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<div class="title">ip4.c</div> </div>
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<div class="contents">
<a href="ip4_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="l00009"></a><span class="lineno"> 9</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * Copyright (c) 2001-2004 Swedish Institute of Computer Science.</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without modification,</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * are permitted provided that the following conditions are met:</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * 1. Redistributions of source code must retain 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.</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright notice,</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * this list of conditions and the following disclaimer in the documentation</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * and/or other materials provided with the distribution.</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</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="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * derived from this software without specific prior written permission.</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</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="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</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="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * OF SUCH DAMAGE.</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"> * This file is part of the lwIP TCP/IP stack.</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> * Author: 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="ip_8h.html">net/ip.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="mem_8h.html">net/mem.h</a>"</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</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="l00049"></a><span class="lineno"> 49</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="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#include "<a class="code" href="netif_8h.html">net/netif.h</a>"</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#include "<a class="code" href="icmp_8h.html">net/icmp.h</a>"</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#include "<a class="code" href="igmp_8h.html">net/igmp.h</a>"</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#include "<a class="code" href="raw_8h.html">net/raw.h</a>"</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#include "<a class="code" href="udp_8h.html">net/udp.h</a>"</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor">#include "<a class="code" href="tcp__priv_8h.html">net/priv/tcp_priv.h</a>"</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#include "<a class="code" href="autoip_8h.html">net/autoip.h</a>"</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#include "<a class="code" href="stats_8h.html">net/stats.h</a>"</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor">#include "<a class="code" href="prot_2dhcp_8h.html">net/prot/dhcp.h</a>"</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  </div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor">#include <<a class="code" href="string_8h.html">string.h</a>></span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  </div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor">#ifdef LWIP_HOOK_FILENAME</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#include LWIP_HOOK_FILENAME</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  </div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#ifndef LWIP_INLINE_IP_CHKSUM</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">#if LWIP_CHECKSUM_CTRL_PER_NETIF</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#define LWIP_INLINE_IP_CHKSUM 0</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor">#else </span><span class="comment">/* LWIP_CHECKSUM_CTRL_PER_NETIF */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor">#define LWIP_INLINE_IP_CHKSUM 1</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_CHECKSUM_CTRL_PER_NETIF */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  </div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="preprocessor">#if LWIP_INLINE_IP_CHKSUM && CHECKSUM_GEN_IP</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor">#define CHECKSUM_GEN_IP_INLINE 1</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="preprocessor">#define CHECKSUM_GEN_IP_INLINE 0</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="preprocessor">#endif</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">#if LWIP_DHCP || defined(LWIP_IP_ACCEPT_UDP_PORT)</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor">#define IP_ACCEPT_LINK_LAYER_ADDRESSING 1</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  </div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="preprocessor">#if LWIP_DHCP && defined(LWIP_IP_ACCEPT_UDP_PORT)</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment">/* accept DHCP client port and custom port */</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="preprocessor">#define IP_ACCEPT_LINK_LAYER_ADDRESSED_PORT(port) (((port) == PP_NTOHS(DHCP_CLIENT_PORT)) \</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="preprocessor"> || (LWIP_IP_ACCEPT_UDP_PORT(port)))</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="preprocessor">#elif defined(LWIP_IP_ACCEPT_UDP_PORT) </span><span class="comment">/* LWIP_DHCP && defined(LWIP_IP_ACCEPT_UDP_PORT) */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment">/* accept custom port only */</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="preprocessor">#define IP_ACCEPT_LINK_LAYER_ADDRESSED_PORT(port) (LWIP_IP_ACCEPT_UDP_PORT(port))</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="preprocessor">#else </span><span class="comment">/* LWIP_DHCP && defined(LWIP_IP_ACCEPT_UDP_PORT) */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment">/* accept DHCP client port only */</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="preprocessor">#define IP_ACCEPT_LINK_LAYER_ADDRESSED_PORT(port) ((port) == PP_NTOHS(DHCP_CLIENT_PORT))</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_DHCP && defined(LWIP_IP_ACCEPT_UDP_PORT) */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  </div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="preprocessor">#else </span><span class="comment">/* LWIP_DHCP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="preprocessor">#define IP_ACCEPT_LINK_LAYER_ADDRESSING 0</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_DHCP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  </div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="keyword">static</span> <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> ip_id;</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  </div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="preprocessor">#if LWIP_MULTICAST_TX_OPTIONS</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  </div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structnetif.html">netif</a>* ip4_default_multicast_netif;</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  </div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> ip4_set_default_multicast_netif(<span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a>* default_multicast_netif)</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> {</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  ip4_default_multicast_netif = default_multicast_netif;</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> }</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_MULTICAST_TX_OPTIONS */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  </div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="preprocessor">#ifdef LWIP_HOOK_IP4_ROUTE_SRC</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  </div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="keyword">struct </span><a class="code" href="structnetif.html">netif</a> *</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> ip4_route_src(<span class="keyword">const</span> ip4_addr_t *dest, <span class="keyword">const</span> ip4_addr_t *src)</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> {</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">if</span> (src != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="comment">/* when src==NULL, the hook is called from ip4_route(dest) */</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keyword">struct </span><a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a> = LWIP_HOOK_IP4_ROUTE_SRC(dest, src);</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordflow">if</span> (<a class="code" href="structnetif.html">netif</a> != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">return</span> <a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  }</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">return</span> ip4_route(dest);</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> }</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_HOOK_IP4_ROUTE_SRC */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  </div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="keyword">struct </span><a class="code" href="structnetif.html">netif</a> *</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> ip4_route(<span class="keyword">const</span> ip4_addr_t *dest)</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> {</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keyword">struct </span><a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  </div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="preprocessor">#if LWIP_MULTICAST_TX_OPTIONS</span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="comment">/* Use administratively selected interface for multicast by default */</span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordflow">if</span> (ip4_addr_ismulticast(dest) && ip4_default_multicast_netif) {</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keywordflow">return</span> ip4_default_multicast_netif;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  }</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_MULTICAST_TX_OPTIONS */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  </div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="comment">/* iterate through netifs */</span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">for</span> (<a class="code" href="structnetif.html">netif</a> = <a class="code" href="netif_8h.html#a1c8141eaa98f6dc6dfddbb23a706656c">netif_list</a>; <a class="code" href="structnetif.html">netif</a> != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>; <a class="code" href="structnetif.html">netif</a> = <a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#ae77736b64df442242795220d76be6b86">next</a>) {</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="comment">/* is the netif up, does it have a link and a valid address? */</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">if</span> (<a class="code" href="group__netif.html#ga94a4c24c988afc0a577387730f303b19">netif_is_up</a>(<a class="code" href="structnetif.html">netif</a>) && <a class="code" href="netif_8h.html#a780be4c3fa9f7f2534f7865666c3a1b8">netif_is_link_up</a>(<a class="code" href="structnetif.html">netif</a>) && !ip4_addr_isany_val(*netif_ip4_addr(<a class="code" href="structnetif.html">netif</a>))) {</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="comment">/* network mask matches? */</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">if</span> (ip4_addr_netcmp(dest, netif_ip4_addr(<a class="code" href="structnetif.html">netif</a>), netif_ip4_netmask(<a class="code" href="structnetif.html">netif</a>))) {</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="comment">/* return netif on which to forward IP packet */</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">return</span> <a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  }</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="comment">/* gateway matches on a non broadcast interface? (i.e. peer in a point to point interface) */</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">if</span> (((<a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#a1c171db6097bbb6f09f63549a66e00ea">flags</a> & <a class="code" href="group__netif__flags.html#gaef64fe15c82bc7b235366923e517104e">NETIF_FLAG_BROADCAST</a>) == 0) && ip4_addr_cmp(dest, netif_ip4_gw(<a class="code" href="structnetif.html">netif</a>))) {</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="comment">/* return netif on which to forward IP packet */</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">return</span> <a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  }</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  }</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  }</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  </div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="preprocessor">#if LWIP_NETIF_LOOPBACK && !LWIP_HAVE_LOOPIF</span></div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="comment">/* loopif is disabled, looopback traffic is passed through any netif */</span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordflow">if</span> (ip4_addr_isloopback(dest)) {</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="comment">/* don't check for link on loopback traffic */</span></div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordflow">if</span> (<a class="code" href="netif_8h.html#a3d0925cbce550ed461907aee816713ba">netif_default</a> != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a> && <a class="code" href="group__netif.html#ga94a4c24c988afc0a577387730f303b19">netif_is_up</a>(<a class="code" href="netif_8h.html#a3d0925cbce550ed461907aee816713ba">netif_default</a>)) {</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordflow">return</span> <a class="code" href="netif_8h.html#a3d0925cbce550ed461907aee816713ba">netif_default</a>;</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  }</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="comment">/* default netif is not up, just use any netif for loopback traffic */</span></div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keywordflow">for</span> (<a class="code" href="structnetif.html">netif</a> = <a class="code" href="netif_8h.html#a1c8141eaa98f6dc6dfddbb23a706656c">netif_list</a>; <a class="code" href="structnetif.html">netif</a> != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>; <a class="code" href="structnetif.html">netif</a> = <a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#ae77736b64df442242795220d76be6b86">next</a>) {</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordflow">if</span> (<a class="code" href="group__netif.html#ga94a4c24c988afc0a577387730f303b19">netif_is_up</a>(<a class="code" href="structnetif.html">netif</a>)) {</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordflow">return</span> <a class="code" href="structnetif.html">netif</a>;</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>  }</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keywordflow">return</span> <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  }</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_NETIF_LOOPBACK && !LWIP_HAVE_LOOPIF */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  </div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="preprocessor">#ifdef LWIP_HOOK_IP4_ROUTE_SRC</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <a class="code" href="structnetif.html">netif</a> = LWIP_HOOK_IP4_ROUTE_SRC(dest, <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordflow">if</span> (<a class="code" href="structnetif.html">netif</a> != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">return</span> <a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  }</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="preprocessor">#elif defined(LWIP_HOOK_IP4_ROUTE)</span></div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <a class="code" href="structnetif.html">netif</a> = LWIP_HOOK_IP4_ROUTE(dest);</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordflow">if</span> (<a class="code" href="structnetif.html">netif</a> != