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<div class="title">arp.c</div> </div>
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<a href="arp_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> <span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2001, Swedish Institute of Computer Science.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * All rights reserved. </span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without </span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * modification, are permitted provided that the following conditions </span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * are met: </span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * 1. Redistributions of source code must retain the above copyright </span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * notice, this list of conditions and the following disclaimer. </span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright </span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * notice, this list of conditions and the following disclaimer in the </span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * documentation and/or other materials provided with the distribution. </span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * 3. Neither the name of the Institute nor the names of its contributors </span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * may be used to endorse or promote products derived from this software </span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * without specific prior written permission. </span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND </span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE </span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE </span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE </span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL </span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS </span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) </span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT </span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY </span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF </span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * SUCH DAMAGE. </span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * This file is part of the lwIP TCP/IP stack.</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * Author: Adam Dunkels <adam@sics.se></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"> * $Id: arp.c 54 2016-01-11 01:29:55Z reddawg $</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"> */</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include <<a class="code" href="include_2sys_2types_8h.html">sys/types.h</a>></span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#include <<a class="code" href="kprintf_8h.html">lib/kprintf.h</a>></span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  </div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#include "<a class="code" href="debug_8h.html">net/debug.h</a>"</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include "net/ipv4/inet.h"</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#include "netif/arp.h"</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#include "net/ipv4/ip.h"</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</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"><a class="line" href="arp_8c.html#a741a0710dc126ed3ae9e305472df3432"> 46</a></span> <span class="preprocessor">#define ARP_MAXAGE 2 </span><span class="comment">/* 120 * 10 seconds = 20 minutes. */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  </div>
<div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="arp_8c.html#a28a28d3e575df3e75985e2313cc2d51a"> 48</a></span> <span class="preprocessor">#define HWTYPE_ETHERNET 1</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  </div>
<div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="arp_8c.html#a7a7c46ffaba30477b8c9e3e61bd2e106"> 50</a></span> <span class="preprocessor">#define ARP_REQUEST 1</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="arp_8c.html#a06ba7b414e718081998f2814090debf1"> 51</a></span> <span class="preprocessor">#define ARP_REPLY 2</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  </div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment">/* MUST be compiled with "pack structs" or equivalent! */</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <a class="code" href="cc_8h.html#a73199061891adf1b912d20835c7d5e96">PACK_STRUCT_BEGIN</a></div>
<div class="line"><a name="l00055"></a><span class="lineno"><a class="line" href="structarp__hdr.html"> 55</a></span> <span class="keyword">struct </span><a class="code" href="structarp__hdr.html">arp_hdr</a> {</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <a class="code" href="structarp__hdr.html#abf562b78f962f27cb93c538f42c6fe79">PACK_STRUCT_FIELD</a>(<span class="keyword">struct</span> <a class="code" href="structeth__hdr.html">eth_hdr</a> ethhdr);</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <a class="code" href="structarp__hdr.html#abf562b78f962f27cb93c538f42c6fe79">PACK_STRUCT_FIELD</a>(<a class="code" href="objgfx30_8h.html#a81f3b46fa4ddd984830104840a08da82">uInt16</a> hwtype);</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <a class="code" href="structarp__hdr.html#abf562b78f962f27cb93c538f42c6fe79">PACK_STRUCT_FIELD</a>(<a class="code" href="objgfx30_8h.html#a81f3b46fa4ddd984830104840a08da82">uInt16</a> proto);</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <a class="code" href="structarp__hdr.html#abf562b78f962f27cb93c538f42c6fe79">PACK_STRUCT_FIELD</a>(<a class="code" href="objgfx30_8h.html#a81f3b46fa4ddd984830104840a08da82">uInt16</a> _hwlen_protolen);</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <a class="code" href="structarp__hdr.html#abf562b78f962f27cb93c538f42c6fe79">PACK_STRUCT_FIELD</a>(<a class="code" href="objgfx30_8h.html#a81f3b46fa4ddd984830104840a08da82">uInt16</a> opcode);</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <a class="code" href="structarp__hdr.html#abf562b78f962f27cb93c538f42c6fe79">PACK_STRUCT_FIELD</a>(<span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> shwaddr);</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <a class="code" href="structarp__hdr.html#abf562b78f962f27cb93c538f42c6fe79">PACK_STRUCT_FIELD</a>(<span class="keyword">struct</span> ip_addr sipaddr);</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <a class="code" href="structarp__hdr.html#abf562b78f962f27cb93c538f42c6fe79">PACK_STRUCT_FIELD</a>(<span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> dhwaddr);</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <a class="code" href="structarp__hdr.html#abf562b78f962f27cb93c538f42c6fe79">PACK_STRUCT_FIELD</a>(<span class="keyword">struct</span> ip_addr dipaddr);</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> } <a class="code" href="arp_8c.html#ab335643ec08d519342c9d3834091d6e0">PACK_STRUCT_STRUCT</a>;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <a class="code" href="cc_8h.html#a465fef70f294e21cbf4ea51fc342f20e">PACK_STRUCT_END</a></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  </div>
