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2874c5fd28
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>
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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*
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* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
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*/
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/in.h>
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#include <linux/kernel.h>
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#include <linux/timer.h>
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#include <linux/string.h>
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#include <linux/sockios.h>
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#include <linux/net.h>
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#include <net/ax25.h>
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#include <linux/inet.h>
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#include <linux/netdevice.h>
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#include <linux/skbuff.h>
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#include <net/sock.h>
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#include <linux/uaccess.h>
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#include <linux/fcntl.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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/*
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* The following routines are taken from page 170 of the 7th ARRL Computer
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* Networking Conference paper, as is the whole state machine.
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*/
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void ax25_std_nr_error_recovery(ax25_cb *ax25)
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{
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ax25_std_establish_data_link(ax25);
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}
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void ax25_std_establish_data_link(ax25_cb *ax25)
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{
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ax25->condition = 0x00;
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ax25->n2count = 0;
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if (ax25->modulus == AX25_MODULUS)
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ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
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else
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ax25_send_control(ax25, AX25_SABME, AX25_POLLON, AX25_COMMAND);
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ax25_calculate_t1(ax25);
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ax25_stop_idletimer(ax25);
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ax25_stop_t3timer(ax25);
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ax25_stop_t2timer(ax25);
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ax25_start_t1timer(ax25);
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}
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void ax25_std_transmit_enquiry(ax25_cb *ax25)
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{
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if (ax25->condition & AX25_COND_OWN_RX_BUSY)
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ax25_send_control(ax25, AX25_RNR, AX25_POLLON, AX25_COMMAND);
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else
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ax25_send_control(ax25, AX25_RR, AX25_POLLON, AX25_COMMAND);
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ax25->condition &= ~AX25_COND_ACK_PENDING;
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ax25_calculate_t1(ax25);
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ax25_start_t1timer(ax25);
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}
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void ax25_std_enquiry_response(ax25_cb *ax25)
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{
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if (ax25->condition & AX25_COND_OWN_RX_BUSY)
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ax25_send_control(ax25, AX25_RNR, AX25_POLLON, AX25_RESPONSE);
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else
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ax25_send_control(ax25, AX25_RR, AX25_POLLON, AX25_RESPONSE);
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ax25->condition &= ~AX25_COND_ACK_PENDING;
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}
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void ax25_std_timeout_response(ax25_cb *ax25)
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{
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if (ax25->condition & AX25_COND_OWN_RX_BUSY)
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ax25_send_control(ax25, AX25_RNR, AX25_POLLOFF, AX25_RESPONSE);
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else
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ax25_send_control(ax25, AX25_RR, AX25_POLLOFF, AX25_RESPONSE);
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ax25->condition &= ~AX25_COND_ACK_PENDING;
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}
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