/*---------------------------------------------------------------------------*
* handle setup response message from userland
*---------------------------------------------------------------------------*/
void
n_connect_response(struct call_desc *cd, int response, int cause)
{
struct isdn_l3_driver *d = cd->l3drv;
int chstate;
T400_stop(cd);
cd->response = response;
cd->cause_out = cause;
switch(response)
{
case SETUP_RESP_ACCEPT:
next_l3state(cd, EV_SETACRS);
chstate = BCH_ST_USED;
break;
case SETUP_RESP_REJECT:
next_l3state(cd, EV_SETRJRS);
chstate = BCH_ST_FREE;
break;
case SETUP_RESP_DNTCRE:
next_l3state(cd, EV_SETDCRS);
chstate = BCH_ST_FREE;
break;
default: /* failsafe */
next_l3state(cd, EV_SETDCRS);
chstate = BCH_ST_FREE;
NDBGL3(L3_ERR, "unknown response, doing SETUP_RESP_DNTCRE");
break;
}
if((cd->channelid >= 0) && (cd->channelid < d->nbch))
{
d->bch_state[cd->channelid] = chstate;
/*
* XXX: don't call l2 function for active cards
*/
if (d->l3driver->N_DOWNLOAD == NULL)
i4b_l2_channel_set_state(cd->l3drv,
cd->channelid, chstate);
update_controller_leds(d);
}
else
{
NDBGL3(L3_MSG, "Warning, invalid channelid %d, response = %d\n", cd->channelid, response);
}
}
/*---------------------------------------------------------------------------*
* L3 FSM state U12 event RELEASE from L2
*---------------------------------------------------------------------------*/
static void F_12J(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_12J executing");
i4b_l3_tx_release_complete(cd, 0);
i4b_l4_disconnect_ind(cd);
freecd_by_cd(cd);
}
/*---------------------------------------------------------------------------*
* L3 FSM state U19 event RELEASE COMPLETE from L2
*---------------------------------------------------------------------------*/
static void F_19K(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_19K executing");
T308_stop(cd);
i4b_l4_disconnect_ind(cd);
freecd_by_cd(cd);
}
/*---------------------------------------------------------------------------*
* L3 FSM state U3 event CONNECT from L2
*---------------------------------------------------------------------------*/
static void F_03O(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_03O executing");
T310_stop(cd);
i4b_l3_tx_connect_ack(cd); /* CONNECT ACK to network */
i4b_l4_connect_active_ind(cd);
}
/*---------------------------------------------------------------------------*
* L3 FSM some states event RELEASE COMPLETE from L2
*---------------------------------------------------------------------------*/
static void F_RELCP(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_RELCP executing");
i4b_l3_stop_all_timers(cd);
i4b_l4_disconnect_ind(cd);
freecd_by_cd(cd);
}
/*---------------------------------------------------------------------------*
* L3 FSM state U1 event CONNECT from L2 (XXX !)
*---------------------------------------------------------------------------*/
static void F_01O(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_01O executing");
T303_stop(cd);
i4b_l3_tx_connect_ack(cd);
i4b_l4_connect_active_ind(cd);
}
/*---------------------------------------------------------------------------*
* L3 FSM state U1 event CALL PROCEEDING from L2
*---------------------------------------------------------------------------*/
static void F_01M(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_01M executing");
T303_stop(cd);
T310_start(cd);
i4b_l4_proceeding_ind(cd);
}
/*---------------------------------------------------------------------------*
* L3 FSM state U1 event RELEASE COMPLETE from L2
*---------------------------------------------------------------------------*/
static void F_01K(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_01K executing");
T303_stop(cd);
i4b_l4_disconnect_ind(cd); /* tell l4 we were rejected */
freecd_by_cd(cd);
}
/*---------------------------------------------------------------------------*
* L3 FSM state U12 event release req from L4
*---------------------------------------------------------------------------*/
static void F_12C(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_12C executing");
i4b_l3_tx_release(cd, 1);
cd->T308_first_to = 1;
T308_start(cd);
}
/*---------------------------------------------------------------------------*
* L3 FSM state U3 event PROGESS IND from L2
*---------------------------------------------------------------------------*/
static void F_03P(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_03P executing");
T310_stop(cd);
#ifdef NOTDEF
i4b_l4_progress_ind(cd);
#endif
}
/*---------------------------------------------------------------------------*
* L3 FSM relevant states event DL ESTABLISH IND from L2
