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/*
* NET/ROM release 006
*
* This code REQUIRES 1.2.1 or higher/ NET3.029
*
* This module:
* This module is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* History
* NET/ROM 001 Jonathan(G4KLX) Cloned from ax25_timer.c
*/
#include <linux/config.h>
#if defined(CONFIG_NETROM) || defined(CONFIG_NETROM_MODULE)
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <asm/segment.h>
#include <asm/system.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <net/netrom.h>
static void nr_timer(unsigned long);
/*
* Linux set timer
*/
void nr_set_timer(struct sock *sk)
{
unsigned long flags;
save_flags(flags); cli();
del_timer(&sk->timer);
restore_flags(flags);
sk->timer.data = (unsigned long)sk;
sk->timer.function = &nr_timer;
sk->timer.expires = jiffies+10;
add_timer(&sk->timer);
}
/*
* NET/ROM TIMER
*
* This routine is called every 100ms. Decrement timer by this
* amount - if expired then process the event.
*/
static void nr_timer(unsigned long param)
{
struct sock *sk = (struct sock *)param;
switch (sk->protinfo.nr->state) {
case NR_STATE_0:
/* Magic here: If we listen() and a new link dies before it
is accepted() it isn't 'dead' so doesn't get removed. */
if (sk->destroy || (sk->state == TCP_LISTEN && sk->dead)) {
del_timer(&sk->timer);
nr_destroy_socket(sk);
return;
}
break;
case NR_STATE_3:
/*
* Check for the state of the receive buffer.
*/
if (sk->rmem_alloc < (sk->rcvbuf / 2) && (sk->protinfo.nr->condition & NR_COND_OWN_RX_BUSY)) {
sk->protinfo.nr->condition &= ~NR_COND_OWN_RX_BUSY;
sk->protinfo.nr->condition &= ~NR_COND_ACK_PENDING;
sk->protinfo.nr->vl = sk->protinfo.nr->vr;
nr_write_internal(sk, NR_INFOACK);
break;
}
/*
* Check for frames to transmit.
*/
nr_kick(sk);
break;
default:
break;
}
if (sk->protinfo.nr->t2timer > 0 && --sk->protinfo.nr->t2timer == 0) {
if (sk->protinfo.nr->state == NR_STATE_3) {
if (sk->protinfo.nr->condition & NR_COND_ACK_PENDING) {
sk->protinfo.nr->condition &= ~NR_COND_ACK_PENDING;
nr_enquiry_response(sk);
}
}
}
if (sk->protinfo.nr->t4timer > 0 && --sk->protinfo.nr->t4timer == 0) {
sk->protinfo.nr->condition &= ~NR_COND_PEER_RX_BUSY;
}
if (sk->protinfo.nr->t1timer == 0 || --sk->protinfo.nr->t1timer > 0) {
nr_set_timer(sk);
return;
}
switch (sk->protinfo.nr->state) {
case NR_STATE_1:
if (sk->protinfo.nr->n2count == sk->protinfo.nr->n2) {
nr_clear_queues(sk);
sk->protinfo.nr->state = NR_STATE_0;
sk->state = TCP_CLOSE;
sk->err = ETIMEDOUT;
sk->shutdown |= SEND_SHUTDOWN;
if (!sk->dead)
sk->state_change(sk);
sk->dead = 1;
} else {
sk->protinfo.nr->n2count++;
nr_write_internal(sk, NR_CONNREQ);
}
break;
case NR_STATE_2:
if (sk->protinfo.nr->n2count == sk->protinfo.nr->n2) {
nr_clear_queues(sk);
sk->protinfo.nr->state = NR_STATE_0;
sk->state = TCP_CLOSE;
sk->err = ETIMEDOUT;
sk->shutdown |= SEND_SHUTDOWN;
if (!sk->dead)
sk->state_change(sk);
sk->dead = 1;
} else {
sk->protinfo.nr->n2count++;
nr_write_internal(sk, NR_DISCREQ);
}
break;
case NR_STATE_3:
if (sk->protinfo.nr->n2count == sk->protinfo.nr->n2) {
nr_clear_queues(sk);
sk->protinfo.nr->state = NR_STATE_0;
sk->state = TCP_CLOSE;
sk->err = ETIMEDOUT;
sk->shutdown |= SEND_SHUTDOWN;
if (!sk->dead)
sk->state_change(sk);
sk->dead = 1;
} else {
sk->protinfo.nr->n2count++;
nr_requeue_frames(sk);
}
break;
}
sk->protinfo.nr->t1timer = sk->protinfo.nr->t1;
nr_set_timer(sk);
}
#endif
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