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<div class="title">ip4_frag.c</div> </div>
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<div class="contents">
<a href="ip4__frag_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>  </div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * Copyright (c) 2001-2004 Swedish Institute of Computer Science.</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without modification,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * are permitted provided that the following conditions are met:</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * 1. Redistributions of source code must retain the above copyright notice,</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * this list of conditions and the following disclaimer.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright notice,</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * this list of conditions and the following disclaimer in the documentation</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * and/or other materials provided with the distribution.</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * 3. The name of the author may not be used to endorse or promote products</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * derived from this software without specific prior written permission.</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * This file is part of the lwIP TCP/IP stack.</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * Author: Jani Monoses <jani@iv.ro></span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> * Simon Goldschmidt</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> * original reassembly code by Adam Dunkels <adam@sics.se></span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  </div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include "<a class="code" href="opt_8h.html">net/opt.h</a>"</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  </div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#if LWIP_IPV4</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  </div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#include "<a class="code" href="ip4__frag_8h.html">net/ip4_frag.h</a>"</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#include "<a class="code" href="def_8h.html">net/def.h</a>"</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#include "<a class="code" href="inet__chksum_8h.html">net/inet_chksum.h</a>"</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor">#include "<a class="code" href="netif_8h.html">net/netif.h</a>"</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#include "<a class="code" href="stats_8h.html">net/stats.h</a>"</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#include "<a class="code" href="icmp_8h.html">net/icmp.h</a>"</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#include <<a class="code" href="string_8h.html">string.h</a>></span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  </div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#if IP_REASSEMBLY</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  </div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#ifndef IP_REASS_CHECK_OVERLAP</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">#define IP_REASS_CHECK_OVERLAP 1</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_REASS_CHECK_OVERLAP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  </div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="preprocessor">#ifndef IP_REASS_FREE_OLDEST</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor">#define IP_REASS_FREE_OLDEST 1</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_REASS_FREE_OLDEST */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  </div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="preprocessor">#define IP_REASS_FLAG_LASTFRAG 0x01</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  </div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor">#define IP_REASS_VALIDATE_TELEGRAM_FINISHED 1</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor">#define IP_REASS_VALIDATE_PBUF_QUEUED 0</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor">#define IP_REASS_VALIDATE_PBUF_DROPPED -1</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  </div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="preprocessor">#ifdef PACK_STRUCT_USE_INCLUDES</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="preprocessor"># include "arch/bpstruct.h"</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <a class="code" href="cc_8h.html#a73199061891adf1b912d20835c7d5e96">PACK_STRUCT_BEGIN</a></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="keyword">struct </span>ip_reass_helper {</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <a class="code" href="cc_8h.html#aab0b988124e37a978d9a88e7c1c778e0">PACK_STRUCT_FIELD</a>(<span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *next_pbuf);</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <a class="code" href="cc_8h.html#aab0b988124e37a978d9a88e7c1c778e0">PACK_STRUCT_FIELD</a>(<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> start);</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <a class="code" href="cc_8h.html#aab0b988124e37a978d9a88e7c1c778e0">PACK_STRUCT_FIELD</a>(<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> end);</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> } <a class="code" href="cc_8h.html#a9ebc500530d0d9e6cd0b81969f48bbc8">PACK_STRUCT_STRUCT</a>;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <a class="code" href="cc_8h.html#a465fef70f294e21cbf4ea51fc342f20e">PACK_STRUCT_END</a></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="preprocessor">#ifdef PACK_STRUCT_USE_INCLUDES</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="preprocessor"># include "arch/epstruct.h"</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="preprocessor">#endif</span></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">#define IP_ADDRESSES_AND_ID_MATCH(iphdrA, iphdrB) \</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="preprocessor"> (ip4_addr_cmp(&(iphdrA)->src, &(iphdrB)->src) && \</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="preprocessor"> ip4_addr_cmp(&(iphdrA)->dest, &(iphdrB)->dest) && \</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="preprocessor"> IPH_ID(iphdrA) == IPH_ID(iphdrB)) ? 1 : 0</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  </div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment">/* global variables */</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="keyword">static</span> <span class="keyword">struct </span>ip_reassdata *reassdatagrams;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="keyword">static</span> <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> ip_reass_pbufcount;</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  </div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment">/* function prototypes */</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="keyword">static</span> <span class="keywordtype">void</span> ip_reass_dequeue_datagram(<span class="keyword">struct</span> ip_reassdata *ipr, <span class="keyword">struct</span> ip_reassdata *prev);</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="keyword">static</span> <span class="keywordtype">int</span> ip_reass_free_complete_datagram(<span class="keyword">struct</span> ip_reassdata *ipr, <span class="keyword">struct</span> ip_reassdata *prev);</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  </div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> ip_reass_tmr(<span class="keywordtype">void</span>)</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> {</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keyword">struct </span>ip_reassdata *r, *prev = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  </div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  r = reassdatagrams;</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">while</span> (r != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="comment">/* Decrement the timer. Once it reaches 0,</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment"> * clean up the incomplete fragment assembly */</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordflow">if</span> (r->timer > 0) {</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  r->timer--;</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a4cdc3e9a4a1c01d1f7f0e723a1b2ec33">IP_REASS_DEBUG</a>, (<span class="stringliteral">"ip_reass_tmr: timer dec %"</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>)r->timer));</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  prev = r;</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  r = r->next;</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="comment">/* reassembly timed out */</span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keyword">struct </span>ip_reassdata *tmp;</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a4cdc3e9a4a1c01d1f7f0e723a1b2ec33">IP_REASS_DEBUG</a>, (<span class="stringliteral">"ip_reass_tmr: timer timed out\n"</span>));</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  tmp = r;</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="comment">/* get the next pointer before freeing */</span></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  r = r->next;</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="comment">/* free the helper struct and all enqueued pbufs */</span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  ip_reass_free_complete_datagram(tmp, prev);</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  }</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  }</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> }</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  </div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="keyword">static</span> <span class="keywordtype">int</span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> ip_reass_free_complete_datagram(<span class="keyword">struct</span> ip_reassdata *ipr, <span class="keyword">struct</span> ip_reassdata *prev)</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>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> pbufs_freed = 0;</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> clen;</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keyword">struct </span><a class="code" href="structpbuf.html">pbuf</a> *p;</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keyword">struct </span>ip_reass_helper *iprh;</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  </div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"prev != ipr"</span>, prev != ipr);</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordflow">if</span> (prev != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"prev->next == ipr"</span>, prev->next == ipr);</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  }</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  </div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipreasmfails);</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="preprocessor">#if LWIP_ICMP</span></div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  iprh = (<span class="keyword">struct </span>ip_reass_helper *)ipr->p->payload;</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  if (iprh->start == 0) {</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="comment">/* The first fragment was received, send ICMP time exceeded. */</span></div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="comment">/* First, de-queue the first pbuf from r->p. */</span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  p = ipr->p;</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  ipr->p = iprh->next_pbuf;</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="comment">/* Then, copy the original header into it. */</span></div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <a class="code" href="lwipopts_8h.html#a8c6e3c1e4f74acb16376188dbf8909ec">SMEMCPY</a>(p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>, &ipr->iphdr, <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>);</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  icmp_time_exceeded(p, <a class="code" href="icmp_8h.html#a058d0a0769bd38db99fc6fd1dad1324aa4d351874c3e2d4a4cf46569df28cd796">ICMP_TE_FRAG</a>);</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  clen = <a class="code" href="pbuf_8h.html#a5df7ac5ae59012fe9aeddba375a72190">pbuf_clen</a>(p);</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"pbufs_freed + clen <= 0xffff"</span>, pbufs_freed + clen <= 0xffff);</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  pbufs_freed += clen;</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  }</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_ICMP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  </div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="comment">/* First, free all received pbufs. The individual pbufs need to be released</span></div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="comment"> separately as they have not yet been chained */</span></div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  p = ipr->p;</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordflow">while</span> (p != