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 17enum 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 24static 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 30int 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 41void 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 52int vlan_gvrp_init_applicant(struct net_device *dev) 53{ 54 return garp_init_applicant(dev, &vlan_gvrp_app); 55} 56 57void vlan_gvrp_uninit_applicant(struct net_device *dev) 58{ 59 garp_uninit_applicant(dev, &vlan_gvrp_app); 60} 61 62int __init vlan_gvrp_init(void) 63{ 64 return garp_register_application(&vlan_gvrp_app); 65} 66 67void vlan_gvrp_uninit(void) 68{ 69 garp_unregister_application(&vlan_gvrp_app); 70} 71