linux-stable/net/ax25/ax25_std_subr.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
Based on 1 normalized pattern(s):

  this program 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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

83 lines
2.1 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
*/
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.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 <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
/*
* The following routines are taken from page 170 of the 7th ARRL Computer
* Networking Conference paper, as is the whole state machine.
*/
void ax25_std_nr_error_recovery(ax25_cb *ax25)
{
ax25_std_establish_data_link(ax25);
}
void ax25_std_establish_data_link(ax25_cb *ax25)
{
ax25->condition = 0x00;
ax25->n2count = 0;
if (ax25->modulus == AX25_MODULUS)
ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
else
ax25_send_control(ax25, AX25_SABME, AX25_POLLON, AX25_COMMAND);
ax25_calculate_t1(ax25);
ax25_stop_idletimer(ax25);
ax25_stop_t3timer(ax25);
ax25_stop_t2timer(ax25);
ax25_start_t1timer(ax25);
}
void ax25_std_transmit_enquiry(ax25_cb *ax25)
{
if (ax25->condition & AX25_COND_OWN_RX_BUSY)
ax25_send_control(ax25, AX25_RNR, AX25_POLLON, AX25_COMMAND);
else
ax25_send_control(ax25, AX25_RR, AX25_POLLON, AX25_COMMAND);
ax25->condition &= ~AX25_COND_ACK_PENDING;
ax25_calculate_t1(ax25);
ax25_start_t1timer(ax25);
}
void ax25_std_enquiry_response(ax25_cb *ax25)
{
if (ax25->condition & AX25_COND_OWN_RX_BUSY)
ax25_send_control(ax25, AX25_RNR, AX25_POLLON, AX25_RESPONSE);
else
ax25_send_control(ax25, AX25_RR, AX25_POLLON, AX25_RESPONSE);
ax25->condition &= ~AX25_COND_ACK_PENDING;
}
void ax25_std_timeout_response(ax25_cb *ax25)
{
if (ax25->condition & AX25_COND_OWN_RX_BUSY)
ax25_send_control(ax25, AX25_RNR, AX25_POLLOFF, AX25_RESPONSE);
else
ax25_send_control(ax25, AX25_RR, AX25_POLLOFF, AX25_RESPONSE);
ax25->condition &= ~AX25_COND_ACK_PENDING;
}