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