net/8021q/vlan_gvrp.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  *  IEEE 802.1Q GARP VLAN Registration Protocol (GVRP)
0004  *
0005  *  Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
0006  */
0007 #include <linux/types.h>
0008 #include <linux/if_vlan.h>
0009 #include <net/garp.h>
0010 #include "vlan.h"
0011
0012 #define GARP_GVRP_ADDRESS   { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x21 }
0013
0014 enum gvrp_attributes {
0015     GVRP_ATTR_INVALID,
0016     GVRP_ATTR_VID,
0017     __GVRP_ATTR_MAX
0018 };
0019 #define GVRP_ATTR_MAX   (__GVRP_ATTR_MAX - 1)
0020
0021 static struct garp_application vlan_gvrp_app __read_mostly = {
0022     .proto.group_address    = GARP_GVRP_ADDRESS,
0023     .maxattr        = GVRP_ATTR_MAX,
0024     .type           = GARP_APPLICATION_GVRP,
0025 };
0026
0027 int vlan_gvrp_request_join(const struct net_device *dev)
0028 {
0029     const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
0030     __be16 vlan_id = htons(vlan->vlan_id);
0031
0032     if (vlan->vlan_proto != htons(ETH_P_8021Q))
0033         return 0;
0034     return garp_request_join(vlan->real_dev, &vlan_gvrp_app,
0035                  &vlan_id, sizeof(vlan_id), GVRP_ATTR_VID);
0036 }
0037
0038 void vlan_gvrp_request_leave(const struct net_device *dev)
0039 {
0040     const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
0041     __be16 vlan_id = htons(vlan->vlan_id);
0042
0043     if (vlan->vlan_proto != htons(ETH_P_8021Q))
0044         return;
0045     garp_request_leave(vlan->real_dev, &vlan_gvrp_app,
0046                &vlan_id, sizeof(vlan_id), GVRP_ATTR_VID);
0047 }
0048
0049 int vlan_gvrp_init_applicant(struct net_device *dev)
0050 {
0051     return garp_init_applicant(dev, &vlan_gvrp_app);
0052 }
0053
0054 void vlan_gvrp_uninit_applicant(struct net_device *dev)
0055 {
0056     garp_uninit_applicant(dev, &vlan_gvrp_app);
0057 }
0058
0059 int __init vlan_gvrp_init(void)
0060 {
0061     return garp_register_application(&vlan_gvrp_app);
0062 }
0063
0064 void vlan_gvrp_uninit(void)
0065 {
0066     garp_unregister_application(&vlan_gvrp_app);
0067 }