ast_stream_free(cloned);
ast_sip_session_media_state_free(pending_media_state);
ast_sip_session_media_state_free(active_media_state);
res = -1;
SCOPE_EXIT_LOG_EXPR(goto end, LOG_ERROR, "%s: Unable to append cloned stream\n",
ast_sip_session_get_name(session));
}
SCOPE_EXIT("%s: Appended empty stream in position %d to make counts match\n",
ast_sip_session_get_name(session), position);
}
/*
* We can suppress this re-invite if the pending topology is equal to the currently
* active topology.
*/
if (ast_stream_topology_equal(session->active_media_state->topology, pending_media_state->topology)) {
ast_trace(-1, "%s: CA: %s\n", ast_sip_session_get_name(session), ast_str_tmp(256, ast_stream_topology_to_str(session->active_media_state->topology, &STR_TMP)));
ast_trace(-1, "%s: NP: %s\n", ast_sip_session_get_name(session), ast_str_tmp(256, ast_stream_topology_to_str(pending_media_state->topology, &STR_TMP)));
ast_sip_session_media_state_free(pending_media_state);
ast_sip_session_media_state_free(active_media_state);
/* For external consumers we return 0 to say success, but internally for
* send_delayed_request we return a separate value to indicate that this
* session refresh would be redundant so we didn't send it
*/
SCOPE_EXIT_RTN_VALUE(queued ? 1 : 0, "%s: Topologies are equal. Not sending re-invite\n",
ast_sip_session_get_name(session));
}
}
ast_sip_session_media_state_free(session->pending_media_state);
session->pending_media_state = pending_media_state;
}
new_sdp = generate_session_refresh_sdp(session);
if (!new_sdp) {
ast_sip_session_media_state_reset(session->pending_media_state);
ast_sip_session_media_state_free(active_media_state);
SCOPE_EXIT_LOG_RTN_VALUE(-1, LOG_WARNING, "%s: Failed to generate session refresh SDP. Not sending session refresh\n",
ast_sip_session_get_name(session));
}
if (on_sdp_creation) {
if (on_sdp_creation(session, new_sdp)) {
ast_sip_session_media_state_reset(session->pending_media_state);
ast_sip_session_media_state_free(active_media_state);
SCOPE_EXIT_LOG_RTN_VALUE(-1, LOG_WARNING, "%s: on_sdp_creation failed\n", ast_sip_session_get_name(session));
}
}
}
if (method == AST_SIP_SESSION_REFRESH_METHOD_INVITE) {
if (pjsip_inv_reinvite(inv_session, NULL, new_sdp, &tdata)) {
if (generate_new_sdp) {
ast_sip_session_media_state_reset(session->pending_media_state);
}
ast_sip_session_media_state_free(active_media_state);
SCOPE_EXIT_LOG_RTN_VALUE(-1, LOG_WARNING, "%s: Failed to create reinvite properly\n", ast_sip_session_get_name(session));
}
} else if (pjsip_inv_update(inv_session, NULL, new_sdp, &tdata)) {
if (generate_new_sdp) {
ast_sip_session_media_state_reset(session->pending_media_state);
}
ast_sip_session_media_state_free(active_media_state);
SCOPE_EXIT_LOG_RTN_VALUE(-1, LOG_WARNING, "%s: Failed to create UPDATE properly\n", ast_sip_session_get_name(session));
}
if (on_request_creation) {
if (on_request_creation(session, tdata)) {
if (generate_new_sdp) {
ast_sip_session_media_state_reset(session->pending_media_state);
}
ast_sip_session_media_state_free(active_media_state);
SCOPE_EXIT_LOG_RTN_VALUE(-1, LOG_WARNING, "%s: on_request_creation failed.\n", ast_sip_session_get_name(session));
}
}
ast_sip_session_send_request_with_cb(session, tdata, on_response);
ast_sip_session_media_state_free(active_media_state);
end:
SCOPE_EXIT_RTN_VALUE(res, "%s: Sending session refresh SDP via %s\n", ast_sip_session_get_name(session),
method == AST_SIP_SESSION_REFRESH_METHOD_INVITE ? "re-INVITE" : "UPDATE");
}
int ast_sip_session_refresh(struct ast_sip_session *session,
ast_sip_session_request_creation_cb on_request_creation,
ast_sip_session_sdp_creation_cb on_sdp_creation,
ast_sip_session_response_cb on_response,
enum ast_sip_session_refresh_method method, int generate_new_sdp,
struct ast_sip_session_media_state *media_state)
{
return sip_session_refresh(session, on_request_creation, on_sdp_creation,
on_response, method, generate_new_sdp, media_state, NULL, 0);
}
int ast_sip_session_regenerate_answer(struct ast_sip_session *session,
ast_sip_session_sdp_creation_cb on_sdp_creation)
{
pjsip_inv_session *inv_session = session->inv_session;
pjmedia_sdp_session *new_answer = NULL;
const pjmedia_sdp_session *previous_offer = NULL;
SCOPE_ENTER(1, "%s\n", ast_sip_session_get_name(session));
/* The SDP answer can only be regenerated if it is still pending to be sent */
if (!inv_session->neg || (pjmedia_sdp_neg_get_state(inv_session->neg) != PJMEDIA_SDP_NEG_STATE_REMOTE_OFFER &&
pjmedia_sdp_neg_get_state(inv_session->neg) != PJMEDIA_SDP_NEG_STATE_WAIT_NEGO)) {
ast_log(LOG_WARNING, "Requested to regenerate local SDP answer for channel '%s' but negotiation in state '%s'\n",
ast_channel_name(session->channel), pjmedia_sdp_neg_state_str(pjmedia_sdp_neg_get_state(inv_session->neg)));
SCOPE_EXIT_RTN_VALUE(-1, "Bad negotiation state\n");
}
pjmedia_sdp_neg_get_neg_remote(inv_session->neg, &previous_offer);
if (pjmedia_sdp_neg_get_state(inv_session->neg) == PJMEDIA_SDP_NEG_STATE_WAIT_NEGO) {
/* Transition the SDP negotiator back to when it received the remote offer */
pjmedia_sdp_neg_negotiate(inv_session->pool, inv_session->neg, 0);
pjmedia_sdp_neg_set_remote_offer(inv_session->pool, inv_session->neg, previous_offer);
}
new_answer = create_local_sdp(inv_session, session, previous_offer, 0);
if (!new_answer) {
ast_log(LOG_WARNING, "Could not create a new local SDP answer for channel '%s'\n",
ast_channel_name(session->channel));
SCOPE_EXIT_RTN_VALUE(-1, "Couldn't create new SDP\n");
}
if (on_sdp_creation) {
if (on_sdp_creation(session, new_answer)) {
SCOPE_EXIT_RTN_VALUE(-1, "Callback failed\n");
}
}
pjsip_inv_set_sdp_answer(inv_session, new_answer);
SCOPE_EXIT_RTN_VALUE(0);
}
void ast_sip_session_send_response(struct ast_sip_session *session, pjsip_tx_data *tdata)
{
pjsip_dialog *dlg = pjsip_tdata_get_dlg(tdata);
RAII_VAR(struct ast_sip_session *, dlg_session, dlg ? ast_sip_dialog_get_session(dlg) : NULL, ao2_cleanup);
if (!dlg_session) {
/* If the dialog has a session, handle_outgoing_response will be called
from session_on_tx_response. If it does not, call it from here. */
handle_outgoing_response(session, tdata);
}
pjsip_inv_send_msg(session->inv_session, tdata);
return;
}
static pj_bool_t session_on_rx_request(pjsip_rx_data *rdata);
static pj_bool_t session_on_rx_response(pjsip_rx_data *rdata);
static pj_status_t session_on_tx_response(pjsip_tx_data *tdata);
static void session_on_tsx_state(pjsip_transaction *tsx, pjsip_event *e);
static pjsip_module session_module = {
.name = {"Session Module", 14},
.priority = PJSIP_MOD_PRIORITY_APPLICATION,
.on_rx_request = session_on_rx_request,
.on_rx_response = session_on_rx_response,
.on_tsx_state = session_on_tsx_state,
.on_tx_response = session_on_tx_response,
};
/*! \brief Determine whether the SDP provided requires deferral of negotiating or not
*
* \retval 1 re-invite should be deferred and resumed later
* \retval 0 re-invite should not be deferred
*/
static int sdp_requires_deferral(struct ast_sip_session *session, const pjmedia_sdp_session *sdp)
{
int i;
if (!session->pending_media_state->topology) {
session->pending_media_state->topology = ast_stream_topology_alloc();
if (!session->pending_media_state->topology) {
return -1;
}
}
for (i = 0; i < sdp->media_count; ++i) {
/* See if there are registered handlers for this media stream type */
char media[20];
struct ast_sip_session_sdp_handler *handler;
RAII_VAR(struct sdp_handler_list *, handler_list, NULL, ao2_cleanup);
struct ast_stream *existing_stream = NULL;
struct ast_stream *stream;
enum ast_media_type type;
struct ast_sip_session_media *session_media = NULL;
enum ast_sip_session_sdp_stream_defer res;
pjmedia_sdp_media *remote_stream = sdp->media[i];
/* We need a null-terminated version of the media string */
ast_copy_pj_str(media, &sdp->media[i]->desc.media, sizeof(media));
if (session->active_media_state->topology &&
(i < ast_stream_topology_get_count(session->active_media_state->topology))) {
existing_stream = ast_stream_topology_get_stream(session->active_media_state->topology, i);
}
type = ast_media_type_from_str(media);
stream = ast_stream_alloc(existing_stream ? ast_stream_get_name(existing_stream) : ast_codec_media_type2str(type), type);
if (!stream) {
return -1;
}
/* As this is only called on an incoming SDP offer before processing it is not possible
* for streams and their media sessions to exist.
*/
if (ast_stream_topology_set_stream(session->pending_media_state->topology, i, stream)) {
ast_stream_free(stream);
return -1;
}
if (existing_stream) {
const char *stream_label = ast_stream_get_metadata(existing_stream, "SDP:LABEL");
if (!ast_strlen_zero(stream_label)) {
ast_stream_set_metadata(stream, "SDP:LABEL", stream_label);
}
}
session_media = ast_sip_session_media_state_add(session, session->pending_media_state, ast_media_type_from_str(media), i);
if (!session_media) {
return -1;
}
/* For backwards compatibility with the core the default audio stream is always sendrecv */
if (!ast_sip_session_is_pending_stream_default(session, stream) || strcmp(media, "audio")) {
if (pjmedia_sdp_media_find_attr2(remote_stream, "sendonly", NULL)) {
/* Stream state reflects our state of a stream, so in the case of
* sendonly and recvonly we store the opposite since that is what ours
* is.
*/
ast_stream_set_state(stream, AST_STREAM_STATE_RECVONLY);
} else if (pjmedia_sdp_media_find_attr2(remote_stream, "recvonly", NULL)) {
ast_stream_set_state(stream, AST_STREAM_STATE_SENDONLY);
} else if (pjmedia_sdp_media_find_attr2(remote_stream, "inactive", NULL)) {
ast_stream_set_state(stream, AST_STREAM_STATE_INACTIVE);
} else {
ast_stream_set_state(stream, AST_STREAM_STATE_SENDRECV);
}
} else {
ast_stream_set_state(stream, AST_STREAM_STATE_SENDRECV);
}
if (session_media->handler) {
handler = session_media->handler;
if (handler->defer_incoming_sdp_stream) {
res = handler->defer_incoming_sdp_stream(session, session_media, sdp,
sdp->media[i]);
switch (res) {
case AST_SIP_SESSION_SDP_DEFER_NOT_HANDLED:
break;
case AST_SIP_SESSION_SDP_DEFER_ERROR:
return 0;
case AST_SIP_SESSION_SDP_DEFER_NOT_NEEDED:
break;
case AST_SIP_SESSION_SDP_DEFER_NEEDED:
return 1;
}
}
/* Handled by this handler. Move to the next stream */
continue;
}
handler_list = ao2_find(sdp_handlers, media, OBJ_KEY);
if (!handler_list) {
ast_debug(3, "%s: No registered SDP handlers for media type '%s'\n", ast_sip_session_get_name(session), media);
continue;
}
AST_LIST_TRAVERSE(&handler_list->list, handler, next) {
if (handler == session_media->handler) {
continue;
}
if (!handler->defer_incoming_sdp_stream) {
continue;
}
res = handler->defer_incoming_sdp_stream(session, session_media, sdp,
sdp->media[i]);
switch (res) {
case AST_SIP_SESSION_SDP_DEFER_NOT_HANDLED:
continue;
case AST_SIP_SESSION_SDP_DEFER_ERROR:
session_media_set_handler(session_media, handler);
return 0;
case AST_SIP_SESSION_SDP_DEFER_NOT_NEEDED:
/* Handled by this handler. */
session_media_set_handler(session_media, handler);
break;
case AST_SIP_SESSION_SDP_DEFER_NEEDED:
/* Handled by this handler. */
session_media_set_handler(session_media, handler);
return 1;
}
/* Move to the next stream */
break;
}
}
return 0;
}
static pj_bool_t session_reinvite_on_rx_request(pjsip_rx_data *rdata)
{
pjsip_dialog *dlg;
RAII_VAR(struct ast_sip_session *, session, NULL, ao2_cleanup);
pjsip_rdata_sdp_info *sdp_info;
int deferred;
if (rdata->msg_info.msg->line.req.method.id != PJSIP_INVITE_METHOD ||
!(dlg = pjsip_ua_find_dialog(&rdata->msg_info.cid->id, &rdata->msg_info.to->tag, &rdata->msg_info.from->tag, PJ_FALSE)) ||
!(session = ast_sip_dialog_get_session(dlg)) ||
!session->channel) {
return PJ_FALSE;
}
if (session->inv_session->invite_tsx) {
/* There's a transaction in progress so bail now and let pjproject send 491 */
return PJ_FALSE;
}
if (session->deferred_reinvite) {
pj_str_t key, deferred_key;
pjsip_tx_data *tdata;
/* We use memory from the new request on purpose so the deferred reinvite pool does not grow uncontrollably */
pjsip_tsx_create_key(rdata->tp_info.pool, &key, PJSIP_ROLE_UAS, &rdata->msg_info.cseq->method, rdata);
pjsip_tsx_create_key(rdata->tp_info.pool, &deferred_key, PJSIP_ROLE_UAS, &session->deferred_reinvite->msg_info.cseq->method,
session->deferred_reinvite);
/* If this is a retransmission ignore it */
if (!pj_strcmp(&key, &deferred_key)) {
return PJ_TRUE;
}
/* Otherwise this is a new re-invite, so reject it */
if (pjsip_dlg_create_response(dlg, rdata, 491, NULL, &tdata) == PJ_SUCCESS) {
if (pjsip_endpt_send_response2(ast_sip_get_pjsip_endpoint(), rdata, tdata, NULL, NULL) != PJ_SUCCESS) {
pjsip_tx_data_dec_ref(tdata);
}
}
return PJ_TRUE;
}
if (!(sdp_info = pjsip_rdata_get_sdp_info(rdata)) ||
(sdp_info->sdp_err != PJ_SUCCESS)) {
return PJ_FALSE;
}
if (!sdp_info->sdp) {
return PJ_FALSE;
}
deferred = sdp_requires_deferral(session, sdp_info->sdp);
if (deferred == -1) {
ast_sip_session_media_state_reset(session->pending_media_state);
return PJ_FALSE;
} else if (!deferred) {
return PJ_FALSE;
}
pjsip_rx_data_clone(rdata, 0, &session->deferred_reinvite);
return PJ_TRUE;
}
void ast_sip_session_resume_reinvite(struct ast_sip_session *session)
{
if (!session->deferred_reinvite) {
return;
}
if (session->channel) {
pjsip_endpt_process_rx_data(ast_sip_get_pjsip_endpoint(),
session->deferred_reinvite, NULL, NULL);
}
pjsip_rx_data_free_cloned(session->deferred_reinvite);
session->deferred_reinvite = NULL;
}
static pjsip_module session_reinvite_module = {
.name = { "Session Re-Invite Module", 24 },
.priority = PJSIP_MOD_PRIORITY_UA_PROXY_LAYER - 1,
.on_rx_request = session_reinvite_on_rx_request,
};
void ast_sip_session_send_request_with_cb(struct ast_sip_session *session, pjsip_tx_data *tdata,
ast_sip_session_response_cb on_response)
{
pjsip_inv_session *inv_session = session->inv_session;
/* For every request except BYE we disallow sending of the message when
* the session has been disconnected. A BYE request is special though
* because it can be sent again after the session is disconnected except
* with credentials.
