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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [net/] [ax25/] [ax25_std_timer.c] - Diff between revs 1275 and 1765

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Rev 1275 Rev 1765
/*
/*
 *      AX.25 release 037
 *      AX.25 release 037
 *
 *
 *      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
 *      AX.25 028a      Jonathan(G4KLX) New state machine based on SDL diagrams.
 *      AX.25 028a      Jonathan(G4KLX) New state machine based on SDL diagrams.
 *      AX.25 028b      Jonathan(G4KLX) Extracted AX25 control block from the
 *      AX.25 028b      Jonathan(G4KLX) Extracted AX25 control block from the
 *                                      sock structure.
 *                                      sock structure.
 *      AX.25 029       Alan(GW4PTS)    Switched to KA9Q constant names.
 *      AX.25 029       Alan(GW4PTS)    Switched to KA9Q constant names.
 *      AX.25 031       Joerg(DL1BKE)   Added DAMA support
 *      AX.25 031       Joerg(DL1BKE)   Added DAMA support
 *      AX.25 032       Joerg(DL1BKE)   Fixed DAMA timeout bug
 *      AX.25 032       Joerg(DL1BKE)   Fixed DAMA timeout bug
 *      AX.25 033       Jonathan(G4KLX) Modularisation functions.
 *      AX.25 033       Jonathan(G4KLX) Modularisation functions.
 *      AX.25 035       Frederic(F1OAT) Support for pseudo-digipeating.
 *      AX.25 035       Frederic(F1OAT) Support for pseudo-digipeating.
 *      AX.25 036       Jonathan(G4KLX) Split from ax25_timer.c.
 *      AX.25 036       Jonathan(G4KLX) Split from ax25_timer.c.
 *      AX.25 037       Jonathan(G4KLX) New timer architecture.
 *      AX.25 037       Jonathan(G4KLX) New timer architecture.
 */
 */
 
 
#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/uaccess.h>
#include <asm/uaccess.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>
 
 
void ax25_std_heartbeat_expiry(ax25_cb *ax25)
void ax25_std_heartbeat_expiry(ax25_cb *ax25)
{
{
        switch (ax25->state) {
        switch (ax25->state) {
 
 
                case AX25_STATE_0:
                case AX25_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 (ax25->sk == NULL || ax25->sk->destroy || (ax25->sk->state == TCP_LISTEN && ax25->sk->dead)) {
                        if (ax25->sk == NULL || ax25->sk->destroy || (ax25->sk->state == TCP_LISTEN && ax25->sk->dead)) {
                                ax25_destroy_socket(ax25);
                                ax25_destroy_socket(ax25);
                                return;
                                return;
                        }
                        }
                        break;
                        break;
 
 
                case AX25_STATE_3:
                case AX25_STATE_3:
                case AX25_STATE_4:
                case AX25_STATE_4:
                        /*
                        /*
                         * Check the state of the receive buffer.
                         * Check the state of the receive buffer.
                         */
                         */
                        if (ax25->sk != NULL) {
                        if (ax25->sk != NULL) {
                                if (atomic_read(&ax25->sk->rmem_alloc) < (ax25->sk->rcvbuf / 2) &&
                                if (atomic_read(&ax25->sk->rmem_alloc) < (ax25->sk->rcvbuf / 2) &&
                                    (ax25->condition & AX25_COND_OWN_RX_BUSY)) {
                                    (ax25->condition & AX25_COND_OWN_RX_BUSY)) {
                                        ax25->condition &= ~AX25_COND_OWN_RX_BUSY;
                                        ax25->condition &= ~AX25_COND_OWN_RX_BUSY;
                                        ax25->condition &= ~AX25_COND_ACK_PENDING;
                                        ax25->condition &= ~AX25_COND_ACK_PENDING;
                                        ax25_send_control(ax25, AX25_RR, AX25_POLLOFF, AX25_RESPONSE);
                                        ax25_send_control(ax25, AX25_RR, AX25_POLLOFF, AX25_RESPONSE);
                                        break;
                                        break;
                                }
                                }
                        }
                        }
        }
        }
 
 
        ax25_start_heartbeat(ax25);
        ax25_start_heartbeat(ax25);
}
}
 
 
void ax25_std_t2timer_expiry(ax25_cb *ax25)
void ax25_std_t2timer_expiry(ax25_cb *ax25)
{
{
        if (ax25->condition & AX25_COND_ACK_PENDING) {
        if (ax25->condition & AX25_COND_ACK_PENDING) {
                ax25->condition &= ~AX25_COND_ACK_PENDING;
                ax25->condition &= ~AX25_COND_ACK_PENDING;
                ax25_std_timeout_response(ax25);
                ax25_std_timeout_response(ax25);
        }
        }
}
}
 
 
void ax25_std_t3timer_expiry(ax25_cb *ax25)
void ax25_std_t3timer_expiry(ax25_cb *ax25)
{
{
        ax25->n2count = 0;
        ax25->n2count = 0;
        ax25_std_transmit_enquiry(ax25);
        ax25_std_transmit_enquiry(ax25);
        ax25->state   = AX25_STATE_4;
        ax25->state   = AX25_STATE_4;
}
}
 
