1 /* 2 * IEEE 802.1Q Multiple VLAN Registration Protocol (MVRP) 3 * 4 * Copyright (c) 2012 Massachusetts Institute of Technology 5 * 6 * Adapted from code in net/8021q/vlan_gvrp.c 7 * Copyright (c) 2008 Patrick McHardy <kaber@trash.net> 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * version 2 as published by the Free Software Foundation. 12 */ 13 #include <linux/types.h> 14 #include <linux/if_ether.h> 15 #include <linux/if_vlan.h> 16 #include <net/mrp.h> 17 #include "vlan.h" 18 19 #define MRP_MVRP_ADDRESS { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x21 } 20 21 enum mvrp_attributes { 22 MVRP_ATTR_INVALID, 23 MVRP_ATTR_VID, 24 __MVRP_ATTR_MAX 25 }; 26 #define MVRP_ATTR_MAX (__MVRP_ATTR_MAX - 1) 27 28 static struct mrp_application vlan_mrp_app __read_mostly = { 29 .type = MRP_APPLICATION_MVRP, 30 .maxattr = MVRP_ATTR_MAX, 31 .pkttype.type = htons(ETH_P_MVRP), 32 .group_address = MRP_MVRP_ADDRESS, 33 .version = 0, 34 }; 35 36 int vlan_mvrp_request_join(const struct net_device *dev) 37 { 38 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 39 __be16 vlan_id = htons(vlan->vlan_id); 40 41 if (vlan->vlan_proto != htons(ETH_P_8021Q)) 42 return 0; 43 return mrp_request_join(vlan->real_dev, &vlan_mrp_app, 44 &vlan_id, sizeof(vlan_id), MVRP_ATTR_VID); 45 } 46 47 void vlan_mvrp_request_leave(const struct net_device *dev) 48 { 49 const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); 50 __be16 vlan_id = htons(vlan->vlan_id); 51 52 if (vlan->vlan_proto != htons(ETH_P_8021Q)) 53 return; 54 mrp_request_leave(vlan->real_dev, &vlan_mrp_app, 55 &vlan_id, sizeof(vlan_id), MVRP_ATTR_VID); 56 } 57 58 int vlan_mvrp_init_applicant(struct net_device *dev) 59 { 60 return mrp_init_applicant(dev, &vlan_mrp_app); 61 } 62 63 void vlan_mvrp_uninit_applicant(struct net_device *dev) 64 { 65 mrp_uninit_applicant(dev, &vlan_mrp_app); 66 } 67 68 int __init vlan_mvrp_init(void) 69 { 70 return mrp_register_application(&vlan_mrp_app); 71 } 72 73 void vlan_mvrp_uninit(void) 74 { 75 mrp_unregister_application(&vlan_mrp_app); 76 } 77