*/
if (inv_session->state == PJSIP_INV_STATE_DISCONNECTED &&
tdata->msg->line.req.method.id != PJSIP_BYE_METHOD) {
return;
}
ast_sip_mod_data_set(tdata->pool, tdata->mod_data, session_module.id,
MOD_DATA_ON_RESPONSE, on_response);
handle_outgoing_request(session, tdata);
pjsip_inv_send_msg(session->inv_session, tdata);
return;
}
void ast_sip_session_send_request(struct ast_sip_session *session, pjsip_tx_data *tdata)
{
ast_sip_session_send_request_with_cb(session, tdata, NULL);
}
int ast_sip_session_create_invite(struct ast_sip_session *session, pjsip_tx_data **tdata)
{
pjmedia_sdp_session *offer;
SCOPE_ENTER(1, "%s\n", ast_sip_session_get_name(session));
if (!(offer = create_local_sdp(session->inv_session, session, NULL, 0))) {
pjsip_inv_terminate(session->inv_session, 500, PJ_FALSE);
SCOPE_EXIT_RTN_VALUE(-1, "Couldn't create offer\n");
}
pjsip_inv_set_local_sdp(session->inv_session, offer);
pjmedia_sdp_neg_set_prefer_remote_codec_order(session->inv_session->neg, PJ_FALSE);
#ifdef PJMEDIA_SDP_NEG_ANSWER_MULTIPLE_CODECS
if (!session->endpoint->preferred_codec_only) {
pjmedia_sdp_neg_set_answer_multiple_codecs(session->inv_session->neg, PJ_TRUE);
}
#endif
/*
* We MUST call set_from_header() before pjsip_inv_invite. If we don't, the
* From in the initial INVITE will be wrong but the rest of the messages will be OK.
*/
set_from_header(session);
if (pjsip_inv_invite(session->inv_session, tdata) != PJ_SUCCESS) {
SCOPE_EXIT_RTN_VALUE(-1, "pjsip_inv_invite failed\n");
}
SCOPE_EXIT_RTN_VALUE(0);
}
static int datastore_hash(const void *obj, int flags)
{
const struct ast_datastore *datastore = obj;
const char *uid = flags & OBJ_KEY ? obj : datastore->uid;
ast_assert(uid != NULL);
return ast_str_hash(uid);
}
static int datastore_cmp(void *obj, void *arg, int flags)
{
const struct ast_datastore *datastore1 = obj;
const struct ast_datastore *datastore2 = arg;
const char *uid2 = flags & OBJ_KEY ? arg : datastore2->uid;
ast_assert(datastore1->uid != NULL);
ast_assert(uid2 != NULL);
return strcmp(datastore1->uid, uid2) ? 0 : CMP_MATCH | CMP_STOP;
}
static void session_destructor(void *obj)
{
struct ast_sip_session *session = obj;
struct ast_sip_session_delayed_request *delay;
#ifdef TEST_FRAMEWORK
/* We dup the endpoint ID in case the endpoint gets freed out from under us */
const char *endpoint_name = session->endpoint ?
ast_strdupa(ast_sorcery_object_get_id(session->endpoint)) : "<none>";
#endif
ast_debug(3, "%s: Destroying SIP session\n", ast_sip_session_get_name(session));
ast_test_suite_event_notify("SESSION_DESTROYING",
"Endpoint: %s\r\n"
"AOR: %s\r\n"
"Contact: %s"
, endpoint_name
, session->aor ? ast_sorcery_object_get_id(session->aor) : "<none>"
, session->contact ? ast_sorcery_object_get_id(session->contact) : "<none>"
);
/* fire session destroy handler */
handle_session_destroy(session);
/* remove all registered supplements */
ast_sip_session_remove_supplements(session);
AST_LIST_HEAD_DESTROY(&session->supplements);
/* remove all saved media stats */
AST_VECTOR_RESET(&session->media_stats, ast_free);
AST_VECTOR_FREE(&session->media_stats);
ast_taskprocessor_unreference(session->serializer);
ao2_cleanup(session->datastores);
ast_sip_session_media_state_free(session->active_media_state);
ast_sip_session_media_state_free(session->pending_media_state);
while ((delay = AST_LIST_REMOVE_HEAD(&session->delayed_requests, next))) {
delayed_request_free(delay);
}
ast_party_id_free(&session->id);
ao2_cleanup(session->endpoint);
ao2_cleanup(session->aor);
ao2_cleanup(session->contact);
ao2_cleanup(session->direct_media_cap);
ast_dsp_free(session->dsp);
if (session->inv_session) {
struct pjsip_dialog *dlg = session->inv_session->dlg;
/* The INVITE session uses the dialog pool for memory, so we need to
* decrement its reference first before that of the dialog.
*/
#ifdef HAVE_PJSIP_INV_SESSION_REF
pjsip_inv_dec_ref(session->inv_session);
#endif
pjsip_dlg_dec_session(dlg, &session_module);
}
ast_test_suite_event_notify("SESSION_DESTROYED", "Endpoint: %s", endpoint_name);
}
/*! \brief Destructor for SIP channel */
static void sip_channel_destroy(void *obj)
{
struct ast_sip_channel_pvt *channel = obj;
ao2_cleanup(channel->pvt);
ao2_cleanup(channel->session);
}
struct ast_sip_channel_pvt *ast_sip_channel_pvt_alloc(void *pvt, struct ast_sip_session *session)
{
struct ast_sip_channel_pvt *channel = ao2_alloc(sizeof(*channel), sip_channel_destroy);
if (!channel) {
return NULL;
}
ao2_ref(pvt, +1);
channel->pvt = pvt;
ao2_ref(session, +1);
channel->session = session;
return channel;
}
struct ast_sip_session *ast_sip_session_alloc(struct ast_sip_endpoint *endpoint,
struct ast_sip_contact *contact, pjsip_inv_session *inv_session, pjsip_rx_data *rdata)
{
RAII_VAR(struct ast_sip_session *, session, NULL, ao2_cleanup);
struct ast_sip_session *ret_session;
int dsp_features = 0;
session = ao2_alloc(sizeof(*session), session_destructor);
if (!session) {
return NULL;
}
AST_LIST_HEAD_INIT(&session->supplements);
AST_LIST_HEAD_INIT_NOLOCK(&session->delayed_requests);
ast_party_id_init(&session->id);
session->direct_media_cap = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
if (!session->direct_media_cap) {
return NULL;
}
session->datastores = ao2_container_alloc_hash(AO2_ALLOC_OPT_LOCK_MUTEX, 0,
DATASTORE_BUCKETS, datastore_hash, NULL, datastore_cmp);
if (!session->datastores) {
return NULL;
}
session->active_media_state = ast_sip_session_media_state_alloc();
if (!session->active_media_state) {
return NULL;
}
session->pending_media_state = ast_sip_session_media_state_alloc();
if (!session->pending_media_state) {
return NULL;
}
if (AST_VECTOR_INIT(&session->media_stats, 1) < 0) {
return NULL;
}
if (endpoint->dtmf == AST_SIP_DTMF_INBAND || endpoint->dtmf == AST_SIP_DTMF_AUTO) {
dsp_features |= DSP_FEATURE_DIGIT_DETECT;
}
if (endpoint->faxdetect) {
dsp_features |= DSP_FEATURE_FAX_DETECT;
}
if (dsp_features) {
session->dsp = ast_dsp_new();
if (!session->dsp) {
return NULL;
}
ast_dsp_set_features(session->dsp, dsp_features);
}
session->endpoint = ao2_bump(endpoint);
if (rdata) {
/*
* We must continue using the serializer that the original
* INVITE came in on for the dialog. There may be
* retransmissions already enqueued in the original
* serializer that can result in reentrancy and message
* sequencing problems.
*/
session->serializer = ast_sip_get_distributor_serializer(rdata);
} else {
char tps_name[AST_TASKPROCESSOR_MAX_NAME + 1];
/* Create name with seq number appended. */
ast_taskprocessor_build_name(tps_name, sizeof(tps_name), "pjsip/outsess/%s",
ast_sorcery_object_get_id(endpoint));
session->serializer = ast_sip_create_serializer(tps_name);
}
if (!session->serializer) {
return NULL;
}
ast_sip_dialog_set_serializer(inv_session->dlg, session->serializer);
ast_sip_dialog_set_endpoint(inv_session->dlg, endpoint);
/* When a PJSIP INVITE session is created it is created with a reference
* count of 1, with that reference being managed by the underlying state
* of the INVITE session itself. When the INVITE session transitions to
* a DISCONNECTED state that reference is released. This means we can not
* rely on that reference to ensure the INVITE session remains for the
* lifetime of our session. To ensure it does we add our own reference
* and release it when our own session goes away, ensuring that the INVITE
* session remains for the lifetime of session.
*/
#ifdef HAVE_PJSIP_INV_SESSION_REF
if (pjsip_inv_add_ref(inv_session) != PJ_SUCCESS) {
ast_log(LOG_ERROR, "Can't increase the session reference counter\n");
return NULL;
}
#endif
pjsip_dlg_inc_session(inv_session->dlg, &session_module);
inv_session->mod_data[session_module.id] = ao2_bump(session);
session->contact = ao2_bump(contact);
session->inv_session = inv_session;
session->dtmf = endpoint->dtmf;
session->moh_passthrough = endpoint->moh_passthrough;
if (ast_sip_session_add_supplements(session)) {
/* Release the ref held by session->inv_session */
ao2_ref(session, -1);
return NULL;
}
session->authentication_challenge_count = 0;
/* Fire session begin handlers */
handle_session_begin(session);
/* Avoid unnecessary ref manipulation to return a session */
ret_session = session;
session = NULL;
return ret_session;
}
/*! \brief struct controlling the suspension of the session's serializer. */
struct ast_sip_session_suspender {
ast_cond_t cond_suspended;
ast_cond_t cond_complete;
int suspended;
int complete;
};
static void sip_session_suspender_dtor(void *vdoomed)
{
struct ast_sip_session_suspender *doomed = vdoomed;
ast_cond_destroy(&doomed->cond_suspended);
ast_cond_destroy(&doomed->cond_complete);
}
/*!
* \internal
* \brief Block the session serializer thread task.
*
* \param data Pushed serializer task data for suspension.
*
* \retval 0
*/
static int sip_session_suspend_task(void *data)
{
struct ast_sip_session_suspender *suspender = data;
ao2_lock(suspender);
/* Signal that the serializer task is now suspended. */
suspender->suspended = 1;
ast_cond_signal(&suspender->cond_suspended);
/* Wait for the serializer suspension to be completed. */
while (!suspender->complete) {
ast_cond_wait(&suspender->cond_complete, ao2_object_get_lockaddr(suspender));
}
ao2_unlock(suspender);
ao2_ref(suspender, -1);
return 0;
}
void ast_sip_session_suspend(struct ast_sip_session *session)
{
struct ast_sip_session_suspender *suspender;
int res;
ast_assert(session->suspended == NULL);
if (ast_taskprocessor_is_task(session->serializer)) {
/* I am the session's serializer thread so I cannot suspend. */
return;
}
if (ast_taskprocessor_is_suspended(session->serializer)) {
/* The serializer already suspended. */
return;
}
suspender = ao2_alloc(sizeof(*suspender), sip_session_suspender_dtor);
if (!suspender) {
/* We will just have to hope that the system does not deadlock */
return;
}
ast_cond_init(&suspender->cond_suspended, NULL);
ast_cond_init(&suspender->cond_complete, NULL);
ao2_ref(suspender, +1);
res = ast_sip_push_task(session->serializer, sip_session_suspend_task, suspender);
if (res) {
/* We will just have to hope that the system does not deadlock */
ao2_ref(suspender, -2);
return;
}
session->suspended = suspender;
/* Wait for the serializer to get suspended. */
ao2_lock(suspender);
while (!suspender->suspended) {
ast_cond_wait(&suspender->cond_suspended, ao2_object_get_lockaddr(suspender));
}
ao2_unlock(suspender);
ast_taskprocessor_suspend(session->serializer);
}
void ast_sip_session_unsuspend(struct ast_sip_session *session)
{
struct ast_sip_session_suspender *suspender = session->suspended;
if (!suspender) {
/* Nothing to do */
return;
}
session->suspended = NULL;
/* Signal that the serializer task suspension is now complete. */
ao2_lock(suspender);
suspender->complete = 1;
ast_cond_signal(&suspender->cond_complete);
ao2_unlock(suspender);
ao2_ref(suspender, -1);
ast_taskprocessor_unsuspend(session->serializer);
}
/*!
* \internal
* \brief Handle initial INVITE challenge response message.
* \since 13.5.0
*
* \param rdata PJSIP receive response message data.
*
* \retval PJ_FALSE Did not handle message.
* \retval PJ_TRUE Handled message.
*/
static pj_bool_t outbound_invite_auth(pjsip_rx_data *rdata)
{
pjsip_transaction *tsx;
pjsip_dialog *dlg;
pjsip_inv_session *inv;
pjsip_tx_data *tdata;
struct ast_sip_session *session;
if (rdata->msg_info.msg->line.status.code != 401
&& rdata->msg_info.msg->line.status.code != 407) {
/* Doesn't pertain to us. Move on */
return PJ_FALSE;
}
tsx = pjsip_rdata_get_tsx(rdata);
dlg = pjsip_rdata_get_dlg(rdata);
if (!dlg || !tsx) {
return PJ_FALSE;
}
if (tsx->method.id != PJSIP_INVITE_METHOD) {
/* Not an INVITE that needs authentication */
return PJ_FALSE;
}
inv = pjsip_dlg_get_inv_session(dlg);
session = inv->mod_data[session_module.id];
if (PJSIP_INV_STATE_CONFIRMED <= inv->state) {
/*
* We cannot handle reINVITE authentication at this
* time because the reINVITE transaction is still in
* progress.
*/
ast_debug(3, "%s: A reINVITE is being challenged\n", ast_sip_session_get_name(session));
return PJ_FALSE;
}
ast_debug(3, "%s: Initial INVITE is being challenged.\n", ast_sip_session_get_name(session));
if (++session->authentication_challenge_count > MAX_RX_CHALLENGES) {
ast_debug(3, "%s: Initial INVITE reached maximum number of auth attempts.\n", ast_sip_session_get_name(session));
return PJ_FALSE;
}
if (ast_sip_create_request_with_auth(&session->endpoint->outbound_auths, rdata,
tsx->last_tx, &tdata)) {
return PJ_FALSE;
}
/*
* Restart the outgoing initial INVITE transaction to deal
* with authentication.
*/
pjsip_inv_uac_restart(inv, PJ_FALSE);
ast_sip_session_send_request(session, tdata);
return PJ_TRUE;
}
static pjsip_module outbound_invite_auth_module = {
.name = {"Outbound INVITE Auth", 20},
.priority = PJSIP_MOD_PRIORITY_DIALOG_USAGE,
.on_rx_response = outbound_invite_auth,
};
/*!
* \internal
* \brief Setup outbound initial INVITE authentication.
* \since 13.5.0
*
* \param dlg PJSIP dialog to attach outbound authentication.
*
* \retval 0 on success.
* \retval -1 on error.