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">return</span> <a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  }</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  </div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordflow">if</span> ((<a class="code" href="netif_8h.html#a3d0925cbce550ed461907aee816713ba">netif_default</a> == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) || !<a class="code" href="group__netif.html#ga94a4c24c988afc0a577387730f303b19">netif_is_up</a>(<a class="code" href="netif_8h.html#a3d0925cbce550ed461907aee816713ba">netif_default</a>) || !<a class="code" href="netif_8h.html#a780be4c3fa9f7f2534f7865666c3a1b8">netif_is_link_up</a>(<a class="code" href="netif_8h.html#a3d0925cbce550ed461907aee816713ba">netif_default</a>) ||</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  ip4_addr_isany_val(*netif_ip4_addr(<a class="code" href="netif_8h.html#a3d0925cbce550ed461907aee816713ba">netif_default</a>))) {</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="comment">/* No matching netif found and default netif is not usable.</span></div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span> <span class="comment"> If this is not good enough for you, use LWIP_HOOK_IP4_ROUTE() */</span></div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a>, (<span class="stringliteral">"ip4_route: No route to %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"\n"</span>,</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  ip4_addr1_16(dest), ip4_addr2_16(dest), ip4_addr3_16(dest), ip4_addr4_16(dest)));</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.rterr);</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipoutnoroutes);</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">return</span> <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  }</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  </div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordflow">return</span> <a class="code" href="netif_8h.html#a3d0925cbce550ed461907aee816713ba">netif_default</a>;</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span> }</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  </div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="preprocessor">#if IP_FORWARD</span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  </div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="keyword">static</span> <span class="keywordtype">int</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> ip4_canforward(<span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *p)</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> {</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <a class="code" href="group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a> addr = <a class="code" href="def_8c.html#a14f94347a5b9b9e3602705b75b7ae524">lwip_htonl</a>(ip4_addr_get_u32(ip4_current_dest_addr()));</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="keywordflow">if</span> (p-><a class="code" href="structpbuf.html#aa4d1af2cab3d9280d29212095b5b872a">flags</a> & <a class="code" href="pbuf_8h.html#a6772c16662bbb78597399add086500c0">PBUF_FLAG_LLBCAST</a>) {</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="comment">/* don't route link-layer broadcasts */</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  }</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordflow">if</span> ((p-><a class="code" href="structpbuf.html#aa4d1af2cab3d9280d29212095b5b872a">flags</a> & <a class="code" href="pbuf_8h.html#ac0d56cde47aca24ef410d730d7c89887">PBUF_FLAG_LLMCAST</a>) && !IP_MULTICAST(addr)) {</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="comment">/* don't route link-layer multicasts unless the destination address is an IP</span></div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="comment"> multicast address */</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  }</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordflow">if</span> (IP_EXPERIMENTAL(addr)) {</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  }</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="keywordflow">if</span> (IP_CLASSA(addr)) {</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <a class="code" href="group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a> <a class="code" href="structnet.html">net</a> = addr & IP_CLASSA_NET;</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="keywordflow">if</span> ((<a class="code" href="structnet.html">net</a> == 0) || (<a class="code" href="structnet.html">net</a> == ((<a class="code" href="group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a>)IP_LOOPBACKNET << IP_CLASSA_NSHIFT))) {</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="comment">/* don't route loopback packets */</span></div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  }</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  }</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keywordflow">return</span> 1;</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>  </div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> ip4_forward(<span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *p, <span class="keyword">struct</span> <a class="code" href="structip__hdr.html">ip_hdr</a> *iphdr, <span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *inp)</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> {</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keyword">struct </span><a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  </div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <a class="code" href="perf_8h.html#aa1d6977095e51331f65dcfb2b076da52">PERF_START</a>;</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <a class="code" href="group__compiler__abstraction.html#ga70624a5deb8b9199406372a7f3603ecf">LWIP_UNUSED_ARG</a>(inp);</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  </div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="keywordflow">if</span> (!ip4_canforward(p)) {</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordflow">goto</span> return_noroute;</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  }</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  </div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="comment">/* RFC3927 2.7: do not forward link-local addresses */</span></div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keywordflow">if</span> (ip4_addr_islinklocal(ip4_current_dest_addr())) {</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"ip4_forward: not forwarding LLA %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"\n"</span>,</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  ip4_addr1_16(ip4_current_dest_addr()), ip4_addr2_16(ip4_current_dest_addr()),</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  ip4_addr3_16(ip4_current_dest_addr()), ip4_addr4_16(ip4_current_dest_addr())));</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">goto</span> return_noroute;</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  }</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  </div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="comment">/* Find network interface where to forward this IP packet to. */</span></div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <a class="code" href="structnetif.html">netif</a> = ip4_route_src(ip4_current_dest_addr(), ip4_current_src_addr());</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="keywordflow">if</span> (<a class="code" href="structnetif.html">netif</a> == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"ip4_forward: no forwarding route for %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" found\n"</span>,</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  ip4_addr1_16(ip4_current_dest_addr()), ip4_addr2_16(ip4_current_dest_addr()),</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  ip4_addr3_16(ip4_current_dest_addr()), ip4_addr4_16(ip4_current_dest_addr())));</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="comment">/* @todo: send ICMP_DUR_NET? */</span></div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keywordflow">goto</span> return_noroute;</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  }</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="preprocessor">#if !IP_FORWARD_ALLOW_TX_ON_RX_NETIF</span></div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="comment">/* Do not forward packets onto the same network interface on which</span></div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span> <span class="comment"> * they arrived. */</span></div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keywordflow">if</span> (<a class="code" href="structnetif.html">netif</a> == inp) {</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"ip4_forward: not bouncing packets back on incoming interface.\n"</span>));</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="keywordflow">goto</span> return_noroute;</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="preprocessor">#endif </span><span class="comment">/* IP_FORWARD_ALLOW_TX_ON_RX_NETIF */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  </div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="comment">/* decrement TTL */</span></div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <a class="code" href="prot_2ip4_8h.html#aa0e49f03bd4c3144e3548a0db72d1deb">IPH_TTL_SET</a>(iphdr, <a class="code" href="prot_2ip4_8h.html#a0d8238411ce35a007170f652e62209b3">IPH_TTL</a>(iphdr) - 1);</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="comment">/* send ICMP if TTL == 0 */</span></div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordflow">if</span> (<a class="code" href="prot_2ip4_8h.html#a0d8238411ce35a007170f652e62209b3">IPH_TTL</a>(iphdr) == 0) {</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipinhdrerrors);</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> <span class="preprocessor">#if LWIP_ICMP</span></div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="comment">/* Don't send ICMP messages in response to ICMP messages */</span></div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="keywordflow">if</span> (<a class="code" href="prot_2ip4_8h.html#aa2de6f9d35337b4be67d799805665e11">IPH_PROTO</a>(iphdr) != <a class="code" href="prot_2ip_8h.html#aacaea7b8c4c8a5229c02b653766b4793">IP_PROTO_ICMP</a>) {</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  icmp_time_exceeded(p, <a class="code" href="icmp_8h.html#a058d0a0769bd38db99fc6fd1dad1324aa827a1f8705826a6cc3c22e2571acf02c">ICMP_TE_TTL</a>);</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  }</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_ICMP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  }</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  </div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="comment">/* Incrementally update the IP checksum. */</span></div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keywordflow">if</span> (<a class="code" href="prot_2ip4_8h.html#a773b96f54c75b35bcd24e7f857fcf988">IPH_CHKSUM</a>(iphdr) >= <a class="code" href="def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a>(0xffffU - 0x100)) {</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <a class="code" href="prot_2ip4_8h.html#aec30403fb98b013bd094688de55cdaef">IPH_CHKSUM_SET</a>(iphdr, <a class="code" href="prot_2ip4_8h.html#a773b96f54c75b35bcd24e7f857fcf988">IPH_CHKSUM</a>(iphdr) + <a class="code" href="def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a>(0x100) + 1);</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <a class="code" href="prot_2ip4_8h.html#aec30403fb98b013bd094688de55cdaef">IPH_CHKSUM_SET</a>(iphdr, <a class="code" href="prot_2ip4_8h.html#a773b96f54c75b35bcd24e7f857fcf988">IPH_CHKSUM</a>(iphdr) + <a class="code" href="def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a>(0x100));</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  }</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  </div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"ip4_forward: forwarding packet to %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"\n"</span>,</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  ip4_addr1_16(ip4_current_dest_addr()), ip4_addr2_16(ip4_current_dest_addr()),</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  ip4_addr3_16(ip4_current_dest_addr()), ip4_addr4_16(ip4_current_dest_addr())));</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  </div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.fw);</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipforwdatagrams);</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.xmit);</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  </div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  <a class="code" href="perf_8h.html#a8ac3afe5d720793a229fbf70a78eb82f">PERF_STOP</a>(<span class="stringliteral">"ip4_forward"</span>);</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="comment">/* don't fragment if interface has mtu set to 0 [loopif] */</span></div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordflow">if</span> (<a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#aca7d56b4e0f822b0ced2885f222b8d48">mtu</a> && (p-><a class="code" href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a> > <a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#aca7d56b4e0f822b0ced2885f222b8d48">mtu</a>)) {</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  <span class="keywordflow">if</span> ((<a class="code" href="prot_2ip4_8h.html#a559dce3878f1d6a46bcb4cb312962397">IPH_OFFSET</a>(iphdr) & <a class="code" href="def_8h.html#a7d17b88eabf7766c0bfa89d8f965f67e">PP_NTOHS</a>(<a class="code" href="prot_2ip4_8h.html#ae2473f4a88d141d5298f92a4335b714a">IP_DF</a>)) == 0) {</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> <span class="preprocessor">#if IP_FRAG</span></div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  ip4_frag(p, <a class="code" href="structnetif.html">netif</a>, ip4_current_dest_addr());</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span> <span class="preprocessor">#else </span><span class="comment">/* IP_FRAG */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="comment">/* @todo: send ICMP Destination Unreachable code 13 "Communication administratively prohibited"? */</span></div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_FRAG */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span> <span class="preprocessor">#if LWIP_ICMP</span></div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="comment">/* send ICMP Destination Unreachable code 4: "Fragmentation Needed and DF Set" */</span></div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  icmp_dest_unreach(p, <a class="code" href="icmp_8h.html#a17637465f209385e5d19ef47fd9266a5a8be2bc49d42aa1a6ee1da93a8700ef5f">ICMP_DUR_FRAG</a>);</div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_ICMP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  }</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  }</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="comment">/* transmit pbuf on chosen interface */</span></div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  <a class="code" href="structnetif.html">netif</a>->output(<a class="code" href="structnetif.html">netif</a>, p, ip4_current_dest_addr());</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> return_noroute:</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipoutnoroutes);</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="preprocessor">#endif </span><span class="comment">/* IP_FORWARD */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  </div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span> ip4_input(<span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *p, <span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *inp)</div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span> {</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  <span class="keyword">struct </span><a class="code" href="structip__hdr.html">ip_hdr</a> *iphdr;</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keyword">struct </span><a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> iphdr_hlen;</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> iphdr_len;</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span> <span class="preprocessor">#if IP_ACCEPT_LINK_LAYER_ADDRESSING || LWIP_IGMP</span></div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <span class="keywordtype">int</span> check_ip_src = 1;</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_ACCEPT_LINK_LAYER_ADDRESSING || LWIP_IGMP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  </div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.recv);</div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipinreceives);</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  </div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  <span class="comment">/* identify the IP header */</span></div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  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="l00389"></a><span class="lineno"> 389</span>  if (<a class="code" href="prot_2ip4_8h.html#a05a9e8ecf4eff38244b4c13c7e70094c">IPH_V</a>(iphdr) != 4) {</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga77c491e468bf7d9a1bc48430c1866a96">LWIP_DBG_LEVEL_WARNING</a>, (<span class="stringliteral">"IP packet dropped due to bad version number %"</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>)<a class="code" href="prot_2ip4_8h.html#a05a9e8ecf4eff38244b4c13c7e70094c">IPH_V</a>(iphdr)));</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  ip4_debug_print(p);</div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.err);</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.drop);</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipinhdrerrors);</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</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>  </div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span> <span class="preprocessor">#ifdef LWIP_HOOK_IP4_INPUT</span></div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="keywordflow">if</span> (LWIP_HOOK_IP4_INPUT(p, inp)) {</div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  <span class="comment">/* the packet has been eaten */</span></div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  }</div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  </div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  <span class="comment">/* obtain IP header length in number of 32-bit words */</span></div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  iphdr_hlen = <a class="code" href="prot_2ip4_8h.html#a7c60caeb708571a07a44309c10ec3a01">IPH_HL</a>(iphdr);</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="comment">/* calculate IP header length in bytes */</span></div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  iphdr_hlen *= 4;</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  <span class="comment">/* obtain ip length in bytes */</span></div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  iphdr_len = <a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#aec0328fe4711b8c1ef4dd6709e4fd6d5">IPH_LEN</a>(iphdr));</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  </div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="comment">/* Trim pbuf. This is especially required for packets < 60 bytes. */</span></div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  <span class="keywordflow">if</span> (iphdr_len < p->tot_len) {</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <a class="code" href="group__pbuf.html#ga50abfe830a33a1a47a562febee66015d">pbuf_realloc</a>(p, iphdr_len);</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>  </div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="comment">/* header length exceeds first pbuf length, or ip length exceeds total pbuf length? */</span></div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <span class="keywordflow">if</span> ((iphdr_hlen > p-><a class="code" href="structpbuf.html#a6f82449625e36e294f5d210268c0703f">len</a>) || (iphdr_len > p-><a class="code" href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a>) || (iphdr_hlen < <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>)) {</div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  <span class="keywordflow">if</span> (iphdr_hlen < <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>) {</div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a>,</div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  (<span class="stringliteral">"ip4_input: short IP header (%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" bytes) received, IP packet dropped\n"</span>, iphdr_hlen));</div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  }</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  <span class="keywordflow">if</span> (iphdr_hlen > p-><a class="code" href="structpbuf.html#a6f82449625e36e294f5d210268c0703f">len</a>) {</div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a>,</div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  (<span class="stringliteral">"IP header (len %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">") does not fit in first pbuf (len %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"), IP packet dropped.\n"</span>,</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  iphdr_hlen, p-><a class="code" href="structpbuf.html#a6f82449625e36e294f5d210268c0703f">len</a>));</div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  }</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  <span class="keywordflow">if</span> (iphdr_len > p-><a class="code" href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a>) {</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a>,</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  (<span class="stringliteral">"IP (len %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">") is longer than pbuf (len %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"), IP packet dropped.\n"</span>,</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  iphdr_len, p-><a class="code" href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a>));</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  }</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  <span class="comment">/* free (drop) packet pbufs */</span></div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.lenerr);</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.drop);</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipindiscards);</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</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>  <span class="comment">/* verify checksum */</span></div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span> <span class="preprocessor">#if CHECKSUM_CHECK_IP</span></div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <a class="code" href="netif_8h.html#ad968df1b35c2fae368e087966e3bc677">IF__NETIF_CHECKSUM_ENABLED</a>(inp, NETIF_CHECKSUM_CHECK_IP) {</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  <span class="keywordflow">if</span> (<a class="code" href="inet__chksum_8h.html#a34f1aa1587562a09e11b704b51bab043">inet_chksum</a>(iphdr, iphdr_hlen) != 0) {</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  </div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a>,</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  (<span class="stringliteral">"Checksum (0x%"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">") failed, IP packet dropped.\n"</span>, <a class="code" href="inet__chksum_8h.html#a34f1aa1587562a09e11b704b51bab043">inet_chksum</a>(iphdr, iphdr_hlen)));</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  ip4_debug_print(p);</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.chkerr);</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.drop);</div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipinhdrerrors);</div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  }</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  }</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  </div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  <span class="comment">/* copy IP addresses to aligned ip_addr_t */</span></div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  ip_addr_copy_from_ip4(<a class="code" href="ip_8h.html#ac944fb6564f181bc90bc7c2b8b00d94c">ip_data</a>.<a class="code" href="structip__globals.html#a0b4e54250c692c638408de54593d2aa1">current_iphdr_dest</a>, iphdr->dest);</div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  ip_addr_copy_from_ip4(<a class="code" href="ip_8h.html#ac944fb6564f181bc90bc7c2b8b00d94c">ip_data</a>.<a class="code" href="structip__globals.html#a04d85a3dc2c417050b3e088fa58a74b0">current_iphdr_src</a>, iphdr->src);</div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  </div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  <span class="comment">/* match packet against an interface, i.e. is this packet for us? */</span></div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="keywordflow">if</span> (ip4_addr_ismulticast(ip4_current_dest_addr())) {</div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span> <span class="preprocessor">#if LWIP_IGMP</span></div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span> <a class="code" href="armv6_2kpanic_8c.html#adb9a182aa071791a306163d50d653deb">kpanic</a>(<span class="stringliteral">"A"</span>);</div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="keywordflow">if</span> ((inp-><a class="code" href="structnetif.html#a1c171db6097bbb6f09f63549a66e00ea">flags</a> & <a class="code" href="group__netif__flags.html#gac9493b923d733c73f6006d9714826558">NETIF_FLAG_IGMP</a>) && (igmp_lookfor_group(inp, ip4_current_dest_addr()))) {</div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  <span class="comment">/* IGMP snooping switches need 0.0.0.0 to be allowed as source address (RFC 4541) */</span></div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  ip4_addr_t allsystems;</div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  IP4_ADDR(&allsystems, 224, 0, 0, 1);</div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  <span class="keywordflow">if</span> (ip4_addr_cmp(ip4_current_dest_addr(), &allsystems) &&</div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  ip4_addr_isany(ip4_current_src_addr())) {</div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  check_ip_src = 0;</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>  <a class="code" href="structnetif.html">netif</a> = inp;</div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  <a class="code" href="structnetif.html">netif</a> = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  }</div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span> <span class="preprocessor">#else </span><span class="comment">/* LWIP_IGMP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span> <a class="code" href="armv6_2kpanic_8c.html#adb9a182aa071791a306163d50d653deb">kpanic</a>(<span class="stringliteral">"B"</span>);</div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  <span class="keywordflow">if</span> ((<a class="code" href="group__netif.html#ga94a4c24c988afc0a577387730f303b19">netif_is_up</a>(inp)) && (!ip4_addr_isany_val(*netif_ip4_addr(inp)))) {</div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  <a class="code" href="structnetif.html">netif</a> = inp;</div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  <a class="code" href="structnetif.html">netif</a> = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  }</div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_IGMP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  <span class="comment">/* start trying with inp. if that's not acceptable, start walking the</span></div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span> <span class="comment"> list of configured netifs.</span></div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span> <span class="comment"> 'first' is used as a boolean to mark whether we started walking the list */</span></div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  <span class="keywordtype">int</span> first = 1;</div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  <a class="code" href="structnetif.html">netif</a> = inp;</div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  <span class="keywordflow">do</span> {</div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span> <span class="keywordflow">if</span> (ip4_addr_get_u32(&iphdr->dest) == ip4_addr_get_u32(netif_ip4_addr(<a class="code" href="structnetif.html">netif</a>)))</div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"ip_input: iphdr->dest 0x%"</span><a class="code" href="group__compiler__abstraction.html#gac219830a93d05c5f18f64ce87a34be14">X32_F</a><span class="stringliteral">" netif->ip_addr 0x%"</span><a class="code" href="group__compiler__abstraction.html#gac219830a93d05c5f18f64ce87a34be14">X32_F</a><span class="stringliteral">" (0x%"</span><a class="code" href="group__compiler__abstraction.html#gac219830a93d05c5f18f64ce87a34be14">X32_F</a><span class="stringliteral">", 0x%"</span><a class="code" href="group__compiler__abstraction.html#gac219830a93d05c5f18f64ce87a34be14">X32_F</a><span class="stringliteral">", 0x%"</span><a class="code" href="group__compiler__abstraction.html#gac219830a93d05c5f18f64ce87a34be14">X32_F</a><span class="stringliteral">")\n"</span>,</div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  ip4_addr_get_u32(&iphdr->dest), ip4_addr_get_u32(netif_ip4_addr(<a class="code" href="structnetif.html">netif</a>)),</div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  ip4_addr_get_u32(&iphdr->dest) & ip4_addr_get_u32(netif_ip4_netmask(<a class="code" href="structnetif.html">netif</a>)),</div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  ip4_addr_get_u32(netif_ip4_addr(<a class="code" href="structnetif.html">netif</a>)) & ip4_addr_get_u32(netif_ip4_netmask(<a class="code" href="structnetif.html">netif</a>)),</div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  ip4_addr_get_u32(&iphdr->dest) & ~ip4_addr_get_u32(netif_ip4_netmask(<a class="code" href="structnetif.html">netif</a>))));</div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  </div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="comment">/* interface is up and configured? */</span></div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  <span class="keywordflow">if</span> ((<a class="code" href="group__netif.html#ga94a4c24c988afc0a577387730f303b19">netif_is_up</a>(<a class="code" href="structnetif.html">netif</a>)) && (!ip4_addr_isany_val(*netif_ip4_addr(<a class="code" href="structnetif.html">netif</a>)))) {</div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  <span class="comment">/* unicast to this interface address? */</span></div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  <span class="keywordflow">if</span> (ip4_addr_cmp(ip4_current_dest_addr(), netif_ip4_addr(<a class="code" href="structnetif.html">netif</a>)) ||</div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  <span class="comment">/* or broadcast on this interface network address? */</span></div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  ip4_addr_isbroadcast(ip4_current_dest_addr(), <a class="code" href="structnetif.html">netif</a>)</div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span> #<span class="keywordflow">if</span> <a class="code" href="lwipopts_8h.html#a724a0ea765d5a47d026d529725f31c01">LWIP_NETIF_LOOPBACK</a> && !