<div class="line"><a name="l00068"></a><span class="lineno"><a class="line" href="arp_8c.html#a06faf2eae13476a702524b13ea6ecd7f"> 68</a></span> <span class="preprocessor">#define ARPH_HWLEN(hdr) (NTOHS((hdr)->_hwlen_protolen) >> 8)</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"><a class="line" href="arp_8c.html#a8c416438814934662a28d7e3c891a175"> 69</a></span> <span class="preprocessor">#define ARPH_PROTOLEN(hdr) (NTOHS((hdr)->_hwlen_protolen) & 0xff)</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  </div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  </div>
<div class="line"><a name="l00072"></a><span class="lineno"><a class="line" href="arp_8c.html#af463dc7a7aaf3ea0b6bc472b261380ac"> 72</a></span> <span class="preprocessor">#define ARPH_HWLEN_SET(hdr, len) (hdr)->_hwlen_protolen = HTONS(ARPH_PROTOLEN(hdr) | ((len) << 8))</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="arp_8c.html#aedb2ded9225b09da0358754f859d72d6"> 73</a></span> <span class="preprocessor">#define ARPH_PROTOLEN_SET(hdr, len) (hdr)->_hwlen_protolen = HTONS((len) | (ARPH_HWLEN(hdr) << 8))</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  </div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <a class="code" href="cc_8h.html#a73199061891adf1b912d20835c7d5e96">PACK_STRUCT_BEGIN</a></div>
<div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="structethip__hdr.html"> 76</a></span> <span class="keyword">struct </span><a class="code" href="structethip__hdr.html">ethip_hdr</a> {</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <a class="code" href="structethip__hdr.html#aeaff5bdb00c5618ea94cc70081ba27d9">PACK_STRUCT_FIELD</a>(<span class="keyword">struct</span> <a class="code" href="structeth__hdr.html">eth_hdr</a> eth);</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <a class="code" href="structethip__hdr.html#aeaff5bdb00c5618ea94cc70081ba27d9">PACK_STRUCT_FIELD</a>(<span class="keyword">struct</span> <a class="code" href="structip__hdr.html">ip_hdr</a> ip);</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> };</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <a class="code" href="cc_8h.html#a465fef70f294e21cbf4ea51fc342f20e">PACK_STRUCT_END</a></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  </div>
<div class="line"><a name="l00082"></a><span class="lineno"><a class="line" href="structarp__entry.html"> 82</a></span> <span class="keyword">struct </span><a class="code" href="structarp__entry.html">arp_entry</a> {</div>
<div class="line"><a name="l00083"></a><span class="lineno"><a class="line" href="structarp__entry.html#ab9ee1643a380bd563aac0dea83973459"> 83</a></span>  <span class="keyword">struct </span>ip_addr <a class="code" href="structarp__entry.html#ab9ee1643a380bd563aac0dea83973459">ipaddr</a>;</div>
<div class="line"><a name="l00084"></a><span class="lineno"><a class="line" href="structarp__entry.html#a4cd78dd42071f584f2b8a5ead9f70eaf"> 84</a></span>  <span class="keyword">struct </span><a class="code" href="structeth__addr.html">eth_addr</a> <a class="code" href="structarp__entry.html#a4cd78dd42071f584f2b8a5ead9f70eaf">ethaddr</a>;</div>
<div class="line"><a name="l00085"></a><span class="lineno"><a class="line" href="structarp__entry.html#a49945e8299d4bf7241c0fd2b5e4d84df"> 85</a></span>  <a class="code" href="objgfx30_8h.html#aa4e0f27a9aca905e340c06d2dcae843c">uInt8</a> <a class="code" href="structarp__entry.html#a49945e8299d4bf7241c0fd2b5e4d84df">ctime</a>;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> };</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  </div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structarp__entry.html">arp_entry</a> arp_table[<a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>];</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="keyword">static</span> <a class="code" href="objgfx30_8h.html#aa4e0f27a9aca905e340c06d2dcae843c">uInt8</a> <a class="code" href="structarp__entry.html#a49945e8299d4bf7241c0fd2b5e4d84df">ctime</a>;</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> <span class="comment">/*-----------------------------------------------------------------------------------*/</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"><a class="line" href="arp_8c.html#ac8ad5a32790d172fcec2eac97a87ee9f"> 93</a></span> <a class="code" href="arp_8c.html#ac8ad5a32790d172fcec2eac97a87ee9f">arp_init</a>(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> {</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <a class="code" href="objgfx30_8h.html#aa4e0f27a9aca905e340c06d2dcae843c">uInt8</a> i;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  </div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">for</span>(i = 0; i < <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>; ++i) {</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <a class="code" href="ip__addr_8h.html#a40db7feae2b92f7a7a01d65a85b06e18">ip_addr_set</a>(&(arp_table[i].<a class="code" href="structarp__entry.html#ab9ee1643a380bd563aac0dea83973459">ipaddr</a>),</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  IP_ADDR_ANY);</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  }</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> }</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment">/*-----------------------------------------------------------------------------------*/</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"><a class="line" href="arp_8c.html#a2cc298ed4c68289160da1376faf20938"> 104</a></span> <a class="code" href="arp_8c.html#a2cc298ed4c68289160da1376faf20938">arp_tmr</a>(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> {</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <a class="code" href="objgfx30_8h.html#aa4e0f27a9aca905e340c06d2dcae843c">uInt8</a> i;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  </div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  ++<a class="code" href="structarp__entry.html#a49945e8299d4bf7241c0fd2b5e4d84df">ctime</a>;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">for</span>(i = 0; i < <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>; ++i) {</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">if</span>(!