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keyword">struct </span><a class="code" href="structpbuf.html">pbuf</a> *pcur;</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  iprh = (<span class="keyword">struct </span>ip_reass_helper *)p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  pcur = p;</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="comment">/* get the next pointer before freeing */</span></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  p = iprh->next_pbuf;</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  clen = <a class="code" href="pbuf_8h.html#a5df7ac5ae59012fe9aeddba375a72190">pbuf_clen</a>(pcur);</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"pbufs_freed + clen <= 0xffff"</span>, pbufs_freed + clen <= 0xffff);</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  pbufs_freed += clen;</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(pcur);</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  }</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="comment">/* Then, unchain the struct ip_reassdata from the list and free it. */</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  ip_reass_dequeue_datagram(ipr, prev);</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"ip_reass_pbufcount >= clen"</span>, ip_reass_pbufcount >= pbufs_freed);</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  ip_reass_pbufcount -= pbufs_freed;</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  </div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">return</span> pbufs_freed;</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span> }</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  </div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> <span class="preprocessor">#if IP_REASS_FREE_OLDEST</span></div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  </div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="keyword">static</span> <span class="keywordtype">int</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> ip_reass_remove_oldest_datagram(<span class="keyword">struct</span> <a class="code" href="structip__hdr.html">ip_hdr</a> *fraghdr, <span class="keywordtype">int</span> pbufs_needed)</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> {</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="comment">/* @todo Can't we simply remove the last datagram in the</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment"> * linked list behind reassdatagrams?</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keyword">struct </span>ip_reassdata *r, *oldest, *prev, *oldest_prev;</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordtype">int</span> pbufs_freed = 0, pbufs_freed_current;</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordtype">int</span> other_datagrams;</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  </div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="comment">/* Free datagrams until being allowed to enqueue 'pbufs_needed' pbufs,</span></div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="comment"> * but don't free the datagram that 'fraghdr' belongs to! */</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordflow">do</span> {</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  oldest = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  prev = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  oldest_prev = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  other_datagrams = 0;</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  r = reassdatagrams;</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keywordflow">while</span> (r != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordflow">if</span> (!IP_ADDRESSES_AND_ID_MATCH(&r->iphdr, fraghdr)) {</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="comment">/* Not the same datagram as fraghdr */</span></div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  other_datagrams++;</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="keywordflow">if</span> (oldest == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  oldest = r;</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  oldest_prev = prev;</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (r->timer <= oldest->timer) {</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="comment">/* older than the previous oldest */</span></div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  oldest = r;</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  oldest_prev = prev;</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  }</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  }</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">if</span> (r->next != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  prev = r;</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>  r = r->next;</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  }</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keywordflow">if</span> (oldest != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  pbufs_freed_current = ip_reass_free_complete_datagram(oldest, oldest_prev);</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  pbufs_freed += pbufs_freed_current;</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  }</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  } <span class="keywordflow">while</span> ((pbufs_freed < pbufs_needed) && (other_datagrams > 1));</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keywordflow">return</span> pbufs_freed;</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> }</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_REASS_FREE_OLDEST */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  </div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> <span class="keyword">static</span> <span class="keyword">struct </span>ip_reassdata*</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> ip_reass_enqueue_new_datagram(<span class="keyword">struct</span> <a class="code" href="structip__hdr.html">ip_hdr</a> *fraghdr, <span class="keywordtype">int</span> clen)</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span> {</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keyword">struct </span>ip_reassdata* ipr;</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> <span class="preprocessor">#if ! IP_REASS_FREE_OLDEST</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <a class="code" href="group__compiler__abstraction.html#ga70624a5deb8b9199406372a7f3603ecf">LWIP_UNUSED_ARG</a>(clen);</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="preprocessor">#endif</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="comment">/* No matching previous fragment found, allocate a new reassdata struct */</span></div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  ipr = (<span class="keyword">struct </span>ip_reassdata *)<a class="code" href="memp_8h.html#a2b00593d086313c267b54a976bf67aa5">memp_malloc</a>(MEMP_REASSDATA);</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keywordflow">if</span> (ipr == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> <span class="preprocessor">#if IP_REASS_FREE_OLDEST</span></div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="keywordflow">if</span> (ip_reass_remove_oldest_datagram(fraghdr, clen) >= clen) {</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  ipr = (<span class="keyword">struct </span>ip_reassdata *)<a class="code" href="memp_8h.html#a2b00593d086313c267b54a976bf67aa5">memp_malloc</a>(MEMP_REASSDATA);</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  }</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">if</span> (ipr == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_REASS_FREE_OLDEST */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  {</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <a class="code" href="stats_8h.html#a2eb4cc22608c8abe8595e90efd56ae81">IPFRAG_STATS_INC</a>(ip_frag.memerr);</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a4cdc3e9a4a1c01d1f7f0e723a1b2ec33">IP_REASS_DEBUG</a>,(<span class="stringliteral">"Failed to alloc reassdata struct\n"</span>));</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keywordflow">return</span> <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  }</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  }</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <a class="code" href="string_8h.html#ace4b911463887af5e748326323e99a23">memset</a>(ipr, 0, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> ip_reassdata));</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  ipr->timer = <a class="code" href="lwipopts_8h.html#ad41122bd0b5485a18a4415c8f953727b">IP_REASS_MAXAGE</a>;</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  </div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="comment">/* enqueue the new structure to the front of the list */</span></div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  ipr->next = reassdatagrams;</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  reassdatagrams = ipr;</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="comment">/* copy the ip header for later tests and input */</span></div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="comment">/* @todo: no ip options supported? */</span></div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <a class="code" href="lwipopts_8h.html#a8c6e3c1e4f74acb16376188dbf8909ec">SMEMCPY</a>(&(ipr->iphdr), fraghdr, <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>);</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordflow">return</span> ipr;</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> }</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  </div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> ip_reass_dequeue_datagram(<span class="keyword">struct</span> ip_reassdata *ipr, <span class="keyword">struct</span> ip_reassdata *prev)</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> {</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="comment">/* dequeue the reass struct */</span></div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keywordflow">if</span> (reassdatagrams == ipr) {</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="comment">/* it was the first in the list */</span></div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  reassdatagrams = ipr->next;</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="comment">/* it wasn't the first, so it must have a valid 'prev' */</span></div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"sanity check linked list"</span>, prev != