/*
|
/*
|
* ROSE release 003
|
* ROSE release 003
|
*
|
*
|
* This code REQUIRES 2.1.15 or higher/ NET3.038
|
* This code REQUIRES 2.1.15 or higher/ NET3.038
|
*
|
*
|
* This module:
|
* This module:
|
* This module is free software; you can redistribute it and/or
|
* This module is free software; you can redistribute it and/or
|
* modify it under the terms of the GNU General Public License
|
* modify it under the terms of the GNU General Public License
|
* as published by the Free Software Foundation; either version
|
* as published by the Free Software Foundation; either version
|
* 2 of the License, or (at your option) any later version.
|
* 2 of the License, or (at your option) any later version.
|
*
|
*
|
* History
|
* History
|
* ROSE 001 Jonathan(G4KLX) Cloned from nr_timer.c
|
* ROSE 001 Jonathan(G4KLX) Cloned from nr_timer.c
|
* ROSE 003 Jonathan(G4KLX) New timer architecture.
|
* ROSE 003 Jonathan(G4KLX) New timer architecture.
|
* Implemented idle timer.
|
* Implemented idle timer.
|
*/
|
*/
|
|
|
#include <linux/errno.h>
|
#include <linux/errno.h>
|
#include <linux/types.h>
|
#include <linux/types.h>
|
#include <linux/socket.h>
|
#include <linux/socket.h>
|
#include <linux/in.h>
|
#include <linux/in.h>
|
#include <linux/kernel.h>
|
#include <linux/kernel.h>
|
#include <linux/sched.h>
|
#include <linux/sched.h>
|
#include <linux/timer.h>
|
#include <linux/timer.h>
|
#include <linux/string.h>
|
#include <linux/string.h>
|
#include <linux/sockios.h>
|
#include <linux/sockios.h>
|
#include <linux/net.h>
|
#include <linux/net.h>
|
#include <net/ax25.h>
|
#include <net/ax25.h>
|
#include <linux/inet.h>
|
#include <linux/inet.h>
|
#include <linux/netdevice.h>
|
#include <linux/netdevice.h>
|
#include <linux/skbuff.h>
|
#include <linux/skbuff.h>
|
#include <net/sock.h>
|
#include <net/sock.h>
|
#include <asm/segment.h>
|
#include <asm/segment.h>
|
#include <asm/system.h>
|
#include <asm/system.h>
|
#include <linux/fcntl.h>
|
#include <linux/fcntl.h>
|
#include <linux/mm.h>
|
#include <linux/mm.h>
|
#include <linux/interrupt.h>
|
#include <linux/interrupt.h>
|
#include <net/rose.h>
|
#include <net/rose.h>
|
|
|
static void rose_heartbeat_expiry(unsigned long);
|
static void rose_heartbeat_expiry(unsigned long);
|
static void rose_timer_expiry(unsigned long);
|
static void rose_timer_expiry(unsigned long);
|
static void rose_idletimer_expiry(unsigned long);
|
static void rose_idletimer_expiry(unsigned long);
|
|
|
void rose_start_heartbeat(struct sock *sk)
|
void rose_start_heartbeat(struct sock *sk)
|
{
|
{
|
del_timer(&sk->timer);
|
del_timer(&sk->timer);
|
|
|
sk->timer.data = (unsigned long)sk;
|
sk->timer.data = (unsigned long)sk;
|
sk->timer.function = &rose_heartbeat_expiry;
|
sk->timer.function = &rose_heartbeat_expiry;
|
sk->timer.expires = jiffies + 5 * HZ;
|
sk->timer.expires = jiffies + 5 * HZ;
|
|
|
add_timer(&sk->timer);
|
add_timer(&sk->timer);
|
}
|
}
|
|
|
void rose_start_t1timer(struct sock *sk)
|
void rose_start_t1timer(struct sock *sk)
|
{
|
{
|
del_timer(&sk->protinfo.rose->timer);
|
del_timer(&sk->protinfo.rose->timer);
|
|
|
sk->protinfo.rose->timer.data = (unsigned long)sk;
|
sk->protinfo.rose->timer.data = (unsigned long)sk;
|
sk->protinfo.rose->timer.function = &rose_timer_expiry;
|
sk->protinfo.rose->timer.function = &rose_timer_expiry;
|
sk->protinfo.rose->timer.expires = jiffies + sk->protinfo.rose->t1;
|
sk->protinfo.rose->timer.expires = jiffies + sk->protinfo.rose->t1;
|
|
|
add_timer(&sk->protinfo.rose->timer);
|
add_timer(&sk->protinfo.rose->timer);
|
}
|
}
|
|
|
void rose_start_t2timer(struct sock *sk)
|
void rose_start_t2timer(struct sock *sk)
|
{
|
{
|
del_timer(&sk->protinfo.rose->timer);
|
del_timer(&sk->protinfo.rose->timer);
|
|
|
sk->protinfo.rose->timer.data = (unsigned long)sk;
|
sk->protinfo.rose->timer.data = (unsigned long)sk;