<a class="code" href="ip__addr_8h.html#a279118890e6a90aa740051fb8b0cc5f4">ip_addr_isany</a>(&arp_table[i].<a class="code" href="structarp__entry.html#ab9ee1643a380bd563aac0dea83973459">ipaddr</a>) && </div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <a class="code" href="structarp__entry.html#a49945e8299d4bf7241c0fd2b5e4d84df">ctime</a> - arp_table[i].<a class="code" href="structarp__entry.html#a49945e8299d4bf7241c0fd2b5e4d84df">ctime</a> >= <a class="code" href="arp_8c.html#a741a0710dc126ed3ae9e305472df3432">ARP_MAXAGE</a>) {</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  DEBUGF(ARP_DEBUG, (<span class="stringliteral">"arp_timer: expired entry %d.\n"</span>, i));</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <a class="code" href="ip__addr_8h.html#a40db7feae2b92f7a7a01d65a85b06e18">ip_addr_set</a>(&(arp_table[i].<a class="code" href="structarp__entry.html#ab9ee1643a380bd563aac0dea83973459">ipaddr</a>),</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  IP_ADDR_ANY);</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  }</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  } </div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> }</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment">/*-----------------------------------------------------------------------------------*/</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> add_arp_entry(<span class="keyword">struct</span> ip_addr *<a class="code" href="structarp__entry.html#ab9ee1643a380bd563aac0dea83973459">ipaddr</a>, <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *<a class="code" href="structarp__entry.html#a4cd78dd42071f584f2b8a5ead9f70eaf">ethaddr</a>)</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> {</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <a class="code" href="objgfx30_8h.html#aa4e0f27a9aca905e340c06d2dcae843c">uInt8</a> i, j, k;</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <a class="code" href="objgfx30_8h.html#aa4e0f27a9aca905e340c06d2dcae843c">uInt8</a> maxtime;</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  </div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="comment">/* Walk through the ARP mapping table and try to find an entry to</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment"> update. If none is found, the IP -> MAC address mapping is</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment"> inserted in the ARP table. */</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordflow">for</span>(i = 0; i < <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>; ++i) {</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  </div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="comment">/* Only check those entries that are actually in use. */</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">if</span>(!<a class="code" href="ip__addr_8h.html#a279118890e6a90aa740051fb8b0cc5f4">ip_addr_isany</a>(&arp_table[i].<a class="code" href="structarp__entry.html#ab9ee1643a380bd563aac0dea83973459">ipaddr</a>)) {</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="comment">/* Check if the source IP address of the incoming packet matches</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"> the IP address in this ARP table entry. */</span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordflow">if</span>(<a class="code" href="ip__addr_8h.html#a008c9c92d770cc030ea054e6b259835a">ip_addr_cmp</a>(<a class="code" href="structarp__entry.html#ab9ee1643a380bd563aac0dea83973459">ipaddr</a>, &arp_table[i].<a class="code" href="structarp__entry.html#ab9ee1643a380bd563aac0dea83973459">ipaddr</a>)) {</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="comment">/* An old entry found, update this and return. */</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordflow">for</span>(k = 0; k < 6; ++k) {</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  arp_table[i].<a class="code" href="structarp__entry.html#a4cd78dd42071f584f2b8a5ead9f70eaf">ethaddr</a>.addr[k] = <a class="code" href="structarp__entry.html#a4cd78dd42071f584f2b8a5ead9f70eaf">ethaddr</a>->addr[k];</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  }</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  arp_table[i].<a class="code" href="structarp__entry.html#a49945e8299d4bf7241c0fd2b5e4d84df">ctime</a> = <a class="code" href="structarp__entry.html#a49945e8299d4bf7241c0fd2b5e4d84df">ctime</a>;</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  }</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>  }</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  </div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="comment">/* If we get here, no existing ARP table entry was found, so we</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="comment"> create one. */</span></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  </div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="comment">/* First, we try to find an unused entry in the ARP table. */</span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordflow">for</span>(i = 0; i < <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>; ++i) {</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">if</span>(<a class="code" href="ip__addr_8h.html#a279118890e6a90aa740051fb8b0cc5f4">ip_addr_isany</a>(&arp_table[i].<a class="code" href="structarp__entry.html#ab9ee1643a380bd563aac0dea83973459">ipaddr</a>)) {</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">break</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>  }</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  </div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="comment">/* If no unused entry is found, we try to find the oldest entry and</span></div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment"> throw it away. */</span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordflow">if</span>(i == <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>) {</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  maxtime = 0;</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  j = 0;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">for</span>(i = 0; i < <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>; ++i) {</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordflow">if</span>(<a class="code" href="structarp__entry.html#a49945e8299d4bf7241c0fd2b5e4d84df">ctime</a> - arp_table[i].