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prot/icmp.h
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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
43 extern "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  */
68 PACK_STRUCT_BEGIN
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);
75 } PACK_STRUCT_STRUCT;
76 PACK_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 */
icmp_echo_hdr
This is the standard ICMP header only that the u32_t data is split to two u16_t like ICMP echo needs ...
Definition: prot/icmp.h:69
PACK_STRUCT_BEGIN
#define PACK_STRUCT_BEGIN
Packed structs support.
Definition: arch.h:307
PACK_STRUCT_STRUCT
#define PACK_STRUCT_STRUCT
Packed structs support.
Definition: arch.h:328
PACK_STRUCT_END
#define PACK_STRUCT_END
Packed structs support.
Definition: arch.h:316
arch.h
Support for different processor and compiler architectures.
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