<a class="code" href="lwipopts_8h.html#aa2b1f736373cd896e212644aa453fbaf">LWIP_HAVE_LOOPIF</a></div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  || (ip4_addr_get_u32(ip4_current_dest_addr()) == <a class="code" href="def_8h.html#afea9c21aa1f56180cdf6fb42ef14a294">PP_HTONL</a>(IPADDR_LOOPBACK))</div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span> #endif <span class="comment">/* LWIP_NETIF_LOOPBACK && !LWIP_HAVE_LOOPIF */</span></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>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"ip4_input: packet accepted on interface %c%c\n"</span>,</div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  <a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#a32fca6ffd28bb9af3f891a378827a67e">name</a>[0], <a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#a32fca6ffd28bb9af3f891a378827a67e">name</a>[1]));</div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  <span class="comment">/* break out of for loop */</span></div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  }</div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span> <span class="preprocessor">#if LWIP_AUTOIP</span></div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  <span class="comment">/* connections to link-local addresses must persist after changing</span></div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span> <span class="comment"> the netif's address (RFC3927 ch. 1.9) */</span></div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  <span class="keywordflow">if</span> (autoip_accept_packet(<a class="code" href="structnetif.html">netif</a>, ip4_current_dest_addr())) {</div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"ip4_input: LLA packet accepted on interface %c%c\n"</span>,</div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  <a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#a32fca6ffd28bb9af3f891a378827a67e">name</a>[0], <a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#a32fca6ffd28bb9af3f891a378827a67e">name</a>[1]));</div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  <span class="comment">/* break out of for loop */</span></div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  }</div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_AUTOIP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  }</div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  <span class="keywordflow">if</span> (first) {</div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span> <span class="preprocessor">#if !LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF</span></div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  <span class="comment">/* Packets sent to the loopback address must not be accepted on an</span></div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span> <span class="comment"> * interface that does not have the loopback address assigned to it,</span></div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span> <span class="comment"> * unless a non-loopback interface is used for loopback traffic. */</span></div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  <span class="keywordflow">if</span> (ip4_addr_isloopback(ip4_current_dest_addr())) {</div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span> <a class="code" href="armv6_2kpanic_8c.html#adb9a182aa071791a306163d50d653deb">kpanic</a>(<span class="stringliteral">"D"</span>);</div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  <a class="code" href="structnetif.html">netif</a> = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  }</div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span> <span class="preprocessor">#endif </span><span class="comment">/* !LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  first = 0;</div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  <a class="code" href="structnetif.html">netif</a> = <a class="code" href="netif_8h.html#a1c8141eaa98f6dc6dfddbb23a706656c">netif_list</a>;</div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  <a class="code" href="structnetif.html">netif</a> = <a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#ae77736b64df442242795220d76be6b86">next</a>;</div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  }</div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  <span class="keywordflow">if</span> (<a class="code" href="structnetif.html">netif</a> == inp) {</div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <a class="code" href="structnetif.html">netif</a> = <a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#ae77736b64df442242795220d76be6b86">next</a>;</div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  }</div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  } <span class="keywordflow">while</span> (<a class="code" href="structnetif.html">netif</a> != <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  }</div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  </div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span> <span class="preprocessor">#if IP_ACCEPT_LINK_LAYER_ADDRESSING</span></div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  <span class="comment">/* Pass DHCP messages regardless of destination address. DHCP traffic is addressed</span></div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span> <span class="comment"> * using link layer addressing (such as Ethernet MAC) so we must not filter on IP.</span></div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span> <span class="comment"> * According to RFC 1542 section 3.1.1, referred by RFC 2131).</span></div>
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span> <span class="comment"> * If you want to accept private broadcast communication while a netif is down,</span></div>
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span> <span class="comment"> * define LWIP_IP_ACCEPT_UDP_PORT(dst_port), e.g.:</span></div>
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span> <span class="comment"> * #define LWIP_IP_ACCEPT_UDP_PORT(dst_port) ((dst_port) == PP_NTOHS(12345))</span></div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  <span class="keywordflow">if</span> (<a class="code" href="structnetif.html">netif</a> == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  <span class="comment">/* remote port is DHCP server? */</span></div>
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  <span class="keywordflow">if</span> (<a class="code" href="prot_2ip4_8h.html#aa2de6f9d35337b4be67d799805665e11">IPH_PROTO</a>(iphdr) == <a class="code" href="prot_2ip_8h.html#a76212e7ef71a99646040d2e454388bed">IP_PROTO_UDP</a>) {</div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  <span class="keyword">struct </span><a class="code" href="structudp__hdr.html">udp_hdr</a> *udphdr = (<span class="keyword">struct </span><a class="code" href="structudp__hdr.html">udp_hdr</a> *)((<a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *)iphdr + iphdr_hlen);</div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"ip4_input: UDP packet to DHCP client port %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"\n"</span>,</div>
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  <a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(udphdr->dest)));</div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  <span class="keywordflow">if</span> (IP_ACCEPT_LINK_LAYER_ADDRESSED_PORT(udphdr->dest)) {</div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"ip4_input: DHCP packet accepted.\n"</span>));</div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  <a class="code" href="structnetif.html">netif</a> = inp;</div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  check_ip_src = 0;</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="preprocessor">#endif </span><span class="comment">/* IP_ACCEPT_LINK_LAYER_ADDRESSING */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  </div>
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  <span class="comment">/* broadcast or multicast packet source address? Compliant with RFC 1122: 3.2.1.3 */</span></div>
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span> <span class="preprocessor">#if LWIP_IGMP || IP_ACCEPT_LINK_LAYER_ADDRESSING</span></div>
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  <span class="keywordflow">if</span> (check_ip_src</div>
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span> #<span class="keywordflow">if</span> IP_ACCEPT_LINK_LAYER_ADDRESSING</div>
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  <span class="comment">/* DHCP servers need 0.0.0.0 to be allowed as source address (RFC 1.1.2.2: 3.2.1.3/a) */</span></div>
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  && !ip4_addr_isany_val(*ip4_current_src_addr())</div>
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span> #endif <span class="comment">/* IP_ACCEPT_LINK_LAYER_ADDRESSING */</span></div>
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  )</div>
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_IGMP || IP_ACCEPT_LINK_LAYER_ADDRESSING */</span><span class="preprocessor"></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="keywordflow">if</span> ((ip4_addr_isbroadcast(ip4_current_src_addr(), inp)) ||</div>
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  (ip4_addr_ismulticast(ip4_current_src_addr()))) {</div>
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  <span class="comment">/* packet source is not valid */</span></div>
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a> | <a class="code" href="group__debugging__levels.html#ga77c491e468bf7d9a1bc48430c1866a96">LWIP_DBG_LEVEL_WARNING</a>, (<span class="stringliteral">"ip4_input: packet source is not valid.\n"</span>));</div>
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  <span class="comment">/* free (drop) packet pbufs */</span></div>
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.drop);</div>
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipinaddrerrors);</div>
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipindiscards);</div>
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</div>
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  }</div>
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  }</div>
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  </div>
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  <span class="comment">/* packet not for us? */</span></div>
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  <span class="keywordflow">if</span> (<a class="code" href="structnetif.html">netif</a> == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  <span class="comment">/* packet not for us, route or discard */</span></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#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a>, (<span class="stringliteral">"ip4_input: packet not for us.\n"</span>));</div>
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span> <span class="preprocessor">#if IP_FORWARD</span></div>
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  <span class="comment">/* non-broadcast packet? */</span></div>
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  <span class="keywordflow">if</span> (!ip4_addr_isbroadcast(ip4_current_dest_addr(), inp)) {</div>
<div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  <span class="comment">/* try to forward IP packet on (other) interfaces */</span></div>
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  ip4_forward(p, iphdr, inp);</div>
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  } <span class="keywordflow">else</span></div>
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_FORWARD */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  {</div>
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.drop);</div>
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipinaddrerrors);</div>
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipindiscards);</div>
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  }</div>
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</div>
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  }</div>
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  <span class="comment">/* packet consists of multiple fragments? */</span></div>
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  <span class="keywordflow">if</span> ((<a class="code" href="prot_2ip4_8h.html#a559dce3878f1d6a46bcb4cb312962397">IPH_OFFSET</a>(iphdr) & <a class="code" href="def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a>(<a class="code" href="prot_2ip4_8h.html#ad059798b16d1f615b5af8770175121ba">IP_OFFMASK</a> | <a class="code" href="prot_2ip4_8h.html#ae8afe1e04bb9bad791443556c3b2cd73">IP_MF</a>)) != 0) {</div>
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span> <span class="preprocessor">#if IP_REASSEMBLY </span><span class="comment">/* packet fragment reassembly code present? */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"IP packet is a fragment (id=0x%04"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">" tot_len=%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" len=%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" MF=%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" offset=%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"), calling ip4_reass()\n"</span>,</div>
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  <a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#ae79eaecc0bf9e4dbb9e47ea56ad2157a">IPH_ID</a>(iphdr)), p-><a class="code" href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a>, <a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#aec0328fe4711b8c1ef4dd6709e4fd6d5">IPH_LEN</a>(iphdr)), (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)!!(<a class="code" href="prot_2ip4_8h.html#a559dce3878f1d6a46bcb4cb312962397">IPH_OFFSET</a>(iphdr) & <a class="code" href="def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a>(<a class="code" href="prot_2ip4_8h.html#ae8afe1e04bb9bad791443556c3b2cd73">IP_MF</a>)), (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)((<a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#a559dce3878f1d6a46bcb4cb312962397">IPH_OFFSET</a>(iphdr)) & <a class="code" href="prot_2ip4_8h.html#ad059798b16d1f615b5af8770175121ba">IP_OFFMASK</a>)*8)));</div>
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  <span class="comment">/* reassemble the packet*/</span></div>
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  p = ip4_reass(p);</div>
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  <span class="comment">/* packet not fully reassembled yet? */</span></div>
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  <span class="keywordflow">if</span> (p == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</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>  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="l00628"></a><span class="lineno"> 628</span> #<span class="keywordflow">else</span> <span class="comment">/* IP_REASSEMBLY == 0, no packet fragment reassembly code present */</span></div>
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a>, (<span class="stringliteral">"IP packet dropped since it was fragmented (0x%"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">") (while IP_REASSEMBLY == 0).\n"</span>,</div>
<div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  <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="l00632"></a><span class="lineno"> 632</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.opterr);</div>
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.drop);</div>
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span>  <span class="comment">/* unsupported protocol feature */</span></div>
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipinunknownprotos);</div>
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</div>
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_REASSEMBLY */</span><span class="preprocessor"></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>  </div>
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span> <span class="preprocessor">#if IP_OPTIONS_ALLOWED == 0 </span><span class="comment">/* no support for IP options in the IP header? */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  </div>
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span> <span class="preprocessor">#if LWIP_IGMP</span></div>
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  <span class="comment">/* there is an extra "router alert" option in IGMP messages which we allow for but do not police */</span></div>
