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 /** The standard ICMP header (unspecified 32 bit data) */ 64 PACK_STRUCT_BEGIN 65 struct icmp_hdr { 66 PACK_STRUCT_FLD_8(u8_t type); 67 PACK_STRUCT_FLD_8(u8_t code); 68 PACK_STRUCT_FIELD(u16_t chksum); 69 PACK_STRUCT_FIELD(u32_t data); 70 } PACK_STRUCT_STRUCT; 71 PACK_STRUCT_END 72 #ifdef PACK_STRUCT_USE_INCLUDES 73 # include "arch/epstruct.h" 74 #endif 75 76 /* Compatibility defines, old versions used to combine type and code to an u16_t */ 77 #define ICMPH_TYPE(hdr) ((hdr)->type) 78 #define ICMPH_CODE(hdr) ((hdr)->code) 79 #define ICMPH_TYPE_SET(hdr, t) ((hdr)->type = (t)) 80 #define ICMPH_CODE_SET(hdr, c) ((hdr)->code = (c)) 81 82 #ifdef PACK_STRUCT_USE_INCLUDES 83 # include "arch/bpstruct.h" 84 #endif 85 /** This is the standard ICMP header only that the u32_t data 86 * is split to two u16_t like ICMP echo needs it. 87 */ 88 PACK_STRUCT_BEGIN 89 struct icmp_echo_hdr { 90 PACK_STRUCT_FLD_8(u8_t type); 91 PACK_STRUCT_FLD_8(u8_t code); 92 PACK_STRUCT_FIELD(u16_t chksum); 93 PACK_STRUCT_FIELD(u16_t id); 94 PACK_STRUCT_FIELD(u16_t seqno); 95 } PACK_STRUCT_STRUCT; 96 PACK_STRUCT_END 97 #ifdef PACK_STRUCT_USE_INCLUDES 98 # include "arch/epstruct.h" 99 #endif 100 101 #ifdef __cplusplus 102 } 103 #endif 104 105 #endif /* LWIP_HDR_PROT_ICMP_H */ 106