3270 lines
101 KiB
C
3270 lines
101 KiB
C
/*
|
|
* Asterisk -- An open source telephony toolkit.
|
|
*
|
|
* Copyright (C) 2013, Digium, Inc.
|
|
*
|
|
* Mark Michelson <mmichelson@digium.com>
|
|
*
|
|
* See http://www.asterisk.org for more information about
|
|
* the Asterisk project. Please do not directly contact
|
|
* any of the maintainers of this project for assistance;
|
|
* the project provides a web site, mailing lists and IRC
|
|
* channels for your use.
|
|
*
|
|
* This program is free software, distributed under the terms of
|
|
* the GNU General Public License Version 2. See the LICENSE file
|
|
* at the top of the source tree.
|
|
*/
|
|
|
|
/*** MODULEINFO
|
|
<depend>pjproject</depend>
|
|
<depend>res_pjsip</depend>
|
|
<support_level>core</support_level>
|
|
***/
|
|
|
|
#include "asterisk.h"
|
|
|
|
#include <pjsip.h>
|
|
#include <pjsip_ua.h>
|
|
#include <pjlib.h>
|
|
|
|
#include "asterisk/res_pjsip.h"
|
|
#include "asterisk/res_pjsip_session.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"
|
|
|
|
#define SDP_HANDLER_BUCKETS 11
|
|
|
|
#define MOD_DATA_ON_RESPONSE "on_response"
|
|
#define MOD_DATA_NAT_HOOK "nat_hook"
|
|
|
|
/* Some forward declarations */
|
|
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);
|
|
|
|
/*! \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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static int session_media_hash(const void *obj, int flags)
|
|
{
|
|
const struct ast_sip_session_media *session_media = obj;
|
|
const char *stream_type = flags & OBJ_KEY ? obj : session_media->stream_type;
|
|
|
|
return ast_str_hash(stream_type);
|
|
}
|
|
|
|
static int session_media_cmp(void *obj, void *arg, int flags)
|
|
{
|
|
struct ast_sip_session_media *session_media1 = obj;
|
|
struct ast_sip_session_media *session_media2 = arg;
|
|
const char *stream_type2 = flags & OBJ_KEY ? arg : session_media2->stream_type;
|
|
|
|
return strcmp(session_media1->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);
|
|
ast_module_ref(ast_module_info->self);
|
|
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);
|
|
ast_module_ref(ast_module_info->self);
|
|
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_module_unref(ast_module_info->self);
|
|
}
|
|
}
|
|
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);
|
|
}
|
|
|
|
/*!
|
|
* \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 handle_incoming_sdp(struct ast_sip_session *session, const pjmedia_sdp_session *sdp)
|
|
{
|
|
int i;
|
|
int handled = 0;
|
|
|
|
if (session->inv_session && session->inv_session->state == PJSIP_INV_STATE_DISCONNECTED) {
|
|
ast_log(LOG_ERROR, "Failed to handle incoming SDP. Session has been already disconnected\n");
|
|
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);
|
|
RAII_VAR(struct ast_sip_session_media *, session_media, NULL, ao2_cleanup);
|
|
int res;
|
|
|
|
/* We need a null-terminated version of the media string */
|
|
ast_copy_pj_str(media, &sdp->media[i]->desc.media, sizeof(media));
|
|
|
|
session_media = ao2_find(session->media, media, OBJ_KEY);
|
|
if (!session_media) {
|
|
/* if the session_media doesn't exist, there weren't
|
|
* any handlers at the time of its creation */
|
|
continue;
|
|
}
|
|
|
|
if (session_media->handler) {
|
|
handler = session_media->handler;
|
|
ast_debug(1, "Negotiating incoming SDP media stream '%s' using %s SDP handler\n",
|
|
session_media->stream_type,
|
|
session_media->handler->id);
|
|
res = handler->negotiate_incoming_sdp_stream(session, session_media, sdp,
|
|
sdp->media[i]);
|
|
if (res < 0) {
|
|
/* Catastrophic failure. Abort! */
|
|
return -1;
|
|
} else if (res > 0) {
|
|
ast_debug(1, "Media stream '%s' handled by %s\n",
|
|
session_media->stream_type,
|
|
session_media->handler->id);
|
|
/* Handled by this handler. Move to the next stream */
|
|
handled = 1;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
handler_list = ao2_find(sdp_handlers, media, OBJ_KEY);
|
|
if (!handler_list) {
|
|
ast_debug(1, "No registered SDP handlers for media type '%s'\n", media);
|
|
continue;
|
|
}
|
|
AST_LIST_TRAVERSE(&handler_list->list, handler, next) {
|
|
if (handler == session_media->handler) {
|
|
continue;
|
|
}
|
|
ast_debug(1, "Negotiating incoming SDP media stream '%s' using %s SDP handler\n",
|
|
session_media->stream_type,
|
|
handler->id);
|
|
res = handler->negotiate_incoming_sdp_stream(session, session_media, sdp,
|
|
sdp->media[i]);
|
|
if (res < 0) {
|
|
/* Catastrophic failure. Abort! */
|
|
return -1;
|
|
}
|
|
if (res > 0) {
|
|
ast_debug(1, "Media stream '%s' handled by %s\n",
|
|
session_media->stream_type,
|
|
handler->id);
|
|
/* Handled by this handler. Move to the next stream */
|
|
session_media_set_handler(session_media, handler);
|
|
handled = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!handled) {
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct handle_negotiated_sdp_cb {
|
|
struct ast_sip_session *session;
|
|
const pjmedia_sdp_session *local;
|
|
const pjmedia_sdp_session *remote;
|
|
};
|
|
|
|
static int handle_negotiated_sdp_session_media(void *obj, void *arg, int flags)
|
|
{
|
|
struct ast_sip_session_media *session_media = obj;
|
|
struct handle_negotiated_sdp_cb *callback_data = arg;
|
|
struct ast_sip_session *session = callback_data->session;
|
|
const pjmedia_sdp_session *local = callback_data->local;