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  prev->next = ipr->next;</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>  </div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  <span class="comment">/* now we can free the ip_reassdata struct */</span></div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <a class="code" href="memp_8h.html#aecd94926b7c2a0e23ae195f4ae97581f">memp_free</a>(MEMP_REASSDATA, ipr);</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span> }</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  </div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span> <span class="keyword">static</span> <span class="keywordtype">int</span></div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span> ip_reass_chain_frag_into_datagram_and_validate(<span class="keyword">struct</span> ip_reassdata *ipr, <span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *new_p, <span class="keywordtype">int</span> is_last)</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>  <span class="keyword">struct </span>ip_reass_helper *iprh, *iprh_tmp, *iprh_prev=<a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keyword">struct </span><a class="code" href="structpbuf.html">pbuf</a> *q;</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> offset, <a class="code" href="structpbuf.html#a6f82449625e36e294f5d210268c0703f">len</a>;</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keyword">struct </span><a class="code" href="structip__hdr.html">ip_hdr</a> *fraghdr;</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="keywordtype">int</span> valid = 1;</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  </div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  <span class="comment">/* Extract length and fragment offset from current fragment */</span></div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  fraghdr = (<span class="keyword">struct </span><a class="code" href="structip__hdr.html">ip_hdr</a>*)new_p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  len = <a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#aec0328fe4711b8c1ef4dd6709e4fd6d5">IPH_LEN</a>(fraghdr)) - <a class="code" href="prot_2ip4_8h.html#a7c60caeb708571a07a44309c10ec3a01">IPH_HL</a>(fraghdr) * 4;</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  offset = (<a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#a559dce3878f1d6a46bcb4cb312962397">IPH_OFFSET</a>(fraghdr)) & <a class="code" href="prot_2ip4_8h.html#ad059798b16d1f615b5af8770175121ba">IP_OFFMASK</a>) * 8;</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  </div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <span class="comment">/* overwrite the fragment's ip header from the pbuf with our helper struct,</span></div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span> <span class="comment"> * and setup the embedded helper structure. */</span></div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="comment">/* make sure the struct ip_reass_helper fits into the IP header */</span></div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"sizeof(struct ip_reass_helper) <= IP_HLEN"</span>,</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="keyword">sizeof</span>(<span class="keyword">struct</span> ip_reass_helper) <= <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>);</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  iprh = (<span class="keyword">struct </span>ip_reass_helper*)new_p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  iprh->next_pbuf = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  iprh->start = offset;</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  iprh->end = offset + len;</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  </div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  <span class="comment">/* Iterate through until we either get to the end of the list (append),</span></div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span> <span class="comment"> * or we find one with a larger offset (insert). */</span></div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  for (q = ipr->p; q != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;) {</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  iprh_tmp = (<span class="keyword">struct </span>ip_reass_helper*)q-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  if (iprh->start < iprh_tmp->start) {</div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="comment">/* the new pbuf should be inserted before this */</span></div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  iprh->next_pbuf = q;</div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keywordflow">if</span> (iprh_prev != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="comment">/* not the fragment with the lowest offset */</span></div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span> <span class="preprocessor">#if IP_REASS_CHECK_OVERLAP</span></div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keywordflow">if</span> ((iprh->start < iprh_prev->end) || (iprh->end > iprh_tmp->start)) {</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="comment">/* fragment overlaps with previous or following, throw away */</span></div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="keywordflow">goto</span> freepbuf;</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  }</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_REASS_CHECK_OVERLAP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  iprh_prev->next_pbuf = new_p;</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  <span class="keywordflow">if</span> (iprh_prev->end != iprh->start) {</div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="comment">/* There is a fragment missing between the current</span></div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span> <span class="comment"> * and the previous fragment */</span></div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  valid = 0;</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>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span> <span class="preprocessor">#if IP_REASS_CHECK_OVERLAP</span></div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <span class="keywordflow">if</span> (iprh->end > iprh_tmp->start) {</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <span class="comment">/* fragment overlaps with following, throw away */</span></div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <span class="keywordflow">goto</span> freepbuf;</div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  }</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_REASS_CHECK_OVERLAP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  <span class="comment">/* fragment with the lowest offset */</span></div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  ipr->p = new_p;</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>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (iprh->start == iprh_tmp->start) {</div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="comment">/* received the same datagram twice: no need to keep the datagram */</span></div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  <span class="keywordflow">goto</span> freepbuf;</div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span> <span class="preprocessor">#if IP_REASS_CHECK_OVERLAP</span></div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (iprh->start < iprh_tmp->end) {</div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="comment">/* overlap: no need to keep the new datagram */</span></div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="keywordflow">goto</span> freepbuf;</div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_REASS_CHECK_OVERLAP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="comment">/* Check if the fragments received so far have no holes. */</span></div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="keywordflow">if</span> (iprh_prev != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  <span class="keywordflow">if</span> (iprh_prev->end != iprh_tmp->start) {</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  <span class="comment">/* There is a fragment missing between the current</span></div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span> <span class="comment"> * and the previous fragment */</span></div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  valid = 0;</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  }</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  }</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  }</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  q = iprh_tmp->next_pbuf;</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  iprh_prev = iprh_tmp;</div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  }</div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  </div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <span class="comment">/* If q is NULL, then we made it to the end of the list. Determine what to do now */</span></div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  <span class="keywordflow">if</span> (q == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keywordflow">if</span> (iprh_prev != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  <span class="comment">/* this is (for now), the fragment with the highest offset:</span></div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span> <span class="comment"> * chain it to the last fragment */</span></div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span> <span class="preprocessor">#if IP_REASS_CHECK_OVERLAP</span></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">"check fragments don't overlap"</span>, iprh_prev->end <= iprh->start);</div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_REASS_CHECK_OVERLAP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  iprh_prev->next_pbuf = new_p;</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <span class="keywordflow">if</span> (iprh_prev->end != iprh->start) {</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  valid = 0;</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  }</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span> <span class="preprocessor">#if IP_REASS_CHECK_OVERLAP</span></div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"no previous fragment, this must be the first fragment!"</span>,</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  ipr->p == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_REASS_CHECK_OVERLAP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  <span class="comment">/* this is the first fragment we ever received for this ip datagram */</span></div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  ipr->p = new_p;</div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  }</div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  }</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  </div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  <span class="comment">/* At this point, the validation part begins: */</span></div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <span class="comment">/* If we already received the last fragment */</span></div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  <span class="keywordflow">if</span> (is_last || ((ipr->flags & IP_REASS_FLAG_LASTFRAG) != 0)) {</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  <span class="comment">/* and had no holes so far */</span></div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  <span class="keywordflow">if</span> (valid) {</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  <span class="comment">/* then check if the rest of the fragments is here */</span></div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  <span class="comment">/* Check if the queue starts with the first datagram */</span></div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <span class="keywordflow">if</span> ((ipr->p == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) || (((<span class="keyword">struct</span> ip_reass_helper*)ipr->p->payload)->start != 0)) {</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  valid = 0;</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  <span class="comment">/* and check that there are no holes after this datagram */</span></div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  iprh_prev = iprh;</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  q = iprh->next_pbuf;</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  <span class="keywordflow">while</span> (q != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  iprh = (<span class="keyword">struct </span>ip_reass_helper*)q-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  if (iprh_prev->end != iprh->start) {</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  valid = 0;</div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  }</div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  iprh_prev = iprh;</div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  q = iprh->next_pbuf;</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>  <span class="comment">/* if still valid, all fragments are received</span></div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span> <span class="comment"> * (because to the MF==0 already arrived */</span></div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="keywordflow">if</span> (valid) {</div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"sanity check"</span>, ipr->p != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"sanity check"</span>,</div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  ((<span class="keyword">struct</span> ip_reass_helper*)ipr->p->payload) != iprh);</div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"validate_datagram:next_pbuf!=NULL"</span>,</div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  iprh->next_pbuf == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  }</div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  }</div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  }</div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  <span class="comment">/* If valid is 0 here, there are some fragments missing in the middle</span></div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span> <span class="comment"> * (since MF == 0 has already arrived). Such datagrams simply time out if</span></div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span> <span class="comment"> * no more fragments are received... */</span></div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  <span class="keywordflow">return</span> valid ? IP_REASS_VALIDATE_TELEGRAM_FINISHED : IP_REASS_VALIDATE_PBUF_QUEUED;</div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  }</div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  <span class="comment">/* If we come here, not all fragments were received, yet! */</span></div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  <span class="keywordflow">return</span> IP_REASS_VALIDATE_PBUF_QUEUED; <span class="comment">/* not yet valid! */</span></div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span> <span class="preprocessor">#if IP_REASS_CHECK_OVERLAP</span></div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span> freepbuf:</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  ip_reass_pbufcount -= <a class="code" href="pbuf_8h.html#a5df7ac5ae59012fe9aeddba375a72190">pbuf_clen</a>(new_p);</div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(new_p);</div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  <span class="keywordflow">return</span> IP_REASS_VALIDATE_PBUF_DROPPED;</div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_REASS_CHECK_OVERLAP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span> }</div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  </div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span> <span class="keyword">struct </span><a class="code" href="structpbuf.html">pbuf</a> *</div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span> ip4_reass(<span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *p)</div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span> {</div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  <span class="keyword">struct </span><a class="code" href="structpbuf.html">pbuf</a> *r;</div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="keyword">struct </span><a class="code" href="structip__hdr.html">ip_hdr</a> *fraghdr;</div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  <span class="keyword">struct </span>ip_reassdata *ipr;</div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  <span class="keyword">struct </span>ip_reass_helper *iprh;</div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> offset, len, clen;</div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  <span class="keywordtype">int</span> valid;</div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  <span class="keywordtype">int</span> is_last;</div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  </div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  <a class="code" href="stats_8h.html#a2eb4cc22608c8abe8595e90efd56ae81">IPFRAG_STATS_INC</a>(ip_frag.recv);</div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipreasmreqds);</div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  </div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  fraghdr = (<span class="keyword">struct </span><a class="code" href="structip__hdr.html">ip_hdr</a>*)p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</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>  if ((<a class="code" href="prot_2ip4_8h.html#a7c60caeb708571a07a44309c10ec3a01">IPH_HL</a>(fraghdr) * 4) != <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>) {</div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a4cdc3e9a4a1c01d1f7f0e723a1b2ec33">IP_REASS_DEBUG</a>,(<span class="stringliteral">"ip4_reass: IP options currently not supported!\n"</span>));</div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <a class="code" href="stats_8h.html#a2eb4cc22608c8abe8595e90efd56ae81">IPFRAG_STATS_INC</a>(ip_frag.err);</div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  <span class="keywordflow">goto</span> nullreturn;</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>  </div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  offset = (<a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#a559dce3878f1d6a46bcb4cb312962397">IPH_OFFSET</a>(fraghdr)) & <a class="code" href="prot_2ip4_8h.html#ad059798b16d1f615b5af8770175121ba">IP_OFFMASK</a>) * 8;</div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  len = <a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#aec0328fe4711b8c1ef4dd6709e4fd6d5">IPH_LEN</a>(fraghdr)) - <a class="code" href="prot_2ip4_8h.html#a7c60caeb708571a07a44309c10ec3a01">IPH_HL</a>(fraghdr) * 4;</div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  </div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  <span class="comment">/* Check if we are allowed to enqueue more datagrams. */</span></div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  clen = <a class="code" href="pbuf_8h.html#a5df7ac5ae59012fe9aeddba375a72190">pbuf_clen</a>(p);</div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  <span class="keywordflow">if</span> ((ip_reass_pbufcount + clen) > <a class="code" href="lwipopts_8h.html#a29084a46d7d4be30e8029d356bca0394">IP_REASS_MAX_PBUFS</a>) {</div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span> <span class="preprocessor">#if IP_REASS_FREE_OLDEST</span></div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  <span class="keywordflow">if</span> (!ip_reass_remove_oldest_datagram(fraghdr, clen) ||</div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  ((ip_reass_pbufcount + clen) > <a class="code" href="lwipopts_8h.html#a29084a46d7d4be30e8029d356bca0394">IP_REASS_MAX_PBUFS</a>))</div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_REASS_FREE_OLDEST */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  {</div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  <span class="comment">/* No datagram could be freed and still too many pbufs enqueued */</span></div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a4cdc3e9a4a1c01d1f7f0e723a1b2ec33">IP_REASS_DEBUG</a>,(<span class="stringliteral">"ip4_reass: Overflow condition: pbufct=%d, clen=%d, MAX=%d\n"</span>,</div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  ip_reass_pbufcount, clen, <a class="code" href="lwipopts_8h.html#a29084a46d7d4be30e8029d356bca0394">IP_REASS_MAX_PBUFS</a>));</div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  <a class="code" href="stats_8h.html#a2eb4cc22608c8abe8595e90efd56ae81">IPFRAG_STATS_INC</a>(ip_frag.memerr);</div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  <span class="comment">/* @todo: send ICMP time exceeded here? */</span></div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  <span class="comment">/* drop this pbuf */</span></div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  <span class="keywordflow">goto</span> nullreturn;</div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  }</div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  }</div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  </div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <span class="comment">/* Look for the datagram the fragment belongs to in the current datagram queue,</span></div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span> <span class="comment"> * remembering the previous in the queue for later dequeueing. */</span></div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  <span class="keywordflow">for</span> (ipr = reassdatagrams; ipr != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>; ipr = ipr->next) {</div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  <span class="comment">/* Check if the incoming fragment matches the one currently present</span></div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span> <span class="comment"> in the reassembly buffer. If so, we proceed with copying the</span></div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span> <span class="comment"> fragment into the buffer. */</span></div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  <span class="keywordflow">if</span> (IP_ADDRESSES_AND_ID_MATCH(&ipr->iphdr, fraghdr)) {</div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a4cdc3e9a4a1c01d1f7f0e723a1b2ec33">IP_REASS_DEBUG</a>, (<span class="stringliteral">"ip4_reass: matching previous fragment ID=%"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">"\n"</span>,</div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  <a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#ae79eaecc0bf9e4dbb9e47ea56ad2157a">IPH_ID</a>(fraghdr))));</div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  <a class="code" href="stats_8h.html#a2eb4cc22608c8abe8595e90efd56ae81">IPFRAG_STATS_INC</a>(ip_frag.cachehit);</div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  }</div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  }</div>
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  </div>
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  <span class="keywordflow">if</span> (ipr == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  <span class="comment">/* Enqueue a new datagram into the datagram queue */</span></div>
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  ipr = ip_reass_enqueue_new_datagram(fraghdr, clen);</div>
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  <span class="comment">/* Bail if unable to enqueue */</span></div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  <span class="keywordflow">if</span> (ipr == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  <span class="keywordflow">goto</span> nullreturn;</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>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  <span class="keywordflow">if</span> (((<a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#a559dce3878f1d6a46bcb4cb312962397">IPH_OFFSET</a>(fraghdr)) & <a class="code" href="prot_2ip4_8h.html#ad059798b16d1f615b5af8770175121ba">IP_OFFMASK</a>) == 0) &&</div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  ((<a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#a559dce3878f1d6a46bcb4cb312962397">IPH_OFFSET</a>(&ipr->iphdr)) & <a class="code" href="prot_2ip4_8h.html#ad059798b16d1f615b5af8770175121ba">IP_OFFMASK</a>) != 0)) {</div>
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  <span class="comment">/* ipr->iphdr is not the header from the first fragment, but fraghdr is</span></div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span> <span class="comment"> * -> copy fraghdr into ipr->iphdr since we want to have the header</span></div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span> <span class="comment"> * of the first fragment (for ICMP time exceeded and later, for copying</span></div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span> <span class="comment"> * all options, if supported)*/</span></div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  <a class="code" href="lwipopts_8h.html#a8c6e3c1e4f74acb16376188dbf8909ec">SMEMCPY</a>(&ipr->iphdr, fraghdr, <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>);</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="l00571"></a><span class="lineno"> 571</span>  </div>
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  <span class="comment">/* At this point, we have either created a new entry or pointing</span></div>
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span> <span class="comment"> * to an existing one */</span></div>
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  </div>
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  <span class="comment">/* check for 'no more fragments', and update queue entry*/</span></div>
