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<div class="title">icmp.c</div> </div>
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<a href="../../df/d61/icmp_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>  </div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * Copyright (c) 2001-2004 Swedish Institute of Computer Science.</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without modification,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * are permitted provided that the following conditions are met:</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * 1. Redistributions of source code must retain the above copyright notice,</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * this list of conditions and the following disclaimer.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright notice,</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * this list of conditions and the following disclaimer in the documentation</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * and/or other materials provided with the distribution.</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * 3. The name of the author may not be used to endorse or promote products</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * derived from this software without specific prior written permission.</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * This file is part of the lwIP TCP/IP stack.</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * Author: Adam Dunkels <adam@sics.se></span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  </div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment">/* Some ICMP messages should be passed to the transport protocols. This</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> is not implemented. */</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  </div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#include "<a class="code" href="../../dc/dba/opt_8h.html">net/opt.h</a>"</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  </div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#if LWIP_IPV4 && LWIP_ICMP </span><span class="comment">/* don't build if not configured for use in lwipopts.h */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  </div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#include "<a class="code" href="../../d0/d49/icmp_8h.html">net/icmp.h</a>"</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#include "<a class="code" href="../../d2/d45/inet__chksum_8h.html">net/inet_chksum.h</a>"</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor">#include "<a class="code" href="../../da/d2f/ip_8h.html">net/ip.h</a>"</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#include "<a class="code" href="../../d4/da4/def_8h.html">net/def.h</a>"</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#include "<a class="code" href="../../d9/d9b/stats_8h.html">net/stats.h</a>"</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#include <<a class="code" href="../../da/d66/string_8h.html">string.h</a>></span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  </div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#ifdef LWIP_HOOK_FILENAME</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor">#include LWIP_HOOK_FILENAME</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  </div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor">#ifndef LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor">#define LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN 1</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  </div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment">/* The amount of data from the original packet to return in a dest-unreachable */</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor">#define ICMP_DEST_UNREACH_DATASIZE 8</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  </div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="keyword">static</span> <span class="keywordtype">void</span> icmp_send_response(<span class="keyword">struct</span> <a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *p, <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> type, <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> code);</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  </div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> icmp_input(<span class="keyword">struct</span> <a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *p, <span class="keyword">struct</span> <a class="code" href="../../d2/dd6/structnetif.html">netif</a> *inp)</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> {</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> type;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor">#ifdef LWIP_DEBUG</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> code;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_DEBUG */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keyword">struct </span><a class="code" href="../../d8/db8/structicmp__echo__hdr.html">icmp_echo_hdr</a> *iecho;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keyword">const</span> <span class="keyword">struct </span><a class="code" href="../../da/d9b/structip__hdr.html">ip_hdr</a> *iphdr_in;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> hlen;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keyword">const</span> ip4_addr_t* src;</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  </div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <a class="code" href="../../d9/d9b/stats_8h.html#ab885363b29506cb4b68d891f5a056e55">ICMP_STATS_INC</a>(icmp.recv);</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpinmsgs);</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  </div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  iphdr_in = ip4_current_header();</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  hlen = <a class="code" href="../../de/d0f/prot_2ip4_8h.html#a7c60caeb708571a07a44309c10ec3a01">IPH_HL</a>(iphdr_in) * 4;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">if</span> (hlen < <a class="code" href="../../de/d0f/prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>) {</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, (<span class="stringliteral">"icmp_input: short IP header (%"</span><a class="code" href="../../de/d8c/group__compiler__abstraction.html#gac05a82d37afb251470f5e17ca15ab6e9">S16_F</a><span class="stringliteral">" bytes) received\n"</span>, hlen));</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">goto</span> lenerr;</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  }</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">if</span> (p-><a class="code" href="../../d9/db8/structpbuf.html#a6f82449625e36e294f5d210268c0703f">len</a> < <span class="keyword">sizeof</span>(<a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)*2) {</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, (<span class="stringliteral">"icmp_input: short ICMP (%"</span><a class="code" href="../../de/d8c/group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" bytes) received\n"</span>, p-><a class="code" href="../../d9/db8/structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a>));</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">goto</span> lenerr;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  }</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  </div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  type = *((<a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *)p-><a class="code" href="../../d9/db8/structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>);</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="preprocessor">#ifdef LWIP_DEBUG</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  code = *(((<a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *)p-><a