*---------------------------------------------------------------------------*/
static void F_DLEI(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_DLEI executing");
/* XXX */
/* remain in current state */
}
/*---------------------------------------------------------------------------*
* L3 FSM state U1 event disconnect req from L4
*---------------------------------------------------------------------------*/
static void F_01B(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_01B executing");
/* cause from L4 */
i4b_l3_tx_disconnect(cd);
T303_stop(cd);
T305_start(cd);
}
/*---------------------------------------------------------------------------*
* L3 FSM state U8 event T313 timeout
*---------------------------------------------------------------------------*/
static void F_08Z(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_08Z executing");
cd->cause_out = 102; /* recovery on timer expiry */
i4b_l3_tx_disconnect(cd);
T305_start(cd);
i4b_l4_disconnect_ind(cd);
}
/*---------------------------------------------------------------------------*
* L3 FSM state U3 event release req from L4
*---------------------------------------------------------------------------*/
static void F_03C(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_03C executing");
T310_stop(cd);
cd->cause_out = 6;
i4b_l3_tx_release(cd, 1); /* 0 = don't send cause */
cd->T308_first_to = 1;
T308_start(cd);
}
/*---------------------------------------------------------------------------*
* L3 FSM state U10 event DL RELEASE IND from L2
*---------------------------------------------------------------------------*/
static void F_DLRIA(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_DLRIA executing");
if(cd->T309 == TIMER_IDLE)
T309_start(cd);
DL_Est_Req(ctrl_desc[cd->controller].unit);
}
/*---------------------------------------------------------------------------*
* timer T303 start
*---------------------------------------------------------------------------*/
void
T303_start(call_desc_t *cd)
{
if (cd->T303 == TIMER_ACTIVE)
return;
NDBGL3(L3_T_MSG, "cr = %d", cd->cr);
cd->T303 = TIMER_ACTIVE;
START_TIMER(cd->T303_callout, T303_timeout, cd, T303VAL);
}
/*---------------------------------------------------------------------------*
* timer T303 start
*---------------------------------------------------------------------------*/
void
T303_start(call_desc_t *cd)
{
if (cd->T303 == TIMER_ACTIVE)
return;
NDBGL3(L3_T_MSG, "cr = %d", cd->cr);
cd->T303 = TIMER_ACTIVE;
callout_reset(&cd->T303_timeout, T303VAL, (void *)T303_timeout, cd);
}
/*---------------------------------------------------------------------------*
* L3 FSM state U0 event STATUS from L2
*---------------------------------------------------------------------------*/
static void F_00I(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_00I executing");
if(cd->call_state != 0)
{
cd->cause_out = 101;
i4b_l3_tx_release_complete(cd, 1); /* 1 = send cause */
}
cd->Q931state = ST_U0;
}
/*---------------------------------------------------------------------------*
* L3 FSM any state event T309 timeout
*---------------------------------------------------------------------------*/
static void F_309TO(call_desc_t *cd)
{
NDBGL3(L3_F_ERR, "FSM function F_309TO executing");
/* XXX */
#ifdef NOTDEF
i4b_l4_dl_fail_ind(cd);
#endif
freecd_by_cd(cd);
}
/*---------------------------------------------------------------------------*
* timer T303 stop
*---------------------------------------------------------------------------*/
void
T303_stop(call_desc_t *cd)
{
CRIT_VAR;
CRIT_BEG;
if(cd->T303 != TIMER_IDLE)
{
STOP_TIMER(cd->T303_callout, T303_timeout, cd);
cd->T303 = TIMER_IDLE;
}
CRIT_END;
NDBGL3(L3_T_MSG, "cr = %d", cd->cr);
}
/*---------------------------------------------------------------------------*
* event handler
*---------------------------------------------------------------------------*/
void next_l3state(call_desc_t *cd, int event)
{
int currstate, newstate;
if(event > N_EVENTS)
panic("i4b_l3fsm.c: event > N_EVENTS\n");
currstate = cd->Q931state;
if(currstate > N_STATES)
panic("i4b_l3fsm.c: currstate > N_STATES\n");
newstate = l3state_tab[event][currstate].newstate;
if(newstate > N_STATES)
panic("i4b_l3fsm.c: newstate > N_STATES\n");
NDBGL3(L3_F_MSG, "L3 FSM event [%s]: [%s => %s]",
l3event_text[event],
l3state_text[currstate],
l3state_text[newstate]);
/* execute function */
(*l3state_tab[event][currstate].func)(cd);
if(newstate == ST_ILL)
{
newstate = currstate;
NDBGL3(L3_F_ERR, "FSM illegal state, state = %s, event = %s!",
l3state_text[newstate],
l3event_text[event]);
}
if(newstate != ST_SUSE)
cd->Q931state = newstate;
