/*
* State machine for state 2, Awaiting Release State.
* The handling of the timer(s) is in file lapb_timer.c
*/
static void lapb_state2_machine(struct lapb_cb *lapb, struct sk_buff *skb,
struct lapb_frame *frame)
{
switch (frame->type) {
case LAPB_SABM:
case LAPB_SABME:
lapb_dbg(1, "(%p) S2 RX {SABM,SABME}(%d)\n",
lapb->dev, frame->pf);
lapb_dbg(1, "(%p) S2 TX DM(%d)\n", lapb->dev, frame->pf);
lapb_send_control(lapb, LAPB_DM, frame->pf, LAPB_RESPONSE);
break;
case LAPB_DISC:
lapb_dbg(1, "(%p) S2 RX DISC(%d)\n", lapb->dev, frame->pf);
lapb_dbg(1, "(%p) S2 TX UA(%d)\n", lapb->dev, frame->pf);
lapb_send_control(lapb, LAPB_UA, frame->pf, LAPB_RESPONSE);
break;
case LAPB_UA:
lapb_dbg(1, "(%p) S2 RX UA(%d)\n", lapb->dev, frame->pf);
if (frame->pf) {
lapb_dbg(0, "(%p) S2 -> S0\n", lapb->dev);
lapb->state = LAPB_STATE_0;
lapb_start_t1timer(lapb);
lapb_stop_t2timer(lapb);
lapb_disconnect_confirmation(lapb, LAPB_OK);
}
break;
case LAPB_DM:
lapb_dbg(1, "(%p) S2 RX DM(%d)\n", lapb->dev, frame->pf);
if (frame->pf) {
lapb_dbg(0, "(%p) S2 -> S0\n", lapb->dev);
lapb->state = LAPB_STATE_0;
lapb_start_t1timer(lapb);
lapb_stop_t2timer(lapb);
lapb_disconnect_confirmation(lapb, LAPB_NOTCONNECTED);
}
break;
case LAPB_I:
case LAPB_REJ:
case LAPB_RNR:
case LAPB_RR:
lapb_dbg(1, "(%p) S2 RX {I,REJ,RNR,RR}(%d)\n",
lapb->dev, frame->pf);
lapb_dbg(1, "(%p) S2 RX DM(%d)\n", lapb->dev, frame->pf);
if (frame->pf)
lapb_send_control(lapb, LAPB_DM, frame->pf,
LAPB_RESPONSE);
break;
}
kfree_skb(skb);
}
/*
* State machine for state 2, Awaiting Release State.
* The handling of the timer(s) is in file lapb_timer.c
*/
void lapb_state2_machine(struct lapb_cs * lapb, struct lapb_frame * frame) {
//struct lapb_cs_internal * lapb_int = lapb_get_internal(lapb);
switch (frame->type) {
// case LAPB_SABM:
// case LAPB_SABME:
// lapb->callbacks->debug(2, "[LAPB] S2 RX {SABM,SABME}(%d)", frame->pf);
// lapb->callbacks->debug(2, "[LAPB] S2 TX DM(%d)", frame->pf);
// lapb_send_control(lapb, LAPB_DM, frame->pf, LAPB_RESPONSE);
// lapb_reset(lapb, LAPB_STATE_0);
// break;
case LAPB_DISC:
lapb->callbacks->debug(2, "[LAPB] S2 RX DISC(%d)", frame->pf);
lapb->callbacks->debug(2, "[LAPB] S2 TX UA(%d)", frame->pf);
lapb_send_control(lapb, LAPB_UA, frame->pf, LAPB_RESPONSE);
break;
case LAPB_UA:
lapb->callbacks->debug(2, "[LAPB] S2 RX UA(%d)", frame->pf);
lapb_requeue_frames(lapb);
lapb_disconnect_confirmation(lapb, LAPB_OK);
lapb_reset(lapb, LAPB_STATE_0);
break;
case LAPB_DM:
lapb->callbacks->debug(2, "[LAPB] S2 RX DM(%d)", frame->pf);
lapb_requeue_frames(lapb);
lapb_disconnect_confirmation(lapb, LAPB_NOTCONNECTED);
lapb_reset(lapb, LAPB_STATE_0);
break;
// case LAPB_I:
// case LAPB_REJ:
// case LAPB_RNR:
// case LAPB_RR:
// lapb->callbacks->debug(2, "[LAPB] S2 RX {I,REJ,RNR,RR}(%d)", frame->pf);
// lapb->callbacks->debug(2, "[LAPB] S2 TX DM(%d)", frame->pf);
// if (frame->pf)
// lapb_send_control(lapb, LAPB_DM, frame->pf, LAPB_RESPONSE);
// break;
};
}
static void lapb_t1timer_expiry(unsigned long param)
{
lapb_cb *lapb = (lapb_cb *)param;
switch (lapb->state) {
/*
* If we are a DCE, keep going DM .. DM .. DM
*/
case LAPB_STATE_0:
if (lapb->mode & LAPB_DCE)
lapb_send_control(lapb, LAPB_DM, LAPB_POLLOFF, LAPB_RESPONSE);
break;
/*
* Awaiting connection state, send SABM(E), up to N2 times.