*/
static int setup_outbound_invite_auth(pjsip_dialog *dlg)
{
pj_status_t status;
++dlg->sess_count;
status = pjsip_dlg_add_usage(dlg, &outbound_invite_auth_module, NULL);
--dlg->sess_count;
return status != PJ_SUCCESS ? -1 : 0;
}
struct ast_sip_session *ast_sip_session_create_outgoing(struct ast_sip_endpoint *endpoint,
struct ast_sip_contact *contact, const char *location, const char *request_user,
struct ast_stream_topology *req_topology)
{
const char *uri = NULL;
RAII_VAR(struct ast_sip_aor *, found_aor, NULL, ao2_cleanup);
RAII_VAR(struct ast_sip_contact *, found_contact, NULL, ao2_cleanup);
pjsip_timer_setting timer;
pjsip_dialog *dlg;
struct pjsip_inv_session *inv_session;
RAII_VAR(struct ast_sip_session *, session, NULL, ao2_cleanup);
struct ast_sip_session *ret_session;
SCOPE_ENTER(1, "%s %s Topology: %s\n", ast_sorcery_object_get_id(endpoint), request_user,
ast_str_tmp(256, ast_stream_topology_to_str(req_topology, &STR_TMP)));
/* If no location has been provided use the AOR list from the endpoint itself */
if (location || !contact) {
location = S_OR(location, endpoint->aors);
ast_sip_location_retrieve_contact_and_aor_from_list_filtered(location, AST_SIP_CONTACT_FILTER_REACHABLE,
&found_aor, &found_contact);
if (!found_contact || ast_strlen_zero(found_contact->uri)) {
uri = location;
} else {
uri = found_contact->uri;
}
} else {
uri = contact->uri;
}
/* If we still have no URI to dial fail to create the session */
if (ast_strlen_zero(uri)) {
ast_log(LOG_ERROR, "Endpoint '%s': No URI available. Is endpoint registered?\n",
ast_sorcery_object_get_id(endpoint));
SCOPE_EXIT_RTN_VALUE(NULL, "No URI\n");
}
if (!(dlg = ast_sip_create_dialog_uac(endpoint, uri, request_user))) {
SCOPE_EXIT_RTN_VALUE(NULL, "Couldn't create dialog\n");
}
if (setup_outbound_invite_auth(dlg)) {
pjsip_dlg_terminate(dlg);
SCOPE_EXIT_RTN_VALUE(NULL, "Couldn't setup auth\n");
}
if (pjsip_inv_create_uac(dlg, NULL, endpoint->extensions.flags, &inv_session) != PJ_SUCCESS) {
pjsip_dlg_terminate(dlg);
SCOPE_EXIT_RTN_VALUE(NULL, "Couldn't create uac\n");
}
#if defined(HAVE_PJSIP_REPLACE_MEDIA_STREAM) || defined(PJMEDIA_SDP_NEG_ALLOW_MEDIA_CHANGE)
inv_session->sdp_neg_flags = PJMEDIA_SDP_NEG_ALLOW_MEDIA_CHANGE;
#endif
pjsip_timer_setting_default(&timer);
timer.min_se = endpoint->extensions.timer.min_se;
timer.sess_expires = endpoint->extensions.timer.sess_expires;
pjsip_timer_init_session(inv_session, &timer);
session = ast_sip_session_alloc(endpoint, found_contact ? found_contact : contact,
inv_session, NULL);
if (!session) {
pjsip_inv_terminate(inv_session, 500, PJ_FALSE);
return NULL;
}
session->aor = ao2_bump(found_aor);
session->call_direction = AST_SIP_SESSION_OUTGOING_CALL;
ast_party_id_copy(&session->id, &endpoint->id.self);
if (ast_stream_topology_get_count(req_topology) > 0) {
/* get joint caps between req_topology and endpoint topology */
int i;
for (i = 0; i < ast_stream_topology_get_count(req_topology); ++i) {
struct ast_stream *req_stream;
struct ast_stream *clone_stream;
req_stream = ast_stream_topology_get_stream(req_topology, i);
if (ast_stream_get_state(req_stream) == AST_STREAM_STATE_REMOVED) {
continue;
}
clone_stream = ast_sip_session_create_joint_call_stream(session, req_stream);
if (!clone_stream || ast_stream_get_format_count(clone_stream) == 0) {
ast_stream_free(clone_stream);
continue;
}
if (!session->pending_media_state->topology) {
session->pending_media_state->topology = ast_stream_topology_alloc();
if (!session->pending_media_state->topology) {
pjsip_inv_terminate(inv_session, 500, PJ_FALSE);
ao2_ref(session, -1);
SCOPE_EXIT_RTN_VALUE(NULL, "Couldn't create topology\n");
}
}
if (ast_stream_topology_append_stream(session->pending_media_state->topology, clone_stream) < 0) {
ast_stream_free(clone_stream);
continue;
}
}
}
if (!session->pending_media_state->topology) {
/* Use the configured topology on the endpoint as the pending one */
session->pending_media_state->topology = ast_stream_topology_clone(endpoint->media.topology);
if (!session->pending_media_state->topology) {
pjsip_inv_terminate(inv_session, 500, PJ_FALSE);
ao2_ref(session, -1);
SCOPE_EXIT_RTN_VALUE(NULL, "Couldn't clone topology\n");
}
}
if (pjsip_dlg_add_usage(dlg, &session_module, NULL) != PJ_SUCCESS) {
pjsip_inv_terminate(inv_session, 500, PJ_FALSE);
/* Since we are not notifying ourselves that the INVITE session is being terminated
* we need to manually drop its reference to session
*/
ao2_ref(session, -1);
SCOPE_EXIT_RTN_VALUE(NULL, "Couldn't add usage\n");
}
/* Avoid unnecessary ref manipulation to return a session */
ret_session = session;
session = NULL;
SCOPE_EXIT_RTN_VALUE(ret_session);
}
static int session_end(void *vsession);
static int session_end_completion(void *vsession);
void ast_sip_session_terminate(struct ast_sip_session *session, int response)
{
pj_status_t status;
pjsip_tx_data *packet = NULL;
SCOPE_ENTER(1, "%s Response %d\n", ast_sip_session_get_name(session), response);
if (session->defer_terminate) {
session->terminate_while_deferred = 1;
SCOPE_EXIT_RTN("Deferred\n");
}
if (!response) {
response = 603;
}
/* The media sessions need to exist for the lifetime of the underlying channel
* to ensure that anything (such as bridge_native_rtp) has access to them as
* appropriate. Since ast_sip_session_terminate is called by chan_pjsip and other
* places when the session is to be terminated we terminate any existing
* media sessions here.
*/
ast_sip_session_media_stats_save(session, session->active_media_state);
SWAP(session->active_media_state, session->pending_media_state);
ast_sip_session_media_state_reset(session->pending_media_state);
switch (session->inv_session->state) {
case PJSIP_INV_STATE_NULL:
if (!session->inv_session->invite_tsx) {
/*
* Normally, it's pjproject's transaction cleanup that ultimately causes the
* final session reference to be released but if both STATE and invite_tsx are NULL,
* we never created a transaction in the first place. In this case, we need to
* do the cleanup ourselves.
*/
/* Transfer the inv_session session reference to the session_end_task */
session->inv_session->mod_data[session_module.id] = NULL;
pjsip_inv_terminate(session->inv_session, response, PJ_TRUE);
session_end(session);
/*
* session_end_completion will cleanup the final session reference unless
* ast_sip_session_terminate's caller is holding one.
*/
session_end_completion(session);
} else {
pjsip_inv_terminate(session->inv_session, response, PJ_TRUE);
}
break;
case PJSIP_INV_STATE_CONFIRMED:
if (session->inv_session->invite_tsx) {
ast_debug(3, "%s: Delay sending BYE because of outstanding transaction...\n",
ast_sip_session_get_name(session));
/* If this is delayed the only thing that will happen is a BYE request so we don't
* actually need to store the response code for when it happens.
*/
delay_request(session, NULL, NULL, NULL, 0, DELAYED_METHOD_BYE, NULL, NULL, 1);
break;
}
/* Fall through */
default:
status = pjsip_inv_end_session(session->inv_session, response, NULL, &packet);
if (status == PJ_SUCCESS && packet) {
struct ast_sip_session_delayed_request *delay;
/* Flush any delayed requests so they cannot overlap this transaction. */
while ((delay = AST_LIST_REMOVE_HEAD(&session->delayed_requests, next))) {
delayed_request_free(delay);
}
if (packet->msg->type == PJSIP_RESPONSE_MSG) {
ast_sip_session_send_response(session, packet);
} else {
ast_sip_session_send_request(session, packet);
}
}
break;
}
SCOPE_EXIT_RTN();
}
static int session_termination_task(void *data)
{
struct ast_sip_session *session = data;
if (session->defer_terminate) {
session->defer_terminate = 0;
if (session->inv_session) {
ast_sip_session_terminate(session, 0);
}
}
ao2_ref(session, -1);
return 0;
}
static void session_termination_cb(pj_timer_heap_t *timer_heap, struct pj_timer_entry *entry)
{
struct ast_sip_session *session = entry->user_data;
if (ast_sip_push_task(session->serializer, session_termination_task, session)) {
ao2_cleanup(session);
}
}
int ast_sip_session_defer_termination(struct ast_sip_session *session)
{
pj_time_val delay = { .sec = 60, };
int res;
/* The session should not have an active deferred termination request. */
ast_assert(!session->defer_terminate);
session->defer_terminate = 1;
session->defer_end = 1;
session->ended_while_deferred = 0;
ao2_ref(session, +1);
pj_timer_entry_init(&session->scheduled_termination, 0, session, session_termination_cb);
res = (pjsip_endpt_schedule_timer(ast_sip_get_pjsip_endpoint(),
&session->scheduled_termination, &delay) != PJ_SUCCESS) ? -1 : 0;
if (res) {
session->defer_terminate = 0;
ao2_ref(session, -1);
}
return res;
}
/*!
* \internal
* \brief Stop the defer termination timer if it is still running.
* \since 13.5.0
*
* \param session Which session to stop the timer.
*/
static void sip_session_defer_termination_stop_timer(struct ast_sip_session *session)
{
if (pj_timer_heap_cancel_if_active(pjsip_endpt_get_timer_heap(ast_sip_get_pjsip_endpoint()),
&session->scheduled_termination, session->scheduled_termination.id)) {
ao2_ref(session, -1);
}
}
void ast_sip_session_defer_termination_cancel(struct ast_sip_session *session)
{
if (!session->defer_terminate) {
/* Already canceled or timer fired. */
return;
}
session->defer_terminate = 0;
if (session->terminate_while_deferred) {
/* Complete the termination started by the upper layer. */
ast_sip_session_terminate(session, 0);
}
/* Stop the termination timer if it is still running. */
sip_session_defer_termination_stop_timer(session);
}
void ast_sip_session_end_if_deferred(struct ast_sip_session *session)
{
if (!session->defer_end) {
return;
}
session->defer_end = 0;
if (session->ended_while_deferred) {
/* Complete the session end started by the remote hangup. */
ast_debug(3, "%s: Ending session after being deferred\n", ast_sip_session_get_name(session));
session->ended_while_deferred = 0;
session_end(session);
}
}
struct ast_sip_session *ast_sip_dialog_get_session(pjsip_dialog *dlg)
{
pjsip_inv_session *inv_session = pjsip_dlg_get_inv_session(dlg);
struct ast_sip_session *session;
if (!inv_session ||
!(session = inv_session->mod_data[session_module.id])) {
return NULL;
}
ao2_ref(session, +1);
return session;
}
pjsip_dialog *ast_sip_session_get_dialog(const struct ast_sip_session *session)
{
pjsip_inv_session *inv_session = session->inv_session;
if (!inv_session) {
return NULL;
}
return inv_session->dlg;
}
pjsip_inv_state ast_sip_session_get_pjsip_inv_state(const struct ast_sip_session *session)
{
pjsip_inv_session *inv_session = session->inv_session;
if (!inv_session) {
return PJSIP_INV_STATE_NULL;
}
return inv_session->state;
}
/*! \brief Fetch just the Caller ID number in order of PAI, RPID, From */
static int fetch_callerid_num(struct ast_sip_session *session, pjsip_rx_data *rdata, char *buf, size_t len)
{
int res = -1;
struct ast_party_id id;
ast_party_id_init(&id);
if (!ast_sip_set_id_from_invite(rdata, &id, &session->endpoint->id.self, session->endpoint->id.trust_inbound)) {
ast_copy_string(buf, id.number.str, len);
res = 0;
}
ast_party_id_free(&id);
return res;
}
enum sip_get_destination_result {
/*! The extension was successfully found */
SIP_GET_DEST_EXTEN_FOUND,
/*! The extension specified in the RURI was not found */
SIP_GET_DEST_EXTEN_NOT_FOUND,
/*! The extension specified in the RURI was a partial match */
SIP_GET_DEST_EXTEN_PARTIAL,
/*! The RURI is of an unsupported scheme */
SIP_GET_DEST_UNSUPPORTED_URI,
};
/*!
* \brief Determine where in the dialplan a call should go
*
* This uses the username in the request URI to try to match
* an extension in the endpoint's configured context in order
* to route the call.
*
* \param session The inbound SIP session
* \param rdata The SIP INVITE
*/
static enum sip_get_destination_result get_destination(struct ast_sip_session *session, pjsip_rx_data *rdata)
{
char cid_num[AST_CHANNEL_NAME];
pjsip_uri *ruri = rdata->msg_info.msg->line.req.uri;
struct ast_features_pickup_config *pickup_cfg;
const char *pickupexten;
if (!ast_sip_is_allowed_uri(ruri)) {
return SIP_GET_DEST_UNSUPPORTED_URI;
}
ast_copy_pj_str(session->exten, ast_sip_pjsip_uri_get_username(ruri), sizeof(session->exten));
if (ast_strlen_zero(session->exten)) {
/* Some SIP devices send an empty extension for PLAR: this should map to s */
ast_debug(1, "RURI contains no user portion: defaulting to extension 's'\n");
ast_copy_string(session->exten, "s", sizeof(session->exten));
}
/*
* We may want to match in the dialplan without any user
* options getting in the way.
*/
AST_SIP_USER_OPTIONS_TRUNCATE_CHECK(session->exten);
pickup_cfg = ast_get_chan_features_pickup_config(NULL); /* session->channel doesn't exist yet, using NULL */
if (!pickup_cfg) {
ast_log(LOG_ERROR, "%s: Unable to retrieve pickup configuration options. Unable to detect call pickup extension\n",
ast_sip_session_get_name(session));
pickupexten = "";
} else {
pickupexten = ast_strdupa(pickup_cfg->pickupexten);
ao2_ref(pickup_cfg, -1);
}
fetch_callerid_num(session, rdata, cid_num, sizeof(cid_num));
/* If there's an overlap_context override specified, use that; otherwise, just use the endpoint's context */
if (!strcmp(session->exten, pickupexten) ||
ast_exists_extension(NULL, S_OR(session->endpoint->overlap_context, session->endpoint->context), session->exten, 1, S_OR(cid_num, NULL))) {
/*
* Save off the INVITE Request-URI in case it is
* needed: CHANNEL(pjsip,request_uri)
*/
session->request_uri = pjsip_uri_clone(session->inv_session->pool, ruri);
return SIP_GET_DEST_EXTEN_FOUND;
}
/*
* Check for partial match via overlap dialling (if enabled)
*/
if (session->endpoint->allow_overlap && (
!strncmp(session->exten, pickupexten, strlen(session->exten)) ||
ast_canmatch_extension(NULL, S_OR(session->endpoint->overlap_context, session->endpoint->context), session->exten, 1, S_OR(cid_num, NULL)))) {
/* Overlap partial match */
return SIP_GET_DEST_EXTEN_PARTIAL;
}
return SIP_GET_DEST_EXTEN_NOT_FOUND;
}
/*!
* \internal
* \brief Process initial answer for an incoming invite
*
* This function should only be called during the setup, and handling of a
* new incoming invite. Most, if not all of the time, this will be called
* when an error occurs and we need to respond as such.
*
* When a SIP session termination code is given for the answer it's assumed
* this call then will be the final bit of processing before ending session
* setup. As such, we've been holding a lock, and a reference on the invite
* session's dialog. So before returning this function removes that reference,
* and unlocks the dialog.
*
* \param inv_session The session on which to answer
* \param rdata The original request
* \param answer_code The answer's numeric code
* \param terminate_code The termination code if the answer fails
* \param notify Whether or not to call on_state_changed
*
* \retval 0 if invite successfully answered, -1 if an error occurred
*/
static int new_invite_initial_answer(pjsip_inv_session *inv_session, pjsip_rx_data *rdata,
int answer_code, int terminate_code, pj_bool_t notify)
{
pjsip_tx_data *tdata = NULL;
int res = 0;
if (inv_session->state != PJSIP_INV_STATE_DISCONNECTED) {
if (pjsip_inv_initial_answer(
inv_session, rdata, answer_code, NULL, NULL, &tdata) != PJ_SUCCESS) {
pjsip_inv_terminate(inv_session, terminate_code ? terminate_code : answer_code, notify);
res = -1;
} else {
pjsip_inv_send_msg(inv_session, tdata);
}
}
if (answer_code >= 300) {
/*
* A session is ending. The dialog has a reference that needs to be
* removed and holds a lock that needs to be unlocked before returning.
*/
pjsip_dlg_dec_lock(inv_session->dlg);
}
return res;
}
/*!
* \internal
* \brief Create and initialize a pjsip invite session
*
* pjsip_inv_session adds, and maintains a reference to the dialog upon a successful
* invite session creation until the session is destroyed. However, we'll wait to
* remove the reference that was added for the dialog when it gets created since we're
* not ready to unlock the dialog in this function.
*
* So, if this function successfully returns that means it returns with its newly
* created, and associated dialog locked and with two references (i.e. dialog's
* reference count should be 2).
*
* \param rdata The request that is starting the dialog
* \param endpoint A pointer to the endpoint
*
* \return A pjsip invite session object
* \retval NULL on error
*/
static pjsip_inv_session *pre_session_setup(pjsip_rx_data *rdata, const struct ast_sip_endpoint *endpoint)
{
pjsip_tx_data *tdata;
pjsip_dialog *dlg;
pjsip_inv_session *inv_session;
unsigned int options = endpoint->extensions.flags;
const pj_str_t STR_100REL = { "100rel", 6};
unsigned int i;
pj_status_t dlg_status = PJ_EUNKNOWN;
/*
* If 100rel is set to "peer_supported" on the endpoint and the peer indicated support for 100rel
* in the Supported header, send 1xx responses reliably by adding PJSIP_INV_REQUIRE_100REL to pjsip_inv_options flags.
*/
if (endpoint->rel100 == AST_SIP_100REL_PEER_SUPPORTED && rdata->msg_info.supported != NULL) {
for (i = 0; i < rdata->msg_info.supported->count; ++i) {
if (pj_stricmp(&rdata->msg_info.supported->values[i], &STR_100REL) == 0) {
options |= PJSIP_INV_REQUIRE_100REL;
break;
}
}
}
if (pjsip_inv_verify_request(rdata, &options, NULL, NULL, ast_sip_get_pjsip_endpoint(), &tdata) != PJ_SUCCESS) {
if (tdata) {
if (pjsip_endpt_send_response2(ast_sip_get_pjsip_endpoint(), rdata, tdata, NULL, NULL) != PJ_SUCCESS) {
pjsip_tx_data_dec_ref(tdata);
}
} else {
pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 500, NULL, NULL, NULL);
}
return NULL;
}
dlg = ast_sip_create_dialog_uas_locked(endpoint, rdata, &dlg_status);
if (!dlg) {
if (dlg_status != PJ_EEXISTS) {
pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 500, NULL, NULL, NULL);
}
return NULL;
}
/*
* The returned dialog holds a lock and has a reference added. Any paths where the
* dialog invite session is not returned must unlock the dialog and remove its reference.
*/
if (pjsip_inv_create_uas(dlg, rdata, NULL, options, &inv_session) != PJ_SUCCESS) {
pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 500, NULL, NULL, NULL);
/*
* The acquired dialog holds a lock, and a reference. Since the dialog is not
* going to be returned here it must first be unlocked and de-referenced. This
* must be done prior to calling dialog termination.
