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<div class="title">etharp.c</div> </div>
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<div class="contents">
<a href="etharp_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="l00014"></a><span class="lineno"> 14</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * Copyright (c) 2001-2003 Swedish Institute of Computer Science.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * Copyright (c) 2003-2004 Leon Woestenberg <leon.woestenberg@axon.tv></span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands.</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without modification,</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * are permitted provided that the following conditions are met:</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * 1. Redistributions of source code must retain the above copyright notice,</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * this list of conditions and the following disclaimer.</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright notice,</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * this list of conditions and the following disclaimer in the documentation</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * and/or other materials provided with the distribution.</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</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="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * derived from this software without specific prior written permission.</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"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</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="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> * This file is part of the lwIP TCP/IP stack.</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> */</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="opt_8h.html">net/opt.h</a>"</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"> 48</span> <span class="preprocessor">#if LWIP_ARP || LWIP_ETHERNET</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"> 50</span> <span class="preprocessor">#include "<a class="code" href="etharp_8h.html">net/etharp.h</a>"</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#include "<a class="code" href="stats_8h.html">net/stats.h</a>"</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#include "<a class="code" href="snmp_8h.html">net/snmp.h</a>"</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#include "<a class="code" href="dhcp_8h.html">net/dhcp.h</a>"</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#include "<a class="code" href="autoip_8h.html">net/autoip.h</a>"</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor">#include "<a class="code" href="f_2ethernet_8h.html">netif/ethernet.h</a>"</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  </div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#include <<a class="code" href="string_8h.html">string.h</a>></span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  </div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor">#ifdef LWIP_HOOK_FILENAME</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor">#include LWIP_HOOK_FILENAME</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  </div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#if LWIP_IPV4 && LWIP_ARP </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="l00064"></a><span class="lineno"> 64</span>  </div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="preprocessor">#define ARP_AGE_REREQUEST_USED_UNICAST (ARP_MAXAGE - 30)</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#define ARP_AGE_REREQUEST_USED_BROADCAST (ARP_MAXAGE - 15)</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  </div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor">#define ARP_MAXPENDING 5</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  </div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="keyword">enum</span> etharp_state {</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  ETHARP_STATE_EMPTY = 0,</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  ETHARP_STATE_PENDING,</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  ETHARP_STATE_STABLE,</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  ETHARP_STATE_STABLE_REREQUESTING_1,</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  ETHARP_STATE_STABLE_REREQUESTING_2</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor">#if ETHARP_SUPPORT_STATIC_ENTRIES</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  ,ETHARP_STATE_STATIC</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="preprocessor">#endif </span><span class="comment">/* ETHARP_SUPPORT_STATIC_ENTRIES */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> };</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="keyword">struct </span>etharp_entry {</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="preprocessor">#if ARP_QUEUEING</span></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>  <span class="keyword">struct </span>etharp_q_entry *q;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="preprocessor">#else </span><span class="comment">/* ARP_QUEUEING */</span><span class="preprocessor"></span></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="keyword">struct </span><a class="code" href="structpbuf.html">pbuf</a> *q;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="preprocessor">#endif </span><span class="comment">/* ARP_QUEUEING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  ip4_addr_t ipaddr;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keyword">struct </span><a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keyword">struct </span><a class="code" href="structeth__addr.html">eth_addr</a> ethaddr;</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> ctime;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> state;</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>  </div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="keyword">static</span> <span class="keyword">struct </span>etharp_entry arp_table[<a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>];</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> <span class="preprocessor">#if !LWIP_NETIF_HWADDRHINT</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="keyword">static</span> <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> etharp_cached_entry;</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="preprocessor">#endif </span><span class="comment">/* !LWIP_NETIF_HWADDRHINT */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  </div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="preprocessor">#define ETHARP_FLAG_TRY_HARD 1</span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="preprocessor">#define ETHARP_FLAG_FIND_ONLY 2</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="preprocessor">#if ETHARP_SUPPORT_STATIC_ENTRIES</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="preprocessor">#define ETHARP_FLAG_STATIC_ENTRY 4</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="preprocessor">#endif </span><span class="comment">/* ETHARP_SUPPORT_STATIC_ENTRIES */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  </div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="preprocessor">#if LWIP_NETIF_HWADDRHINT</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="preprocessor">#define ETHARP_SET_HINT(netif, hint) if (((netif) != NULL) && ((netif)->addr_hint != NULL)) \</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="preprocessor"> *((netif)->addr_hint) = (hint);</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="preprocessor">#else </span><span class="comment">/* LWIP_NETIF_HWADDRHINT */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="preprocessor">#define ETHARP_SET_HINT(netif, hint) (etharp_cached_entry = (hint))</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_NETIF_HWADDRHINT */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</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">/* Some checks, instead of etharp_init(): */</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="preprocessor">#if (LWIP_ARP && (ARP_TABLE_SIZE > 0x7f))</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="preprocessor"> #error "ARP_TABLE_SIZE must fit in an s8_t, you have to reduce it in your lwipopts.h"</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  </div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  </div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="keyword">static</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> etharp_request_dst(<span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>, <span class="keyword">const</span> ip4_addr_t *ipaddr, <span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a>* hw_dst_addr);</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="keyword">static</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> etharp_raw(<span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>,</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *ethsrc_addr, <span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *ethdst_addr,</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *hwsrc_addr, <span class="keyword">const</span> ip4_addr_t *ipsrc_addr,</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *hwdst_addr, <span class="keyword">const</span> ip4_addr_t *ipdst_addr,</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keyword">const</span> <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> opcode);</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  </div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="preprocessor">#if ARP_QUEUEING</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  </div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> free_etharp_q(<span class="keyword">struct</span> etharp_q_entry *q)</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> {</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keyword">struct </span>etharp_q_entry *r;</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"q != NULL"</span>, q != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"q->p != NULL"</span>, q->p != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keywordflow">while</span> (q) {</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  r = q;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  q = q->next;</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"r->p != NULL"</span>, (r->p != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>));</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(r->p);</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <a class="code" href="memp_8h.html#aecd94926b7c2a0e23ae195f4ae97581f">memp_free</a>(MEMP_ARP_QUEUE, r);</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  }</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> }</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="preprocessor">#else </span><span class="comment">/* ARP_QUEUEING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  </div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="preprocessor">#define free_etharp_q(q) pbuf_free(q)</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> <span class="preprocessor">#endif </span><span class="comment">/* ARP_QUEUEING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  </div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> etharp_free_entry(<span class="keywordtype">int</span> i)</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> {</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="comment">/* remove from SNMP ARP index tree */</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <a class="code" href="snmp_8h.html#a8f86f7f089ed2ecf4ed14aa01db3b173">mib2_remove_arp_entry</a>(arp_table[i].<a class="code" href="structnetif.html">netif</a>, &arp_table[i].ipaddr);</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="comment">/* and empty packet queue */</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">if</span> (arp_table[i].q != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="comment">/* remove all queued packets */</span></div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a>, (<span class="stringliteral">"etharp_free_entry: freeing entry %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">", packet queue %p.\n"</span>, (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)i, (<span class="keywordtype">void</span> *)(arp_table[i].q)));</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  free_etharp_q(arp_table[i].q);</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  arp_table[i].q = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  }</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="comment">/* recycle entry for re-use */</span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  arp_table[i].state = ETHARP_STATE_EMPTY;</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="preprocessor">#ifdef LWIP_DEBUG</span></div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="comment">/* for debugging, clean out the complete entry */</span></div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  arp_table[i].ctime = 0;</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  arp_table[i].netif = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  ip4_addr_set_zero(&arp_table[i].ipaddr);</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  arp_table[i].ethaddr = ethzero;</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_DEBUG */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> }</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  </div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> etharp_tmr(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> {</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> i;</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  </div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a>, (<span class="stringliteral">"etharp_timer\n"</span>));</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="comment">/* remove expired entries from the ARP table */</span></div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</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="l00206"></a><span class="lineno"> 206</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> state = arp_table[i].state;</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keywordflow">if</span> (state != ETHARP_STATE_EMPTY</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span> #<span class="keywordflow">if</span> <a class="code" href="lwipopts_8h.html#a4675829464156f3d665f4de171c212d7">ETHARP_SUPPORT_STATIC_ENTRIES</a></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  && (state != ETHARP_STATE_STATIC)</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span> #endif <span class="comment">/* ETHARP_SUPPORT_STATIC_ENTRIES */</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>  arp_table[i].ctime++;</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">if</span> ((arp_table[i].ctime >= <a class="code" href="lwipopts_8h.html#a741a0710dc126ed3ae9e305472df3432">ARP_MAXAGE</a>) ||</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  ((arp_table[i].state == ETHARP_STATE_PENDING) &&</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  (arp_table[i].ctime >= ARP_MAXPENDING))) {</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="comment">/* pending or stable entry has become old! */</span></div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a>, (<span class="stringliteral">"etharp_timer: expired %s entry %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".\n"</span>,</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  arp_table[i].state >= ETHARP_STATE_STABLE ? <span class="stringliteral">"stable"</span> : <span class="stringliteral">"pending"</span>, (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)i));</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="comment">/* clean up entries that have just been expired */</span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  etharp_free_entry(i);</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (arp_table[i].state == ETHARP_STATE_STABLE_REREQUESTING_1) {</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="comment">/* Don't send more than one request every 2 seconds. */</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  arp_table[i].state = ETHARP_STATE_STABLE_REREQUESTING_2;</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (arp_table[i].state == ETHARP_STATE_STABLE_REREQUESTING_2) {</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="comment">/* Reset state to stable, so that the next transmitted packet will</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment"> re-send an ARP request. */</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  arp_table[i].state = ETHARP_STATE_STABLE;</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (arp_table[i].state == ETHARP_STATE_PENDING) {</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="comment">/* still pending, resend an ARP query */</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  etharp_request(arp_table[i].