class="code" href="../../d9/db8/structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>)+1);</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_DEBUG */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">switch</span> (type) {</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">case</span> <a class="code" href="../../d9/da8/prot_2icmp_8h.html#af1ff8912ae85b066d9dbe6caf3334ab7">ICMP_ER</a>:</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="comment">/* This is OK, echo reply might have been parsed by a raw PCB</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"> (as obviously, an echo request has been sent, too). */</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpinechoreps);</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordflow">case</span> <a class="code" href="../../d9/da8/prot_2icmp_8h.html#ad58231410d58e34b455328b888a9e73c">ICMP_ECHO</a>:</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpinechos);</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  src = ip4_current_dest_addr();</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="comment">/* multicast destination address? */</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">if</span> (ip4_addr_ismulticast(ip4_current_dest_addr())) {</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="preprocessor">#if LWIP_MULTICAST_PING</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="comment">/* For multicast, use address of receiving interface as source address */</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  src = netif_ip4_addr(inp);</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="preprocessor">#else </span><span class="comment">/* LWIP_MULTICAST_PING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, (<span class="stringliteral">"icmp_input: Not echoing to multicast pings\n"</span>));</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">goto</span> icmperr;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_MULTICAST_PING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  }</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="comment">/* broadcast destination address? */</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">if</span> (ip4_addr_isbroadcast(ip4_current_dest_addr(), <a class="code" href="../../da/d2f/ip_8h.html#aabecef3c7653a9767c79245c44fcab9f">ip_current_netif</a>())) {</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="preprocessor">#if LWIP_BROADCAST_PING</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="comment">/* For broadcast, use address of receiving interface as source address */</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  src = netif_ip4_addr(inp);</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="preprocessor">#else </span><span class="comment">/* LWIP_BROADCAST_PING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, (<span class="stringliteral">"icmp_input: Not echoing to broadcast pings\n"</span>));</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">goto</span> icmperr;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_BROADCAST_PING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, (<span class="stringliteral">"icmp_input: ping\n"</span>));</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">if</span> (p-><a class="code" href="../../d9/db8/structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a> < <span class="keyword">sizeof</span>(<span class="keyword">struct</span> <a class="code" href="../../d8/db8/structicmp__echo__hdr.html">icmp_echo_hdr</a>)) {</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, (<span class="stringliteral">"icmp_input: bad ICMP echo received\n"</span>));</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">goto</span> lenerr;</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  }</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="preprocessor">#if CHECKSUM_CHECK_ICMP</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <a class="code" href="../../d9/d69/netif_8h.html#ad968df1b35c2fae368e087966e3bc677">IF__NETIF_CHECKSUM_ENABLED</a>(inp, NETIF_CHECKSUM_CHECK_ICMP) {</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">if</span> (<a class="code" href="../../d2/d45/inet__chksum_8h.html#ab35967a50418358e194e8f80fdc3c865">inet_chksum_pbuf</a>(p) != 0) {</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, (<span class="stringliteral">"icmp_input: checksum failed for received ICMP echo\n"</span>));</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <a class="code" href="../../d7/d05/group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <a class="code" href="../../d9/d9b/stats_8h.html#ab885363b29506cb4b68d891f5a056e55">ICMP_STATS_INC</a>(icmp.chkerr);</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpinerrors);</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  }</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  }</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="preprocessor">#if LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN</span></div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">if</span> (<a class="code" href="../../d0/d35/pbuf_8h.html#aaa17c1951cf2d207b6adfd3947d91f00">pbuf_header</a>(p, (<a class="code" href="../../de/d8c/group__compiler__abstraction.html#gacf46f4df0ebab84edebcb69967fdf86b">s16_t</a>)(hlen + <a class="code" href="../../d2/d78/lwipopts_8h.html#a35998a3d56af9940e6a80bb372597685">PBUF_LINK_HLEN</a> + <a class="code" href="../../d2/d78/lwipopts_8h.html#a6e1ba1875ae5168a17b53d83597bc1de">PBUF_LINK_ENCAPSULATION_HLEN</a>))) {</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="comment">/* p is not big enough to contain link headers</span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment"> * allocate a new one and copy p into it</span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keyword">struct </span><a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *r;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="comment">/* allocate new packet buffer with space for link headers */</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  r = <a class="code" href="../../d7/d05/group__pbuf.html#gacfcb0a2af918658ba0afe36499c65f47">pbuf_alloc</a>(<a class="code" href="../../d7/d05/group__pbuf.html#ggaee1baa59bb2f85ba575b5a8619ac1ebfab4de441e737330558b609a990cd17346">PBUF_LINK</a>, p-><a class="code" href="../../d9/db8/structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a> + hlen, <a class="code" href="../../d7/d05/group__pbuf.html#ggab7e0e32fcc292c0d7107721766ed92fbac5e9f28455bca98944a030d4b84ecfab">PBUF_RAM</a>);</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">if</span> (r == <a class="code" href="../../d6/d8a/fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, (<span class="stringliteral">"icmp_input: allocating new pbuf failed\n"</span>));</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">goto</span> icmperr;</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  }</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">if</span> (r-><a class="code" href="../../d9/db8/structpbuf.html#a6f82449625e36e294f5d210268c0703f">len</a> < hlen + <span class="keyword">sizeof</span>(<span class="keyword">struct</span> <a class="code" href="../../d8/db8/structicmp__echo__hdr.html">icmp_echo_hdr</a>)) {</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a> | <a class="code" href="../../d6/d7a/group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a>, (<span class="stringliteral">"first pbuf cannot hold the ICMP header"</span>));</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <a class="code" href="../../d7/d05/group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(r);</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keywordflow">goto</span> icmperr;</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  }</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="comment">/* copy the ip header */</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <a class="code" href="../../d2/d78/lwipopts_8h.html#aa1dd57a66b6de8c0593e9e3e8d1411f6">MEMCPY</a>(r-><a class="code" href="../../d9/db8/structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>, iphdr_in, hlen);</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="comment">/* switch r->payload back to icmp header (cannot fail) */</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordflow">if</span> (<a class="code" href="../../d0/d35/pbuf_8h.html#aaa17c1951cf2d207b6adfd3947d91f00">pbuf_header</a>(r, (<a class="code" href="../../de/d8c/group__compiler__abstraction.html#gacf46f4df0ebab84edebcb69967fdf86b">s16_t</a>)-hlen)) {</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <a class="code" href="../../db/d16/debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"icmp_input: moving r->payload to icmp header failed\n"</span>, 0);</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <a class="code" href="../../d7/d05/group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(r);</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordflow">goto</span> icmperr;</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  }</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="comment">/* copy the rest of the packet without ip header */</span></div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordflow">if</span> (<a class="code" href="../../d7/d05/group__pbuf.html#gaba88511dee3df4b631fde691f421320d">pbuf_copy</a>(r, p) != <a class="code" href="../../d2/de7/group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>) {</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a> | <a class="code" href="../../d6/d7a/group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a>, (<span class="stringliteral">"icmp_input: copying to new pbuf failed"</span>));</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <a class="code" href="../../d7/d05/group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(r);</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keywordflow">goto</span> icmperr;</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  }</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="comment">/* free the original p */</span></div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <a class="code" href="../../d7/d05/group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="comment">/* we now have an identical copy of p that has room for link headers */</span></div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  p = r;</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="comment">/* restore p->payload to point to icmp header (cannot fail) */</span></div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="keywordflow">if</span> (<a class="code" href="../../d0/d35/pbuf_8h.html#aaa17c1951cf2d207b6adfd3947d91f00">pbuf_header</a>(p, -(<a class="code" href="../../de/d8c/group__compiler__abstraction.html#gacf46f4df0ebab84edebcb69967fdf86b">s16_t</a>)(hlen + <a class="code" href="../../d2/d78/lwipopts_8h.html#a35998a3d56af9940e6a80bb372597685">PBUF_LINK_HLEN</a> + <a class="code" href="../../d2/d78/lwipopts_8h.html#a6e1ba1875ae5168a17b53d83597bc1de">PBUF_LINK_ENCAPSULATION_HLEN</a>))) {</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <a class="code" href="../../db/d16/debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"icmp_input: restoring original p->payload failed\n"</span>, 0);</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keywordflow">goto</span> icmperr;</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  }</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  }</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="comment">/* At this point, all checks are OK. */</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="comment">/* We generate an answer by switching the dest and src ip addresses,</span></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="comment"> * setting the icmp type to ECHO_RESPONSE and updating the checksum. */</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  iecho = (<span class="keyword">struct </span><a class="code" href="../../d8/db8/structicmp__echo__hdr.html">icmp_echo_hdr</a> *)p-><a class="code" href="../../d9/db8/structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  if (<a class="code" href="../../d0/d35/pbuf_8h.html#aaa17c1951cf2d207b6adfd3947d91f00">pbuf_header</a>(p, (<a class="code" href="../../de/d8c/group__compiler__abstraction.html#gacf46f4df0ebab84edebcb69967fdf86b">s16_t</a>)hlen)) {</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a> | <a class="code" href="../../d6/d7a/group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a>, (<span class="stringliteral">"Can't move over header in packet"</span>));</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <a class="code" href="../../d2/de7/group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> ret;</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keyword">struct </span><a class="code" href="../../da/d9b/structip__hdr.html">ip_hdr</a> *iphdr = (<span class="keyword">struct </span><a class="code" href="../../da/d9b/structip__hdr.html">ip_hdr</a>*)p-><a class="code" href="../../d9/db8/structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  ip4_addr_copy(iphdr->src, *src);</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  ip4_addr_copy(iphdr->dest, *ip4_current_src_addr());</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <a class="code" href="../../d9/da8/prot_2icmp_8h.html#ace6032454f29355a352ec8218e45959f">ICMPH_TYPE_SET</a>(iecho, <a class="code" href="../../d9/da8/prot_2icmp_8h.html#af1ff8912ae85b066d9dbe6caf3334ab7">ICMP_ER</a>);</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="preprocessor">#if CHECKSUM_GEN_ICMP</span></div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <a class="code" href="../../d9/d69/netif_8h.html#ad968df1b35c2fae368e087966e3bc677">IF__NETIF_CHECKSUM_ENABLED</a>(inp, NETIF_CHECKSUM_GEN_ICMP) {</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="comment">/* adjust the checksum */</span></div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordflow">if</span> (iecho->chksum > <a class="code" href="../../d4/da4/def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a>(0xffffU - (<a class="code" href="../../d9/da8/prot_2icmp_8h.html#ad58231410d58e34b455328b888a9e73c">ICMP_ECHO</a> << 8))) {</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  iecho->chksum += <a class="code" href="../../d4/da4/def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a>(<a class="code" href="../../d9/da8/prot_2icmp_8h.html#ad58231410d58e34b455328b888a9e73c">ICMP_ECHO</a> << 8) + 1;</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  iecho->chksum += <a class="code" href="../../d4/da4/def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a>(<a class="code" href="../../d9/da8/prot_2icmp_8h.html#ad58231410d58e34b455328b888a9e73c">ICMP_ECHO</a> << 8);</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  }</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  }</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="preprocessor">#if LWIP_CHECKSUM_CTRL_PER_NETIF</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  iecho->chksum = 0;</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  }</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_CHECKSUM_CTRL_PER_NETIF */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="preprocessor">#else </span><span class="comment">/* CHECKSUM_GEN_ICMP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  iecho->chksum = 0;</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="preprocessor">#endif </span><span class="comment">/* CHECKSUM_GEN_ICMP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  </div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="comment">/* Set the correct TTL and recalculate the header checksum. */</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <a class="code" href="../../de/d0f/prot_2ip4_8h.html#aa0e49f03bd4c3144e3548a0db72d1deb">IPH_TTL_SET</a>(iphdr, <a class="code" href="../../d2/d78/lwipopts_8h.html#ae1533f2bc39a5843989909555f6ce0cf">ICMP_TTL</a>);</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <a class="code" href="../../de/d0f/prot_2ip4_8h.html#aec30403fb98b013bd094688de55cdaef">IPH_CHKSUM_SET</a>(iphdr, 0);</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="preprocessor">#if CHECKSUM_GEN_IP</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <a class="code" href="../../d9/d69/netif_8h.html#ad968df1b35c2fae368e087966e3bc677">IF__NETIF_CHECKSUM_ENABLED</a>(inp, NETIF_CHECKSUM_GEN_IP) {</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <a class="code" href="../../de/d0f/prot_2ip4_8h.html#aec30403fb98b013bd094688de55cdaef">IPH_CHKSUM_SET</a>(iphdr, <a class="code" href="../../d2/d45/inet__chksum_8h.html#a34f1aa1587562a09e11b704b51bab043">inet_chksum</a>(iphdr, hlen));</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  }</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="preprocessor">#endif </span><span class="comment">/* CHECKSUM_GEN_IP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  </div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <a class="code" href="../../d9/d9b/stats_8h.html#ab885363b29506cb4b68d891f5a056e55">ICMP_STATS_INC</a>(icmp.xmit);</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="comment">/* increase number of messages attempted to send */</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpoutmsgs);</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="comment">/* increase number of echo replies attempted to send */</span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpoutechoreps);</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  </div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="comment">/* send an ICMP packet */</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  ret = ip4_output_if(p, src, <a class="code" href="../../da/d2f/ip_8h.html#a2b7dff1859ced5f2be3fc3da231819d7">LWIP_IP_HDRINCL</a>,</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <a class="code" href="../../d2/d78/lwipopts_8h.html#ae1533f2bc39a5843989909555f6ce0cf">ICMP_TTL</a>, 0, <a class="code" href="../../d4/d19/prot_2ip_8h.html#aacaea7b8c4c8a5229c02b653766b4793">IP_PROTO_ICMP</a>, inp);</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordflow">if</span> (ret != <a class="code" href="../../d2/de7/group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>) {</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, (<span class="stringliteral">"icmp_input: ip_output_if returned an error: %s\n"</span>, <a class="code" href="../../d6/d40/err_8h.html#ab58c2561ad3b133e625183721b25ba27">lwip_strerr</a>(ret)));</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  }</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  }</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keywordflow">if</span> (type == <a class="code" href="../../d9/da8/prot_2icmp_8h.html#a87f8266c067fb604419fbf17c0d57d64">ICMP_DUR</a>) {</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpindestunreachs);</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (type == <a class="code" href="../../d9/da8/prot_2icmp_8h.html#a58e03a47804158d97a9c069cc2204797">ICMP_TE</a>) {</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpintimeexcds);</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (type == <a class="code" href="../../d9/da8/prot_2icmp_8h.html#a495e2e90e09c924c16ad8e6fef4b89dc">ICMP_PP</a>) {</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpinparmprobs);</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (type == <a class="code" href="../../d9/da8/prot_2icmp_8h.html#aeaa5cc8a0b5b0c7ffe590991b3b2a262">ICMP_SQ</a>) {</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpinsrcquenchs);</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (type == <a class="code" href="../../d9/da8/prot_2icmp_8h.html#af8671e386aaa07888ad2bcb6150b113f">ICMP_RD</a>) {</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpinredirects);</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (type == <a class="code" href="../../d9/da8/prot_2icmp_8h.html#a776eca11e543699d8e55d470b3809a05">ICMP_TS</a>) {</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpintimestamps);</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (type == <a class="code" href="../../d9/da8/prot_2icmp_8h.html#a01f3814d260088de9777de2634130070">ICMP_TSR</a>) {</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpintimestampreps);</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (type == <a class="code" href="../../d9/da8/prot_2icmp_8h.html#aafd8ecaee2bd9157acd53aa36786939e">ICMP_AM</a>) {</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpinaddrmasks);</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (type == <a class="code" href="../../d9/da8/prot_2icmp_8h.html#af77f81e08bcebe7c581da033c3f95465">ICMP_AMR</a>) {</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpinaddrmaskreps);</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  }</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, (<span class="stringliteral">"icmp_input: ICMP type %"</span><a class="code" href="../../de/d8c/group__compiler__abstraction.html#gac05a82d37afb251470f5e17ca15ab6e9">S16_F</a><span class="stringliteral">" code %"</span><a class="code" href="../../de/d8c/group__compiler__abstraction.html#gac05a82d37afb251470f5e17ca15ab6e9">S16_F</a><span class="stringliteral">" not supported.\n"</span>,</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  (<a class="code" href="../../de/d8c/group__compiler__abstraction.html#gacf46f4df0ebab84edebcb69967fdf86b">s16_t</a>)type, (<a class="code" href="../../de/d8c/group__compiler__abstraction.html#gacf46f4df0ebab84edebcb69967fdf86b">s16_t</a>)code));</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <a class="code" href="../../d9/d9b/stats_8h.html#ab885363b29506cb4b68d891f5a056e55">ICMP_STATS_INC</a>(icmp.proterr);</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <a class="code" href="../../d9/d9b/stats_8h.html#ab885363b29506cb4b68d891f5a056e55">ICMP_STATS_INC</a>(icmp.drop);</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  }</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <a class="code" href="../../d7/d05/group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> lenerr:</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <a class="code" href="../../d7/d05/group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <a class="code" href="../../d9/d9b/stats_8h.html#ab885363b29506cb4b68d891f5a056e55">ICMP_STATS_INC</a>(icmp.lenerr);</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpinerrors);</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="preprocessor">#if LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN || !LWIP_MULTICAST_PING || !LWIP_BROADCAST_PING</span></div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> icmperr:</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <a class="code" href="../../d7/d05/group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <a class="code" href="../../d9/d9b/stats_8h.html#ab885363b29506cb4b68d891f5a056e55">ICMP_STATS_INC</a>(icmp.err);</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpinerrors);</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN || !LWIP_MULTICAST_PING || !LWIP_BROADCAST_PING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span> }</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  </div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span> icmp_dest_unreach(<span class="keyword">struct</span> <a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *p, <span class="keyword">enum</span> <a class="code" href="../../d0/d49/icmp_8h.html#a17637465f209385e5d19ef47fd9266a5">icmp_dur_type</a> t)</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> {</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpoutdestunreachs);</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  