/* * Asterisk -- An open source telephony toolkit. * * Copyright (C) 2013, Digium, Inc. * * Mark Michelson * * 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 pjproject res_pjsip core ***/ #include "asterisk.h" #include #include #include #include #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" #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); 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"; } } 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"); } 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 = ""; 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)); } 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); 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) { 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 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, }; /*! \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))) { 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)) : ""; #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) : "" , session->contact ? ast_sorcery_object_get_id(session->contact) : "" ); /* 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; } 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) { 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)); /* * 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); } if (!strcmp(session->exten, pickupexten) || ast_exists_extension(NULL, session->endpoint->context, session->exten, 1, 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, session->endpoint->context, session->exten, 1, 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; pj_status_t dlg_status = PJ_EUNKNOWN; 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. */ 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); if (pjsip_inv_initial_answer(invite->session->inv_session, invite->rdata, 100, NULL, NULL, &tdata) != PJ_SUCCESS) { pjsip_inv_terminate(invite->session->inv_session, 500, PJ_TRUE); goto end; } 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); } else { /* We are creating a local SDP which is an offer */ local = create_local_sdp(invite->session->inv_session, invite->session, NULL); } /* 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); static const pj_str_t identity_str = { "Identity", 8 }; const pj_str_t use_identity_header_str = { AST_STIR_SHAKEN_RESPONSE_STR_USE_IDENTITY_HEADER, strlen(AST_STIR_SHAKEN_RESPONSE_STR_USE_IDENTITY_HEADER) }; 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); if ((endpoint->stir_shaken & AST_SIP_STIR_SHAKEN_VERIFY) && !ast_sip_rdata_get_header_value(rdata, identity_str)) { pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, AST_STIR_SHAKEN_RESPONSE_CODE_USE_IDENTITY_HEADER, &use_identity_header_str, NULL, NULL); ast_debug(3, "No Identity header when we require one\n"); return; } 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 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->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) && ++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) { 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. */ ast_stream_topology_free(session->pending_media_state->topology); if (session->active_media_state->topology) { session->pending_media_state->topology = ast_stream_topology_clone(session->active_media_state->topology); } else { 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))) { 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; /* 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. */ if (!session->channel) { return; } 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); } } offer = create_local_sdp(inv, session, previous_sdp); if (!offer) { return; } 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; } 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_host(&transport_state->external_media_address)); pj_strdup2(tdata->pool, &sdp->conn->addr, ast_sockaddr_stringify_host(&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); 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) { #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", );