1 /* 2 * 802.1Q VLAN protocol definitions 3 * 4 * Copyright (C) 1999-2013, Broadcom Corporation 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 * Notwithstanding the above, under no circumstances may you combine this 21 * software in any way with any other Broadcom software provided under a license 22 * other than the GPL, without Broadcom's express prior written consent. 23 * 24 * $Id: vlan.h 382883 2013-02-04 23:26:09Z $ 25 */ 26 27 #ifndef _vlan_h_ 28 #define _vlan_h_ 29 30 #ifndef _TYPEDEFS_H_ 31 #include <typedefs.h> 32 #endif 33 34 /* This marks the start of a packed structure section. */ 35 #include <packed_section_start.h> 36 37 #ifndef VLAN_VID_MASK 38 #define VLAN_VID_MASK 0xfff /* low 12 bits are vlan id */ 39 #endif 40 41 #define VLAN_CFI_SHIFT 12 /* canonical format indicator bit */ 42 #define VLAN_PRI_SHIFT 13 /* user priority */ 43 44 #define VLAN_PRI_MASK 7 /* 3 bits of priority */ 45 46 #define VLAN_TPID_OFFSET 12 /* offset of tag protocol id field */ 47 #define VLAN_TCI_OFFSET 14 /* offset of tag ctrl info field */ 48 49 #define VLAN_TAG_LEN 4 50 #define VLAN_TAG_OFFSET (2 * ETHER_ADDR_LEN) /* offset in Ethernet II packet only */ 51 52 #define VLAN_TPID 0x8100 /* VLAN ethertype/Tag Protocol ID */ 53 54 struct vlan_header { 55 uint16 vlan_type; /* 0x8100 */ 56 uint16 vlan_tag; /* priority, cfi and vid */ 57 }; 58 59 struct ethervlan_header { 60 uint8 ether_dhost[ETHER_ADDR_LEN]; 61 uint8 ether_shost[ETHER_ADDR_LEN]; 62 uint16 vlan_type; /* 0x8100 */ 63 uint16 vlan_tag; /* priority, cfi and vid */ 64 uint16 ether_type; 65 }; 66 67 struct dot3_mac_llc_snapvlan_header { 68 uint8 ether_dhost[ETHER_ADDR_LEN]; /* dest mac */ 69 uint8 ether_shost[ETHER_ADDR_LEN]; /* src mac */ 70 uint16 length; /* frame length incl header */ 71 uint8 dsap; /* always 0xAA */ 72 uint8 ssap; /* always 0xAA */ 73 uint8 ctl; /* always 0x03 */ 74 uint8 oui[3]; /* RFC1042: 0x00 0x00 0x00 75 * Bridge-Tunnel: 0x00 0x00 0xF8 76 */ 77 uint16 vlan_type; /* 0x8100 */ 78 uint16 vlan_tag; /* priority, cfi and vid */ 79 uint16 ether_type; /* ethertype */ 80 }; 81 82 #define ETHERVLAN_HDR_LEN (ETHER_HDR_LEN + VLAN_TAG_LEN) 83 84 85 /* This marks the end of a packed structure section. */ 86 #include <packed_section_end.h> 87 88 #define ETHERVLAN_MOVE_HDR(d, s) \ 89 do { \ 90 struct ethervlan_header t; \ 91 t = *(struct ethervlan_header *)(s); \ 92 *(struct ethervlan_header *)(d) = t; \ 93 } while (0) 94 95 #endif /* _vlan_h_ */ 96