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  is_last = (<a class="code" href="prot_2ip4_8h.html#a559dce3878f1d6a46bcb4cb312962397">IPH_OFFSET</a>(fraghdr) & <a class="code" href="def_8h.html#a7d17b88eabf7766c0bfa89d8f965f67e">PP_NTOHS</a>(<a class="code" href="prot_2ip4_8h.html#ae8afe1e04bb9bad791443556c3b2cd73">IP_MF</a>)) == 0;</div>
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  <span class="keywordflow">if</span> (is_last) {</div>
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> datagram_len = (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)(offset + len);</div>
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  <span class="keywordflow">if</span> ((datagram_len < offset) || (datagram_len > (0xFFFF - <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>))) {</div>
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  <span class="comment">/* u16_t overflow, cannot handle this */</span></div>
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  <span class="keywordflow">goto</span> nullreturn;</div>
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  }</div>
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  }</div>
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  <span class="comment">/* find the right place to insert this pbuf */</span></div>
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  <span class="comment">/* @todo: trim pbufs if fragments are overlapping */</span></div>
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  valid = ip_reass_chain_frag_into_datagram_and_validate(ipr, p, is_last);</div>
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  <span class="keywordflow">if</span> (valid == IP_REASS_VALIDATE_PBUF_DROPPED) {</div>
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  <span class="keywordflow">goto</span> nullreturn;</div>
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  }</div>
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  <span class="comment">/* if we come here, the pbuf has been enqueued */</span></div>
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  </div>
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span>  <span class="comment">/* Track the current number of pbufs current 'in-flight', in order to limit</span></div>
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span> <span class="comment"> the number of fragments that may be enqueued at any one time</span></div>
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span> <span class="comment"> (overflow checked by testing against IP_REASS_MAX_PBUFS) */</span></div>
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  ip_reass_pbufcount = (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)(ip_reass_pbufcount + clen);</div>
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  <span class="keywordflow">if</span> (is_last) {</div>
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> datagram_len = (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)(offset + len);</div>
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  ipr->datagram_len = datagram_len;</div>
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  ipr->flags |= IP_REASS_FLAG_LASTFRAG;</div>
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a4cdc3e9a4a1c01d1f7f0e723a1b2ec33">IP_REASS_DEBUG</a>,</div>
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  (<span class="stringliteral">"ip4_reass: last fragment seen, total len %"</span><a class="code" href="group__compiler__abstraction.html#gac05a82d37afb251470f5e17ca15ab6e9">S16_F</a><span class="stringliteral">"\n"</span>,</div>
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  ipr->datagram_len));</div>
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  }</div>
<div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  </div>
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  <span class="keywordflow">if</span> (valid == IP_REASS_VALIDATE_TELEGRAM_FINISHED) {</div>
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  <span class="keyword">struct </span>ip_reassdata *ipr_prev;</div>
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  <span class="comment">/* the totally last fragment (flag more fragments = 0) was received at least</span></div>
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span> <span class="comment"> * once AND all fragments are received */</span></div>
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  ipr->datagram_len += <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>;</div>
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  </div>
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  <span class="comment">/* save the second pbuf before copying the header over the pointer */</span></div>
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  r = ((<span class="keyword">struct </span>ip_reass_helper*)ipr->p->payload)->next_pbuf;</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>  <span class="comment">/* copy the original ip header back to the first pbuf */</span></div>
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  fraghdr = (<span class="keyword">struct </span><a class="code" href="structip__hdr.html">ip_hdr</a>*)(ipr->p->payload);</div>
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  <a class="code" href="lwipopts_8h.html#a8c6e3c1e4f74acb16376188dbf8909ec">SMEMCPY</a>(fraghdr, &ipr->iphdr, <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>);</div>
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  <a class="code" href="prot_2ip4_8h.html#a069cb9b3765c4bdd63d13efb2df0206e">IPH_LEN_SET</a>(fraghdr, <a class="code" href="def_8c.html#ad637280639de4066392e6b5614fa3e56">lwip_htons</a>(ipr->datagram_len));</div>
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  <a class="code" href="prot_2ip4_8h.html#a4c2189e1400dca1c0f785de96ceda2b6">IPH_OFFSET_SET</a>(fraghdr, 0);</div>
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  <a class="code" href="prot_2ip4_8h.html#aec30403fb98b013bd094688de55cdaef">IPH_CHKSUM_SET</a>(fraghdr, 0);</div>
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  <span class="comment">/* @todo: do we need to set/calculate the correct checksum? */</span></div>
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span> <span class="preprocessor">#if CHECKSUM_GEN_IP</span></div>
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  <a class="code" href="netif_8h.html#ad968df1b35c2fae368e087966e3bc677">IF__NETIF_CHECKSUM_ENABLED</a>(<a class="code" href="ip_8h.html#ae214afa9d3f1b26fc8d538436b8fa3c4">ip_current_input_netif</a>(), NETIF_CHECKSUM_GEN_IP) {</div>
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  <a class="code" href="prot_2ip4_8h.html#aec30403fb98b013bd094688de55cdaef">IPH_CHKSUM_SET</a>(fraghdr, <a class="code" href="inet__chksum_8h.html#a34f1aa1587562a09e11b704b51bab043">inet_chksum</a>(fraghdr, <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>));</div>
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  }</div>
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span> <span class="preprocessor">#endif </span><span class="comment">/* CHECKSUM_GEN_IP */</span><span class="preprocessor"></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>  p = ipr->p;</div>
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  </div>
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  <span class="comment">/* chain together the pbufs contained within the reass_data list. */</span></div>
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  <span class="keywordflow">while</span> (r != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  iprh = (<span class="keyword">struct </span>ip_reass_helper*)r-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  </div>
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  <span class="comment">/* hide the ip header for every succeeding fragment */</span></div>
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span>  <a class="code" href="pbuf_8h.html#aaa17c1951cf2d207b6adfd3947d91f00">pbuf_header</a>(r, -<a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>);</div>
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  <a class="code" href="group__pbuf.html#ga82429084fe29015509c9b4a072707cd4">pbuf_cat</a>(p, r);</div>
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  r = iprh->next_pbuf;</div>
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  }</div>
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  </div>
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  <span class="comment">/* find the previous entry in the linked list */</span></div>
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  <span class="keywordflow">if</span> (ipr == reassdatagrams) {</div>
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  ipr_prev = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  <span class="keywordflow">for</span> (ipr_prev = reassdatagrams; ipr_prev != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>; ipr_prev = ipr_prev->next) {</div>
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  <span class="keywordflow">if</span> (ipr_prev->next == ipr) {</div>
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  }</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>  }</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>  <span class="comment">/* release the sources allocate for the fragment queue entry */</span></div>
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  ip_reass_dequeue_datagram(ipr, ipr_prev);</div>
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  </div>
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  <span class="comment">/* and adjust the number of pbufs currently queued for reassembly. */</span></div>
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  ip_reass_pbufcount -= <a class="code" href="pbuf_8h.html#a5df7ac5ae59012fe9aeddba375a72190">pbuf_clen</a>(p);</div>
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  </div>
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipreasmoks);</div>
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  </div>
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  <span class="comment">/* Return the pbuf chain */</span></div>
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  <span class="keywordflow">return</span> p;</div>
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  }</div>
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  <span class="comment">/* the datagram is not (yet?) reassembled completely */</span></div>
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a4cdc3e9a4a1c01d1f7f0e723a1b2ec33">IP_REASS_DEBUG</a>,(<span class="stringliteral">"ip_reass_pbufcount: %d out\n"</span>, ip_reass_pbufcount));</div>
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  <span class="keywordflow">return</span> <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</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> nullreturn:</div>
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a4cdc3e9a4a1c01d1f7f0e723a1b2ec33">IP_REASS_DEBUG</a>,(<span class="stringliteral">"ip4_reass: nullreturn\n"</span>));</div>
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  <a class="code" href="stats_8h.html#a2eb4cc22608c8abe8595e90efd56ae81">IPFRAG_STATS_INC</a>(ip_frag.drop);</div>
<div class="line"><a name="l00668"></a><span class="lineno"> 668</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  <span class="keywordflow">return</span> <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span> }</div>
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_REASSEMBLY */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  </div>
<div class="line"><a name="l00673"></a><span class="lineno"> 673</span> <span class="preprocessor">#if IP_FRAG</span></div>
<div class="line"><a name="l00674"></a><span class="lineno"> 674</span> <span class="preprocessor">#if !LWIP_NETIF_TX_SINGLE_PBUF</span></div>
<div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  </div>
<div class="line"><a name="l00676"></a><span class="lineno"> 676</span> <span class="keyword">static</span> <span class="keyword">struct </span>pbuf_custom_ref*</div>
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span> ip_frag_alloc_pbuf_custom_ref(<span class="keywordtype">void</span>)</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="keywordflow">return</span> (<span class="keyword">struct</span> pbuf_custom_ref*)<a class="code" href="memp_8h.html#a2b00593d086313c267b54a976bf67aa5">memp_malloc</a>(MEMP_FRAG_PBUF);</div>