icmp_send_response(p, <a class="code" href="../../d9/da8/prot_2icmp_8h.html#a87f8266c067fb604419fbf17c0d57d64">ICMP_DUR</a>, t);</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span> }</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  </div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span> <span class="preprocessor">#if IP_FORWARD || IP_REASSEMBLY</span></div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  </div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> icmp_time_exceeded(<span class="keyword">struct</span> <a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *p, <span class="keyword">enum</span> <a class="code" href="../../d0/d49/icmp_8h.html#a058d0a0769bd38db99fc6fd1dad1324a">icmp_te_type</a> t)</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> {</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpouttimeexcds);</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  icmp_send_response(p, <a class="code" href="../../d9/da8/prot_2icmp_8h.html#a58e03a47804158d97a9c069cc2204797">ICMP_TE</a>, t);</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> }</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  </div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_FORWARD || IP_REASSEMBLY */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  </div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span> icmp_send_response(<span class="keyword">struct</span> <a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *p, <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> type, <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> code)</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span> {</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keyword">struct </span><a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *q;</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keyword">struct </span><a class="code" href="../../da/d9b/structip__hdr.html">ip_hdr</a> *iphdr;</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  <span class="comment">/* we can use the echo header here */</span></div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keyword">struct </span><a class="code" href="../../d8/db8/structicmp__echo__hdr.html">icmp_echo_hdr</a> *icmphdr;</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  ip4_addr_t iphdr_src;</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keyword">struct </span><a class="code" href="../../d2/dd6/structnetif.html">netif</a> *<a class="code" href="../../d2/dd6/structnetif.html">netif</a>;</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  </div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="comment">/* increase number of messages attempted to send */</span></div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpoutmsgs);</div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  </div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="comment">/* ICMP header + IP header + 8 bytes of data */</span></div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  q = <a class="code" href="../../d7/d05/group__pbuf.html#gacfcb0a2af918658ba0afe36499c65f47">pbuf_alloc</a>(<a class="code" href="../../d7/d05/group__pbuf.html#ggaee1baa59bb2f85ba575b5a8619ac1ebfafcc1e506061ba69dfa142eb6b3da5f13">PBUF_IP</a>, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> <a class="code" href="../../d8/db8/structicmp__echo__hdr.html">icmp_echo_hdr</a>) + <a class="code" href="../../de/d0f/prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a> + ICMP_DEST_UNREACH_DATASIZE,</div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <a class="code" href="../../d7/d05/group__pbuf.html#ggab7e0e32fcc292c0d7107721766ed92fbac5e9f28455bca98944a030d4b84ecfab">PBUF_RAM</a>);</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  <span class="keywordflow">if</span> (q == <a class="code" href="../../d6/d8a/fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, (<span class="stringliteral">"icmp_time_exceeded: failed to allocate pbuf for ICMP packet.\n"</span>));</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <a class="code" href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.icmpouterrors);</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  }</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <a class="code" href="../../db/d16/debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"check that first pbuf can hold icmp message"</span>,</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  (q-><a class="code" href="../../d9/db8/structpbuf.html#a6f82449625e36e294f5d210268c0703f">len</a> >= (<span class="keyword">sizeof</span>(<span class="keyword">struct</span> <a class="code" href="../../d8/db8/structicmp__echo__hdr.html">icmp_echo_hdr</a>) + <a class="code" href="../../de/d0f/prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a> + ICMP_DEST_UNREACH_DATASIZE)));</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  </div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  iphdr = (<span class="keyword">struct </span><a class="code" href="../../da/d9b/structip__hdr.html">ip_hdr</a> *)p-><a class="code" href="../../d9/db8/structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, (<span class="stringliteral">"icmp_time_exceeded from "</span>));</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  ip4_addr_debug_print_val(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, iphdr->src);</div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, (<span class="stringliteral">" to "</span>));</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  ip4_addr_debug_print_val(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, iphdr->dest);</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <a class="code" href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a>, (<span class="stringliteral">"\n"</span>));</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  </div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  icmphdr = (<span class="keyword">struct </span><a class="code" href="../../d8/db8/structicmp__echo__hdr.html">icmp_echo_hdr</a> *)q-><a class="code" href="../../d9/db8/structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  icmphdr->type = type;</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  icmphdr->code = code;</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  icmphdr->id = 0;</div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  icmphdr->seqno = 0;</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  </div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  <span class="comment">/* copy fields from original packet */</span></div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <a class="code" href="../../d2/d78/lwipopts_8h.html#a8c6e3c1e4f74acb16376188dbf8909ec">SMEMCPY</a>((<a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *)q-><a class="code" href="../../d9/db8/structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a> + <span class="keyword">sizeof</span>(<span class="keyword">struct </span><a class="code" href="../../d8/db8/structicmp__echo__hdr.html">icmp_echo_hdr</a>), (<a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *)p-><a class="code" href="../../d9/db8/structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>,</div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  <a class="code" href="../../de/d0f/prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a> + ICMP_DEST_UNREACH_DATASIZE);</div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  </div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  ip4_addr_copy(iphdr_src, iphdr->src);</div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span> <span class="preprocessor">#ifdef LWIP_HOOK_IP4_ROUTE_SRC</span></div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  {</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  ip4_addr_t