 
void ax25_std_idletimer_expiry(ax25_cb *ax25)
void ax25_std_idletimer_expiry(ax25_cb *ax25)
{
{
        ax25_clear_queues(ax25);
        ax25_clear_queues(ax25);
 
 
        ax25->n2count = 0;
        ax25->n2count = 0;
        ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
        ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
        ax25->state   = AX25_STATE_2;
        ax25->state   = AX25_STATE_2;
 
 
        ax25_calculate_t1(ax25);
        ax25_calculate_t1(ax25);
        ax25_start_t1timer(ax25);
        ax25_start_t1timer(ax25);
        ax25_stop_t2timer(ax25);
        ax25_stop_t2timer(ax25);
        ax25_stop_t3timer(ax25);
        ax25_stop_t3timer(ax25);
 
 
        if (ax25->sk != NULL) {
        if (ax25->sk != NULL) {
                ax25->sk->state     = TCP_CLOSE;
                ax25->sk->state     = TCP_CLOSE;
                ax25->sk->err       = 0;
                ax25->sk->err       = 0;
                ax25->sk->shutdown |= SEND_SHUTDOWN;
                ax25->sk->shutdown |= SEND_SHUTDOWN;
                if (!ax25->sk->dead)
                if (!ax25->sk->dead)
                        ax25->sk->state_change(ax25->sk);
                        ax25->sk->state_change(ax25->sk);
                ax25->sk->dead      = 1;
                ax25->sk->dead      = 1;
        }
        }
}
}
 
 
void ax25_std_t1timer_expiry(ax25_cb *ax25)
void ax25_std_t1timer_expiry(ax25_cb *ax25)
{
{
        switch (ax25->state) {
        switch (ax25->state) {
                case AX25_STATE_1:
                case AX25_STATE_1:
                        if (ax25->n2count == ax25->n2) {
                        if (ax25->n2count == ax25->n2) {
                                if (ax25->modulus == AX25_MODULUS) {
                                if (ax25->modulus == AX25_MODULUS) {
                                        ax25_disconnect(ax25, ETIMEDOUT);
                                        ax25_disconnect(ax25, ETIMEDOUT);
                                        return;
                                        return;
                                } else {
                                } else {
                                        ax25->modulus = AX25_MODULUS;
                                        ax25->modulus = AX25_MODULUS;
                                        ax25->window  = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
                                        ax25->window  = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
                                        ax25->n2count = 0;
                                        ax25->n2count = 0;
                                        ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
                                        ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
                                }
                                }
                        } else {
                        } else {
                                ax25->n2count++;
                                ax25->n2count++;
                                if (ax25->modulus == AX25_MODULUS)
                                if (ax25->modulus == AX25_MODULUS)
                                        ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
                                        ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
                                else
                                else
                                        ax25_send_control(ax25, AX25_SABME, AX25_POLLON, AX25_COMMAND);
                                        ax25_send_control(ax25, AX25_SABME, AX25_POLLON, AX25_COMMAND);
                        }
                        }
                        break;
                        break;
 
 
                case AX25_STATE_2:
                case AX25_STATE_2:
                        if (ax25->n2count == ax25->n2) {
                        if (ax25->n2count == ax25->n2) {
                                ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
                                ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
                                ax25_disconnect(ax25, ETIMEDOUT);
                                ax25_disconnect(ax25, ETIMEDOUT);
                                return;
                                return;
                        } else {
                        } else {
                                ax25->n2count++;
                                ax25->n2count++;
                                ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
                                ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
                        }
                        }
                        break;
                        break;
 
 
                case AX25_STATE_3:
                case AX25_STATE_3:
                        ax25->n2count = 1;
                        ax25->n2count = 1;
                        ax25_std_transmit_enquiry(ax25);
                        ax25_std_transmit_enquiry(ax25);
                        ax25->state   = AX25_STATE_4;
                        ax25->state   = AX25_STATE_4;
                        break;
                        break;
 
 
                case AX25_STATE_4:
                case AX25_STATE_4:
                        if (ax25->n2count == ax25->n2) {
                        if (ax25->n2count == ax25->n2) {
                                ax25_send_control(ax25, AX25_DM, AX25_POLLON, AX25_RESPONSE);
                                ax25_send_control(ax25, AX25_DM, AX25_POLLON, AX25_RESPONSE);
                                ax25_disconnect(ax25, ETIMEDOUT);
                                ax25_disconnect(ax25, ETIMEDOUT);
                                return;
                                return;
                        } else {
                        } else {
                                ax25->n2count++;
                                ax25->n2count++;
                                ax25_std_transmit_enquiry(ax25);
                                ax25_std_transmit_enquiry(ax25);
                        }
                        }
                        break;
                        break;
        }
        }
 
 
        ax25_calculate_t1(ax25);
        ax25_calculate_t1(ax25);
        ax25_start_t1timer(ax25);
        ax25_start_t1timer(ax25);
}
}
 
 

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