1 /*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 * Copyright (c) 2021-2022 The FreeBSD Foundation
8 *
9 * Portions of this software were developed by Björn Zeeb
10 * under sponsorship from the FreeBSD Foundation.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice unmodified, this list of conditions, and the following
17 * disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33 #ifndef _LINUXKPI_LINUX_IF_ETHER_H_
34 #define _LINUXKPI_LINUX_IF_ETHER_H_
35
36 #include <linux/types.h>
37 #include <linux/skbuff.h>
38
39 #include <net/ethernet.h>
40
41 #define ETH_HLEN ETHER_HDR_LEN /* Total octets in header. */
42 #ifndef ETH_ALEN
43 #define ETH_ALEN ETHER_ADDR_LEN
44 #endif
45 #define ETH_FRAME_LEN (ETHER_MAX_LEN - ETHER_CRC_LEN)
46 #define ETH_FCS_LEN 4 /* Octets in the FCS */
47 #define VLAN_HLEN 4 /* The additional bytes (on top of the Ethernet header)
48 * that VLAN requires. */
49 /*
50 * defined Ethernet Protocol ID's.
51 */
52 #define ETH_P_ARP ETHERTYPE_ARP
53 #define ETH_P_IP ETHERTYPE_IP
54 #define ETH_P_IPV6 ETHERTYPE_IPV6
55 #define ETH_P_MPLS_UC ETHERTYPE_MPLS
56 #define ETH_P_MPLS_MC ETHERTYPE_MPLS_MCAST
57 #define ETH_P_8021Q ETHERTYPE_VLAN
58 #define ETH_P_8021AD ETHERTYPE_QINQ
59 #define ETH_P_PAE ETHERTYPE_PAE
60 #define ETH_P_802_2 ETHERTYPE_8023
61 #define ETH_P_IPX ETHERTYPE_IPX
62 #define ETH_P_AARP ETHERTYPE_AARP
63 #define ETH_P_802_3_MIN 0x05DD /* See comment in sys/net/ethernet.h */
64 #define ETH_P_LINK_CTL 0x886C /* ITU-T G.989.2 */
65 #define ETH_P_TDLS 0x890D /* 802.11z-2010, see wpa. */
66
67 struct ethhdr {
68 uint8_t h_dest[ETH_ALEN];
69 uint8_t h_source[ETH_ALEN];
70 uint16_t h_proto;
71 } __packed;
72
73 static inline struct ethhdr *
eth_hdr(const struct sk_buff * skb)74 eth_hdr(const struct sk_buff *skb)
75 {
76 struct ethhdr *hdr;
77
78 hdr = (struct ethhdr *)skb_mac_header(skb);
79 return (hdr);
80 }
81
82 #endif /* _LINUXKPI_LINUX_IF_ETHER_H_ */
83