release/src-rt-6.x/include/proto/vlan.h

   1 /*
   2  * 802.1Q VLAN protocol definitions
   3  *
   4  * Copyright (C) 2012, Broadcom Corporation. All Rights Reserved.
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  13  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  15  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  16  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  *
  18  * $Id: vlan.h 345182 2012-07-16 23:31:56Z $
  19  */
  20
  21 #ifndef _vlan_h_
  22 #define _vlan_h_
  23
  24 #ifndef _TYPEDEFS_H_
  25 #include <typedefs.h>
  26 #endif
  27
  28 /* This marks the start of a packed structure section. */
  29 #include <packed_section_start.h>
  30
  31 #ifndef  VLAN_VID_MASK
  32 #define VLAN_VID_MASK           0xfff   /* low 12 bits are vlan id */
  33 #endif
  34
  35 #define VLAN_CFI_SHIFT          12      /* canonical format indicator bit */
  36 #define VLAN_PRI_SHIFT          13      /* user priority */
  37
  38 #define VLAN_PRI_MASK           7       /* 3 bits of priority */
  39
  40 #define VLAN_TPID_OFFSET        12      /* offset of tag protocol id field */
  41 #define VLAN_TCI_OFFSET         14      /* offset of tag ctrl info field */
  42
  43 #define VLAN_TAG_LEN            4
  44 #define VLAN_TAG_OFFSET         (2 * ETHER_ADDR_LEN)    /* offset in Ethernet II packet only */
  45
  46 #define VLAN_TPID               0x8100  /* VLAN ethertype/Tag Protocol ID */
  47
  48 struct vlan_header {
  49         uint16  vlan_type;              /* 0x8100 */
  50         uint16  vlan_tag;               /* priority, cfi and vid */
  51 };
  52
  53 struct ethervlan_header {
  54         uint8   ether_dhost[ETHER_ADDR_LEN];
  55         uint8   ether_shost[ETHER_ADDR_LEN];
  56         uint16  vlan_type;              /* 0x8100 */
  57         uint16  vlan_tag;               /* priority, cfi and vid */
  58         uint16  ether_type;
  59 };
  60
  61 #define ETHERVLAN_HDR_LEN       (ETHER_HDR_LEN + VLAN_TAG_LEN)
  62
  63
  64 /* This marks the end of a packed structure section. */
  65 #include <packed_section_end.h>
  66
  67 #define ETHERVLAN_MOVE_HDR(d, s) \
  68 do { \
  69         struct ethervlan_header t; \
  70         t = *(struct ethervlan_header *)(s); \
  71         *(struct ethervlan_header *)(d) = t; \
  72 } while (0)
  73
  74 #endif /* _vlan_h_ */