|
sk->protinfo.rose->timer.function = &rose_timer_expiry;
|
sk->protinfo.rose->timer.function = &rose_timer_expiry;
|
sk->protinfo.rose->timer.expires = jiffies + sk->protinfo.rose->t2;
|
sk->protinfo.rose->timer.expires = jiffies + sk->protinfo.rose->t2;
|
|
|
add_timer(&sk->protinfo.rose->timer);
|
add_timer(&sk->protinfo.rose->timer);
|
}
|
}
|
|
|
void rose_start_t3timer(struct sock *sk)
|
void rose_start_t3timer(struct sock *sk)
|
{
|
{
|
del_timer(&sk->protinfo.rose->timer);
|
del_timer(&sk->protinfo.rose->timer);
|
|
|
sk->protinfo.rose->timer.data = (unsigned long)sk;
|
sk->protinfo.rose->timer.data = (unsigned long)sk;
|
sk->protinfo.rose->timer.function = &rose_timer_expiry;
|
sk->protinfo.rose->timer.function = &rose_timer_expiry;
|
sk->protinfo.rose->timer.expires = jiffies + sk->protinfo.rose->t3;
|
sk->protinfo.rose->timer.expires = jiffies + sk->protinfo.rose->t3;
|
|
|
add_timer(&sk->protinfo.rose->timer);
|
add_timer(&sk->protinfo.rose->timer);
|
}
|
}
|
|
|
void rose_start_hbtimer(struct sock *sk)
|
void rose_start_hbtimer(struct sock *sk)
|
{
|
{
|
del_timer(&sk->protinfo.rose->timer);
|
del_timer(&sk->protinfo.rose->timer);
|
|
|
sk->protinfo.rose->timer.data = (unsigned long)sk;
|
sk->protinfo.rose->timer.data = (unsigned long)sk;
|
sk->protinfo.rose->timer.function = &rose_timer_expiry;
|
sk->protinfo.rose->timer.function = &rose_timer_expiry;
|
sk->protinfo.rose->timer.expires = jiffies + sk->protinfo.rose->hb;
|
sk->protinfo.rose->timer.expires = jiffies + sk->protinfo.rose->hb;
|
|
|
add_timer(&sk->protinfo.rose->timer);
|
add_timer(&sk->protinfo.rose->timer);
|
}
|
}
|
|
|
void rose_start_idletimer(struct sock *sk)
|
void rose_start_idletimer(struct sock *sk)
|
{
|
{
|
del_timer(&sk->protinfo.rose->idletimer);
|
del_timer(&sk->protinfo.rose->idletimer);
|
|
|
if (sk->protinfo.rose->idle > 0) {
|
if (sk->protinfo.rose->idle > 0) {
|
sk->protinfo.rose->idletimer.data = (unsigned long)sk;
|
sk->protinfo.rose->idletimer.data = (unsigned long)sk;
|
sk->protinfo.rose->idletimer.function = &rose_idletimer_expiry;
|
sk->protinfo.rose->idletimer.function = &rose_idletimer_expiry;
|
sk->protinfo.rose->idletimer.expires = jiffies + sk->protinfo.rose->idle;
|
sk->protinfo.rose->idletimer.expires = jiffies + sk->protinfo.rose->idle;
|
|
|
add_timer(&sk->protinfo.rose->idletimer);
|
add_timer(&sk->protinfo.rose->idletimer);
|
}
|
}
|
}
|
}
|
|
|
void rose_stop_heartbeat(struct sock *sk)
|
void rose_stop_heartbeat(struct sock *sk)
|
{
|
{
|
del_timer(&sk->timer);
|
del_timer(&sk->timer);
|
}
|
}
|
|
|
void rose_stop_timer(struct sock *sk)
|
void rose_stop_timer(struct sock *sk)
|
{
|
{
|
del_timer(&sk->protinfo.rose->timer);
|
del_timer(&sk->protinfo.rose->timer);
|
}
|
}
|
|
|
void rose_stop_idletimer(struct sock *sk)
|
void rose_stop_idletimer(struct sock *sk)
|
{
|
{
|
del_timer(&sk->protinfo.rose->idletimer);
|
del_timer(&sk->protinfo.rose->idletimer);
|
}
|
}
|
|
|
static void rose_heartbeat_expiry(unsigned long param)
|
static void rose_heartbeat_expiry(unsigned long param)
|
{
|
{
|
struct sock *sk = (struct sock *)param;
|
struct sock *sk = (struct sock *)param;
|
|
|
switch (sk->protinfo.rose->state) {
|
switch (sk->protinfo.rose->state) {
|
|
|
case ROSE_STATE_0:
|
case ROSE_STATE_0:
|
/* Magic here: If we listen() and a new link dies before it
|
/* Magic here: If we listen() and a new link dies before it
|
is accepted() it isn't 'dead' so doesn't get removed. */
|
is accepted() it isn't 'dead' so doesn't get removed. */
|
if (sk->destroy || (sk->state == TCP_LISTEN && sk->dead)) {
|
if (sk->destroy || (sk->state == TCP_LISTEN && sk->dead)) {
|
rose_destroy_socket(sk);
|
rose_destroy_socket(sk);
|
return;
|
return;
|
}
|
}
|
break;
|
break;
|
|
|
case ROSE_STATE_3:
|
case ROSE_STATE_3:
|
/*
|
/*
|
* Check for the state of the receive buffer.