|
|
const pjmedia_sdp_session *remote = callback_data->remote;
|
|
int i;
|
|
|
|
for (i = 0; i < local->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);
|
|
int res;
|
|
|
|
if (!remote->media[i]) {
|
|
continue;
|
|
}
|
|
|
|
/* We need a null-terminated version of the media string */
|
|
ast_copy_pj_str(media, &local->media[i]->desc.media, sizeof(media));
|
|
|
|
/* stream type doesn't match the one we're looking to fill */
|
|
if (strcasecmp(session_media->stream_type, media)) {
|
|
continue;
|
|
}
|
|
|
|
handler = session_media->handler;
|
|
if (handler) {
|
|
ast_debug(1, "Applying negotiated SDP media stream '%s' using %s SDP handler\n",
|
|
session_media->stream_type,
|
|
handler->id);
|
|
res = handler->apply_negotiated_sdp_stream(session, session_media, local,
|
|
local->media[i], remote, remote->media[i]);
|
|
if (res >= 0) {
|
|
ast_debug(1, "Applied negotiated SDP media stream '%s' using %s SDP handler\n",
|
|
session_media->stream_type,
|
|
handler->id);
|
|
return CMP_MATCH;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
handler_list = ao2_find(sdp_handlers, media, OBJ_KEY);
|
|
if (!handler_list) {
|
|
ast_debug(1, "No registered SDP handlers for media type '%s'\n", media);
|
|
continue;
|
|
}
|
|
AST_LIST_TRAVERSE(&handler_list->list, handler, next) {
|
|
if (handler == session_media->handler) {
|
|
continue;
|
|
}
|
|
ast_debug(1, "Applying negotiated SDP media stream '%s' using %s SDP handler\n",
|
|
session_media->stream_type,
|
|
handler->id);
|
|
res = handler->apply_negotiated_sdp_stream(session, session_media, local,
|
|
local->media[i], remote, remote->media[i]);
|
|
if (res < 0) {
|
|
/* Catastrophic failure. Abort! */
|
|
return 0;
|
|
}
|
|
if (res > 0) {
|
|
ast_debug(1, "Applied negotiated SDP media stream '%s' using %s SDP handler\n",
|
|
session_media->stream_type,
|
|
handler->id);
|
|
/* Handled by this handler. Move to the next stream */
|
|
session_media_set_handler(session_media, handler);
|
|
return CMP_MATCH;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (session_media->handler && session_media->handler->stream_stop) {
|
|
ast_debug(1, "Stopping SDP media stream '%s' as it is not currently negotiated\n",
|
|
session_media->stream_type);
|
|
session_media->handler->stream_stop(session_media);
|
|
}
|
|
|
|
return CMP_MATCH;
|
|
}
|
|
|
|
static int handle_negotiated_sdp(struct ast_sip_session *session, const pjmedia_sdp_session *local, const pjmedia_sdp_session *remote)
|
|
{
|
|
RAII_VAR(struct ao2_iterator *, successful, NULL, ao2_iterator_cleanup);
|
|
struct handle_negotiated_sdp_cb callback_data = {
|
|
.session = session,
|
|
.local = local,
|
|
.remote = remote,
|
|
};
|
|
|
|
successful = ao2_callback(session->media, OBJ_MULTIPLE, handle_negotiated_sdp_session_media, &callback_data);
|
|
if (successful && ao2_iterator_count(successful) == ao2_container_count(session->media)) {
|
|
/* Nothing experienced a catastrophic failure */
|
|
ast_queue_frame(session->channel, &ast_null_frame);
|
|
return 0;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
AST_RWLIST_HEAD_STATIC(session_supplements, ast_sip_session_supplement);
|
|
|
|
int ast_sip_session_register_supplement(struct ast_sip_session_supplement *supplement)
|
|
{
|
|
struct ast_sip_session_supplement *iter;
|
|
int inserted = 0;
|
|
SCOPED_LOCK(lock, &session_supplements, AST_RWLIST_WRLOCK, AST_RWLIST_UNLOCK);
|
|
|
|
if (!supplement->response_priority) {
|
|
supplement->response_priority = AST_SIP_SESSION_BEFORE_MEDIA;
|
|
}
|
|
|
|
AST_RWLIST_TRAVERSE_SAFE_BEGIN(&session_supplements, iter, next) {
|
|
if (iter->priority > supplement->priority) {
|
|
AST_RWLIST_INSERT_BEFORE_CURRENT(supplement, next);
|
|
inserted = 1;
|
|
break;
|
|
}
|
|
}
|
|
AST_RWLIST_TRAVERSE_SAFE_END;
|
|
|
|
if (!inserted) {
|
|
AST_RWLIST_INSERT_TAIL(&session_supplements, supplement, next);
|
|
}
|
|
ast_module_ref(ast_module_info->self);
|
|
return 0;
|
|
}
|
|
|
|
void ast_sip_session_unregister_supplement(struct ast_sip_session_supplement *supplement)
|
|
{
|
|
struct ast_sip_session_supplement *iter;
|
|
SCOPED_LOCK(lock, &session_supplements, AST_RWLIST_WRLOCK, AST_RWLIST_UNLOCK);
|
|
AST_RWLIST_TRAVERSE_SAFE_BEGIN(&session_supplements, iter, next) {
|
|
if (supplement == iter) {
|
|
AST_RWLIST_REMOVE_CURRENT(next);
|
|
ast_module_unref(ast_module_info->self);
|
|
break;
|
|
}
|
|
}
|
|
AST_RWLIST_TRAVERSE_SAFE_END;
|
|
}
|
|
|
|
static struct ast_sip_session_supplement *supplement_dup(const struct ast_sip_session_supplement *src)
|
|
{
|
|
struct ast_sip_session_supplement *dst = ast_calloc(1, sizeof(*dst));
|
|
if (!dst) {
|
|
return NULL;
|
|
}
|
|
/* Will need to revisit if shallow copy becomes an issue */
|
|
*dst = *src;
|
|
return dst;
|
|
}
|
|
|
|
#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 to a string.
|
|
* \since 13.3.0
|
|
*
|
|
* \param method Delayed method enum value to convert to a string.
|
|
*
|
|
* \return String value of delayed method.
|
|
*/
|
|
static const char *delayed_method2str(enum delayed_method method)
|
|
{
|
|
const char *str = "<unknown>";
|
|
|
|
switch (method) {
|
|
case DELAYED_METHOD_INVITE:
|
|
str = "INVITE";
|
|
break;
|
|
case DELAYED_METHOD_UPDATE:
|
|
str = "UPDATE";
|
|
break;
|
|
case DELAYED_METHOD_BYE:
|
|
str = "BYE";
|
|
break;
|
|
}
|
|
|
|
return str;
|
|
}
|
|
|
|
/*!
