/*
 * 	IEEE 802.1Q GARP VLAN Registration Protocol (GVRP)
 *
 * 	Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License
 *	version 2 as published by the Free Software Foundation.
 */
#include <linux/types.h>
#include <linux/if_vlan.h>
#include <net/garp.h>
#include "vlan.h"

#define GARP_GVRP_ADDRESS	{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x21 }

enum gvrp_attributes {
	GVRP_ATTR_INVALID,
	GVRP_ATTR_VID,
	__GVRP_ATTR_MAX
};
#define GVRP_ATTR_MAX	(__GVRP_ATTR_MAX - 1)

static struct garp_application vlan_gvrp_app __read_mostly = {
	.proto.group_address	= GARP_GVRP_ADDRESS,
	.maxattr		= GVRP_ATTR_MAX,
	.type			= GARP_APPLICATION_GVRP,
};

int vlan_gvrp_request_join(const struct net_device *dev)
{
	const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
	__be16 vlan_id = htons(vlan->vlan_id);

	if (vlan->vlan_proto != htons(ETH_P_8021Q))
		return 0;
	return garp_request_join(vlan->real_dev, &vlan_gvrp_app,
				 &vlan_id, sizeof(vlan_id), GVRP_ATTR_VID);
}

void vlan_gvrp_request_leave(const struct net_device *dev)
{
	const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
	__be16 vlan_id = htons(vlan->vlan_id);

	if (vlan->vlan_proto != htons(ETH_P_8021Q))
		return;
	garp_request_leave(vlan->real_dev, &vlan_gvrp_app,
			   &vlan_id, sizeof(vlan_id), GVRP_ATTR_VID);
}

int vlan_gvrp_init_applicant(struct net_device *dev)
{
	return garp_init_applicant(dev, &vlan_gvrp_app);
}

void vlan_gvrp_uninit_applicant(struct net_device *dev)
{
	garp_uninit_applicant(dev, &vlan_gvrp_app);
}

int __init vlan_gvrp_init(void)
{
	return garp_register_application(&vlan_gvrp_app);
}

void vlan_gvrp_uninit(void)
{
	garp_unregister_application(&vlan_gvrp_app);
}
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=09aa98ad496d6b11a698b258bc64d7f64c55d682'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/net?h=nds-private-remove&amp;id=09aa98ad496d6b11a698b258bc64d7f64c55d682'>net</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/dsa?h=nds-private-remove&amp;id=09aa98ad496d6b11a698b258bc64d7f64c55d682'>dsa</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/dsa/slave.c?h=nds-private-remove&amp;id=09aa98ad496d6b11a698b258bc64d7f64c55d682'>slave.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/net/dsa/slave.c?h=nds-private-remove&amp;id=09aa98ad496d6b11a698b258bc64d7f64c55d682&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr><td><span title='2017-02-07 13:48:22 -0500'>2017-02-07</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/dsa/slave.c?h=nds-private-remove&amp;id=e69e46261063a25c3907bed16a2e9d18b115d1fd'>net: dsa: Do not clobber PHY link outside of state machine</a></td><td>Florian Fainelli</td><td>1</td><td><span class='deletions'>-7</span>/<span class='insertions'>+3</span></td></tr>
<tr><td><span title='2017-02-06 16:53:29 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/dsa/slave.c?h=nds-private-remove&amp;id=04d3a4c6af52a58370795bc9f70dc15f51f8bb84'>net: dsa: introduce bridge notifier</a></td><td>Vivien Didelot</td><td>1</td><td><span class='deletions'>-11</span>/<span class='insertions'>+29</span></td></tr>
<tr><td><span title='2017-02-06 16:53:29 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/dsa/slave.c?h=nds-private-remove&amp;id=c5d35cb32cffa6e4c2db1cbd9a544e10a8d6fda9'>net: dsa: change state setter scope</a></td><td>Vivien Didelot</td><td>1</td><td><span class='deletions'>-6</span>/<span class='insertions'>+9</span></td></tr>
<tr><td><span title='2017-02-06 16:53:28 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/dsa/slave.c?h=nds-private-remove&amp;id=9c26542685130ef3b55cdb4e04eec0ac33376b41'>net: dsa: rollback bridging on error</a></td><td>Vivien Didelot</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+13</span></td></tr>
<tr><td><span title='2017-02-06 16:53:28 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/dsa/slave.c?h=nds-private-remove&amp;id=8e92ab3a426e04dc355b196e3b4474f633025a3b'>net: dsa: simplify netdevice events handling</a></td><td>Vivien Didelot</td><td>1</td><td><span class='deletions'>-28</span>/<span class='insertions'>+16</span></td></tr>
<tr><td><span title='2017-02-06 16:53:28 -0500'>2017-02-06</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/net/dsa/slave.c?h=nds-private-remove&amp;id=88e4f0ca4e4e7760e4aad544789c5408219886d5'>net: dsa: move netdevice notifier registration</a></td><td>Vivien Didelot</td><td>1</td><td><span class='deletions'>-2</span>/<span class='insertions'>+20</span></td></tr>