|
* Check for the state of the receive buffer.
|
*/
|
*/
|
if (atomic_read(&sk->rmem_alloc) < (sk->rcvbuf / 2) &&
|
if (atomic_read(&sk->rmem_alloc) < (sk->rcvbuf / 2) &&
|
(sk->protinfo.rose->condition & ROSE_COND_OWN_RX_BUSY)) {
|
(sk->protinfo.rose->condition & ROSE_COND_OWN_RX_BUSY)) {
|
sk->protinfo.rose->condition &= ~ROSE_COND_OWN_RX_BUSY;
|
sk->protinfo.rose->condition &= ~ROSE_COND_OWN_RX_BUSY;
|
sk->protinfo.rose->condition &= ~ROSE_COND_ACK_PENDING;
|
sk->protinfo.rose->condition &= ~ROSE_COND_ACK_PENDING;
|
sk->protinfo.rose->vl = sk->protinfo.rose->vr;
|
sk->protinfo.rose->vl = sk->protinfo.rose->vr;
|
rose_write_internal(sk, ROSE_RR);
|
rose_write_internal(sk, ROSE_RR);
|
rose_stop_timer(sk); /* HB */
|
rose_stop_timer(sk); /* HB */
|
break;
|
break;
|
}
|
}
|
break;
|
break;
|
}
|
}
|
|
|
rose_start_heartbeat(sk);
|
rose_start_heartbeat(sk);
|
}
|
}
|
|
|
static void rose_timer_expiry(unsigned long param)
|
static void rose_timer_expiry(unsigned long param)
|
{
|
{
|
struct sock *sk = (struct sock *)param;
|
struct sock *sk = (struct sock *)param;
|
|
|
switch (sk->protinfo.rose->state) {
|
switch (sk->protinfo.rose->state) {
|
|
|
case ROSE_STATE_1: /* T1 */
|
case ROSE_STATE_1: /* T1 */
|
case ROSE_STATE_4: /* T2 */
|
case ROSE_STATE_4: /* T2 */
|
rose_write_internal(sk, ROSE_CLEAR_REQUEST);
|
rose_write_internal(sk, ROSE_CLEAR_REQUEST);
|
sk->protinfo.rose->state = ROSE_STATE_2;
|
sk->protinfo.rose->state = ROSE_STATE_2;
|
rose_start_t3timer(sk);
|
rose_start_t3timer(sk);
|
break;
|
break;
|
|
|
case ROSE_STATE_2: /* T3 */
|
case ROSE_STATE_2: /* T3 */
|
sk->protinfo.rose->neighbour->use--;
|
sk->protinfo.rose->neighbour->use--;
|
rose_disconnect(sk, ETIMEDOUT, -1, -1);
|
rose_disconnect(sk, ETIMEDOUT, -1, -1);
|
break;
|
break;
|
|
|
case ROSE_STATE_3: /* HB */
|
case ROSE_STATE_3: /* HB */
|
if (sk->protinfo.rose->condition & ROSE_COND_ACK_PENDING) {
|
if (sk->protinfo.rose->condition & ROSE_COND_ACK_PENDING) {
|
sk->protinfo.rose->condition &= ~ROSE_COND_ACK_PENDING;
|
sk->protinfo.rose->condition &= ~ROSE_COND_ACK_PENDING;
|
rose_enquiry_response(sk);
|
rose_enquiry_response(sk);
|
}
|
}
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
static void rose_idletimer_expiry(unsigned long param)
|
static void rose_idletimer_expiry(unsigned long param)
|
{
|
{
|
struct sock *sk = (struct sock *)param;
|
struct sock *sk = (struct sock *)param;
|
|
|
rose_clear_queues(sk);
|
rose_clear_queues(sk);
|
|
|
rose_write_internal(sk, ROSE_CLEAR_REQUEST);
|
rose_write_internal(sk, ROSE_CLEAR_REQUEST);
|
sk->protinfo.rose->state = ROSE_STATE_2;
|
sk->protinfo.rose->state = ROSE_STATE_2;
|
|
|
rose_start_t3timer(sk);
|
rose_start_t3timer(sk);
|
|
|
sk->state = TCP_CLOSE;
|
sk->state = TCP_CLOSE;
|
sk->err = 0;
|
sk->err = 0;
|
sk->shutdown |= SEND_SHUTDOWN;
|
sk->shutdown |= SEND_SHUTDOWN;
|
|
|
if (!sk->dead)
|
if (!sk->dead)
|
sk->state_change(sk);
|
sk->state_change(sk);
|
|
|
sk->dead = 1;
|
sk->dead = 1;
|
}
|
}
|
|
|