<a class="code" href="structarp__entry.html#a49945e8299d4bf7241c0fd2b5e4d84df">ctime</a> > maxtime) {</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  maxtime = <a class="code" href="structarp__entry.html#a49945e8299d4bf7241c0fd2b5e4d84df">ctime</a> - arp_table[i].<a class="code" href="structarp__entry.html#a49945e8299d4bf7241c0fd2b5e4d84df">ctime</a>;</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  j = i;</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  }</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>  i = j;</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  }</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  </div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="comment">/* Now, i is the ARP table entry which we will fill with the new</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="comment"> information. */</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <a class="code" href="ip__addr_8h.html#a40db7feae2b92f7a7a01d65a85b06e18">ip_addr_set</a>(&arp_table[i].<a class="code" href="structarp__entry.html#ab9ee1643a380bd563aac0dea83973459">ipaddr</a>, <a class="code" href="structarp__entry.html#ab9ee1643a380bd563aac0dea83973459">ipaddr</a>);</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordflow">for</span>(k = 0; k < 6; ++k) {</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  arp_table[i].<a class="code" href="structarp__entry.html#a4cd78dd42071f584f2b8a5ead9f70eaf">ethaddr</a>.addr[k] = <a class="code" href="structarp__entry.html#a4cd78dd42071f584f2b8a5ead9f70eaf">ethaddr</a>->addr[k];</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  }</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  arp_table[i].<a class="code" href="structarp__entry.html#a49945e8299d4bf7241c0fd2b5e4d84df">ctime</a> = <a class="code" href="structarp__entry.html#a49945e8299d4bf7241c0fd2b5e4d84df">ctime</a>;</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  </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">/*-----------------------------------------------------------------------------------*/</span></div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00181"></a><span class="lineno"><a class="line" href="arp_8c.html#a916d08dbb8f4a38e1e904a8a018b000c"> 181</a></span> <a class="code" href="arp_8c.html#a916d08dbb8f4a38e1e904a8a018b000c">arp_ip_input</a>(<span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>, <span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *p)</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> {</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keyword">struct </span><a class="code" href="structethip__hdr.html">ethip_hdr</a> *hdr;</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>  hdr = p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  </div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="comment">/* Only insert/update an entry if the source IP address of the</span></div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="comment"> incoming IP packet comes from a host on the local network. */</span></div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordflow">if</span>(!ip_addr_maskcmp(&(hdr->ip.src), &(<a class="code" href="structnetif.html">netif</a>->ip_addr), &(<a class="code" href="structnetif.html">netif</a>->netmask))) {</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  }</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  DEBUGF(ARP_DEBUG, (<span class="stringliteral">"arp_ip_input: updating ARP table.\n"</span>));</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  add_arp_entry(&(hdr->ip.src), &(hdr->eth.src));</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> <span class="comment">/*-----------------------------------------------------------------------------------*/</span></div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="keyword">struct </span><a class="code" href="structpbuf.html">pbuf</a> *</div>
<div class="line"><a name="l00197"></a><span class="lineno"><a class="line" href="arp_8c.html#a57a25dd51cf73f048ad5364ecc2f040b"> 197</a></span> <a class="code" href="arp_8c.html#a57a25dd51cf73f048ad5364ecc2f040b">arp_arp_input</a>(<span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>, <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *ethaddr, <span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *p)</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> {</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keyword">struct </span><a class="code" href="structarp__hdr.html">arp_hdr</a> *hdr;</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <a class="code" href="objgfx30_8h.html#aa4e0f27a9aca905e340c06d2dcae843c">uInt8</a> i;</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  </div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordflow">if</span>(p-><a class="code" href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a> < <span class="keyword">sizeof</span>(<span class="keyword">struct</span> <a class="code" href="structarp__hdr.html">arp_hdr</a>)) {</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"arp_arp_input: packet too short (%d/%d)\n"</span>, p-><a class="code" href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a>, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> <a class="code" href="structarp__hdr.html">arp_hdr</a>));</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">return</span> <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  }</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  </div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  hdr = p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  </div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="comment">//kprintf("HDR->OPCODE: [0x%X]\n", hdr->opcode);</span></div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  </div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordflow">switch</span>(<a