Asterisk - The Open Source Telephony Project
21.4.1
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SIP T.38 handling. More...
#include "asterisk.h"
#include <pjsip.h>
#include <pjsip_ua.h>
#include <pjmedia.h>
#include <pjlib.h>
#include "asterisk/utils.h"
#include "asterisk/module.h"
#include "asterisk/udptl.h"
#include "asterisk/netsock2.h"
#include "asterisk/channel.h"
#include "asterisk/acl.h"
#include "asterisk/stream.h"
#include "asterisk/format_cache.h"
#include "asterisk/res_pjsip.h"
#include "asterisk/res_pjsip_session.h"
Go to the source code of this file.
Data Structures | |
struct | t38_parameters_task_data |
Structure for T.38 parameters task data. More... | |
struct | t38_state |
T.38 state information. More... | |
Macros | |
#define | T38_AUTOMATIC_REJECTION_SECONDS 5 |
The number of seconds after receiving a T.38 re-invite before automatically rejecting it. | |
Functions | |
static void | __reg_module (void) |
static void | __unreg_module (void) |
static int | apply_negotiated_sdp_stream (struct ast_sip_session *session, struct ast_sip_session_media *session_media, const struct pjmedia_sdp_session *local, const struct pjmedia_sdp_session *remote, int index, struct ast_stream *asterisk_stream) |
Function which applies a negotiated stream. | |
struct ast_module * | AST_MODULE_SELF_SYM (void) |
static void | change_outgoing_sdp_stream_media_address (pjsip_tx_data *tdata, struct pjmedia_sdp_media *stream, struct ast_sip_transport *transport) |
Function which updates the media stream with external media address, if applicable. | |
static int | create_outgoing_sdp_stream (struct ast_sip_session *session, struct ast_sip_session_media *session_media, struct pjmedia_sdp_session *sdp, const struct pjmedia_sdp_session *remote, struct ast_stream *stream) |
Function which creates an outgoing stream. | |
static enum ast_sip_session_sdp_stream_defer | defer_incoming_sdp_stream (struct ast_sip_session *session, struct ast_sip_session_media *session_media, const struct pjmedia_sdp_session *sdp, const struct pjmedia_sdp_media *stream) |
Function which defers an incoming media stream. | |
static int | load_module (void) |
Load the module. More... | |
static struct ast_frame * | media_session_udptl_read_callback (struct ast_sip_session *session, struct ast_sip_session_media *session_media) |
static int | media_session_udptl_write_callback (struct ast_sip_session *session, struct ast_sip_session_media *session_media, struct ast_frame *frame) |
static int | negotiate_incoming_sdp_stream (struct ast_sip_session *session, struct ast_sip_session_media *session_media, const struct pjmedia_sdp_session *sdp, int index, struct ast_stream *asterisk_stream) |
Function which negotiates an incoming media stream. | |
static void | stream_destroy (struct ast_sip_session_media *session_media) |
Function which destroys the UDPTL instance when session ends. | |
static void | t38_attach_framehook (struct ast_sip_session *session) |
Function called to attach T.38 framehook to channel when appropriate. | |
static int | t38_automatic_reject (void *obj) |
Task function which rejects a T.38 re-invite and resumes handling it. | |
static void | t38_automatic_reject_timer_cb (pj_timer_heap_t *timer_heap, struct pj_timer_entry *entry) |
Timer entry callback which queues a task to reject a T.38 re-invite and resume handling it. | |
static void | t38_change_state (struct ast_sip_session *session, struct ast_sip_session_media *session_media, struct t38_state *state, enum ast_sip_session_t38state new_state) |
Helper function for changing the T.38 state. | |
static int | t38_consume (void *data, enum ast_frame_type type) |
static struct ast_sip_session_media_state * | t38_create_media_state (struct ast_sip_session *session) |
Helper function which creates a media state for strictly T.38. | |
static struct ast_frame * | t38_framehook (struct ast_channel *chan, struct ast_frame *f, enum ast_framehook_event event, void *data) |
Frame hook callback for T.38 related stuff. | |
static unsigned int | t38_get_rate (enum ast_control_t38_rate rate) |
Get Max T.38 Transmission rate from T38 capabilities. | |
static int | t38_incoming_invite_request (struct ast_sip_session *session, struct pjsip_rx_data *rdata) |
Function called when an INVITE arrives. | |
static int | t38_initialize_session (struct ast_sip_session *session, struct ast_sip_session_media *session_media) |
Initializes UDPTL support on a session, only done when actually needed. | |
static int | t38_interpret_parameters (void *obj) |
Task for reacting to T.38 control frame. | |
static void | t38_interpret_sdp (struct t38_state *state, struct ast_sip_session *session, struct ast_sip_session_media *session_media, const struct pjmedia_sdp_media *stream) |
Parse a T.38 image stream and store the attribute information. | |
static void | t38_masq (void *data, int framehook_id, struct ast_channel *old_chan, struct ast_channel *new_chan) |
static void | t38_outgoing_invite_request (struct ast_sip_session *session, struct pjsip_tx_data *tdata) |
Function called when an INVITE is sent. | |
static struct t38_parameters_task_data * | t38_parameters_task_data_alloc (struct ast_sip_session *session, struct ast_frame *frame) |
Allocator for T.38 data. | |
static void | t38_parameters_task_data_destroy (void *obj) |
Destructor for T.38 data. | |
static int | t38_reinvite_response_cb (struct ast_sip_session *session, pjsip_rx_data *rdata) |
Callback for when a response is received for a T.38 re-invite. | |
static int | t38_reinvite_sdp_cb (struct ast_sip_session *session, pjmedia_sdp_session *sdp) |
Callback for when T.38 reinvite SDP is created. | |
static void | t38_state_destroy (void *obj) |
Destructor for T.38 state information. | |
static struct t38_state * | t38_state_get_or_alloc (struct ast_sip_session *session) |
Helper function which retrieves or allocates a T.38 state information datastore. | |
static int | unload_module (void) |
Unloads the SIP T.38 module from Asterisk. | |
Variables | |
static struct ast_module_info | __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "PJSIP T.38 UDPTL Support" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_CHANNEL_DRIVER, .requires = "res_pjsip,res_pjsip_session,udptl", } |
static struct ast_sockaddr | address |
Address for UDPTL. | |
static const struct ast_module_info * | ast_module_info = &__mod_info |
static struct ast_sip_session_sdp_handler | image_sdp_handler |
SDP handler for 'image' media stream. | |
static const struct ast_datastore_info | t38_datastore |
Datastore for attaching T.38 state information. More... | |
static const struct ast_datastore_info | t38_framehook_datastore |
static struct ast_sip_session_supplement | t38_supplement |
Supplement for adding framehook to session channel. | |
SIP T.38 handling.
Definition in file res_pjsip_t38.c.
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Load the module.
Module loading including tests for configuration or dependencies. This function can return AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_DECLINE, or AST_MODULE_LOAD_SUCCESS. If a dependency or environment variable fails tests return AST_MODULE_LOAD_FAILURE. If the module can not load the configuration file or other non-critical problem return AST_MODULE_LOAD_DECLINE. On success return AST_MODULE_LOAD_SUCCESS.
Definition at line 1143 of file res_pjsip_t38.c.
References ast_check_ipv6(), AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, ast_sockaddr_parse(), and unload_module().
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Datastore for attaching T.38 state information.
Definition at line 82 of file res_pjsip_t38.c.
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Definition at line 645 of file res_pjsip_t38.c.