|
|
* \brief Structure used for sending delayed requests
|
|
*
|
|
* Requests are typically delayed because the current transaction
|
|
* state of an INVITE. Once the pending INVITE transaction terminates,
|
|
* the delayed request will be sent
|
|
*/
|
|
struct ast_sip_session_delayed_request {
|
|
/*! Method of the request */
|
|
enum delayed_method method;
|
|
/*! Callback to call when the delayed request is created. */
|
|
ast_sip_session_request_creation_cb on_request_creation;
|
|
/*! Callback to call when the delayed request SDP is created */
|
|
ast_sip_session_sdp_creation_cb on_sdp_creation;
|
|
/*! Callback to call when the delayed request receives a response */
|
|
ast_sip_session_response_cb on_response;
|
|
/*! Whether to generate new SDP */
|
|
int generate_new_sdp;
|
|
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_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;
|
|
return delay;
|
|
}
|
|
|
|
static int send_delayed_request(struct ast_sip_session *session, struct ast_sip_session_delayed_request *delay)
|
|
{
|
|
ast_debug(3, "Endpoint '%s(%s)' sending delayed %s request.\n",
|
|
ast_sorcery_object_get_id(session->endpoint),
|
|
session->channel ? ast_channel_name(session->channel) : "",
|
|
delayed_method2str(delay->method));
|
|
|
|
switch (delay->method) {
|
|
case DELAYED_METHOD_INVITE:
|
|
ast_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);
|
|
return 0;
|
|
case DELAYED_METHOD_UPDATE:
|
|
ast_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);
|
|
return 0;
|
|
case DELAYED_METHOD_BYE:
|
|
ast_sip_session_terminate(session, 0);
|
|
return 0;
|
|
}
|
|
ast_log(LOG_WARNING, "Don't know how to send delayed %s(%d) request.\n",
|
|
delayed_method2str(delay->method), delay->method);
|
|
return -1;
|
|
}
|
|
|
|
/*!
|
|
* \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;
|
|
|
|
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);
|
|
res = send_delayed_request(session, delay);
|
|
ast_free(delay);
|
|
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);
|
|
return res;
|
|
}
|
|
|
|
/*!
|
|
* \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;
|
|
|
|
/* 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);
|
|
res = send_delayed_request(session, delay);
|
|
ast_free(delay);
|
|
break;
|
|
}
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END;
|
|
|
|
ao2_ref(session, -1);
|
|
return res;
|
|
}
|
|
|
|
/*!
|
|
* \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;
|
|
|
|
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);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
/*!
|
|
* \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_delayed_request *delay = delayed_request_alloc(method,
|
|
on_request, on_sdp_creation, on_response, generate_new_sdp);
|
|
|
|
if (!delay) {
|
|
return -1;
|
|
}
|
|
|
|
if (method == DELAYED_METHOD_BYE) {
|
|
/* 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);
|
|
}
|
|
return 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;
|
|
|
|
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);
|
|
}
|
|
}
|
|
return 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_name_addr *dlg_info_name_addr;
|
|
pjsip_sip_uri *dlg_info_uri;
|
|
int restricted;
|
|
|
|
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_info_name_addr = (pjsip_name_addr *) dlg_info->uri;
|
|
dlg_info_uri = pjsip_uri_get_uri(dlg_info_name_addr);
|
|
|
|
if (session->endpoint->id.trust_outbound || !restricted) {
|
|
ast_sip_modify_id_header(dlg_pool, dlg_info, &connected_id);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
ast_sip_add_usereqphone(session->endpoint, dlg_pool, dlg_info->uri);
|
|
|
|
/* 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);
|
|
|
|
/* 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_strlen_zero(session->endpoint->fromdomain)) {
|
|
pj_strdup2(dlg_pool, &dlg_info_uri->host, "anonymous.invalid");
|
|
}
|
|
}
|
|
}
|
|
|
|
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)
|
|
{
|
|
pjsip_inv_session *inv_session = session->inv_session;
|
|
pjmedia_sdp_session *new_sdp = NULL;
|
|
pjsip_tx_data *tdata;
|
|
|
|
if (inv_session->state == PJSIP_INV_STATE_DISCONNECTED) {
|
|
/* Don't try to do anything with a hung-up call */
|
|
ast_debug(3, "Not sending reinvite to %s because of disconnected state...\n",
|
|
ast_sorcery_object_get_id(session->endpoint));
|
|
return 0;
|
|
}
|
|
|
|
/* If the dialog has not yet been established we have to defer until it has */
|
|
if (inv_session->dlg->state != PJSIP_DIALOG_STATE_ESTABLISHED) {
|
|
ast_debug(3, "Delay sending request to %s because dialog has not been established...\n",
|
|
ast_sorcery_object_get_id(session->endpoint));
|
|
return 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);
|
|
}
|
|
|
|
if (method == AST_SIP_SESSION_REFRESH_METHOD_INVITE) {
|
|
if (inv_session->invite_tsx) {
|
|
/* We can't send a reinvite yet, so delay it */
|
|
ast_debug(3, "Delay sending reinvite to %s because of outstanding transaction...\n",
|
|
ast_sorcery_object_get_id(session->endpoint));
|
|
return delay_request(session, on_request_creation, on_sdp_creation,
|
|
on_response, generate_new_sdp, DELAYED_METHOD_INVITE);
|
|
} 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_debug(3, "Not sending reinvite to %s because not in confirmed state...\n",
|
|
ast_sorcery_object_get_id(session->endpoint));
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
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) {
|
|
ast_debug(3, "Delay session refresh with new SDP to %s because SDP negotiation is not yet done...\n",
|
|
ast_sorcery_object_get_id(session->endpoint));
|
|