*/
pjsip_dlg_dec_lock(dlg);
pjsip_dlg_terminate(dlg);
return NULL;
}
#if defined(HAVE_PJSIP_REPLACE_MEDIA_STREAM) || defined(PJMEDIA_SDP_NEG_ALLOW_MEDIA_CHANGE)
inv_session->sdp_neg_flags = PJMEDIA_SDP_NEG_ALLOW_MEDIA_CHANGE;
#endif
if (pjsip_dlg_add_usage(dlg, &session_module, NULL) != PJ_SUCCESS) {
/* Dialog's lock and a reference are removed in new_invite_initial_answer */
new_invite_initial_answer(inv_session, rdata, 500, 500, PJ_FALSE);
/* Remove 2nd reference added at inv_session creation */
pjsip_dlg_dec_session(inv_session->dlg, &session_module);
return NULL;
}
return inv_session;
}
struct new_invite {
/*! \brief Session created for the new INVITE */
struct ast_sip_session *session;
/*! \brief INVITE request itself */
pjsip_rx_data *rdata;
};
static int check_sdp_content_type_supported(pjsip_media_type *content_type)
{
pjsip_media_type app_sdp;
pjsip_media_type_init2(&app_sdp, "application", "sdp");
if (!pjsip_media_type_cmp(content_type, &app_sdp, 0)) {
return 1;
}
return 0;
}
static int check_content_disposition_in_multipart(pjsip_multipart_part *part)
{
pjsip_hdr *hdr = part->hdr.next;
static const pj_str_t str_handling_required = {"handling=required", 16};
while (hdr != &part->hdr) {
if (hdr->type == PJSIP_H_OTHER) {
pjsip_generic_string_hdr *generic_hdr = (pjsip_generic_string_hdr*)hdr;
if (!pj_stricmp2(&hdr->name, "Content-Disposition") &&
pj_stristr(&generic_hdr->hvalue, &str_handling_required) &&
!check_sdp_content_type_supported(&part->body->content_type)) {
return 1;
}
}
hdr = hdr->next;
}
return 0;
}
/**
* if there is required media we don't understand, return 1
*/
static int check_content_disposition(pjsip_rx_data *rdata)
{
pjsip_msg_body *body = rdata->msg_info.msg->body;
pjsip_ctype_hdr *ctype_hdr = rdata->msg_info.ctype;
if (body && ctype_hdr &&
ast_sip_is_media_type_in(&ctype_hdr->media, &pjsip_media_type_multipart_mixed,
&pjsip_media_type_multipart_alternative, SENTINEL)) {
pjsip_multipart_part *part = pjsip_multipart_get_first_part(body);
while (part != NULL) {
if (check_content_disposition_in_multipart(part)) {
return 1;
}
part = pjsip_multipart_get_next_part(body, part);
}
}
return 0;
}
static int new_invite(struct new_invite *invite)
{
pjsip_tx_data *tdata = NULL;
pjsip_timer_setting timer;
pjsip_rdata_sdp_info *sdp_info;
pjmedia_sdp_session *local = NULL;
char buffer[AST_SOCKADDR_BUFLEN];
SCOPE_ENTER(3, "%s\n", ast_sip_session_get_name(invite->session));
/* From this point on, any calls to pjsip_inv_terminate have the last argument as PJ_TRUE
* so that we will be notified so we can destroy the session properly
*/
if (invite->session->inv_session->state == PJSIP_INV_STATE_DISCONNECTED) {
ast_trace_log(-1, LOG_ERROR, "%s: Session already DISCONNECTED [reason=%d (%s)]\n",
ast_sip_session_get_name(invite->session),
invite->session->inv_session->cause,
pjsip_get_status_text(invite->session->inv_session->cause)->ptr);
SCOPE_EXIT_RTN_VALUE(-1);
}
switch (get_destination(invite->session, invite->rdata)) {
case SIP_GET_DEST_EXTEN_FOUND:
/* Things worked. Keep going */
break;
case SIP_GET_DEST_UNSUPPORTED_URI:
ast_trace(-1, "%s: Call (%s:%s) to extension '%s' - unsupported uri\n",
ast_sip_session_get_name(invite->session),
invite->rdata->tp_info.transport->type_name,
pj_sockaddr_print(&invite->rdata->pkt_info.src_addr, buffer, sizeof(buffer), 3),
invite->session->exten);
if (pjsip_inv_initial_answer(invite->session->inv_session, invite->rdata, 416, NULL, NULL, &tdata) == PJ_SUCCESS) {
ast_sip_session_send_response(invite->session, tdata);
} else {
pjsip_inv_terminate(invite->session->inv_session, 416, PJ_TRUE);
}
goto end;
case SIP_GET_DEST_EXTEN_PARTIAL:
ast_trace(-1, "%s: Call (%s:%s) to extension '%s' - partial match\n",
ast_sip_session_get_name(invite->session),
invite->rdata->tp_info.transport->type_name,
pj_sockaddr_print(&invite->rdata->pkt_info.src_addr, buffer, sizeof(buffer), 3),
invite->session->exten);
if (pjsip_inv_initial_answer(invite->session->inv_session, invite->rdata, 484, NULL, NULL, &tdata) == PJ_SUCCESS) {
ast_sip_session_send_response(invite->session, tdata);
} else {
pjsip_inv_terminate(invite->session->inv_session, 484, PJ_TRUE);
}
goto end;
case SIP_GET_DEST_EXTEN_NOT_FOUND:
default:
ast_trace_log(-1, LOG_NOTICE, "%s: Call (%s:%s) to extension '%s' rejected because extension not found in context '%s'.\n",
ast_sip_session_get_name(invite->session),
invite->rdata->tp_info.transport->type_name,
pj_sockaddr_print(&invite->rdata->pkt_info.src_addr, buffer, sizeof(buffer), 3),
invite->session->exten,
invite->session->endpoint->context);
if (pjsip_inv_initial_answer(invite->session->inv_session, invite->rdata, 404, NULL, NULL, &tdata) == PJ_SUCCESS) {
ast_sip_session_send_response(invite->session, tdata);
} else {
pjsip_inv_terminate(invite->session->inv_session, 404, PJ_TRUE);
}
goto end;
};
if (check_content_disposition(invite->rdata)) {
if (pjsip_inv_initial_answer(invite->session->inv_session, invite->rdata, 415, NULL, NULL, &tdata) == PJ_SUCCESS) {
ast_sip_session_send_response(invite->session, tdata);
} else {
pjsip_inv_terminate(invite->session->inv_session, 415, PJ_TRUE);
}
goto end;
}
pjsip_timer_setting_default(&timer);
timer.min_se = invite->session->endpoint->extensions.timer.min_se;
timer.sess_expires = invite->session->endpoint->extensions.timer.sess_expires;
pjsip_timer_init_session(invite->session->inv_session, &timer);
/*
* At this point, we've verified what we can that won't take awhile,
* so let's go ahead and send a 100 Trying out to stop any
* retransmissions.
*/
if (pjsip_inv_initial_answer(invite->session->inv_session, invite->rdata, 100, NULL, NULL, &tdata) != PJ_SUCCESS) {
if (tdata) {
pjsip_inv_send_msg(invite->session->inv_session, tdata);
} else {
pjsip_inv_terminate(invite->session->inv_session, 500, PJ_TRUE);
}
goto end;
}
ast_trace(-1, "%s: Call (%s:%s) to extension '%s' sending 100 Trying\n",
ast_sip_session_get_name(invite->session),
invite->rdata->tp_info.transport->type_name,
pj_sockaddr_print(&invite->rdata->pkt_info.src_addr, buffer, sizeof(buffer), 3),
invite->session->exten);
ast_sip_session_send_response(invite->session, tdata);
sdp_info = pjsip_rdata_get_sdp_info(invite->rdata);
if (sdp_info && (sdp_info->sdp_err == PJ_SUCCESS) && sdp_info->sdp) {
if (handle_incoming_sdp(invite->session, sdp_info->sdp)) {
tdata = NULL;
if (pjsip_inv_end_session(invite->session->inv_session, 488, NULL, &tdata) == PJ_SUCCESS
&& tdata) {
ast_sip_session_send_response(invite->session, tdata);
}
goto end;
}
/* We are creating a local SDP which is an answer to their offer */
local = create_local_sdp(invite->session->inv_session, invite->session, sdp_info->sdp, 0);
} else {
/* We are creating a local SDP which is an offer */
local = create_local_sdp(invite->session->inv_session, invite->session, NULL, 0);
}
/* If we were unable to create a local SDP terminate the session early, it won't go anywhere */
if (!local) {
tdata = NULL;
if (pjsip_inv_end_session(invite->session->inv_session, 500, NULL, &tdata) == PJ_SUCCESS
&& tdata) {
ast_sip_session_send_response(invite->session, tdata);
}
goto end;
}
pjsip_inv_set_local_sdp(invite->session->inv_session, local);
pjmedia_sdp_neg_set_prefer_remote_codec_order(invite->session->inv_session->neg, PJ_FALSE);
#ifdef PJMEDIA_SDP_NEG_ANSWER_MULTIPLE_CODECS
if (!invite->session->endpoint->preferred_codec_only) {
pjmedia_sdp_neg_set_answer_multiple_codecs(invite->session->inv_session->neg, PJ_TRUE);
}
#endif
handle_incoming_request(invite->session, invite->rdata);
end:
SCOPE_EXIT_RTN_VALUE(0, "%s\n", ast_sip_session_get_name(invite->session));
}
static void handle_new_invite_request(pjsip_rx_data *rdata)
{
RAII_VAR(struct ast_sip_endpoint *, endpoint,
ast_pjsip_rdata_get_endpoint(rdata), ao2_cleanup);
pjsip_inv_session *inv_session = NULL;
struct ast_sip_session *session;
struct new_invite invite;
char *req_uri = TRACE_ATLEAST(1) ? ast_alloca(256) : "";
int res = TRACE_ATLEAST(1) ? pjsip_uri_print(PJSIP_URI_IN_REQ_URI, rdata->msg_info.msg->line.req.uri, req_uri, 256) : 0;
SCOPE_ENTER(1, "Request: %s\n", res ? req_uri : "");
ast_assert(endpoint != NULL);
inv_session = pre_session_setup(rdata, endpoint);
if (!inv_session) {
/* pre_session_setup() returns a response on failure */
SCOPE_EXIT_RTN("Failure in pre session setup\n");
}
/*
* Upon a successful pre_session_setup the associated dialog is returned locked
* and with an added reference. Well actually two references. One added when the
* dialog itself was created, and another added when the pjsip invite session was
* created and the dialog was added to it.
*
* In order to ensure the dialog's, and any of its internal attributes, lifetimes
* we'll hold the lock and maintain the reference throughout the entire new invite
* handling process. See ast_sip_create_dialog_uas_locked for more details but,
* basically we do this to make sure a transport failure does not destroy the dialog
* and/or transaction out from underneath us between pjsip calls. Alternatively, we
* could probably release the lock if we needed to, but then we'd have to re-lock and
* check the dialog and transaction prior to every pjsip call.
*
* That means any off nominal/failure paths in this function must remove the associated
* dialog reference added at dialog creation, and remove the lock. As well the
* referenced pjsip invite session must be "cleaned up", which should also then
* remove its reference to the dialog at that time.
*
* Nominally we'll unlock the dialog, and release the reference when all new invite
* process handling has successfully completed.
*/
session = ast_sip_session_alloc(endpoint, NULL, inv_session, rdata);
if (!session) {
/* Dialog's lock and reference are removed in new_invite_initial_answer */
if (!new_invite_initial_answer(inv_session, rdata, 500, 500, PJ_FALSE)) {
/* Terminate the session if it wasn't done in the answer */
pjsip_inv_terminate(inv_session, 500, PJ_FALSE);
}
SCOPE_EXIT_RTN("Couldn't create session\n");
}
session->call_direction = AST_SIP_SESSION_INCOMING_CALL;
/*
* The current thread is supposed be the session serializer to prevent
* any initial INVITE retransmissions from trying to setup the same
* call again.
*/
ast_assert(ast_taskprocessor_is_task(session->serializer));
invite.session = session;
invite.rdata = rdata;
new_invite(&invite);
/*
* The dialog lock and reference added at dialog creation time must be
* maintained throughout the new invite process. Since we're pretty much
* done at this point with things it's safe to go ahead and remove the lock
* and the reference here. See ast_sip_create_dialog_uas_locked for more info.
*
* Note, any future functionality added that does work using the dialog must
* be done before this.
*/
pjsip_dlg_dec_lock(inv_session->dlg);
SCOPE_EXIT("Request: %s Session: %s\n", req_uri, ast_sip_session_get_name(session));
ao2_ref(session, -1);
}
static pj_bool_t does_method_match(const pj_str_t *message_method, const char *supplement_method)
{
pj_str_t method;
if (ast_strlen_zero(supplement_method)) {
return PJ_TRUE;
}
pj_cstr(&method, supplement_method);
return pj_stristr(&method, message_method) ? PJ_TRUE : PJ_FALSE;
}
static pj_bool_t has_supplement(const struct ast_sip_session *session, const pjsip_rx_data *rdata)
{
struct ast_sip_session_supplement *supplement;
struct pjsip_method *method = &rdata->msg_info.msg->line.req.method;
if (!session) {
return PJ_FALSE;
}
AST_LIST_TRAVERSE(&session->supplements, supplement, next) {
if (does_method_match(&method->name, supplement->method)) {
return PJ_TRUE;
}
}
return PJ_FALSE;
}
/*!
* \internal
* Added for debugging purposes
*/
static void session_on_tsx_state(pjsip_transaction *tsx, pjsip_event *e)
{
pjsip_dialog *dlg = pjsip_tsx_get_dlg(tsx);
pjsip_inv_session *inv_session = (dlg ? pjsip_dlg_get_inv_session(dlg) : NULL);
struct ast_sip_session *session = (inv_session ? inv_session->mod_data[session_module.id] : NULL);
SCOPE_ENTER(1, "%s TSX State: %s Inv State: %s\n", ast_sip_session_get_name(session),
pjsip_tsx_state_str(tsx->state), inv_session ? pjsip_inv_state_name(inv_session->state) : "unknown");
if (session) {
ast_trace(2, "Topology: Pending: %s Active: %s\n",
ast_str_tmp(256, ast_stream_topology_to_str(session->pending_media_state->topology, &STR_TMP)),
ast_str_tmp(256, ast_stream_topology_to_str(session->active_media_state->topology, &STR_TMP)));
}
SCOPE_EXIT_RTN();
}
/*!
* \internal
* Added for debugging purposes
*/
static pj_bool_t session_on_rx_response(pjsip_rx_data *rdata)
{
struct pjsip_status_line status = rdata->msg_info.msg->line.status;
pjsip_dialog *dlg = pjsip_rdata_get_dlg(rdata);
pjsip_inv_session *inv_session = dlg ? pjsip_dlg_get_inv_session(dlg) : NULL;
struct ast_sip_session *session = (inv_session ? inv_session->mod_data[session_module.id] : NULL);
SCOPE_ENTER(1, "%s Method: %.*s Status: %d\n", ast_sip_session_get_name(session),
(int)rdata->msg_info.cseq->method.name.slen, rdata->msg_info.cseq->method.name.ptr, status.code);
SCOPE_EXIT_RTN_VALUE(PJ_FALSE);
}
/*!
* \brief Called when a new SIP request comes into PJSIP
*
* This function is called under two circumstances
* 1) An out-of-dialog request is received by PJSIP
* 2) An in-dialog request that the inv_session layer does not
* handle is received (such as an in-dialog INFO)
*
* Except for INVITEs, there is very little we actually do in this function
* 1) For requests we don't handle, we return PJ_FALSE
* 2) For new INVITEs, handle them now to prevent retransmissions from
* trying to setup the same call again.
* 3) For in-dialog requests we handle, we process them in the
* .on_state_changed = session_inv_on_state_changed or
* .on_tsx_state_changed = session_inv_on_tsx_state_changed
* callbacks instead.