class="code" href="def_8h.html#a51799f5ebb4c7228ef7e95c247030f42">htons</a>(hdr->opcode)) {</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">case</span> <a class="code" href="arp_8c.html#a7a7c46ffaba30477b8c9e3e61bd2e106">ARP_REQUEST</a>:</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="comment">// kprintf("ARP_REQUEST");</span></div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="comment">//ip_addr_debug_print(&hdr->dipaddr);</span></div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> <span class="comment">//ip_addr_debug_print(&netif->ip_addr);</span></div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="comment">/* ARP request. If it asked for our address, we send out a</span></div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="comment"> reply. */</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordflow">if</span>(<a class="code" href="ip__addr_8h.html#a008c9c92d770cc030ea054e6b259835a">ip_addr_cmp</a>(&(hdr->dipaddr), &(<a class="code" href="structnetif.html">netif</a>->ip_addr))) {</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="comment">//kprintf("MATCHED!\n");</span></div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  hdr->opcode = <a class="code" href="def_8h.html#a51799f5ebb4c7228ef7e95c247030f42">htons</a>(<a class="code" href="arp_8c.html#a06ba7b414e718081998f2814090debf1">ARP_REPLY</a>);</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  </div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <a class="code" href="ip__addr_8h.html#a40db7feae2b92f7a7a01d65a85b06e18">ip_addr_set</a>(&(hdr->dipaddr), &(hdr->sipaddr));</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <a class="code" href="ip__addr_8h.html#a40db7feae2b92f7a7a01d65a85b06e18">ip_addr_set</a>(&(hdr->sipaddr), &(<a class="code" href="structnetif.html">netif</a>->ip_addr));</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  </div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">for</span>(i = 0; i < 6; ++i) {</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  hdr->dhwaddr.addr[i] = hdr->shwaddr.addr[i];</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  hdr->shwaddr.addr[i] = ethaddr->addr[i];</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  hdr->ethhdr.dest.addr[i] = hdr->dhwaddr.addr[i];</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  hdr->ethhdr.src.addr[i] = ethaddr->addr[i];</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  }</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  </div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  hdr->hwtype = <a class="code" href="def_8h.html#a51799f5ebb4c7228ef7e95c247030f42">htons</a>(<a class="code" href="arp_8c.html#a28a28d3e575df3e75985e2313cc2d51a">HWTYPE_ETHERNET</a>);</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <a class="code" href="arp_8c.html#af463dc7a7aaf3ea0b6bc472b261380ac">ARPH_HWLEN_SET</a>(hdr, 6);</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>  hdr->proto = <a class="code" href="def_8h.html#a51799f5ebb4c7228ef7e95c247030f42">htons</a>(<a class="code" href="group__ethernet.html#gga4f8559808037803168499a3803900339ac95756b20fde70b868ef4185dd221c79">ETHTYPE_IP</a>);</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <a class="code" href="arp_8c.html#aedb2ded9225b09da0358754f859d72d6">ARPH_PROTOLEN_SET</a>(hdr, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> ip_addr)); </div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  </div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  hdr->ethhdr.type = <a class="code" href="def_8h.html#a51799f5ebb4c7228ef7e95c247030f42">htons</a>(<a class="code" href="group__ethernet.html#gga4f8559808037803168499a3803900339a41217db03576ea59c44b28b248c39be5">ETHTYPE_ARP</a>); </div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordflow">return</span> p;</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="keywordflow">break</span>;</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordflow">case</span> <a class="code" href="arp_8c.html#a06ba7b414e718081998f2814090debf1">ARP_REPLY</a>: </div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"ARP_RREPLY"</span>);</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="comment">/* ARP reply. We insert or update the ARP table. */</span></div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordflow">if</span>(<a class="code" href="ip__addr_8h.html#a008c9c92d770cc030ea054e6b259835a">ip_addr_cmp</a>(&(hdr->dipaddr), &(<a class="code" href="structnetif.html">netif</a>->ip_addr))) {</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  add_arp_entry(&(hdr->sipaddr), &(hdr->shwaddr));</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>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"arp_arp_input: unknown type %d\n"</span>, <a class="code" href="def_8h.html#a51799f5ebb4c7228ef7e95c247030f42">htons</a>(hdr->opcode));</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  }</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  </div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keywordflow">return</span> <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> }</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="comment">/*-----------------------------------------------------------------------------------*/</span></div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <span class="keyword">struct </span><a class="code" href="structeth__addr.html">eth_addr</a> *</div>
<div class="line"><a name="l00260"></a><span class="lineno"><a class="line" href="arp_8c.html#aeec8fff4f036cca2ac1b5635fa46d21b"> 260</a></span> <a class="code" href="arp_8c.html#aeec8fff4f036cca2ac1b5635fa46d21b">arp_lookup</a>(<span class="keyword">struct</span> ip_addr *ipaddr)</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> {</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <a class="code" href="objgfx30_8h.html#aa4e0f27a9aca905e340c06d2dcae843c">uInt8</a> i;</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  </div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <span class="keywordflow">for</span>(i = 0; i < <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>; ++i) {</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordflow">if</span>(<a class="code" href="ip__addr_8h.html#a008c9c92d770cc030ea054e6b259835a">ip_addr_cmp</a>(ipaddr, &arp_table[i].ipaddr)) {</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="keywordflow">return</span> &arp_table[i].<a class="code" href="structarp__entry.html#a4cd78dd42071f584f2b8a5ead9f70eaf">ethaddr</a>;</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  }</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  }</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keywordflow">return</span> <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>; </div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span> }</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="comment">/*-----------------------------------------------------------------------------------*/</span></div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="keyword">struct </span><a class="code" href="structpbuf.html">pbuf</a> *</div>
