nict_fsm.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"
transition_t nict_transition[12] = {
{NICT_PRE_TRYING, SND_REQUEST, (void (*)(void *, void *)) & nict_snd_request, &nict_transition[1], NULL}, {NICT_TRYING, TIMEOUT_F, (void (*)(void *, void *)) & osip_nict_timeout_f_event, &nict_transition[2], NULL},
{NICT_TRYING, TIMEOUT_E, (void (*)(void *, void *)) & osip_nict_timeout_e_event, &nict_transition[3], NULL}, {NICT_TRYING, RCV_STATUS_1XX, (void (*)(void *, void *)) & nict_rcv_1xx, &nict_transition[4], NULL},
{NICT_TRYING, RCV_STATUS_2XX, (void (*)(void *, void *)) & nict_rcv_23456xx, &nict_transition[5], NULL}, {NICT_TRYING, RCV_STATUS_3456XX, (void (*)(void *, void *)) & nict_rcv_23456xx, &nict_transition[6], NULL},
{NICT_PROCEEDING, TIMEOUT_F, (void (*)(void *, void *)) & osip_nict_timeout_f_event, &nict_transition[7], NULL}, {NICT_PROCEEDING, TIMEOUT_E, (void (*)(void *, void *)) & osip_nict_timeout_e_event, &nict_transition[8], NULL},
{NICT_PROCEEDING, RCV_STATUS_1XX, (void (*)(void *, void *)) & nict_rcv_1xx, &nict_transition[9], NULL}, {NICT_PROCEEDING, RCV_STATUS_2XX, (void (*)(void *, void *)) & nict_rcv_23456xx, &nict_transition[10], NULL},
{NICT_PROCEEDING, RCV_STATUS_3456XX, (void (*)(void *, void *)) & nict_rcv_23456xx, &nict_transition[11], NULL}, {NICT_COMPLETED, TIMEOUT_K, (void (*)(void *, void *)) & osip_nict_timeout_k_event, NULL, NULL}};
osip_statemachine_t nict_fsm = {nict_transition};
static void nict_handle_transport_error(osip_transaction_t *nict, int err) {
__osip_transport_error_callback(OSIP_NICT_TRANSPORT_ERROR, nict, err);
__osip_transaction_set_state(nict, NICT_TERMINATED);
__osip_kill_transaction_callback(OSIP_NICT_KILL_TRANSACTION, nict);
/* TODO: MUST BE DELETED NOW */
}
void nict_snd_request(osip_transaction_t *nict, osip_event_t *evt) {
int i;
osip_t *osip = (osip_t *) nict->config;
/* Here we have ict->orig_request == NULL */
nict->orig_request = evt->sip;
i = osip->cb_send_message(nict, evt->sip, nict->nict_context->destination, nict->nict_context->port, nict->out_socket);
if (i >= 0) {
/* invoke the right callback! */
if (MSG_IS_REGISTER(evt->sip))
__osip_message_callback(OSIP_NICT_REGISTER_SENT, nict, nict->orig_request);
else if (MSG_IS_BYE(evt->sip))
__osip_message_callback(OSIP_NICT_BYE_SENT, nict, nict->orig_request);
else if (MSG_IS_OPTIONS(evt->sip))
__osip_message_callback(OSIP_NICT_OPTIONS_SENT, nict, nict->orig_request);
else if (MSG_IS_INFO(evt->sip))
__osip_message_callback(OSIP_NICT_INFO_SENT, nict, nict->orig_request);
else if (MSG_IS_CANCEL(evt->sip))
__osip_message_callback(OSIP_NICT_CANCEL_SENT, nict, nict->orig_request);
else if (MSG_IS_NOTIFY(evt->sip))
__osip_message_callback(OSIP_NICT_NOTIFY_SENT, nict, nict->orig_request);
else if (MSG_IS_SUBSCRIBE(evt->sip))
__osip_message_callback(OSIP_NICT_SUBSCRIBE_SENT, nict, nict->orig_request);
else
__osip_message_callback(OSIP_NICT_UNKNOWN_REQUEST_SENT, nict, nict->orig_request);
#ifndef USE_BLOCKINGSOCKET
/*
stop timer E in reliable transport - non blocking socket:
the message was just sent
*/
{
osip_via_t *via;
char *proto;
int k;
k = osip_message_get_via(nict->orig_request, 0, &via); /* get top via */
if (k < 0) {
nict_handle_transport_error(nict, -1);
return;
}
proto = via_get_protocol(via);
if (proto == NULL) {
nict_handle_transport_error(nict, -1);
return;
}
if (i == 0) { /* but message was really sent */
if (osip_strcasecmp(proto, "TCP") != 0 && osip_strcasecmp(proto, "TLS") != 0 && osip_strcasecmp(proto, "SCTP") != 0) {
} else { /* reliable protocol is used: */
nict->nict_context->timer_e_length = -1; /* E is not ACTIVE */
nict->nict_context->timer_e_start.tv_sec = -1;
}
} else {
if (osip_strcasecmp(proto, "TCP") != 0 && osip_strcasecmp(proto, "TLS") != 0 && osip_strcasecmp(proto, "SCTP") != 0) {
} else { /* reliable protocol is used: */
nict->nict_context->timer_e_length = DEFAULT_T1_TCP_PROGRESS;
}
}
}
#endif
if (nict->nict_context->timer_e_length > 0) {
osip_gettimeofday(&nict->nict_context->timer_e_start, NULL);
add_gettimeofday(&nict->nict_context->timer_e_start, nict->nict_context->timer_e_length);
}
__osip_transaction_set_state(nict, NICT_TRYING);
} else {
nict_handle_transport_error(nict, i);
}
}
void osip_nict_timeout_e_event(osip_transaction_t *nict, osip_event_t *evt) {
osip_t *osip = (osip_t *) nict->config;
int i;
/* reset timer */
if (nict->state == NICT_TRYING) {
struct timeval now;