*/
static pj_bool_t session_on_rx_request(pjsip_rx_data *rdata)
{
pj_status_t handled = PJ_FALSE;
struct pjsip_request_line req = rdata->msg_info.msg->line.req;
pjsip_dialog *dlg = pjsip_rdata_get_dlg(rdata);
pjsip_inv_session *inv_session = (dlg ? pjsip_dlg_get_inv_session(dlg) : NULL);
struct ast_sip_session *session = (inv_session ? inv_session->mod_data[session_module.id] : NULL);
char *req_uri = TRACE_ATLEAST(1) ? ast_alloca(256) : "";
int res = TRACE_ATLEAST(1) ? pjsip_uri_print(PJSIP_URI_IN_REQ_URI, rdata->msg_info.msg->line.req.uri, req_uri, 256) : 0;
SCOPE_ENTER(1, "%s Request: %.*s %s\n", ast_sip_session_get_name(session),
(int) pj_strlen(&req.method.name), pj_strbuf(&req.method.name), res ? req_uri : "");
switch (req.method.id) {
case PJSIP_INVITE_METHOD:
if (dlg) {
ast_log(LOG_WARNING, "on_rx_request called for INVITE in mid-dialog?\n");
break;
}
handled = PJ_TRUE;
handle_new_invite_request(rdata);
break;
default:
/* Handle other in-dialog methods if their supplements have been registered */
handled = dlg && (inv_session = pjsip_dlg_get_inv_session(dlg)) &&
has_supplement(inv_session->mod_data[session_module.id], rdata);
break;
}
SCOPE_EXIT_RTN_VALUE(handled, "%s Handled request %.*s %s ? %s\n", ast_sip_session_get_name(session),
(int) pj_strlen(&req.method.name), pj_strbuf(&req.method.name), req_uri,
handled == PJ_TRUE ? "yes" : "no");
}
static pj_bool_t session_on_tx_response(pjsip_tx_data *tdata)
{
pjsip_dialog *dlg = pjsip_tdata_get_dlg(tdata);
RAII_VAR(struct ast_sip_session *, session, dlg ? ast_sip_dialog_get_session(dlg) : NULL, ao2_cleanup);
if (session) {
handle_outgoing_response(session, tdata);
}
return PJ_SUCCESS;
}
static void resend_reinvite(pj_timer_heap_t *timer, pj_timer_entry *entry)
{
struct ast_sip_session *session = entry->user_data;
ast_debug(3, "%s: re-INVITE collision timer expired.\n",
ast_sip_session_get_name(session));
if (AST_LIST_EMPTY(&session->delayed_requests)) {
/* No delayed request pending, so just return */
ao2_ref(session, -1);
return;
}
if (ast_sip_push_task(session->serializer, invite_collision_timeout, session)) {
/*
* Uh oh. We now have nothing in the foreseeable future
* to trigger sending the delayed requests.
*/
ao2_ref(session, -1);
}
}
static void reschedule_reinvite(struct ast_sip_session *session, ast_sip_session_response_cb on_response)
{
pjsip_inv_session *inv = session->inv_session;
pj_time_val tv;
struct ast_sip_session_media_state *pending_media_state = NULL;
struct ast_sip_session_media_state *active_media_state = NULL;
const char *session_name = ast_sip_session_get_name(session);
int use_pending = 0;
int use_active = 0;
SCOPE_ENTER(3, "%s\n", session_name);
/*
* If the two media state topologies are the same this means that the session refresh request
* did not specify a desired topology, so it does not care. If that is the case we don't even
* pass one in here resulting in the current topology being used. It's possible though that
* either one of the topologies could be NULL so we have to test for that before we check for
* equality.
*/
/* We only want to clone a media state if its topology is not null */
use_pending = session->pending_media_state->topology != NULL;
use_active = session->active_media_state->topology != NULL;
/*
* If both media states have topologies, we can test for equality. If they're equal we're not going to
* clone either states.
*/
if (use_pending && use_active && ast_stream_topology_equal(session->active_media_state->topology, session->pending_media_state->topology)) {
use_pending = 0;
use_active = 0;
}
if (use_pending) {
pending_media_state = ast_sip_session_media_state_clone(session->pending_media_state);
if (!pending_media_state) {
SCOPE_EXIT_LOG_RTN(LOG_ERROR, "%s: Failed to clone pending media state\n", session_name);
}
}
if (use_active) {
active_media_state = ast_sip_session_media_state_clone(session->active_media_state);
if (!active_media_state) {
ast_sip_session_media_state_free(pending_media_state);
SCOPE_EXIT_LOG_RTN(LOG_ERROR, "%s: Failed to clone active media state\n", session_name);
}
}
if (delay_request(session, NULL, NULL, on_response, 1, DELAYED_METHOD_INVITE, pending_media_state,
active_media_state, 1)) {
ast_sip_session_media_state_free(pending_media_state);
ast_sip_session_media_state_free(active_media_state);
SCOPE_EXIT_LOG_RTN(LOG_ERROR, "%s: Failed to add delayed request\n", session_name);
}
if (pj_timer_entry_running(&session->rescheduled_reinvite)) {
/* Timer already running. Something weird is going on. */
SCOPE_EXIT_LOG_RTN(LOG_ERROR, "%s: re-INVITE collision while timer running!!!\n", session_name);
}
tv.sec = 0;
if (inv->role == PJSIP_ROLE_UAC) {
tv.msec = 2100 + ast_random() % 2000;
} else {
tv.msec = ast_random() % 2000;
}
pj_timer_entry_init(&session->rescheduled_reinvite, 0, session, resend_reinvite);
ao2_ref(session, +1);
if (pjsip_endpt_schedule_timer(ast_sip_get_pjsip_endpoint(),
&session->rescheduled_reinvite, &tv) != PJ_SUCCESS) {
ao2_ref(session, -1);
SCOPE_EXIT_LOG_RTN(LOG_ERROR, "%s: Couldn't schedule timer\n", session_name);
}
SCOPE_EXIT_RTN();
}
static void __print_debug_details(const char *function, pjsip_inv_session *inv, pjsip_transaction *tsx, pjsip_event *e)
{
int id = session_module.id;
struct ast_sip_session *session = NULL;
if (!DEBUG_ATLEAST(5)) {
/* Debug not spamy enough */
return;
}
ast_log(LOG_DEBUG, "Function %s called on event %s\n",
function, pjsip_event_str(e->type));
if (!inv) {
ast_log(LOG_DEBUG, "Transaction %p does not belong to an inv_session?\n", tsx);
ast_log(LOG_DEBUG, "The transaction state is %s\n",
pjsip_tsx_state_str(tsx->state));
return;
}
if (id > -1) {
session = inv->mod_data[session_module.id];
}
if (!session) {
ast_log(LOG_DEBUG, "inv_session %p has no ast session\n", inv);
} else {
ast_log(LOG_DEBUG, "The state change pertains to the endpoint '%s(%s)'\n",
ast_sorcery_object_get_id(session->endpoint),
session->channel ? ast_channel_name(session->channel) : "");
}
if (inv->invite_tsx) {
ast_log(LOG_DEBUG, "The inv session still has an invite_tsx (%p)\n",
inv->invite_tsx);
} else {
ast_log(LOG_DEBUG, "The inv session does NOT have an invite_tsx\n");
}
if (tsx) {
ast_log(LOG_DEBUG, "The %s %.*s transaction involved in this state change is %p\n",
pjsip_role_name(tsx->role),
(int) pj_strlen(&tsx->method.name), pj_strbuf(&tsx->method.name),
tsx);
ast_log(LOG_DEBUG, "The current transaction state is %s\n",
pjsip_tsx_state_str(tsx->state));
ast_log(LOG_DEBUG, "The transaction state change event is %s\n",
pjsip_event_str(e->body.tsx_state.type));
} else {
ast_log(LOG_DEBUG, "There is no transaction involved in this state change\n");
}
ast_log(LOG_DEBUG, "The current inv state is %s\n", pjsip_inv_state_name(inv->state));
}
#define print_debug_details(inv, tsx, e) __print_debug_details(__PRETTY_FUNCTION__, (inv), (tsx), (e))
static void handle_incoming_request(struct ast_sip_session *session, pjsip_rx_data *rdata)
{
struct ast_sip_session_supplement *supplement;
struct pjsip_request_line req = rdata->msg_info.msg->line.req;
SCOPE_ENTER(3, "%s: Method is %.*s\n", ast_sip_session_get_name(session), (int) pj_strlen(&req.method.name), pj_strbuf(&req.method.name));
AST_LIST_TRAVERSE(&session->supplements, supplement, next) {
if (supplement->incoming_request && does_method_match(&req.method.name, supplement->method)) {
if (supplement->incoming_request(session, rdata)) {
break;
}
}
}
SCOPE_EXIT("%s\n", ast_sip_session_get_name(session));
}
static void handle_session_begin(struct ast_sip_session *session)
{
struct ast_sip_session_supplement *iter;
AST_LIST_TRAVERSE(&session->supplements, iter, next) {
if (iter->session_begin) {
iter->session_begin(session);
}
}
}
static void handle_session_destroy(struct ast_sip_session *session)
{
struct ast_sip_session_supplement *iter;
AST_LIST_TRAVERSE(&session->supplements, iter, next) {
if (iter->session_destroy) {
iter->session_destroy(session);
}
}
}
static void handle_session_end(struct ast_sip_session *session)
{
struct ast_sip_session_supplement *iter;
/* Session is dead. Notify the supplements. */
AST_LIST_TRAVERSE(&session->supplements, iter, next) {
if (iter->session_end) {
iter->session_end(session);
}
}
}
static void handle_incoming_response(struct ast_sip_session *session, pjsip_rx_data *rdata,
enum ast_sip_session_response_priority response_priority)
{
struct ast_sip_session_supplement *supplement;
struct pjsip_status_line status = rdata->msg_info.msg->line.status;
SCOPE_ENTER(3, "%s: Response is %d %.*s\n", ast_sip_session_get_name(session),
status.code, (int) pj_strlen(&status.reason), pj_strbuf(&status.reason));
AST_LIST_TRAVERSE(&session->supplements, supplement, next) {
if (!(supplement->response_priority & response_priority)) {
continue;
}
if (supplement->incoming_response && does_method_match(&rdata->msg_info.cseq->method.name, supplement->method)) {
supplement->incoming_response(session, rdata);
}
}
SCOPE_EXIT("%s\n", ast_sip_session_get_name(session));
}
static int handle_incoming(struct ast_sip_session *session, pjsip_rx_data *rdata,
enum ast_sip_session_response_priority response_priority)
{
if (rdata->msg_info.msg->type == PJSIP_REQUEST_MSG) {
handle_incoming_request(session, rdata);
} else {
handle_incoming_response(session, rdata, response_priority);
}
return 0;
}
static void handle_outgoing_request(struct ast_sip_session *session, pjsip_tx_data *tdata)
{
struct ast_sip_session_supplement *supplement;
struct pjsip_request_line req = tdata->msg->line.req;
SCOPE_ENTER(3, "%s: Method is %.*s\n", ast_sip_session_get_name(session),
(int) pj_strlen(&req.method.name), pj_strbuf(&req.method.name));
ast_sip_message_apply_transport(session->endpoint->transport, tdata);
AST_LIST_TRAVERSE(&session->supplements, supplement, next) {
if (supplement->outgoing_request && does_method_match(&req.method.name, supplement->method)) {
supplement->outgoing_request(session, tdata);
}
}
SCOPE_EXIT("%s\n", ast_sip_session_get_name(session));
}
static void handle_outgoing_response(struct ast_sip_session *session, pjsip_tx_data *tdata)
{
struct ast_sip_session_supplement *supplement;
struct pjsip_status_line status = tdata->msg->line.status;
pjsip_cseq_hdr *cseq = pjsip_msg_find_hdr(tdata->msg, PJSIP_H_CSEQ, NULL);
SCOPE_ENTER(3, "%s: Method is %.*s, Response is %d %.*s\n", ast_sip_session_get_name(session),
(int) pj_strlen(&cseq->method.name),
pj_strbuf(&cseq->method.name), status.code, (int) pj_strlen(&status.reason),
pj_strbuf(&status.reason));
if (!cseq) {
SCOPE_EXIT_LOG_RTN(LOG_ERROR, "%s: Cannot send response due to missing sequence header",
ast_sip_session_get_name(session));
}
ast_sip_message_apply_transport(session->endpoint->transport, tdata);
AST_LIST_TRAVERSE(&session->supplements, supplement, next) {
if (supplement->outgoing_response && does_method_match(&cseq->method.name, supplement->method)) {
supplement->outgoing_response(session, tdata);
}
}
SCOPE_EXIT("%s\n", ast_sip_session_get_name(session));
}
static int session_end(void *vsession)
{
struct ast_sip_session *session = vsession;
/* Stop the scheduled termination */
sip_session_defer_termination_stop_timer(session);
/* Session is dead. Notify the supplements. */
handle_session_end(session);
return 0;
}
/*!
* \internal
* \brief Complete ending session activities.
* \since 13.5.0
*
* \param vsession Which session to complete stopping.
*
* \retval 0 on success.
* \retval -1 on error.
*/
static int session_end_completion(void *vsession)
{
struct ast_sip_session *session = vsession;
ast_sip_dialog_set_serializer(session->inv_session->dlg, NULL);
ast_sip_dialog_set_endpoint(session->inv_session->dlg, NULL);
/* Now we can release the ref that was held by session->inv_session */
ao2_cleanup(session);
return 0;
}
static int check_request_status(pjsip_inv_session *inv, pjsip_event *e)
{
struct ast_sip_session *session = inv->mod_data[session_module.id];
pjsip_transaction *tsx = e->body.tsx_state.tsx;
if (tsx->status_code != 503 && tsx->status_code != 408) {
return 0;
}
if (!ast_sip_failover_request(tsx->last_tx)) {
return 0;
}
pjsip_inv_uac_restart(inv, PJ_FALSE);
/*
* Bump the ref since it will be on a new transaction and
* we don't want it to go away along with the old transaction.
*/
pjsip_tx_data_add_ref(tsx->last_tx);
ast_sip_session_send_request(session, tsx->last_tx);
return 1;
}
static void handle_incoming_before_media(pjsip_inv_session *inv,
struct ast_sip_session *session, pjsip_rx_data *rdata)
{
pjsip_msg *msg;
ast_debug(3, "%s: Received %s\n", ast_sip_session_get_name(session), rdata->msg_info.msg->type == PJSIP_REQUEST_MSG ?
"request" : "response");
handle_incoming(session, rdata, AST_SIP_SESSION_BEFORE_MEDIA);
msg = rdata->msg_info.msg;
if (msg->type == PJSIP_REQUEST_MSG
&& msg->line.req.method.id == PJSIP_ACK_METHOD
&& pjmedia_sdp_neg_get_state(inv->neg) != PJMEDIA_SDP_NEG_STATE_DONE) {
pjsip_tx_data *tdata;
/*
* SDP negotiation failed on an incoming call that delayed
* negotiation and then gave us an invalid SDP answer. We
* need to send a BYE to end the call because of the invalid
* SDP answer.
*/
ast_debug(1,
"%s: Ending session due to incomplete SDP negotiation. %s\n",
ast_sip_session_get_name(session),
pjsip_rx_data_get_info(rdata));
if (pjsip_inv_end_session(inv, 400, NULL, &tdata) == PJ_SUCCESS
&& tdata) {
ast_sip_session_send_request(session, tdata);
}
}
}
static void session_inv_on_state_changed(pjsip_inv_session *inv, pjsip_event *e)
{
pjsip_event_id_e type;
struct ast_sip_session *session = inv->mod_data[session_module.id];
SCOPE_ENTER(1, "%s Event: %s Inv State: %s\n", ast_sip_session_get_name(session),
pjsip_event_str(e->type), pjsip_inv_state_name(inv->state));
if (ast_shutdown_final()) {
SCOPE_EXIT_RTN("Shutting down\n");
}
if (e) {
print_debug_details(inv, NULL, e);
type = e->type;
} else {
type = PJSIP_EVENT_UNKNOWN;
}
session = inv->mod_data[session_module.id];
if (!session) {
SCOPE_EXIT_RTN("No session\n");
}
switch(type) {
case PJSIP_EVENT_TX_MSG:
break;
case PJSIP_EVENT_RX_MSG:
handle_incoming_before_media(inv, session, e->body.rx_msg.rdata);
break;
case PJSIP_EVENT_TSX_STATE:
ast_debug(3, "%s: Source of transaction state change is %s\n", ast_sip_session_get_name(session),
pjsip_event_str(e->body.tsx_state.type));
/* Transaction state changes are prompted by some other underlying event. */
switch(e->body.tsx_state.type) {
case PJSIP_EVENT_TX_MSG:
break;
case PJSIP_EVENT_RX_MSG:
if (!check_request_status(inv, e)) {
handle_incoming_before_media(inv, session, e->body.tsx_state.src.rdata);
}
break;
case PJSIP_EVENT_TRANSPORT_ERROR:
case PJSIP_EVENT_TIMER:
/*
* Check the request status on transport error or timeout. A transport
* error can occur when a TCP socket closes and that can be the result
* of a 503. Also we may need to failover on a timeout (408).
*/
check_request_status(inv, e);
break;
case PJSIP_EVENT_USER:
case PJSIP_EVENT_UNKNOWN:
case PJSIP_EVENT_TSX_STATE:
/* Inception? */
break;
}
break;
case PJSIP_EVENT_TRANSPORT_ERROR:
case PJSIP_EVENT_TIMER:
case PJSIP_EVENT_UNKNOWN:
case PJSIP_EVENT_USER:
default:
break;
}
if (inv->state == PJSIP_INV_STATE_DISCONNECTED) {
if (session->defer_end) {
ast_debug(3, "%s: Deferring session end\n", ast_sip_session_get_name(session));
session->ended_while_deferred = 1;
SCOPE_EXIT_RTN("Deferring\n");
}
if (ast_sip_push_task(session->serializer, session_end, session)) {
/* Do it anyway even though this is not the right thread. */
session_end(session);
}
}
SCOPE_EXIT_RTN();
}
static void session_inv_on_new_session(pjsip_inv_session *inv, pjsip_event *e)
{
/* XXX STUB */
}
static int session_end_if_disconnected(int id, pjsip_inv_session *inv)
{
struct ast_sip_session *session;
if (inv->state != PJSIP_INV_STATE_DISCONNECTED) {
return 0;
}
/*
* We are locking because ast_sip_dialog_get_session() needs
* the dialog locked to get the session by other threads.
