usr/src/cmd/cmd-inet/usr.sbin/snoop/snoop_vlan.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _SNOOP_VLAN_H
  28 #define _SNOOP_VLAN_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #include <sys/ethernet.h>
  33
  34 #ifdef __cplusplus
  35 extern "C" {
  36 #endif
  37
  38 /*
  39  * The offset in bytes, in a VLAN tagged packet, from the
  40  * ethernet header ethertype (which is ETHERTYPE_VLAN) to
  41  * the encapsulated ethertype.
  42  */
  43 #define ENCAP_ETHERTYPE_OFF (offsetof(struct ether_vlan_header, ether_type) -\
  44             offsetof(struct ether_vlan_header, ether_tpid))
  45
  46 /*
  47  * The offset in bytes, from the beginning of an ethernet header,
  48  * to the VLAN ID.
  49  */
  50 #define VLAN_ID_OFFSET (offsetof(struct ether_vlan_header, ether_tci) -\
  51             offsetof(struct ether_vlan_header, ether_dhost))
  52
  53 #ifdef __cplusplus
  54 }
  55 #endif
  56
  57 #endif /* _SNOOP_VLAN_H */