return 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);
|
|
}
|
|
|
|
new_sdp = generate_session_refresh_sdp(session);
|
|
if (!new_sdp) {
|
|
ast_log(LOG_ERROR, "Failed to generate session refresh SDP. Not sending session refresh\n");
|
|
return -1;
|
|
}
|
|
if (on_sdp_creation) {
|
|
if (on_sdp_creation(session, new_sdp)) {
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
if (method == AST_SIP_SESSION_REFRESH_METHOD_INVITE) {
|
|
if (pjsip_inv_reinvite(inv_session, NULL, new_sdp, &tdata)) {
|
|
ast_log(LOG_WARNING, "Failed to create reinvite properly.\n");
|
|
return -1;
|
|
}
|
|
} else if (pjsip_inv_update(inv_session, NULL, new_sdp, &tdata)) {
|
|
ast_log(LOG_WARNING, "Failed to create UPDATE properly.\n");
|
|
return -1;
|
|
}
|
|
if (on_request_creation) {
|
|
if (on_request_creation(session, tdata)) {
|
|
return -1;
|
|
}
|
|
}
|
|
ast_debug(3, "Sending session refresh SDP via %s to %s\n",
|
|
method == AST_SIP_SESSION_REFRESH_METHOD_INVITE ? "re-INVITE" : "UPDATE",
|
|
ast_sorcery_object_get_id(session->endpoint));
|
|
ast_sip_session_send_request_with_cb(session, tdata, on_response);
|
|
return 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 pjsip_module session_module = {
|
|
.name = {"Session Module", 14},
|
|
.priority = PJSIP_MOD_PRIORITY_APPLICATION,
|
|
.on_rx_request = session_on_rx_request,
|
|
};
|
|
|
|
/*! \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;
|
|
|
|
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);
|
|
RAII_VAR(struct ast_sip_session_media *, session_media, NULL, ao2_cleanup);
|
|
enum ast_sip_session_sdp_stream_defer res;
|
|
|
|
/* We need a null-terminated version of the media string */
|
|
ast_copy_pj_str(media, &sdp->media[i]->desc.media, sizeof(media));
|
|
|
|
session_media = ao2_find(session->media, media, OBJ_KEY);
|
|
if (!session_media) {
|
|
/* if the session_media doesn't exist, there weren't
|
|
* any handlers at the time of its creation */
|
|
continue;
|
|
}
|
|
|
|
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(1, "No registered SDP handlers for media type '%s'\n", 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;
|
|
|
|
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->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) {
|
|
pjsip_endpt_send_response2(ast_sip_get_pjsip_endpoint(), rdata, tdata, NULL, NULL);
|
|
}
|
|
|
|
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) {
|
|
const pjmedia_sdp_session *local;
|
|
int i;
|
|
|
|
ast_queue_unhold(session->channel);
|
|
|
|
pjmedia_sdp_neg_get_active_local(session->inv_session->neg, &local);
|
|
if (!local) {
|
|
return PJ_FALSE;
|
|
}
|
|
|
|
/*
|
|
* 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 < local->media_count; ++i) {
|
|
pjmedia_sdp_media *m = local->media[i];
|
|
pjmedia_sdp_attr *recvonly;
|
|
pjmedia_sdp_attr *inactive;
|
|
|
|
recvonly = pjmedia_sdp_attr_find2(m->attr_count, m->attr, "recvonly", NULL);
|
|
inactive = pjmedia_sdp_attr_find2(m->attr_count, m->attr, "inactive", NULL);
|
|
if (recvonly || inactive) {
|
|
pjmedia_sdp_attr *to_remove = recvonly ?: inactive;
|
|
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);
|
|
}
|
|
}
|
|
|
|
return PJ_FALSE;
|
|
}
|
|
|
|
if (!sdp_requires_deferral(session, sdp_info->sdp)) {
|
|
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;
|
|
|
|
if (!(offer = create_local_sdp(session->inv_session, session, NULL))) {
|
|
pjsip_inv_terminate(session->inv_session, 500, PJ_FALSE);
|
|
return -1;
|
|
}
|
|
|
|
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) {
|
|
return -1;
|
|
}
|
|
|
|
return 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_media_dtor(void *obj)
|
|
{
|
|
struct ast_sip_session_media *session_media = obj;
|
|
struct sdp_handler_list *handler_list;
|
|
/* It is possible for SDP handlers to allocate memory on a session_media but
|
|
* not end up getting set as the handler for this session_media. This traversal
|
|
* ensures that all memory allocated by SDP handlers on the session_media is
|
|
* cleared (as well as file descriptors, etc.).
|
|
*/
|
|
handler_list = ao2_find(sdp_handlers, session_media->stream_type, OBJ_KEY);
|
|
if (handler_list) {
|
|
struct ast_sip_session_sdp_handler *handler;
|
|
|
|
AST_LIST_TRAVERSE(&handler_list->list, handler, next) {
|
|
handler->stream_destroy(session_media);
|
|
}
|
|
}
|
|
ao2_cleanup(handler_list);
|
|
if (session_media->srtp) {
|
|
ast_sdp_srtp_destroy(session_media->srtp);
|
|
}
|
|
}
|
|
|
|
static void session_destructor(void *obj)
|
|
{
|
|
struct ast_sip_session *session = obj;
|
|
struct ast_sip_session_supplement *supplement;
|
|
struct ast_sip_session_delayed_request *delay;
|
|
const char *endpoint_name = session->endpoint ?
|
|
ast_sorcery_object_get_id(session->endpoint) : "<none>";
|
|
|
|
ast_debug(3, "Destroying SIP session with endpoint %s\n", endpoint_name);
|
|
|
|
ast_test_suite_event_notify("SESSION_DESTROYING",
|
|
"Endpoint: %s\r\n"
|
|
"AOR: %s\r\n"
|
|
"Contact: %s"
|
|
, endpoint_name
|
|
, session->aor ? ast_sorcery_object_get_id(session->aor) : "<none>"
|
|
, session->contact ? ast_sorcery_object_get_id(session->contact) : "<none>"
|
|
);
|
|
|
|
while ((supplement = AST_LIST_REMOVE_HEAD(&session->supplements, next))) {
|
|
if (supplement->session_destroy) {
|
|
supplement->session_destroy(session);
|
|
}
|
|
ast_free(supplement);
|
|
}
|
|
|
|
ast_taskprocessor_unreference(session->serializer);
|
|
ao2_cleanup(session->datastores);
|
|
ao2_cleanup(session->media);
|
|
|
|
AST_LIST_HEAD_DESTROY(&session->supplements);
|
|
while ((delay = AST_LIST_REMOVE_HEAD(&session->delayed_requests, next))) {
|
|
ast_free(delay);
|
|
}
|
