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