<a class="code" href="structnetif.html">netif</a>, &arp_table[i].ipaddr);</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>  }</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> }</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  </div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> <span class="keyword">static</span> <a class="code" href="group__compiler__abstraction.html#ga9cd1d7891fe315de1201e2c6e45f4f57">s8_t</a></div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> etharp_find_entry(<span class="keyword">const</span> ip4_addr_t *ipaddr, <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> flags, <span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a>* <a class="code" href="structnetif.html">netif</a>)</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span> {</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <a class="code" href="group__compiler__abstraction.html#ga9cd1d7891fe315de1201e2c6e45f4f57">s8_t</a> old_pending = <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>, old_stable = <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>;</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <a class="code" href="group__compiler__abstraction.html#ga9cd1d7891fe315de1201e2c6e45f4f57">s8_t</a> empty = <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>;</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> i = 0;</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="comment">/* oldest entry with packets on queue */</span></div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <a class="code" href="group__compiler__abstraction.html#ga9cd1d7891fe315de1201e2c6e45f4f57">s8_t</a> old_queue = <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>;</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="comment">/* its age */</span></div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> age_queue = 0, age_pending = 0, age_stable = 0;</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>  <a class="code" href="group__compiler__abstraction.html#ga70624a5deb8b9199406372a7f3603ecf">LWIP_UNUSED_ARG</a>(<a class="code" href="structnetif.html">netif</a>);</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  </div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="comment">/* a) in a single search sweep, do all of this</span></div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> <span class="comment"> * 1) remember the first empty entry (if any)</span></div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> <span class="comment"> * 2) remember the oldest stable entry (if any)</span></div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span> <span class="comment"> * 3) remember the oldest pending entry without queued packets (if any)</span></div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span> <span class="comment"> * 4) remember the oldest pending entry with queued packets (if any)</span></div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> <span class="comment"> * 5) search for a matching IP entry, either pending or stable</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="comment"> * until 5 matches, or all entries are searched for.</span></div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  </div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</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="l00286"></a><span class="lineno"> 286</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> state = arp_table[i].state;</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="comment">/* no empty entry found yet and now we do find one? */</span></div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordflow">if</span> ((empty == <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>) && (state == ETHARP_STATE_EMPTY)) {</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a>, (<span class="stringliteral">"etharp_find_entry: found empty entry %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"\n"</span>, (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)i));</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="comment">/* remember first empty entry */</span></div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  empty = i;</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (state != ETHARP_STATE_EMPTY) {</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"state == ETHARP_STATE_PENDING || state >= ETHARP_STATE_STABLE"</span>,</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  state == ETHARP_STATE_PENDING || state >= ETHARP_STATE_STABLE);</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="comment">/* if given, does IP address match IP address in ARP entry? */</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordflow">if</span> (ipaddr && ip4_addr_cmp(ipaddr, &arp_table[i].ipaddr)</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> #<span class="keywordflow">if</span> <a class="code" href="lwipopts_8h.html#a2f762eee309a545650f80fc8dcc19084">ETHARP_TABLE_MATCH_NETIF</a></div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  && ((<a class="code" href="structnetif.html">netif</a> == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) || (<a class="code" href="structnetif.html">netif</a> == arp_table[i].<a class="code" href="structnetif.html">netif</a>))</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span> #endif <span class="comment">/* ETHARP_TABLE_MATCH_NETIF */</span></div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  ) {</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_find_entry: found matching entry %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"\n"</span>, (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)i));</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="comment">/* found exact IP address match, simply bail out */</span></div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keywordflow">return</span> i;</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  }</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="comment">/* pending entry? */</span></div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keywordflow">if</span> (state == ETHARP_STATE_PENDING) {</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="comment">/* pending with queued packets? */</span></div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordflow">if</span> (arp_table[i].q != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordflow">if</span> (arp_table[i].ctime >= age_queue) {</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  old_queue = i;</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  age_queue = arp_table[i].ctime;</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>  } <span class="keywordflow">else</span></div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="comment">/* pending without queued packets? */</span></div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  {</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keywordflow">if</span> (arp_table[i].ctime >= age_pending) {</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  old_pending = i;</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  age_pending = arp_table[i].ctime;</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  }</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>  <span class="comment">/* stable entry? */</span></div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (state >= ETHARP_STATE_STABLE) {</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span> <span class="preprocessor">#if ETHARP_SUPPORT_STATIC_ENTRIES</span></div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="comment">/* don't record old_stable for static entries since they never expire */</span></div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keywordflow">if</span> (state < ETHARP_STATE_STATIC)</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> <span class="preprocessor">#endif </span><span class="comment">/* ETHARP_SUPPORT_STATIC_ENTRIES */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  {</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="comment">/* remember entry with oldest stable entry in oldest, its age in maxtime */</span></div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  <span class="keywordflow">if</span> (arp_table[i].ctime >= age_stable) {</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  old_stable = i;</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  age_stable = arp_table[i].ctime;</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  }</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  }</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>  }</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  }</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  <span class="comment">/* { we have no match } => try to create a new entry */</span></div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  </div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  <span class="comment">/* don't create new entry, only search? */</span></div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keywordflow">if</span> (((flags & ETHARP_FLAG_FIND_ONLY) != 0) ||</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="comment">/* or no empty entry found and not allowed to recycle? */</span></div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  ((empty == <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>) && ((flags & ETHARP_FLAG_TRY_HARD) == 0))) {</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_find_entry: no empty entry found and not allowed to recycle\n"</span>));</div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keywordflow">return</span> (<a class="code" href="group__compiler__abstraction.html#ga9cd1d7891fe315de1201e2c6e45f4f57">s8_t</a>)<a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaaaeafdbf3aecc46864daa3cd829c7e05">ERR_MEM</a>;</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  }</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  </div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="comment">/* b) choose the least destructive entry to recycle:</span></div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span> <span class="comment"> * 1) empty entry</span></div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span> <span class="comment"> * 2) oldest stable entry</span></div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span> <span class="comment"> * 3) oldest pending entry without queued packets</span></div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span> <span class="comment"> * 4) oldest pending entry with queued packets</span></div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span> <span class="comment"> * { ETHARP_FLAG_TRY_HARD is set at this point }</span></div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> <span class="comment"> */</span></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>  <span class="comment">/* 1) empty entry available? */</span></div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <span class="keywordflow">if</span> (empty < <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>) {</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  i = empty;</div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_find_entry: selecting empty entry %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"\n"</span>, (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)i));</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="comment">/* 2) found recyclable stable entry? */</span></div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <span class="keywordflow">if</span> (old_stable < <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>) {</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <span class="comment">/* recycle oldest stable*/</span></div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  i = old_stable;</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_find_entry: selecting oldest stable entry %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"\n"</span>, (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)i));</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="comment">/* no queued packets should exist on stable entries */</span></div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"arp_table[i].q == NULL"</span>, arp_table[i].q == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="comment">/* 3) found recyclable pending entry without queued packets? */</span></div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (old_pending < <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>) {</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="comment">/* recycle oldest pending */</span></div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  i = old_pending;</div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_find_entry: selecting oldest pending entry %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" (without queue)\n"</span>, (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)i));</div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <span class="comment">/* 4) found recyclable pending entry with queued packets? */</span></div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (old_queue < <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>) {</div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="comment">/* recycle oldest pending (queued packets are free in etharp_free_entry) */</span></div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  i = old_queue;</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_find_entry: selecting oldest pending entry %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">", freeing packet queue %p\n"</span>, (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)i, (<span class="keywordtype">void</span> *)(arp_table[i].q)));</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="comment">/* no empty or recyclable entries found */</span></div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_find_entry: no empty or recyclable entries found\n"</span>));</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <span class="keywordflow">return</span> (<a class="code" href="group__compiler__abstraction.html#ga9cd1d7891fe315de1201e2c6e45f4f57">s8_t</a>)<a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaaaeafdbf3aecc46864daa3cd829c7e05">ERR_MEM</a>;</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  }</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  </div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="comment">/* { empty or recyclable entry found } */</span></div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"i < ARP_TABLE_SIZE"</span>, i < <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>);</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  etharp_free_entry(i);</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  }</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  </div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"i < ARP_TABLE_SIZE"</span>, i < <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>);</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"arp_table[i].state == ETHARP_STATE_EMPTY"</span>,</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  arp_table[i].state == ETHARP_STATE_EMPTY);</div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  </div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <span class="comment">/* IP address given? */</span></div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <span class="keywordflow">if</span> (ipaddr != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  <span class="comment">/* set IP address */</span></div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  ip4_addr_copy(arp_table[i].ipaddr, *ipaddr);</div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  }</div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  arp_table[i].ctime = 0;</div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span> <span class="preprocessor">#if ETHARP_TABLE_MATCH_NETIF</span></div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  arp_table[i].netif = <a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span> <span class="preprocessor">#endif </span><span class="comment">/* ETHARP_TABLE_MATCH_NETIF*/</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  <span class="keywordflow">return</span> (<a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a>)i;</div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span> }</div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  </div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span> <span class="keyword">static</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span> etharp_update_arp_entry(<span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>, <span class="keyword">const</span> ip4_addr_t *ipaddr, <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *ethaddr, <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> flags)</div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span> {</div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <a class="code" href="group__compiler__abstraction.html#ga9cd1d7891fe315de1201e2c6e45f4f57">s8_t</a> i;</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"netif->hwaddr_len == ETH_HWADDR_LEN"</span>, <a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#afe1181561cb16241f3cb5ed01e567d42">hwaddr_len</a> == <a class="code" href="prot_2ethernet_8h.html#ac9426049770b40fcd9556ffbd7e56907">ETH_HWADDR_LEN</a>);</div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_update_arp_entry: %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" - %02"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">":%02"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">":%02"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">":%02"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">":%02"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">":%02"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">"\n"</span>,</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr),</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)ethaddr->addr[0], (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)ethaddr->addr[1], (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)ethaddr->addr[2],</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)ethaddr->addr[3], (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)ethaddr->addr[4], (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)ethaddr->addr[5]));</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="comment">/* non-unicast address? */</span></div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <span class="keywordflow">if</span> (ip4_addr_isany(ipaddr) ||</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  ip4_addr_isbroadcast(ipaddr, <a class="code" href="structnetif.html">netif</a>) ||</div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  ip4_addr_ismulticast(ipaddr)) {</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_update_arp_entry: will not add non-unicast IP address to ARP cache\n"</span>));</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcab508ce0ebdf3ca735208b00a80a45c91">ERR_ARG</a>;</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  }</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  <span class="comment">/* find or create ARP entry */</span></div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  i = etharp_find_entry(ipaddr, flags, <a class="code" href="structnetif.html">netif</a>);</div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  <span class="comment">/* bail out if no entry could be found */</span></div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <span class="keywordflow">if</span> (i < 0) {</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  <span class="keywordflow">return</span> (<a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a>)i;</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  }</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  </div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span> <span class="preprocessor">#if ETHARP_SUPPORT_STATIC_ENTRIES</span></div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  <span class="keywordflow">if</span> (flags & ETHARP_FLAG_STATIC_ENTRY) {</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  <span class="comment">/* record static type */</span></div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  arp_table[i].state = ETHARP_STATE_STATIC;</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (arp_table[i].state == ETHARP_STATE_STATIC) {</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="comment">/* found entry is a static type, don't overwrite it */</span></div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa9a1c5a6fdeed0aad7fe41d538482bbd">ERR_VAL</a>;</div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  } <span class="keywordflow">else</span></div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span> <span class="preprocessor">#endif </span><span class="comment">/* ETHARP_SUPPORT_STATIC_ENTRIES */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  {</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  <span class="comment">/* mark it stable */</span></div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  arp_table[i].state = ETHARP_STATE_STABLE;</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  }</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  </div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <span class="comment">/* record network interface */</span></div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  arp_table[i].netif = <a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  <span class="comment">/* insert in SNMP ARP index tree */</span></div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  <a class="code" href="snmp_8h.html#adb03de79d2e1fc600c78d8f72a757f34">mib2_add_arp_entry</a>(<a class="code" href="structnetif.html">netif</a>, &arp_table[i].ipaddr);</div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  </div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_update_arp_entry: updating stable entry %"</span><a class="code" href="group__compiler__abstraction.html#gac05a82d37afb251470f5e17ca15ab6e9">S16_F</a><span class="stringliteral">"\n"</span>, (<a class="code" href="group__compiler__abstraction.html#gacf46f4df0ebab84edebcb69967fdf86b">s16_t</a>)i));</div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="comment">/* update address */</span></div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <a class="code" href="prot_2ethernet_8h.html#a0622da8fb6eb72cd4cd7c3ea4f5a5b79">ETHADDR32_COPY</a>(&arp_table[i].ethaddr, ethaddr);</div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  <span class="comment">/* reset time stamp */</span></div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  arp_table[i].ctime = 0;</div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  <span class="comment">/* this is where we will send out queued packets! */</span></div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span> <span class="preprocessor">#if ARP_QUEUEING</span></div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  <span class="keywordflow">while</span> (arp_table[i].q != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  <span class="keyword">struct </span><a class="code" href="structpbuf.html">pbuf</a> *p;</div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  <span class="comment">/* remember remainder of queue */</span></div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  <span class="keyword">struct </span>etharp_q_entry *q = arp_table[i].q;</div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  <span class="comment">/* pop first item off the queue */</span></div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  arp_table[i].q = q-><a class="code" href="structpbuf.html#a5e5763c94fd18d78937b0b58ce7df341">next</a>;</div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  <span class="comment">/* get the packet pointer */</span></div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  p = q->p;</div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  <span class="comment">/* now queue entry can be freed */</span></div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  <a class="code" href="memp_8h.html#aecd94926b7c2a0e23ae195f4ae97581f">memp_free</a>(MEMP_ARP_QUEUE, q);</div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span> <span class="preprocessor">#else </span><span class="comment">/* ARP_QUEUEING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  <span class="keywordflow">if</span> (arp_table[i].q != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  <span class="keyword">struct </span><a class="code" href="structpbuf.html">pbuf</a> *p = arp_table[i].q;</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  arp_table[i].q = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span> <span class="preprocessor">#endif </span><span class="comment">/* ARP_QUEUEING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  <span class="comment">/* send the queued IP packet */</span></div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  ethernet_output(<a class="code" href="structnetif.html">netif</a>, p, (<span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a>*)(<a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#aee967965d999fc1a4c40a66709304e69">hwaddr</a>), ethaddr, <a class="code" href="group__ethernet.html#gga4f8559808037803168499a3803900339ac95756b20fde70b868ef4185dd221c79">ETHTYPE_IP</a>);</div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  <span class="comment">/* free the queued IP packet */</span></div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  }</div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span> }</div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  </div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span> <span class="preprocessor">#if ETHARP_SUPPORT_STATIC_ENTRIES</span></div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  </div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span> etharp_add_static_entry(<span class="keyword">const</span> ip4_addr_t *ipaddr, <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *ethaddr)</div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span> {</div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  <span class="keyword">struct </span><a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_add_static_entry: %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" - %02"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">":%02"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">":%02"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">":%02"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">":%02"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">":%02"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">"\n"</span>,</div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr),</div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)ethaddr->addr[0], (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)ethaddr->addr[1], (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)ethaddr->addr[2],</div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)ethaddr->addr[3], (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)ethaddr->addr[4], (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)ethaddr->addr[5]));</div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  </div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  <a class="code" href="structnetif.html">netif</a> = ip4_route(ipaddr);</div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  <span class="keywordflow">if</span> (<a class="code" href="structnetif.html">netif</a> == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadca9448893187313c0c5a502ca9a9ad1c2a">ERR_RTE</a>;</div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  }</div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  </div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  <span class="keywordflow">return</span> etharp_update_arp_entry(<a class="code" href="structnetif.html">netif</a>, ipaddr, ethaddr, ETHARP_FLAG_TRY_HARD | ETHARP_FLAG_STATIC_ENTRY);</div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span> }</div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  </div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span> etharp_remove_static_entry(<span class="keyword">const</span> ip4_addr_t *ipaddr)</div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span> {</div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  <a class="code" href="group__compiler__abstraction.html#ga9cd1d7891fe315de1201e2c6e45f4f57">s8_t</a> i;</div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_remove_static_entry: %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"\n"</span>,</div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  ip4_addr1_16(ipaddr), ip4_addr2_16(ipaddr), ip4_addr3_16(ipaddr), ip4_addr4_16(ipaddr)));</div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  </div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  <span class="comment">/* find or create ARP entry */</span></div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  i = etharp_find_entry(ipaddr, ETHARP_FLAG_FIND_ONLY, <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  <span class="comment">/* bail out if no entry could be found */</span></div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  <span class="keywordflow">if</span> (i < 0) {</div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <span class="keywordflow">return</span> (<a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a>)i;</div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  }</div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  </div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  <span class="keywordflow">if</span> (arp_table[i].<a class="code" href="structnetif.html#a809cc57c0dff09c5c9ae45b02c2002f3">state</a> != ETHARP_STATE_STATIC) {</div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <span class="comment">/* entry wasn't a static entry, cannot remove it */</span></div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcab508ce0ebdf3ca735208b00a80a45c91">ERR_ARG</a>;</div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  }</div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  <span class="comment">/* entry found, free it */</span></div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  etharp_free_entry(i);</div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span> }</div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span> <span class="preprocessor">#endif </span><span class="comment">/* ETHARP_SUPPORT_STATIC_ENTRIES */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  </div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span> etharp_cleanup_netif(<span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>)</div>
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span> {</div>
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> i;</div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  </div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</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="l00564"></a><span class="lineno"> 564</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> <a class="code" href="structnetif.html#a809cc57c0dff09c5c9ae45b02c2002f3">state</a> = arp_table[i].state;</div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  <span class="keywordflow">if</span> ((<a class="code" href="structnetif.html#a809cc57c0dff09c5c9ae45b02c2002f3">state</a> != ETHARP_STATE_EMPTY) && (arp_table[i].<a class="code" href="structnetif.html">netif</a> == <a class="code" href="structnetif.html">netif</a>)) {</div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  etharp_free_entry(i);</div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  }</div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  }</div>
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span> }</div>
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  </div>
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span> <a class="code" href="group__compiler__abstraction.html#ga9cd1d7891fe315de1201e2c6e45f4f57">s8_t</a></div>
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span> etharp_find_addr(<span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>, <span class="keyword">const</span> ip4_addr_t *ipaddr,</div>
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> **eth_ret, <span class="keyword">const</span> ip4_addr_t **ip_ret)</div>
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span> {</div>
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  <a class="code" href="group__compiler__abstraction.html#ga9cd1d7891fe315de1201e2c6e45f4f57">s8_t</a> i;</div>
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  </div>
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"eth_ret != NULL && ip_ret != NULL"</span>,</div>
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  eth_ret != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a> && ip_ret != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  </div>
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  <a class="code" href="group__compiler__abstraction.html#ga70624a5deb8b9199406372a7f3603ecf">LWIP_UNUSED_ARG</a>(<a class="code" href="structnetif.html">netif</a>);</div>
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span>  </div>
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  i = etharp_find_entry(ipaddr, ETHARP_FLAG_FIND_ONLY, <a class="code" href="structnetif.html">netif</a>);</div>
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  <span class="keywordflow">if</span> ((i >= 0) && (arp_table[i].<a class="code" href="structnetif.html#a809cc57c0dff09c5c9ae45b02c2002f3">state</a> >= ETHARP_STATE_STABLE)) {</div>
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  *eth_ret = &arp_table[i].ethaddr;</div>
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  *ip_ret = &arp_table[i].ipaddr;</div>
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  <span class="keywordflow">return</span> i;</div>
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  }</div>
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span> }</div>
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  </div>
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span> <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a></div>
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span> etharp_get_entry(<a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> i, ip4_addr_t **ipaddr, <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> **eth_ret)</div>
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span> {</div>
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"ipaddr != NULL"</span>, ipaddr != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"netif != NULL"</span>, <a class="code" href="structnetif.html">netif</a> != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"eth_ret != NULL"</span>, eth_ret != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  </div>
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  <span class="keywordflow">if</span>((i < <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>) && (arp_table[i].<a class="code" href="structnetif.html#a809cc57c0dff09c5c9ae45b02c2002f3">state</a> >= ETHARP_STATE_STABLE)) {</div>
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  *ipaddr = &arp_table[i].ipaddr;</div>
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  *<a class="code" href="structnetif.html">netif</a> = arp_table[i].netif;</div>
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  *eth_ret = &arp_table[i].ethaddr;</div>
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  }</div>
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span> }</div>
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  </div>
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span> etharp_input(<span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *p, <span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>)</div>
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span> {</div>
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  <span class="keyword">struct </span><a class="code" href="structetharp__hdr.html">etharp_hdr</a> *hdr;</div>
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  <span class="comment">/* these are aligned properly, whereas the ARP header fields might not be */</span></div>