struct timeval duration;
long elapsed;
osip_gettimeofday(&now, NULL);
osip_timersub(&now, &nict->created_time, &duration);
elapsed = duration.tv_sec * 1000 + duration.tv_usec / 1000;
if (elapsed < DEFAULT_T1)
nict->nict_context->timer_e_length = DEFAULT_T1;
else if (elapsed < 2 * DEFAULT_T1)
nict->nict_context->timer_e_length = 2 * DEFAULT_T1;
else if (elapsed < 4 * DEFAULT_T1)
nict->nict_context->timer_e_length = 4 * DEFAULT_T1;
else
nict->nict_context->timer_e_length = nict->nict_context->timer_e_length * 2;
if (nict->nict_context->timer_e_length > DEFAULT_T2)
nict->nict_context->timer_e_length = DEFAULT_T2;
} else /* in PROCEEDING STATE, TIMER is always DEFAULT_T2 */
nict->nict_context->timer_e_length = DEFAULT_T2;
osip_gettimeofday(&nict->nict_context->timer_e_start, NULL);
add_gettimeofday(&nict->nict_context->timer_e_start, nict->nict_context->timer_e_length);
/* retransmit REQUEST */
i = osip->cb_send_message(nict, nict->orig_request, nict->nict_context->destination, nict->nict_context->port, nict->out_socket);
if (i < 0) {
nict_handle_transport_error(nict, i);
return;
}
#ifndef USE_BLOCKINGSOCKET
/*
stop timer E in reliable transport - non blocking socket:
the message was just sent
*/
if (i == 0) { /* but message was really sent */
osip_via_t *via;
char *proto;
i = osip_message_get_via(nict->orig_request, 0, &via); /* get top via */
if (i < 0) {
nict_handle_transport_error(nict, -1);
return;
}
proto = via_get_protocol(via);
if (proto == NULL) {
nict_handle_transport_error(nict, -1);
return;
}
if (osip_strcasecmp(proto, "TCP") != 0 && osip_strcasecmp(proto, "TLS") != 0 && osip_strcasecmp(proto, "SCTP") != 0) {
} else { /* reliable protocol is used: */
nict->nict_context->timer_e_length = -1; /* E is not ACTIVE */
nict->nict_context->timer_e_start.tv_sec = -1;
}
}
#endif
if (i == 0) /* but message was really sent */
__osip_message_callback(OSIP_NICT_REQUEST_SENT_AGAIN, nict, nict->orig_request);
}
void osip_nict_timeout_f_event(osip_transaction_t *nict, osip_event_t *evt) {
nict->nict_context->timer_f_length = -1;
nict->nict_context->timer_f_start.tv_sec = -1;
if (nict->out_socket == -999) {
nict_handle_transport_error(nict, -1);
} else {
__osip_message_callback(OSIP_NICT_STATUS_TIMEOUT, nict, evt->sip);
__osip_transaction_set_state(nict, NICT_TERMINATED);
__osip_kill_transaction_callback(OSIP_NICT_KILL_TRANSACTION, nict);
}
}
void osip_nict_timeout_k_event(osip_transaction_t *nict, osip_event_t *evt) {
nict->nict_context->timer_k_length = -1;
nict->nict_context->timer_k_start.tv_sec = -1;
__osip_transaction_set_state(nict, NICT_TERMINATED);
__osip_kill_transaction_callback(OSIP_NICT_KILL_TRANSACTION, nict);
}
void nict_rcv_1xx(osip_transaction_t *nict, osip_event_t *evt) {
/* leave this answer to the core application */
if (nict->last_response != NULL) {
osip_message_free(nict->last_response);
}
nict->last_response = evt->sip;
/* for unreliable transport increase the retransmission timeout */
if (nict->nict_context->timer_e_length > 0) {
nict->nict_context->timer_e_length = DEFAULT_T2;
osip_gettimeofday(&nict->nict_context->timer_e_start, NULL);
add_gettimeofday(&nict->nict_context->timer_e_start, nict->nict_context->timer_e_length);
}
__osip_message_callback(OSIP_NICT_STATUS_1XX_RECEIVED, nict, evt->sip);
__osip_transaction_set_state(nict, NICT_PROCEEDING);
}
void nict_rcv_23456xx(osip_transaction_t *nict, osip_event_t *evt) {
/* leave this answer to the core application */
if (nict->last_response != NULL) {
osip_message_free(nict->last_response);
}
nict->last_response = evt->sip;
if (EVT_IS_RCV_STATUS_2XX(evt))
__osip_message_callback(OSIP_NICT_STATUS_2XX_RECEIVED, nict, nict->last_response);
else if (MSG_IS_STATUS_3XX(nict->last_response))
__osip_message_callback(OSIP_NICT_STATUS_3XX_RECEIVED, nict, nict->last_response);
else if (MSG_IS_STATUS_4XX(nict->last_response))
__osip_message_callback(OSIP_NICT_STATUS_4XX_RECEIVED, nict, nict->last_response);
else if (MSG_IS_STATUS_5XX(nict->last_response))
__osip_message_callback(OSIP_NICT_STATUS_5XX_RECEIVED, nict, nict->last_response);
else
__osip_message_callback(OSIP_NICT_STATUS_6XX_RECEIVED, nict, nict->last_response);
if (nict->state != NICT_COMPLETED) { /* reset timer K */
osip_gettimeofday(&nict->nict_context->timer_k_start, NULL);
add_gettimeofday(&nict->nict_context->timer_k_start, nict->nict_context->timer_k_length);
}
__osip_transaction_set_state(nict, NICT_COMPLETED);
}