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 #include <sys/ethernet.h> 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 /* 37 * The offset in bytes, in a VLAN tagged packet, from the 38 * ethernet header ethertype (which is ETHERTYPE_VLAN) to 39 * the encapsulated ethertype. 40 */ 41 #define ENCAP_ETHERTYPE_OFF (offsetof(struct ether_vlan_header, ether_type) -\ 42 offsetof(struct ether_vlan_header, ether_tpid)) 43 44 /* 45 * The offset in bytes, from the beginning of an ethernet header, 46 * to the VLAN ID. 47 */ 48 #define VLAN_ID_OFFSET (offsetof(struct ether_vlan_header, ether_tci) -\ 49 offsetof(struct ether_vlan_header, ether_dhost)) 50 51 #ifdef __cplusplus 52 } 53 #endif 54 55 #endif /* _SNOOP_VLAN_H */ 56