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  ip4_addr_t sipaddr, dipaddr;</div>
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> for_us;</div>
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  </div>
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  <a class="code" href="debug_8h.html#a827bc03cd7889e7c007df39d33b33d18">LWIP_ERROR</a>(<span class="stringliteral">"netif != NULL"</span>, (<a class="code" href="structnetif.html">netif</a> != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>), <span class="keywordflow">return</span>;);</div>
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  </div>
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  hdr = (<span class="keyword">struct </span><a class="code" href="structetharp__hdr.html">etharp_hdr</a> *)p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  </div>
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  <span class="comment">/* RFC 826 "Packet Reception": */</span></div>
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  if ((hdr->hwtype != <a class="code" href="def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a>(<a class="code" href="prot_2etharp_8h.html#a2bfef84e6dba235e7019834a4b493a66a6e4adc4f5f733878a0173c6fb98a5f93">HWTYPE_ETHERNET</a>)) ||</div>
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  (hdr->hwlen != <a class="code" href="prot_2ethernet_8h.html#ac9426049770b40fcd9556ffbd7e56907">ETH_HWADDR_LEN</a>) ||</div>
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  (hdr->protolen != <span class="keyword">sizeof</span>(ip4_addr_t)) ||</div>
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  (hdr->proto != <a class="code" href="def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a>(<a class="code" href="group__ethernet.html#gga4f8559808037803168499a3803900339ac95756b20fde70b868ef4185dd221c79">ETHTYPE_IP</a>))) {</div>
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a> | <a class="code" href="group__debugging__levels.html#ga77c491e468bf7d9a1bc48430c1866a96">LWIP_DBG_LEVEL_WARNING</a>,</div>
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  (<span class="stringliteral">"etharp_input: packet dropped, wrong hw type, hwlen, proto, protolen or ethernet type (%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"/%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"/%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"/%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">")\n"</span>,</div>
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  hdr->hwtype, (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)hdr->hwlen, hdr->proto, (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)hdr->protolen));</div>
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  <a class="code" href="stats_8h.html#aea3a36c64f7159af04b7acc985402edc">ETHARP_STATS_INC</a>(etharp.proterr);</div>
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  <a class="code" href="stats_8h.html#aea3a36c64f7159af04b7acc985402edc">ETHARP_STATS_INC</a>(etharp.drop);</div>
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  }</div>
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  <a class="code" href="stats_8h.html#aea3a36c64f7159af04b7acc985402edc">ETHARP_STATS_INC</a>(etharp.recv);</div>
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  </div>
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span> <span class="preprocessor">#if LWIP_AUTOIP</span></div>
<div class="line"><a name="l00668"></a><span class="lineno"> 668</span>  <span class="comment">/* We have to check if a host already has configured our random</span></div>
<div class="line"><a name="l00669"></a><span class="lineno"> 669</span> <span class="comment"> * created link local address and continuously check if there is</span></div>
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span> <span class="comment"> * a host with this IP-address so we can detect collisions */</span></div>
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  autoip_arp_reply(<a class="code" href="structnetif.html">netif</a>, hdr);</div>
<div class="line"><a name="l00672"></a><span class="lineno"> 672</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_AUTOIP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  </div>
<div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  <span class="comment">/* Copy struct ip4_addr2 to aligned ip4_addr, to support compilers without</span></div>
<div class="line"><a name="l00675"></a><span class="lineno"> 675</span> <span class="comment"> * structure packing (not using structure copy which breaks strict-aliasing rules). */</span></div>
<div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  IPADDR2_COPY(&sipaddr, &hdr->sipaddr);</div>
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  IPADDR2_COPY(&dipaddr, &hdr->dipaddr);</div>
<div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  </div>
<div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  <span class="comment">/* this interface is not configured? */</span></div>
<div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  <span class="keywordflow">if</span> (ip4_addr_isany_val(*netif_ip4_addr(<a class="code" href="structnetif.html">netif</a>))) {</div>
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  for_us = 0;</div>
<div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  <span class="comment">/* ARP packet directed to us? */</span></div>
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span>  for_us = (<a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a>)ip4_addr_cmp(&dipaddr, netif_ip4_addr(<a class="code" href="structnetif.html">netif</a>));</div>
<div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  }</div>
<div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  </div>
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  <span class="comment">/* ARP message directed to us?</span></div>
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span> <span class="comment"> -> add IP address in ARP cache; assume requester wants to talk to us,</span></div>
<div class="line"><a name="l00689"></a><span class="lineno"> 689</span> <span class="comment"> can result in directly sending the queued packets for this host.</span></div>
<div class="line"><a name="l00690"></a><span class="lineno"> 690</span> <span class="comment"> ARP message not directed to us?</span></div>
<div class="line"><a name="l00691"></a><span class="lineno"> 691</span> <span class="comment"> -> update the source IP address in the cache, if present */</span></div>
<div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  etharp_update_arp_entry(<a class="code" href="structnetif.html">netif</a>, &sipaddr, &(hdr->shwaddr),</div>
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  for_us ? ETHARP_FLAG_TRY_HARD : ETHARP_FLAG_FIND_ONLY);</div>
<div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  </div>
<div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  <span class="comment">/* now act on the message itself */</span></div>
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  <span class="keywordflow">switch</span> (hdr->opcode) {</div>
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  <span class="comment">/* ARP request? */</span></div>
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  <span class="keywordflow">case</span> <a class="code" href="def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a>(<a class="code" href="prot_2etharp_8h.html#af8a1068cba34f11d56afb73cdd879cabafb58ccf8b7b11505ff2117a10bf6ff61">ARP_REQUEST</a>):</div>
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  <span class="comment">/* ARP request. If it asked for our address, we send out a</span></div>
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span> <span class="comment"> * reply. In any case, we time-stamp any existing ARP entry,</span></div>
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span> <span class="comment"> * and possibly send out an IP packet that was queued on it. */</span></div>
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span>  </div>
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a> (<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_input: incoming ARP request\n"</span>));</div>
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  <span class="comment">/* ARP request for our address? */</span></div>
<div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  <span class="keywordflow">if</span> (for_us) {</div>
<div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  <span class="comment">/* send ARP response */</span></div>
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span>  etharp_raw(<a class="code" href="structnetif.html">netif</a>,</div>
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  (<span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *)<a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#aee967965d999fc1a4c40a66709304e69">hwaddr</a>, &hdr->shwaddr,</div>
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  (<span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *)<a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#aee967965d999fc1a4c40a66709304e69">hwaddr</a>, netif_ip4_addr(<a class="code" href="structnetif.html">netif</a>),</div>
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span>  &hdr->shwaddr, &sipaddr,</div>
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  <a class="code" href="prot_2etharp_8h.html#af8a1068cba34f11d56afb73cdd879caba8bb24a026264a5b22435864179f874d9">ARP_REPLY</a>);</div>
<div class="line"><a name="l00712"></a><span class="lineno"> 712</span>  <span class="comment">/* we are not configured? */</span></div>
<div class="line"><a name="l00713"></a><span class="lineno"> 713</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (ip4_addr_isany_val(*netif_ip4_addr(<a class="code" href="structnetif.html">netif</a>))) {</div>
<div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  <span class="comment">/* { for_us == 0 and netif->ip_addr.addr == 0 } */</span></div>
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_input: we are unconfigured, ARP request ignored.\n"</span>));</div>
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span>  <span class="comment">/* request was not directed to us */</span></div>
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00718"></a><span class="lineno"> 718</span>  <span class="comment">/* { for_us == 0 and netif->ip_addr.addr != 0 } */</span></div>
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_input: ARP request was not for us.\n"</span>));</div>
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  }</div>
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  <span class="keywordflow">case</span> <a class="code" href="def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a>(<a class="code" href="prot_2etharp_8h.html#af8a1068cba34f11d56afb73cdd879caba8bb24a026264a5b22435864179f874d9">ARP_REPLY</a>):</div>
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  <span class="comment">/* ARP reply. We already updated the ARP cache earlier. */</span></div>
<div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_input: incoming ARP reply\n"</span>));</div>
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span> <span class="preprocessor">#if (LWIP_DHCP && DHCP_DOES_ARP_CHECK)</span></div>
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  <span class="comment">/* DHCP wants to know about ARP replies from any host with an</span></div>
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span> <span class="comment"> * IP address also offered to us by the DHCP server. We do not</span></div>
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span> <span class="comment"> * want to take a duplicate IP address on a single network.</span></div>
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span> <span class="comment"> * @todo How should we handle redundant (fail-over) interfaces? */</span></div>
<div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  dhcp_arp_reply(<a class="code" href="structnetif.html">netif</a>, &sipaddr);</div>
<div class="line"><a name="l00731"></a><span class="lineno"> 731</span> <span class="preprocessor">#endif </span><span class="comment">/* (LWIP_DHCP && DHCP_DOES_ARP_CHECK) */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00733"></a><span class="lineno"> 733</span>  <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_input: ARP unknown opcode type %"</span><a class="code" href="group__compiler__abstraction.html#gac05a82d37afb251470f5e17ca15ab6e9">S16_F</a><span class="stringliteral">"\n"</span>, <a class="code" href="def_8c.html#ad637280639de4066392e6b5614fa3e56">lwip_htons</a>(hdr->opcode)));</div>
<div class="line"><a name="l00735"></a><span class="lineno"> 735</span>  <a class="code" href="stats_8h.html#aea3a36c64f7159af04b7acc985402edc">ETHARP_STATS_INC</a>(etharp.err);</div>
<div class="line"><a name="l00736"></a><span class="lineno"> 736</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  }</div>
<div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  <span class="comment">/* free ARP packet */</span></div>
<div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00740"></a><span class="lineno"> 740</span> }</div>
<div class="line"><a name="l00741"></a><span class="lineno"> 741</span>  </div>
<div class="line"><a name="l00745"></a><span class="lineno"> 745</span> <span class="keyword">static</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l00746"></a><span class="lineno"> 746</span> etharp_output_to_arp_index(<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> *q, <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> arp_idx)</div>
<div class="line"><a name="l00747"></a><span class="lineno"> 747</span> {</div>
<div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"arp_table[arp_idx].state >= ETHARP_STATE_STABLE"</span>,</div>
<div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  arp_table[arp_idx].state >= ETHARP_STATE_STABLE);</div>
<div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  <span class="comment">/* if arp table entry is about to expire: re-request it,</span></div>
<div class="line"><a name="l00751"></a><span class="lineno"> 751</span> <span class="comment"> but only if its state is ETHARP_STATE_STABLE to prevent flooding the</span></div>
<div class="line"><a name="l00752"></a><span class="lineno"> 752</span> <span class="comment"> network with ARP requests if this address is used frequently. */</span></div>
<div class="line"><a name="l00753"></a><span class="lineno"> 753</span>  <span class="keywordflow">if</span> (arp_table[arp_idx].state == ETHARP_STATE_STABLE) {</div>
<div class="line"><a name="l00754"></a><span class="lineno"> 754</span>  <span class="keywordflow">if</span> (arp_table[arp_idx].ctime >= ARP_AGE_REREQUEST_USED_BROADCAST) {</div>
<div class="line"><a name="l00755"></a><span class="lineno"> 755</span>  <span class="comment">/* issue a standard request using broadcast */</span></div>
<div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  <span class="keywordflow">if</span> (etharp_request(<a class="code" href="structnetif.html">netif</a>, &arp_table[arp_idx].ipaddr) == <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>) {</div>
<div class="line"><a name="l00757"></a><span class="lineno"> 757</span>  arp_table[arp_idx].state = ETHARP_STATE_STABLE_REREQUESTING_1;</div>
<div class="line"><a name="l00758"></a><span class="lineno"> 758</span>  }</div>
<div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (arp_table[arp_idx].ctime >= ARP_AGE_REREQUEST_USED_UNICAST) {</div>
<div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  <span class="comment">/* issue a unicast request (for 15 seconds) to prevent unnecessary broadcast */</span></div>
<div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  <span class="keywordflow">if</span> (etharp_request_dst(<a class="code" href="structnetif.html">netif</a>, &arp_table[arp_idx].ipaddr, &arp_table[arp_idx].ethaddr) == <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>) {</div>
<div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  arp_table[arp_idx].state = ETHARP_STATE_STABLE_REREQUESTING_1;</div>
<div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  }</div>
<div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  }</div>
<div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  }</div>
<div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  </div>
<div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  <span class="keywordflow">return</span> ethernet_output(<a class="code" href="structnetif.html">netif</a>, q, (<span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a>*)(<a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#aee967965d999fc1a4c40a66709304e69">hwaddr</a>), &arp_table[arp_idx].ethaddr, <a class="code" href="group__ethernet.html#gga4f8559808037803168499a3803900339ac95756b20fde70b868ef4185dd221c79">ETHTYPE_IP</a>);</div>
<div class="line"><a name="l00768"></a><span class="lineno"> 768</span> }</div>
<div class="line"><a name="l00769"></a><span class="lineno"> 769</span>  </div>
<div class="line"><a name="l00788"></a><span class="lineno"> 788</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l00789"></a><span class="lineno"> 789</span> etharp_output(<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> *q, <span class="keyword">const</span> ip4_addr_t *ipaddr)</div>
<div class="line"><a name="l00790"></a><span class="lineno"> 790</span> {</div>
<div class="line"><a name="l00791"></a><span class="lineno"> 791</span>  <span class="keyword">const</span> <span class="keyword">struct </span><a class="code" href="structeth__addr.html">eth_addr</a> *dest;</div>
<div class="line"><a name="l00792"></a><span class="lineno"> 792</span>  <span class="keyword">struct </span><a class="code" href="structeth__addr.html">eth_addr</a> mcastaddr;</div>