<div class="line"><a name="l00680"></a><span class="lineno"> 680</span> }</div>
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  </div>
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span> ip_frag_free_pbuf_custom_ref(<span class="keyword">struct</span> pbuf_custom_ref* p)</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>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"p != NULL"</span>, p != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  <a class="code" href="memp_8h.html#aecd94926b7c2a0e23ae195f4ae97581f">memp_free</a>(MEMP_FRAG_PBUF, p);</div>
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span> }</div>
<div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  </div>
<div class="line"><a name="l00692"></a><span class="lineno"> 692</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span> ipfrag_free_pbuf_custom(<span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *p)</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="keyword">struct </span>pbuf_custom_ref *pcr = (<span class="keyword">struct </span>pbuf_custom_ref*)p;</div>
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"pcr != NULL"</span>, pcr != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"pcr == p"</span>, (<span class="keywordtype">void</span>*)pcr == (<span class="keywordtype">void</span>*)p);</div>
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  <span class="keywordflow">if</span> (pcr->original != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(pcr->original);</div>
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  }</div>
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  ip_frag_free_pbuf_custom_ref(pcr);</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> <span class="preprocessor">#endif </span><span class="comment">/* !LWIP_NETIF_TX_SINGLE_PBUF */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  </div>
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l00718"></a><span class="lineno"> 718</span> ip4_frag(<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>, <span class="keyword">const</span> ip4_addr_t *dest)</div>
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span> {</div>
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  <span class="keyword">struct </span><a class="code" href="structpbuf.html">pbuf</a> *rambuf;</div>
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span> <span class="preprocessor">#if !LWIP_NETIF_TX_SINGLE_PBUF</span></div>
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  <span class="keyword">struct </span><a class="code" href="structpbuf.html">pbuf</a> *newpbuf;</div>
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> newpbuflen = 0;</div>
<div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> left_to_copy;</div>
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  <span class="keyword">struct </span><a class="code" href="structip__hdr.html">ip_hdr</a> *original_iphdr;</div>
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  <span class="keyword">struct </span><a class="code" href="structip__hdr.html">ip_hdr</a> *iphdr;</div>
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  <span class="keyword">const</span> <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> nfb = (<a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#aca7d56b4e0f822b0ced2885f222b8d48">mtu</a> - <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>) / 8;</div>
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> left, fragsize;</div>
<div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> ofo;</div>
<div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  <span class="keywordtype">int</span> last;</div>
<div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> poff = <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>;</div>
<div class="line"><a name="l00733"></a><span class="lineno"> 733</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> tmp;</div>
<div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  </div>
<div class="line"><a name="l00735"></a><span class="lineno"> 735</span>  original_iphdr = (<span class="keyword">struct </span><a class="code" href="structip__hdr.html">ip_hdr</a> *)p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00736"></a><span class="lineno"> 736</span>  iphdr = original_iphdr;</div>
<div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  <a class="code" href="debug_8h.html#a827bc03cd7889e7c007df39d33b33d18">LWIP_ERROR</a>(<span class="stringliteral">"ip4_frag() does not support IP options"</span>, <a class="code" href="prot_2ip4_8h.html#a7c60caeb708571a07a44309c10ec3a01">IPH_HL</a>(iphdr) * 4 == <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>, <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa9a1c5a6fdeed0aad7fe41d538482bbd">ERR_VAL</a>);</div>
<div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  </div>
<div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  <span class="comment">/* Save original offset */</span></div>
<div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  tmp = <a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#a559dce3878f1d6a46bcb4cb312962397">IPH_OFFSET</a>(iphdr));</div>
<div class="line"><a name="l00741"></a><span class="lineno"> 741</span>  ofo = tmp & <a class="code" href="prot_2ip4_8h.html#ad059798b16d1f615b5af8770175121ba">IP_OFFMASK</a>;</div>
<div class="line"><a name="l00742"></a><span class="lineno"> 742</span>  <a class="code" href="debug_8h.html#a827bc03cd7889e7c007df39d33b33d18">LWIP_ERROR</a>(<span class="stringliteral">"ip_frag(): MF already set"</span>, (tmp & <a class="code" href="prot_2ip4_8h.html#ae8afe1e04bb9bad791443556c3b2cd73">IP_MF</a>) == 0, <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa9a1c5a6fdeed0aad7fe41d538482bbd">ERR_VAL</a>);</div>
<div class="line"><a name="l00743"></a><span class="lineno"> 743</span>  </div>
<div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  left = p-><a class="code" href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a> - <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>;</div>
<div class="line"><a name="l00745"></a><span class="lineno"> 745</span>  </div>
<div class="line"><a name="l00746"></a><span class="lineno"> 746</span>  <span class="keywordflow">while</span> (left) {</div>
<div class="line"><a name="l00747"></a><span class="lineno"> 747</span>  <span class="comment">/* Fill this fragment */</span></div>
<div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  fragsize = <a class="code" href="def_8h.html#a748f5df614a3fc989e8900fd229d6e4e">LWIP_MIN</a>(left, nfb * 8);</div>
<div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  </div>
<div class="line"><a name="l00750"></a><span class="lineno"> 750</span> <span class="preprocessor">#if LWIP_NETIF_TX_SINGLE_PBUF</span></div>
<div class="line"><a name="l00751"></a><span class="lineno"> 751</span>  rambuf = <a class="code" href="group__pbuf.html#gacfcb0a2af918658ba0afe36499c65f47">pbuf_alloc</a>(<a class="code" href="group__pbuf.html#ggaee1baa59bb2f85ba575b5a8619ac1ebfafcc1e506061ba69dfa142eb6b3da5f13">PBUF_IP</a>, fragsize, <a class="code" href="group__pbuf.html#ggab7e0e32fcc292c0d7107721766ed92fbac5e9f28455bca98944a030d4b84ecfab">PBUF_RAM</a>);</div>
<div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  <span class="keywordflow">if</span> (rambuf == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00753"></a><span class="lineno"> 753</span>  <span class="keywordflow">goto</span> memerr;</div>
<div class="line"><a name="l00754"></a><span class="lineno"> 754</span>  }</div>
<div class="line"><a name="l00755"></a><span class="lineno"> 755</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"this needs a pbuf in one piece!"</span>,</div>
<div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  (rambuf-><a class="code" href="structpbuf.html#a6f82449625e36e294f5d210268c0703f">len</a> == rambuf-><a class="code" href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a>) && (rambuf-><a class="code" href="structpbuf.html#a5e5763c94fd18d78937b0b58ce7df341">next</a> == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>));</div>
<div class="line"><a name="l00757"></a><span class="lineno"> 757</span>  poff += <a class="code" href="group__pbuf.html#gac2f1f58fd36042e82af46f5015720899">pbuf_copy_partial</a>(p, rambuf-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>, fragsize, poff);</div>
<div class="line"><a name="l00758"></a><span class="lineno"> 758</span>  <span class="comment">/* make room for the IP header */</span></div>
<div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  <span class="keywordflow">if</span> (<a class="code" href="pbuf_8h.html#aaa17c1951cf2d207b6adfd3947d91f00">pbuf_header</a>(rambuf, <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>)) {</div>
<div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(rambuf);</div>
<div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  <span class="keywordflow">goto</span> memerr;</div>
<div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  }</div>
<div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  <span class="comment">/* fill in the IP header */</span></div>
<div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  <a class="code" href="lwipopts_8h.html#a8c6e3c1e4f74acb16376188dbf8909ec">SMEMCPY</a>(rambuf-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>, original_iphdr, <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>);</div>
<div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  iphdr = (<span class="keyword">struct </span><a class="code" href="structip__hdr.html">ip_hdr</a>*)rambuf-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00766"></a><span class="lineno"> 766</span> #<span class="keywordflow">else</span> <span class="comment">/* LWIP_NETIF_TX_SINGLE_PBUF */</span></div>
<div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  <span class="comment">/* When not using a static buffer, create a chain of pbufs.</span></div>
<div class="line"><a name="l00768"></a><span class="lineno"> 768</span> <span class="comment"> * The first will be a PBUF_RAM holding the link and IP header.</span></div>
<div class="line"><a name="l00769"></a><span class="lineno"> 769</span> <span class="comment"> * The rest will be PBUF_REFs mirroring the pbuf chain to be fragged,</span></div>
<div class="line"><a name="l00770"></a><span class="lineno"> 770</span> <span class="comment"> * but limited to the size of an mtu.</span></div>
<div class="line"><a name="l00771"></a><span class="lineno"> 771</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00772"></a><span class="lineno"> 772</span>  rambuf = <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_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>, <a class="code" href="group__pbuf.html#ggab7e0e32fcc292c0d7107721766ed92fbac5e9f28455bca98944a030d4b84ecfab">PBUF_RAM</a>);</div>
<div class="line"><a name="l00773"></a><span class="lineno"> 773</span>  <span class="keywordflow">if</span> (rambuf == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00774"></a><span class="lineno"> 774</span>  <span class="keywordflow">goto</span> memerr;</div>
<div class="line"><a name="l00775"></a><span class="lineno"> 775</span>  }</div>
<div class="line"><a name="l00776"></a><span class="lineno"> 776</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"this needs a pbuf in one piece!"</span>,</div>
<div class="line"><a name="l00777"></a><span class="lineno"> 777</span>  (p-><a class="code" href="structpbuf.html#a6f82449625e36e294f5d210268c0703f">len</a> >= (<a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>)));</div>
<div class="line"><a name="l00778"></a><span class="lineno"> 778</span>  <a class="code" href="lwipopts_8h.html#a8c6e3c1e4f74acb16376188dbf8909ec">SMEMCPY</a>(rambuf-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>, original_iphdr, <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>);</div>
<div class="line"><a name="l00779"></a><span class="lineno"> 779</span>  iphdr = (<span class="keyword">struct </span><a class="code" href="structip__hdr.html">ip_hdr</a> *)rambuf-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>;</div>
<div class="line"><a name="l00780"></a><span class="lineno"> 780</span>  </div>
<div class="line"><a name="l00781"></a><span class="lineno"> 781</span>  left_to_copy = fragsize;</div>
<div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  while (left_to_copy) {</div>
