2 * Copyright (c) 2021 Jiri Svoboda
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 * @file Ethernet, IP/Ethernet standard definitions
42 #define ETH_ADDR_SIZE 6
43 #define IPV4_ADDR_SIZE 4
44 #define ETH_FRAME_MIN_SIZE 60
46 /** Ethernet frame header */
48 /** Destination Address */
49 uint8_t dest
[ETH_ADDR_SIZE
];
51 uint8_t src
[ETH_ADDR_SIZE
];
52 /** Ethertype or Length */
56 /** ARP packet format (for 48-bit MAC addresses and IPv4) */
58 /** Hardware address space */
59 uint16_t hw_addr_space
;
60 /** Protocol address space */
61 uint16_t proto_addr_space
;
62 /** Hardware address size */
64 /** Protocol address size */
65 uint8_t proto_addr_size
;
68 /** Sender hardware address */
69 uint8_t sender_hw_addr
[ETH_ADDR_SIZE
];
70 /** Sender protocol address */
71 uint32_t sender_proto_addr
;
72 /** Target hardware address */
73 uint8_t target_hw_addr
[ETH_ADDR_SIZE
];
74 /** Target protocol address */
75 uint32_t target_proto_addr
;
76 } __attribute__((packed
)) arp_eth_packet_fmt_t
;
83 enum arp_hw_addr_space
{