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channels/chan_pjsip: Add PJSIP_SEND_SESSION_REFRESH

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This patch adds a new PJSIP specific dialplan function,
PJSIP_SEND_SESSION_REFRESH. When invoked on a PJSIP channel, the media
session will be refreshed via either an UPDATE or re-INVITE request.
When used in conjunction with the PJSIP_MEDIA_OFFER dialplan function,
the formats in use on a PJSIP channel can be re-negotiated and changed
dynamically after call setup.

ASTERISK-26277 #close

Change-Id: Ib98fe09ba889aafe26d58d32f0fd1323f8fd9b1b
(cherry picked from commit eec60dd773)
This commit is contained in:
Matt Jordan
2016-08-07 09:58:59 -05:00
parent d78fe8fed0
commit c315460abb
4 changed files with 170 additions and 21 deletions
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12
channels/chan_pjsip.c
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@@ -2433,6 +2433,11 @@ static struct ast_custom_function media_offer_function = {
.write = pjsip_acf_media_offer_write
};
static struct ast_custom_function session_refresh_function = {
.name = "PJSIP_SEND_SESSION_REFRESH",
.write = pjsip_acf_session_refresh_write,
};
/*!
* \brief Load the module
*
@@ -2472,6 +2477,11 @@ static int load_module(void)
goto end;
}
if (ast_custom_function_register(&session_refresh_function)) {
ast_log(LOG_WARNING, "Unable to register PJSIP_SEND_SESSION_REFRESH dialplan function\n");
goto end;
}
if (ast_sip_session_register_supplement(&chan_pjsip_supplement)) {
ast_log(LOG_ERROR, "Unable to register PJSIP supplement\n");
goto end;
@@ -2528,6 +2538,7 @@ end:
pjsip_uids_onhold = NULL;
ast_custom_function_unregister(&media_offer_function);
ast_custom_function_unregister(&chan_pjsip_dial_contacts_function);
ast_custom_function_unregister(&session_refresh_function);
ast_channel_unregister(&chan_pjsip_tech);
ast_rtp_glue_unregister(&chan_pjsip_rtp_glue);
@@ -2549,6 +2560,7 @@ static int unload_module(void)
ast_custom_function_unregister(&media_offer_function);
ast_custom_function_unregister(&chan_pjsip_dial_contacts_function);
ast_custom_function_unregister(&session_refresh_function);
ast_channel_unregister(&chan_pjsip_tech);
ao2_ref(chan_pjsip_tech.capabilities, -1);