<div class="line"><a name="l00783"></a><span class="lineno"> 783</span>  <span class="keyword">struct </span>pbuf_custom_ref *pcr;</div>
<div class="line"><a name="l00784"></a><span class="lineno"> 784</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> plen = p-><a class="code" href="structpbuf.html#a6f82449625e36e294f5d210268c0703f">len</a> - poff;</div>
<div class="line"><a name="l00785"></a><span class="lineno"> 785</span>  newpbuflen = <a class="code" href="def_8h.html#a748f5df614a3fc989e8900fd229d6e4e">LWIP_MIN</a>(left_to_copy, plen);</div>
<div class="line"><a name="l00786"></a><span class="lineno"> 786</span>  <span class="comment">/* Is this pbuf already empty? */</span></div>
<div class="line"><a name="l00787"></a><span class="lineno"> 787</span>  <span class="keywordflow">if</span> (!newpbuflen) {</div>
<div class="line"><a name="l00788"></a><span class="lineno"> 788</span>  poff = 0;</div>
<div class="line"><a name="l00789"></a><span class="lineno"> 789</span>  p = p-><a class="code" href="structpbuf.html#a5e5763c94fd18d78937b0b58ce7df341">next</a>;</div>
<div class="line"><a name="l00790"></a><span class="lineno"> 790</span>  <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00791"></a><span class="lineno"> 791</span>  }</div>
<div class="line"><a name="l00792"></a><span class="lineno"> 792</span>  pcr = ip_frag_alloc_pbuf_custom_ref();</div>
<div class="line"><a name="l00793"></a><span class="lineno"> 793</span>  <span class="keywordflow">if</span> (pcr == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00794"></a><span class="lineno"> 794</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(rambuf);</div>
<div class="line"><a name="l00795"></a><span class="lineno"> 795</span>  <span class="keywordflow">goto</span> memerr;</div>
<div class="line"><a name="l00796"></a><span class="lineno"> 796</span>  }</div>
<div class="line"><a name="l00797"></a><span class="lineno"> 797</span>  <span class="comment">/* Mirror this pbuf, although we might not need all of it. */</span></div>
<div class="line"><a name="l00798"></a><span class="lineno"> 798</span>  newpbuf = pbuf_alloced_custom(<a class="code" href="group__pbuf.html#ggaee1baa59bb2f85ba575b5a8619ac1ebfa21116654fbab6d5a4dfeb87a1bb8f0ba">PBUF_RAW</a>, newpbuflen, <a class="code" href="group__pbuf.html#ggab7e0e32fcc292c0d7107721766ed92fbac9b6ba960fdea6f2e8f35c8313b77e4e">PBUF_REF</a>, &pcr->pc,</div>
<div class="line"><a name="l00799"></a><span class="lineno"> 799</span>  (<a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a>*)p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a> + poff, newpbuflen);</div>
<div class="line"><a name="l00800"></a><span class="lineno"> 800</span>  <span class="keywordflow">if</span> (newpbuf == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00801"></a><span class="lineno"> 801</span>  ip_frag_free_pbuf_custom_ref(pcr);</div>
<div class="line"><a name="l00802"></a><span class="lineno"> 802</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(rambuf);</div>
<div class="line"><a name="l00803"></a><span class="lineno"> 803</span>  <span class="keywordflow">goto</span> memerr;</div>
<div class="line"><a name="l00804"></a><span class="lineno"> 804</span>  }</div>
<div class="line"><a name="l00805"></a><span class="lineno"> 805</span>  <a class="code" href="group__pbuf.html#ga77f6bbd69e45e542014d9c547c7da74e">pbuf_ref</a>(p);</div>
<div class="line"><a name="l00806"></a><span class="lineno"> 806</span>  pcr->original = p;</div>
<div class="line"><a name="l00807"></a><span class="lineno"> 807</span>  pcr->pc.custom_free_function = ipfrag_free_pbuf_custom;</div>
<div class="line"><a name="l00808"></a><span class="lineno"> 808</span>  </div>
<div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  <span class="comment">/* Add it to end of rambuf's chain, but using pbuf_cat, not pbuf_chain</span></div>
<div class="line"><a name="l00810"></a><span class="lineno"> 810</span> <span class="comment"> * so that it is removed when pbuf_dechain is later called on rambuf.</span></div>
<div class="line"><a name="l00811"></a><span class="lineno"> 811</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00812"></a><span class="lineno"> 812</span>  <a class="code" href="group__pbuf.html#ga82429084fe29015509c9b4a072707cd4">pbuf_cat</a>(rambuf, newpbuf);</div>
<div class="line"><a name="l00813"></a><span class="lineno"> 813</span>  left_to_copy -= newpbuflen;</div>
<div class="line"><a name="l00814"></a><span class="lineno"> 814</span>  <span class="keywordflow">if</span> (left_to_copy) {</div>
<div class="line"><a name="l00815"></a><span class="lineno"> 815</span>  poff = 0;</div>
<div class="line"><a name="l00816"></a><span class="lineno"> 816</span>  p = p-><a class="code" href="structpbuf.html#a5e5763c94fd18d78937b0b58ce7df341">next</a>;</div>
<div class="line"><a name="l00817"></a><span class="lineno"> 817</span>  }</div>
<div class="line"><a name="l00818"></a><span class="lineno"> 818</span>  }</div>
<div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  poff += newpbuflen;</div>
<div class="line"><a name="l00820"></a><span class="lineno"> 820</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_NETIF_TX_SINGLE_PBUF */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00821"></a><span class="lineno"> 821</span>  </div>
<div class="line"><a name="l00822"></a><span class="lineno"> 822</span>  <span class="comment">/* Correct header */</span></div>
<div class="line"><a name="l00823"></a><span class="lineno"> 823</span>  last = (left <= <a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#aca7d56b4e0f822b0ced2885f222b8d48">mtu</a> - <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>);</div>
<div class="line"><a name="l00824"></a><span class="lineno"> 824</span>  </div>
<div class="line"><a name="l00825"></a><span class="lineno"> 825</span>  <span class="comment">/* Set new offset and MF flag */</span></div>
<div class="line"><a name="l00826"></a><span class="lineno"> 826</span>  tmp = (<a class="code" href="prot_2ip4_8h.html#ad059798b16d1f615b5af8770175121ba">IP_OFFMASK</a> & (ofo));</div>
<div class="line"><a name="l00827"></a><span class="lineno"> 827</span>  <span class="keywordflow">if</span> (!last) {</div>
<div class="line"><a name="l00828"></a><span class="lineno"> 828</span>  tmp = tmp | <a class="code" href="prot_2ip4_8h.html#ae8afe1e04bb9bad791443556c3b2cd73">IP_MF</a>;</div>
<div class="line"><a name="l00829"></a><span class="lineno"> 829</span>  }</div>
<div class="line"><a name="l00830"></a><span class="lineno"> 830</span>  <a class="code" href="prot_2ip4_8h.html#a4c2189e1400dca1c0f785de96ceda2b6">IPH_OFFSET_SET</a>(iphdr, <a class="code" href="def_8c.html#ad637280639de4066392e6b5614fa3e56">lwip_htons</a>(tmp));</div>
<div class="line"><a name="l00831"></a><span class="lineno"> 831</span>  <a class="code" href="prot_2ip4_8h.html#a069cb9b3765c4bdd63d13efb2df0206e">IPH_LEN_SET</a>(iphdr, <a class="code" href="def_8c.html#ad637280639de4066392e6b5614fa3e56">lwip_htons</a>(fragsize + <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>));</div>
<div class="line"><a name="l00832"></a><span class="lineno"> 832</span>  <a class="code" href="prot_2ip4_8h.html#aec30403fb98b013bd094688de55cdaef">IPH_CHKSUM_SET</a>(iphdr, 0);</div>
<div class="line"><a name="l00833"></a><span class="lineno"> 833</span> <span class="preprocessor">#if CHECKSUM_GEN_IP</span></div>
<div class="line"><a name="l00834"></a><span class="lineno"> 834</span>  <a class="code" href="netif_8h.html#ad968df1b35c2fae368e087966e3bc677">IF__NETIF_CHECKSUM_ENABLED</a>(<a class="code" href="structnetif.html">netif</a>, NETIF_CHECKSUM_GEN_IP) {</div>
<div class="line"><a name="l00835"></a><span class="lineno"> 835</span>  <a class="code" href="prot_2ip4_8h.html#aec30403fb98b013bd094688de55cdaef">IPH_CHKSUM_SET</a>(iphdr, <a class="code" href="inet__chksum_8h.html#a34f1aa1587562a09e11b704b51bab043">inet_chksum</a>(iphdr, <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>));</div>
<div class="line"><a name="l00836"></a><span class="lineno"> 836</span>  }</div>
<div class="line"><a name="l00837"></a><span class="lineno"> 837</span> <span class="preprocessor">#endif </span><span class="comment">/* CHECKSUM_GEN_IP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00838"></a><span class="lineno"> 838</span>  </div>
<div class="line"><a name="l00839"></a><span class="lineno"> 839</span>  <span class="comment">/* No need for separate header pbuf - we allowed room for it in rambuf</span></div>
<div class="line"><a name="l00840"></a><span class="lineno"> 840</span> <span class="comment"> * when allocated.</span></div>
<div class="line"><a name="l00841"></a><span class="lineno"> 841</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00842"></a><span class="lineno"> 842</span>  <a class="code" href="structnetif.html">netif</a>->output(<a class="code" href="structnetif.html">netif</a>, rambuf, dest);</div>
<div class="line"><a name="l00843"></a><span class="lineno"> 843</span>  <a class="code" href="stats_8h.html#a2eb4cc22608c8abe8595e90efd56ae81">IPFRAG_STATS_INC</a>(ip_frag.xmit);</div>
<div class="line"><a name="l00844"></a><span class="lineno"> 844</span>  </div>
<div class="line"><a name="l00845"></a><span class="lineno"> 845</span>  <span class="comment">/* Unfortunately we can't reuse rambuf - the hardware may still be</span></div>
<div class="line"><a name="l00846"></a><span class="lineno"> 846</span> <span class="comment"> * using the buffer. Instead we free it (and the ensuing chain) and</span></div>
<div class="line"><a name="l00847"></a><span class="lineno"> 847</span> <span class="comment"> * recreate it next time round the loop. If we're lucky the hardware</span></div>
<div class="line"><a name="l00848"></a><span class="lineno"> 848</span> <span class="comment"> * will have already sent the packet, the free will really free, and</span></div>
<div class="line"><a name="l00849"></a><span class="lineno"> 849</span> <span class="comment"> * there will be zero memory penalty.</span></div>
<div class="line"><a name="l00850"></a><span class="lineno"> 850</span> <span class="comment"> */</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>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(rambuf);</div>
<div class="line"><a name="l00853"></a><span class="lineno"> 853</span>  left -= fragsize;</div>
<div class="line"><a name="l00854"></a><span class="lineno"> 854</span>  ofo += nfb;</div>
<div class="line"><a name="l00855"></a><span class="lineno"> 855</span>  }</div>
<div class="line"><a name="l00856"></a><span class="lineno"> 856</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipfragoks);</div>
<div class="line"><a name="l00857"></a><span class="lineno"> 857</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</div>
<div class="line"><a name="l00858"></a><span class="lineno"> 858</span> memerr:</div>
<div class="line"><a name="l00859"></a><span class="lineno"> 859</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipfragfails);</div>
<div class="line"><a name="l00860"></a><span class="lineno"> 860</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaaaeafdbf3aecc46864daa3cd829c7e05">ERR_MEM</a>;</div>
<div class="line"><a name="l00861"></a><span class="lineno"> 861</span> }</div>
<div class="line"><a name="l00862"></a><span class="lineno"> 862</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_FRAG */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00863"></a><span class="lineno"> 863</span>  </div>
<div class="line"><a name="l00864"></a><span class="lineno"> 864</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_IPV4 */</span><span class="preprocessor"></span></div>
</div><!-- fragment --></div><!-- contents -->
</div><!-- doc-content -->
<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="adef_8h_html_ac642bf6057869696d7807564d8309ffc"><div class="ttname"><a href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a></div><div class="ttdeci">#define lwip_ntohs(x)</div><div class="ttdef"><b>Definition:</b> <a href="def_8h_source.html#l00076">def.h:76</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="adef_8h_html"><div class="ttname"><a href="def_8h.html">def.h</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_ggaee1baa59bb2f85ba575b5a8619ac1ebfa21116654fbab6d5a4dfeb87a1bb8f0ba"><div class="ttname"><a href="group__pbuf.html#ggaee1baa59bb2f85ba575b5a8619ac1ebfa21116654fbab6d5a4dfeb87a1bb8f0ba">PBUF_RAW</a></div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00094">pbuf.h:94</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="acc_8h_html_aab0b988124e37a978d9a88e7c1c778e0"><div class="ttname"><a href="cc_8h.html#aab0b988124e37a978d9a88e7c1c778e0">PACK_STRUCT_FIELD</a></div><div class="ttdeci">#define PACK_STRUCT_FIELD(x)</div><div class="ttdef"><b>Definition:</b> <a href="cc_8h_source.html#l00006">cc.h:6</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="acc_8h_html_a9ebc500530d0d9e6cd0b81969f48bbc8"><div class="ttname"><a href="cc_8h.html#a9ebc500530d0d9e6cd0b81969f48bbc8">PACK_STRUCT_STRUCT</a></div><div class="ttdeci">#define PACK_STRUCT_STRUCT</div><div class="ttdef"><b>Definition:</b> <a href="cc_8h_source.html#l00007">cc.h:7</a></div></div>
