NetServices Stack source
Dependents: HelloWorld ServoInterfaceBoardExample1 4180_Lab4
icmp.h
00001 /* 00002 * Copyright (c) 2001-2004 Swedish Institute of Computer Science. 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without modification, 00006 * are permitted provided that the following conditions are met: 00007 * 00008 * 1. Redistributions of source code must retain the above copyright notice, 00009 * this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright notice, 00011 * this list of conditions and the following disclaimer in the documentation 00012 * and/or other materials provided with the distribution. 00013 * 3. The name of the author may not be used to endorse or promote products 00014 * derived from this software without specific prior written permission. 00015 * 00016 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 00017 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00018 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 00019 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00020 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 00021 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00022 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00023 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 00024 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 00025 * OF SUCH DAMAGE. 00026 * 00027 * This file is part of the lwIP TCP/IP stack. 00028 * 00029 * Author: Adam Dunkels <adam@sics.se> 00030 * 00031 */ 00032 #ifndef __LWIP_ICMP_H__ 00033 #define __LWIP_ICMP_H__ 00034 00035 #include "lwip/opt.h" 00036 #include "lwip/pbuf.h" 00037 #include "lwip/ip_addr.h" 00038 #include "lwip/netif.h" 00039 00040 #ifdef __cplusplus 00041 extern "C" { 00042 #endif 00043 00044 #define ICMP_ER 0 /* echo reply */ 00045 #define ICMP_DUR 3 /* destination unreachable */ 00046 #define ICMP_SQ 4 /* source quench */ 00047 #define ICMP_RD 5 /* redirect */ 00048 #define ICMP_ECHO 8 /* echo */ 00049 #define ICMP_TE 11 /* time exceeded */ 00050 #define ICMP_PP 12 /* parameter problem */ 00051 #define ICMP_TS 13 /* timestamp */ 00052 #define ICMP_TSR 14 /* timestamp reply */ 00053 #define ICMP_IRQ 15 /* information request */ 00054 #define ICMP_IR 16 /* information reply */ 00055 00056 enum icmp_dur_type { 00057 ICMP_DUR_NET = 0, /* net unreachable */ 00058 ICMP_DUR_HOST = 1, /* host unreachable */ 00059 ICMP_DUR_PROTO = 2, /* protocol unreachable */ 00060 ICMP_DUR_PORT = 3, /* port unreachable */ 00061 ICMP_DUR_FRAG = 4, /* fragmentation needed and DF set */ 00062 ICMP_DUR_SR = 5 /* source route failed */ 00063 }; 00064 00065 enum icmp_te_type { 00066 ICMP_TE_TTL = 0, /* time to live exceeded in transit */ 00067 ICMP_TE_FRAG = 1 /* fragment reassembly time exceeded */ 00068 }; 00069 00070 #ifdef PACK_STRUCT_USE_INCLUDES 00071 # include "arch/bpstruct.h" 00072 #endif 00073 /* This is the standard ICMP header only that the u32_t data 00074 * is splitted to two u16_t like ICMP echo needs it. 00075 * This header is also used for other ICMP types that do not 00076 * use the data part. 00077 */ 00078 PACK_STRUCT_BEGIN 00079 struct icmp_echo_hdr { 00080 PACK_STRUCT_FIELD(u8_t type); 00081 PACK_STRUCT_FIELD(u8_t code); 00082 PACK_STRUCT_FIELD(u16_t chksum); 00083 PACK_STRUCT_FIELD(u16_t id); 00084 PACK_STRUCT_FIELD(u16_t seqno); 00085 } PACK_STRUCT_STRUCT; 00086 PACK_STRUCT_END 00087 #ifdef PACK_STRUCT_USE_INCLUDES 00088 # include "arch/epstruct.h" 00089 #endif 00090 00091 #define ICMPH_TYPE(hdr) ((hdr)->type) 00092 #define ICMPH_CODE(hdr) ((hdr)->code) 00093 00094 /* Combines type and code to an u16_t */ 00095 #define ICMPH_TYPE_SET(hdr, t) ((hdr)->type = (t)) 00096 #define ICMPH_CODE_SET(hdr, c) ((hdr)->code = (c)) 00097 00098 00099 #if LWIP_ICMP /* don't build if not configured for use in lwipopts.h */ 00100 00101 void icmp_input(struct pbuf *p, struct netif *inp); 00102 void icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t); 00103 void icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t); 00104 00105 #endif /* LWIP_ICMP */ 00106 00107 #ifdef __cplusplus 00108 } 00109 #endif 00110 00111 #endif /* __LWIP_ICMP_H__ */
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