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  <span class="keywordflow">if</span> ((iphdr_hlen > <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>) && (<a class="code" href="prot_2ip4_8h.html#aa2de6f9d35337b4be67d799805665e11">IPH_PROTO</a>(iphdr) != <a class="code" href="prot_2ip_8h.html#a4f8609139fce15ace0c6d117021e29a4">IP_PROTO_IGMP</a>)) {</div>
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  <span class="keywordflow">if</span> (iphdr_hlen > <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>) {</div>
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_IGMP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a>, (<span class="stringliteral">"IP packet dropped since there were IP options (while IP_OPTIONS_ALLOWED == 0).\n"</span>));</div>
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.opterr);</div>
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.drop);</div>
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  <span class="comment">/* unsupported protocol feature */</span></div>
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipinunknownprotos);</div>
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</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> <span class="preprocessor">#endif </span><span class="comment">/* IP_OPTIONS_ALLOWED == 0 */</span><span class="preprocessor"></span></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">/* send to upper layers */</span></div>
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"ip4_input: \n"</span>));</div>
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  ip4_debug_print(p);</div>
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"ip4_input: p->len %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" p->tot_len %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"\n"</span>, p-><a class="code" href="structpbuf.html#a6f82449625e36e294f5d210268c0703f">len</a>, p-><a class="code" href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a>));</div>
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  </div>
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  <a class="code" href="ip_8h.html#ac944fb6564f181bc90bc7c2b8b00d94c">ip_data</a>.<a class="code" href="structip__globals.html#a7803dc5950d143e4433a0df689989bab">current_netif</a> = <a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  <a class="code" href="ip_8h.html#ac944fb6564f181bc90bc7c2b8b00d94c">ip_data</a>.<a class="code" href="structip__globals.html#a7da899c663b1d560b61d92ba6d544701">current_input_netif</a> = inp;</div>
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  <a class="code" href="ip_8h.html#ac944fb6564f181bc90bc7c2b8b00d94c">ip_data</a>.current_ip4_header = iphdr;</div>
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  <a class="code" href="ip_8h.html#ac944fb6564f181bc90bc7c2b8b00d94c">ip_data</a>.<a class="code" href="structip__globals.html#a17004526e6f1a164c0bab01aeac5e34a">current_ip_header_tot_len</a> = <a class="code" href="prot_2ip4_8h.html#a7c60caeb708571a07a44309c10ec3a01">IPH_HL</a>(iphdr) * 4;</div>
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  </div>
<div class="line"><a name="l00668"></a><span class="lineno"> 668</span> <span class="preprocessor">#if LWIP_RAW</span></div>
<div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  <span class="comment">/* raw input did not eat the packet? */</span></div>
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  <span class="keywordflow">if</span> (raw_input(p, inp) == 0)</div>
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_RAW */</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>  <a class="code" href="pbuf_8h.html#aaa17c1951cf2d207b6adfd3947d91f00">pbuf_header</a>(p, -(<a class="code" href="group__compiler__abstraction.html#gacf46f4df0ebab84edebcb69967fdf86b">s16_t</a>)iphdr_hlen); <span class="comment">/* Move to payload, no check necessary. */</span></div>
<div class="line"><a name="l00674"></a><span class="lineno"> 674</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="keywordflow">switch</span> (<a class="code" href="prot_2ip4_8h.html#aa2de6f9d35337b4be67d799805665e11">IPH_PROTO</a>(iphdr)) {</div>
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span> <span class="preprocessor">#if LWIP_UDP</span></div>
<div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  <span class="keywordflow">case</span> <a class="code" href="prot_2ip_8h.html#a76212e7ef71a99646040d2e454388bed">IP_PROTO_UDP</a>:</div>
<div class="line"><a name="l00679"></a><span class="lineno"> 679</span> <span class="preprocessor">#if LWIP_UDPLITE</span></div>
<div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  <span class="keywordflow">case</span> <a class="code" href="prot_2ip_8h.html#a3ef2b8a1cb4f7acee3142337438dfd0d">IP_PROTO_UDPLITE</a>:</div>
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_UDPLITE */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipindelivers);</div>
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  udp_input(p, inp);</div>
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00685"></a><span class="lineno"> 685</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_UDP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00686"></a><span class="lineno"> 686</span> <span class="preprocessor">#if LWIP_TCP</span></div>
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  <span class="keywordflow">case</span> <a class="code" href="prot_2ip_8h.html#a634284ee3a136d6ad61bc5d917ebb82f">IP_PROTO_TCP</a>:</div>
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipindelivers);</div>
<div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  tcp_input(p, inp);</div>
<div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00691"></a><span class="lineno"> 691</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_TCP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00692"></a><span class="lineno"> 692</span> <span class="preprocessor">#if LWIP_ICMP</span></div>
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  <span class="keywordflow">case</span> <a class="code" href="prot_2ip_8h.html#aacaea7b8c4c8a5229c02b653766b4793">IP_PROTO_ICMP</a>:</div>
<div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipindelivers);</div>
<div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  icmp_input(p, inp);</div>
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_ICMP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span> <span class="preprocessor">#if LWIP_IGMP</span></div>
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  <span class="keywordflow">case</span> <a class="code" href="prot_2ip_8h.html#a4f8609139fce15ace0c6d117021e29a4">IP_PROTO_IGMP</a>:</div>
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  igmp_input(p, inp, ip4_current_dest_addr());</div>
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_IGMP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span> <span class="preprocessor">#if LWIP_ICMP</span></div>
<div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  <span class="comment">/* send ICMP destination protocol unreachable unless is was a broadcast */</span></div>
<div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  <span class="keywordflow">if</span> (!ip4_addr_isbroadcast(ip4_current_dest_addr(), <a class="code" href="structnetif.html">netif</a>) &&</div>
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span>  !ip4_addr_ismulticast(ip4_current_dest_addr())) {</div>
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  <a class="code" href="pbuf_8h.html#a27480c41c34021d4417691d327163626">pbuf_header_force</a>(p, iphdr_hlen); <span class="comment">/* Move to ip header, no check necessary. */</span></div>
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a> = iphdr;</div>
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span>  icmp_dest_unreach(p, <a class="code" href="icmp_8h.html#a17637465f209385e5d19ef47fd9266a5a3c7bbd13b613990413ef167017dfbcef">ICMP_DUR_PROTO</a>);</div>
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  }</div>
<div class="line"><a name="l00712"></a><span class="lineno"> 712</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_ICMP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00713"></a><span class="lineno"> 713</span>  <a class="code" href="group__pbuf.html#gab0dd696fb4b6bc65e548944584f1738b">pbuf_free</a>(p);</div>
<div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  </div>
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a>, (<span class="stringliteral">"Unsupported transport protocol %"</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>)<a class="code" href="prot_2ip4_8h.html#aa2de6f9d35337b4be67d799805665e11">IPH_PROTO</a>(iphdr)));</div>
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span>  </div>
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.proterr);</div>
<div class="line"><a name="l00718"></a><span class="lineno"> 718</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.drop);</div>
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipinunknownprotos);</div>
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  }</div>
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  }</div>
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  </div>
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  <span class="comment">/* @todo: this is not really necessary... */</span></div>
<div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  <a class="code" href="ip_8h.html#ac944fb6564f181bc90bc7c2b8b00d94c">ip_data</a>.<a class="code" href="structip__globals.html#a7803dc5950d143e4433a0df689989bab">current_netif</a> = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  <a class="code" href="ip_8h.html#ac944fb6564f181bc90bc7c2b8b00d94c">ip_data</a>.<a class="code" href="structip__globals.html#a7da899c663b1d560b61d92ba6d544701">current_input_netif</a> = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  <a class="code" href="ip_8h.html#ac944fb6564f181bc90bc7c2b8b00d94c">ip_data</a>.current_ip4_header = <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  <a class="code" href="ip_8h.html#ac944fb6564f181bc90bc7c2b8b00d94c">ip_data</a>.<a class="code" href="structip__globals.html#a17004526e6f1a164c0bab01aeac5e34a">current_ip_header_tot_len</a> = 0;</div>
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  ip4_addr_set_any(ip4_current_src_addr());</div>
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  ip4_addr_set_any(ip4_current_dest_addr());</div>
<div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  </div>
<div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadcaa26c163b80b1f6786ca81dadc14b00fb">ERR_OK</a>;</div>
<div class="line"><a name="l00732"></a><span class="lineno"> 732</span> }</div>
<div class="line"><a name="l00733"></a><span class="lineno"> 733</span>  </div>
<div class="line"><a name="l00759"></a><span class="lineno"> 759</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l00760"></a><span class="lineno"> 760</span> ip4_output_if(<span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *p, <span class="keyword">const</span> ip4_addr_t *src, <span class="keyword">const</span> ip4_addr_t *dest,</div>
<div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> ttl, <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> tos,</div>
<div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> proto, <span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>)</div>
<div class="line"><a name="l00763"></a><span class="lineno"> 763</span> {</div>
<div class="line"><a name="l00764"></a><span class="lineno"> 764</span> <span class="preprocessor">#if IP_OPTIONS_SEND</span></div>
<div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  <span class="keywordflow">return</span> ip4_output_if_opt(p, src, dest, ttl, tos, proto, <a class="code" href="structnetif.html">netif</a>, <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>, 0);</div>
<div class="line"><a name="l00766"></a><span class="lineno"> 766</span> }</div>
<div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  </div>
<div class="line"><a name="l00774"></a><span class="lineno"> 774</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l00775"></a><span class="lineno"> 775</span> ip4_output_if_opt(<span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *p, <span class="keyword">const</span> ip4_addr_t *src, <span class="keyword">const</span> ip4_addr_t *dest,</div>
<div class="line"><a name="l00776"></a><span class="lineno"> 776</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> ttl, <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> tos, <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> proto, <span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>, <span class="keywordtype">void</span> *ip_options,</div>
<div class="line"><a name="l00777"></a><span class="lineno"> 777</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> optlen)</div>
<div class="line"><a name="l00778"></a><span class="lineno"> 778</span> {</div>
<div class="line"><a name="l00779"></a><span class="lineno"> 779</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_OPTIONS_SEND */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00780"></a><span class="lineno"> 780</span>  <span class="keyword">const</span> ip4_addr_t *src_used = src;</div>
<div class="line"><a name="l00781"></a><span class="lineno"> 781</span>  <span class="keywordflow">if</span> (dest != <a class="code" href="ip_8h.html#a2b7dff1859ced5f2be3fc3da231819d7">LWIP_IP_HDRINCL</a>) {</div>
<div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  <span class="keywordflow">if</span> (ip4_addr_isany(src)) {</div>
<div class="line"><a name="l00783"></a><span class="lineno"> 783</span>  src_used = netif_ip4_addr(<a class="code" href="structnetif.html">netif</a>);</div>
<div class="line"><a name="l00784"></a><span class="lineno"> 784</span>  }</div>
<div class="line"><a name="l00785"></a><span class="lineno"> 785</span>  }</div>
<div class="line"><a name="l00786"></a><span class="lineno"> 786</span>  </div>
<div class="line"><a name="l00787"></a><span class="lineno"> 787</span> <span class="preprocessor">#if IP_OPTIONS_SEND</span></div>
<div class="line"><a name="l00788"></a><span class="lineno"> 788</span>  <span class="keywordflow">return</span> ip4_output_if_opt_src(p, src_used, dest, ttl, tos, proto, <a class="code" href="structnetif.html">netif</a>,</div>
<div class="line"><a name="l00789"></a><span class="lineno"> 789</span>  ip_options, optlen);</div>
<div class="line"><a name="l00790"></a><span class="lineno"> 790</span> <span class="preprocessor">#else </span><span class="comment">/* IP_OPTIONS_SEND */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00791"></a><span class="lineno"> 791</span>  <span class="keywordflow">return</span> ip4_output_if_src(p, src_used, dest, ttl, tos, proto, <a class="code" href="structnetif.html">netif</a>);</div>
<div class="line"><a name="l00792"></a><span class="lineno"> 792</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_OPTIONS_SEND */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00793"></a><span class="lineno"> 793</span> }</div>
<div class="line"><a name="l00794"></a><span class="lineno"> 794</span>  </div>
<div class="line"><a name="l00799"></a><span class="lineno"> 799</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l00800"></a><span class="lineno"> 800</span> ip4_output_if_src(<span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *p, <span class="keyword">const</span> ip4_addr_t *src, <span class="keyword">const</span> ip4_addr_t *dest,</div>
<div class="line"><a name="l00801"></a><span class="lineno"> 801</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> ttl, <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> tos,</div>
<div class="line"><a name="l00802"></a><span class="lineno"> 802</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> proto, <span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>)</div>
<div class="line"><a name="l00803"></a><span class="lineno"> 803</span> {</div>
<div class="line"><a name="l00804"></a><span class="lineno"> 804</span> <span class="preprocessor">#if IP_OPTIONS_SEND</span></div>