|
ast_party_id_free(&session->id);
|
|
ao2_cleanup(session->endpoint);
|
|
ao2_cleanup(session->aor);
|
|
ao2_cleanup(session->contact);
|
|
ao2_cleanup(session->req_caps);
|
|
ao2_cleanup(session->direct_media_cap);
|
|
|
|
ast_dsp_free(session->dsp);
|
|
|
|
if (session->inv_session) {
|
|
pjsip_dlg_dec_session(session->inv_session->dlg, &session_module);
|
|
}
|
|
|
|
ast_test_suite_event_notify("SESSION_DESTROYED", "Endpoint: %s", endpoint_name);
|
|
}
|
|
|
|
static int add_supplements(struct ast_sip_session *session)
|
|
{
|
|
struct ast_sip_session_supplement *iter;
|
|
SCOPED_LOCK(lock, &session_supplements, AST_RWLIST_RDLOCK, AST_RWLIST_UNLOCK);
|
|
|
|
AST_RWLIST_TRAVERSE(&session_supplements, iter, next) {
|
|
struct ast_sip_session_supplement *copy = supplement_dup(iter);
|
|
if (!copy) {
|
|
return -1;
|
|
}
|
|
AST_LIST_INSERT_TAIL(&session->supplements, copy, next);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int add_session_media(void *obj, void *arg, int flags)
|
|
{
|
|
struct sdp_handler_list *handler_list = obj;
|
|
struct ast_sip_session *session = arg;
|
|
RAII_VAR(struct ast_sip_session_media *, session_media, NULL, ao2_cleanup);
|
|
|
|
session_media = ao2_alloc(sizeof(*session_media) + strlen(handler_list->stream_type), session_media_dtor);
|
|
if (!session_media) {
|
|
return CMP_STOP;
|
|
}
|
|
session_media->encryption = session->endpoint->media.rtp.encryption;
|
|
session_media->keepalive_sched_id = -1;
|
|
session_media->timeout_sched_id = -1;
|
|
/* Safe use of strcpy */
|
|
strcpy(session_media->stream_type, handler_list->stream_type);
|
|
ao2_link(session->media, session_media);
|
|
return 0;
|
|
}
|
|
|
|
/*! \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;
|
|
struct ast_sip_session_supplement *iter;
|
|
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->req_caps = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
|
|
if (!session->req_caps) {
|
|
return NULL;
|
|
}
|
|
session->datastores = ao2_container_alloc(DATASTORE_BUCKETS, datastore_hash, datastore_cmp);
|
|
if (!session->datastores) {
|
|
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);
|
|
|
|
session->media = ao2_container_alloc(MEDIA_BUCKETS, session_media_hash, session_media_cmp);
|
|
if (!session->media) {
|
|
return NULL;
|
|
}
|
|
/* fill session->media with available types */
|
|
ao2_callback(sdp_handlers, OBJ_NODATA, add_session_media, session);
|
|
|
|
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);
|
|
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;
|
|
|
|
if (add_supplements(session)) {
|
|
/* Release the ref held by session->inv_session */
|
|
ao2_ref(session, -1);
|
|
return NULL;
|
|
}
|
|
AST_LIST_TRAVERSE(&session->supplements, iter, next) {
|
|
if (iter->session_begin) {
|
|
iter->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 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);
|
|
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(1, "A reINVITE is being challenged.\n");
|
|
return PJ_FALSE;
|
|
}
|
|
ast_debug(1, "Initial INVITE is being challenged.\n");
|
|
|
|
session = inv->mod_data[session_module.id];
|
|
|
|
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_format_cap *req_caps)
|
|
{
|
|
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;
|
|
|
|
/* 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));
|
|
return NULL;
|
|
}
|
|
|
|
if (!(dlg = ast_sip_create_dialog_uac(endpoint, uri, request_user))) {
|
|
return NULL;
|
|
}
|
|
|
|
if (setup_outbound_invite_auth(dlg)) {
|
|
pjsip_dlg_terminate(dlg);
|
|
return NULL;
|
|
}
|
|
|
|
if (pjsip_inv_create_uac(dlg, NULL, endpoint->extensions.flags, &inv_session) != PJ_SUCCESS) {
|
|
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
|
|
|
|
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);
|
|
ast_party_id_copy(&session->id, &endpoint->id.self);
|
|
|
|
if (ast_format_cap_count(req_caps)) {
|
|
/* get joint caps between req_caps and endpoint caps */
|
|
struct ast_format_cap *joint_caps = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
|
|
|
|
ast_format_cap_get_compatible(req_caps, endpoint->media.codecs, joint_caps);
|
|
|
|
/* if joint caps */
|
|
if (ast_format_cap_count(joint_caps)) {
|
|
/* copy endpoint caps into session->req_caps */
|
|
ast_format_cap_append_from_cap(session->req_caps,
|
|
endpoint->media.codecs, AST_MEDIA_TYPE_UNKNOWN);
|
|
/* replace instances of joint caps equivalents in session->req_caps */
|
|
ast_format_cap_replace_from_cap(session->req_caps, joint_caps,
|
|
AST_MEDIA_TYPE_UNKNOWN);
|
|
}
|
|
ao2_cleanup(joint_caps);
|
|
}
|
|
|
|
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);
|
|
return NULL;
|
|
}
|
|
|
|
/* Avoid unnecessary ref manipulation to return a session */
|
|
ret_session = session;
|
|
session = NULL;
|
|
return 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;
|
|
|
|
if (session->defer_terminate) {
|
|
session->terminate_while_deferred = 1;
|
|
return;
|
|
}
|
|
|
|
if (!response) {
|
|
response = 603;
|
|
}
|
|
|
|
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, "Delay sending BYE to %s because of outstanding transaction...\n",
|
|
ast_sorcery_object_get_id(session->endpoint));
|
|
/* 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);
|
|
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))) {
|
|
ast_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;
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
session->scheduled_termination.id = 0;
|
|
ao2_ref(session, +1);
|
|
session->scheduled_termination.user_data = session;
|
|
session->scheduled_termination.cb = 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.
