1 /* 2 * Fundamental constants relating to 802.3 3 * 4 * Copyright (C) 2020, Broadcom. 5 * 6 * Unless you and Broadcom execute a separate written software license 7 * agreement governing use of this software, this software is licensed to you 8 * under the terms of the GNU General Public License version 2 (the "GPL"), 9 * available at http://www.broadcom.com/licenses/GPLv2.php, with the 10 * following added to such license: 11 * 12 * As a special exception, the copyright holders of this software give you 13 * permission to link this software with independent modules, and to copy and 14 * distribute the resulting executable under terms of your choice, provided that 15 * you also meet, for each linked independent module, the terms and conditions of 16 * the license of that module. An independent module is a module which is not 17 * derived from this software. The special exception does not apply to any 18 * modifications of the software. 19 * 20 * 21 * <<Broadcom-WL-IPTag/Dual:>> 22 */ 23 24 #ifndef _802_3_h_ 25 #define _802_3_h_ 26 27 /* This marks the start of a packed structure section. */ 28 #include <packed_section_start.h> 29 30 #define SNAP_HDR_LEN 6 /* 802.3 SNAP header length */ 31 #define DOT3_OUI_LEN 3 /* 802.3 oui length */ 32 33 BWL_PRE_PACKED_STRUCT struct dot3_mac_llc_snap_header { 34 uint8 ether_dhost[ETHER_ADDR_LEN]; /* dest mac */ 35 uint8 ether_shost[ETHER_ADDR_LEN]; /* src mac */ 36 uint16 length; /* frame length incl header */ 37 uint8 dsap; /* always 0xAA */ 38 uint8 ssap; /* always 0xAA */ 39 uint8 ctl; /* always 0x03 */ 40 uint8 oui[DOT3_OUI_LEN]; /* RFC1042: 0x00 0x00 0x00 41 * Bridge-Tunnel: 0x00 0x00 0xF8 42 */ 43 uint16 type; /* ethertype */ 44 } BWL_POST_PACKED_STRUCT; 45 46 /* This marks the end of a packed structure section. */ 47 #include <packed_section_end.h> 48 49 #endif /* #ifndef _802_3_h_ */ 50