iphdr_dst;</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  ip4_addr_copy(iphdr_dst, iphdr->dest);</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <a class="code" href="../../d2/dd6/structnetif.html">netif</a> = ip4_route_src(&iphdr_src, &iphdr_dst);</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  }</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <a class="code" href="../../d2/dd6/structnetif.html">netif</a> = ip4_route(&iphdr_src);</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  <span class="keywordflow">if</span> (<a class="code" href="../../d2/dd6/structnetif.html">netif</a> != <a class="code" href="../../d6/d8a/fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="comment">/* calculate checksum */</span></div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  icmphdr->chksum = 0;</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span> <span class="preprocessor">#if CHECKSUM_GEN_ICMP</span></div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  <a class="code" href="../../d9/d69/netif_8h.html#ad968df1b35c2fae368e087966e3bc677">IF__NETIF_CHECKSUM_ENABLED</a>(<a class="code" href="../../d2/dd6/structnetif.html">netif</a>, NETIF_CHECKSUM_GEN_ICMP) {</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  icmphdr->chksum = <a class="code" href="../../d2/d45/inet__chksum_8h.html#a34f1aa1587562a09e11b704b51bab043">inet_chksum</a>(icmphdr, q-><a class="code" href="../../d9/db8/structpbuf.html#a6f82449625e36e294f5d210268c0703f">len</a>);</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  }</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <a class="code" href="../../d9/d9b/stats_8h.html#ab885363b29506cb4b68d891f5a056e55">ICMP_STATS_INC</a>(icmp.xmit);</div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  ip4_output_if(q, <a class="code" href="../../d6/d8a/fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>, &iphdr_src, <a class="code" href="../../d2/d78/lwipopts_8h.html#ae1533f2bc39a5843989909555f6ce0cf">ICMP_TTL</a>, 0, <a class="code" href="../../d4/d19/prot_2ip_8h.html#aacaea7b8c4c8a5229c02b653766b4793">IP_PROTO_ICMP</a>, <a class="code" href="../../d2/dd6/structnetif.html">netif</a>);</div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  }</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <a class="code" href="../../d7/d05/group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(q);</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span> }</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  </div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_IPV4 && LWIP_ICMP */</span><span class="preprocessor"></span></div>
</div><!-- fragment --></div><!-- contents -->
</div><!-- doc-content -->
<div class="ttc" id="aprot_2ip4_8h_html_aa0e49f03bd4c3144e3548a0db72d1deb"><div class="ttname"><a href="../../de/d0f/prot_2ip4_8h.html#aa0e49f03bd4c3144e3548a0db72d1deb">IPH_TTL_SET</a></div><div class="ttdeci">#define IPH_TTL_SET(hdr, ttl)</div><div class="ttdef"><b>Definition:</b> <a href="../../de/d0f/prot_2ip4_8h_source.html#l00118">ip4.h:118</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_gac05a82d37afb251470f5e17ca15ab6e9"><div class="ttname"><a href="../../de/d8c/group__compiler__abstraction.html#gac05a82d37afb251470f5e17ca15ab6e9">S16_F</a></div><div class="ttdeci">#define S16_F</div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d2d/arch_8h_source.html#l00151">arch.h:151</a></div></div>
<div class="ttc" id="aprot_2icmp_8h_html_aafd8ecaee2bd9157acd53aa36786939e"><div class="ttname"><a href="../../d9/da8/prot_2icmp_8h.html#aafd8ecaee2bd9157acd53aa36786939e">ICMP_AM</a></div><div class="ttdeci">#define ICMP_AM</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/da8/prot_2icmp_8h_source.html#l00057">icmp.h:57</a></div></div>
<div class="ttc" id="aopt_8h_html"><div class="ttname"><a href="../../dc/dba/opt_8h.html">opt.h</a></div></div>
<div class="ttc" id="astructpbuf_html_a6f82449625e36e294f5d210268c0703f"><div class="ttname"><a href="../../d9/db8/structpbuf.html#a6f82449625e36e294f5d210268c0703f">pbuf::len</a></div><div class="ttdeci">u16_t len</div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d35/pbuf_8h_source.html#l00159">pbuf.h:159</a></div></div>
<div class="ttc" id="agroup__pbuf_html_ggaee1baa59bb2f85ba575b5a8619ac1ebfab4de441e737330558b609a990cd17346"><div class="ttname"><a href="../../d7/d05/group__pbuf.html#ggaee1baa59bb2f85ba575b5a8619ac1ebfab4de441e737330558b609a990cd17346">PBUF_LINK</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d35/pbuf_8h_source.html#l00085">pbuf.h:85</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_gacf46f4df0ebab84edebcb69967fdf86b"><div class="ttname"><a href="../../de/d8c/group__compiler__abstraction.html#gacf46f4df0ebab84edebcb69967fdf86b">s16_t</a></div><div class="ttdeci">int16_t s16_t</div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d2d/arch_8h_source.html#l00125">arch.h:125</a></div></div>
<div class="ttc" id="adef_8h_html"><div class="ttname"><a href="../../d4/da4/def_8h.html">def.h</a></div></div>
<div class="ttc" id="adebug_8h_html_a94ad086267808462beae2b38f91996ed"><div class="ttname"><a href="../../db/d16/debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a></div><div class="ttdeci">#define LWIP_ASSERT(message, assertion)</div><div class="ttdef"><b>Definition:</b> <a href="../../db/d16/debug_8h_source.html#l00116">debug.h:116</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_ga77570ac4fcab86864fa1916e55676da2"><div class="ttname"><a href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a></div><div class="ttdeci">uint16_t u16_t</div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d2d/arch_8h_source.html#l00124">arch.h:124</a></div></div>
<div class="ttc" id="astring_8h_html"><div class="ttname"><a href="../../da/d66/string_8h.html">string.h</a></div></div>
<div class="ttc" id="agroup__pbuf_html_ggaee1baa59bb2f85ba575b5a8619ac1ebfafcc1e506061ba69dfa142eb6b3da5f13"><div class="ttname"><a href="../../d7/d05/group__pbuf.html#ggaee1baa59bb2f85ba575b5a8619ac1ebfafcc1e506061ba69dfa142eb6b3da5f13">PBUF_IP</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d35/pbuf_8h_source.html#l00080">pbuf.h:80</a></div></div>
<div class="ttc" id="astructpbuf_html_a5259e7ec29bab9c0999b64f2e86b411f"><div class="ttname"><a href="../../d9/db8/structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">pbuf::tot_len</a></div><div class="ttdeci">u16_t tot_len</div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d35/pbuf_8h_source.html#l00156">pbuf.h:156</a></div></div>
<div class="ttc" id="aprot_2icmp_8h_html_a495e2e90e09c924c16ad8e6fef4b89dc"><div class="ttname"><a href="../../d9/da8/prot_2icmp_8h.html#a495e2e90e09c924c16ad8e6fef4b89dc">ICMP_PP</a></div><div class="ttdeci">#define ICMP_PP</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/da8/prot_2icmp_8h_source.html#l00052">icmp.h:52</a></div></div>
<div class="ttc" id="agroup__pbuf_html_gab0dd696fb4b6bc65e548944584f1738b"><div class="ttname"><a href="../../d7/d05/group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a></div><div class="ttdeci">u8_t pbuf_free(struct pbuf *p)</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/df0/pbuf_8c_source.html#l00715">pbuf.c:715</a></div></div>
<div class="ttc" id="astructicmp__echo__hdr_html"><div class="ttname"><a href="../../d8/db8/structicmp__echo__hdr.html">icmp_echo_hdr</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d9/da8/prot_2icmp_8h_source.html#l00069">icmp.h:69</a></div></div>
<div class="ttc" id="astats_8h_html_ab885363b29506cb4b68d891f5a056e55"><div class="ttname"><a href="../../d9/d9b/stats_8h.html#ab885363b29506cb4b68d891f5a056e55">ICMP_STATS_INC</a></div><div class="ttdeci">#define ICMP_STATS_INC(x)</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/d9b/stats_8h_source.html#l00344">stats.h:344</a></div></div>
