linux/net/8021q/vlan_gvrp.c
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   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        return garp_request_join(vlan->real_dev, &vlan_gvrp_app,
  36                                 &vlan_id, sizeof(vlan_id), GVRP_ATTR_VID);
  37}
  38
  39void vlan_gvrp_request_leave(const struct net_device *dev)
  40{
  41        const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
  42        __be16 vlan_id = htons(vlan->vlan_id);
  43
  44        garp_request_leave(vlan->real_dev, &vlan_gvrp_app,
  45                           &vlan_id, sizeof(vlan_id), GVRP_ATTR_VID);
  46}
  47
  48int vlan_gvrp_init_applicant(struct net_device *dev)
  49{
  50        return garp_init_applicant(dev, &vlan_gvrp_app);
  51}
  52
  53void vlan_gvrp_uninit_applicant(struct net_device *dev)
  54{
  55        garp_uninit_applicant(dev, &vlan_gvrp_app);
  56}
  57
  58int __init vlan_gvrp_init(void)
  59{
  60        return garp_register_application(&vlan_gvrp_app);
  61}
  62
  63void vlan_gvrp_uninit(void)
  64{
  65        garp_unregister_application(&vlan_gvrp_app);
  66}
  67
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