<div class="line"><a name="l00793"></a><span class="lineno"> 793</span>  <span class="keyword">const</span> ip4_addr_t *dst_addr = ipaddr;</div>
<div class="line"><a name="l00794"></a><span class="lineno"> 794</span>  </div>
<div class="line"><a name="l00795"></a><span class="lineno"> 795</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"netif != NULL"</span>, <a class="code" href="structnetif.html">netif</a> != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00796"></a><span class="lineno"> 796</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"q != NULL"</span>, q != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00797"></a><span class="lineno"> 797</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"ipaddr != NULL"</span>, ipaddr != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00798"></a><span class="lineno"> 798</span>  </div>
<div class="line"><a name="l00799"></a><span class="lineno"> 799</span>  <span class="comment">/* Determine on destination hardware address. Broadcasts and multicasts</span></div>
<div class="line"><a name="l00800"></a><span class="lineno"> 800</span> <span class="comment"> * are special, other IP addresses are looked up in the ARP table. */</span></div>
<div class="line"><a name="l00801"></a><span class="lineno"> 801</span>  </div>
<div class="line"><a name="l00802"></a><span class="lineno"> 802</span>  <span class="comment">/* broadcast destination IP address? */</span></div>
<div class="line"><a name="l00803"></a><span class="lineno"> 803</span>  <span class="keywordflow">if</span> (ip4_addr_isbroadcast(ipaddr, <a class="code" href="structnetif.html">netif</a>)) {</div>
<div class="line"><a name="l00804"></a><span class="lineno"> 804</span>  <span class="comment">/* broadcast on Ethernet also */</span></div>
<div class="line"><a name="l00805"></a><span class="lineno"> 805</span>  dest = (<span class="keyword">const</span> <span class="keyword">struct </span><a class="code" href="structeth__addr.html">eth_addr</a> *)&ethbroadcast;</div>
<div class="line"><a name="l00806"></a><span class="lineno"> 806</span>  <span class="comment">/* multicast destination IP address? */</span></div>
<div class="line"><a name="l00807"></a><span class="lineno"> 807</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (ip4_addr_ismulticast(ipaddr)) {</div>
<div class="line"><a name="l00808"></a><span class="lineno"> 808</span>  <span class="comment">/* Hash IP multicast address to MAC address.*/</span></div>
<div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  mcastaddr.addr[0] = <a class="code" href="prot_2ethernet_8h.html#afaf6cbccf9477c3505660e3a17860e07">LL_IP4_MULTICAST_ADDR_0</a>;</div>
<div class="line"><a name="l00810"></a><span class="lineno"> 810</span>  mcastaddr.addr[1] = <a class="code" href="prot_2ethernet_8h.html#ac08b2a99f6ff9cbafaa1cb5a6405d225">LL_IP4_MULTICAST_ADDR_1</a>;</div>
<div class="line"><a name="l00811"></a><span class="lineno"> 811</span>  mcastaddr.addr[2] = <a class="code" href="prot_2ethernet_8h.html#a98285b6f76c2eb6b6c738da62176bce0">LL_IP4_MULTICAST_ADDR_2</a>;</div>
<div class="line"><a name="l00812"></a><span class="lineno"> 812</span>  mcastaddr.addr[3] = ip4_addr2(ipaddr) & 0x7f;</div>
<div class="line"><a name="l00813"></a><span class="lineno"> 813</span>  mcastaddr.addr[4] = ip4_addr3(ipaddr);</div>
<div class="line"><a name="l00814"></a><span class="lineno"> 814</span>  mcastaddr.addr[5] = ip4_addr4(ipaddr);</div>
<div class="line"><a name="l00815"></a><span class="lineno"> 815</span>  <span class="comment">/* destination Ethernet address is multicast */</span></div>
<div class="line"><a name="l00816"></a><span class="lineno"> 816</span>  dest = &mcastaddr;</div>
<div class="line"><a name="l00817"></a><span class="lineno"> 817</span>  <span class="comment">/* unicast destination IP address? */</span></div>
<div class="line"><a name="l00818"></a><span class="lineno"> 818</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  <a class="code" href="group__compiler__abstraction.html#ga9cd1d7891fe315de1201e2c6e45f4f57">s8_t</a> i;</div>
<div class="line"><a name="l00820"></a><span class="lineno"> 820</span>  <span class="comment">/* outside local network? if so, this can neither be a global broadcast nor</span></div>
<div class="line"><a name="l00821"></a><span class="lineno"> 821</span> <span class="comment"> a subnet broadcast. */</span></div>
<div class="line"><a name="l00822"></a><span class="lineno"> 822</span>  <span class="keywordflow">if</span> (!ip4_addr_netcmp(ipaddr, netif_ip4_addr(<a class="code" href="structnetif.html">netif</a>), netif_ip4_netmask(<a class="code" href="structnetif.html">netif</a>)) &&</div>
<div class="line"><a name="l00823"></a><span class="lineno"> 823</span>  !ip4_addr_islinklocal(ipaddr)) {</div>
<div class="line"><a name="l00824"></a><span class="lineno"> 824</span> <span class="preprocessor">#if LWIP_AUTOIP</span></div>
<div class="line"><a name="l00825"></a><span class="lineno"> 825</span>  <span class="keyword">struct </span><a class="code" href="structip__hdr.html">ip_hdr</a> *iphdr = <a class="code" href="group__compiler__abstraction.html#gaade87973d72135b0b3afccfff4f62eb8">LWIP_ALIGNMENT_CAST</a>(<span class="keyword">struct</span> <a class="code" href="structip__hdr.html">ip_hdr</a>*, q-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>);</div>
<div class="line"><a name="l00826"></a><span class="lineno"> 826</span>  <span class="comment">/* According to RFC 3297, chapter 2.6.2 (Forwarding Rules), a packet with</span></div>
<div class="line"><a name="l00827"></a><span class="lineno"> 827</span> <span class="comment"> a link-local source address must always be "directly to its destination</span></div>
<div class="line"><a name="l00828"></a><span class="lineno"> 828</span> <span class="comment"> on the same physical link. The host MUST NOT send the packet to any</span></div>
<div class="line"><a name="l00829"></a><span class="lineno"> 829</span> <span class="comment"> router for forwarding". */</span></div>
<div class="line"><a name="l00830"></a><span class="lineno"> 830</span>  <span class="keywordflow">if</span> (!ip4_addr_islinklocal(&iphdr->src))</div>
<div class="line"><a name="l00831"></a><span class="lineno"> 831</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_AUTOIP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00832"></a><span class="lineno"> 832</span>  {</div>
<div class="line"><a name="l00833"></a><span class="lineno"> 833</span> <span class="preprocessor">#ifdef LWIP_HOOK_ETHARP_GET_GW</span></div>
<div class="line"><a name="l00834"></a><span class="lineno"> 834</span>  <span class="comment">/* For advanced routing, a single default gateway might not be enough, so get</span></div>
<div class="line"><a name="l00835"></a><span class="lineno"> 835</span> <span class="comment"> the IP address of the gateway to handle the current destination address. */</span></div>
<div class="line"><a name="l00836"></a><span class="lineno"> 836</span>  dst_addr = LWIP_HOOK_ETHARP_GET_GW(<a class="code" href="structnetif.html">netif</a>, ipaddr);</div>
<div class="line"><a name="l00837"></a><span class="lineno"> 837</span>  <span class="keywordflow">if</span> (dst_addr == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)</div>
<div class="line"><a name="l00838"></a><span class="lineno"> 838</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_HOOK_ETHARP_GET_GW */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00839"></a><span class="lineno"> 839</span>  {</div>
<div class="line"><a name="l00840"></a><span class="lineno"> 840</span>  <span class="comment">/* interface has default gateway? */</span></div>
<div class="line"><a name="l00841"></a><span class="lineno"> 841</span>  <span class="keywordflow">if</span> (!ip4_addr_isany_val(*netif_ip4_gw(<a class="code" href="structnetif.html">netif</a>))) {</div>
<div class="line"><a name="l00842"></a><span class="lineno"> 842</span>  <span class="comment">/* send to hardware address of default gateway IP address */</span></div>
<div class="line"><a name="l00843"></a><span class="lineno"> 843</span>  dst_addr = netif_ip4_gw(<a class="code" href="structnetif.html">netif</a>);</div>
<div class="line"><a name="l00844"></a><span class="lineno"> 844</span>  <span class="comment">/* no default gateway available */</span></div>
<div class="line"><a name="l00845"></a><span class="lineno"> 845</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00846"></a><span class="lineno"> 846</span>  <span class="comment">/* no route to destination error (default gateway missing) */</span></div>
<div class="line"><a name="l00847"></a><span class="lineno"> 847</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadca9448893187313c0c5a502ca9a9ad1c2a">ERR_RTE</a>;</div>
<div class="line"><a name="l00848"></a><span class="lineno"> 848</span>  }</div>
<div class="line"><a name="l00849"></a><span class="lineno"> 849</span>  }</div>
<div class="line"><a name="l00850"></a><span class="lineno"> 850</span>  }</div>
<div class="line"><a name="l00851"></a><span class="lineno"> 851</span>  }</div>
<div class="line"><a name="l00852"></a><span class="lineno"> 852</span> <span class="preprocessor">#if LWIP_NETIF_HWADDRHINT</span></div>
<div class="line"><a name="l00853"></a><span class="lineno"> 853</span>  <span class="keywordflow">if</span> (<a class="code" href="structnetif.html">netif</a>->addr_hint != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00854"></a><span class="lineno"> 854</span>  <span class="comment">/* per-pcb cached entry was given */</span></div>
<div class="line"><a name="l00855"></a><span class="lineno"> 855</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> etharp_cached_entry = *(<a class="code" href="structnetif.html">netif</a>->addr_hint);</div>
<div class="line"><a name="l00856"></a><span class="lineno"> 856</span>  <span class="keywordflow">if</span> (etharp_cached_entry < <a class="code" href="lwipopts_8h.html#a924936a814564dbdb0bc950d255a83b9">ARP_TABLE_SIZE</a>) {</div>
<div class="line"><a name="l00857"></a><span class="lineno"> 857</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_NETIF_HWADDRHINT */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00858"></a><span class="lineno"> 858</span>  <span class="keywordflow">if</span> ((arp_table[etharp_cached_entry].state >= ETHARP_STATE_STABLE) &&</div>
<div class="line"><a name="l00859"></a><span class="lineno"> 859</span> <span class="preprocessor">#if ETHARP_TABLE_MATCH_NETIF</span></div>
<div class="line"><a name="l00860"></a><span class="lineno"> 860</span>  (arp_table[etharp_cached_entry].netif == <a class="code" href="structnetif.html">netif</a>) &&</div>
<div class="line"><a name="l00861"></a><span class="lineno"> 861</span> #endif</div>
<div class="line"><a name="l00862"></a><span class="lineno"> 862</span>  (ip4_addr_cmp(dst_addr, &arp_table[etharp_cached_entry].ipaddr))) {</div>
<div class="line"><a name="l00863"></a><span class="lineno"> 863</span>  <span class="comment">/* the per-pcb-cached entry is stable and the right one! */</span></div>
<div class="line"><a name="l00864"></a><span class="lineno"> 864</span>  <a class="code" href="stats_8h.html#aea3a36c64f7159af04b7acc985402edc">ETHARP_STATS_INC</a>(etharp.cachehit);</div>
<div class="line"><a name="l00865"></a><span class="lineno"> 865</span>  <span class="keywordflow">return</span> etharp_output_to_arp_index(<a class="code" href="structnetif.html">netif</a>, q, etharp_cached_entry);</div>
<div class="line"><a name="l00866"></a><span class="lineno"> 866</span>  }</div>
<div class="line"><a name="l00867"></a><span class="lineno"> 867</span> <span class="preprocessor">#if LWIP_NETIF_HWADDRHINT</span></div>
<div class="line"><a name="l00868"></a><span class="lineno"> 868</span>  }</div>
<div class="line"><a name="l00869"></a><span class="lineno"> 869</span>  }</div>
<div class="line"><a name="l00870"></a><span class="lineno"> 870</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_NETIF_HWADDRHINT */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00871"></a><span class="lineno"> 871</span>  </div>
<div class="line"><a name="l00872"></a><span class="lineno"> 872</span>  <span class="comment">/* find stable entry: do this here since this is a critical path for</span></div>
<div class="line"><a name="l00873"></a><span class="lineno"> 873</span> <span class="comment"> throughput and etharp_find_entry() is kind of slow */</span></div>
<div class="line"><a name="l00874"></a><span class="lineno"> 874</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="l00875"></a><span class="lineno"> 875</span>  <span class="keywordflow">if</span> ((arp_table[i].state >= ETHARP_STATE_STABLE) &&</div>
<div class="line"><a name="l00876"></a><span class="lineno"> 876</span> #<span class="keywordflow">if</span> <a class="code" href="lwipopts_8h.html#a2f762eee309a545650f80fc8dcc19084">ETHARP_TABLE_MATCH_NETIF</a></div>
<div class="line"><a name="l00877"></a><span class="lineno"> 877</span>  (arp_table[i].<a class="code" href="structnetif.html">netif</a> == <a class="code" href="structnetif.html">netif</a>) &&</div>
<div class="line"><a name="l00878"></a><span class="lineno"> 878</span> #endif</div>
<div class="line"><a name="l00879"></a><span class="lineno"> 879</span>  (ip4_addr_cmp(dst_addr, &arp_table[i].ipaddr))) {</div>
<div class="line"><a name="l00880"></a><span class="lineno"> 880</span>  <span class="comment">/* found an existing, stable entry */</span></div>
<div class="line"><a name="l00881"></a><span class="lineno"> 881</span>  ETHARP_SET_HINT(<a class="code" href="structnetif.html">netif</a>, i);</div>
<div class="line"><a name="l00882"></a><span class="lineno"> 882</span>  <span class="keywordflow">return</span> etharp_output_to_arp_index(<a class="code" href="structnetif.html">netif</a>, q, i);</div>
<div class="line"><a name="l00883"></a><span class="lineno"> 883</span>  }</div>
<div class="line"><a name="l00884"></a><span class="lineno"> 884</span>  }</div>
<div class="line"><a name="l00885"></a><span class="lineno"> 885</span>  <span class="comment">/* no stable entry found, use the (slower) query function:</span></div>
<div class="line"><a name="l00886"></a><span class="lineno"> 886</span> <span class="comment"> queue on destination Ethernet address belonging to ipaddr */</span></div>
<div class="line"><a name="l00887"></a><span class="lineno"> 887</span>  <span class="keywordflow">return</span> etharp_query(<a class="code" href="structnetif.html">netif</a>, dst_addr, q);</div>
<div class="line"><a name="l00888"></a><span class="lineno"> 888</span>  }</div>
<div class="line"><a name="l00889"></a><span class="lineno"> 889</span>  </div>
<div class="line"><a name="l00890"></a><span class="lineno"> 890</span>  <span class="comment">/* continuation for multicast/broadcast destinations */</span></div>
<div class="line"><a name="l00891"></a><span class="lineno"> 891</span>  <span class="comment">/* obtain source Ethernet address of the given interface */</span></div>
<div class="line"><a name="l00892"></a><span class="lineno"> 892</span>  <span class="comment">/* send packet directly on the link */</span></div>
<div class="line"><a name="l00893"></a><span class="lineno"> 893</span>  <span class="keywordflow">return</span> ethernet_output(<a class="code" href="structnetif.html">netif</a>, q, (<span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a>*)(<a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#aee967965d999fc1a4c40a66709304e69">hwaddr</a>), dest, <a class="code" href="group__ethernet.html#gga4f8559808037803168499a3803900339ac95756b20fde70b868ef4185dd221c79">ETHTYPE_IP</a>);</div>
<div class="line"><a name="l00894"></a><span class="lineno"> 894</span> }</div>
<div class="line"><a name="l00895"></a><span class="lineno"> 895</span>  </div>
<div class="line"><a name="l00929"></a><span class="lineno"> 929</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l00930"></a><span class="lineno"> 930</span> etharp_query(<span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>, <span class="keyword">const</span> ip4_addr_t *ipaddr, <span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *q)</div>
<div class="line"><a name="l00931"></a><span class="lineno"> 931</span> {</div>
<div class="line"><a name="l00932"></a><span class="lineno"> 932</span>  <span class="keyword">struct </span><a class="code" href="structeth__addr.html">eth_addr</a> * srcaddr = (<span class="keyword">struct </span><a class="code" href="structeth__addr.html">eth_addr</a> *)<a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#aee967965d999fc1a4c40a66709304e69">hwaddr</a>;</div>
<div class="line"><a name="l00933"></a><span class="lineno"> 933</span>  <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> result = <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaaaeafdbf3aecc46864daa3cd829c7e05">ERR_MEM</a>;</div>
<div class="line"><a name="l00934"></a><span class="lineno"> 934</span>  <span class="keywordtype">int</span> is_new_entry = 0;</div>
<div class="line"><a name="l00935"></a><span class="lineno"> 935</span>  <a class="code" href="group__compiler__abstraction.html#ga9cd1d7891fe315de1201e2c6e45f4f57">s8_t</a> i; <span class="comment">/* ARP entry index */</span></div>
<div class="line"><a name="l00936"></a><span class="lineno"> 936</span>  </div>
<div class="line"><a name="l00937"></a><span class="lineno"> 937</span>  <span class="comment">/* non-unicast address? */</span></div>
<div class="line"><a name="l00938"></a><span class="lineno"> 938</span>  if (ip4_addr_isbroadcast(ipaddr, <a class="code" href="structnetif.html">netif</a>) ||</div>
<div class="line"><a name="l00939"></a><span class="lineno"> 939</span>  ip4_addr_ismulticast(ipaddr) ||</div>
<div class="line"><a name="l00940"></a><span class="lineno"> 940</span>  ip4_addr_isany(ipaddr)) {</div>
<div class="line"><a name="l00941"></a><span class="lineno"> 941</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_query: will not add non-unicast IP address to ARP cache\n"</span>));</div>