<div class="line"><a name="l00273"></a><span class="lineno"><a class="line" href="arp_8c.html#a9d1287b9a80c370797b2ac5c63f70e2e"> 273</a></span> <a class="code" href="arp_8c.html#a9d1287b9a80c370797b2ac5c63f70e2e">arp_query</a>(<span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>, <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *ethaddr, <span class="keyword">struct</span> ip_addr *ipaddr)</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>  <span class="keyword">struct </span><a class="code" href="structarp__hdr.html">arp_hdr</a> *hdr;</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keyword">struct </span><a class="code" href="structpbuf.html">pbuf</a> *p;</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <a class="code" href="objgfx30_8h.html#aa4e0f27a9aca905e340c06d2dcae843c">uInt8</a> i;</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  </div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  p = <a class="code" href="group__pbuf.html#gacfcb0a2af918658ba0afe36499c65f47">pbuf_alloc</a>(<a class="code" href="group__pbuf.html#ggaee1baa59bb2f85ba575b5a8619ac1ebfab4de441e737330558b609a990cd17346">PBUF_LINK</a>, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> <a class="code" href="structarp__hdr.html">arp_hdr</a>), <a class="code" href="group__pbuf.html#ggab7e0e32fcc292c0d7107721766ed92fbac5e9f28455bca98944a030d4b84ecfab">PBUF_RAM</a>);</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keywordflow">if</span>(p == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keywordflow">return</span> <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  }</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  </div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  hdr = p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  </div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  hdr->opcode = <a class="code" href="def_8h.html#a51799f5ebb4c7228ef7e95c247030f42">htons</a>(<a class="code" href="arp_8c.html#a7a7c46ffaba30477b8c9e3e61bd2e106">ARP_REQUEST</a>);</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  </div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordflow">for</span>(i = 0; i < 6; ++i) {</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  hdr->dhwaddr.addr[i] = 0x00;</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  hdr->shwaddr.addr[i] = ethaddr->addr[i];</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  }</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  </div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <a class="code" href="ip__addr_8h.html#a40db7feae2b92f7a7a01d65a85b06e18">ip_addr_set</a>(&(hdr->dipaddr), ipaddr);</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <a class="code" href="ip__addr_8h.html#a40db7feae2b92f7a7a01d65a85b06e18">ip_addr_set</a>(&(hdr->sipaddr), &(<a class="code" href="structnetif.html">netif</a>->ip_addr));</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  </div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  hdr->hwtype = <a class="code" href="def_8h.html#a51799f5ebb4c7228ef7e95c247030f42">htons</a>(<a class="code" href="arp_8c.html#a28a28d3e575df3e75985e2313cc2d51a">HWTYPE_ETHERNET</a>);</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <a class="code" href="arp_8c.html#af463dc7a7aaf3ea0b6bc472b261380ac">ARPH_HWLEN_SET</a>(hdr, 6);</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  </div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  hdr->proto = <a class="code" href="def_8h.html#a51799f5ebb4c7228ef7e95c247030f42">htons</a>(<a class="code" href="group__ethernet.html#gga4f8559808037803168499a3803900339ac95756b20fde70b868ef4185dd221c79">ETHTYPE_IP</a>);</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <a class="code" href="arp_8c.html#aedb2ded9225b09da0358754f859d72d6">ARPH_PROTOLEN_SET</a>(hdr, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> ip_addr));</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  </div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keywordflow">for</span>(i = 0; i < 6; ++i) {</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  hdr->ethhdr.dest.addr[i] = 0xff;</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  hdr->ethhdr.src.addr[i] = ethaddr->addr[i];</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>  hdr->ethhdr.type = <a class="code" href="def_8h.html#a51799f5ebb4c7228ef7e95c247030f42">htons</a>(<a class="code" href="group__ethernet.html#gga4f8559808037803168499a3803900339a41217db03576ea59c44b28b248c39be5">ETHTYPE_ARP</a>); </div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordflow">return</span> p;</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> }</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> <span class="comment">/*-----------------------------------------------------------------------------------*/</span></div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  </div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  </div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  </div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  </div>
</div><!-- fragment --></div><!-- contents -->
</div><!-- doc-content -->
<div class="ttc" id="aip__addr_8h_html_a008c9c92d770cc030ea054e6b259835a"><div class="ttname"><a href="ip__addr_8h.html#a008c9c92d770cc030ea054e6b259835a">ip_addr_cmp</a></div><div class="ttdeci">#define ip_addr_cmp(addr1, addr2)</div><div class="ttdef"><b>Definition:</b> <a href="ip__addr_8h_source.html#l00316">ip_addr.h:316</a></div></div>
<div class="ttc" id="agroup__pbuf_html_ggaee1baa59bb2f85ba575b5a8619ac1ebfab4de441e737330558b609a990cd17346"><div class="ttname"><a href="group__pbuf.html#ggaee1baa59bb2f85ba575b5a8619ac1ebfab4de441e737330558b609a990cd17346">PBUF_LINK</a></div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00085">pbuf.h:85</a></div></div>