*/
pjsip_dlg_inc_lock(inv->dlg);
session = inv->mod_data[id];
inv->mod_data[id] = NULL;
pjsip_dlg_dec_lock(inv->dlg);
/*
* Pass the session ref held by session->inv_session to
* session_end_completion().
*/
if (session
&& ast_sip_push_task(session->serializer, session_end_completion, session)) {
/* Do it anyway even though this is not the right thread. */
session_end_completion(session);
}
return 1;
}
static void session_inv_on_tsx_state_changed(pjsip_inv_session *inv, pjsip_transaction *tsx, pjsip_event *e)
{
ast_sip_session_response_cb cb;
int id = session_module.id;
pjsip_tx_data *tdata;
struct ast_sip_session *session = inv->mod_data[session_module.id];
SCOPE_ENTER(1, "%s TSX State: %s Inv State: %s\n", ast_sip_session_get_name(session),
pjsip_tsx_state_str(tsx->state), pjsip_inv_state_name(inv->state));
if (ast_shutdown_final()) {
SCOPE_EXIT_RTN("Shutting down\n");
}
session = inv->mod_data[id];
print_debug_details(inv, tsx, e);
if (!session) {
/* The session has ended. Ignore the transaction change. */
SCOPE_EXIT_RTN("Session ended\n");
}
/*
* If the session is disconnected really nothing else to do unless currently transacting
* a BYE. If a BYE then hold off destruction until the transaction timeout occurs. This
* has to be done for BYEs because sometimes the dialog can be in a disconnected
* state but the BYE request transaction has not yet completed.
*/
if (tsx->method.id != PJSIP_BYE_METHOD && session_end_if_disconnected(id, inv)) {
SCOPE_EXIT_RTN("Disconnected\n");
}
switch (e->body.tsx_state.type) {
case PJSIP_EVENT_TX_MSG:
/* When we create an outgoing request, we do not have access to the transaction that
* is created. Instead, We have to place transaction-specific data in the tdata. Here,
* we transfer the data into the transaction. This way, when we receive a response, we
* can dig this data out again
*/
tsx->mod_data[id] = e->body.tsx_state.src.tdata->mod_data[id];
break;
case PJSIP_EVENT_RX_MSG:
cb = ast_sip_mod_data_get(tsx->mod_data, id, MOD_DATA_ON_RESPONSE);
/* As the PJSIP invite session implementation responds with a 200 OK before we have a
* chance to be invoked session supplements for BYE requests actually end up executing
* in the invite session state callback as well. To prevent session supplements from
* running on the BYE request again we explicitly squash invocation of them here.
*/
if ((e->body.tsx_state.src.rdata->msg_info.msg->type != PJSIP_REQUEST_MSG) ||
(tsx->method.id != PJSIP_BYE_METHOD)) {
handle_incoming(session, e->body.tsx_state.src.rdata,
AST_SIP_SESSION_AFTER_MEDIA);
}
if (tsx->method.id == PJSIP_INVITE_METHOD) {
if (tsx->role == PJSIP_ROLE_UAC) {
if (tsx->state == PJSIP_TSX_STATE_COMPLETED) {
/* This means we got a non 2XX final response to our outgoing INVITE */
if (tsx->status_code == PJSIP_SC_REQUEST_PENDING) {
reschedule_reinvite(session, cb);
SCOPE_EXIT_RTN("Non 2XX final response\n");
}
if (inv->state == PJSIP_INV_STATE_CONFIRMED) {
ast_debug(1, "%s: reINVITE received final response code %d\n",
ast_sip_session_get_name(session),
tsx->status_code);
if ((tsx->status_code == 401 || tsx->status_code == 407
|| (session->endpoint->security_negotiation && tsx->status_code == 494))
&& ++session->authentication_challenge_count < MAX_RX_CHALLENGES
&& !ast_sip_create_request_with_auth(
&session->endpoint->outbound_auths,
e->body.tsx_state.src.rdata, tsx->last_tx, &tdata)) {
/* Send authed reINVITE */
ast_sip_session_send_request_with_cb(session, tdata, cb);
SCOPE_EXIT_RTN("Sending authed reinvite\n");
}
/* Per RFC3261 14.1 a response to a re-INVITE should only terminate
* the dialog if a 481 or 408 occurs. All other responses should leave
* the dialog untouched.
*/
if (tsx->status_code == 481 || tsx->status_code == 408) {
if (pjsip_inv_end_session(inv, 500, NULL, &tdata) == PJ_SUCCESS
&& tdata) {
ast_sip_session_send_request(session, tdata);
}
}
}
} else if (tsx->state == PJSIP_TSX_STATE_TERMINATED) {
if (!inv->cancelling
&& inv->role == PJSIP_ROLE_UAC
&& inv->state == PJSIP_INV_STATE_CONFIRMED
&& pjmedia_sdp_neg_was_answer_remote(inv->neg)
&& pjmedia_sdp_neg_get_state(inv->neg) == PJMEDIA_SDP_NEG_STATE_DONE
&& (session->channel && ast_channel_hangupcause(session->channel) == AST_CAUSE_BEARERCAPABILITY_NOTAVAIL)
) {
/*
* We didn't send a CANCEL but the UAS sent us the 200 OK with an invalid or unacceptable codec SDP.
* In this case the SDP negotiation is incomplete and PJPROJECT has already sent the ACK.
* So, we send the BYE with 503 status code here. And the actual hangup cause code is already set
* to AST_CAUSE_BEARERCAPABILITY_NOTAVAIL by the session_inv_on_media_update(), setting the 503
* status code doesn't affect to hangup cause code.
*/
ast_debug(1, "Endpoint '%s(%s)': Ending session due to 200 OK with incomplete SDP negotiation. %s\n",
ast_sorcery_object_get_id(session->endpoint),
session->channel ? ast_channel_name(session->channel) : "",
pjsip_rx_data_get_info(e->body.tsx_state.src.rdata));
pjsip_inv_end_session(session->inv_session, 503, NULL, &tdata);
SCOPE_EXIT_RTN("Incomplete SDP negotiation\n");
}
if (inv->cancelling && tsx->status_code == PJSIP_SC_OK) {
int sdp_negotiation_done =
pjmedia_sdp_neg_get_state(inv->neg) == PJMEDIA_SDP_NEG_STATE_DONE;
/*
* We can get here for the following reasons.
*
* 1) The race condition detailed in RFC5407 section 3.1.2.
* We sent a CANCEL at the same time that the UAS sent us a
* 200 OK with a valid SDP for the original INVITE. As a
* result, we have now received a 200 OK for a cancelled
* call and the SDP negotiation is complete. We need to
* immediately send a BYE to end the dialog.
*
* 2) We sent a CANCEL and hit the race condition but the
* UAS sent us an invalid SDP with the 200 OK. In this case
* the SDP negotiation is incomplete and PJPROJECT has
* already sent the BYE for us because of the invalid SDP.
*/
ast_test_suite_event_notify("PJSIP_SESSION_CANCELED",
"Endpoint: %s\r\n"
"Channel: %s\r\n"
"Message: %s\r\n"
"SDP: %s",
ast_sorcery_object_get_id(session->endpoint),
session->channel ? ast_channel_name(session->channel) : "",
pjsip_rx_data_get_info(e->body.tsx_state.src.rdata),
sdp_negotiation_done ? "complete" : "incomplete");
if (!sdp_negotiation_done) {
ast_debug(1, "%s: Incomplete SDP negotiation cancelled session. %s\n",
ast_sip_session_get_name(session),
pjsip_rx_data_get_info(e->body.tsx_state.src.rdata));
} else if (pjsip_inv_end_session(inv, 500, NULL, &tdata) == PJ_SUCCESS
&& tdata) {
ast_debug(1, "%s: Ending session due to RFC5407 race condition. %s\n",
ast_sip_session_get_name(session),
pjsip_rx_data_get_info(e->body.tsx_state.src.rdata));
ast_sip_session_send_request(session, tdata);
}
}
}
}
} else {
/* All other methods */
if (tsx->role == PJSIP_ROLE_UAC) {
if (tsx->state == PJSIP_TSX_STATE_COMPLETED) {
/* This means we got a final response to our outgoing method */
ast_debug(1, "%s: %.*s received final response code %d\n",
ast_sip_session_get_name(session),
(int) pj_strlen(&tsx->method.name), pj_strbuf(&tsx->method.name),
tsx->status_code);
if ((tsx->status_code == 401 || tsx->status_code == 407 || tsx->status_code == 494)
&& ++session->authentication_challenge_count < MAX_RX_CHALLENGES
&& !ast_sip_create_request_with_auth(
&session->endpoint->outbound_auths,
e->body.tsx_state.src.rdata, tsx->last_tx, &tdata)) {
/* Send authed version of the method */
ast_sip_session_send_request_with_cb(session, tdata, cb);
SCOPE_EXIT_RTN("Sending authed %.*s\n",
(int) pj_strlen(&tsx->method.name), pj_strbuf(&tsx->method.name));
}
}
}
}
if (cb) {
cb(session, e->body.tsx_state.src.rdata);
}
break;
case PJSIP_EVENT_TRANSPORT_ERROR:
case PJSIP_EVENT_TIMER:
/*
* The timer event is run by the pjsip monitor thread and not
* by the session serializer.
*/
if (session_end_if_disconnected(id, inv)) {
SCOPE_EXIT_RTN("Disconnected\n");
}
break;
case PJSIP_EVENT_USER:
case PJSIP_EVENT_UNKNOWN:
case PJSIP_EVENT_TSX_STATE:
/* Inception? */
break;
}
if (AST_LIST_EMPTY(&session->delayed_requests)) {
/* No delayed request pending, so just return */
SCOPE_EXIT_RTN("Nothing delayed\n");
}
if (tsx->method.id == PJSIP_INVITE_METHOD) {
if (tsx->state == PJSIP_TSX_STATE_PROCEEDING) {
ast_debug(3, "%s: INVITE delay check. tsx-state:%s\n",
ast_sip_session_get_name(session),
pjsip_tsx_state_str(tsx->state));
check_delayed_requests(session, invite_proceeding);
} else if (tsx->state == PJSIP_TSX_STATE_TERMINATED) {
/*
* Terminated INVITE transactions always should result in
* queuing delayed requests, no matter what event caused
* the transaction to terminate.
*/
ast_debug(3, "%s: INVITE delay check. tsx-state:%s\n",
ast_sip_session_get_name(session),
pjsip_tsx_state_str(tsx->state));
check_delayed_requests(session, invite_terminated);
}
} else if (tsx->role == PJSIP_ROLE_UAC
&& tsx->state == PJSIP_TSX_STATE_COMPLETED
&& !pj_strcmp2(&tsx->method.name, "UPDATE")) {
ast_debug(3, "%s: UPDATE delay check. tsx-state:%s\n",
ast_sip_session_get_name(session),
pjsip_tsx_state_str(tsx->state));
check_delayed_requests(session, update_completed);
}
SCOPE_EXIT_RTN();
}
static int add_sdp_streams(struct ast_sip_session_media *session_media,
struct ast_sip_session *session, pjmedia_sdp_session *answer,
const struct pjmedia_sdp_session *remote,
struct ast_stream *stream)
{
struct ast_sip_session_sdp_handler *handler = session_media->handler;
RAII_VAR(struct sdp_handler_list *, handler_list, NULL, ao2_cleanup);
int res = 0;
SCOPE_ENTER(1, "%s Stream: %s\n", ast_sip_session_get_name(session),
ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
if (handler) {
/* if an already assigned handler reports a catastrophic error, fail */
res = handler->create_outgoing_sdp_stream(session, session_media, answer, remote, stream);
if (res < 0) {
SCOPE_EXIT_RTN_VALUE(-1, "Coudn't create sdp stream\n");
}
SCOPE_EXIT_RTN_VALUE(0, "Had handler\n");
}
handler_list = ao2_find(sdp_handlers, ast_codec_media_type2str(session_media->type), OBJ_KEY);
if (!handler_list) {
SCOPE_EXIT_RTN_VALUE(0, "No handlers\n");
}
/* no handler for this stream type and we have a list to search */
AST_LIST_TRAVERSE(&handler_list->list, handler, next) {
if (handler == session_media->handler) {
continue;
}
res = handler->create_outgoing_sdp_stream(session, session_media, answer, remote, stream);
if (res < 0) {
/* catastrophic error */
SCOPE_EXIT_RTN_VALUE(-1, "Coudn't create sdp stream\n");
}
if (res > 0) {
/* Handled by this handler. Move to the next stream */
session_media_set_handler(session_media, handler);
SCOPE_EXIT_RTN_VALUE(0, "Handled\n");
}
}
/* streams that weren't handled won't be included in generated outbound SDP */
SCOPE_EXIT_RTN_VALUE(0, "Not handled\n");
}
/*! \brief Bundle group building structure */
struct sip_session_media_bundle_group {
/*! \brief The media identifiers in this bundle group */
char *mids[PJMEDIA_MAX_SDP_MEDIA];
/*! \brief SDP attribute string */
struct ast_str *attr_string;
};
static int add_bundle_groups(struct ast_sip_session *session, pj_pool_t *pool, pjmedia_sdp_session *answer)
{
pj_str_t stmp;
pjmedia_sdp_attr *attr;
struct sip_session_media_bundle_group bundle_groups[PJMEDIA_MAX_SDP_MEDIA];
int index, mid_id;
struct sip_session_media_bundle_group *bundle_group;
if (session->endpoint->media.webrtc) {
attr = pjmedia_sdp_attr_create(pool, "msid-semantic", pj_cstr(&stmp, "WMS *"));
pjmedia_sdp_attr_add(&answer->attr_count, answer->attr, attr);
}
if (!session->endpoint->media.bundle) {
return 0;
}
memset(bundle_groups, 0, sizeof(bundle_groups));
/* Build the bundle group layout so we can then add it to the SDP */
for (index = 0; index < AST_VECTOR_SIZE(&session->pending_media_state->sessions); ++index) {
struct ast_sip_session_media *session_media = AST_VECTOR_GET(&session->pending_media_state->sessions, index);
/* If this stream is not part of a bundle group we can't add it */
if (session_media->bundle_group == -1) {
continue;
}
bundle_group = &bundle_groups[session_media->bundle_group];
/* If this is the first mid then we need to allocate the attribute string and place BUNDLE in front */
if (!bundle_group->mids[0]) {
bundle_group->mids[0] = session_media->mid;
bundle_group->attr_string = ast_str_create(64);
if (!bundle_group->attr_string) {
continue;
}
ast_str_set(&bundle_group->attr_string, 0, "BUNDLE %s", session_media->mid);
continue;
}
for (mid_id = 1; mid_id < PJMEDIA_MAX_SDP_MEDIA; ++mid_id) {
if (!bundle_group->mids[mid_id]) {
bundle_group->mids[mid_id] = session_media->mid;
ast_str_append(&bundle_group->attr_string, 0, " %s", session_media->mid);
break;
} else if (!strcmp(bundle_group->mids[mid_id], session_media->mid)) {
break;
}
}
}
/* Add all bundle groups that have mids to the SDP */
for (index = 0; index < PJMEDIA_MAX_SDP_MEDIA; ++index) {
bundle_group = &bundle_groups[index];
if (!bundle_group->attr_string) {
continue;
}
attr = pjmedia_sdp_attr_create(pool, "group", pj_cstr(&stmp, ast_str_buffer(bundle_group->attr_string)));
pjmedia_sdp_attr_add(&answer->attr_count, answer->attr, attr);
ast_free(bundle_group->attr_string);
}
return 0;
}
static struct pjmedia_sdp_session *create_local_sdp(pjsip_inv_session *inv, struct ast_sip_session *session, const pjmedia_sdp_session *offer, const unsigned int ignore_active_stream_topology)
{
static const pj_str_t STR_IN = { "IN", 2 };
static const pj_str_t STR_IP4 = { "IP4", 3 };
static const pj_str_t STR_IP6 = { "IP6", 3 };
pjmedia_sdp_session *local;
int i;
int stream;
SCOPE_ENTER(3, "%s\n", ast_sip_session_get_name(session));
if (inv->state == PJSIP_INV_STATE_DISCONNECTED) {
SCOPE_EXIT_LOG_RTN_VALUE(NULL, LOG_ERROR, "%s: Failed to create session SDP. Session has been already disconnected\n",
ast_sip_session_get_name(session));
}
if (!inv->pool_prov || !(local = PJ_POOL_ZALLOC_T(inv->pool_prov, pjmedia_sdp_session))) {
SCOPE_EXIT_LOG_RTN_VALUE(NULL, LOG_ERROR, "%s: Pool allocation failure\n", ast_sip_session_get_name(session));
}
if (!offer) {
local->origin.version = local->origin.id = (pj_uint32_t)(ast_random());
} else {
local->origin.version = offer->origin.version + 1;
local->origin.id = offer->origin.id;
}
pj_strdup2(inv->pool_prov, &local->origin.user, session->endpoint->media.sdpowner);
pj_strdup2(inv->pool_prov, &local->name, session->endpoint->media.sdpsession);
if (!session->pending_media_state->topology || !ast_stream_topology_get_count(session->pending_media_state->topology)) {
/* We've encountered a situation where we have been told to create a local SDP but noone has given us any indication
* of what kind of stream topology they would like. We try to not alter the current state of the SDP negotiation
* by using what is currently negotiated. If this is unavailable we fall back to what is configured on the endpoint.
* We will also do this if wanted by the ignore_active_stream_topology flag.