<div class="line"><a name="l00942"></a><span class="lineno"> 942</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcab508ce0ebdf3ca735208b00a80a45c91">ERR_ARG</a>;</div>
<div class="line"><a name="l00943"></a><span class="lineno"> 943</span>  }</div>
<div class="line"><a name="l00944"></a><span class="lineno"> 944</span>  </div>
<div class="line"><a name="l00945"></a><span class="lineno"> 945</span>  <span class="comment">/* find entry in ARP cache, ask to create entry if queueing packet */</span></div>
<div class="line"><a name="l00946"></a><span class="lineno"> 946</span>  i = etharp_find_entry(ipaddr, ETHARP_FLAG_TRY_HARD, <a class="code" href="structnetif.html">netif</a>);</div>
<div class="line"><a name="l00947"></a><span class="lineno"> 947</span>  </div>
<div class="line"><a name="l00948"></a><span class="lineno"> 948</span>  <span class="comment">/* could not find or create entry? */</span></div>
<div class="line"><a name="l00949"></a><span class="lineno"> 949</span>  <span class="keywordflow">if</span> (i < 0) {</div>
<div class="line"><a name="l00950"></a><span class="lineno"> 950</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_query: could not create ARP entry\n"</span>));</div>
<div class="line"><a name="l00951"></a><span class="lineno"> 951</span>  <span class="keywordflow">if</span> (q) {</div>
<div class="line"><a name="l00952"></a><span class="lineno"> 952</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_query: packet dropped\n"</span>));</div>
<div class="line"><a name="l00953"></a><span class="lineno"> 953</span>  <a class="code" href="stats_8h.html#aea3a36c64f7159af04b7acc985402edc">ETHARP_STATS_INC</a>(etharp.memerr);</div>
<div class="line"><a name="l00954"></a><span class="lineno"> 954</span>  }</div>
<div class="line"><a name="l00955"></a><span class="lineno"> 955</span>  <span class="keywordflow">return</span> (<a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a>)i;</div>
<div class="line"><a name="l00956"></a><span class="lineno"> 956</span>  }</div>
<div class="line"><a name="l00957"></a><span class="lineno"> 957</span>  </div>
<div class="line"><a name="l00958"></a><span class="lineno"> 958</span>  <span class="comment">/* mark a fresh entry as pending (we just sent a request) */</span></div>
<div class="line"><a name="l00959"></a><span class="lineno"> 959</span>  <span class="keywordflow">if</span> (arp_table[i].state == ETHARP_STATE_EMPTY) {</div>
<div class="line"><a name="l00960"></a><span class="lineno"> 960</span>  is_new_entry = 1;</div>
<div class="line"><a name="l00961"></a><span class="lineno"> 961</span>  arp_table[i].state = ETHARP_STATE_PENDING;</div>
<div class="line"><a name="l00962"></a><span class="lineno"> 962</span>  <span class="comment">/* record network interface for re-sending arp request in etharp_tmr */</span></div>
<div class="line"><a name="l00963"></a><span class="lineno"> 963</span>  arp_table[i].netif = <a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l00964"></a><span class="lineno"> 964</span>  }</div>
<div class="line"><a name="l00965"></a><span class="lineno"> 965</span>  </div>
<div class="line"><a name="l00966"></a><span class="lineno"> 966</span>  <span class="comment">/* { i is either a STABLE or (new or existing) PENDING entry } */</span></div>
<div class="line"><a name="l00967"></a><span class="lineno"> 967</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"arp_table[i].state == PENDING or STABLE"</span>,</div>
<div class="line"><a name="l00968"></a><span class="lineno"> 968</span>  ((arp_table[i].state == ETHARP_STATE_PENDING) ||</div>
<div class="line"><a name="l00969"></a><span class="lineno"> 969</span>  (arp_table[i].state >= ETHARP_STATE_STABLE)));</div>
<div class="line"><a name="l00970"></a><span class="lineno"> 970</span>  </div>
<div class="line"><a name="l00971"></a><span class="lineno"> 971</span>  <span class="comment">/* do we have a new entry? or an implicit query request? */</span></div>
<div class="line"><a name="l00972"></a><span class="lineno"> 972</span>  <span class="keywordflow">if</span> (is_new_entry || (q == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)) {</div>
<div class="line"><a name="l00973"></a><span class="lineno"> 973</span>  <span class="comment">/* try to resolve it; send out ARP request */</span></div>
<div class="line"><a name="l00974"></a><span class="lineno"> 974</span>  result = etharp_request(<a class="code" href="structnetif.html">netif</a>, ipaddr);</div>
<div class="line"><a name="l00975"></a><span class="lineno"> 975</span>  <span class="keywordflow">if</span> (result != <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>) {</div>
<div class="line"><a name="l00976"></a><span class="lineno"> 976</span>  <span class="comment">/* ARP request couldn't be sent */</span></div>
<div class="line"><a name="l00977"></a><span class="lineno"> 977</span>  <span class="comment">/* We don't re-send arp request in etharp_tmr, but we still queue packets,</span></div>
<div class="line"><a name="l00978"></a><span class="lineno"> 978</span> <span class="comment"> since this failure could be temporary, and the next packet calling</span></div>
<div class="line"><a name="l00979"></a><span class="lineno"> 979</span> <span class="comment"> etharp_query again could lead to sending the queued packets. */</span></div>
<div class="line"><a name="l00980"></a><span class="lineno"> 980</span>  }</div>
<div class="line"><a name="l00981"></a><span class="lineno"> 981</span>  <span class="keywordflow">if</span> (q == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00982"></a><span class="lineno"> 982</span>  <span class="keywordflow">return</span> result;</div>
<div class="line"><a name="l00983"></a><span class="lineno"> 983</span>  }</div>
<div class="line"><a name="l00984"></a><span class="lineno"> 984</span>  }</div>
<div class="line"><a name="l00985"></a><span class="lineno"> 985</span>  </div>
<div class="line"><a name="l00986"></a><span class="lineno"> 986</span>  <span class="comment">/* packet given? */</span></div>
<div class="line"><a name="l00987"></a><span class="lineno"> 987</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"q != NULL"</span>, q != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00988"></a><span class="lineno"> 988</span>  <span class="comment">/* stable entry? */</span></div>
<div class="line"><a name="l00989"></a><span class="lineno"> 989</span>  <span class="keywordflow">if</span> (arp_table[i].state >= ETHARP_STATE_STABLE) {</div>
<div class="line"><a name="l00990"></a><span class="lineno"> 990</span>  <span class="comment">/* we have a valid IP->Ethernet address mapping */</span></div>
<div class="line"><a name="l00991"></a><span class="lineno"> 991</span>  ETHARP_SET_HINT(<a class="code" href="structnetif.html">netif</a>, i);</div>
<div class="line"><a name="l00992"></a><span class="lineno"> 992</span>  <span class="comment">/* send the packet */</span></div>
<div class="line"><a name="l00993"></a><span class="lineno"> 993</span>  result = ethernet_output(<a class="code" href="structnetif.html">netif</a>, q, srcaddr, &(arp_table[i].ethaddr), <a class="code" href="group__ethernet.html#gga4f8559808037803168499a3803900339ac95756b20fde70b868ef4185dd221c79">ETHTYPE_IP</a>);</div>
<div class="line"><a name="l00994"></a><span class="lineno"> 994</span>  <span class="comment">/* pending entry? (either just created or already pending */</span></div>
<div class="line"><a name="l00995"></a><span class="lineno"> 995</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (arp_table[i].state == ETHARP_STATE_PENDING) {</div>
<div class="line"><a name="l00996"></a><span class="lineno"> 996</span>  <span class="comment">/* entry is still pending, queue the given packet 'q' */</span></div>
<div class="line"><a name="l00997"></a><span class="lineno"> 997</span>  <span class="keyword">struct </span><a class="code" href="structpbuf.html">pbuf</a> *p;</div>
<div class="line"><a name="l00998"></a><span class="lineno"> 998</span>  <span class="keywordtype">int</span> copy_needed = 0;</div>
<div class="line"><a name="l00999"></a><span class="lineno"> 999</span>  <span class="comment">/* IF q includes a PBUF_REF, PBUF_POOL or PBUF_RAM, we have no choice but</span></div>
<div class="line"><a name="l01000"></a><span class="lineno"> 1000</span> <span class="comment"> * to copy the whole queue into a new PBUF_RAM (see bug #11400)</span></div>
<div class="line"><a name="l01001"></a><span class="lineno"> 1001</span> <span class="comment"> * PBUF_ROMs can be left as they are, since ROM must not get changed. */</span></div>
<div class="line"><a name="l01002"></a><span class="lineno"> 1002</span>  p = q;</div>
<div class="line"><a name="l01003"></a><span class="lineno"> 1003</span>  <span class="keywordflow">while</span> (p) {</div>
<div class="line"><a name="l01004"></a><span class="lineno"> 1004</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"no packet queues allowed!"</span>, (p-><a class="code" href="structpbuf.html#a6f82449625e36e294f5d210268c0703f">len</a> != p-><a class="code" href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a>) || (p-><a class="code" href="structpbuf.html#a5e5763c94fd18d78937b0b58ce7df341">next</a> == 0));</div>
<div class="line"><a name="l01005"></a><span class="lineno"> 1005</span>  <span class="keywordflow">if</span> (p-><a class="code" href="structpbuf.html#afd7bff5210a022424caa97d2f25fe8e6">type</a> != <a class="code" href="group__pbuf.html#ggab7e0e32fcc292c0d7107721766ed92fbac120b0fe39efe35bb682e4aa3b82e2c9">PBUF_ROM</a>) {</div>
<div class="line"><a name="l01006"></a><span class="lineno"> 1006</span>  copy_needed = 1;</div>
<div class="line"><a name="l01007"></a><span class="lineno"> 1007</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l01008"></a><span class="lineno"> 1008</span>  }</div>
<div class="line"><a name="l01009"></a><span class="lineno"> 1009</span>  p = p-><a class="code" href="structpbuf.html#a5e5763c94fd18d78937b0b58ce7df341">next</a>;</div>
<div class="line"><a name="l01010"></a><span class="lineno"> 1010</span>  }</div>
<div class="line"><a name="l01011"></a><span class="lineno"> 1011</span>  <span class="keywordflow">if</span> (copy_needed) {</div>
<div class="line"><a name="l01012"></a><span class="lineno"> 1012</span>  <span class="comment">/* copy the whole packet into new pbufs */</span></div>
<div class="line"><a name="l01013"></a><span class="lineno"> 1013</span>  p = <a class="code" href="group__pbuf.html#gacfcb0a2af918658ba0afe36499c65f47">pbuf_alloc</a>(<a class="code" href="group__pbuf.html#ggaee1baa59bb2f85ba575b5a8619ac1ebfab4de441e737330558b609a990cd17346">PBUF_LINK</a>, p-><a class="code" href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a>, <a class="code" href="group__pbuf.html#ggab7e0e32fcc292c0d7107721766ed92fbac5e9f28455bca98944a030d4b84ecfab">PBUF_RAM</a>);</div>
<div class="line"><a name="l01014"></a><span class="lineno"> 1014</span>  <span class="keywordflow">if</span> (p != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l01015"></a><span class="lineno"> 1015</span>  <span class="keywordflow">if</span> (<a class="code" href="group__pbuf.html#gaba88511dee3df4b631fde691f421320d">pbuf_copy</a>(p, q) != <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>) {</div>
<div class="line"><a name="l01016"></a><span class="lineno"> 1016</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l01017"></a><span class="lineno"> 1017</span>  p = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l01018"></a><span class="lineno"> 1018</span>  }</div>
<div class="line"><a name="l01019"></a><span class="lineno"> 1019</span>  }</div>
<div class="line"><a name="l01020"></a><span class="lineno"> 1020</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01021"></a><span class="lineno"> 1021</span>  <span class="comment">/* referencing the old pbuf is enough */</span></div>
<div class="line"><a name="l01022"></a><span class="lineno"> 1022</span>  p = q;</div>
<div class="line"><a name="l01023"></a><span class="lineno"> 1023</span>  <a class="code" href="group__pbuf.html#ga77f6bbd69e45e542014d9c547c7da74e">pbuf_ref</a>(p);</div>
<div class="line"><a name="l01024"></a><span class="lineno"> 1024</span>  }</div>
<div class="line"><a name="l01025"></a><span class="lineno"> 1025</span>  <span class="comment">/* packet could be taken over? */</span></div>
<div class="line"><a name="l01026"></a><span class="lineno"> 1026</span>  <span class="keywordflow">if</span> (p != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l01027"></a><span class="lineno"> 1027</span>  <span class="comment">/* queue packet ... */</span></div>
<div class="line"><a name="l01028"></a><span class="lineno"> 1028</span> <span class="preprocessor">#if ARP_QUEUEING</span></div>
<div class="line"><a name="l01029"></a><span class="lineno"> 1029</span>  <span class="keyword">struct </span>etharp_q_entry *new_entry;</div>
<div class="line"><a name="l01030"></a><span class="lineno"> 1030</span>  <span class="comment">/* allocate a new arp queue entry */</span></div>
<div class="line"><a name="l01031"></a><span class="lineno"> 1031</span>  new_entry = (<span class="keyword">struct </span>etharp_q_entry *)<a class="code" href="memp_8h.html#a2b00593d086313c267b54a976bf67aa5">memp_malloc</a>(MEMP_ARP_QUEUE);</div>
<div class="line"><a name="l01032"></a><span class="lineno"> 1032</span>  <span class="keywordflow">if</span> (new_entry != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l01033"></a><span class="lineno"> 1033</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> qlen = 0;</div>
<div class="line"><a name="l01034"></a><span class="lineno"> 1034</span>  new_entry->next = 0;</div>
<div class="line"><a name="l01035"></a><span class="lineno"> 1035</span>  new_entry->p = p;</div>
<div class="line"><a name="l01036"></a><span class="lineno"> 1036</span>  <span class="keywordflow">if</span> (arp_table[i].q != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l01037"></a><span class="lineno"> 1037</span>  <span class="comment">/* queue was already existent, append the new entry to the end */</span></div>
<div class="line"><a name="l01038"></a><span class="lineno"> 1038</span>  <span class="keyword">struct </span>etharp_q_entry *r;</div>
<div class="line"><a name="l01039"></a><span class="lineno"> 1039</span>  r = arp_table[i].q;</div>
<div class="line"><a name="l01040"></a><span class="lineno"> 1040</span>  qlen++;</div>
<div class="line"><a name="l01041"></a><span class="lineno"> 1041</span>  <span class="keywordflow">while</span> (r->next != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l01042"></a><span class="lineno"> 1042</span>  r = r-><a class="code" href="structpbuf.html#a5e5763c94fd18d78937b0b58ce7df341">next</a>;</div>
<div class="line"><a name="l01043"></a><span class="lineno"> 1043</span>  qlen++;</div>
<div class="line"><a name="l01044"></a><span class="lineno"> 1044</span>  }</div>
<div class="line"><a name="l01045"></a><span class="lineno"> 1045</span>  r-><a class="code" href="structpbuf.html#a5e5763c94fd18d78937b0b58ce7df341">next</a> = new_entry;</div>
<div class="line"><a name="l01046"></a><span class="lineno"> 1046</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01047"></a><span class="lineno"> 1047</span>  <span class="comment">/* queue did not exist, first item in queue */</span></div>
<div class="line"><a name="l01048"></a><span class="lineno"> 1048</span>  arp_table[i].q = new_entry;</div>
<div class="line"><a name="l01049"></a><span class="lineno"> 1049</span>  }</div>
<div class="line"><a name="l01050"></a><span class="lineno"> 1050</span> <span class="preprocessor">#if ARP_QUEUE_LEN</span></div>
<div class="line"><a name="l01051"></a><span class="lineno"> 1051</span>  <span class="keywordflow">if</span> (qlen >= <a class="code" href="lwipopts_8h.html#a29f41a6ebdbb23f46688d381b3609fd1">ARP_QUEUE_LEN</a>) {</div>
<div class="line"><a name="l01052"></a><span class="lineno"> 1052</span>  <span class="keyword">struct </span>etharp_q_entry *old;</div>
<div class="line"><a name="l01053"></a><span class="lineno"> 1053</span>  old = arp_table[i].q;</div>
<div class="line"><a name="l01054"></a><span class="lineno"> 1054</span>  arp_table[i].q = arp_table[i].q-><a class="code" href="structpbuf.html#a5e5763c94fd18d78937b0b58ce7df341">next</a>;</div>
<div class="line"><a name="l01055"></a><span class="lineno"> 1055</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(old->p);</div>
<div class="line"><a name="l01056"></a><span class="lineno"> 1056</span>  <a class="code" href="memp_8h.html#aecd94926b7c2a0e23ae195f4ae97581f">memp_free</a>(MEMP_ARP_QUEUE, old);</div>
<div class="line"><a name="l01057"></a><span class="lineno"> 1057</span>  }</div>
<div class="line"><a name="l01058"></a><span class="lineno"> 1058</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l01059"></a><span class="lineno"> 1059</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_query: queued packet %p on ARP entry %"</span><a class="code" href="group__compiler__abstraction.html#gac05a82d37afb251470f5e17ca15ab6e9">S16_F</a><span class="stringliteral">"\n"</span>, (<span class="keywordtype">void</span> *)q, (<a class="code" href="group__compiler__abstraction.html#gacf46f4df0ebab84edebcb69967fdf86b">s16_t</a>)i));</div>
<div class="line"><a name="l01060"></a><span class="lineno"> 1060</span>  result = <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</div>
<div class="line"><a name="l01061"></a><span class="lineno"> 1061</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01062"></a><span class="lineno"> 1062</span>  <span class="comment">/* the pool MEMP_ARP_QUEUE is empty */</span></div>
<div class="line"><a name="l01063"></a><span class="lineno"> 1063</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l01064"></a><span class="lineno"> 1064</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_query: could not queue a copy of PBUF_REF packet %p (out of memory)\n"</span>, (<span class="keywordtype">void</span> *)q));</div>
