nict.c
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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"
#include "xixt.h"
int __osip_nict_init(osip_nict_t **nict, osip_t *osip, osip_message_t *request) {
osip_route_t *route;
int i;
OSIP_TRACE(osip_trace(__FILE__, __LINE__, OSIP_INFO2, NULL, "allocating NICT context\n"));
*nict = (osip_nict_t *) osip_malloc(sizeof(osip_nict_t));
if (*nict == NULL)
return OSIP_NOMEM;
memset(*nict, 0, sizeof(osip_nict_t));
/* for REQUEST retransmissions */
{
osip_via_t *via;
char *proto;
i = osip_message_get_via(request, 0, &via); /* get top via */
if (i < 0) {
osip_free(*nict);
*nict = NULL;
return i;
}
proto = via_get_protocol(via);
if (proto == NULL) {
osip_free(*nict);
*nict = NULL;
return OSIP_UNDEFINED_ERROR;
}
#ifdef USE_BLOCKINGSOCKET
if (osip_strcasecmp(proto, "TCP") != 0 && osip_strcasecmp(proto, "TLS") != 0 && osip_strcasecmp(proto, "SCTP") != 0) {
(*nict)->timer_e_length = DEFAULT_T1;
(*nict)->timer_k_length = DEFAULT_T4;
(*nict)->timer_e_start.tv_sec = -1;
(*nict)->timer_k_start.tv_sec = -1; /* not started */
} else { /* reliable protocol is used: */
(*nict)->timer_e_length = -1; /* E is not ACTIVE */
(*nict)->timer_k_length = 0; /* MUST do the transition immediatly */
(*nict)->timer_e_start.tv_sec = -1;
(*nict)->timer_k_start.tv_sec = -1; /* not started */
}
}
#else
if (osip_strcasecmp(proto, "TCP") != 0 && osip_strcasecmp(proto, "TLS") != 0 && osip_strcasecmp(proto, "SCTP") != 0) {
(*nict)->timer_e_length = DEFAULT_T1;
(*nict)->timer_k_length = DEFAULT_T4;
(*nict)->timer_e_start.tv_sec = -1;
(*nict)->timer_k_start.tv_sec = -1; /* not started */
} else { /* reliable protocol is used: */
(*nict)->timer_e_length = DEFAULT_T1;
(*nict)->timer_k_length = 0; /* MUST do the transition immediatly */
(*nict)->timer_e_start.tv_sec = -1;
(*nict)->timer_k_start.tv_sec = -1; /* not started */
}
}
#endif
/* for PROXY, the destination MUST be set by the application layer,
this one may not be correct. */
osip_message_get_route(request, 0, &route);
if (route != NULL && route->url != NULL) {
osip_uri_param_t *lr_param;
osip_uri_uparam_get_byname(route->url, "lr", &lr_param);
if (lr_param == NULL) {
/* using uncompliant proxy: destination is the request-uri */
route = NULL;
}
}
if (route != NULL && route->url != NULL) {
int port = 5060;
if (route->url->port != NULL)
port = osip_atoi(route->url->port);
osip_nict_set_destination((*nict), osip_strdup(route->url->host), port);
} else {
int port = 5060;
/* search for maddr parameter */
osip_uri_param_t *maddr_param = NULL;
osip_uri_param_t *obr_param = NULL;
osip_uri_param_t *obp_param = NULL;
port = 5060;
if (request->req_uri->port != NULL)
port = osip_atoi(request->req_uri->port);
/* if ob was used in Contact, then exosip adds "x-obr" and "x-obp", thus, when
processing request, the ip/port destination are re-used here */
osip_uri_uparam_get_byname(request->req_uri, "x-obr", &obr_param);
osip_uri_uparam_get_byname(request->req_uri, "x-obp", &obp_param);
osip_uri_uparam_get_byname(request->req_uri, "maddr", &maddr_param);
if (maddr_param != NULL && maddr_param->gvalue != NULL)
osip_nict_set_destination((*nict), osip_strdup(maddr_param->gvalue), port);
else if (obr_param != NULL && obr_param->gvalue != NULL && obp_param != NULL && obp_param->gvalue != NULL)
osip_nict_set_destination((*nict), osip_strdup(obr_param->gvalue), osip_atoi(obp_param->gvalue));
else
osip_nict_set_destination((*nict), osip_strdup(request->req_uri->host), port);
}
(*nict)->timer_f_length = 64 * DEFAULT_T1;
osip_gettimeofday(&(*nict)->timer_f_start, NULL);
add_gettimeofday(&(*nict)->timer_f_start, (*nict)->timer_f_length);
/* Oups! a Bug! */
/* (*nict)->port = 5060; */
return OSIP_SUCCESS;
}
int __osip_nict_free(osip_nict_t *nict) {
if (nict == NULL)
return OSIP_SUCCESS;
OSIP_TRACE(osip_trace(__FILE__, __LINE__, OSIP_INFO2, NULL, "free nict resource\n"));
osip_free(nict->destination);
osip_free(nict);
return OSIP_SUCCESS;
}
int osip_nict_set_destination(osip_nict_t *nict, char *destination, int port) {
if (nict == NULL)
return OSIP_BADPARAMETER;
if (nict->destination != NULL)
osip_free(nict->destination);
nict->destination = destination;
nict->port = port;
return OSIP_SUCCESS;
}
osip_event_t *__osip_nict_need_timer_e_event(osip_nict_t *nict, state_t state, int transactionid) {
return __osip_transaction_need_timer_x_event(nict, &nict->timer_e_start, state == NICT_PROCEEDING || state == NICT_TRYING, transactionid, TIMEOUT_E);
}
osip_event_t *__osip_nict_need_timer_f_event(osip_nict_t *nict, state_t state, int transactionid) {
return __osip_transaction_need_timer_x_event(nict, &nict->timer_f_start, state == NICT_PROCEEDING || state == NICT_TRYING, transactionid, TIMEOUT_F);
}
osip_event_t *__osip_nict_need_timer_k_event(osip_nict_t *nict, state_t state, int transactionid) {
return __osip_transaction_need_timer_x_event(nict, &nict->timer_k_start, state == NICT_COMPLETED, transactionid, TIMEOUT_K);
}