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/*
The oSIP library implements the Session Initiation Protocol (SIP -rfc3261-)
Copyright (C) 2001,2002,2003 Aymeric MOIZARD jack@atosc.org
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 <osip/port.h>
#include <osip/osip.h>
#include "fsm.h"
statemachine_t *nict_fsm;
statemachine_t *
nict_get_fsm ()
{
return nict_fsm;
}
void
nict_unload_fsm ()
{
transition_t *transition;
statemachine_t *statemachine = nict_get_fsm ();
while (!list_eol (statemachine->transitions, 0))
{
transition = (transition_t *) list_get (statemachine->transitions, 0);
list_remove (statemachine->transitions, 0);
sfree (transition);
}
sfree (statemachine->transitions);
sfree (statemachine);
}
void
nict_load_fsm ()
{
transition_t *transition;
nict_fsm = (statemachine_t *) smalloc (sizeof (statemachine_t));
nict_fsm->transitions = (list_t *) smalloc (sizeof (list_t));
list_init (nict_fsm->transitions);
/* to avoid race conditions between timers and first request */
transition = (transition_t *) smalloc (sizeof (transition_t));
transition->state = NICT_PRE_TRYING;
transition->type = SND_REQUEST;
transition->method = (void (*)(void *, void *)) &nict_snd_request;
list_add (nict_fsm->transitions, transition, -1);
/*
transition = (transition_t *) smalloc(sizeof(transition_t));
transition->state = NICT_TRYING;
transition->type = SND_REQUEST;
transition->method = (void(*)(void *,void *))&nict_snd_request;
list_add(nict_fsm->transitions,transition,-1);
*/
transition = (transition_t *) smalloc (sizeof (transition_t));
transition->state = NICT_TRYING;
transition->type = TIMEOUT_F;
transition->method = (void (*)(void *, void *)) &nict_timeout_f_event;
list_add (nict_fsm->transitions, transition, -1);
transition = (transition_t *) smalloc (sizeof (transition_t));
transition->state = NICT_TRYING;
transition->type = TIMEOUT_E;
transition->method = (void (*)(void *, void *)) &nict_timeout_e_event;
list_add (nict_fsm->transitions, transition, -1);
transition = (transition_t *) smalloc (sizeof (transition_t));
transition->state = NICT_TRYING;
transition->type = RCV_STATUS_1XX;
transition->method = (void (*)(void *, void *)) &nict_rcv_1xx;
list_add (nict_fsm->transitions, transition, -1);
transition = (transition_t *) smalloc (sizeof (transition_t));
transition->state = NICT_TRYING;
transition->type = RCV_STATUS_2XX;
transition->method = (void (*)(void *, void *)) &nict_rcv_23456xx;
list_add (nict_fsm->transitions, transition, -1);
transition = (transition_t *) smalloc (sizeof (transition_t));
transition->state = NICT_TRYING;
transition->type = RCV_STATUS_3456XX;
transition->method = (void (*)(void *, void *)) &nict_rcv_23456xx;
list_add (nict_fsm->transitions, transition, -1);
transition = (transition_t *) smalloc (sizeof (transition_t));
transition->state = NICT_PROCEEDING;
transition->type = TIMEOUT_F;
transition->method = (void (*)(void *, void *)) &nict_timeout_f_event;
list_add (nict_fsm->transitions, transition, -1);
transition = (transition_t *) smalloc (sizeof (transition_t));
transition->state = NICT_PROCEEDING;
transition->type = TIMEOUT_E;
transition->method = (void (*)(void *, void *)) &nict_timeout_e_event;
list_add (nict_fsm->transitions, transition, -1);
transition = (transition_t *) smalloc (sizeof (transition_t));
transition->state = NICT_PROCEEDING;
transition->type = RCV_STATUS_1XX;
transition->method = (void (*)(void *, void *)) &nict_rcv_1xx;
list_add (nict_fsm->transitions, transition, -1);
transition = (transition_t *) smalloc (sizeof (transition_t));
transition->state = NICT_PROCEEDING;
transition->type = RCV_STATUS_2XX;
transition->method = (void (*)(void *, void *)) &nict_rcv_23456xx;
list_add (nict_fsm->transitions, transition, -1);
transition = (transition_t *) smalloc (sizeof (transition_t));
transition->state = NICT_PROCEEDING;
transition->type = RCV_STATUS_3456XX;
transition->method = (void (*)(void *, void *)) &nict_rcv_23456xx;
list_add (nict_fsm->transitions, transition, -1);
transition = (transition_t *) smalloc (sizeof (transition_t));
transition->state = NICT_COMPLETED;
transition->type = TIMEOUT_K;
transition->method = (void (*)(void *, void *)) &nict_timeout_k_event;
list_add (nict_fsm->transitions, transition, -1);
/* these ccan be used to announce retransmission of 2xx and 3456xx
For the state machine, it is completely useless...
