1/**
2 * @file
3 * ICMP protocol definitions
4 */
5
6/*
7 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without modification,
11 * are permitted provided that the following conditions are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright notice,
14 *    this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright notice,
16 *    this list of conditions and the following disclaimer in the documentation
17 *    and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
24 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
26 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
29 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
30 * OF SUCH DAMAGE.
31 *
32 * This file is part of the lwIP TCP/IP stack.
33 *
34 * Author: Adam Dunkels <adam@sics.se>
35 *
36 */
37#ifndef LWIP_HDR_PROT_ICMP_H
38#define LWIP_HDR_PROT_ICMP_H
39
40#include "lwip/arch.h"
41
42#ifdef __cplusplus
43extern "C" {
44#endif
45
46#define ICMP_ER   0    /* echo reply */
47#define ICMP_DUR  3    /* destination unreachable */
48#define ICMP_SQ   4    /* source quench */
49#define ICMP_RD   5    /* redirect */
50#define ICMP_ECHO 8    /* echo */
51#define ICMP_TE  11    /* time exceeded */
52#define ICMP_PP  12    /* parameter problem */
53#define ICMP_TS  13    /* timestamp */
54#define ICMP_TSR 14    /* timestamp reply */
55#define ICMP_IRQ 15    /* information request */
56#define ICMP_IR  16    /* information reply */
57#define ICMP_AM  17    /* address mask request */
58#define ICMP_AMR 18    /* address mask reply */
59
60#ifdef PACK_STRUCT_USE_INCLUDES
61#  include "arch/bpstruct.h"
62#endif
63/** This is the standard ICMP header only that the u32_t data
64 *  is split to two u16_t like ICMP echo needs it.
65 *  This header is also used for other ICMP types that do not
66 *  use the data part.
67 */
68PACK_STRUCT_BEGIN
69struct icmp_echo_hdr {
70  PACK_STRUCT_FLD_8(u8_t type);
71  PACK_STRUCT_FLD_8(u8_t code);
72  PACK_STRUCT_FIELD(u16_t chksum);
73  PACK_STRUCT_FIELD(u16_t id);
74  PACK_STRUCT_FIELD(u16_t seqno);
75} PACK_STRUCT_STRUCT;
76PACK_STRUCT_END
77#ifdef PACK_STRUCT_USE_INCLUDES
78#  include "arch/epstruct.h"
79#endif
80
81/* Compatibility defines, old versions used to combine type and code to an u16_t */
82#define ICMPH_TYPE(hdr) ((hdr)->type)
83#define ICMPH_CODE(hdr) ((hdr)->code)
84#define ICMPH_TYPE_SET(hdr, t) ((hdr)->type = (t))
85#define ICMPH_CODE_SET(hdr, c) ((hdr)->code = (c))
86
87#ifdef __cplusplus
88}
89#endif
90
91#endif /* LWIP_HDR_PROT_ICMP_H */
92