3 * ICMP protocol definitions
7 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
10 * Redistribution and use in source and binary forms, with or without modification,
11 * are permitted provided that the following conditions are met:
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
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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.
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
32 * This file is part of the lwIP TCP/IP stack.
34 * Author: Adam Dunkels <adam@sics.se>
37 #ifndef LWIP_HDR_PROT_ICMP_H
38 #define LWIP_HDR_PROT_ICMP_H
40 #include "lwip/arch.h"
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 */
60 #ifdef PACK_STRUCT_USE_INCLUDES
61 # include "arch/bpstruct.h"
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
69 struct 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);
77 #ifdef PACK_STRUCT_USE_INCLUDES
78 # include "arch/epstruct.h"
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))
91 #endif /* LWIP_HDR_PROT_ICMP_H */