transition = (transition_t *) smalloc(sizeof(transition_t));
transition->state = NICT_COMPLETED;
transition->type = RCV_STATUS_2XX;
transition->method = (void(*)(void *,void *))&nict_rcv_23456xx2;
list_add(nict_fsm->transitions,transition,-1);
transition = (transition_t *) smalloc(sizeof(transition_t));
transition->state = NICT_COMPLETED;
transition->type = RCV_STATUS_3456XX;
transition->method = (void(*)(void *,void *))&nict_rcv_23456xx2;
list_add(nict_fsm->transitions,transition,-1);
*/
}
void
nict_snd_request (transaction_t * nict, sipevent_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))
{
if (osip->cb_nict_register_sent != NULL)
osip->cb_nict_register_sent (nict, nict->orig_request);
}
else if (MSG_IS_BYE (evt->sip))
{
if (osip->cb_nict_bye_sent != NULL)
osip->cb_nict_bye_sent (nict, nict->orig_request);
}
else if (MSG_IS_OPTIONS (evt->sip))
{
if (osip->cb_nict_options_sent != NULL)
osip->cb_nict_options_sent (nict, nict->orig_request);
}
else if (MSG_IS_INFO (evt->sip))
{
if (osip->cb_nict_info_sent != NULL)
osip->cb_nict_info_sent (nict, nict->orig_request);
}
else if (MSG_IS_CANCEL (evt->sip))
{
if (osip->cb_nict_cancel_sent != NULL)
osip->cb_nict_cancel_sent (nict, nict->orig_request);
}
else if (MSG_IS_NOTIFY (evt->sip))
{
if (osip->cb_nict_notify_sent != NULL)
osip->cb_nict_notify_sent (nict, nict->orig_request);
}
else if (MSG_IS_SUBSCRIBE (evt->sip))
{
if (osip->cb_nict_subscribe_sent != NULL)
osip->cb_nict_subscribe_sent (nict, nict->orig_request);
}
else
{
if (osip->cb_nict_unknown_sent != NULL)
osip->cb_nict_unknown_sent (nict, nict->orig_request);
}
transaction_set_state (nict, NICT_TRYING);
}
else
{
osip->cb_nict_transport_error (nict, i);
transaction_set_state (nict, NICT_TERMINATED);
osip->cb_nict_kill_transaction (nict);
/* TODO: MUST BE DELETED NOW */
}
}
void
nict_timeout_e_event (transaction_t * nict, sipevent_t * evt)
{
osip_t *osip = (osip_t *) nict->config;
time_t now = time (NULL);
int i;
/* reset timer */
if (nict->state == NICT_TRYING)
{
nict->nict_context->timer_e_length =
nict->nict_context->timer_e_length * 2;
if (nict->nict_context->timer_e_length > 4000)
nict->nict_context->timer_e_length = 4000;
}
else /* in PROCEEDING STATE, TIMER is always 4000 */
nict->nict_context->timer_e_length = 4000;
nict->nict_context->timer_e_start = now;
/* 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)
{
osip->cb_nict_transport_error (nict, i);
transaction_set_state (nict, NICT_TERMINATED);
osip->cb_nict_kill_transaction (nict);
/* TODO: MUST BE DELETED NOW */
return;
}
if (osip->cb_nict_request_sent2 != NULL)
osip->cb_nict_request_sent2 (nict, nict->orig_request);
}
void
nict_timeout_f_event (transaction_t * nict, sipevent_t * evt)
{
osip_t *osip = (osip_t *) nict->config;
nict->nict_context->timer_f_length = -1;
nict->nict_context->timer_f_start = -1;
transaction_set_state (nict, NICT_TERMINATED);
osip->cb_nict_kill_transaction (nict);
}
void
nict_timeout_k_event (transaction_t * nict, sipevent_t * evt)
{
osip_t *osip = (osip_t *) nict->config;
nict->nict_context->timer_k_length = -1;
nict->nict_context->timer_k_start = -1;
transaction_set_state (nict, NICT_TERMINATED);
osip->cb_nict_kill_transaction (nict);
}
void
nict_rcv_1xx (transaction_t * nict, sipevent_t * evt)
{
osip_t *osip = (osip_t *) nict->config;
/* leave this answer to the core application */
if (nict->last_response != NULL)
{
msg_free (nict->last_response);
sfree (nict->last_response);
}
nict->last_response = evt->sip;
if (osip->cb_nict_1xx_received != NULL)
osip->cb_nict_1xx_received (nict, evt->sip);
transaction_set_state (nict, NICT_PROCEEDING);
}
void
nict_rcv_23456xx (transaction_t * nict, sipevent_t * evt)
{
osip_t *osip = (osip_t *) nict->config;
/* leave this answer to the core application */
if (nict->last_response != NULL)
{
msg_free (nict->last_response);
sfree (nict->last_response);
}
nict->last_response = evt->sip;
if (EVT_IS_RCV_STATUS_2XX (evt))
osip->cb_nict_2xx_received (nict, nict->last_response);
else
{
if (MSG_IS_STATUS_3XX (nict->last_response))
osip->cb_nict_3xx_received (nict, nict->last_response);
else if (MSG_IS_STATUS_4XX (nict->last_response))
osip->cb_nict_4xx_received (nict, nict->last_response);
else if (MSG_IS_STATUS_5XX (nict->last_response))
osip->cb_nict_5xx_received (nict, nict->last_response);
else
osip->cb_nict_6xx_received (nict, nict->last_response);
}
if (nict->state != NICT_COMPLETED) /* reset timer K */
nict->nict_context->timer_k_start = time (NULL);
transaction_set_state (nict, NICT_COMPLETED);
}
/* See Rq in the state machine definition (above)
void
nict_rcv_23456xx2(transaction_t *nict, sipevent_t *evt)
{
osip_t *osip = (osip_t*)nict->config;
if (nict->last_response!=NULL)
{
msg_free(nict->last_response);
sfree(nict->last_response);
}
nict->last_response = evt->sip;
if (EVT_IS_RCV_STATUS_2XX(evt))
{
if (osip->cb_nict_2xx_received2!=NULL)
osip->cb_nict_2xx_received2(nict, evt->sip);
}
else
{
if (osip->cb_nict_3456xx_received2!=NULL)
osip->cb_nict_3456xx_received2(nict, evt->sip);
}
}
*/
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