1 /* 2 * 802.1Q VLAN protocol definitions 3 * 4 * Copyright (C) 1999-2013, Broadcom Corporation 5 * 6 * Permission to use, copy, modify, and/or distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 13 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 15 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 16 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 * 18 * $Id: vlan.h 382883 2013-02-04 23:26:09Z $ 19 */ 20 21 #ifndef _vlan_h_ 22 #define _vlan_h_ 23 24 #ifndef _TYPEDEFS_H_ 25 #include <typedefs.h> 26 #endif 27 28 /* This marks the start of a packed structure section. */ 29 #include <packed_section_start.h> 30 31 #ifndef VLAN_VID_MASK 32 #define VLAN_VID_MASK 0xfff /* low 12 bits are vlan id */ 33 #endif 34 35 #define VLAN_CFI_SHIFT 12 /* canonical format indicator bit */ 36 #define VLAN_PRI_SHIFT 13 /* user priority */ 37 38 #define VLAN_PRI_MASK 7 /* 3 bits of priority */ 39 40 #define VLAN_TPID_OFFSET 12 /* offset of tag protocol id field */ 41 #define VLAN_TCI_OFFSET 14 /* offset of tag ctrl info field */ 42 43 #define VLAN_TAG_LEN 4 44 #define VLAN_TAG_OFFSET (2 * ETHER_ADDR_LEN) /* offset in Ethernet II packet only */ 45 46 #define VLAN_TPID 0x8100 /* VLAN ethertype/Tag Protocol ID */ 47 48 struct vlan_header { 49 uint16 vlan_type; /* 0x8100 */ 50 uint16 vlan_tag; /* priority, cfi and vid */ 51 }; 52 53 struct ethervlan_header { 54 uint8 ether_dhost[ETHER_ADDR_LEN]; 55 uint8 ether_shost[ETHER_ADDR_LEN]; 56 uint16 vlan_type; /* 0x8100 */ 57 uint16 vlan_tag; /* priority, cfi and vid */ 58 uint16 ether_type; 59 }; 60 61 struct dot3_mac_llc_snapvlan_header { 62 uint8 ether_dhost[ETHER_ADDR_LEN]; /* dest mac */ 63 uint8 ether_shost[ETHER_ADDR_LEN]; /* src mac */ 64 uint16 length; /* frame length incl header */ 65 uint8 dsap; /* always 0xAA */ 66 uint8 ssap; /* always 0xAA */ 67 uint8 ctl; /* always 0x03 */ 68 uint8 oui[3]; /* RFC1042: 0x00 0x00 0x00 69 * Bridge-Tunnel: 0x00 0x00 0xF8 70 */ 71 uint16 vlan_type; /* 0x8100 */ 72 uint16 vlan_tag; /* priority, cfi and vid */ 73 uint16 ether_type; /* ethertype */ 74 }; 75 76 #define ETHERVLAN_HDR_LEN (ETHER_HDR_LEN + VLAN_TAG_LEN) 77 78 79 /* This marks the end of a packed structure section. */ 80 #include <packed_section_end.h> 81 82 #define ETHERVLAN_MOVE_HDR(d, s) \ 83 do { \ 84 struct ethervlan_header t; \ 85 t = *(struct ethervlan_header *)(s); \ 86 *(struct ethervlan_header *)(d) = t; \ 87 } while (0) 88 89 #endif /* _vlan_h_ */ 90