xref: /openbmc/linux/net/8021q/vlan_gvrp.c (revision ca55b2fe)
1 /*
2  * 	IEEE 802.1Q GARP VLAN Registration Protocol (GVRP)
3  *
4  * 	Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
5  *
6  *	This program is free software; you can redistribute it and/or
7  *	modify it under the terms of the GNU General Public License
8  *	version 2 as published by the Free Software Foundation.
9  */
10 #include <linux/types.h>
11 #include <linux/if_vlan.h>
12 #include <net/garp.h>
13 #include "vlan.h"
14 
15 #define GARP_GVRP_ADDRESS	{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x21 }
16 
17 enum gvrp_attributes {
18 	GVRP_ATTR_INVALID,
19 	GVRP_ATTR_VID,
20 	__GVRP_ATTR_MAX
21 };
22 #define GVRP_ATTR_MAX	(__GVRP_ATTR_MAX - 1)
23 
24 static struct garp_application vlan_gvrp_app __read_mostly = {
25 	.proto.group_address	= GARP_GVRP_ADDRESS,
26 	.maxattr		= GVRP_ATTR_MAX,
27 	.type			= GARP_APPLICATION_GVRP,
28 };
29 
30 int vlan_gvrp_request_join(const struct net_device *dev)
31 {
32 	const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
33 	__be16 vlan_id = htons(vlan->vlan_id);
34 
35 	if (vlan->vlan_proto != htons(ETH_P_8021Q))
36 		return 0;
37 	return garp_request_join(vlan->real_dev, &vlan_gvrp_app,
38 				 &vlan_id, sizeof(vlan_id), GVRP_ATTR_VID);
39 }
40 
41 void vlan_gvrp_request_leave(const struct net_device *dev)
42 {
43 	const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
44 	__be16 vlan_id = htons(vlan->vlan_id);
45 
46 	if (vlan->vlan_proto != htons(ETH_P_8021Q))
47 		return;
48 	garp_request_leave(vlan->real_dev, &vlan_gvrp_app,
49 			   &vlan_id, sizeof(vlan_id), GVRP_ATTR_VID);
50 }
51 
52 int vlan_gvrp_init_applicant(struct net_device *dev)
53 {
54 	return garp_init_applicant(dev, &vlan_gvrp_app);
55 }
56 
57 void vlan_gvrp_uninit_applicant(struct net_device *dev)
58 {
59 	garp_uninit_applicant(dev, &vlan_gvrp_app);
60 }
61 
62 int __init vlan_gvrp_init(void)
63 {
64 	return garp_register_application(&vlan_gvrp_app);
65 }
66 
67 void vlan_gvrp_uninit(void)
68 {
69 	garp_unregister_application(&vlan_gvrp_app);
70 }
71