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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2016, Digium, Inc.
*
* Bradley Latus <brad.latus@gmail.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 "asterisk/res_pjsip.h"
#include "asterisk/res_pjsip_session.h"
#include "asterisk/module.h"
static void send_response(struct ast_sip_session *session,
struct pjsip_rx_data *rdata, int code)
{
pjsip_tx_data *tdata;
pjsip_dialog *dlg = session->inv_session->dlg;
if (pjsip_dlg_create_response(dlg, rdata, code, NULL, &tdata) == PJ_SUCCESS) {
struct pjsip_transaction *tsx = pjsip_rdata_get_tsx(rdata);
pjsip_dlg_send_response(dlg, tsx, tdata);
}
}
static int empty_info_incoming_request(struct ast_sip_session *session,
struct pjsip_rx_data *rdata)
{
if (!rdata->msg_info.ctype) {
/* Need to return 200 OK on empty body */
/* Some SBCs use empty INFO as a KEEPALIVE */
send_response(session, rdata, 200);
return 1;
}
/* Let another module respond */
return 0;
}
static struct ast_sip_session_supplement empty_info_supplement = {
.method = "INFO",
.priority = AST_SIP_SUPPLEMENT_PRIORITY_LAST,
.incoming_request = empty_info_incoming_request,
};
static int load_module(void)
{
ast_sip_session_register_supplement(&empty_info_supplement);
return AST_MODULE_LOAD_SUCCESS;
}
static int unload_module(void)
{
ast_sip_session_unregister_supplement(&empty_info_supplement);
return 0;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "PJSIP Empty INFO Support",
.support_level = AST_MODULE_SUPPORT_CORE,
.load = load_module,
.unload = unload_module,
.load_pri = AST_MODPRI_APP_DEPEND,
.requires = "res_pjsip,res_pjsip_session",
);
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