<div class="ttc" id="adef_8h_html_a51799f5ebb4c7228ef7e95c247030f42"><div class="ttname"><a href="def_8h.html#a51799f5ebb4c7228ef7e95c247030f42">htons</a></div><div class="ttdeci">#define htons(x)</div><div class="ttdef"><b>Definition:</b> <a href="def_8h_source.html#l00108">def.h:108</a></div></div>
<div class="ttc" id="astructarp__hdr_html_abf562b78f962f27cb93c538f42c6fe79"><div class="ttname"><a href="structarp__hdr.html#abf562b78f962f27cb93c538f42c6fe79">arp_hdr::PACK_STRUCT_FIELD</a></div><div class="ttdeci">PACK_STRUCT_FIELD(struct eth_hdr ethhdr)</div></div>
<div class="ttc" id="aobjgfx30_8h_html_a81f3b46fa4ddd984830104840a08da82"><div class="ttname"><a href="objgfx30_8h.html#a81f3b46fa4ddd984830104840a08da82">uInt16</a></div><div class="ttdeci">unsigned short int uInt16</div><div class="ttdef"><b>Definition:</b> <a href="objgfx30_8h_source.html#l00048">objgfx30.h:48</a></div></div>
<div class="ttc" id="aip__addr_8h_html_a40db7feae2b92f7a7a01d65a85b06e18"><div class="ttname"><a href="ip__addr_8h.html#a40db7feae2b92f7a7a01d65a85b06e18">ip_addr_set</a></div><div class="ttdeci">#define ip_addr_set(dest, src)</div><div class="ttdef"><b>Definition:</b> <a href="ip__addr_8h_source.html#l00307">ip_addr.h:307</a></div></div>
<div class="ttc" id="aarp_8c_html_a2cc298ed4c68289160da1376faf20938"><div class="ttname"><a href="arp_8c.html#a2cc298ed4c68289160da1376faf20938">arp_tmr</a></div><div class="ttdeci">void arp_tmr(void)</div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00104">arp.c:104</a></div></div>
<div class="ttc" id="aip__addr_8h_html_a279118890e6a90aa740051fb8b0cc5f4"><div class="ttname"><a href="ip__addr_8h.html#a279118890e6a90aa740051fb8b0cc5f4">ip_addr_isany</a></div><div class="ttdeci">#define ip_addr_isany(ipaddr)</div><div class="ttdef"><b>Definition:</b> <a href="ip__addr_8h_source.html#l00317">ip_addr.h:317</a></div></div>
<div class="ttc" id="astructpbuf_html_a5259e7ec29bab9c0999b64f2e86b411f"><div class="ttname"><a href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">pbuf::tot_len</a></div><div class="ttdeci">u16_t tot_len</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00156">pbuf.h:156</a></div></div>
<div class="ttc" id="aarp_8c_html_a7a7c46ffaba30477b8c9e3e61bd2e106"><div class="ttname"><a href="arp_8c.html#a7a7c46ffaba30477b8c9e3e61bd2e106">ARP_REQUEST</a></div><div class="ttdeci">#define ARP_REQUEST</div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00050">arp.c:50</a></div></div>
<div class="ttc" id="aarp_8c_html_aedb2ded9225b09da0358754f859d72d6"><div class="ttname"><a href="arp_8c.html#aedb2ded9225b09da0358754f859d72d6">ARPH_PROTOLEN_SET</a></div><div class="ttdeci">#define ARPH_PROTOLEN_SET(hdr, len)</div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00073">arp.c:73</a></div></div>
<div class="ttc" id="aarp_8c_html_a741a0710dc126ed3ae9e305472df3432"><div class="ttname"><a href="arp_8c.html#a741a0710dc126ed3ae9e305472df3432">ARP_MAXAGE</a></div><div class="ttdeci">#define ARP_MAXAGE</div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00046">arp.c:46</a></div></div>
<div class="ttc" id="agroup__pbuf_html_gab0dd696fb4b6bc65e548944584f1738b"><div class="ttname"><a href="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="pbuf_8c_source.html#l00715">pbuf.c:715</a></div></div>
<div class="ttc" id="ainclude_2sys_2types_8h_html"><div class="ttname"><a href="include_2sys_2types_8h.html">types.h</a></div></div>
<div class="ttc" id="astructarp__entry_html_ab9ee1643a380bd563aac0dea83973459"><div class="ttname"><a href="structarp__entry.html#ab9ee1643a380bd563aac0dea83973459">arp_entry::ipaddr</a></div><div class="ttdeci">struct ip_addr ipaddr</div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00083">arp.c:83</a></div></div>
<div class="ttc" id="aarp_8c_html_af463dc7a7aaf3ea0b6bc472b261380ac"><div class="ttname"><a href="arp_8c.html#af463dc7a7aaf3ea0b6bc472b261380ac">ARPH_HWLEN_SET</a></div><div class="ttdeci">#define ARPH_HWLEN_SET(hdr, len)</div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00072">arp.c:72</a></div></div>
<div class="ttc" id="astructip__hdr_html"><div class="ttname"><a href="structip__hdr.html">ip_hdr</a></div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00071">ip4.h:71</a></div></div>
<div class="ttc" id="agroup__pbuf_html_gacfcb0a2af918658ba0afe36499c65f47"><div class="ttname"><a href="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="pbuf_8c_source.html#l00248">pbuf.c:248</a></div></div>
<div class="ttc" id="akprintf_8h_html"><div class="ttname"><a href="kprintf_8h.html">kprintf.h</a></div></div>
<div class="ttc" id="aobjgfx30_8h_html_aa4e0f27a9aca905e340c06d2dcae843c"><div class="ttname"><a href="objgfx30_8h.html#aa4e0f27a9aca905e340c06d2dcae843c">uInt8</a></div><div class="ttdeci">unsigned char uInt8</div><div class="ttdef"><b>Definition:</b> <a href="objgfx30_8h_source.html#l00047">objgfx30.h:47</a></div></div>
<div class="ttc" id="acc_8h_html_a73199061891adf1b912d20835c7d5e96"><div class="ttname"><a href="cc_8h.html#a73199061891adf1b912d20835c7d5e96">PACK_STRUCT_BEGIN</a></div><div class="ttdeci">#define PACK_STRUCT_BEGIN</div><div class="ttdef"><b>Definition:</b> <a href="cc_8h_source.html#l00008">cc.h:8</a></div></div>
<div class="ttc" id="astructeth__hdr_html"><div class="ttname"><a href="structeth__hdr.html">eth_hdr</a></div><div class="ttdef"><b>Definition:</b> <a href="prot_2ethernet_8h_source.html#l00071">ethernet.h:71</a></div></div>
<div class="ttc" id="astructnetif_html"><div class="ttname"><a href="structnetif.html">netif</a></div><div class="ttdef"><b>Definition:</b> <a href="netif_8h_source.html#l00233">netif.h:233</a></div></div>
<div class="ttc" id="astructarp__entry_html_a4cd78dd42071f584f2b8a5ead9f70eaf"><div class="ttname"><a href="structarp__entry.html#a4cd78dd42071f584f2b8a5ead9f70eaf">arp_entry::ethaddr</a></div><div class="ttdeci">struct eth_addr ethaddr</div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00084">arp.c:84</a></div></div>
<div class="ttc" id="aarp_8c_html_aeec8fff4f036cca2ac1b5635fa46d21b"><div class="ttname"><a href="arp_8c.html#aeec8fff4f036cca2ac1b5635fa46d21b">arp_lookup</a></div><div class="ttdeci">struct eth_addr * arp_lookup(struct ip_addr *ipaddr)</div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00260">arp.c:260</a></div></div>
<div class="ttc" id="astructarp__entry_html"><div class="ttname"><a href="structarp__entry.html">arp_entry</a></div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00082">arp.c:82</a></div></div>