*/
case LAPB_STATE_1:
if (lapb->n2count == lapb->n2) {
lapb_clear_queues(lapb);
lapb->state = LAPB_STATE_0;
lapb_disconnect_indication(lapb, LAPB_TIMEDOUT);
#if LAPB_DEBUG > 0
printk(KERN_DEBUG "lapb: (%p) S1 -> S0\n", lapb->token);
#endif
return;
} else {
lapb->n2count++;
if (lapb->mode & LAPB_EXTENDED) {
#if LAPB_DEBUG > 1
printk(KERN_DEBUG "lapb: (%p) S1 TX SABME(1)\n", lapb->token);
#endif
lapb_send_control(lapb, LAPB_SABME, LAPB_POLLON, LAPB_COMMAND);
} else {
#if LAPB_DEBUG > 1
printk(KERN_DEBUG "lapb: (%p) S1 TX SABM(1)\n", lapb->token);
#endif
lapb_send_control(lapb, LAPB_SABM, LAPB_POLLON, LAPB_COMMAND);
}
}
break;
/*
* Awaiting disconnection state, send DISC, up to N2 times.
*/
case LAPB_STATE_2:
if (lapb->n2count == lapb->n2) {
lapb_clear_queues(lapb);
lapb->state = LAPB_STATE_0;
lapb_disconnect_confirmation(lapb, LAPB_TIMEDOUT);
#if LAPB_DEBUG > 0
printk(KERN_DEBUG "lapb: (%p) S2 -> S0\n", lapb->token);
#endif
return;
} else {
lapb->n2count++;
#if LAPB_DEBUG > 1
printk(KERN_DEBUG "lapb: (%p) S2 TX DISC(1)\n", lapb->token);
#endif
lapb_send_control(lapb, LAPB_DISC, LAPB_POLLON, LAPB_COMMAND);
}
break;
/*
* Data transfer state, restransmit I frames, up to N2 times.
*/
case LAPB_STATE_3:
if (lapb->n2count == lapb->n2) {
lapb_clear_queues(lapb);
lapb->state = LAPB_STATE_0;
lapb_stop_t2timer(lapb);
lapb_disconnect_indication(lapb, LAPB_TIMEDOUT);
#if LAPB_DEBUG > 0
printk(KERN_DEBUG "lapb: (%p) S3 -> S0\n", lapb->token);
#endif
return;
} else {
lapb->n2count++;
lapb_requeue_frames(lapb);
}
break;
/*
* Frame reject state, restransmit FRMR frames, up to N2 times.
*/
case LAPB_STATE_4:
if (lapb->n2count == lapb->n2) {
lapb_clear_queues(lapb);
lapb->state = LAPB_STATE_0;
lapb_disconnect_indication(lapb, LAPB_TIMEDOUT);
#if LAPB_DEBUG > 0
printk(KERN_DEBUG "lapb: (%p) S4 -> S0\n", lapb->token);
#endif
return;
} else {
lapb->n2count++;
lapb_transmit_frmr(lapb);
}
break;
}
lapb_start_t1timer(lapb);
}
static void lapb_t1timer_expiry(unsigned long param)
{
struct lapb_cb *lapb = (struct lapb_cb *)param;
switch (lapb->state) {
case LAPB_STATE_0:
if (lapb->mode & LAPB_DCE)
lapb_send_control(lapb, LAPB_DM, LAPB_POLLOFF, LAPB_RESPONSE);
break;
case LAPB_STATE_1:
if (lapb->n2count == lapb->n2) {
lapb_clear_queues(lapb);
lapb->state = LAPB_STATE_0;
lapb_disconnect_indication(lapb, LAPB_TIMEDOUT);
#if LAPB_DEBUG > 0
printk(KERN_DEBUG "lapb: (%p) S1 -> S0\n", lapb->dev);
#endif
return;
} else {
lapb->n2count++;
if (lapb->mode & LAPB_EXTENDED) {
#if LAPB_DEBUG > 1
printk(KERN_DEBUG "lapb: (%p) S1 TX SABME(1)\n", lapb->dev);
#endif
lapb_send_control(lapb, LAPB_SABME, LAPB_POLLON, LAPB_COMMAND);
} else {
#if LAPB_DEBUG > 1
printk(KERN_DEBUG "lapb: (%p) S1 TX SABM(1)\n", lapb->dev);
#endif
lapb_send_control(lapb, LAPB_SABM, LAPB_POLLON, LAPB_COMMAND);
}
}
break;
case LAPB_STATE_2:
if (lapb->n2count == lapb->n2) {