<div class="line"><a name="l00805"></a><span class="lineno"> 805</span>  <span class="keywordflow">return</span> ip4_output_if_opt_src(p, src, dest, ttl, tos, proto, <a class="code" href="structnetif.html">netif</a>, <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>, 0);</div>
<div class="line"><a name="l00806"></a><span class="lineno"> 806</span> }</div>
<div class="line"><a name="l00807"></a><span class="lineno"> 807</span>  </div>
<div class="line"><a name="l00812"></a><span class="lineno"> 812</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l00813"></a><span class="lineno"> 813</span> ip4_output_if_opt_src(<span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *p, <span class="keyword">const</span> ip4_addr_t *src, <span class="keyword">const</span> ip4_addr_t *dest,</div>
<div class="line"><a name="l00814"></a><span class="lineno"> 814</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> ttl, <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> tos, <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> proto, <span class="keyword">struct</span> <a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>, <span class="keywordtype">void</span> *ip_options,</div>
<div class="line"><a name="l00815"></a><span class="lineno"> 815</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> optlen)</div>
<div class="line"><a name="l00816"></a><span class="lineno"> 816</span> {</div>
<div class="line"><a name="l00817"></a><span class="lineno"> 817</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_OPTIONS_SEND */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00818"></a><span class="lineno"> 818</span>  <span class="keyword">struct </span><a class="code" href="structip__hdr.html">ip_hdr</a> *iphdr;</div>
<div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  ip4_addr_t dest_addr;</div>
<div class="line"><a name="l00820"></a><span class="lineno"> 820</span> <span class="preprocessor">#if CHECKSUM_GEN_IP_INLINE</span></div>
<div class="line"><a name="l00821"></a><span class="lineno"> 821</span>  <a class="code" href="group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a> chk_sum = 0;</div>
<div class="line"><a name="l00822"></a><span class="lineno"> 822</span> <span class="preprocessor">#endif </span><span class="comment">/* CHECKSUM_GEN_IP_INLINE */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00823"></a><span class="lineno"> 823</span>  </div>
<div class="line"><a name="l00824"></a><span class="lineno"> 824</span>  <a class="code" href="ip_8h.html#a355679dba1c0d8ef07ce3abcd28e3063">LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX</a>(p);</div>
<div class="line"><a name="l00825"></a><span class="lineno"> 825</span>  </div>
<div class="line"><a name="l00826"></a><span class="lineno"> 826</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipoutrequests);</div>
<div class="line"><a name="l00827"></a><span class="lineno"> 827</span>  </div>
<div class="line"><a name="l00828"></a><span class="lineno"> 828</span>  <span class="comment">/* Should the IP header be generated or is it already included in p? */</span></div>
<div class="line"><a name="l00829"></a><span class="lineno"> 829</span>  <span class="keywordflow">if</span> (dest != <a class="code" href="ip_8h.html#a2b7dff1859ced5f2be3fc3da231819d7">LWIP_IP_HDRINCL</a>) {</div>
<div class="line"><a name="l00830"></a><span class="lineno"> 830</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> ip_hlen = <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>;</div>
<div class="line"><a name="l00831"></a><span class="lineno"> 831</span> <span class="preprocessor">#if IP_OPTIONS_SEND</span></div>
<div class="line"><a name="l00832"></a><span class="lineno"> 832</span>  <a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> optlen_aligned = 0;</div>
<div class="line"><a name="l00833"></a><span class="lineno"> 833</span>  <span class="keywordflow">if</span> (optlen != 0) {</div>
<div class="line"><a name="l00834"></a><span class="lineno"> 834</span> <span class="preprocessor">#if CHECKSUM_GEN_IP_INLINE</span></div>
<div class="line"><a name="l00835"></a><span class="lineno"> 835</span>  <span class="keywordtype">int</span> i;</div>
<div class="line"><a name="l00836"></a><span class="lineno"> 836</span> <span class="preprocessor">#endif </span><span class="comment">/* CHECKSUM_GEN_IP_INLINE */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00837"></a><span class="lineno"> 837</span>  <span class="comment">/* round up to a multiple of 4 */</span></div>
<div class="line"><a name="l00838"></a><span class="lineno"> 838</span>  optlen_aligned = ((optlen + 3) & ~3);</div>
<div class="line"><a name="l00839"></a><span class="lineno"> 839</span>  ip_hlen += optlen_aligned;</div>
<div class="line"><a name="l00840"></a><span class="lineno"> 840</span>  <span class="comment">/* First write in the IP options */</span></div>
<div class="line"><a name="l00841"></a><span class="lineno"> 841</span>  <span class="keywordflow">if</span> (<a class="code" href="pbuf_8h.html#aaa17c1951cf2d207b6adfd3947d91f00">pbuf_header</a>(p, optlen_aligned)) {</div>
<div class="line"><a name="l00842"></a><span class="lineno"> 842</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a>, (<span class="stringliteral">"ip4_output_if_opt: not enough room for IP options in pbuf\n"</span>));</div>
<div class="line"><a name="l00843"></a><span class="lineno"> 843</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.err);</div>
<div class="line"><a name="l00844"></a><span class="lineno"> 844</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipoutdiscards);</div>
<div class="line"><a name="l00845"></a><span class="lineno"> 845</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadca05c91366f1b5203a5db9a241b415cd63">ERR_BUF</a>;</div>
<div class="line"><a name="l00846"></a><span class="lineno"> 846</span>  }</div>
<div class="line"><a name="l00847"></a><span class="lineno"> 847</span>  <a class="code" href="lwipopts_8h.html#aa1dd57a66b6de8c0593e9e3e8d1411f6">MEMCPY</a>(p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>, ip_options, optlen);</div>
<div class="line"><a name="l00848"></a><span class="lineno"> 848</span>  <span class="keywordflow">if</span> (optlen < optlen_aligned) {</div>
<div class="line"><a name="l00849"></a><span class="lineno"> 849</span>  <span class="comment">/* zero the remaining bytes */</span></div>
<div class="line"><a name="l00850"></a><span class="lineno"> 850</span>  <a class="code" href="string_8h.html#ace4b911463887af5e748326323e99a23">memset</a>(((<span class="keywordtype">char</span>*)p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>) + optlen, 0, optlen_aligned - optlen);</div>
<div class="line"><a name="l00851"></a><span class="lineno"> 851</span>  }</div>
<div class="line"><a name="l00852"></a><span class="lineno"> 852</span> <span class="preprocessor">#if CHECKSUM_GEN_IP_INLINE</span></div>
<div class="line"><a name="l00853"></a><span class="lineno"> 853</span>  <span class="keywordflow">for</span> (i = 0; i < optlen_aligned/2; i++) {</div>
<div class="line"><a name="l00854"></a><span class="lineno"> 854</span>  chk_sum += ((<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>*)p-><a class="code" href="structpbuf.html#a8d32dc3e964369d4eec638fc37fbc460">payload</a>)[i];</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> <span class="preprocessor">#endif </span><span class="comment">/* CHECKSUM_GEN_IP_INLINE */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00857"></a><span class="lineno"> 857</span>  }</div>
<div class="line"><a name="l00858"></a><span class="lineno"> 858</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_OPTIONS_SEND */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00859"></a><span class="lineno"> 859</span>  <span class="comment">/* generate IP header */</span></div>
<div class="line"><a name="l00860"></a><span class="lineno"> 860</span>  <span class="keywordflow">if</span> (<a class="code" href="pbuf_8h.html#aaa17c1951cf2d207b6adfd3947d91f00">pbuf_header</a>(p, <a class="code" href="prot_2ip4_8h.html#ad76777d4d34f33ab5f715f9ca15503c3">IP_HLEN</a>)) {</div>
<div class="line"><a name="l00861"></a><span class="lineno"> 861</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a> | <a class="code" href="group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a>, (<span class="stringliteral">"ip4_output: not enough room for IP header in pbuf\n"</span>));</div>
<div class="line"><a name="l00862"></a><span class="lineno"> 862</span>  </div>
<div class="line"><a name="l00863"></a><span class="lineno"> 863</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.err);</div>
<div class="line"><a name="l00864"></a><span class="lineno"> 864</span>  <a class="code" href="stats_8h.html#a237a8f1e47af42fb612e936e928a9ced">MIB2_STATS_INC</a>(mib2.ipoutdiscards);</div>
<div class="line"><a name="l00865"></a><span class="lineno"> 865</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadca05c91366f1b5203a5db9a241b415cd63">ERR_BUF</a>;</div>
<div class="line"><a name="l00866"></a><span class="lineno"> 866</span>  }</div>
<div class="line"><a name="l00867"></a><span class="lineno"> 867</span>  </div>
<div class="line"><a name="l00868"></a><span class="lineno"> 868</span>  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="l00869"></a><span class="lineno"> 869</span>  <a class="code" href="debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"check that first pbuf can hold struct ip_hdr"</span>,</div>
<div class="line"><a name="l00870"></a><span class="lineno"> 870</span>  (p-><a class="code" href="structpbuf.html#a6f82449625e36e294f5d210268c0703f">len</a> >= <span class="keyword">sizeof</span>(<span class="keyword">struct</span> <a class="code" href="structip__hdr.html">ip_hdr</a>)));</div>
<div class="line"><a name="l00871"></a><span class="lineno"> 871</span>  </div>
<div class="line"><a name="l00872"></a><span class="lineno"> 872</span>  <a class="code" href="prot_2ip4_8h.html#aa0e49f03bd4c3144e3548a0db72d1deb">IPH_TTL_SET</a>(iphdr, ttl);</div>
<div class="line"><a name="l00873"></a><span class="lineno"> 873</span>  <a class="code" href="prot_2ip4_8h.html#a49753f7668f741b1877340bff6fb97c3">IPH_PROTO_SET</a>(iphdr, proto);</div>
<div class="line"><a name="l00874"></a><span class="lineno"> 874</span> <span class="preprocessor">#if CHECKSUM_GEN_IP_INLINE</span></div>
<div class="line"><a name="l00875"></a><span class="lineno"> 875</span>  chk_sum += <a class="code" href="def_8h.html#a7d17b88eabf7766c0bfa89d8f965f67e">PP_NTOHS</a>(proto | (ttl << 8));</div>
<div class="line"><a name="l00876"></a><span class="lineno"> 876</span> <span class="preprocessor">#endif </span><span class="comment">/* CHECKSUM_GEN_IP_INLINE */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00877"></a><span class="lineno"> 877</span>  </div>
<div class="line"><a name="l00878"></a><span class="lineno"> 878</span>  <span class="comment">/* dest cannot be NULL here */</span></div>
<div class="line"><a name="l00879"></a><span class="lineno"> 879</span>  ip4_addr_copy(iphdr->dest, *dest);</div>
<div class="line"><a name="l00880"></a><span class="lineno"> 880</span> <span class="preprocessor">#if CHECKSUM_GEN_IP_INLINE</span></div>
<div class="line"><a name="l00881"></a><span class="lineno"> 881</span>  chk_sum += ip4_addr_get_u32(&iphdr->dest) & 0xFFFF;</div>
<div class="line"><a name="l00882"></a><span class="lineno"> 882</span>  chk_sum += ip4_addr_get_u32(&iphdr->dest) >> 16;</div>
<div class="line"><a name="l00883"></a><span class="lineno"> 883</span> <span class="preprocessor">#endif </span><span class="comment">/* CHECKSUM_GEN_IP_INLINE */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00884"></a><span class="lineno"> 884</span>  </div>
<div class="line"><a name="l00885"></a><span class="lineno"> 885</span>  <a class="code" href="prot_2ip4_8h.html#a037908f4291c62a7336362506cea01af">IPH_VHL_SET</a>(iphdr, 4, ip_hlen / 4);</div>
<div class="line"><a name="l00886"></a><span class="lineno"> 886</span>  <a class="code" href="prot_2ip4_8h.html#af4e4d0cbbb1de541eea2b53b91e8b172">IPH_TOS_SET</a>(iphdr, tos);</div>
<div class="line"><a name="l00887"></a><span class="lineno"> 887</span> <span class="preprocessor">#if CHECKSUM_GEN_IP_INLINE</span></div>
<div class="line"><a name="l00888"></a><span class="lineno"> 888</span>  chk_sum += <a class="code" href="def_8h.html#a7d17b88eabf7766c0bfa89d8f965f67e">PP_NTOHS</a>(tos | (iphdr->_v_hl << 8));</div>
<div class="line"><a name="l00889"></a><span class="lineno"> 889</span> <span class="preprocessor">#endif </span><span class="comment">/* CHECKSUM_GEN_IP_INLINE */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00890"></a><span class="lineno"> 890</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>(p-><a class="code" href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a>));</div>
<div class="line"><a name="l00891"></a><span class="lineno"> 891</span> <span class="preprocessor">#if CHECKSUM_GEN_IP_INLINE</span></div>
<div class="line"><a name="l00892"></a><span class="lineno"> 892</span>  chk_sum += iphdr->_len;</div>
<div class="line"><a name="l00893"></a><span class="lineno"> 893</span> <span class="preprocessor">#endif </span><span class="comment">/* CHECKSUM_GEN_IP_INLINE */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00894"></a><span class="lineno"> 894</span>  <a class="code" href="prot_2ip4_8h.html#a4c2189e1400dca1c0f785de96ceda2b6">IPH_OFFSET_SET</a>(iphdr, 0);</div>
<div class="line"><a name="l00895"></a><span class="lineno"> 895</span>  <a class="code" href="prot_2ip4_8h.html#a3b2c57b6a9dc9cc32fc2f145a96bbf8f">IPH_ID_SET</a>(iphdr, <a class="code" href="def_8c.html#ad637280639de4066392e6b5614fa3e56">lwip_htons</a>(ip_id));</div>
<div class="line"><a name="l00896"></a><span class="lineno"> 896</span> <span class="preprocessor">#if CHECKSUM_GEN_IP_INLINE</span></div>
<div class="line"><a name="l00897"></a><span class="lineno"> 897</span>  chk_sum += iphdr->_id;</div>
<div class="line"><a name="l00898"></a><span class="lineno"> 898</span> <span class="preprocessor">#endif </span><span class="comment">/* CHECKSUM_GEN_IP_INLINE */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00899"></a><span class="lineno"> 899</span>  ++ip_id;</div>
<div class="line"><a name="l00900"></a><span class="lineno"> 900</span>  </div>
<div class="line"><a name="l00901"></a><span class="lineno"> 901</span>  <span class="keywordflow">if</span> (src == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00902"></a><span class="lineno"> 902</span>  ip4_addr_copy(iphdr->src, *IP4_ADDR_ANY4);</div>
<div class="line"><a name="l00903"></a><span class="lineno"> 903</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00904"></a><span class="lineno"> 904</span>  <span class="comment">/* src cannot be NULL here */</span></div>
<div class="line"><a name="l00905"></a><span class="lineno"> 905</span>  ip4_addr_copy(iphdr->src, *src);</div>
<div class="line"><a name="l00906"></a><span class="lineno"> 906</span>  }</div>
<div class="line"><a name="l00907"></a><span class="lineno"> 907</span>  </div>
<div class="line"><a name="l00908"></a><span class="lineno"> 908</span> <span class="preprocessor">#if CHECKSUM_GEN_IP_INLINE</span></div>
<div class="line"><a name="l00909"></a><span class="lineno"> 909</span>  chk_sum += ip4_addr_get_u32(&iphdr->src) & 0xFFFF;</div>
<div class="line"><a name="l00910"></a><span class="lineno"> 910</span>  chk_sum += ip4_addr_get_u32(&iphdr->src) >> 16;</div>
<div class="line"><a name="l00911"></a><span class="lineno"> 911</span>  chk_sum = (chk_sum >> 16) + (chk_sum & 0xFFFF);</div>
<div class="line"><a name="l00912"></a><span class="lineno"> 912</span>  chk_sum = (chk_sum >> 16) + chk_sum;</div>
<div class="line"><a name="l00913"></a><span class="lineno"> 913</span>  chk_sum = ~chk_sum;</div>
<div class="line"><a name="l00914"></a><span class="lineno"> 914</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="l00915"></a><span class="lineno"> 915</span>  iphdr->_chksum = (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)chk_sum; <span class="comment">/* network order */</span></div>
