1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * IEEE 802.1Q GARP VLAN Registration Protocol (GVRP)
4 *
5 * Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
6 */
7 #include <linux/types.h>
8 #include <linux/if_vlan.h>
9 #include <net/garp.h>
10 #include "vlan.h"
11
12 #define GARP_GVRP_ADDRESS { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x21 }
13
14 enum gvrp_attributes {
15 GVRP_ATTR_INVALID,
16 GVRP_ATTR_VID,
17 __GVRP_ATTR_MAX
18 };
19 #define GVRP_ATTR_MAX (__GVRP_ATTR_MAX - 1)
20
21 static struct garp_application vlan_gvrp_app __read_mostly = {
22 .proto.group_address = GARP_GVRP_ADDRESS,
23 .maxattr = GVRP_ATTR_MAX,
24 .type = GARP_APPLICATION_GVRP,
25 };
26
27 int vlan_gvrp_request_join(const struct net_device *dev)
28 {
29 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
30 __be16 vlan_id = htons(vlan->vlan_id);
31
32 if (vlan->vlan_proto != htons(ETH_P_8021Q))
33 return 0;
34 return garp_request_join(vlan->real_dev, &vlan_gvrp_app,
35 &vlan_id, sizeof(vlan_id), GVRP_ATTR_VID);
36 }
37
38 void vlan_gvrp_request_leave(const struct net_device *dev)
39 {
40 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
41 __be16 vlan_id = htons(vlan->vlan_id);
42
43 if (vlan->vlan_proto != htons(ETH_P_8021Q))
44 return;
45 garp_request_leave(vlan->real_dev, &vlan_gvrp_app,
46 &vlan_id, sizeof(vlan_id), GVRP_ATTR_VID);
47 }
48
49 int vlan_gvrp_init_applicant(struct net_device *dev)
50 {
51 return garp_init_applicant(dev, &vlan_gvrp_app);
52 }
53
54 void vlan_gvrp_uninit_applicant(struct net_device *dev)
55 {
56 garp_uninit_applicant(dev, &vlan_gvrp_app);
57 }
58
59 int __init vlan_gvrp_init(void)
60 {
61 return garp_register_application(&vlan_gvrp_app);
62 }
63
64 void vlan_gvrp_uninit(void)
65 {
66 garp_unregister_application(&vlan_gvrp_app);
67 }
68
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