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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2013, Digium, Inc.
*
* Joshua Colp <jcolp@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 "asterisk/res_pjsip.h"
#include "asterisk/res_pjsip_session.h"
#include "asterisk/module.h"
#include "asterisk/causes.h"
#include "asterisk/threadpool.h"
static void rfc3326_use_reason_header(struct ast_sip_session *session, struct pjsip_rx_data *rdata)
{
static const pj_str_t str_reason = { "Reason", 6 };
pjsip_generic_string_hdr *header;
char buf[20];
char *cause;
char *text;
int code;
header = pjsip_msg_find_hdr_by_name(rdata->msg_info.msg, &str_reason, NULL);
for (; header;
header = pjsip_msg_find_hdr_by_name(rdata->msg_info.msg, &str_reason, header->next)) {
ast_copy_pj_str(buf, &header->hvalue, sizeof(buf));
cause = ast_skip_blanks(buf);
if (strncasecmp(cause, "Q.850", 5) || !(cause = strstr(cause, "cause="))) {
continue;
}
/* If text is present get rid of it */
if ((text = strstr(cause, ";"))) {
*text = '\0';
}
if (sscanf(cause, "cause=%30d", &code) != 1) {
continue;
}
ast_channel_hangupcause_set(session->channel, code & 0x7f);
break;
}
}
static int rfc3326_incoming_request(struct ast_sip_session *session, struct pjsip_rx_data *rdata)
{
if ((pjsip_method_cmp(&rdata->msg_info.msg->line.req.method, &pjsip_bye_method) &&
pjsip_method_cmp(&rdata->msg_info.msg->line.req.method, &pjsip_cancel_method)) ||
!session->channel) {
return 0;
}
rfc3326_use_reason_header(session, rdata);
return 0;
}
static void rfc3326_incoming_response(struct ast_sip_session *session, struct pjsip_rx_data *rdata)
{
struct pjsip_status_line status = rdata->msg_info.msg->line.status;
if ((status.code < 300) || !session->channel) {
return;
}
rfc3326_use_reason_header(session, rdata);
}
static void rfc3326_add_reason_header(struct ast_sip_session *session, struct pjsip_tx_data *tdata)
{
char buf[20];
if (ast_channel_hangupcause(session->channel) == AST_CAUSE_ANSWERED_ELSEWHERE) {
ast_sip_add_header(tdata, "Reason", "SIP;cause=200;text=\"Call completed elsewhere\"");
}
snprintf(buf, sizeof(buf), "Q.850;cause=%i", ast_channel_hangupcause(session->channel) & 0x7f);
ast_sip_add_header(tdata, "Reason", buf);
}
static void rfc3326_outgoing_request(struct ast_sip_session *session, struct pjsip_tx_data *tdata)
{
if ((pjsip_method_cmp(&tdata->msg->line.req.method, &pjsip_bye_method)
&& pjsip_method_cmp(&tdata->msg->line.req.method, &pjsip_cancel_method))
|| !session->channel
/*
* The session->channel has been seen to go away on us between
* checks so we must also be running under the call's serializer
* thread.
*/
|| session->serializer != ast_threadpool_serializer_get_current()) {
return;
}
rfc3326_add_reason_header(session, tdata);
}
static void rfc3326_outgoing_response(struct ast_sip_session *session, struct pjsip_tx_data *tdata)
{
struct pjsip_status_line status = tdata->msg->line.status;
if (status.code < 300
|| !session->channel
|| session->serializer != ast_threadpool_serializer_get_current()) {
return;
}
rfc3326_add_reason_header(session, tdata);
}
static struct ast_sip_session_supplement rfc3326_supplement = {
.incoming_request = rfc3326_incoming_request,
.incoming_response = rfc3326_incoming_response,
.outgoing_request = rfc3326_outgoing_request,
.outgoing_response = rfc3326_outgoing_response,
};
static int load_module(void)
{
ast_sip_session_register_supplement(&rfc3326_supplement);
return AST_MODULE_LOAD_SUCCESS;
}
static int unload_module(void)
{
ast_sip_session_unregister_supplement(&rfc3326_supplement);
return 0;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "PJSIP RFC3326 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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