|
|
*
|
|
* \return Nothing
|
|
*/
|
|
static void sip_session_defer_termination_stop_timer(struct ast_sip_session *session)
|
|
{
|
|
if (pj_timer_heap_cancel(pjsip_endpt_get_timer_heap(ast_sip_get_pjsip_endpoint()),
|
|
&session->scheduled_termination)) {
|
|
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, "Ending session (%p) after being deferred\n", 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;
|
|
pjsip_sip_uri *sip_ruri;
|
|
struct ast_features_pickup_config *pickup_cfg;
|
|
const char *pickupexten;
|
|
|
|
if (!PJSIP_URI_SCHEME_IS_SIP(ruri) && !PJSIP_URI_SCHEME_IS_SIPS(ruri)) {
|
|
return SIP_GET_DEST_UNSUPPORTED_URI;
|
|
}
|
|
|
|
sip_ruri = pjsip_uri_get_uri(ruri);
|
|
ast_copy_pj_str(session->exten, &sip_ruri->user, 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(session->channel);
|
|
if (!pickup_cfg) {
|
|
ast_log(LOG_ERROR, "Unable to retrieve pickup configuration options. Unable to detect call pickup extension\n");
|
|
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)) {
|
|
size_t size = pj_strlen(&sip_ruri->host) + 1;
|
|
char *domain = ast_alloca(size);
|
|
|
|
ast_copy_pj_str(domain, &sip_ruri->host, size);
|
|
pbx_builtin_setvar_helper(session->channel, "SIPDOMAIN", domain);
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
|
|
if (pjsip_inv_verify_request(rdata, &options, NULL, NULL, ast_sip_get_pjsip_endpoint(), &tdata) != PJ_SUCCESS) {
|
|
if (tdata) {
|
|
pjsip_endpt_send_response2(ast_sip_get_pjsip_endpoint(), rdata, tdata, NULL, NULL);
|
|
} else {
|
|
pjsip_endpt_respond_stateless(ast_sip_get_pjsip_endpoint(), rdata, 500, NULL, NULL, NULL);
|
|
}
|
|
return NULL;
|
|
}
|
|
dlg = ast_sip_create_dialog_uas(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;
|
|
}
|
|
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);
|
|
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) {
|
|
if (pjsip_inv_initial_answer(inv_session, rdata, 500, NULL, NULL, &tdata) != PJ_SUCCESS) {
|
|
pjsip_inv_terminate(inv_session, 500, PJ_FALSE);
|
|
}
|
|
pjsip_inv_send_msg(inv_session, tdata);
|
|
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 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;
|
|
|
|
/* 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_log(LOG_ERROR, "Session already DISCONNECTED [reason=%d (%s)]\n",
|
|
invite->session->inv_session->cause,
|
|
pjsip_get_status_text(invite->session->inv_session->cause)->ptr);
|
|
#ifdef HAVE_PJSIP_INV_SESSION_REF
|
|
pjsip_inv_dec_ref(invite->session->inv_session);
|
|
#endif
|
|
return -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:
|
|
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_debug(1, "Call from '%s' (%s:%s:%d) to extension '%s' - partial match\n", ast_sorcery_object_get_id(invite->session->endpoint),
|
|
invite->rdata->tp_info.transport->type_name, invite->rdata->pkt_info.src_name, invite->rdata->pkt_info.src_port, 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_log(LOG_NOTICE, "Call from '%s' (%s:%s:%d) to extension '%s' rejected because extension not found in context '%s'.\n",
|
|
ast_sorcery_object_get_id(invite->session->endpoint), invite->rdata->tp_info.transport->type_name, invite->rdata->pkt_info.src_name,
|
|
invite->rdata->pkt_info.src_port, 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;
|
|
};
|
|
|
|
pjsip_timer_setting_default(&timer);
|
|
timer.min_se = invite->session->endpoint->extensions.timer.min_se;
|
|
timer.sess_expires = invite->session->endpoint->extensions.timer.sess_expires;
|
|
pjsip_timer_init_session(invite->session->inv_session, &timer);
|
|
|
|
/*
|
|
* At this point, we've verified what we can that won't take awhile,
|
|
* so let's go ahead and send a 100 Trying out to stop any
|
|
* retransmissions.
|
|
*/
|
|
if (pjsip_inv_initial_answer(invite->session->inv_session, invite->rdata, 100, NULL, NULL, &tdata) != PJ_SUCCESS) {
|
|
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:
|
|
#ifdef HAVE_PJSIP_INV_SESSION_REF
|
|
pjsip_inv_dec_ref(invite->session->inv_session);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static void handle_new_invite_request(pjsip_rx_data *rdata)
|
|
{
|
|
RAII_VAR(struct ast_sip_endpoint *, endpoint,
|
|
ast_pjsip_rdata_get_endpoint(rdata), ao2_cleanup);
|
|
pjsip_tx_data *tdata = NULL;
|
|
pjsip_inv_session *inv_session = NULL;
|
|
struct ast_sip_session *session;
|
|
struct new_invite invite;
|
|
|
|
ast_assert(endpoint != NULL);
|
|
|
|
inv_session = pre_session_setup(rdata, endpoint);
|
|
if (!inv_session) {
|
|
/* pre_session_setup() returns a response on failure */
|
|
return;
|
|
}
|
|
|
|
#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");
|
|
if (inv_session->state != PJSIP_INV_STATE_DISCONNECTED) {
|
|
if (pjsip_inv_initial_answer(inv_session, rdata, 500, NULL, NULL, &tdata) == PJ_SUCCESS) {
|
|
pjsip_inv_terminate(inv_session, 500, PJ_FALSE);
|
|
} else {
|
|
pjsip_inv_send_msg(inv_session, tdata);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
session = ast_sip_session_alloc(endpoint, NULL, inv_session, rdata);
|
|
if (!session) {
|
|
if (pjsip_inv_initial_answer(inv_session, rdata, 500, NULL, NULL, &tdata) == PJ_SUCCESS) {
|
|
pjsip_inv_terminate(inv_session, 500, PJ_FALSE);
|
|
} else {
|
|
pjsip_inv_send_msg(inv_session, tdata);
|
|
}
|
|
#ifdef HAVE_PJSIP_INV_SESSION_REF
|
|
pjsip_inv_dec_ref(inv_session);
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
|
|
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;
|
|
}
|
|
/*!
|
|
* \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;
|
|
pjsip_dialog *dlg = pjsip_rdata_get_dlg(rdata);
|
|
pjsip_inv_session *inv_session;
|
|
|
|
switch (rdata->msg_info.msg->line.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;
|
|
}
|
|
|
|
return handled;
|
|
}
|
|
|
|
static void resend_reinvite(pj_timer_heap_t *timer, pj_timer_entry *entry)
|
|
{
|
|
struct ast_sip_session *session = entry->user_data;
|
|
|
|
ast_debug(3, "Endpoint '%s(%s)' re-INVITE collision timer expired.\n",
|
|
ast_sorcery_object_get_id(session->endpoint),
|
|
session->channel ? ast_channel_name(session->channel) : "");
|
|
|
|
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;
|
|
|
|
ast_debug(3, "Endpoint '%s(%s)' re-INVITE collision.\n",
|
|
ast_sorcery_object_get_id(session->endpoint),
|
|
session->channel ? ast_channel_name(session->channel) : "");
|
|
if (delay_request(session, NULL, NULL, on_response, 1, DELAYED_METHOD_INVITE)) {
|
|
return;
|
|
}
|
|
if (pj_timer_entry_running(&session->rescheduled_reinvite)) {
|
|
/* Timer already running. Something weird is going on. */
|
|
ast_debug(1, "Endpoint '%s(%s)' re-INVITE collision while timer running!!!\n",
|
|
ast_sorcery_object_get_id(session->endpoint),
|
|
session->channel ? ast_channel_name(session->channel) : "");
|
|
return;
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
ast_debug(3, "Method is %.*s\n", (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;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
ast_debug(3, "Response is %d %.*s\n", 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);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int handle_incoming(struct ast_sip_session *session, pjsip_rx_data *rdata,
|
|
enum ast_sip_session_response_priority response_priority)
|
|
{
|
|
ast_debug(3, "Received %s\n", rdata->msg_info.msg->type == PJSIP_REQUEST_MSG ?
