1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Fundamental constants relating to 802.3 4 * 5 * Copyright (C) 1999-2019, Broadcom. 6 * 7 * Unless you and Broadcom execute a separate written software license 8 * agreement governing use of this software, this software is licensed to you 9 * under the terms of the GNU General Public License version 2 (the "GPL"), 10 * available at http://www.broadcom.com/licenses/GPLv2.php, with the 11 * following added to such license: 12 * 13 * As a special exception, the copyright holders of this software give you 14 * permission to link this software with independent modules, and to copy and 15 * distribute the resulting executable under terms of your choice, provided that 16 * you also meet, for each linked independent module, the terms and conditions of 17 * the license of that module. An independent module is a module which is not 18 * derived from this software. The special exception does not apply to any 19 * modifications of the software. 20 * 21 * Notwithstanding the above, under no circumstances may you combine this 22 * software in any way with any other Broadcom software provided under a license 23 * other than the GPL, without Broadcom's express prior written consent. 24 * 25 * 26 * <<Broadcom-WL-IPTag/Open:>> 27 * 28 * $Id: 802.3.h 700076 2017-05-17 14:42:22Z $ 29 */ 30 31 #ifndef _802_3_h_ 32 #define _802_3_h_ 33 34 /* This marks the start of a packed structure section. */ 35 #include <packed_section_start.h> 36 37 #define SNAP_HDR_LEN 6 /* 802.3 SNAP header length */ 38 #define DOT3_OUI_LEN 3 /* 802.3 oui length */ 39 40 BWL_PRE_PACKED_STRUCT struct dot3_mac_llc_snap_header { 41 uint8 ether_dhost[ETHER_ADDR_LEN]; /* dest mac */ 42 uint8 ether_shost[ETHER_ADDR_LEN]; /* src mac */ 43 uint16 length; /* frame length incl header */ 44 uint8 dsap; /* always 0xAA */ 45 uint8 ssap; /* always 0xAA */ 46 uint8 ctl; /* always 0x03 */ 47 uint8 oui[DOT3_OUI_LEN]; /* RFC1042: 0x00 0x00 0x00 48 * Bridge-Tunnel: 0x00 0x00 0xF8 49 */ 50 uint16 type; /* ethertype */ 51 } BWL_POST_PACKED_STRUCT; 52 53 /* This marks the end of a packed structure section. */ 54 #include <packed_section_end.h> 55 56 #endif /* #ifndef _802_3_h_ */ 57