<div class="ttc" id="agroup__pbuf_html_ggaee1baa59bb2f85ba575b5a8619ac1ebfafcc1e506061ba69dfa142eb6b3da5f13"><div class="ttname"><a href="group__pbuf.html#ggaee1baa59bb2f85ba575b5a8619ac1ebfafcc1e506061ba69dfa142eb6b3da5f13">PBUF_IP</a></div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00080">pbuf.h:80</a></div></div>
<div class="ttc" id="aip4__frag_8h_html"><div class="ttname"><a href="ip4__frag_8h.html">ip4_frag.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="apbuf_8h_html_a5df7ac5ae59012fe9aeddba375a72190"><div class="ttname"><a href="pbuf_8h.html#a5df7ac5ae59012fe9aeddba375a72190">pbuf_clen</a></div><div class="ttdeci">u16_t pbuf_clen(const struct pbuf *p)</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8c_source.html#l00801">pbuf.c:801</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="astructnetif_html_aca7d56b4e0f822b0ced2885f222b8d48"><div class="ttname"><a href="structnetif.html#aca7d56b4e0f822b0ced2885f222b8d48">netif::mtu</a></div><div class="ttdeci">u16_t mtu</div><div class="ttdef"><b>Definition:</b> <a href="netif_8h_source.html#l00307">netif.h:307</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="adef_8h_html_a748f5df614a3fc989e8900fd229d6e4e"><div class="ttname"><a href="def_8h.html#a748f5df614a3fc989e8900fd229d6e4e">LWIP_MIN</a></div><div class="ttdeci">#define LWIP_MIN(x, y)</div><div class="ttdef"><b>Definition:</b> <a href="def_8h_source.html#l00055">def.h:55</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="aprot_2ip4_8h_html_ad76777d4d34f33ab5f715f9ca15503c3"><div class="ttname"><a href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a></div><div class="ttdeci">#define IP_HLEN</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00064">ip4.h:64</a></div></div>
<div class="ttc" id="anetif_8h_html_ad968df1b35c2fae368e087966e3bc677"><div class="ttname"><a href="netif_8h.html#ad968df1b35c2fae368e087966e3bc677">IF__NETIF_CHECKSUM_ENABLED</a></div><div class="ttdeci">#define IF__NETIF_CHECKSUM_ENABLED(netif, chksumflag)</div><div class="ttdef"><b>Definition:</b> <a href="netif_8h_source.html#l00357">netif.h:357</a></div></div>
<div class="ttc" id="aicmp_8h_html"><div class="ttname"><a href="icmp_8h.html">icmp.h</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="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__pbuf_html_gac2f1f58fd36042e82af46f5015720899"><div class="ttname"><a href="group__pbuf.html#gac2f1f58fd36042e82af46f5015720899">pbuf_copy_partial</a></div><div class="ttdeci">u16_t pbuf_copy_partial(const struct pbuf *p, void *dataptr, u16_t len, u16_t offset)</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8c_source.html#l01016">pbuf.c:1016</a></div></div>
<div class="ttc" id="aprot_2ip4_8h_html_a7c60caeb708571a07a44309c10ec3a01"><div class="ttname"><a href="prot_2ip4_8h.html#a7c60caeb708571a07a44309c10ec3a01">IPH_HL</a></div><div class="ttdeci">#define IPH_HL(hdr)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00103">ip4.h:103</a></div></div>
<div class="ttc" id="anetif_8h_html"><div class="ttname"><a href="netif_8h.html">netif.h</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_2ip4_8h_html_ad059798b16d1f615b5af8770175121ba"><div class="ttname"><a href="prot_2ip4_8h.html#ad059798b16d1f615b5af8770175121ba">IP_OFFMASK</a></div><div class="ttdeci">#define IP_OFFMASK</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00085">ip4.h:85</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_ad41122bd0b5485a18a4415c8f953727b"><div class="ttname"><a href="lwipopts_8h.html#ad41122bd0b5485a18a4415c8f953727b">IP_REASS_MAXAGE</a></div><div class="ttdeci">#define IP_REASS_MAXAGE</div><div class="ttdef"><b>Definition:</b> <a href="lwipopts_8h_source.html#l00119">lwipopts.h:119</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="acc_8h_html_a73199061891adf1b912d20835c7d5e96"><div class="ttname"><a href="cc_8h.html#a73199061891adf1b912d20835c7d5e96">PACK_STRUCT_BEGIN</a></div><div class="ttdeci">#define PACK_STRUCT_BEGIN</div><div class="ttdef"><b>Definition:</b> <a href="cc_8h_source.html#l00008">cc.h:8</a></div></div>
<div class="ttc" id="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="astats_8h_html_a2eb4cc22608c8abe8595e90efd56ae81"><div class="ttname"><a href="stats_8h.html#a2eb4cc22608c8abe8595e90efd56ae81">IPFRAG_STATS_INC</a></div><div class="ttdeci">#define IPFRAG_STATS_INC(x)</div><div class="ttdef"><b>Definition:</b> <a href="stats_8h_source.html#l00368">stats.h:368</a></div></div>
<div class="ttc" id="astats_8h_html_a237a8f1e47af42fb612e936e928a9ced"><div class="ttname"><a href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a></div><div class="ttdeci">#define MIB2_STATS_INC(x)</div><div class="ttdef"><b>Definition:</b> <a href="stats_8h_source.html#l00467">stats.h:467</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="aprot_2ip4_8h_html_a069cb9b3765c4bdd63d13efb2df0206e"><div class="ttname"><a href="prot_2ip4_8h.html#a069cb9b3765c4bdd63d13efb2df0206e">IPH_LEN_SET</a></div><div class="ttdeci">#define IPH_LEN_SET(hdr, len)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00115">ip4.h:115</a></div></div>
<div class="ttc" id="aprot_2ip4_8h_html_ae8afe1e04bb9bad791443556c3b2cd73"><div class="ttname"><a href="prot_2ip4_8h.html#ae8afe1e04bb9bad791443556c3b2cd73">IP_MF</a></div><div class="ttdeci">#define IP_MF</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00084">ip4.h:84</a></div></div>
<div class="ttc" id="aprot_2ip4_8h_html_ae79eaecc0bf9e4dbb9e47ea56ad2157a"><div class="ttname"><a href="prot_2ip4_8h.html#ae79eaecc0bf9e4dbb9e47ea56ad2157a">IPH_ID</a></div><div class="ttdeci">#define IPH_ID(hdr)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00106">ip4.h:106</a></div></div>
<div class="ttc" id="aip_8h_html_ae214afa9d3f1b26fc8d538436b8fa3c4"><div class="ttname"><a href="ip_8h.html#ae214afa9d3f1b26fc8d538436b8fa3c4">ip_current_input_netif</a></div><div class="ttdeci">#define ip_current_input_netif()</div><div class="ttdef"><b>Definition:</b> <a href="ip_8h_source.html#l00137">ip.h:137</a></div></div>
<div class="ttc" id="alwipopts_8h_html_a4cdc3e9a4a1c01d1f7f0e723a1b2ec33"><div class="ttname"><a href="lwipopts_8h.html#a4cdc3e9a4a1c01d1f7f0e723a1b2ec33">IP_REASS_DEBUG</a></div><div class="ttdeci">#define IP_REASS_DEBUG</div><div class="ttdef"><b>Definition:</b> <a href="lwipopts_8h_source.html#l00451">lwipopts.h:451</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="adef_8h_html_a7d17b88eabf7766c0bfa89d8f965f67e"><div class="ttname"><a href="def_8h.html#a7d17b88eabf7766c0bfa89d8f965f67e">PP_NTOHS</a></div><div class="ttdeci">#define PP_NTOHS(x)</div><div class="ttdef"><b>Definition:</b> <a href="def_8h_source.html#l00080">def.h:80</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_ga82429084fe29015509c9b4a072707cd4"><div class="ttname"><a href="group__pbuf.html#ga82429084fe29015509c9b4a072707cd4">pbuf_cat</a></div><div class="ttdeci">void pbuf_cat(struct pbuf *head, struct pbuf *tail)</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8c_source.html#l00841">pbuf.c:841</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="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="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="aprot_2ip4_8h_html_aec30403fb98b013bd094688de55cdaef"><div class="ttname"><a href="prot_2ip4_8h.html#aec30403fb98b013bd094688de55cdaef">IPH_CHKSUM_SET</a></div><div class="ttdeci">#define IPH_CHKSUM_SET(hdr, chksum)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00120">ip4.h:120</a></div></div>
<div class="ttc" id="aprot_2ip4_8h_html_a559dce3878f1d6a46bcb4cb312962397"><div class="ttname"><a href="prot_2ip4_8h.html#a559dce3878f1d6a46bcb4cb312962397">IPH_OFFSET</a></div><div class="ttdeci">#define IPH_OFFSET(hdr)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00107">ip4.h:107</a></div></div>
<div class="ttc" id="aicmp_8h_html_a058d0a0769bd38db99fc6fd1dad1324aa4d351874c3e2d4a4cf46569df28cd796"><div class="ttname"><a href="icmp_8h.html#a058d0a0769bd38db99fc6fd1dad1324aa4d351874c3e2d4a4cf46569df28cd796">ICMP_TE_FRAG</a></div><div class="ttdef"><b>Definition:</b> <a href="icmp_8h_source.html#l00075">icmp.h:75</a></div></div>
<div class="ttc" id="ainet__chksum_8h_html_a34f1aa1587562a09e11b704b51bab043"><div class="ttname"><a href="inet__chksum_8h.html#a34f1aa1587562a09e11b704b51bab043">inet_chksum</a></div><div class="ttdeci">u16_t inet_chksum(const void *dataptr, u16_t len)</div><div class="ttdef"><b>Definition:</b> <a href="inet__chksum_8c_source.html#l00555">inet_chksum.c:555</a></div></div>
<div class="ttc" id="astring_8h_html_ace4b911463887af5e748326323e99a23"><div class="ttname"><a href="string_8h.html#ace4b911463887af5e748326323e99a23">memset</a></div><div class="ttdeci">void * memset(void *dst, int c, size_t length)</div></div>
<div class="ttc" id="aprot_2ip4_8h_html_aec0328fe4711b8c1ef4dd6709e4fd6d5"><div class="ttname"><a href="prot_2ip4_8h.html#aec0328fe4711b8c1ef4dd6709e4fd6d5">IPH_LEN</a></div><div class="ttdeci">#define IPH_LEN(hdr)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00105">ip4.h:105</a></div></div>
<div class="ttc" id="alwipopts_8h_html_a29084a46d7d4be30e8029d356bca0394"><div class="ttname"><a href="lwipopts_8h.html#a29084a46d7d4be30e8029d356bca0394">IP_REASS_MAX_PBUFS</a></div><div class="ttdeci">#define IP_REASS_MAX_PBUFS</div><div class="ttdef"><b>Definition:</b> <a href="lwipopts_8h_source.html#l00121">lwipopts.h:121</a></div></div>
<div class="ttc" id="alwipopts_8h_html_a8c6e3c1e4f74acb16376188dbf8909ec"><div class="ttname"><a href="lwipopts_8h.html#a8c6e3c1e4f74acb16376188dbf8909ec">SMEMCPY</a></div><div class="ttdeci">#define SMEMCPY(dst, src, len)</div><div class="ttdef"><b>Definition:</b> <a href="lwipopts_8h_source.html#l00044">lwipopts.h:44</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="aprot_2ip4_8h_html_a4c2189e1400dca1c0f785de96ceda2b6"><div class="ttname"><a href="prot_2ip4_8h.html#a4c2189e1400dca1c0f785de96ceda2b6">IPH_OFFSET_SET</a></div><div class="ttdeci">#define IPH_OFFSET_SET(hdr, off)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00117">ip4.h:117</a></div></div>
<div class="ttc" id="ainet__chksum_8h_html"><div class="ttname"><a href="inet__chksum_8h.html">inet_chksum.h</a></div></div>
<div class="ttc" id="apbuf_8h_html_aaa17c1951cf2d207b6adfd3947d91f00"><div class="ttname"><a href="pbuf_8h.html#aaa17c1951cf2d207b6adfd3947d91f00">pbuf_header</a></div><div class="ttdeci">u8_t pbuf_header(struct pbuf *p, s16_t header_size)</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8c_source.html#l00665">pbuf.c:665</a></div></div>
<div class="ttc" id="agroup__pbuf_html_ggab7e0e32fcc292c0d7107721766ed92fbac9b6ba960fdea6f2e8f35c8313b77e4e"><div class="ttname"><a href="group__pbuf.html#ggab7e0e32fcc292c0d7107721766ed92fbac9b6ba960fdea6f2e8f35c8313b77e4e">PBUF_REF</a></div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00116">pbuf.h:116</a></div></div>
<div class="ttc" id="astructpbuf_html_a8d32dc3e964369d4eec638fc37fbc460"><div class="ttname"><a href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">pbuf::payload</a></div><div class="ttdeci">void * payload</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00147">pbuf.h:147</a></div></div>
<div class="ttc" id="acc_8h_html_a465fef70f294e21cbf4ea51fc342f20e"><div class="ttname"><a href="cc_8h.html#a465fef70f294e21cbf4ea51fc342f20e">PACK_STRUCT_END</a></div><div class="ttdeci">#define PACK_STRUCT_END</div><div class="ttdef"><b>Definition:</b> <a href="cc_8h_source.html#l00009">cc.h:9</a></div></div>
<div class="ttc" id="afat__string_8h_html_a070d2ce7b6bb7e5c05602aa8c308d0c4"><div class="ttname"><a href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a></div><div class="ttdeci">#define NULL</div><div class="ttdef"><b>Definition:</b> <a href="fat__string_8h_source.html#l00017">fat_string.h:17</a></div></div>
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