}
/*---------------------------------------------------------------------------*
* send command to the lower layers
*---------------------------------------------------------------------------*/
void
n_mgmt_command(struct isdn_l3_driver *d, int cmd, void *parm)
{
int i;
switch(cmd)
{
case CMR_DOPEN:
NDBGL3(L3_MSG, "CMR_DOPEN for isdnif %d", d->isdnif);
for(i=0; i < num_call_desc; i++)
{
if(call_desc[i].isdnif == d->isdnif)
{
call_desc[i].cdid = CDID_UNUSED;
}
}
d->dl_est = DL_DOWN;
for (i = 0; i < d->nbch; i++)
d->bch_state[i] = BCH_ST_FREE;
d->tei = -1;
break;
case CMR_DCLOSE:
NDBGL3(L3_MSG, "CMR_DCLOSE for isdnif %d", d->isdnif);
break;
default:
NDBGL3(L3_MSG, "unknown cmd %d for isdnif %d",
cmd, d->isdnif);
break;
}
i4b_mdl_command_req(d, cmd, parm);
}
/*---------------------------------------------------------------------------*
* timer T313 stop
*---------------------------------------------------------------------------*/
void
T313_stop(call_desc_t *cd)
{
CRIT_VAR;
CRIT_BEG;
if(cd->T313 != TIMER_IDLE)
{
cd->T313 = TIMER_IDLE;
callout_stop(&cd->T313_timeout);
}
CRIT_END;
NDBGL3(L3_T_MSG, "cr = %d", cd->cr);
}
/*---------------------------------------------------------------------------*
* L3 FSM some states event disconnect request from L4
*---------------------------------------------------------------------------*/
static void F_DCRQ(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_DCRQ executing");
/* stop T310 in case this is the result of an incoming call for a */
/* calledback connection */
if(cd->T310 == TIMER_ACTIVE)
T310_stop(cd);
/* cause from L4 */
i4b_l3_tx_disconnect(cd);
T305_start(cd);
cd->Q931state = ST_U11;
}
/*---------------------------------------------------------------------------*
* L3 FSM some states event DISCONNECT from L2
*---------------------------------------------------------------------------*/
static void F_DISC(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_DISC executing");
i4b_l3_stop_all_timers(cd);
/*
* no disconnect ind to L4, no jump to state U12
* instead we issue a RELEASE and jump to U19
*/
i4b_l3_tx_release(cd, 0);
cd->T308_first_to = 1;
T308_start(cd);
cd->Q931state = ST_U19;
}
/*---------------------------------------------------------------------------*
* L3 FSM state U6 event alert req from L4
*---------------------------------------------------------------------------*/
static void F_06D(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_06D executing");
if(i4b_get_dl_stat(cd) == DL_DOWN)
{
DL_Est_Req(ctrl_desc[cd->controller].unit);
cd->Q931state = ST_IWL;
}
else
{
i4b_l3_tx_alert(cd);
cd->Q931state = ST_U7;
}
}
/*---------------------------------------------------------------------------*
* L3 FSM state U19 event STATUS from L2
*---------------------------------------------------------------------------*/
static void F_19I(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_19I executing");
if(cd->call_state == 0)
{
i4b_l4_status_ind(cd);
freecd_by_cd(cd);
cd->Q931state = ST_U0;
}
else
{
cd->Q931state = ST_U19;
}
}
/*---------------------------------------------------------------------------*
* L3 FSM state U1 event SETUP ACK from L2
*---------------------------------------------------------------------------*/
static void F_01L(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_01L executing");
T303_stop(cd);
/*
* since this implementation does NOT support overlap sending,
* we react here as if we received a CALL PROCEEDING because
* several PBX's react with a SETUP ACK even if the called
* number is complete AND we sent a SENDING COMPLETE in the
* preceding SETUP message. (-hm)
*/
T310_start(cd);
i4b_l4_proceeding_ind(cd);
}
/*---------------------------------------------------------------------------*
* L3 FSM state U6 event incoming setup accept from L4
*---------------------------------------------------------------------------*/
static void F_06E(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_06E executing");
if(i4b_get_dl_stat(cd) == DL_DOWN)
{
DL_Est_Req(ctrl_desc[cd->controller].unit);
cd->Q931state = ST_IWA;
}
else
{
i4b_l3_tx_connect(cd);
cd->Q931state = ST_U8;
}
T313_start(cd);
}
/*---------------------------------------------------------------------------*
* L3 FSM state U1 event T303 timeout
*---------------------------------------------------------------------------*/
static void F_01U(call_desc_t *cd)
{
NDBGL3(L3_F_MSG, "FSM function F_01U executing");
if(cd->T303_first_to == 1)
{
cd->T303_first_to = 0;
i4b_l3_tx_setup(cd);
T303_start(cd);
cd->Q931state = ST_U1;
}
else
{
i4b_l4_disconnect_ind(cd);
freecd_by_cd(cd);
cd->Q931state = ST_U0;
}
}
