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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 
 17 enum 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 
 24 static 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 
 30 int 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 
 41 void 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 
 52 int vlan_gvrp_init_applicant(struct net_device *dev)
 53 {
 54         return garp_init_applicant(dev, &vlan_gvrp_app);
 55 }
 56 
 57 void vlan_gvrp_uninit_applicant(struct net_device *dev)
 58 {
 59         garp_uninit_applicant(dev, &vlan_gvrp_app);
 60 }
 61 
 62 int __init vlan_gvrp_init(void)
 63 {
 64         return garp_register_application(&vlan_gvrp_app);
 65 }
 66 
 67 void vlan_gvrp_uninit(void)
 68 {
 69         garp_unregister_application(&vlan_gvrp_app);
 70 }
 71 

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