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<h1>icmp.h</h1><div class="fragment"><pre>00001 <span class="comment">/*</span>
00002 <span class="comment"> * Copyright (c) 2001, Swedish Institute of Computer Science.</span>
00003 <span class="comment"> * All rights reserved. </span>
00004 <span class="comment"> *</span>
00005 <span class="comment"> * Redistribution and use in source and binary forms, with or without </span>
00006 <span class="comment"> * modification, are permitted provided that the following conditions </span>
00007 <span class="comment"> * are met: </span>
00008 <span class="comment"> * 1. Redistributions of source code must retain the above copyright </span>
00009 <span class="comment"> * notice, this list of conditions and the following disclaimer. </span>
00010 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright </span>
00011 <span class="comment"> * notice, this list of conditions and the following disclaimer in the </span>
00012 <span class="comment"> * documentation and/or other materials provided with the distribution. </span>
00013 <span class="comment"> * 3. Neither the name of the Institute nor the names of its contributors </span>
00014 <span class="comment"> * may be used to endorse or promote products derived from this software </span>
00015 <span class="comment"> * without specific prior written permission. </span>
00016 <span class="comment"> *</span>
00017 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND </span>
00018 <span class="comment"> * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE </span>
00019 <span class="comment"> * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE </span>
00020 <span class="comment"> * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE </span>
00021 <span class="comment"> * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL </span>
00022 <span class="comment"> * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS </span>
00023 <span class="comment"> * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) </span>
00024 <span class="comment"> * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT </span>
00025 <span class="comment"> * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY </span>
00026 <span class="comment"> * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF </span>
00027 <span class="comment"> * SUCH DAMAGE. </span>
00028 <span class="comment"> *</span>
00029 <span class="comment"> * This file is part of the lwIP TCP/IP stack.</span>
00030 <span class="comment"> * </span>
00031 <span class="comment"> * Author: Adam Dunkels <adam@sics.se></span>
00032 <span class="comment"> *</span>
00033 <span class="comment"> * $Id$</span>
00034 <span class="comment"> */</span>
00035 <span class="preprocessor">#ifndef __LWIP_ICMP_H__</span>
00036 <span class="preprocessor"></span><span class="preprocessor">#define __LWIP_ICMP_H__</span>
00037 <span class="preprocessor"></span>
00038 <span class="preprocessor">#include "net/arch.h"</span>
00039
00040 <span class="preprocessor">#include "net/opt.h"</span>
00041 <span class="preprocessor">#include "net/pbuf.h"</span>
00042
00043 <span class="preprocessor">#include "net/netif.h"</span>
00044
00045 <span class="preprocessor">#define ICMP_ER 0 </span><span class="comment">/* echo reply */</span>
00046 <span class="preprocessor">#define ICMP_DUR 3 </span><span class="comment">/* destination unreachable */</span>
00047 <span class="preprocessor">#define ICMP_SQ 4 </span><span class="comment">/* source quench */</span>
00048 <span class="preprocessor">#define ICMP_RD 5 </span><span class="comment">/* redirect */</span>
00049 <span class="preprocessor">#define ICMP_ECHO 8 </span><span class="comment">/* echo */</span>
00050 <span class="preprocessor">#define ICMP_TE 11 </span><span class="comment">/* time exceeded */</span>
00051 <span class="preprocessor">#define ICMP_PP 12 </span><span class="comment">/* parameter problem */</span>
00052 <span class="preprocessor">#define ICMP_TS 13 </span><span class="comment">/* timestamp */</span>
00053 <span class="preprocessor">#define ICMP_TSR 14 </span><span class="comment">/* timestamp reply */</span>
00054 <span class="preprocessor">#define ICMP_IRQ 15 </span><span class="comment">/* information request */</span>
00055 <span class="preprocessor">#define ICMP_IR 16 </span><span class="comment">/* information reply */</span>
00056
00057 <span class="keyword">enum</span> icmp_dur_type {
00058 ICMP_DUR_NET = 0, <span class="comment">/* net unreachable */</span>
00059 ICMP_DUR_HOST = 1, <span class="comment">/* host unreachable */</span>
00060 ICMP_DUR_PROTO = 2, <span class="comment">/* protocol unreachable */</span>
00061 ICMP_DUR_PORT = 3, <span class="comment">/* port unreachable */</span>
00062 ICMP_DUR_FRAG = 4, <span class="comment">/* fragmentation needed and DF set */</span>
00063 ICMP_DUR_SR = 5 <span class="comment">/* source route failed */</span>
00064 };
00065
00066 <span class="keyword">enum</span> icmp_te_type {
00067 ICMP_TE_TTL = 0, <span class="comment">/* time to live exceeded in transit */</span>
00068 ICMP_TE_FRAG = 1 <span class="comment">/* fragment reassembly time exceeded */</span>
00069 };
00070
00071 <span class="keywordtype">void</span> icmp_input(<span class="keyword">struct</span> pbuf *p, <span class="keyword">struct</span> netif *inp);
00072
00073 <span class="keywordtype">void</span> icmp_dest_unreach(<span class="keyword">struct</span> pbuf *p, <span class="keyword">enum</span> icmp_dur_type t);
00074 <span class="keywordtype">void</span> icmp_time_exceeded(<span class="keyword">struct</span> pbuf *p, <span class="keyword">enum</span> icmp_te_type t);
00075
00076 <span class="keyword">struct </span>icmp_echo_hdr {
00077 PACK_STRUCT_FIELD(uInt16 _type_code);
00078 PACK_STRUCT_FIELD(uInt16 chksum);
00079 PACK_STRUCT_FIELD(uInt16 id);
00080 PACK_STRUCT_FIELD(uInt16 seqno);
00081 } PACK_STRUCT_STRUCT;
00082
00083
00084
00085 <span class="keyword">struct </span>icmp_dur_hdr {
00086 PACK_STRUCT_FIELD(uInt16 _type_code);
00087 PACK_STRUCT_FIELD(uInt16 chksum);
00088 PACK_STRUCT_FIELD(uInt32 unused);
00089 } PACK_STRUCT_STRUCT;
00090
00091 <span class="keyword">struct </span>icmp_te_hdr {
00092 PACK_STRUCT_FIELD(uInt16 _type_code);
00093 PACK_STRUCT_FIELD(uInt16 chksum);
00094 PACK_STRUCT_FIELD(uInt32 unused);
00095 } PACK_STRUCT_STRUCT;
00096
00097 <span class="preprocessor">#define ICMPH_TYPE(hdr) (NTOHS((hdr)->_type_code) >> 8)</span>
00098 <span class="preprocessor"></span><span class="preprocessor">#define ICMPH_CODE(hdr) (NTOHS((hdr)->_type_code) & 0xff)</span>
00099 <span class="preprocessor"></span>
00100 <span class="preprocessor">#define ICMPH_TYPE_SET(hdr, type) ((hdr)->_type_code = HTONS(ICMPH_CODE(hdr) | ((type) << 8)))</span>
00101 <span class="preprocessor"></span><span class="preprocessor">#define ICMPH_CODE_SET(hdr, code) ((hdr)->_type_code = HTONS((code) | (ICMPH_TYPE(hdr) << 8)))</span>
00102 <span class="preprocessor"></span>
00103 <span class="preprocessor">#endif </span><span class="comment">/* __LWIP_ICMP_H__ */</span>
00104
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