vlan_gvrp.c

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/*
 *  IEEE 802.1Q GARP VLAN Registration Protocol (GVRP)
 *
 *  Copyright (c) 2008 Patrick McHardy <[email protected]>
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  version 2 as published by the Free Software Foundation.
 */
#include <linux/types.h>
#include <linux/if_vlan.h>
#include <net/garp.h>
#include "vlan.h"

#define GARP_GVRP_ADDRESS   { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x21 }

enum gvrp_attributes {
    GVRP_ATTR_INVALID,
    GVRP_ATTR_VID,
    __GVRP_ATTR_MAX
};
#define GVRP_ATTR_MAX   (__GVRP_ATTR_MAX - 1)

static struct garp_application vlan_gvrp_app __read_mostly = {
    .proto.group_address    = GARP_GVRP_ADDRESS,
    .maxattr        = GVRP_ATTR_MAX,
    .type           = GARP_APPLICATION_GVRP,
};

int vlan_gvrp_request_join(const struct net_device *dev)
{
    const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
    __be16 vlan_id = htons(vlan->vlan_id);

    return garp_request_join(vlan->real_dev, &vlan_gvrp_app,
                 &vlan_id, sizeof(vlan_id), GVRP_ATTR_VID);
}

void vlan_gvrp_request_leave(const struct net_device *dev)
{
    const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
    __be16 vlan_id = htons(vlan->vlan_id);

    garp_request_leave(vlan->real_dev, &vlan_gvrp_app,
               &vlan_id, sizeof(vlan_id), GVRP_ATTR_VID);
}

int vlan_gvrp_init_applicant(struct net_device *dev)
{
    return garp_init_applicant(dev, &vlan_gvrp_app);
}

void vlan_gvrp_uninit_applicant(struct net_device *dev)
{
    garp_uninit_applicant(dev, &vlan_gvrp_app);
}

int __init vlan_gvrp_init(void)
{
    return garp_register_application(&vlan_gvrp_app);
}

void vlan_gvrp_uninit(void)
{
    garp_unregister_application(&vlan_gvrp_app);
}