<div class="line"><a name="l00916"></a><span class="lineno"> 916</span>  }</div>
<div class="line"><a name="l00917"></a><span class="lineno"> 917</span> <span class="preprocessor">#if LWIP_CHECKSUM_CTRL_PER_NETIF</span></div>
<div class="line"><a name="l00918"></a><span class="lineno"> 918</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00919"></a><span class="lineno"> 919</span>  <a class="code" href="prot_2ip4_8h.html#aec30403fb98b013bd094688de55cdaef">IPH_CHKSUM_SET</a>(iphdr, 0);</div>
<div class="line"><a name="l00920"></a><span class="lineno"> 920</span>  }</div>
<div class="line"><a name="l00921"></a><span class="lineno"> 921</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_CHECKSUM_CTRL_PER_NETIF*/</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00922"></a><span class="lineno"> 922</span> <span class="preprocessor">#else </span><span class="comment">/* CHECKSUM_GEN_IP_INLINE */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00923"></a><span class="lineno"> 923</span>  <a class="code" href="prot_2ip4_8h.html#aec30403fb98b013bd094688de55cdaef">IPH_CHKSUM_SET</a>(iphdr, 0);</div>
<div class="line"><a name="l00924"></a><span class="lineno"> 924</span> <span class="preprocessor">#if CHECKSUM_GEN_IP</span></div>
<div class="line"><a name="l00925"></a><span class="lineno"> 925</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="l00926"></a><span class="lineno"> 926</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, ip_hlen));</div>
<div class="line"><a name="l00927"></a><span class="lineno"> 927</span>  }</div>
<div class="line"><a name="l00928"></a><span class="lineno"> 928</span> <span class="preprocessor">#endif </span><span class="comment">/* CHECKSUM_GEN_IP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00929"></a><span class="lineno"> 929</span> <span class="preprocessor">#endif </span><span class="comment">/* CHECKSUM_GEN_IP_INLINE */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00930"></a><span class="lineno"> 930</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00931"></a><span class="lineno"> 931</span>  <span class="comment">/* IP header already included in p */</span></div>
<div class="line"><a name="l00932"></a><span class="lineno"> 932</span>  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="l00933"></a><span class="lineno"> 933</span>  ip4_addr_copy(dest_addr, iphdr->dest);</div>
<div class="line"><a name="l00934"></a><span class="lineno"> 934</span>  dest = &dest_addr;</div>
<div class="line"><a name="l00935"></a><span class="lineno"> 935</span>  }</div>
<div class="line"><a name="l00936"></a><span class="lineno"> 936</span>  </div>
<div class="line"><a name="l00937"></a><span class="lineno"> 937</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.xmit);</div>
<div class="line"><a name="l00938"></a><span class="lineno"> 938</span>  </div>
<div class="line"><a name="l00939"></a><span class="lineno"> 939</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"ip4_output_if: %c%c%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"\n"</span>, <a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#a32fca6ffd28bb9af3f891a378827a67e">name</a>[0], <a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#a32fca6ffd28bb9af3f891a378827a67e">name</a>[1], (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)<a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#ab7ef01e505dd2feb781fe86756b1c973">num</a>));</div>
<div class="line"><a name="l00940"></a><span class="lineno"> 940</span>  ip4_debug_print(p);</div>
<div class="line"><a name="l00941"></a><span class="lineno"> 941</span>  </div>
<div class="line"><a name="l00942"></a><span class="lineno"> 942</span> <span class="preprocessor">#if ENABLE_LOOPBACK</span></div>
<div class="line"><a name="l00943"></a><span class="lineno"> 943</span>  <span class="keywordflow">if</span> (ip4_addr_cmp(dest, netif_ip4_addr(<a class="code" href="structnetif.html">netif</a>))</div>
<div class="line"><a name="l00944"></a><span class="lineno"> 944</span> #<span class="keywordflow">if</span> !<a class="code" href="lwipopts_8h.html#aa2b1f736373cd896e212644aa453fbaf">LWIP_HAVE_LOOPIF</a></div>
<div class="line"><a name="l00945"></a><span class="lineno"> 945</span>  || ip4_addr_isloopback(dest)</div>
<div class="line"><a name="l00946"></a><span class="lineno"> 946</span> #endif <span class="comment">/* !LWIP_HAVE_LOOPIF */</span></div>
<div class="line"><a name="l00947"></a><span class="lineno"> 947</span>  ) {</div>
<div class="line"><a name="l00948"></a><span class="lineno"> 948</span>  <span class="comment">/* Packet to self, enqueue it for loopback */</span></div>
<div class="line"><a name="l00949"></a><span class="lineno"> 949</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"netif_loop_output()"</span>));</div>
<div class="line"><a name="l00950"></a><span class="lineno"> 950</span>  <span class="keywordflow">return</span> netif_loop_output(<a class="code" href="structnetif.html">netif</a>, p);</div>
<div class="line"><a name="l00951"></a><span class="lineno"> 951</span>  }</div>
<div class="line"><a name="l00952"></a><span class="lineno"> 952</span> <span class="preprocessor">#if LWIP_MULTICAST_TX_OPTIONS</span></div>
<div class="line"><a name="l00953"></a><span class="lineno"> 953</span>  <span class="keywordflow">if</span> ((p-><a class="code" href="structpbuf.html#aa4d1af2cab3d9280d29212095b5b872a">flags</a> & <a class="code" href="pbuf_8h.html#ab8ad153151a8c157335d9c0cedc007e6">PBUF_FLAG_MCASTLOOP</a>) != 0) {</div>
<div class="line"><a name="l00954"></a><span class="lineno"> 954</span>  netif_loop_output(<a class="code" href="structnetif.html">netif</a>, p);</div>
<div class="line"><a name="l00955"></a><span class="lineno"> 955</span>  }</div>
<div class="line"><a name="l00956"></a><span class="lineno"> 956</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_MULTICAST_TX_OPTIONS */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00957"></a><span class="lineno"> 957</span> <span class="preprocessor">#endif </span><span class="comment">/* ENABLE_LOOPBACK */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00958"></a><span class="lineno"> 958</span> <span class="preprocessor">#if IP_FRAG</span></div>
<div class="line"><a name="l00959"></a><span class="lineno"> 959</span>  <span class="comment">/* don't fragment if interface has mtu set to 0 [loopif] */</span></div>
<div class="line"><a name="l00960"></a><span class="lineno"> 960</span>  <span class="keywordflow">if</span> (<a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#aca7d56b4e0f822b0ced2885f222b8d48">mtu</a> && (p-><a class="code" href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">tot_len</a> > <a class="code" href="structnetif.html">netif</a>-><a class="code" href="structnetif.html#aca7d56b4e0f822b0ced2885f222b8d48">mtu</a>)) {</div>
<div class="line"><a name="l00961"></a><span class="lineno"> 961</span>  <span class="keywordflow">return</span> ip4_frag(p, <a class="code" href="structnetif.html">netif</a>, dest);</div>
<div class="line"><a name="l00962"></a><span class="lineno"> 962</span>  }</div>
<div class="line"><a name="l00963"></a><span class="lineno"> 963</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_FRAG */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00964"></a><span class="lineno"> 964</span>  </div>
<div class="line"><a name="l00965"></a><span class="lineno"> 965</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"ip4_output_if: call netif->output()\n"</span>));</div>
<div class="line"><a name="l00966"></a><span class="lineno"> 966</span>  <span class="keywordflow">return</span> <a class="code" href="structnetif.html">netif</a>->output(<a class="code" href="structnetif.html">netif</a>, p, dest);</div>
<div class="line"><a name="l00967"></a><span class="lineno"> 967</span> }</div>
<div class="line"><a name="l00968"></a><span class="lineno"> 968</span>  </div>
<div class="line"><a name="l00986"></a><span class="lineno"> 986</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l00987"></a><span class="lineno"> 987</span> ip4_output(<span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *p, <span class="keyword">const</span> ip4_addr_t *src, <span class="keyword">const</span> ip4_addr_t *dest,</div>
<div class="line"><a name="l00988"></a><span class="lineno"> 988</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> ttl, <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> tos, <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> proto)</div>
<div class="line"><a name="l00989"></a><span class="lineno"> 989</span> {</div>
<div class="line"><a name="l00990"></a><span class="lineno"> 990</span>  <span class="keyword">struct </span><a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l00991"></a><span class="lineno"> 991</span>  </div>
<div class="line"><a name="l00992"></a><span class="lineno"> 992</span>  <a class="code" href="ip_8h.html#a355679dba1c0d8ef07ce3abcd28e3063">LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX</a>(p);</div>
<div class="line"><a name="l00993"></a><span class="lineno"> 993</span>  </div>
<div class="line"><a name="l00994"></a><span class="lineno"> 994</span>  <span class="keywordflow">if</span> ((<a class="code" href="structnetif.html">netif</a> = ip4_route_src(dest, src)) == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00995"></a><span class="lineno"> 995</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"ip4_output: No route to %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"\n"</span>,</div>
<div class="line"><a name="l00996"></a><span class="lineno"> 996</span>  ip4_addr1_16(dest), ip4_addr2_16(dest), ip4_addr3_16(dest), ip4_addr4_16(dest)));</div>
<div class="line"><a name="l00997"></a><span class="lineno"> 997</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.rterr);</div>
<div class="line"><a name="l00998"></a><span class="lineno"> 998</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadca9448893187313c0c5a502ca9a9ad1c2a">ERR_RTE</a>;</div>
<div class="line"><a name="l00999"></a><span class="lineno"> 999</span>  }</div>
<div class="line"><a name="l01000"></a><span class="lineno"> 1000</span>  </div>
<div class="line"><a name="l01001"></a><span class="lineno"> 1001</span>  <span class="keywordflow">return</span> ip4_output_if(p, src, dest, ttl, tos, proto, <a class="code" href="structnetif.html">netif</a>);</div>
<div class="line"><a name="l01002"></a><span class="lineno"> 1002</span> }</div>
<div class="line"><a name="l01003"></a><span class="lineno"> 1003</span>  </div>
<div class="line"><a name="l01004"></a><span class="lineno"> 1004</span> <span class="preprocessor">#if LWIP_NETIF_HWADDRHINT</span></div>
<div class="line"><a name="l01005"></a><span class="lineno"> 1005</span>  </div>
<div class="line"><a name="l01023"></a><span class="lineno"> 1023</span> <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a></div>
<div class="line"><a name="l01024"></a><span class="lineno"> 1024</span> ip4_output_hinted(<span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *p, <span class="keyword">const</span> ip4_addr_t *src, <span class="keyword">const</span> ip4_addr_t *dest,</div>
<div class="line"><a name="l01025"></a><span class="lineno"> 1025</span>  <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> ttl, <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> tos, <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> proto, <a class="code" href="group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *addr_hint)</div>
<div class="line"><a name="l01026"></a><span class="lineno"> 1026</span> {</div>
<div class="line"><a name="l01027"></a><span class="lineno"> 1027</span>  <span class="keyword">struct </span><a class="code" href="structnetif.html">netif</a> *<a class="code" href="structnetif.html">netif</a>;</div>
<div class="line"><a name="l01028"></a><span class="lineno"> 1028</span>  <a class="code" href="group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> err;</div>
<div class="line"><a name="l01029"></a><span class="lineno"> 1029</span>  </div>
<div class="line"><a name="l01030"></a><span class="lineno"> 1030</span>  <a class="code" href="ip_8h.html#a355679dba1c0d8ef07ce3abcd28e3063">LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX</a>(p);</div>
<div class="line"><a name="l01031"></a><span class="lineno"> 1031</span>  </div>
<div class="line"><a name="l01032"></a><span class="lineno"> 1032</span>  <span class="keywordflow">if</span> ((<a class="code" href="structnetif.html">netif</a> = ip4_route_src(dest, src)) == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l01033"></a><span class="lineno"> 1033</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"ip4_output: No route to %"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">".%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"\n"</span>,</div>
<div class="line"><a name="l01034"></a><span class="lineno"> 1034</span>  ip4_addr1_16(dest), ip4_addr2_16(dest), ip4_addr3_16(dest), ip4_addr4_16(dest)));</div>
<div class="line"><a name="l01035"></a><span class="lineno"> 1035</span>  <a class="code" href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a>(ip.rterr);</div>
<div class="line"><a name="l01036"></a><span class="lineno"> 1036</span>  <span class="keywordflow">return</span> <a class="code" href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadca9448893187313c0c5a502ca9a9ad1c2a">ERR_RTE</a>;</div>
<div class="line"><a name="l01037"></a><span class="lineno"> 1037</span>  }</div>
<div class="line"><a name="l01038"></a><span class="lineno"> 1038</span>  </div>
<div class="line"><a name="l01039"></a><span class="lineno"> 1039</span>  <a class="code" href="netif_8h.html#ae1c22f1dab74a84d9e31316fd5fdfa11">NETIF_SET_HWADDRHINT</a>(<a class="code" href="structnetif.html">netif</a>, addr_hint);</div>
<div class="line"><a name="l01040"></a><span class="lineno"> 1040</span>  err = ip4_output_if(p, src, dest, ttl, tos, proto, <a class="code" href="structnetif.html">netif</a>);</div>
<div class="line"><a name="l01041"></a><span class="lineno"> 1041</span>  <a class="code" href="netif_8h.html#ae1c22f1dab74a84d9e31316fd5fdfa11">NETIF_SET_HWADDRHINT</a>(<a class="code" href="structnetif.html">netif</a>, <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);</div>
<div class="line"><a name="l01042"></a><span class="lineno"> 1042</span>  </div>
<div class="line"><a name="l01043"></a><span class="lineno"> 1043</span>  <span class="keywordflow">return</span> err;</div>
<div class="line"><a name="l01044"></a><span class="lineno"> 1044</span> }</div>
<div class="line"><a name="l01045"></a><span class="lineno"> 1045</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_NETIF_HWADDRHINT*/</span><span class="preprocessor"></span></div>
<div class="line"><a name="l01046"></a><span class="lineno"> 1046</span>  </div>
<div class="line"><a name="l01047"></a><span class="lineno"> 1047</span> <span class="preprocessor">#if IP_DEBUG</span></div>
<div class="line"><a name="l01048"></a><span class="lineno"> 1048</span> <span class="comment">/* Print an IP header by using LWIP_DEBUGF</span></div>
<div class="line"><a name="l01049"></a><span class="lineno"> 1049</span> <span class="comment"> * @param p an IP packet, p->payload pointing to the IP header</span></div>
<div class="line"><a name="l01050"></a><span class="lineno"> 1050</span> <span class="comment"> */</span></div>
<div class="line"><a name="l01051"></a><span class="lineno"> 1051</span> <span class="keywordtype">void</span></div>
<div class="line"><a name="l01052"></a><span class="lineno"> 1052</span> ip4_debug_print(<span class="keyword">struct</span> <a class="code" href="structpbuf.html">pbuf</a> *p)</div>
<div class="line"><a name="l01053"></a><span class="lineno"> 1053</span> {</div>
<div class="line"><a name="l01054"></a><span class="lineno"> 1054</span>  <span class="keyword">struct </span><a class="code" href="structip__hdr.html">ip_hdr</a> *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="l01055"></a><span class="lineno"> 1055</span>  </div>