<div class="line"><a name="l01065"></a><span class="lineno"> 1065</span>  result = <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaaaeafdbf3aecc46864daa3cd829c7e05">ERR_MEM</a>;</div>
<div class="line"><a name="l01066"></a><span class="lineno"> 1066</span>  }</div>
<div class="line"><a name="l01067"></a><span class="lineno"> 1067</span> <span class="preprocessor">#else </span><span class="comment">/* ARP_QUEUEING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l01068"></a><span class="lineno"> 1068</span>  <span class="comment">/* always queue one packet per ARP request only, freeing a previously queued packet */</span></div>
<div class="line"><a name="l01069"></a><span class="lineno"> 1069</span>  <span class="keywordflow">if</span> (arp_table[i].q != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l01070"></a><span class="lineno"> 1070</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_query: dropped previously queued packet %p for ARP entry %"</span><a class="code" href="group__compiler__abstraction.html#gac05a82d37afb251470f5e17ca15ab6e9">S16_F</a><span class="stringliteral">"\n"</span>, (<span class="keywordtype">void</span> *)q, (<a class="code" href="group__compiler__abstraction.html#gacf46f4df0ebab84edebcb69967fdf86b">s16_t</a>)i));</div>
<div class="line"><a name="l01071"></a><span class="lineno"> 1071</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(arp_table[i].q);</div>
<div class="line"><a name="l01072"></a><span class="lineno"> 1072</span>  }</div>
<div class="line"><a name="l01073"></a><span class="lineno"> 1073</span>  arp_table[i].q = p;</div>
<div class="line"><a name="l01074"></a><span class="lineno"> 1074</span>  result = <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</div>
<div class="line"><a name="l01075"></a><span class="lineno"> 1075</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_query: queued packet %p on ARP entry %"</span><a class="code" href="group__compiler__abstraction.html#gac05a82d37afb251470f5e17ca15ab6e9">S16_F</a><span class="stringliteral">"\n"</span>, (<span class="keywordtype">void</span> *)q, (<a class="code" href="group__compiler__abstraction.html#gacf46f4df0ebab84edebcb69967fdf86b">s16_t</a>)i));</div>
<div class="line"><a name="l01076"></a><span class="lineno"> 1076</span> <span class="preprocessor">#endif </span><span class="comment">/* ARP_QUEUEING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l01077"></a><span class="lineno"> 1077</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l01078"></a><span class="lineno"> 1078</span>  <a class="code" href="stats_8h.html#aea3a36c64f7159af04b7acc985402edc">ETHARP_STATS_INC</a>(etharp.memerr);</div>
<div class="line"><a name="l01079"></a><span class="lineno"> 1079</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_query: could not queue a copy of PBUF_REF packet %p (out of memory)\n"</span>, (<span class="keywordtype">void</span> *)q));</div>
<div class="line"><a name="l01080"></a><span class="lineno"> 1080</span>  result = <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaaaeafdbf3aecc46864daa3cd829c7e05">ERR_MEM</a>;</div>
<div class="line"><a name="l01081"></a><span class="lineno"> 1081</span>  }</div>
<div class="line"><a name="l01082"></a><span class="lineno"> 1082</span>  }</div>
<div class="line"><a name="l01083"></a><span class="lineno"> 1083</span>  <span class="keywordflow">return</span> result;</div>
<div class="line"><a name="l01084"></a><span class="lineno"> 1084</span> }</div>
<div class="line"><a name="l01085"></a><span class="lineno"> 1085</span>  </div>
<div class="line"><a name="l01101"></a><span class="lineno"> 1101</span> <span class="keyword">static</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l01102"></a><span class="lineno"> 1102</span> etharp_raw(<span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>, <span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *ethsrc_addr,</div>
<div class="line"><a name="l01103"></a><span class="lineno"> 1103</span>  <span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *ethdst_addr,</div>
<div class="line"><a name="l01104"></a><span class="lineno"> 1104</span>  <span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *hwsrc_addr, <span class="keyword">const</span> ip4_addr_t *ipsrc_addr,</div>
<div class="line"><a name="l01105"></a><span class="lineno"> 1105</span>  <span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *hwdst_addr, <span class="keyword">const</span> ip4_addr_t *ipdst_addr,</div>
<div class="line"><a name="l01106"></a><span class="lineno"> 1106</span>  <span class="keyword">const</span> <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> opcode)</div>
<div class="line"><a name="l01107"></a><span class="lineno"> 1107</span> {</div>
<div class="line"><a name="l01108"></a><span class="lineno"> 1108</span>  <span class="keyword">struct </span><a class="code" href="structpbuf.html">pbuf</a> *p;</div>
<div class="line"><a name="l01109"></a><span class="lineno"> 1109</span>  <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> result = <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</div>
<div class="line"><a name="l01110"></a><span class="lineno"> 1110</span>  <span class="keyword">struct </span><a class="code" href="structetharp__hdr.html">etharp_hdr</a> *hdr;</div>
<div class="line"><a name="l01111"></a><span class="lineno"> 1111</span>  </div>
<div class="line"><a name="l01112"></a><span class="lineno"> 1112</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"netif != NULL"</span>, <a class="code" href="structnetif.html">netif</a> != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l01113"></a><span class="lineno"> 1113</span>  </div>
<div class="line"><a name="l01114"></a><span class="lineno"> 1114</span>  <span class="comment">/* allocate a pbuf for the outgoing ARP request packet */</span></div>
<div class="line"><a name="l01115"></a><span class="lineno"> 1115</span>  p = <a class="code" href="group__pbuf.html#gacfcb0a2af918658ba0afe36499c65f47">pbuf_alloc</a>(<a class="code" href="group__pbuf.html#ggaee1baa59bb2f85ba575b5a8619ac1ebfab4de441e737330558b609a990cd17346">PBUF_LINK</a>, <a class="code" href="prot_2etharp_8h.html#a58f300020d1e3a91cad207410a2a82ab">SIZEOF_ETHARP_HDR</a>, <a class="code" href="group__pbuf.html#ggab7e0e32fcc292c0d7107721766ed92fbac5e9f28455bca98944a030d4b84ecfab">PBUF_RAM</a>);</div>
<div class="line"><a name="l01116"></a><span class="lineno"> 1116</span>  <span class="comment">/* could allocate a pbuf for an ARP request? */</span></div>
<div class="line"><a name="l01117"></a><span class="lineno"> 1117</span>  <span class="keywordflow">if</span> (p == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l01118"></a><span class="lineno"> 1118</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a> | <a class="code" href="group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a>,</div>
<div class="line"><a name="l01119"></a><span class="lineno"> 1119</span>  (<span class="stringliteral">"etharp_raw: could not allocate pbuf for ARP request.\n"</span>));</div>
<div class="line"><a name="l01120"></a><span class="lineno"> 1120</span>  <a class="code" href="stats_8h.html#aea3a36c64f7159af04b7acc985402edc">ETHARP_STATS_INC</a>(etharp.memerr);</div>
<div class="line"><a name="l01121"></a><span class="lineno"> 1121</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaaaeafdbf3aecc46864daa3cd829c7e05">ERR_MEM</a>;</div>
<div class="line"><a name="l01122"></a><span class="lineno"> 1122</span>  }</div>
<div class="line"><a name="l01123"></a><span class="lineno"> 1123</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"check that first pbuf can hold struct etharp_hdr"</span>,</div>
<div class="line"><a name="l01124"></a><span class="lineno"> 1124</span>  (p-><a class="code" href="structpbuf.html#a6f82449625e36e294f5d210268c0703f">len</a> >= <a class="code" href="prot_2etharp_8h.html#a58f300020d1e3a91cad207410a2a82ab">SIZEOF_ETHARP_HDR</a>));</div>
<div class="line"><a name="l01125"></a><span class="lineno"> 1125</span>  </div>
<div class="line"><a name="l01126"></a><span class="lineno"> 1126</span>  hdr = (<span class="keyword">struct </span><a class="code" href="structetharp__hdr.html">etharp_hdr</a> *)p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l01127"></a><span class="lineno"> 1127</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_raw: sending raw ARP packet.\n"</span>));</div>
<div class="line"><a name="l01128"></a><span class="lineno"> 1128</span>  hdr->opcode = <a class="code" href="def_8c.html#ad637280639de4066392e6b5614fa3e56">lwip_htons</a>(opcode);</div>
<div class="line"><a name="l01129"></a><span class="lineno"> 1129</span>  </div>
<div class="line"><a name="l01130"></a><span class="lineno"> 1130</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"netif->hwaddr_len must be the same as ETH_HWADDR_LEN for etharp!"</span>,</div>
<div class="line"><a name="l01131"></a><span class="lineno"> 1131</span>  (<a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#afe1181561cb16241f3cb5ed01e567d42">hwaddr_len</a> == <a class="code" href="prot_2ethernet_8h.html#ac9426049770b40fcd9556ffbd7e56907">ETH_HWADDR_LEN</a>));</div>
<div class="line"><a name="l01132"></a><span class="lineno"> 1132</span>  </div>
<div class="line"><a name="l01133"></a><span class="lineno"> 1133</span>  <span class="comment">/* Write the ARP MAC-Addresses */</span></div>
<div class="line"><a name="l01134"></a><span class="lineno"> 1134</span>  <a class="code" href="prot_2ethernet_8h.html#a10cbd9cd91e7e0ebed3a1159e385c037">ETHADDR16_COPY</a>(&hdr->shwaddr, hwsrc_addr);</div>
<div class="line"><a name="l01135"></a><span class="lineno"> 1135</span>  <a class="code" href="prot_2ethernet_8h.html#a10cbd9cd91e7e0ebed3a1159e385c037">ETHADDR16_COPY</a>(&hdr->dhwaddr, hwdst_addr);</div>
<div class="line"><a name="l01136"></a><span class="lineno"> 1136</span>  <span class="comment">/* Copy struct ip4_addr2 to aligned ip4_addr, to support compilers without</span></div>
<div class="line"><a name="l01137"></a><span class="lineno"> 1137</span> <span class="comment"> * structure packing. */</span></div>
<div class="line"><a name="l01138"></a><span class="lineno"> 1138</span>  IPADDR2_COPY(&hdr->sipaddr, ipsrc_addr);</div>
<div class="line"><a name="l01139"></a><span class="lineno"> 1139</span>  IPADDR2_COPY(&hdr->dipaddr, ipdst_addr);</div>
<div class="line"><a name="l01140"></a><span class="lineno"> 1140</span>  </div>
<div class="line"><a name="l01141"></a><span class="lineno"> 1141</span>  hdr->hwtype = <a class="code" href="def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a>(<a class="code" href="prot_2etharp_8h.html#a2bfef84e6dba235e7019834a4b493a66a6e4adc4f5f733878a0173c6fb98a5f93">HWTYPE_ETHERNET</a>);</div>
<div class="line"><a name="l01142"></a><span class="lineno"> 1142</span>  hdr->proto = <a class="code" href="def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a>(<a class="code" href="group__ethernet.html#gga4f8559808037803168499a3803900339ac95756b20fde70b868ef4185dd221c79">ETHTYPE_IP</a>);</div>
<div class="line"><a name="l01143"></a><span class="lineno"> 1143</span>  <span class="comment">/* set hwlen and protolen */</span></div>
<div class="line"><a name="l01144"></a><span class="lineno"> 1144</span>  hdr->hwlen = <a class="code" href="prot_2ethernet_8h.html#ac9426049770b40fcd9556ffbd7e56907">ETH_HWADDR_LEN</a>;</div>
<div class="line"><a name="l01145"></a><span class="lineno"> 1145</span>  hdr->protolen = <span class="keyword">sizeof</span>(ip4_addr_t);</div>
<div class="line"><a name="l01146"></a><span class="lineno"> 1146</span>  </div>
<div class="line"><a name="l01147"></a><span class="lineno"> 1147</span>  <span class="comment">/* send ARP query */</span></div>
<div class="line"><a name="l01148"></a><span class="lineno"> 1148</span> <span class="preprocessor">#if LWIP_AUTOIP</span></div>
<div class="line"><a name="l01149"></a><span class="lineno"> 1149</span>  <span class="comment">/* If we are using Link-Local, all ARP packets that contain a Link-Local</span></div>
<div class="line"><a name="l01150"></a><span class="lineno"> 1150</span> <span class="comment"> * 'sender IP address' MUST be sent using link-layer broadcast instead of</span></div>
<div class="line"><a name="l01151"></a><span class="lineno"> 1151</span> <span class="comment"> * link-layer unicast. (See RFC3927 Section 2.5, last paragraph) */</span></div>
<div class="line"><a name="l01152"></a><span class="lineno"> 1152</span>  <span class="keywordflow">if</span>(ip4_addr_islinklocal(ipsrc_addr)) {</div>
<div class="line"><a name="l01153"></a><span class="lineno"> 1153</span>  ethernet_output(<a class="code" href="structnetif.html">netif</a>, p, ethsrc_addr, &ethbroadcast, <a class="code" href="group__ethernet.html#gga4f8559808037803168499a3803900339a41217db03576ea59c44b28b248c39be5">ETHTYPE_ARP</a>);</div>
<div class="line"><a name="l01154"></a><span class="lineno"> 1154</span>  } <span class="keywordflow">else</span></div>
<div class="line"><a name="l01155"></a><span class="lineno"> 1155</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_AUTOIP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l01156"></a><span class="lineno"> 1156</span>  {</div>
<div class="line"><a name="l01157"></a><span class="lineno"> 1157</span>  ethernet_output(<a class="code" href="structnetif.html">netif</a>, p, ethsrc_addr, ethdst_addr, <a class="code" href="group__ethernet.html#gga4f8559808037803168499a3803900339a41217db03576ea59c44b28b248c39be5">ETHTYPE_ARP</a>);</div>
<div class="line"><a name="l01158"></a><span class="lineno"> 1158</span>  }</div>
<div class="line"><a name="l01159"></a><span class="lineno"> 1159</span>  </div>
<div class="line"><a name="l01160"></a><span class="lineno"> 1160</span>  <a class="code" href="stats_8h.html#aea3a36c64f7159af04b7acc985402edc">ETHARP_STATS_INC</a>(etharp.xmit);</div>
<div class="line"><a name="l01161"></a><span class="lineno"> 1161</span>  <span class="comment">/* free ARP query packet */</span></div>
<div class="line"><a name="l01162"></a><span class="lineno"> 1162</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l01163"></a><span class="lineno"> 1163</span>  p = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l01164"></a><span class="lineno"> 1164</span>  <span class="comment">/* could not allocate pbuf for ARP request */</span></div>
<div class="line"><a name="l01165"></a><span class="lineno"> 1165</span>  </div>
<div class="line"><a name="l01166"></a><span class="lineno"> 1166</span>  <span class="keywordflow">return</span> result;</div>
<div class="line"><a name="l01167"></a><span class="lineno"> 1167</span> }</div>
<div class="line"><a name="l01168"></a><span class="lineno"> 1168</span>  </div>
<div class="line"><a name="l01181"></a><span class="lineno"> 1181</span> <span class="keyword">static</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l01182"></a><span class="lineno"> 1182</span> etharp_request_dst(<span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>, <span class="keyword">const</span> ip4_addr_t *ipaddr, <span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a>* hw_dst_addr)</div>
<div class="line"><a name="l01183"></a><span class="lineno"> 1183</span> {</div>
<div class="line"><a name="l01184"></a><span class="lineno"> 1184</span>  <span class="keywordflow">return</span> etharp_raw(<a class="code" href="structnetif.html">netif</a>, (<span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *)<a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#aee967965d999fc1a4c40a66709304e69">hwaddr</a>, hw_dst_addr,</div>
<div class="line"><a name="l01185"></a><span class="lineno"> 1185</span>  (<span class="keyword">struct</span> <a class="code" href="structeth__addr.html">eth_addr</a> *)<a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#aee967965d999fc1a4c40a66709304e69">hwaddr</a>, netif_ip4_addr(<a class="code" href="structnetif.html">netif</a>), &ethzero,</div>
<div class="line"><a name="l01186"></a><span class="lineno"> 1186</span>  ipaddr, <a class="code" href="prot_2etharp_8h.html#af8a1068cba34f11d56afb73cdd879cabafb58ccf8b7b11505ff2117a10bf6ff61">ARP_REQUEST</a>);</div>
<div class="line"><a name="l01187"></a><span class="lineno"> 1187</span> }</div>
<div class="line"><a name="l01188"></a><span class="lineno"> 1188</span>  </div>
<div class="line"><a name="l01198"></a><span class="lineno"> 1198</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l01199"></a><span class="lineno"> 1199</span> etharp_request(<span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>, <span class="keyword">const</span> ip4_addr_t *ipaddr)</div>
<div class="line"><a name="l01200"></a><span class="lineno"> 1200</span> {</div>
<div class="line"><a name="l01201"></a><span class="lineno"> 1201</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"etharp_request: sending ARP request.\n"</span>));</div>
<div class="line"><a name="l01202"></a><span class="lineno"> 1202</span>  <span class="keywordflow">return</span> etharp_request_dst(<a class="code" href="structnetif.html">netif</a>, ipaddr, &ethbroadcast);</div>
<div class="line"><a name="l01203"></a><span class="lineno"> 1203</span> }</div>
<div class="line"><a name="l01204"></a><span class="lineno"> 1204</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_IPV4 && LWIP_ARP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l01205"></a><span class="lineno"> 1205</span>  </div>
<div class="line"><a name="l01206"></a><span class="lineno"> 1206</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_ARP || LWIP_ETHERNET */</span><span class="preprocessor"></span></div>
</div><!-- fragment --></div><!-- contents -->
</div><!-- doc-content -->
