73ef4ff3
 Hu Chunming
提交三方库
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/*
The oSIP library implements the Session Initiation Protocol (SIP -rfc3261-)
Copyright (C) 2001-2020 Aymeric MOIZARD amoizard@antisip.com
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <osip2/internal.h>
#include <osip2/osip.h>
#include "fsm.h"
int __osip_ist_init(osip_ist_t **ist, osip_t *osip, osip_message_t *invite) {
int i;
OSIP_TRACE(osip_trace(__FILE__, __LINE__, OSIP_INFO2, NULL, "allocating IST context\n"));
*ist = (osip_ist_t *) osip_malloc(sizeof(osip_ist_t));
if (*ist == NULL)
return OSIP_NOMEM;
memset(*ist, 0, sizeof(osip_ist_t));
/* for INVITE retransmissions */
{
osip_via_t *via;
char *proto;
i = osip_message_get_via(invite, 0, &via); /* get top via */
if (i < 0) {
osip_free(*ist);
*ist = NULL;
return i;
}
proto = via_get_protocol(via);
if (proto == NULL) {
osip_free(*ist);
*ist = NULL;
return OSIP_UNDEFINED_ERROR;
}
if (osip_strcasecmp(proto, "TCP") != 0 && osip_strcasecmp(proto, "TLS") != 0 && osip_strcasecmp(proto, "SCTP") != 0) {
/* for other reliable protocol than TCP, the timer
must be desactived by the external application */
(*ist)->timer_g_length = DEFAULT_T1;
(*ist)->timer_i_length = DEFAULT_T4;
(*ist)->timer_g_start.tv_sec = -1; /* not started */
(*ist)->timer_i_start.tv_sec = -1; /* not started */
} else { /* reliable protocol is used: */
(*ist)->timer_g_length = -1; /* A is not ACTIVE */
(*ist)->timer_i_length = 0; /* MUST do the transition immediatly */
(*ist)->timer_g_start.tv_sec = -1; /* not started */
(*ist)->timer_i_start.tv_sec = -1; /* not started */
}
}
(*ist)->timer_h_length = 64 * DEFAULT_T1;
(*ist)->timer_h_start.tv_sec = -1; /* not started */
return OSIP_SUCCESS;
}
int __osip_ist_free(osip_ist_t *ist) {
if (ist == NULL)
return OSIP_SUCCESS;
OSIP_TRACE(osip_trace(__FILE__, __LINE__, OSIP_INFO2, NULL, "free ist resource\n"));
osip_free(ist);
return OSIP_SUCCESS;
}
osip_event_t *__osip_ist_need_timer_g_event(osip_ist_t *ist, state_t state, int transactionid) {
return __osip_transaction_need_timer_x_event(ist, &ist->timer_g_start, state == IST_COMPLETED, transactionid, TIMEOUT_G);
}
osip_event_t *__osip_ist_need_timer_h_event(osip_ist_t *ist, state_t state, int transactionid) {
return __osip_transaction_need_timer_x_event(ist, &ist->timer_h_start, state == IST_COMPLETED, transactionid, TIMEOUT_H);
}
osip_event_t *__osip_ist_need_timer_i_event(osip_ist_t *ist, state_t state, int transactionid) {
return __osip_transaction_need_timer_x_event(ist, &ist->timer_i_start, state == IST_CONFIRMED, transactionid, TIMEOUT_I);
}
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