*/
ast_trace(-1, "no information about stream topology received\n");
ast_stream_topology_free(session->pending_media_state->topology);
if (session->active_media_state->topology && !ignore_active_stream_topology) {
ast_trace(-1, "using existing topology\n");
session->pending_media_state->topology = ast_stream_topology_clone(session->active_media_state->topology);
} else {
if (ignore_active_stream_topology) {
ast_trace(-1, "fall back to endpoint configuration - ignore active stream topolog\n");
} else {
ast_trace(-1, "fall back to endpoint configuration\n");
}
session->pending_media_state->topology = ast_stream_topology_clone(session->endpoint->media.topology);
}
if (!session->pending_media_state->topology) {
SCOPE_EXIT_LOG_RTN_VALUE(NULL, LOG_ERROR, "%s: No pending media state topology\n", ast_sip_session_get_name(session));
}
}
ast_trace(-1, "%s: Processing streams\n", ast_sip_session_get_name(session));
for (i = 0; i < ast_stream_topology_get_count(session->pending_media_state->topology); ++i) {
struct ast_sip_session_media *session_media;
struct ast_stream *stream = ast_stream_topology_get_stream(session->pending_media_state->topology, i);
unsigned int streams = local->media_count;
SCOPE_ENTER(4, "%s: Processing stream %s\n", ast_sip_session_get_name(session),
ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
/* This code does not enforce any maximum stream count limitations as that is done on either
* the handling of an incoming SDP offer or on the handling of a session refresh.
*/
session_media = ast_sip_session_media_state_add(session, session->pending_media_state, ast_stream_get_type(stream), i);
if (!session_media) {
local = NULL;
SCOPE_EXIT_LOG_EXPR(goto end, LOG_ERROR, "%s: Couldn't alloc/add session media for stream %s\n",
ast_sip_session_get_name(session), ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
}
if (add_sdp_streams(session_media, session, local, offer, stream)) {
local = NULL;
SCOPE_EXIT_LOG_EXPR(goto end, LOG_ERROR, "%s: Couldn't add sdp streams for stream %s\n",
ast_sip_session_get_name(session), ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
}
/* If a stream was actually added then add any additional details */
if (streams != local->media_count) {
pjmedia_sdp_media *media = local->media[streams];
pj_str_t stmp;
pjmedia_sdp_attr *attr;
/* Add the media identifier if present */
if (!ast_strlen_zero(session_media->mid)) {
attr = pjmedia_sdp_attr_create(inv->pool_prov, "mid", pj_cstr(&stmp, session_media->mid));
pjmedia_sdp_attr_add(&media->attr_count, media->attr, attr);
}
ast_trace(-1, "%s: Stream %s added%s%s\n", ast_sip_session_get_name(session),
ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)),
S_COR(!ast_strlen_zero(session_media->mid), " with mid ", ""), S_OR(session_media->mid, ""));
}
/* Ensure that we never exceed the maximum number of streams PJMEDIA will allow. */
if (local->media_count == PJMEDIA_MAX_SDP_MEDIA) {
SCOPE_EXIT_EXPR(break, "%s: Stream %s exceeded max pjmedia count of %d\n",
ast_sip_session_get_name(session), ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)),
PJMEDIA_MAX_SDP_MEDIA);
}
SCOPE_EXIT("%s: Done with %s\n", ast_sip_session_get_name(session),
ast_str_tmp(128, ast_stream_to_str(stream, &STR_TMP)));
}
/* Add any bundle groups that are present on the media state */
ast_trace(-1, "%s: Adding bundle groups (if available)\n", ast_sip_session_get_name(session));
if (add_bundle_groups(session, inv->pool_prov, local)) {
SCOPE_EXIT_LOG_RTN_VALUE(NULL, LOG_ERROR, "%s: Couldn't add bundle groups\n", ast_sip_session_get_name(session));
}
/* Use the connection details of an available media if possible for SDP level */
ast_trace(-1, "%s: Copying connection details\n", ast_sip_session_get_name(session));
for (stream = 0; stream < local->media_count; stream++) {
SCOPE_ENTER(4, "%s: Processing media %d\n", ast_sip_session_get_name(session), stream);
if (!local->media[stream]->conn) {
SCOPE_EXIT_EXPR(continue, "%s: Media %d has no connection info\n", ast_sip_session_get_name(session), stream);
}
if (local->conn) {
if (!pj_strcmp(&local->conn->net_type, &local->media[stream]->conn->net_type) &&
!pj_strcmp(&local->conn->addr_type, &local->media[stream]->conn->addr_type) &&
!pj_strcmp(&local->conn->addr, &local->media[stream]->conn->addr)) {
local->media[stream]->conn = NULL;
}
SCOPE_EXIT_EXPR(continue, "%s: Media %d has good existing connection info\n", ast_sip_session_get_name(session), stream);
}
/* This stream's connection info will serve as the connection details for SDP level */
local->conn = local->media[stream]->conn;
local->media[stream]->conn = NULL;
SCOPE_EXIT_EXPR(continue, "%s: Media %d reset\n", ast_sip_session_get_name(session), stream);
}
/* If no SDP level connection details are present then create some */
if (!local->conn) {
ast_trace(-1, "%s: Creating connection details\n", ast_sip_session_get_name(session));
local->conn = pj_pool_zalloc(inv->pool_prov, sizeof(struct pjmedia_sdp_conn));
local->conn->net_type = STR_IN;
local->conn->addr_type = session->endpoint->media.rtp.ipv6 ? STR_IP6 : STR_IP4;
if (!ast_strlen_zero(session->endpoint->media.address)) {
pj_strdup2(inv->pool_prov, &local->conn->addr, session->endpoint->media.address);
} else {
pj_strdup2(inv->pool_prov, &local->conn->addr, ast_sip_get_host_ip_string(session->endpoint->media.rtp.ipv6 ? pj_AF_INET6() : pj_AF_INET()));
}
}
pj_strassign(&local->origin.net_type, &local->conn->net_type);
pj_strassign(&local->origin.addr_type, &local->conn->addr_type);
pj_strassign(&local->origin.addr, &local->conn->addr);
end:
SCOPE_EXIT_RTN_VALUE(local, "%s\n", ast_sip_session_get_name(session));
}
static void session_inv_on_rx_offer(pjsip_inv_session *inv, const pjmedia_sdp_session *offer)
{
struct ast_sip_session *session = inv->mod_data[session_module.id];
pjmedia_sdp_session *answer;
SCOPE_ENTER(3, "%s\n", ast_sip_session_get_name(session));
if (ast_shutdown_final()) {
SCOPE_EXIT_RTN("%s: Shutdown in progress\n", ast_sip_session_get_name(session));
}
session = inv->mod_data[session_module.id];
if (handle_incoming_sdp(session, offer)) {
ast_sip_session_media_state_reset(session->pending_media_state);
SCOPE_EXIT_RTN("%s: handle_incoming_sdp failed\n", ast_sip_session_get_name(session));
}
if ((answer = create_local_sdp(inv, session, offer, 0))) {
pjsip_inv_set_sdp_answer(inv, answer);
SCOPE_EXIT_RTN("%s: Set SDP answer\n", ast_sip_session_get_name(session));
}
SCOPE_EXIT_RTN("%s: create_local_sdp failed\n", ast_sip_session_get_name(session));
}
static void session_inv_on_create_offer(pjsip_inv_session *inv, pjmedia_sdp_session **p_offer)
{
struct ast_sip_session *session = inv->mod_data[session_module.id];
const pjmedia_sdp_session *previous_sdp = NULL;
pjmedia_sdp_session *offer;
int i;
unsigned int ignore_active_stream_topology = 0;
/* We allow PJSIP to produce an SDP if no channel is present. This may result
* in an incorrect SDP occurring, but if no channel is present then we are in
* the midst of a BYE and are hanging up. This ensures that all the code to
* produce an SDP doesn't need to worry about a channel being present or not,
* just in case.
*/
SCOPE_ENTER(3, "%s\n", ast_sip_session_get_name(session));
if (!session->channel) {
SCOPE_EXIT_RTN("%s: No channel\n", ast_sip_session_get_name(session));
}
/* Some devices send a re-INVITE offer with empty SDP. Asterisk by default return
* an answer with the current used codecs, which is not strictly compliant to RFC
* 3261 (SHOULD requirement). So we detect this condition and include all
* configured codecs in the answer if the workaround is activated. The actual
* logic is in the create_local_sdp function. We can't detect here that we have
* no SDP body in the INVITE, as we don't have access to the message.
*/
if (inv->invite_tsx && inv->state == PJSIP_INV_STATE_CONFIRMED
&& inv->invite_tsx->method.id == PJSIP_INVITE_METHOD) {
ast_trace(-1, "re-INVITE\n");
if (inv->invite_tsx->role == PJSIP_ROLE_UAS
&& ast_sip_get_all_codecs_on_empty_reinvite()) {
ast_trace(-1, "UAS role, include all codecs in the answer on empty SDP\n");
ignore_active_stream_topology = 1;
}
}
if (inv->neg) {
if (pjmedia_sdp_neg_was_answer_remote(inv->neg)) {
pjmedia_sdp_neg_get_active_remote(inv->neg, &previous_sdp);
} else {
pjmedia_sdp_neg_get_active_local(inv->neg, &previous_sdp);
}
}
if (ignore_active_stream_topology) {
offer = create_local_sdp(inv, session, NULL, 1);
} else {
offer = create_local_sdp(inv, session, previous_sdp, 0);
}
if (!offer) {
SCOPE_EXIT_RTN("%s: create offer failed\n", ast_sip_session_get_name(session));
}
ast_queue_unhold(session->channel);
/*
* Some devices indicate hold with deferred SDP reinvites (i.e. no SDP in the reinvite).
* When hold is initially indicated, we
* - Receive an INVITE with no SDP
* - Send a 200 OK with SDP, indicating sendrecv in the media streams
* - Receive an ACK with SDP, indicating sendonly in the media streams
*
* At this point, the pjmedia negotiator saves the state of the media direction so that
* if we are to send any offers, we'll offer recvonly in the media streams. This is
* problematic if the device is attempting to unhold, though. If the device unholds
* by sending a reinvite with no SDP, then we will respond with a 200 OK with recvonly.
* According to RFC 3264, if an offerer offers recvonly, then the answerer MUST respond
* with sendonly or inactive. The result of this is that the stream is not off hold.
*
* Therefore, in this case, when we receive a reinvite while the stream is on hold, we
* need to be sure to offer sendrecv. This way, the answerer can respond with sendrecv
* in order to get the stream off hold. If this is actually a different purpose reinvite
* (like a session timer refresh), then the answerer can respond to our sendrecv with
* sendonly, keeping the stream on hold.
*/
for (i = 0; i < offer->media_count; ++i) {
pjmedia_sdp_media *m = offer->media[i];
pjmedia_sdp_attr *recvonly;
pjmedia_sdp_attr *inactive;
pjmedia_sdp_attr *sendonly;
recvonly = pjmedia_sdp_attr_find2(m->attr_count, m->attr, "recvonly", NULL);
inactive = pjmedia_sdp_attr_find2(m->attr_count, m->attr, "inactive", NULL);
sendonly = pjmedia_sdp_attr_find2(m->attr_count, m->attr, "sendonly", NULL);
if (recvonly || inactive || sendonly) {
pjmedia_sdp_attr *to_remove = recvonly ?: inactive ?: sendonly;
pjmedia_sdp_attr *sendrecv;
pjmedia_sdp_attr_remove(&m->attr_count, m->attr, to_remove);
sendrecv = pjmedia_sdp_attr_create(session->inv_session->pool, "sendrecv", NULL);
pjmedia_sdp_media_add_attr(m, sendrecv);
}
}
*p_offer = offer;
SCOPE_EXIT_RTN("%s: offer created\n", ast_sip_session_get_name(session));
}
static void session_inv_on_media_update(pjsip_inv_session *inv, pj_status_t status)
{
struct ast_sip_session *session = inv->mod_data[session_module.id];
const pjmedia_sdp_session *local, *remote;
SCOPE_ENTER(3, "%s\n", ast_sip_session_get_name(session));
if (ast_shutdown_final()) {
SCOPE_EXIT_RTN("%s: Shutdown in progress\n", ast_sip_session_get_name(session));
}
session = inv->mod_data[session_module.id];
if (!session || !session->channel) {
/*
* If we don't have a session or channel then we really
* don't care about media updates.
* Just ignore
*/
SCOPE_EXIT_RTN("%s: No channel or session\n", ast_sip_session_get_name(session));
}
if (session->endpoint) {
int bail = 0;
/*
* If following_fork is set, then this is probably the result of a
* forked INVITE and SDP asnwers coming from the different fork UAS
* destinations. In this case updated_sdp_answer will also be set.
*
* If only updated_sdp_answer is set, then this is the non-forking
* scenario where the same UAS just needs to change something like
* the media port.
*/
if (inv->following_fork) {
if (session->endpoint->media.rtp.follow_early_media_fork) {
ast_trace(-1, "%s: Following early media fork with different To tags\n", ast_sip_session_get_name(session));
} else {
ast_trace(-1, "%s: Not following early media fork with different To tags\n", ast_sip_session_get_name(session));
bail = 1;
}
}
#ifdef HAVE_PJSIP_INV_ACCEPT_MULTIPLE_SDP_ANSWERS
else if (inv->updated_sdp_answer) {
if (session->endpoint->media.rtp.accept_multiple_sdp_answers) {
ast_trace(-1, "%s: Accepting updated SDP with same To tag\n", ast_sip_session_get_name(session));
} else {
ast_trace(-1, "%s: Ignoring updated SDP answer with same To tag\n", ast_sip_session_get_name(session));
bail = 1;
}
}
#endif
if (bail) {
SCOPE_EXIT_RTN("%s: Bailing\n", ast_sip_session_get_name(session));
}
}
if ((status != PJ_SUCCESS) || (pjmedia_sdp_neg_get_active_local(inv->neg, &local) != PJ_SUCCESS) ||
(pjmedia_sdp_neg_get_active_remote(inv->neg, &remote) != PJ_SUCCESS)) {
ast_channel_hangupcause_set(session->channel, AST_CAUSE_BEARERCAPABILITY_NOTAVAIL);
ast_set_hangupsource(session->channel, ast_channel_name(session->channel), 0);
ast_queue_hangup(session->channel);
SCOPE_EXIT_RTN("%s: Couldn't get active or local or remote negotiator. Hanging up\n", ast_sip_session_get_name(session));
}
if (handle_negotiated_sdp(session, local, remote)) {
ast_sip_session_media_state_reset(session->pending_media_state);
SCOPE_EXIT_RTN("%s: handle_negotiated_sdp failed. Resetting pending media state\n", ast_sip_session_get_name(session));
}
SCOPE_EXIT_RTN("%s\n", ast_sip_session_get_name(session));
}
static pjsip_redirect_op session_inv_on_redirected(pjsip_inv_session *inv, const pjsip_uri *target, const pjsip_event *e)
{
struct ast_sip_session *session;
const pjsip_sip_uri *uri;
if (ast_shutdown_final()) {
return PJSIP_REDIRECT_STOP;
}
session = inv->mod_data[session_module.id];
if (!session || !session->channel) {
return PJSIP_REDIRECT_STOP;
}
if (session->endpoint->redirect_method == AST_SIP_REDIRECT_URI_PJSIP) {
return PJSIP_REDIRECT_ACCEPT;
}
if (!PJSIP_URI_SCHEME_IS_SIP(target) && !PJSIP_URI_SCHEME_IS_SIPS(target)) {
return PJSIP_REDIRECT_STOP;
}
handle_incoming(session, e->body.rx_msg.rdata, AST_SIP_SESSION_BEFORE_REDIRECTING);
uri = pjsip_uri_get_uri(target);
if (session->endpoint->redirect_method == AST_SIP_REDIRECT_USER) {
char exten[AST_MAX_EXTENSION];
ast_copy_pj_str(exten, &uri->user, sizeof(exten));
/*
* We may want to match in the dialplan without any user
* options getting in the way.
*/
AST_SIP_USER_OPTIONS_TRUNCATE_CHECK(exten);
ast_channel_call_forward_set(session->channel, exten);
} else if (session->endpoint->redirect_method == AST_SIP_REDIRECT_URI_CORE) {
char target_uri[PJSIP_MAX_URL_SIZE];
/* PJSIP/ + endpoint length + / + max URL size */
char forward[8 + strlen(ast_sorcery_object_get_id(session->endpoint)) + PJSIP_MAX_URL_SIZE];
pjsip_uri_print(PJSIP_URI_IN_REQ_URI, uri, target_uri, sizeof(target_uri));
sprintf(forward, "PJSIP/%s/%s", ast_sorcery_object_get_id(session->endpoint), target_uri);
ast_channel_call_forward_set(session->channel, forward);
}
return PJSIP_REDIRECT_STOP;
}
static pjsip_inv_callback inv_callback = {
.on_state_changed = session_inv_on_state_changed,
.on_new_session = session_inv_on_new_session,
.on_tsx_state_changed = session_inv_on_tsx_state_changed,
.on_rx_offer = session_inv_on_rx_offer,
.on_create_offer = session_inv_on_create_offer,
.on_media_update = session_inv_on_media_update,
.on_redirected = session_inv_on_redirected,
};
/*! \brief Hook for modifying outgoing messages with SDP to contain the proper address information */
static void session_outgoing_nat_hook(pjsip_tx_data *tdata, struct ast_sip_transport *transport)
{
RAII_VAR(struct ast_sip_transport_state *, transport_state, ast_sip_get_transport_state(ast_sorcery_object_get_id(transport)), ao2_cleanup);
struct ast_sip_nat_hook *hook = ast_sip_mod_data_get(
tdata->mod_data, session_module.id, MOD_DATA_NAT_HOOK);
pjsip_sdp_info *sdp_info;
pjmedia_sdp_session *sdp;
pjsip_dialog *dlg = pjsip_tdata_get_dlg(tdata);
RAII_VAR(struct ast_sip_session *, session, dlg ? ast_sip_dialog_get_session(dlg) : NULL, ao2_cleanup);
int stream;
/*
* If there's no transport_state or body, or the hook
* has already been run, just return.
