1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * IEEE 802.1Q Multiple VLAN Registration Protocol (MVRP) |
4 | * |
5 | * Copyright (c) 2012 Massachusetts Institute of Technology |
6 | * |
7 | * Adapted from code in net/8021q/vlan_gvrp.c |
8 | * Copyright (c) 2008 Patrick McHardy <kaber@trash.net> |
9 | */ |
10 | #include <linux/types.h> |
11 | #include <linux/if_ether.h> |
12 | #include <linux/if_vlan.h> |
13 | #include <net/mrp.h> |
14 | #include "vlan.h" |
15 | |
16 | #define MRP_MVRP_ADDRESS { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x21 } |
17 | |
18 | enum mvrp_attributes { |
19 | MVRP_ATTR_INVALID, |
20 | MVRP_ATTR_VID, |
21 | __MVRP_ATTR_MAX |
22 | }; |
23 | #define MVRP_ATTR_MAX (__MVRP_ATTR_MAX - 1) |
24 | |
25 | static struct mrp_application vlan_mrp_app __read_mostly = { |
26 | .type = MRP_APPLICATION_MVRP, |
27 | .maxattr = MVRP_ATTR_MAX, |
28 | .pkttype.type = htons(ETH_P_MVRP), |
29 | .group_address = MRP_MVRP_ADDRESS, |
30 | .version = 0, |
31 | }; |
32 | |
33 | int vlan_mvrp_request_join(const struct net_device *dev) |
34 | { |
35 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
36 | __be16 vlan_id = htons(vlan->vlan_id); |
37 | |
38 | if (vlan->vlan_proto != htons(ETH_P_8021Q)) |
39 | return 0; |
40 | return mrp_request_join(dev: vlan->real_dev, app: &vlan_mrp_app, |
41 | value: &vlan_id, len: sizeof(vlan_id), type: MVRP_ATTR_VID); |
42 | } |
43 | |
44 | void vlan_mvrp_request_leave(const struct net_device *dev) |
45 | { |
46 | const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
47 | __be16 vlan_id = htons(vlan->vlan_id); |
48 | |
49 | if (vlan->vlan_proto != htons(ETH_P_8021Q)) |
50 | return; |
51 | mrp_request_leave(dev: vlan->real_dev, app: &vlan_mrp_app, |
52 | value: &vlan_id, len: sizeof(vlan_id), type: MVRP_ATTR_VID); |
53 | } |
54 | |
55 | int vlan_mvrp_init_applicant(struct net_device *dev) |
56 | { |
57 | return mrp_init_applicant(dev, app: &vlan_mrp_app); |
58 | } |
59 | |
60 | void vlan_mvrp_uninit_applicant(struct net_device *dev) |
61 | { |
62 | mrp_uninit_applicant(dev, app: &vlan_mrp_app); |
63 | } |
64 | |
65 | int __init vlan_mvrp_init(void) |
66 | { |
67 | return mrp_register_application(app: &vlan_mrp_app); |
68 | } |
69 | |
70 | void vlan_mvrp_uninit(void) |
71 | { |
72 | mrp_unregister_application(app: &vlan_mrp_app); |
73 | } |
74 | |