/*
 * 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.
 *
 * 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;
}
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=cbf2f8a99a2337894c3592c9ac2170e8c1f8f73f'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation?id=cbf2f8a99a2337894c3592c9ac2170e8c1f8f73f'>Documentation</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree?id=cbf2f8a99a2337894c3592c9ac2170e8c1f8f73f'>devicetree</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='cbf2f8a99a2337894c3592c9ac2170e8c1f8f73f'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2016-09-05 17:14:17 +0200</td></tr>
<tr><th>committer</th><td>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2016-09-05 17:14:17 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree?id=cbf2f8a99a2337894c3592c9ac2170e8c1f8f73f'>cbf2f8a99a2337894c3592c9ac2170e8c1f8f73f</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation/devicetree?id=cbf2f8a99a2337894c3592c9ac2170e8c1f8f73f'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=cbf2f8a99a2337894c3592c9ac2170e8c1f8f73f'>c018fb3826ea8492641be62c2f3162fb67f5aa0e</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation/devicetree?id=cbf2f8a99a2337894c3592c9ac2170e8c1f8f73f'>Documentation/devicetree</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree?id=fa8410b355251fd30341662a40ac6b22d3e38468'>fa8410b355251fd30341662a40ac6b22d3e38468</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/devicetree?id=cbf2f8a99a2337894c3592c9ac2170e8c1f8f73f&amp;id2=fa8410b355251fd30341662a40ac6b22d3e38468'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree?id=d64934019f6cc39202e2f78063709f61ca5cb364'>d64934019f6cc39202e2f78063709f61ca5cb364</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/devicetree?id=cbf2f8a99a2337894c3592c9ac2170e8c1f8f73f&amp;id2=d64934019f6cc39202e2f78063709f61ca5cb364'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into efi/urgent</div><div class='commit-msg'> * Make for_each_efi_memory_desc_in_map() safe on Xen and prevent an
   infinte loop - Jan Beulich

 * Fix boot error on arm64 Qualcomm platforms by refactoring and
   improving the ExitBootServices() hack we already for x86 and moving
   it to the libstub - Jeffrey Hugo

 * Use correct return data type for of_get_flat_dt_subnode_by_name()
   so that we correctly handle errors - Andrzej Hajda
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=cbf2f8a99a2337894c3592c9ac2170e8c1f8f73f'>Diffstat</a> (limited to 'Documentation/devicetree')</div><table summary='diffstat' class='diffstat'>