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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2017, CFWare, LLC
*
* Corey Farrell <git@cfware.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.
*/
#include "asterisk.h"
#include <pjsip.h>
#include <pjsip_ua.h>
#include <pjlib.h>
#include "asterisk/res_pjsip.h"
#include "asterisk/res_pjsip_session.h"
#include "include/res_pjsip_private.h"
#include "asterisk/linkedlists.h"
#include "asterisk/lock.h"
#include "asterisk/module.h"
AST_RWLIST_HEAD_STATIC(session_supplements, ast_sip_session_supplement);
void internal_sip_session_register_supplement(struct ast_sip_session_supplement *supplement)
{
struct ast_sip_session_supplement *iter;
int inserted = 0;
SCOPED_LOCK(lock, &session_supplements, AST_RWLIST_WRLOCK, AST_RWLIST_UNLOCK);
if (!supplement->response_priority) {
supplement->response_priority = AST_SIP_SESSION_BEFORE_MEDIA;
}
AST_RWLIST_TRAVERSE_SAFE_BEGIN(&session_supplements, iter, next) {
if (iter->priority > supplement->priority) {
AST_RWLIST_INSERT_BEFORE_CURRENT(supplement, next);
inserted = 1;
break;
}
}
AST_RWLIST_TRAVERSE_SAFE_END;
if (!inserted) {
AST_RWLIST_INSERT_TAIL(&session_supplements, supplement, next);
}
}
int ast_sip_session_register_supplement(struct ast_sip_session_supplement *supplement)
{
internal_sip_session_register_supplement(supplement);
ast_module_ref(AST_MODULE_SELF);
return 0;
}
int internal_sip_session_unregister_supplement(struct ast_sip_session_supplement *supplement)
{
struct ast_sip_session_supplement *iter;
int res = -1;
SCOPED_LOCK(lock, &session_supplements, AST_RWLIST_WRLOCK, AST_RWLIST_UNLOCK);
AST_RWLIST_TRAVERSE_SAFE_BEGIN(&session_supplements, iter, next) {
if (supplement == iter) {
AST_RWLIST_REMOVE_CURRENT(next);
res = 0;
break;
}
}
AST_RWLIST_TRAVERSE_SAFE_END;
return res;
}
void ast_sip_session_unregister_supplement(struct ast_sip_session_supplement *supplement)
{
if (!internal_sip_session_unregister_supplement(supplement)) {
ast_module_unref(AST_MODULE_SELF);
}
}
static struct ast_sip_session_supplement *supplement_dup(const struct ast_sip_session_supplement *src)
{
struct ast_sip_session_supplement *dst = ast_calloc(1, sizeof(*dst));
if (!dst) {
return NULL;
}
/* Will need to revisit if shallow copy becomes an issue */
*dst = *src;
return dst;
}
int ast_sip_session_add_supplements(struct ast_sip_session *session)
{
struct ast_sip_session_supplement *iter;
SCOPED_LOCK(lock, &session_supplements, AST_RWLIST_RDLOCK, AST_RWLIST_UNLOCK);
AST_RWLIST_TRAVERSE(&session_supplements, iter, next) {
struct ast_sip_session_supplement *copy = supplement_dup(iter);
if (!copy) {
return -1;
}
AST_LIST_INSERT_TAIL(&session->supplements, copy, next);
}
return 0;
}
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