*/
if (ast_strlen_zero(transport->external_media_address) || !transport_state || hook || !tdata->msg->body) {
return;
}
sdp_info = pjsip_get_sdp_info(tdata->pool, tdata->msg->body, NULL, &pjsip_media_type_application_sdp);
if (sdp_info->sdp_err != PJ_SUCCESS || !sdp_info->sdp) {
return;
}
sdp = sdp_info->sdp;
if (sdp->conn) {
char host[NI_MAXHOST];
struct ast_sockaddr our_sdp_addr = { { 0, } };
ast_copy_pj_str(host, &sdp->conn->addr, sizeof(host));
ast_sockaddr_parse(&our_sdp_addr, host, PARSE_PORT_FORBID);
/* Reversed check here. We don't check the remote
* endpoint being in our local net, but whether our
* outgoing session IP is local. If it is, we'll do
* rewriting. No localnet configured? Always rewrite. */
if (ast_sip_transport_is_local(transport_state, &our_sdp_addr) || !transport_state->localnet) {
ast_debug(5, "%s: Setting external media address to %s\n", ast_sip_session_get_name(session),
ast_sockaddr_stringify_addr_remote(&transport_state->external_media_address));
pj_strdup2(tdata->pool, &sdp->conn->addr, ast_sockaddr_stringify_addr_remote(&transport_state->external_media_address));
pj_strassign(&sdp->origin.addr, &sdp->conn->addr);
}
}
for (stream = 0; stream < sdp->media_count; ++stream) {
/* See if there are registered handlers for this media stream type */
char media[20];
struct ast_sip_session_sdp_handler *handler;
RAII_VAR(struct sdp_handler_list *, handler_list, NULL, ao2_cleanup);
/* We need a null-terminated version of the media string */
ast_copy_pj_str(media, &sdp->media[stream]->desc.media, sizeof(media));
handler_list = ao2_find(sdp_handlers, media, OBJ_KEY);
if (!handler_list) {
ast_debug(4, "%s: No registered SDP handlers for media type '%s'\n", ast_sip_session_get_name(session),
media);
continue;
}
AST_LIST_TRAVERSE(&handler_list->list, handler, next) {
if (handler->change_outgoing_sdp_stream_media_address) {
handler->change_outgoing_sdp_stream_media_address(tdata, sdp->media[stream], transport);
}
}
}
/* We purposely do this so that the hook will not be invoked multiple times, ie: if a retransmit occurs */
ast_sip_mod_data_set(tdata->pool, tdata->mod_data, session_module.id, MOD_DATA_NAT_HOOK, nat_hook);
}
#ifdef TEST_FRAMEWORK
static struct ast_stream *test_stream_alloc(const char *name, enum ast_media_type type, enum ast_stream_state state)
{
struct ast_stream *stream;
stream = ast_stream_alloc(name, type);
if (!stream) {
return NULL;
}
ast_stream_set_state(stream, state);
return stream;
}
static struct ast_sip_session_media *test_media_add(
struct ast_sip_session_media_state *media_state, const char *name, enum ast_media_type type,
enum ast_stream_state state, int position)
{
struct ast_sip_session_media *session_media = NULL;
struct ast_stream *stream = NULL;
stream = test_stream_alloc(name, type, state);
if (!stream) {
return NULL;
}
if (position >= 0 && position < ast_stream_topology_get_count(media_state->topology)) {
ast_stream_topology_set_stream(media_state->topology, position, stream);
} else {
position = ast_stream_topology_append_stream(media_state->topology, stream);
}
session_media = ao2_alloc_options(sizeof(*session_media), session_media_dtor, AO2_ALLOC_OPT_LOCK_NOLOCK);
if (!session_media) {
return NULL;
}
session_media->keepalive_sched_id = -1;
session_media->timeout_sched_id = -1;
session_media->type = type;
session_media->stream_num = position;
session_media->bundle_group = -1;
strcpy(session_media->label, name);
if (AST_VECTOR_REPLACE(&media_state->sessions, position, session_media)) {
ao2_ref(session_media, -1);
return NULL;
}
/* If this stream will be active in some way and it is the first of this type then consider this the default media session to match */
if (!media_state->default_session[type] && ast_stream_get_state(ast_stream_topology_get_stream(media_state->topology, position)) != AST_STREAM_STATE_REMOVED) {
media_state->default_session[type] = session_media;
}
return session_media;
}
static int test_is_media_session_equal(struct ast_sip_session_media *left, struct ast_sip_session_media *right)
{
if (left == right) {
return 1;
}
if (!left) {
return 1;
}
if (!right) {
return 0;
}
return memcmp(left, right, sizeof(*left)) == 0;
}
static int test_is_media_state_equal(struct ast_sip_session_media_state *left, struct ast_sip_session_media_state *right,
int assert_on_failure)
{
int i;
SCOPE_ENTER(2);
if (left == right) {
SCOPE_EXIT_RTN_VALUE(1, "equal\n");
}
if (!(left && right)) {
ast_assert(!assert_on_failure);
SCOPE_EXIT_RTN_VALUE(0, "one is null: left: %p right: %p\n", left, right);
}
if (!ast_stream_topology_equal(left->topology, right->topology)) {
ast_assert(!assert_on_failure);
SCOPE_EXIT_RTN_VALUE(0, "topologies differ\n");
}
if (AST_VECTOR_SIZE(&left->sessions) != AST_VECTOR_SIZE(&right->sessions)) {
ast_assert(!assert_on_failure);
SCOPE_EXIT_RTN_VALUE(0, "session vector sizes different: left %zu != right %zu\n",
AST_VECTOR_SIZE(&left->sessions),
AST_VECTOR_SIZE(&right->sessions));
}
if (AST_VECTOR_SIZE(&left->read_callbacks) != AST_VECTOR_SIZE(&right->read_callbacks)) {
ast_assert(!assert_on_failure);
SCOPE_EXIT_RTN_VALUE(0, "read_callback vector sizes different: left %zu != right %zu\n",
AST_VECTOR_SIZE(&left->read_callbacks),
AST_VECTOR_SIZE(&right->read_callbacks));
}
for (i = 0; i < AST_VECTOR_SIZE(&left->sessions) ; i++) {
if (!test_is_media_session_equal(AST_VECTOR_GET(&left->sessions, i), AST_VECTOR_GET(&right->sessions, i))) {
ast_assert(!assert_on_failure);
SCOPE_EXIT_RTN_VALUE(0, "Media session %d different\n", i);
}
}
for (i = 0; i < AST_VECTOR_SIZE(&left->read_callbacks) ; i++) {
if (memcmp(AST_VECTOR_GET_ADDR(&left->read_callbacks, i),
AST_VECTOR_GET_ADDR(&right->read_callbacks, i),
sizeof(struct ast_sip_session_media_read_callback_state)) != 0) {
ast_assert(!assert_on_failure);
SCOPE_EXIT_RTN_VALUE(0, "read_callback %d different\n", i);
}
}
for (i = 0; i < AST_MEDIA_TYPE_END; i++) {
if (!(left->default_session[i] && right->default_session[i])) {
continue;
}
if (!left->default_session[i] || !right->default_session[i]
|| left->default_session[i]->stream_num != right->default_session[i]->stream_num) {
ast_assert(!assert_on_failure);
SCOPE_EXIT_RTN_VALUE(0, "Default media session %d different. Left: %s Right: %s\n", i,
left->default_session[i] ? left->default_session[i]->label : "null",
right->default_session[i] ? right->default_session[i]->label : "null");
}
}
SCOPE_EXIT_RTN_VALUE(1, "equal\n");
}
AST_TEST_DEFINE(test_resolve_refresh_media_states)
{
#define FREE_STATE() \
({ \
ast_sip_session_media_state_free(new_pending_state); \
new_pending_state = NULL; \
ast_sip_session_media_state_free(delayed_pending_state); \
delayed_pending_state = NULL; \
ast_sip_session_media_state_free(delayed_active_state); \
delayed_active_state = NULL; \
ast_sip_session_media_state_free(current_active_state); \
current_active_state = NULL; \
ast_sip_session_media_state_free(expected_pending_state); \
expected_pending_state = NULL; \
})
#define RESET_STATE(__num) \
({ \
testnum=__num; \
ast_trace(-1, "Test %d\n", testnum); \
test_failed = 0; \
delayed_pending_state = ast_sip_session_media_state_alloc(); \
delayed_pending_state->topology = ast_stream_topology_alloc(); \
delayed_active_state = ast_sip_session_media_state_alloc(); \
delayed_active_state->topology = ast_stream_topology_alloc(); \
current_active_state = ast_sip_session_media_state_alloc(); \
current_active_state->topology = ast_stream_topology_alloc(); \
expected_pending_state = ast_sip_session_media_state_alloc(); \
expected_pending_state->topology = ast_stream_topology_alloc(); \
})
#define CHECKER() \
({ \
new_pending_state = resolve_refresh_media_states("unittest", delayed_pending_state, delayed_active_state, current_active_state, 1); \
if (!test_is_media_state_equal(new_pending_state, expected_pending_state, 0)) { \
res = AST_TEST_FAIL; \
test_failed = 1; \
ast_test_status_update(test, "da: %s\n", ast_str_tmp(256, ast_stream_topology_to_str(delayed_active_state->topology, &STR_TMP))); \
ast_test_status_update(test, "dp: %s\n", ast_str_tmp(256, ast_stream_topology_to_str(delayed_pending_state->topology, &STR_TMP))); \
ast_test_status_update(test, "ca: %s\n", ast_str_tmp(256, ast_stream_topology_to_str(current_active_state->topology, &STR_TMP))); \
ast_test_status_update(test, "ep: %s\n", ast_str_tmp(256, ast_stream_topology_to_str(expected_pending_state->topology, &STR_TMP))); \
ast_test_status_update(test, "np: %s\n", ast_str_tmp(256, ast_stream_topology_to_str(new_pending_state->topology, &STR_TMP))); \
} \
ast_test_status_update(test, "Test %d %s\n", testnum, test_failed ? "FAILED" : "passed"); \
ast_trace(-1, "Test %d %s\n", testnum, test_failed ? "FAILED" : "passed"); \
test_failed = 0; \
FREE_STATE(); \
})
struct ast_sip_session_media_state * delayed_pending_state = NULL;
struct ast_sip_session_media_state * delayed_active_state = NULL;
struct ast_sip_session_media_state * current_active_state = NULL;
struct ast_sip_session_media_state * new_pending_state = NULL;
struct ast_sip_session_media_state * expected_pending_state = NULL;
enum ast_test_result_state res = AST_TEST_PASS;
int test_failed = 0;
int testnum = 0;
SCOPE_ENTER(1);
switch (cmd) {
case TEST_INIT:
info->name = "merge_refresh_topologies";
info->category = "/res/res_pjsip_session/";
info->summary = "Test merging of delayed request topologies";
info->description = "Test merging of delayed request topologies";
SCOPE_EXIT_RTN_VALUE(AST_TEST_NOT_RUN);
case TEST_EXECUTE:
break;
}
RESET_STATE(1);
test_media_add(delayed_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
CHECKER();
RESET_STATE(2);
test_media_add(delayed_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
CHECKER();
RESET_STATE(3);
test_media_add(delayed_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo5", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo5", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
CHECKER();
RESET_STATE(4);
test_media_add(delayed_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_REMOVED, -1);
test_media_add(expected_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
CHECKER();
RESET_STATE(5);
test_media_add(delayed_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_REMOVED, -1);
test_media_add(current_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_REMOVED, -1);
test_media_add(expected_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_REMOVED, -1);
CHECKER();
RESET_STATE(6);
test_media_add(delayed_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_REMOVED, -1);
test_media_add(current_active_state, "myvideo4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
CHECKER();
RESET_STATE(7);
test_media_add(delayed_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo5", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo6", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo5", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo6", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
CHECKER();
RESET_STATE(8);
test_media_add(delayed_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_REMOVED, -1);
test_media_add(expected_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
CHECKER();
RESET_STATE(9);
test_media_add(delayed_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_REMOVED, -1);
test_media_add(current_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_REMOVED, -1);
test_media_add(expected_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
CHECKER();
RESET_STATE(10);
test_media_add(delayed_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_REMOVED, -1);
test_media_add(delayed_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_REMOVED, -1);
test_media_add(current_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_REMOVED, -1);
test_media_add(expected_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_REMOVED, -1);
test_media_add(expected_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
CHECKER();
RESET_STATE(11);
test_media_add(delayed_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "myvideo4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "myvideo4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "myvideo3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
CHECKER();
RESET_STATE(12);
test_media_add(delayed_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "292-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "296-2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "292-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "296-2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "297-4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "294-5", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "292-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "296-2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "290-3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "297-4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "292-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "296-2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "290-3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "297-4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "294-5", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
CHECKER();
RESET_STATE(13);
test_media_add(delayed_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "293-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "292-2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "294-3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "295-4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "296-5", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "293-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "292-2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "294-3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "295-4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "296-5", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "298-7", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "293-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "292-2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "294-3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "295-4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "296-5", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "290-6", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "293-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "292-2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "294-3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "295-4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "296-5", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "290-6", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "298-7", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
CHECKER();
RESET_STATE(14);
test_media_add(delayed_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "298-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "297-2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "298-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "294-4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "295-5", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "298-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "297-2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "291-3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "294-4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "298-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "297-2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "291-3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "294-4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "295-5", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
CHECKER();
RESET_STATE(15);
test_media_add(delayed_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "298-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_active_state, "297-2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "298-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDONLY, -1);
test_media_add(delayed_pending_state, "294-4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(delayed_pending_state, "295-5", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "297-2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "291-3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "294-4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(current_active_state, "298-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "audio", AST_MEDIA_TYPE_AUDIO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "297-2", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "291-3", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "294-4", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
test_media_add(expected_pending_state, "298-1", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDONLY, -1);
test_media_add(expected_pending_state, "295-5", AST_MEDIA_TYPE_VIDEO, AST_STREAM_STATE_SENDRECV, -1);
CHECKER();
SCOPE_EXIT_RTN_VALUE(res);
}
#endif /* TEST_FRAMEWORK */
static int load_module(void)
{
pjsip_endpoint *endpt;
if (!ast_sip_get_sorcery() || !ast_sip_get_pjsip_endpoint()) {
return AST_MODULE_LOAD_DECLINE;
}
if (!(nat_hook = ast_sorcery_alloc(ast_sip_get_sorcery(), "nat_hook", NULL))) {
return AST_MODULE_LOAD_DECLINE;
}
nat_hook->outgoing_external_message = session_outgoing_nat_hook;
ast_sorcery_create(ast_sip_get_sorcery(), nat_hook);
sdp_handlers = ao2_container_alloc_hash(AO2_ALLOC_OPT_LOCK_MUTEX, 0,
SDP_HANDLER_BUCKETS, sdp_handler_list_hash, NULL, sdp_handler_list_cmp);
if (!sdp_handlers) {
return AST_MODULE_LOAD_DECLINE;
}
endpt = ast_sip_get_pjsip_endpoint();
pjsip_inv_usage_init(endpt, &inv_callback);
pjsip_100rel_init_module(endpt);
pjsip_timer_init_module(endpt);
if (ast_sip_register_service(&session_module)) {
return AST_MODULE_LOAD_DECLINE;
}
ast_sip_register_service(&session_reinvite_module);
ast_sip_register_service(&outbound_invite_auth_module);
pjsip_reason_header_load();
ast_module_shutdown_ref(ast_module_info->self);
#ifdef TEST_FRAMEWORK
AST_TEST_REGISTER(test_resolve_refresh_media_states);
#endif
return AST_MODULE_LOAD_SUCCESS;
}
static int unload_module(void)
{
pjsip_reason_header_unload();
#ifdef TEST_FRAMEWORK
AST_TEST_UNREGISTER(test_resolve_refresh_media_states);
#endif
ast_sip_unregister_service(&outbound_invite_auth_module);
ast_sip_unregister_service(&session_reinvite_module);
ast_sip_unregister_service(&session_module);
ast_sorcery_delete(ast_sip_get_sorcery(), nat_hook);
ao2_cleanup(nat_hook);
ao2_cleanup(sdp_handlers);
return 0;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_GLOBAL_SYMBOLS | AST_MODFLAG_LOAD_ORDER, "PJSIP Session resource",
.support_level = AST_MODULE_SUPPORT_CORE,
.load = load_module,
.unload = unload_module,
.load_pri = AST_MODPRI_APP_DEPEND,
.requires = "res_pjsip",
);
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