<div class="ttc" id="aicmp_8h_html_a17637465f209385e5d19ef47fd9266a5"><div class="ttname"><a href="../../d0/d49/icmp_8h.html#a17637465f209385e5d19ef47fd9266a5">icmp_dur_type</a></div><div class="ttdeci">icmp_dur_type</div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d49/icmp_8h_source.html#l00055">icmp.h:55</a></div></div>
<div class="ttc" id="aprot_2ip4_8h_html_ad76777d4d34f33ab5f715f9ca15503c3"><div class="ttname"><a href="../../de/d0f/prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a></div><div class="ttdeci">#define IP_HLEN</div><div class="ttdef"><b>Definition:</b> <a href="../../de/d0f/prot_2ip4_8h_source.html#l00064">ip4.h:64</a></div></div>
<div class="ttc" id="anetif_8h_html_ad968df1b35c2fae368e087966e3bc677"><div class="ttname"><a href="../../d9/d69/netif_8h.html#ad968df1b35c2fae368e087966e3bc677">IF__NETIF_CHECKSUM_ENABLED</a></div><div class="ttdeci">#define IF__NETIF_CHECKSUM_ENABLED(netif, chksumflag)</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/d69/netif_8h_source.html#l00357">netif.h:357</a></div></div>
<div class="ttc" id="aicmp_8h_html"><div class="ttname"><a href="../../d0/d49/icmp_8h.html">icmp.h</a></div></div>
<div class="ttc" id="astructip__hdr_html"><div class="ttname"><a href="../../da/d9b/structip__hdr.html">ip_hdr</a></div><div class="ttdef"><b>Definition:</b> <a href="../../de/d0f/prot_2ip4_8h_source.html#l00071">ip4.h:71</a></div></div>
<div class="ttc" id="astats_8h_html"><div class="ttname"><a href="../../d9/d9b/stats_8h.html">stats.h</a></div></div>
<div class="ttc" id="aprot_2ip4_8h_html_a7c60caeb708571a07a44309c10ec3a01"><div class="ttname"><a href="../../de/d0f/prot_2ip4_8h.html#a7c60caeb708571a07a44309c10ec3a01">IPH_HL</a></div><div class="ttdeci">#define IPH_HL(hdr)</div><div class="ttdef"><b>Definition:</b> <a href="../../de/d0f/prot_2ip4_8h_source.html#l00103">ip4.h:103</a></div></div>
<div class="ttc" id="agroup__debugging__levels_html_ga0269bdc51f1e8a5ecf9af72c6e1c996c"><div class="ttname"><a href="../../d6/d7a/group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a></div><div class="ttdeci">#define LWIP_DBG_LEVEL_SERIOUS</div><div class="ttdef"><b>Definition:</b> <a href="../../db/d16/debug_8h_source.html#l00057">debug.h:57</a></div></div>
<div class="ttc" id="aip_8h_html_aabecef3c7653a9767c79245c44fcab9f"><div class="ttname"><a href="../../da/d2f/ip_8h.html#aabecef3c7653a9767c79245c44fcab9f">ip_current_netif</a></div><div class="ttdeci">#define ip_current_netif()</div><div class="ttdef"><b>Definition:</b> <a href="../../da/d2f/ip_8h_source.html#l00133">ip.h:133</a></div></div>
<div class="ttc" id="agroup__pbuf_html_gacfcb0a2af918658ba0afe36499c65f47"><div class="ttname"><a href="../../d7/d05/group__pbuf.html#gacfcb0a2af918658ba0afe36499c65f47">pbuf_alloc</a></div><div class="ttdeci">struct pbuf * pbuf_alloc(pbuf_layer l, u16_t length, pbuf_type type)</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/df0/pbuf_8c_source.html#l00248">pbuf.c:248</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_ga4caecabca98b43919dd11be1c0d4cd8e"><div class="ttname"><a href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a></div><div class="ttdeci">uint8_t u8_t</div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d2d/arch_8h_source.html#l00122">arch.h:122</a></div></div>
<div class="ttc" id="aprot_2ip_8h_html_aacaea7b8c4c8a5229c02b653766b4793"><div class="ttname"><a href="../../d4/d19/prot_2ip_8h.html#aacaea7b8c4c8a5229c02b653766b4793">IP_PROTO_ICMP</a></div><div class="ttdeci">#define IP_PROTO_ICMP</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d19/prot_2ip_8h_source.html#l00042">ip.h:42</a></div></div>
<div class="ttc" id="alwipopts_8h_html_a35998a3d56af9940e6a80bb372597685"><div class="ttname"><a href="../../d2/d78/lwipopts_8h.html#a35998a3d56af9940e6a80bb372597685">PBUF_LINK_HLEN</a></div><div class="ttdeci">#define PBUF_LINK_HLEN</div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d78/lwipopts_8h_source.html#l00209">lwipopts.h:209</a></div></div>
<div class="ttc" id="aprot_2icmp_8h_html_a776eca11e543699d8e55d470b3809a05"><div class="ttname"><a href="../../d9/da8/prot_2icmp_8h.html#a776eca11e543699d8e55d470b3809a05">ICMP_TS</a></div><div class="ttdeci">#define ICMP_TS</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/da8/prot_2icmp_8h_source.html#l00053">icmp.h:53</a></div></div>
<div class="ttc" id="aprot_2icmp_8h_html_a01f3814d260088de9777de2634130070"><div class="ttname"><a href="../../d9/da8/prot_2icmp_8h.html#a01f3814d260088de9777de2634130070">ICMP_TSR</a></div><div class="ttdeci">#define ICMP_TSR</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/da8/prot_2icmp_8h_source.html#l00054">icmp.h:54</a></div></div>
<div class="ttc" id="astructnetif_html"><div class="ttname"><a href="../../d2/dd6/structnetif.html">netif</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d9/d69/netif_8h_source.html#l00233">netif.h:233</a></div></div>
<div class="ttc" id="alwipopts_8h_html_a9595904a1cb9bfe0b9b1d958abdc923a"><div class="ttname"><a href="../../d2/d78/lwipopts_8h.html#a9595904a1cb9bfe0b9b1d958abdc923a">ICMP_DEBUG</a></div><div class="ttdeci">#define ICMP_DEBUG</div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d78/lwipopts_8h_source.html#l00443">lwipopts.h:443</a></div></div>
<div class="ttc" id="aprot_2icmp_8h_html_af1ff8912ae85b066d9dbe6caf3334ab7"><div class="ttname"><a href="../../d9/da8/prot_2icmp_8h.html#af1ff8912ae85b066d9dbe6caf3334ab7">ICMP_ER</a></div><div class="ttdeci">#define ICMP_ER</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/da8/prot_2icmp_8h_source.html#l00046">icmp.h:46</a></div></div>
<div class="ttc" id="agroup__pbuf_html_gaba88511dee3df4b631fde691f421320d"><div class="ttname"><a href="../../d7/d05/group__pbuf.html#gaba88511dee3df4b631fde691f421320d">pbuf_copy</a></div><div class="ttdeci">err_t pbuf_copy(struct pbuf *p_to, const struct pbuf *p_from)</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/df0/pbuf_8c_source.html#l00949">pbuf.c:949</a></div></div>
<div class="ttc" id="astats_8h_html_a237a8f1e47af42fb612e936e928a9ced"><div class="ttname"><a href="../../d9/d9b/stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a></div><div class="ttdeci">#define MIB2_STATS_INC(x)</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/d9b/stats_8h_source.html#l00467">stats.h:467</a></div></div>
<div class="ttc" id="aprot_2icmp_8h_html_af8671e386aaa07888ad2bcb6150b113f"><div class="ttname"><a href="../../d9/da8/prot_2icmp_8h.html#af8671e386aaa07888ad2bcb6150b113f">ICMP_RD</a></div><div class="ttdeci">#define ICMP_RD</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/da8/prot_2icmp_8h_source.html#l00049">icmp.h:49</a></div></div>
<div class="ttc" id="aprot_2icmp_8h_html_af77f81e08bcebe7c581da033c3f95465"><div class="ttname"><a href="../../d9/da8/prot_2icmp_8h.html#af77f81e08bcebe7c581da033c3f95465">ICMP_AMR</a></div><div class="ttdeci">#define ICMP_AMR</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/da8/prot_2icmp_8h_source.html#l00058">icmp.h:58</a></div></div>
<div class="ttc" id="agroup__pbuf_html_ggab7e0e32fcc292c0d7107721766ed92fbac5e9f28455bca98944a030d4b84ecfab"><div class="ttname"><a href="../../d7/d05/group__pbuf.html#ggab7e0e32fcc292c0d7107721766ed92fbac5e9f28455bca98944a030d4b84ecfab">PBUF_RAM</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d35/pbuf_8h_source.html#l00108">pbuf.h:108</a></div></div>
<div class="ttc" id="aprot_2icmp_8h_html_aeaa5cc8a0b5b0c7ffe590991b3b2a262"><div class="ttname"><a href="../../d9/da8/prot_2icmp_8h.html#aeaa5cc8a0b5b0c7ffe590991b3b2a262">ICMP_SQ</a></div><div class="ttdeci">#define ICMP_SQ</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/da8/prot_2icmp_8h_source.html#l00048">icmp.h:48</a></div></div>
