LXR linux/net/8021q/vlan

   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