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ari/pjsip: Make it possible to control transfers through ARI

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Introduce a ChannelTransfer event and the ability to notify progress to
ARI. Implement emitting this event from the PJSIP channel instead of
handling the transfer in Asterisk when configured.

Introduce a dialplan function to the PJSIP channel to switch between the
"core" and "ari-only" behavior.

UserNote: Call transfers on the PJSIP channel can now be controlled by
ARI. This can be enabled by using the PJSIP_TRANSFER_HANDLING(ari-only)
dialplan function.

(cherry picked from commit 71eb8a262f)
This commit is contained in:
Holger Hans Peter Freyther
2024-06-15 16:01:58 +08:00
committed by Asterisk Development Team
parent 007e281313
commit 0e8bde6bde
18 changed files with 1462 additions and 6 deletions
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14
channels/chan_pjsip.c
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@@ -1851,6 +1851,8 @@ static int chan_pjsip_indicate(struct ast_channel *ast, int condition, const voi
break;
case AST_CONTROL_STREAM_TOPOLOGY_SOURCE_CHANGED:
break;
case AST_CONTROL_TRANSFER:
break;
case -1:
res = -1;
break;
@@ -3274,6 +3276,11 @@ static struct ast_custom_function session_refresh_function = {
.write = pjsip_acf_session_refresh_write,
};
static struct ast_custom_function transfer_handling_function = {
.name = "PJSIP_TRANSFER_HANDLING",
.write = pjsip_transfer_handling_write,
};
static char *app_pjsip_hangup = "PJSIPHangup";
/*!
@@ -3338,6 +3345,11 @@ static int load_module(void)
goto end;
}
if (ast_custom_function_register(&transfer_handling_function)) {
ast_log(LOG_WARNING, "Unable to register PJSIP_TRANSFER_HANDLING dialplan function\n");
goto end;
}
if (ast_register_application_xml(app_pjsip_hangup, pjsip_app_hangup)) {
ast_log(LOG_WARNING, "Unable to register PJSIPHangup dialplan application\n");
goto end;
@@ -3393,6 +3405,7 @@ end:
ast_custom_function_unregister(&chan_pjsip_parse_uri_function);
ast_custom_function_unregister(&chan_pjsip_parse_uri_from_function);
ast_custom_function_unregister(&session_refresh_function);
ast_custom_function_unregister(&transfer_handling_function);
ast_unregister_application(app_pjsip_hangup);
ast_manager_unregister(app_pjsip_hangup);
@@ -3426,6 +3439,7 @@ static int unload_module(void)
ast_custom_function_unregister(&chan_pjsip_parse_uri_function);
ast_custom_function_unregister(&chan_pjsip_parse_uri_from_function);
ast_custom_function_unregister(&session_refresh_function);
ast_custom_function_unregister(&transfer_handling_function);
ast_unregister_application(app_pjsip_hangup);
ast_manager_unregister(app_pjsip_hangup);