<div class="ttc" id="aprot_2icmp_8h_html_ace6032454f29355a352ec8218e45959f"><div class="ttname"><a href="../../d9/da8/prot_2icmp_8h.html#ace6032454f29355a352ec8218e45959f">ICMPH_TYPE_SET</a></div><div class="ttdeci">#define ICMPH_TYPE_SET(hdr, t)</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/da8/prot_2icmp_8h_source.html#l00084">icmp.h:84</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_gaa9d7f6eb2ee9fcc5eda3545dbb1886e0"><div class="ttname"><a href="../../de/d8c/group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a></div><div class="ttdeci">#define U16_F</div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d2d/arch_8h_source.html#l00148">arch.h:148</a></div></div>
<div class="ttc" id="agroup__infrastructure__errors_html_ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb"><div class="ttname"><a href="../../d2/de7/group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d6/d40/err_8h_source.html#l00063">err.h:63</a></div></div>
<div class="ttc" id="agroup__infrastructure__errors_html_gaf02d9da80fd66b4f986d2c53d7231ddb"><div class="ttname"><a href="../../d2/de7/group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div><div class="ttdeci">s8_t err_t</div><div class="ttdef"><b>Definition:</b> <a href="../../d6/d40/err_8h_source.html#l00057">err.h:57</a></div></div>
<div class="ttc" id="aip_8h_html"><div class="ttname"><a href="../../da/d2f/ip_8h.html">ip.h</a></div></div>
<div class="ttc" id="aprot_2ip4_8h_html_aec30403fb98b013bd094688de55cdaef"><div class="ttname"><a href="../../de/d0f/prot_2ip4_8h.html#aec30403fb98b013bd094688de55cdaef">IPH_CHKSUM_SET</a></div><div class="ttdeci">#define IPH_CHKSUM_SET(hdr, chksum)</div><div class="ttdef"><b>Definition:</b> <a href="../../de/d0f/prot_2ip4_8h_source.html#l00120">ip4.h:120</a></div></div>
<div class="ttc" id="alwipopts_8h_html_ae1533f2bc39a5843989909555f6ce0cf"><div class="ttname"><a href="../../d2/d78/lwipopts_8h.html#ae1533f2bc39a5843989909555f6ce0cf">ICMP_TTL</a></div><div class="ttdeci">#define ICMP_TTL</div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d78/lwipopts_8h_source.html#l00135">lwipopts.h:135</a></div></div>
<div class="ttc" id="aicmp_8h_html_a058d0a0769bd38db99fc6fd1dad1324a"><div class="ttname"><a href="../../d0/d49/icmp_8h.html#a058d0a0769bd38db99fc6fd1dad1324a">icmp_te_type</a></div><div class="ttdeci">icmp_te_type</div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d49/icmp_8h_source.html#l00071">icmp.h:71</a></div></div>
<div class="ttc" id="ainet__chksum_8h_html_a34f1aa1587562a09e11b704b51bab043"><div class="ttname"><a href="../../d2/d45/inet__chksum_8h.html#a34f1aa1587562a09e11b704b51bab043">inet_chksum</a></div><div class="ttdeci">u16_t inet_chksum(const void *dataptr, u16_t len)</div><div class="ttdef"><b>Definition:</b> <a href="../../da/d81/inet__chksum_8c_source.html#l00555">inet_chksum.c:555</a></div></div>
<div class="ttc" id="alwipopts_8h_html_aa1dd57a66b6de8c0593e9e3e8d1411f6"><div class="ttname"><a href="../../d2/d78/lwipopts_8h.html#aa1dd57a66b6de8c0593e9e3e8d1411f6">MEMCPY</a></div><div class="ttdeci">#define MEMCPY(dst, src, len)</div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d78/lwipopts_8h_source.html#l00043">lwipopts.h:43</a></div></div>
<div class="ttc" id="aprot_2icmp_8h_html_a58e03a47804158d97a9c069cc2204797"><div class="ttname"><a href="../../d9/da8/prot_2icmp_8h.html#a58e03a47804158d97a9c069cc2204797">ICMP_TE</a></div><div class="ttdeci">#define ICMP_TE</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/da8/prot_2icmp_8h_source.html#l00051">icmp.h:51</a></div></div>
<div class="ttc" id="ainet__chksum_8h_html_ab35967a50418358e194e8f80fdc3c865"><div class="ttname"><a href="../../d2/d45/inet__chksum_8h.html#ab35967a50418358e194e8f80fdc3c865">inet_chksum_pbuf</a></div><div class="ttdeci">u16_t inet_chksum_pbuf(struct pbuf *p)</div><div class="ttdef"><b>Definition:</b> <a href="../../da/d81/inet__chksum_8c_source.html#l00568">inet_chksum.c:568</a></div></div>
<div class="ttc" id="aip_8h_html_a2b7dff1859ced5f2be3fc3da231819d7"><div class="ttname"><a href="../../da/d2f/ip_8h.html#a2b7dff1859ced5f2be3fc3da231819d7">LWIP_IP_HDRINCL</a></div><div class="ttdeci">#define LWIP_IP_HDRINCL</div><div class="ttdef"><b>Definition:</b> <a href="../../da/d2f/ip_8h_source.html#l00058">ip.h:58</a></div></div>
<div class="ttc" id="alwipopts_8h_html_a8c6e3c1e4f74acb16376188dbf8909ec"><div class="ttname"><a href="../../d2/d78/lwipopts_8h.html#a8c6e3c1e4f74acb16376188dbf8909ec">SMEMCPY</a></div><div class="ttdeci">#define SMEMCPY(dst, src, len)</div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d78/lwipopts_8h_source.html#l00044">lwipopts.h:44</a></div></div>
<div class="ttc" id="aprot_2icmp_8h_html_ad58231410d58e34b455328b888a9e73c"><div class="ttname"><a href="../../d9/da8/prot_2icmp_8h.html#ad58231410d58e34b455328b888a9e73c">ICMP_ECHO</a></div><div class="ttdeci">#define ICMP_ECHO</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/da8/prot_2icmp_8h_source.html#l00050">icmp.h:50</a></div></div>
<div class="ttc" id="astructpbuf_html"><div class="ttname"><a href="../../d9/db8/structpbuf.html">pbuf</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d35/pbuf_8h_source.html#l00142">pbuf.h:142</a></div></div>
<div class="ttc" id="alwipopts_8h_html_a6e1ba1875ae5168a17b53d83597bc1de"><div class="ttname"><a href="../../d2/d78/lwipopts_8h.html#a6e1ba1875ae5168a17b53d83597bc1de">PBUF_LINK_ENCAPSULATION_HLEN</a></div><div class="ttdeci">#define PBUF_LINK_ENCAPSULATION_HLEN</div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d78/lwipopts_8h_source.html#l00211">lwipopts.h:211</a></div></div>
<div class="ttc" id="adebug_8h_html_a63a04edf7ff63c951bd8706711956cdb"><div class="ttname"><a href="../../db/d16/debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a></div><div class="ttdeci">#define LWIP_DEBUGF(debug, message)</div><div class="ttdef"><b>Definition:</b> <a href="../../db/d16/debug_8h_source.html#l00164">debug.h:164</a></div></div>
<div class="ttc" id="ainet__chksum_8h_html"><div class="ttname"><a href="../../d2/d45/inet__chksum_8h.html">inet_chksum.h</a></div></div>
<div class="ttc" id="apbuf_8h_html_aaa17c1951cf2d207b6adfd3947d91f00"><div class="ttname"><a href="../../d0/d35/pbuf_8h.html#aaa17c1951cf2d207b6adfd3947d91f00">pbuf_header</a></div><div class="ttdeci">u8_t pbuf_header(struct pbuf *p, s16_t header_size)</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/df0/pbuf_8c_source.html#l00665">pbuf.c:665</a></div></div>
<div class="ttc" id="aprot_2icmp_8h_html_a87f8266c067fb604419fbf17c0d57d64"><div class="ttname"><a href="../../d9/da8/prot_2icmp_8h.html#a87f8266c067fb604419fbf17c0d57d64">ICMP_DUR</a></div><div class="ttdeci">#define ICMP_DUR</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/da8/prot_2icmp_8h_source.html#l00047">icmp.h:47</a></div></div>
<div class="ttc" id="astructpbuf_html_a8d32dc3e964369d4eec638fc37fbc460"><div class="ttname"><a href="../../d9/db8/structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">pbuf::payload</a></div><div class="ttdeci">void * payload</div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d35/pbuf_8h_source.html#l00147">pbuf.h:147</a></div></div>
<div class="ttc" id="adef_8h_html_a0dfd02d7c09f9c698a5a7ecc0b7287ad"><div class="ttname"><a href="../../d4/da4/def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a></div><div class="ttdeci">#define PP_HTONS(x)</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/da4/def_8h_source.html#l00079">def.h:79</a></div></div>
<div class="ttc" id="aerr_8h_html_ab58c2561ad3b133e625183721b25ba27"><div class="ttname"><a href="../../d6/d40/err_8h.html#ab58c2561ad3b133e625183721b25ba27">lwip_strerr</a></div><div class="ttdeci">#define lwip_strerr(x)</div><div class="ttdef"><b>Definition:</b> <a href="../../d6/d40/err_8h_source.html#l00108">err.h:108</a></div></div>
<div class="ttc" id="afat__string_8h_html_a070d2ce7b6bb7e5c05602aa8c308d0c4"><div class="ttname"><a href="../../d6/d8a/fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a></div><div class="ttdeci">#define NULL</div><div class="ttdef"><b>Definition:</b> <a href="../../d6/d8a/fat__string_8h_source.html#l00017">fat_string.h:17</a></div></div>
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