<div class="ttc" id="alwipopts_8h_html_a741a0710dc126ed3ae9e305472df3432"><div class="ttname"><a href="lwipopts_8h.html#a741a0710dc126ed3ae9e305472df3432">ARP_MAXAGE</a></div><div class="ttdeci">#define ARP_MAXAGE</div><div class="ttdef"><b>Definition:</b> <a href="lwipopts_8h_source.html#l00093">lwipopts.h:93</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_gac05a82d37afb251470f5e17ca15ab6e9"><div class="ttname"><a href="group__compiler__abstraction.html#gac05a82d37afb251470f5e17ca15ab6e9">S16_F</a></div><div class="ttdeci">#define S16_F</div><div class="ttdef"><b>Definition:</b> <a href="arch_8h_source.html#l00151">arch.h:151</a></div></div>
<div class="ttc" id="aopt_8h_html"><div class="ttname"><a href="opt_8h.html">opt.h</a></div></div>
<div class="ttc" id="astructpbuf_html_a6f82449625e36e294f5d210268c0703f"><div class="ttname"><a href="structpbuf.html#a6f82449625e36e294f5d210268c0703f">pbuf::len</a></div><div class="ttdeci">u16_t len</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00159">pbuf.h:159</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="agroup__compiler__abstraction_html_gacf46f4df0ebab84edebcb69967fdf86b"><div class="ttname"><a href="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="arch_8h_source.html#l00125">arch.h:125</a></div></div>
<div class="ttc" id="adebug_8h_html_a94ad086267808462beae2b38f91996ed"><div class="ttname"><a href="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="debug_8h_source.html#l00116">debug.h:116</a></div></div>
<div class="ttc" id="agroup__pbuf_html_ggab7e0e32fcc292c0d7107721766ed92fbac120b0fe39efe35bb682e4aa3b82e2c9"><div class="ttname"><a href="group__pbuf.html#ggab7e0e32fcc292c0d7107721766ed92fbac120b0fe39efe35bb682e4aa3b82e2c9">PBUF_ROM</a></div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00112">pbuf.h:112</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_gaade87973d72135b0b3afccfff4f62eb8"><div class="ttname"><a href="group__compiler__abstraction.html#gaade87973d72135b0b3afccfff4f62eb8">LWIP_ALIGNMENT_CAST</a></div><div class="ttdeci">#define LWIP_ALIGNMENT_CAST(target_type, val)</div><div class="ttdef"><b>Definition:</b> <a href="arch_8h_source.html#l00192">arch.h:192</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_ga77570ac4fcab86864fa1916e55676da2"><div class="ttname"><a href="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="arch_8h_source.html#l00124">arch.h:124</a></div></div>
<div class="ttc" id="astring_8h_html"><div class="ttname"><a href="string_8h.html">string.h</a></div></div>
<div class="ttc" id="astructetharp__hdr_html"><div class="ttname"><a href="structetharp__hdr.html">etharp_hdr</a></div><div class="ttdef"><b>Definition:</b> <a href="prot_2etharp_8h_source.html#l00057">etharp.h:57</a></div></div>
<div class="ttc" id="aautoip_8h_html"><div class="ttname"><a href="autoip_8h.html">autoip.h</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="astats_8h_html_aea3a36c64f7159af04b7acc985402edc"><div class="ttname"><a href="stats_8h.html#aea3a36c64f7159af04b7acc985402edc">ETHARP_STATS_INC</a></div><div class="ttdeci">#define ETHARP_STATS_INC(x)</div><div class="ttdef"><b>Definition:</b> <a href="stats_8h_source.html#l00376">stats.h:376</a></div></div>
<div class="ttc" id="alwipopts_8h_html_a4675829464156f3d665f4de171c212d7"><div class="ttname"><a href="lwipopts_8h.html#a4675829464156f3d665f4de171c212d7">ETHARP_SUPPORT_STATIC_ENTRIES</a></div><div class="ttdeci">#define ETHARP_SUPPORT_STATIC_ENTRIES</div><div class="ttdef"><b>Definition:</b> <a href="lwipopts_8h_source.html#l00105">lwipopts.h:105</a></div></div>
<div class="ttc" id="astructnetif_html_a809cc57c0dff09c5c9ae45b02c2002f3"><div class="ttname"><a href="structnetif.html#a809cc57c0dff09c5c9ae45b02c2002f3">netif::state</a></div><div class="ttdeci">void * state</div><div class="ttdef"><b>Definition:</b> <a href="netif_8h_source.html#l00287">netif.h:287</a></div></div>
<div class="ttc" id="astructpbuf_html_a5e5763c94fd18d78937b0b58ce7df341"><div class="ttname"><a href="structpbuf.html#a5e5763c94fd18d78937b0b58ce7df341">pbuf::next</a></div><div class="ttdeci">struct pbuf * next</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00144">pbuf.h:144</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="alwipopts_8h_html_a2f762eee309a545650f80fc8dcc19084"><div class="ttname"><a href="lwipopts_8h.html#a2f762eee309a545650f80fc8dcc19084">ETHARP_TABLE_MATCH_NETIF</a></div><div class="ttdeci">#define ETHARP_TABLE_MATCH_NETIF</div><div class="ttdef"><b>Definition:</b> <a href="lwipopts_8h_source.html#l00107">lwipopts.h:107</a></div></div>
<div class="ttc" id="amemp_8h_html_a2b00593d086313c267b54a976bf67aa5"><div class="ttname"><a href="memp_8h.html#a2b00593d086313c267b54a976bf67aa5">memp_malloc</a></div><div class="ttdeci">void * memp_malloc(memp_t type)</div><div class="ttdef"><b>Definition:</b> <a href="memp_8c_source.html#l00385">memp.c:385</a></div></div>
<div class="ttc" id="agroup__debugging__levels_html_ga988147559b78642ac881815b66023646"><div class="ttname"><a href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a></div><div class="ttdeci">#define LWIP_DBG_TRACE</div><div class="ttdef"><b>Definition:</b> <a href="debug_8h_source.html#l00083">debug.h:83</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_ga1418f92673e54a36b6e376109e526382"><div class="ttname"><a href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a></div><div class="ttdeci">#define X16_F</div><div class="ttdef"><b>Definition:</b> <a href="arch_8h_source.html#l00154">arch.h:154</a></div></div>
<div class="ttc" id="amemp_8h_html_aecd94926b7c2a0e23ae195f4ae97581f"><div class="ttname"><a href="memp_8h.html#aecd94926b7c2a0e23ae195f4ae97581f">memp_free</a></div><div class="ttdeci">void memp_free(memp_t type, void *mem)</div><div class="ttdef"><b>Definition:</b> <a href="memp_8c_source.html#l00469">memp.c:469</a></div></div>
<div class="ttc" id="asnmp_8h_html_a8f86f7f089ed2ecf4ed14aa01db3b173"><div class="ttname"><a href="snmp_8h.html#a8f86f7f089ed2ecf4ed14aa01db3b173">mib2_remove_arp_entry</a></div><div class="ttdeci">#define mib2_remove_arp_entry(ni, ip)</div><div class="ttdef"><b>Definition:</b> <a href="snmp_8h_source.html#l00182">snmp.h:182</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="alwipopts_8h_html_abff5d1e0b334f5b45bd2b8bbb675411e"><div class="ttname"><a href="lwipopts_8h.html#abff5d1e0b334f5b45bd2b8bbb675411e">ETHARP_DEBUG</a></div><div class="ttdeci">#define ETHARP_DEBUG</div><div class="ttdef"><b>Definition:</b> <a href="lwipopts_8h_source.html#l00431">lwipopts.h:431</a></div></div>
<div class="ttc" id="asnmp_8h_html"><div class="ttname"><a href="snmp_8h.html">snmp.h</a></div></div>
<div class="ttc" id="astats_8h_html"><div class="ttname"><a href="stats_8h.html">stats.h</a></div></div>
<div class="ttc" id="agroup__infrastructure__errors_html_ggae2e66c7d13afc90ffecd6151680fbadcaaaeafdbf3aecc46864daa3cd829c7e05"><div class="ttname"><a href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaaaeafdbf3aecc46864daa3cd829c7e05">ERR_MEM</a></div><div class="ttdef"><b>Definition:</b> <a href="err_8h_source.html#l00065">err.h:65</a></div></div>
<div class="ttc" id="agroup__debugging__levels_html_ga0269bdc51f1e8a5ecf9af72c6e1c996c"><div class="ttname"><a href="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="debug_8h_source.html#l00057">debug.h:57</a></div></div>
<div class="ttc" id="aprot_2etharp_8h_html_af8a1068cba34f11d56afb73cdd879caba8bb24a026264a5b22435864179f874d9"><div class="ttname"><a href="prot_2etharp_8h.html#af8a1068cba34f11d56afb73cdd879caba8bb24a026264a5b22435864179f874d9">ARP_REPLY</a></div><div class="ttdef"><b>Definition:</b> <a href="prot_2etharp_8h_source.html#l00084">etharp.h:84</a></div></div>
<div class="ttc" id="astructnetif_html_aee967965d999fc1a4c40a66709304e69"><div class="ttname"><a href="structnetif.html#aee967965d999fc1a4c40a66709304e69">netif::hwaddr</a></div><div class="ttdeci">u8_t hwaddr[6U]</div><div class="ttdef"><b>Definition:</b> <a href="netif_8h_source.html#l00311">netif.h:311</a></div></div>
<div class="ttc" id="adebug_8h_html_a827bc03cd7889e7c007df39d33b33d18"><div class="ttname"><a href="debug_8h.html#a827bc03cd7889e7c007df39d33b33d18">LWIP_ERROR</a></div><div class="ttdeci">#define LWIP_ERROR(message, expression, handler)</div><div class="ttdef"><b>Definition:</b> <a href="debug_8h_source.html#l00135">debug.h:135</a></div></div>
<div class="ttc" id="aprot_2ethernet_8h_html_ac08b2a99f6ff9cbafaa1cb5a6405d225"><div class="ttname"><a href="prot_2ethernet_8h.html#ac08b2a99f6ff9cbafaa1cb5a6405d225">LL_IP4_MULTICAST_ADDR_1</a></div><div class="ttdeci">#define LL_IP4_MULTICAST_ADDR_1</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ethernet_8h_source.html#l00145">ethernet.h:145</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="alwipopts_8h_html_a29f41a6ebdbb23f46688d381b3609fd1"><div class="ttname"><a href="lwipopts_8h.html#a29f41a6ebdbb23f46688d381b3609fd1">ARP_QUEUE_LEN</a></div><div class="ttdeci">#define ARP_QUEUE_LEN</div><div class="ttdef"><b>Definition:</b> <a href="lwipopts_8h_source.html#l00097">lwipopts.h:97</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_ga4caecabca98b43919dd11be1c0d4cd8e"><div class="ttname"><a href="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="arch_8h_source.html#l00122">arch.h:122</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="aprot_2etharp_8h_html_af8a1068cba34f11d56afb73cdd879cabafb58ccf8b7b11505ff2117a10bf6ff61"><div class="ttname"><a href="prot_2etharp_8h.html#af8a1068cba34f11d56afb73cdd879cabafb58ccf8b7b11505ff2117a10bf6ff61">ARP_REQUEST</a></div><div class="ttdef"><b>Definition:</b> <a href="prot_2etharp_8h_source.html#l00083">etharp.h:83</a></div></div>
<div class="ttc" id="astructnetif_html_afe1181561cb16241f3cb5ed01e567d42"><div class="ttname"><a href="structnetif.html#afe1181561cb16241f3cb5ed01e567d42">netif::hwaddr_len</a></div><div class="ttdeci">u8_t hwaddr_len</div><div class="ttdef"><b>Definition:</b> <a href="netif_8h_source.html#l00309">netif.h:309</a></div></div>
<div class="ttc" id="asnmp_8h_html_adb03de79d2e1fc600c78d8f72a757f34"><div class="ttname"><a href="snmp_8h.html#adb03de79d2e1fc600c78d8f72a757f34">mib2_add_arp_entry</a></div><div class="ttdeci">#define mib2_add_arp_entry(ni, ip)</div><div class="ttdef"><b>Definition:</b> <a href="snmp_8h_source.html#l00181">snmp.h:181</a></div></div>
<div class="ttc" id="agroup__pbuf_html_gaba88511dee3df4b631fde691f421320d"><div class="ttname"><a href="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="pbuf_8c_source.html#l00949">pbuf.c:949</a></div></div>
<div class="ttc" id="agroup__infrastructure__errors_html_ggae2e66c7d13afc90ffecd6151680fbadcab508ce0ebdf3ca735208b00a80a45c91"><div class="ttname"><a href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcab508ce0ebdf3ca735208b00a80a45c91">ERR_ARG</a></div><div class="ttdef"><b>Definition:</b> <a href="err_8h_source.html#l00096">err.h:96</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_ga70624a5deb8b9199406372a7f3603ecf"><div class="ttname"><a href="group__compiler__abstraction.html#ga70624a5deb8b9199406372a7f3603ecf">LWIP_UNUSED_ARG</a></div><div class="ttdeci">#define LWIP_UNUSED_ARG(x)</div><div class="ttdef"><b>Definition:</b> <a href="arch_8h_source.html#l00315">arch.h:315</a></div></div>
<div class="ttc" id="af_2ethernet_8h_html"><div class="ttname"><a href="f_2ethernet_8h.html">ethernet.h</a></div></div>
<div class="ttc" id="adef_8c_html_ad637280639de4066392e6b5614fa3e56"><div class="ttname"><a href="def_8c.html#ad637280639de4066392e6b5614fa3e56">lwip_htons</a></div><div class="ttdeci">u16_t lwip_htons(u16_t n)</div><div class="ttdef"><b>Definition:</b> <a href="def_8c_source.html#l00075">def.c:75</a></div></div>
<div class="ttc" id="aprot_2ethernet_8h_html_ac9426049770b40fcd9556ffbd7e56907"><div class="ttname"><a href="prot_2ethernet_8h.html#ac9426049770b40fcd9556ffbd7e56907">ETH_HWADDR_LEN</a></div><div class="ttdeci">#define ETH_HWADDR_LEN</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ethernet_8h_source.html#l00050">ethernet.h:50</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_ga9cd1d7891fe315de1201e2c6e45f4f57"><div class="ttname"><a href="group__compiler__abstraction.html#ga9cd1d7891fe315de1201e2c6e45f4f57">s8_t</a></div><div class="ttdeci">int8_t s8_t</div><div class="ttdef"><b>Definition:</b> <a href="arch_8h_source.html#l00123">arch.h:123</a></div></div>
<div class="ttc" id="aprot_2ethernet_8h_html_a10cbd9cd91e7e0ebed3a1159e385c037"><div class="ttname"><a href="prot_2ethernet_8h.html#a10cbd9cd91e7e0ebed3a1159e385c037">ETHADDR16_COPY</a></div><div class="ttdeci">#define ETHADDR16_COPY(dst, src)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ethernet_8h_source.html#l00161">ethernet.h:161</a></div></div>
<div class="ttc" id="agroup__pbuf_html_ga77f6bbd69e45e542014d9c547c7da74e"><div class="ttname"><a href="group__pbuf.html#ga77f6bbd69e45e542014d9c547c7da74e">pbuf_ref</a></div><div class="ttdeci">void pbuf_ref(struct pbuf *p)</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8c_source.html#l00821">pbuf.c:821</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="agroup__compiler__abstraction_html_gaa9d7f6eb2ee9fcc5eda3545dbb1886e0"><div class="ttname"><a href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a></div><div class="ttdeci">#define U16_F</div><div class="ttdef"><b>Definition:</b> <a href="arch_8h_source.html#l00148">arch.h:148</a></div></div>
<div class="ttc" id="adhcp_8h_html"><div class="ttname"><a href="dhcp_8h.html">dhcp.h</a></div></div>
<div class="ttc" id="aprot_2etharp_8h_html_a58f300020d1e3a91cad207410a2a82ab"><div class="ttname"><a href="prot_2etharp_8h.html#a58f300020d1e3a91cad207410a2a82ab">SIZEOF_ETHARP_HDR</a></div><div class="ttdeci">#define SIZEOF_ETHARP_HDR</div><div class="ttdef"><b>Definition:</b> <a href="prot_2etharp_8h_source.html#l00073">etharp.h:73</a></div></div>
<div class="ttc" id="agroup__infrastructure__errors_html_ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb"><div class="ttname"><a href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a></div><div class="ttdef"><b>Definition:</b> <a href="err_8h_source.html#l00063">err.h:63</a></div></div>
<div class="ttc" id="aprot_2ethernet_8h_html_a0622da8fb6eb72cd4cd7c3ea4f5a5b79"><div class="ttname"><a href="prot_2ethernet_8h.html#a0622da8fb6eb72cd4cd7c3ea4f5a5b79">ETHADDR32_COPY</a></div><div class="ttdeci">#define ETHADDR32_COPY(dst, src)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ethernet_8h_source.html#l00155">ethernet.h:155</a></div></div>
<div class="ttc" id="agroup__infrastructure__errors_html_gaf02d9da80fd66b4f986d2c53d7231ddb"><div class="ttname"><a href="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="err_8h_source.html#l00057">err.h:57</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="aetharp_8h_html"><div class="ttname"><a href="etharp_8h.html">etharp.h</a></div></div>
<div class="ttc" id="aprot_2ethernet_8h_html_a98285b6f76c2eb6b6c738da62176bce0"><div class="ttname"><a href="prot_2ethernet_8h.html#a98285b6f76c2eb6b6c738da62176bce0">LL_IP4_MULTICAST_ADDR_2</a></div><div class="ttdeci">#define LL_IP4_MULTICAST_ADDR_2</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ethernet_8h_source.html#l00146">ethernet.h:146</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="agroup__debugging__levels_html_ga77c491e468bf7d9a1bc48430c1866a96"><div class="ttname"><a href="group__debugging__levels.html#ga77c491e468bf7d9a1bc48430c1866a96">LWIP_DBG_LEVEL_WARNING</a></div><div class="ttdeci">#define LWIP_DBG_LEVEL_WARNING</div><div class="ttdef"><b>Definition:</b> <a href="debug_8h_source.html#l00055">debug.h:55</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="aprot_2ethernet_8h_html_afaf6cbccf9477c3505660e3a17860e07"><div class="ttname"><a href="prot_2ethernet_8h.html#afaf6cbccf9477c3505660e3a17860e07">LL_IP4_MULTICAST_ADDR_0</a></div><div class="ttdeci">#define LL_IP4_MULTICAST_ADDR_0</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ethernet_8h_source.html#l00144">ethernet.h:144</a></div></div>
<div class="ttc" id="astructpbuf_html_afd7bff5210a022424caa97d2f25fe8e6"><div class="ttname"><a href="structpbuf.html#afd7bff5210a022424caa97d2f25fe8e6">pbuf::type</a></div><div class="ttdeci">u8_t type</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00162">pbuf.h:162</a></div></div>
<div class="ttc" id="aprot_2etharp_8h_html_a2bfef84e6dba235e7019834a4b493a66a6e4adc4f5f733878a0173c6fb98a5f93"><div class="ttname"><a href="prot_2etharp_8h.html#a2bfef84e6dba235e7019834a4b493a66a6e4adc4f5f733878a0173c6fb98a5f93">HWTYPE_ETHERNET</a></div><div class="ttdef"><b>Definition:</b> <a href="prot_2etharp_8h_source.html#l00077">etharp.h:77</a></div></div>
<div class="ttc" id="agroup__infrastructure__errors_html_ggae2e66c7d13afc90ffecd6151680fbadca9448893187313c0c5a502ca9a9ad1c2a"><div class="ttname"><a href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadca9448893187313c0c5a502ca9a9ad1c2a">ERR_RTE</a></div><div class="ttdef"><b>Definition:</b> <a href="err_8h_source.html#l00071">err.h:71</a></div></div>
<div class="ttc" id="agroup__infrastructure__errors_html_ggae2e66c7d13afc90ffecd6151680fbadcaa9a1c5a6fdeed0aad7fe41d538482bbd"><div class="ttname"><a href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa9a1c5a6fdeed0aad7fe41d538482bbd">ERR_VAL</a></div><div class="ttdef"><b>Definition:</b> <a href="err_8h_source.html#l00075">err.h:75</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="adebug_8h_html_a63a04edf7ff63c951bd8706711956cdb"><div class="ttname"><a href="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="debug_8h_source.html#l00164">debug.h:164</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="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="adef_8h_html_a0dfd02d7c09f9c698a5a7ecc0b7287ad"><div class="ttname"><a href="def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a></div><div class="ttdeci">#define PP_HTONS(x)</div><div class="ttdef"><b>Definition:</b> <a href="def_8h_source.html#l00079">def.h:79</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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