|
|
"request" : "response");
|
|
|
|
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;
|
|
|
|
ast_debug(3, "Method is %.*s\n", (int) pj_strlen(&req.method.name), pj_strbuf(&req.method.name));
|
|
AST_LIST_TRAVERSE(&session->supplements, supplement, next) {
|
|
if (supplement->outgoing_request && does_method_match(&req.method.name, supplement->method)) {
|
|
supplement->outgoing_request(session, tdata);
|
|
}
|
|
}
|
|
}
|
|
|
|
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);
|
|
ast_debug(3, "Method is %.*s, Response is %d %.*s\n", (int) pj_strlen(&cseq->method.name),
|
|
pj_strbuf(&cseq->method.name), status.code, (int) pj_strlen(&status.reason),
|
|
pj_strbuf(&status.reason));
|
|
|
|
AST_LIST_TRAVERSE(&session->supplements, supplement, next) {
|
|
if (supplement->outgoing_response && does_method_match(&cseq->method.name, supplement->method)) {
|
|
supplement->outgoing_response(session, tdata);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int session_end(void *vsession)
|
|
{
|
|
struct ast_sip_session *session = vsession;
|
|
struct ast_sip_session_supplement *iter;
|
|
|
|
/* Stop the scheduled termination */
|
|
sip_session_defer_termination_stop_timer(session);
|
|
|
|
/* Session is dead. Notify the supplements. */
|
|
AST_LIST_TRAVERSE(&session->supplements, iter, next) {
|
|
if (iter->session_end) {
|
|
iter->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;
|
|
|
|
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,
|
|
"Endpoint '%s(%s)': Ending session due to incomplete SDP negotiation. %s\n",
|
|
ast_sorcery_object_get_id(session->endpoint),
|
|
session->channel ? ast_channel_name(session->channel) : "",
|
|
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)
|
|
{
|
|
struct ast_sip_session *session = inv->mod_data[session_module.id];
|
|
pjsip_event_id_e type;
|
|
|
|
if (e) {
|
|
print_debug_details(inv, NULL, e);
|
|
type = e->type;
|
|
} else {
|
|
type = PJSIP_EVENT_UNKNOWN;
|
|
}
|
|
|
|
if (!session) {
|
|
return;
|
|
}
|
|
|
|
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, "Source of transaction state change is %s\n", 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, "Deferring session (%p) end\n", session);
|
|
session->ended_while_deferred = 1;
|
|
return;
|
|
}
|
|
|
|
if (ast_sip_push_task(session->serializer, session_end, session)) {
|
|
/* Do it anyway even though this is not the right thread. */
|
|
session_end(session);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void session_inv_on_new_session(pjsip_inv_session *inv, pjsip_event *e)
|
|
{
|
|
/* XXX STUB */
|
|
}
|
|
|
|
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;
|
|
struct ast_sip_session *session;
|
|
pjsip_tx_data *tdata;
|
|
|
|
/*
|
|
* A race condition exists at shutdown where the res_pjsip_session can be
|
|
* unloaded but this callback may still get called afterwards. In this case
|
|
* the id may end up being -1 which is useless to us. To work around this
|
|
* we store the current value and check/use it.
|
|
*/
|
|
if (id < 0) {
|
|
return;
|
|
}
|
|
|
|
session = inv->mod_data[id];
|
|
|
|
print_debug_details(inv, tsx, e);
|
|
if (!session) {
|
|
/* The session has ended. Ignore the transaction change. */
|
|
return;
|
|
}
|
|
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);
|
|
return;
|
|
}
|
|
if (inv->state == PJSIP_INV_STATE_CONFIRMED) {
|
|
ast_debug(1, "reINVITE received final response code %d\n",
|
|
tsx->status_code);
|
|
if ((tsx->status_code == 401 || tsx->status_code == 407)
|
|
&& !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);
|
|
return;
|
|
}
|
|
if (tsx->status_code != 488) {
|
|
/* Other reinvite failures (except 488) result in destroying the session. */
|
|
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 && 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.
|
|
*
|
|
* 3) We didn't send a CANCEL 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, "Endpoint '%s(%s)': Incomplete SDP negotiation cancelled session. %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));
|
|
} else if (pjsip_inv_end_session(inv, 500, NULL, &tdata) == PJ_SUCCESS
|
|
&& tdata) {
|
|
ast_debug(1, "Endpoint '%s(%s)': Ending session due to RFC5407 race condition. %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));
|
|
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 received final response code %d\n",
|
|
(int) pj_strlen(&tsx->method.name), pj_strbuf(&tsx->method.name),
|
|
tsx->status_code);
|
|
if ((tsx->status_code == 401 || tsx->status_code == 407)
|
|
&& !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);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (cb) {
|
|
cb(session, e->body.tsx_state.src.rdata);
|
|
}
|
|
break;
|
|
case PJSIP_EVENT_TRANSPORT_ERROR:
|
|
if (inv->state == PJSIP_INV_STATE_DISCONNECTED) {
|
|
/*
|
|
* Clear the module data now to block session_inv_on_state_changed()
|
|
* from calling session_end() if it hasn't already done so.
|
|
*/
|
|
inv->mod_data[id] = NULL;
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
break;
|
|
case PJSIP_EVENT_TIMER:
|
|
/*
|
|
* The timer event is run by the pjsip monitor thread and not
|
|
* by the session serializer.