<div class="ttc" id="aarp_8c_html_a28a28d3e575df3e75985e2313cc2d51a"><div class="ttname"><a href="arp_8c.html#a28a28d3e575df3e75985e2313cc2d51a">HWTYPE_ETHERNET</a></div><div class="ttdeci">#define HWTYPE_ETHERNET</div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00048">arp.c:48</a></div></div>
<div class="ttc" id="agroup__pbuf_html_ggab7e0e32fcc292c0d7107721766ed92fbac5e9f28455bca98944a030d4b84ecfab"><div class="ttname"><a href="group__pbuf.html#ggab7e0e32fcc292c0d7107721766ed92fbac5e9f28455bca98944a030d4b84ecfab">PBUF_RAM</a></div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00108">pbuf.h:108</a></div></div>
<div class="ttc" id="astructethip__hdr_html"><div class="ttname"><a href="structethip__hdr.html">ethip_hdr</a></div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00076">arp.c:76</a></div></div>
<div class="ttc" id="aarp_8c_html_a06ba7b414e718081998f2814090debf1"><div class="ttname"><a href="arp_8c.html#a06ba7b414e718081998f2814090debf1">ARP_REPLY</a></div><div class="ttdeci">#define ARP_REPLY</div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00051">arp.c:51</a></div></div>
<div class="ttc" id="astructeth__addr_html"><div class="ttname"><a href="structeth__addr.html">eth_addr</a></div><div class="ttdef"><b>Definition:</b> <a href="prot_2ethernet_8h_source.html#l00058">ethernet.h:58</a></div></div>
<div class="ttc" id="aarp_8c_html_a9d1287b9a80c370797b2ac5c63f70e2e"><div class="ttname"><a href="arp_8c.html#a9d1287b9a80c370797b2ac5c63f70e2e">arp_query</a></div><div class="ttdeci">struct pbuf * arp_query(struct netif *netif, struct eth_addr *ethaddr, struct ip_addr *ipaddr)</div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00273">arp.c:273</a></div></div>
<div class="ttc" id="astructethip__hdr_html_aeaff5bdb00c5618ea94cc70081ba27d9"><div class="ttname"><a href="structethip__hdr.html#aeaff5bdb00c5618ea94cc70081ba27d9">ethip_hdr::PACK_STRUCT_FIELD</a></div><div class="ttdeci">PACK_STRUCT_FIELD(struct eth_hdr eth)</div></div>
<div class="ttc" id="aarp_8c_html_ac8ad5a32790d172fcec2eac97a87ee9f"><div class="ttname"><a href="arp_8c.html#ac8ad5a32790d172fcec2eac97a87ee9f">arp_init</a></div><div class="ttdeci">void arp_init(void)</div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00093">arp.c:93</a></div></div>
<div class="ttc" id="agroup__ethernet_html_gga4f8559808037803168499a3803900339ac95756b20fde70b868ef4185dd221c79"><div class="ttname"><a href="group__ethernet.html#gga4f8559808037803168499a3803900339ac95756b20fde70b868ef4185dd221c79">ETHTYPE_IP</a></div><div class="ttdef"><b>Definition:</b> <a href="prot_2ethernet_8h_source.html#l00110">ethernet.h:110</a></div></div>
<div class="ttc" id="alwipopts_8h_html_a924936a814564dbdb0bc950d255a83b9"><div class="ttname"><a href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a></div><div class="ttdeci">#define ARP_TABLE_SIZE</div><div class="ttdef"><b>Definition:</b> <a href="lwipopts_8h_source.html#l00091">lwipopts.h:91</a></div></div>
<div class="ttc" id="aarp_8c_html_a57a25dd51cf73f048ad5364ecc2f040b"><div class="ttname"><a href="arp_8c.html#a57a25dd51cf73f048ad5364ecc2f040b">arp_arp_input</a></div><div class="ttdeci">struct pbuf * arp_arp_input(struct netif *netif, struct eth_addr *ethaddr, struct pbuf *p)</div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00197">arp.c:197</a></div></div>
<div class="ttc" id="aarp_8c_html_a916d08dbb8f4a38e1e904a8a018b000c"><div class="ttname"><a href="arp_8c.html#a916d08dbb8f4a38e1e904a8a018b000c">arp_ip_input</a></div><div class="ttdeci">void arp_ip_input(struct netif *netif, struct pbuf *p)</div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00181">arp.c:181</a></div></div>
<div class="ttc" id="astructarp__entry_html_a49945e8299d4bf7241c0fd2b5e4d84df"><div class="ttname"><a href="structarp__entry.html#a49945e8299d4bf7241c0fd2b5e4d84df">arp_entry::ctime</a></div><div class="ttdeci">uInt8 ctime</div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00085">arp.c:85</a></div></div>
<div class="ttc" id="akprintf_8h_html_a20b56810edb62a6fe59917015c30848f"><div class="ttname"><a href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a></div><div class="ttdeci">int kprintf(const char *,...)</div><div class="ttdef"><b>Definition:</b> <a href="kprintf_8c_source.html#l00259">kprintf.c:259</a></div></div>
<div class="ttc" id="astructpbuf_html"><div class="ttname"><a href="structpbuf.html">pbuf</a></div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00142">pbuf.h:142</a></div></div>
<div class="ttc" id="agroup__ethernet_html_gga4f8559808037803168499a3803900339a41217db03576ea59c44b28b248c39be5"><div class="ttname"><a href="group__ethernet.html#gga4f8559808037803168499a3803900339a41217db03576ea59c44b28b248c39be5">ETHTYPE_ARP</a></div><div class="ttdef"><b>Definition:</b> <a href="prot_2ethernet_8h_source.html#l00112">ethernet.h:112</a></div></div>
<div class="ttc" id="astructarp__hdr_html"><div class="ttname"><a href="structarp__hdr.html">arp_hdr</a></div><div class="ttdef"><b>Definition:</b> <a href="arp_8c_source.html#l00055">arp.c:55</a></div></div>
<div class="ttc" id="aarp_8c_html_ab335643ec08d519342c9d3834091d6e0"><div class="ttname"><a href="arp_8c.html#ab335643ec08d519342c9d3834091d6e0">PACK_STRUCT_STRUCT</a></div><div class="ttdeci">PACK_STRUCT_BEGIN struct arp_hdr PACK_STRUCT_STRUCT</div></div>
<div class="ttc" id="adebug_8h_html"><div class="ttname"><a href="debug_8h.html">debug.h</a></div></div>
<div class="ttc" id="astructpbuf_html_a8d32dc3e964369d4eec638fc37fbc460"><div class="ttname"><a href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">pbuf::payload</a></div><div class="ttdeci">void * payload</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00147">pbuf.h:147</a></div></div>
<div class="ttc" id="acc_8h_html_a465fef70f294e21cbf4ea51fc342f20e"><div class="ttname"><a href="cc_8h.html#a465fef70f294e21cbf4ea51fc342f20e">PACK_STRUCT_END</a></div><div class="ttdeci">#define PACK_STRUCT_END</div><div class="ttdef"><b>Definition:</b> <a href="cc_8h_source.html#l00009">cc.h:9</a></div></div>
<div class="ttc" id="afat__string_8h_html_a070d2ce7b6bb7e5c05602aa8c308d0c4"><div class="ttname"><a href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a></div><div class="ttdeci">#define NULL</div><div class="ttdef"><b>Definition:</b> <a href="fat__string_8h_source.html#l00017">fat_string.h:17</a></div></div>
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