cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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vlan_gvrp.c (1637B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * 	IEEE 802.1Q GARP VLAN Registration Protocol (GVRP)
      4 *
      5 * 	Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
      6 */
      7#include <linux/types.h>
      8#include <linux/if_vlan.h>
      9#include <net/garp.h>
     10#include "vlan.h"
     11
     12#define GARP_GVRP_ADDRESS	{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x21 }
     13
     14enum gvrp_attributes {
     15	GVRP_ATTR_INVALID,
     16	GVRP_ATTR_VID,
     17	__GVRP_ATTR_MAX
     18};
     19#define GVRP_ATTR_MAX	(__GVRP_ATTR_MAX - 1)
     20
     21static struct garp_application vlan_gvrp_app __read_mostly = {
     22	.proto.group_address	= GARP_GVRP_ADDRESS,
     23	.maxattr		= GVRP_ATTR_MAX,
     24	.type			= GARP_APPLICATION_GVRP,
     25};
     26
     27int vlan_gvrp_request_join(const struct net_device *dev)
     28{
     29	const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
     30	__be16 vlan_id = htons(vlan->vlan_id);
     31
     32	if (vlan->vlan_proto != htons(ETH_P_8021Q))
     33		return 0;
     34	return garp_request_join(vlan->real_dev, &vlan_gvrp_app,
     35				 &vlan_id, sizeof(vlan_id), GVRP_ATTR_VID);
     36}
     37
     38void vlan_gvrp_request_leave(const struct net_device *dev)
     39{
     40	const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
     41	__be16 vlan_id = htons(vlan->vlan_id);
     42
     43	if (vlan->vlan_proto != htons(ETH_P_8021Q))
     44		return;
     45	garp_request_leave(vlan->real_dev, &vlan_gvrp_app,
     46			   &vlan_id, sizeof(vlan_id), GVRP_ATTR_VID);
     47}
     48
     49int vlan_gvrp_init_applicant(struct net_device *dev)
     50{
     51	return garp_init_applicant(dev, &vlan_gvrp_app);
     52}
     53
     54void vlan_gvrp_uninit_applicant(struct net_device *dev)
     55{
     56	garp_uninit_applicant(dev, &vlan_gvrp_app);
     57}
     58
     59int __init vlan_gvrp_init(void)
     60{
     61	return garp_register_application(&vlan_gvrp_app);
     62}
     63
     64void vlan_gvrp_uninit(void)
     65{
     66	garp_unregister_application(&vlan_gvrp_app);
     67}