|
|
*/
|
|
if (inv->state == PJSIP_INV_STATE_DISCONNECTED) {
|
|
/*
|
|
* 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;
|
|
}
|
|
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 */
|
|
return;
|
|
}
|
|
|
|
if (tsx->method.id == PJSIP_INVITE_METHOD) {
|
|
if (tsx->state == PJSIP_TSX_STATE_PROCEEDING) {
|
|
ast_debug(3, "Endpoint '%s(%s)' INVITE delay check. tsx-state:%s\n",
|
|
ast_sorcery_object_get_id(session->endpoint),
|
|
session->channel ? ast_channel_name(session->channel) : "",
|
|
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, "Endpoint '%s(%s)' INVITE delay check. tsx-state:%s\n",
|
|
ast_sorcery_object_get_id(session->endpoint),
|
|
session->channel ? ast_channel_name(session->channel) : "",
|
|
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, "Endpoint '%s(%s)' UPDATE delay check. tsx-state:%s\n",
|
|
ast_sorcery_object_get_id(session->endpoint),
|
|
session->channel ? ast_channel_name(session->channel) : "",
|
|
pjsip_tsx_state_str(tsx->state));
|
|
check_delayed_requests(session, update_completed);
|
|
}
|
|
}
|
|
|
|
static int add_sdp_streams(void *obj, void *arg, void *data, int flags)
|
|
{
|
|
struct ast_sip_session_media *session_media = obj;
|
|
pjmedia_sdp_session *answer = arg;
|
|
struct ast_sip_session *session = data;
|
|
struct ast_sip_session_sdp_handler *handler = session_media->handler;
|
|
RAII_VAR(struct sdp_handler_list *, handler_list, NULL, ao2_cleanup);
|
|
int res;
|
|
|
|
if (handler) {
|
|
/* if an already assigned handler reports a catastrophic error, fail */
|
|
res = handler->create_outgoing_sdp_stream(session, session_media, answer);
|
|
if (res < 0) {
|
|
return 0;
|
|
}
|
|
return CMP_MATCH;
|
|
}
|
|
|
|
handler_list = ao2_find(sdp_handlers, session_media->stream_type, OBJ_KEY);
|
|
if (!handler_list) {
|
|
return CMP_MATCH;
|
|
}
|
|
|
|
/* 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);
|
|
if (res < 0) {
|
|
/* catastrophic error */
|
|
return 0;
|
|
}
|
|
if (res > 0) {
|
|
/* Handled by this handler. Move to the next stream */
|
|
session_media_set_handler(session_media, handler);
|
|
return CMP_MATCH;
|
|
}
|
|
}
|
|
|
|
/* streams that weren't handled won't be included in generated outbound SDP */
|
|
return CMP_MATCH;
|
|
}
|
|
|
|
static struct pjmedia_sdp_session *create_local_sdp(pjsip_inv_session *inv, struct ast_sip_session *session, const pjmedia_sdp_session *offer)
|
|
{
|
|
RAII_VAR(struct ao2_iterator *, successful, NULL, ao2_iterator_cleanup);
|
|
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;
|
|
|
|
if (inv->state == PJSIP_INV_STATE_DISCONNECTED) {
|
|
ast_log(LOG_ERROR, "Failed to create session SDP. Session has been already disconnected\n");
|
|
return NULL;
|
|
}
|
|
|
|
if (!inv->pool_prov || !(local = PJ_POOL_ZALLOC_T(inv->pool_prov, pjmedia_sdp_session))) {
|
|
return NULL;
|
|
}
|
|
|
|
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);
|
|
|
|
/* Now let the handlers add streams of various types, pjmedia will automatically reorder the media streams for us */
|
|
successful = ao2_callback_data(session->media, OBJ_MULTIPLE, add_sdp_streams, local, session);
|
|
if (!successful || ao2_iterator_count(successful) != ao2_container_count(session->media)) {
|
|
/* Something experienced a catastrophic failure */
|
|
return NULL;
|
|
}
|
|
|
|
/* Use the connection details of the first media stream if possible for SDP level */
|
|
if (local->media_count) {
|
|
int stream;
|
|
|
|
/* Since we are using the first media stream as the SDP level we can get rid of it
|
|
* from the stream itself
|
|
*/
|
|
local->conn = local->media[0]->conn;
|
|
local->media[0]->conn = NULL;
|
|
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);
|
|
|
|
/* Go through each media stream seeing if the connection details actually differ,
|
|
* if not just use SDP level and reduce the SDP size
|
|
*/
|
|
for (stream = 1; stream < local->media_count; stream++) {
|
|
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;
|
|
}
|
|
}
|
|
} else {
|
|
local->origin.net_type = STR_IN;
|
|
local->origin.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->origin.addr, session->endpoint->media.address);
|
|
} else {
|
|
pj_strdup2(inv->pool_prov, &local->origin.addr, ast_sip_get_host_ip_string(session->endpoint->media.rtp.ipv6 ? pj_AF_INET6() : pj_AF_INET()));
|
|
}
|
|
}
|
|
|
|
return local;
|
|
}
|
|
|
|
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;
|
|
|
|
if (handle_incoming_sdp(session, offer)) {
|
|
return;
|
|
}
|
|
|
|
if ((answer = create_local_sdp(inv, session, offer))) {
|
|
pjsip_inv_set_sdp_answer(inv, answer);
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
static void session_inv_on_create_offer(pjsip_inv_session *inv, pjmedia_sdp_session **p_offer)
|
|
{
|
|
/* XXX STUB */
|
|
}
|
|
#endif
|
|
|
|
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;
|
|
|
|
if (!session || !session->channel) {
|
|
/*
|
|
* If we don't have a session or channel then we really
|
|
* don't care about media updates.
|
|
* Just ignore
|
|
*/
|
|
return;
|
|
}
|
|
|
|
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);
|
|
return;
|
|
}
|
|
|
|
handle_negotiated_sdp(session, local, remote);
|
|
}
|
|
|
|
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 = inv->mod_data[session_module.id];
|
|
const pjsip_sip_uri *uri;
|
|
|
|
if (!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_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);
|
|
struct pjmedia_sdp_session *sdp;
|
|
int stream;
|
|
|
|
/* SDP produced by us directly will never be multipart */
|
|
if (!transport_state || hook || !tdata->msg->body || pj_stricmp2(&tdata->msg->body->content_type.type, "application") ||
|
|
pj_stricmp2(&tdata->msg->body->content_type.subtype, "sdp") || ast_strlen_zero(transport->external_media_address)) {
|
|
return;
|
|
}
|
|
|
|
sdp = tdata->msg->body->data;
|
|
|
|
if (sdp->conn) {
|
|
char host[NI_MAXHOST];
|
|
struct ast_sockaddr addr = { { 0, } };
|
|
|
|
ast_copy_pj_str(host, &sdp->conn->addr, sizeof(host));
|
|
ast_sockaddr_parse(&addr, host, PARSE_PORT_FORBID);
|
|
|
|
if (!transport_state->localnet
|
|
|| ast_apply_ha(transport_state->localnet, &addr) != AST_SENSE_ALLOW) {
|
|
ast_debug(5, "Setting external media address to %s\n", transport->external_media_address);
|
|
pj_strdup2(tdata->pool, &sdp->conn->addr, transport->external_media_address);
|
|
}
|
|
}
|
|
|
|
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(1, "No registered SDP handlers for media type '%s'\n", 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);
|
|
}
|
|
|
|
static int load_module(void)
|
|
{
|
|
pjsip_endpoint *endpt;
|
|
|
|
CHECK_PJSIP_MODULE_LOADED();
|
|
|
|
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(SDP_HANDLER_BUCKETS,
|
|
sdp_handler_list_hash, 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);
|
|
|
|
return AST_MODULE_LOAD_SUCCESS;
|
|
}
|
|
|
|
static int unload_module(void)
|
|
{
|
|
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,
|
|
);
|