lapb_clear_queues(lapb);
lapb->state = LAPB_STATE_0;
lapb_disconnect_confirmation(lapb, LAPB_TIMEDOUT);
#if LAPB_DEBUG > 0
printk(KERN_DEBUG "lapb: (%p) S2 -> S0\n", lapb->dev);
#endif
return;
} else {
lapb->n2count++;
#if LAPB_DEBUG > 1
printk(KERN_DEBUG "lapb: (%p) S2 TX DISC(1)\n", lapb->dev);
#endif
lapb_send_control(lapb, LAPB_DISC, LAPB_POLLON, LAPB_COMMAND);
}
break;
case LAPB_STATE_3:
if (lapb->n2count == lapb->n2) {
lapb_clear_queues(lapb);
lapb->state = LAPB_STATE_0;
lapb_stop_t2timer(lapb);
lapb_disconnect_indication(lapb, LAPB_TIMEDOUT);
#if LAPB_DEBUG > 0
printk(KERN_DEBUG "lapb: (%p) S3 -> S0\n", lapb->dev);
#endif
return;
} else {
lapb->n2count++;
lapb_requeue_frames(lapb);
}
break;
case LAPB_STATE_4:
if (lapb->n2count == lapb->n2) {
lapb_clear_queues(lapb);
lapb->state = LAPB_STATE_0;
lapb_disconnect_indication(lapb, LAPB_TIMEDOUT);
#if LAPB_DEBUG > 0
printk(KERN_DEBUG "lapb: (%p) S4 -> S0\n", lapb->dev);
#endif
return;
} else {
lapb->n2count++;
lapb_transmit_frmr(lapb);
}
break;
}
lapb_start_t1timer(lapb);
}
/*
* State machine for state 2, Awaiting Release State.
* The handling of the timer(s) is in file lapb_timer.c
*/
static void lapb_state2_machine(lapb_cb *lapb, struct sk_buff *skb, struct lapb_frame *frame)
{
switch (frame->type) {
case LAPB_SABM:
case LAPB_SABME:
#if LAPB_DEBUG > 1
printk(KERN_DEBUG "lapb: (%p) S2 RX {SABM,SABME}(%d)\n", lapb->token, frame->pf);
printk(KERN_DEBUG "lapb: (%p) S2 TX DM(%d)\n", lapb->token, frame->pf);
#endif
lapb_send_control(lapb, LAPB_DM, frame->pf, LAPB_RESPONSE);
break;
case LAPB_DISC:
#if LAPB_DEBUG > 1
printk(KERN_DEBUG "lapb: (%p) S2 RX DISC(%d)\n", lapb->token, frame->pf);
printk(KERN_DEBUG "lapb: (%p) S2 TX UA(%d)\n", lapb->token, frame->pf);
#endif
lapb_send_control(lapb, LAPB_UA, frame->pf, LAPB_RESPONSE);
break;
case LAPB_UA:
#if LAPB_DEBUG > 1
printk(KERN_DEBUG "lapb: (%p) S2 RX UA(%d)\n", lapb->token, frame->pf);
#endif
if (frame->pf) {
#if LAPB_DEBUG > 0
printk(KERN_DEBUG "lapb: (%p) S2 -> S0\n", lapb->token);
#endif
lapb->state = LAPB_STATE_0;
lapb_start_t1timer(lapb);
lapb_stop_t2timer(lapb);
lapb_disconnect_confirmation(lapb, LAPB_OK);
}
break;
case LAPB_DM:
#if LAPB_DEBUG > 1
printk(KERN_DEBUG "lapb: (%p) S2 RX DM(%d)\n", lapb->token, frame->pf);
#endif
if (frame->pf) {
#if LAPB_DEBUG > 0
printk(KERN_DEBUG "lapb: (%p) S2 -> S0\n", lapb->token);
#endif
lapb->state = LAPB_STATE_0;
lapb_start_t1timer(lapb);
lapb_stop_t2timer(lapb);
lapb_disconnect_confirmation(lapb, LAPB_NOTCONNECTED);
}
break;
case LAPB_I:
case LAPB_REJ:
case LAPB_RNR:
case LAPB_RR:
#if LAPB_DEBUG > 1
printk(KERN_DEBUG "lapb: (%p) S2 RX {I,REJ,RNR,RR}(%d)\n", lapb->token, frame->pf);
printk(KERN_DEBUG "lapb: (%p) S2 RX DM(%d)\n", lapb->token, frame->pf);
#endif
if (frame->pf) lapb_send_control(lapb, LAPB_DM, frame->pf, LAPB_RESPONSE);
break;
default:
break;
}
kfree_skb(skb);
}
