openwrt/package/wificonf/include/proto/vlan.h

   1 /*
   2  * 802.1Q VLAN protocol definitions
   3  *
   4  * Copyright 2005, Broadcom Corporation
   5  * All Rights Reserved.
   6  *
   7  * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
   8  * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
   9  * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
  10  * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
  11  *
  12  * $Id$
  13  */
  14
  15 #ifndef _vlan_h_
  16 #define _vlan_h_
  17
  18 /* enable structure packing */
  19 #if defined(__GNUC__)
  20 #define PACKED  __attribute__((packed))
  21 #else
  22 #pragma pack(1)
  23 #define PACKED
  24 #endif
  25
  26 #define VLAN_VID_MASK           0xfff   /* low 12 bits are vlan id */
  27 #define VLAN_CFI_SHIFT          12      /* canonical format indicator bit */
  28 #define VLAN_PRI_SHIFT          13      /* user priority */
  29
  30 #define VLAN_PRI_MASK           7       /* 3 bits of priority */
  31
  32 #define VLAN_TAG_LEN            4
  33 #define VLAN_TAG_OFFSET         (2 * ETHER_ADDR_LEN)
  34
  35 struct ethervlan_header {
  36         uint8   ether_dhost[ETHER_ADDR_LEN];
  37         uint8   ether_shost[ETHER_ADDR_LEN];
  38         uint16  vlan_type;              /* 0x8100 */
  39         uint16  vlan_tag;               /* priority, cfi and vid */
  40         uint16  ether_type;
  41 };
  42
  43 #define ETHERVLAN_HDR_LEN       (ETHER_HDR_LEN + VLAN_TAG_LEN)
  44
  45 #undef PACKED
  46 #if !defined(__GNUC__)
  47 #pragma pack()
  48 #endif
  49
  50 #endif /* _vlan_h_ */