<div class="line"><a name="l01056"></a><span class="lineno"> 1056</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"IP header:\n"</span>));</div>
<div class="line"><a name="l01057"></a><span class="lineno"> 1057</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"+-------------------------------+\n"</span>));</div>
<div class="line"><a name="l01058"></a><span class="lineno"> 1058</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"|%2"</span><a class="code" href="group__compiler__abstraction.html#gac05a82d37afb251470f5e17ca15ab6e9">S16_F</a><span class="stringliteral">" |%2"</span><a class="code" href="group__compiler__abstraction.html#gac05a82d37afb251470f5e17ca15ab6e9">S16_F</a><span class="stringliteral">" | 0x%02"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">" | %5"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" | (v, hl, tos, len)\n"</span>,</div>
<div class="line"><a name="l01059"></a><span class="lineno"> 1059</span>  (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)<a class="code" href="prot_2ip4_8h.html#a05a9e8ecf4eff38244b4c13c7e70094c">IPH_V</a>(iphdr),</div>
<div class="line"><a name="l01060"></a><span class="lineno"> 1060</span>  (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)<a class="code" href="prot_2ip4_8h.html#a7c60caeb708571a07a44309c10ec3a01">IPH_HL</a>(iphdr),</div>
<div class="line"><a name="l01061"></a><span class="lineno"> 1061</span>  (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)<a class="code" href="prot_2ip4_8h.html#a13fb5476ab97db9c5de6c1f5ca0d82e6">IPH_TOS</a>(iphdr),</div>
<div class="line"><a name="l01062"></a><span class="lineno"> 1062</span>  <a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#aec0328fe4711b8c1ef4dd6709e4fd6d5">IPH_LEN</a>(iphdr))));</div>
<div class="line"><a name="l01063"></a><span class="lineno"> 1063</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"+-------------------------------+\n"</span>));</div>
<div class="line"><a name="l01064"></a><span class="lineno"> 1064</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"| %5"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" |%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"%"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">"| %4"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" | (id, flags, offset)\n"</span>,</div>
<div class="line"><a name="l01065"></a><span class="lineno"> 1065</span>  <a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#ae79eaecc0bf9e4dbb9e47ea56ad2157a">IPH_ID</a>(iphdr)),</div>
<div class="line"><a name="l01066"></a><span class="lineno"> 1066</span>  (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)(<a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#a559dce3878f1d6a46bcb4cb312962397">IPH_OFFSET</a>(iphdr)) >> 15 & 1),</div>
<div class="line"><a name="l01067"></a><span class="lineno"> 1067</span>  (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)(<a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#a559dce3878f1d6a46bcb4cb312962397">IPH_OFFSET</a>(iphdr)) >> 14 & 1),</div>
<div class="line"><a name="l01068"></a><span class="lineno"> 1068</span>  (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)(<a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#a559dce3878f1d6a46bcb4cb312962397">IPH_OFFSET</a>(iphdr)) >> 13 & 1),</div>
<div class="line"><a name="l01069"></a><span class="lineno"> 1069</span>  (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)(<a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#a559dce3878f1d6a46bcb4cb312962397">IPH_OFFSET</a>(iphdr)) & <a class="code" href="prot_2ip4_8h.html#ad059798b16d1f615b5af8770175121ba">IP_OFFMASK</a>)));</div>
<div class="line"><a name="l01070"></a><span class="lineno"> 1070</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"+-------------------------------+\n"</span>));</div>
<div class="line"><a name="l01071"></a><span class="lineno"> 1071</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"| %3"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" | %3"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" | 0x%04"</span><a class="code" href="group__compiler__abstraction.html#ga1418f92673e54a36b6e376109e526382">X16_F</a><span class="stringliteral">" | (ttl, proto, chksum)\n"</span>,</div>
<div class="line"><a name="l01072"></a><span class="lineno"> 1072</span>  (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)<a class="code" href="prot_2ip4_8h.html#a0d8238411ce35a007170f652e62209b3">IPH_TTL</a>(iphdr),</div>
<div class="line"><a name="l01073"></a><span class="lineno"> 1073</span>  (<a class="code" href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a>)<a class="code" href="prot_2ip4_8h.html#aa2de6f9d35337b4be67d799805665e11">IPH_PROTO</a>(iphdr),</div>
<div class="line"><a name="l01074"></a><span class="lineno"> 1074</span>  <a class="code" href="def_8h.html#ac642bf6057869696d7807564d8309ffc">lwip_ntohs</a>(<a class="code" href="prot_2ip4_8h.html#a773b96f54c75b35bcd24e7f857fcf988">IPH_CHKSUM</a>(iphdr))));</div>
<div class="line"><a name="l01075"></a><span class="lineno"> 1075</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"+-------------------------------+\n"</span>));</div>
<div class="line"><a name="l01076"></a><span class="lineno"> 1076</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"| %3"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" | %3"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" | %3"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" | %3"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" | (src)\n"</span>,</div>
<div class="line"><a name="l01077"></a><span class="lineno"> 1077</span>  ip4_addr1_16(&iphdr->src),</div>
<div class="line"><a name="l01078"></a><span class="lineno"> 1078</span>  ip4_addr2_16(&iphdr->src),</div>
<div class="line"><a name="l01079"></a><span class="lineno"> 1079</span>  ip4_addr3_16(&iphdr->src),</div>
<div class="line"><a name="l01080"></a><span class="lineno"> 1080</span>  ip4_addr4_16(&iphdr->src)));</div>
<div class="line"><a name="l01081"></a><span class="lineno"> 1081</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"+-------------------------------+\n"</span>));</div>
<div class="line"><a name="l01082"></a><span class="lineno"> 1082</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"| %3"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" | %3"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" | %3"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" | %3"</span><a class="code" href="group__compiler__abstraction.html#gaa9d7f6eb2ee9fcc5eda3545dbb1886e0">U16_F</a><span class="stringliteral">" | (dest)\n"</span>,</div>
<div class="line"><a name="l01083"></a><span class="lineno"> 1083</span>  ip4_addr1_16(&iphdr->dest),</div>
<div class="line"><a name="l01084"></a><span class="lineno"> 1084</span>  ip4_addr2_16(&iphdr->dest),</div>
<div class="line"><a name="l01085"></a><span class="lineno"> 1085</span>  ip4_addr3_16(&iphdr->dest),</div>
<div class="line"><a name="l01086"></a><span class="lineno"> 1086</span>  ip4_addr4_16(&iphdr->dest)));</div>
<div class="line"><a name="l01087"></a><span class="lineno"> 1087</span>  <a class="code" href="debug_8h.html#a63a04edf7ff63c951bd8706711956cdb">LWIP_DEBUGF</a>(<a class="code" href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a>, (<span class="stringliteral">"+-------------------------------+\n"</span>));</div>
<div class="line"><a name="l01088"></a><span class="lineno"> 1088</span> }</div>
<div class="line"><a name="l01089"></a><span class="lineno"> 1089</span> <span class="preprocessor">#endif </span><span class="comment">/* IP_DEBUG */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l01090"></a><span class="lineno"> 1090</span>  </div>
<div class="line"><a name="l01091"></a><span class="lineno"> 1091</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="aprot_2ip4_8h_html_aa0e49f03bd4c3144e3548a0db72d1deb"><div class="ttname"><a href="prot_2ip4_8h.html#aa0e49f03bd4c3144e3548a0db72d1deb">IPH_TTL_SET</a></div><div class="ttdeci">#define IPH_TTL_SET(hdr, ttl)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00118">ip4.h:118</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_gac05a82d37afb251470f5e17ca15ab6e9"><div class="ttname"><a href="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="astructudp__hdr_html"><div class="ttname"><a href="structudp__hdr.html">udp_hdr</a></div><div class="ttdef"><b>Definition:</b> <a href="prot_2udp_8h_source.html#l00053">udp.h:53</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_gacf46f4df0ebab84edebcb69967fdf86b"><div class="ttname"><a href="group__compiler__abstraction.html#gacf46f4df0ebab84edebcb69967fdf86b">s16_t</a></div><div class="ttdeci">int16_t s16_t</div><div class="ttdef"><b>Definition:</b> <a href="arch_8h_source.html#l00125">arch.h:125</a></div></div>
<div class="ttc" id="adef_8h_html"><div class="ttname"><a href="def_8h.html">def.h</a></div></div>
<div class="ttc" id="agroup__netif__flags_html_gac9493b923d733c73f6006d9714826558"><div class="ttname"><a href="group__netif__flags.html#gac9493b923d733c73f6006d9714826558">NETIF_FLAG_IGMP</a></div><div class="ttdeci">#define NETIF_FLAG_IGMP</div><div class="ttdef"><b>Definition:</b> <a href="netif_8h_source.html#l00106">netif.h:106</a></div></div>
<div class="ttc" id="aperf_8h_html_a8ac3afe5d720793a229fbf70a78eb82f"><div class="ttname"><a href="perf_8h.html#a8ac3afe5d720793a229fbf70a78eb82f">PERF_STOP</a></div><div class="ttdeci">#define PERF_STOP(x)</div><div class="ttdef"><b>Definition:</b> <a href="perf_8h_source.html#l00021">perf.h:21</a></div></div>
<div class="ttc" id="apbuf_8h_html_a6772c16662bbb78597399add086500c0"><div class="ttname"><a href="pbuf_8h.html#a6772c16662bbb78597399add086500c0">PBUF_FLAG_LLBCAST</a></div><div class="ttdeci">#define PBUF_FLAG_LLBCAST</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00135">pbuf.h:135</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="aicmp_8h_html_a058d0a0769bd38db99fc6fd1dad1324aa827a1f8705826a6cc3c22e2571acf02c"><div class="ttname"><a href="icmp_8h.html#a058d0a0769bd38db99fc6fd1dad1324aa827a1f8705826a6cc3c22e2571acf02c">ICMP_TE_TTL</a></div><div class="ttdef"><b>Definition:</b> <a href="icmp_8h_source.html#l00073">icmp.h:73</a></div></div>
<div class="ttc" id="alwipopts_8h_html_aa2b1f736373cd896e212644aa453fbaf"><div class="ttname"><a href="lwipopts_8h.html#aa2b1f736373cd896e212644aa453fbaf">LWIP_HAVE_LOOPIF</a></div><div class="ttdeci">#define LWIP_HAVE_LOOPIF</div><div class="ttdef"><b>Definition:</b> <a href="lwipopts_8h_source.html#l00231">lwipopts.h:231</a></div></div>
<div class="ttc" id="agroup__infrastructure__errors_html_ggae2e66c7d13afc90ffecd6151680fbadca05c91366f1b5203a5db9a241b415cd63"><div class="ttname"><a href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadca05c91366f1b5203a5db9a241b415cd63">ERR_BUF</a></div><div class="ttdef"><b>Definition:</b> <a href="err_8h_source.html#l00067">err.h:67</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_ga77570ac4fcab86864fa1916e55676da2"><div class="ttname"><a href="group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a></div><div class="ttdeci">uint16_t u16_t</div><div class="ttdef"><b>Definition:</b> <a href="arch_8h_source.html#l00124">arch.h:124</a></div></div>
<div class="ttc" id="astring_8h_html"><div class="ttname"><a href="string_8h.html">string.h</a></div></div>
<div class="ttc" id="aperf_8h_html_aa1d6977095e51331f65dcfb2b076da52"><div class="ttname"><a href="perf_8h.html#aa1d6977095e51331f65dcfb2b076da52">PERF_START</a></div><div class="ttdeci">#define PERF_START</div><div class="ttdef"><b>Definition:</b> <a href="perf_8h_source.html#l00020">perf.h:20</a></div></div>
<div class="ttc" id="aigmp_8h_html"><div class="ttname"><a href="igmp_8h.html">igmp.h</a></div></div>
<div class="ttc" id="astructip__globals_html_a17004526e6f1a164c0bab01aeac5e34a"><div class="ttname"><a href="structip__globals.html#a17004526e6f1a164c0bab01aeac5e34a">ip_globals::current_ip_header_tot_len</a></div><div class="ttdeci">u16_t current_ip_header_tot_len</div><div class="ttdef"><b>Definition:</b> <a href="ip_8h_source.html#l00120">ip.h:120</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="aautoip_8h_html"><div class="ttname"><a href="autoip_8h.html">autoip.h</a></div></div>
<div class="ttc" id="astructpbuf_html_a5259e7ec29bab9c0999b64f2e86b411f"><div class="ttname"><a href="structpbuf.html#a5259e7ec29bab9c0999b64f2e86b411f">pbuf::tot_len</a></div><div class="ttdeci">u16_t tot_len</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00156">pbuf.h:156</a></div></div>
<div class="ttc" id="aprot_2ip4_8h_html_a3b2c57b6a9dc9cc32fc2f145a96bbf8f"><div class="ttname"><a href="prot_2ip4_8h.html#a3b2c57b6a9dc9cc32fc2f145a96bbf8f">IPH_ID_SET</a></div><div class="ttdeci">#define IPH_ID_SET(hdr, id)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00116">ip4.h:116</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_ga4c14294869aceba3ef9d4c0c302d0f33"><div class="ttname"><a href="group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a></div><div class="ttdeci">uint32_t u32_t</div><div class="ttdef"><b>Definition:</b> <a href="arch_8h_source.html#l00126">arch.h:126</a></div></div>
<div class="ttc" id="apbuf_8h_html_ab8ad153151a8c157335d9c0cedc007e6"><div class="ttname"><a href="pbuf_8h.html#ab8ad153151a8c157335d9c0cedc007e6">PBUF_FLAG_MCASTLOOP</a></div><div class="ttdeci">#define PBUF_FLAG_MCASTLOOP</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00133">pbuf.h:133</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="agroup__debugging__levels_html_ga988147559b78642ac881815b66023646"><div class="ttname"><a href="group__debugging__levels.html#ga988147559b78642ac881815b66023646">LWIP_DBG_TRACE</a></div><div class="ttdeci">#define LWIP_DBG_TRACE</div><div class="ttdef"><b>Definition:</b> <a href="debug_8h_source.html#l00083">debug.h:83</a></div></div>
<div class="ttc" id="aip_8h_html_ac944fb6564f181bc90bc7c2b8b00d94c"><div class="ttname"><a href="ip_8h.html#ac944fb6564f181bc90bc7c2b8b00d94c">ip_data</a></div><div class="ttdeci">struct ip_globals ip_data</div></div>
<div class="ttc" id="araw_8h_html"><div class="ttname"><a href="raw_8h.html">raw.h</a></div></div>
<div class="ttc" id="astats_8h_html_af0a2079f449ce75c1eb49b8a5c922de8"><div class="ttname"><a href="stats_8h.html#af0a2079f449ce75c1eb49b8a5c922de8">IP_STATS_INC</a></div><div class="ttdeci">#define IP_STATS_INC(x)</div><div class="ttdef"><b>Definition:</b> <a href="stats_8h_source.html#l00360">stats.h:360</a></div></div>
<div class="ttc" id="astructnetif_html_a1c171db6097bbb6f09f63549a66e00ea"><div class="ttname"><a href="structnetif.html#a1c171db6097bbb6f09f63549a66e00ea">netif::flags</a></div><div class="ttdeci">u8_t flags</div><div class="ttdef"><b>Definition:</b> <a href="netif_8h_source.html#l00313">netif.h:313</a></div></div>
<div class="ttc" id="aarmv6_2kpanic_8c_html_adb9a182aa071791a306163d50d653deb"><div class="ttname"><a href="armv6_2kpanic_8c.html#adb9a182aa071791a306163d50d653deb">kpanic</a></div><div class="ttdeci">void kpanic(const char *fmt,...)</div><div class="ttdoc">print panic message and halt system</div><div class="ttdef"><b>Definition:</b> <a href="armv6_2kpanic_8c_source.html#l00041">kpanic.c:41</a></div></div>
<div class="ttc" id="anetif_8h_html_ae1c22f1dab74a84d9e31316fd5fdfa11"><div class="ttname"><a href="netif_8h.html#ae1c22f1dab74a84d9e31316fd5fdfa11">NETIF_SET_HWADDRHINT</a></div><div class="ttdeci">#define NETIF_SET_HWADDRHINT(netif, hint)</div><div class="ttdef"><b>Definition:</b> <a href="netif_8h_source.html#l00475">netif.h:475</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="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="astructpbuf_html_aa4d1af2cab3d9280d29212095b5b872a"><div class="ttname"><a href="structpbuf.html#aa4d1af2cab3d9280d29212095b5b872a">pbuf::flags</a></div><div class="ttdeci">u8_t flags</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00165">pbuf.h:165</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="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="agroup__debugging__levels_html_ga0269bdc51f1e8a5ecf9af72c6e1c996c"><div class="ttname"><a href="group__debugging__levels.html#ga0269bdc51f1e8a5ecf9af72c6e1c996c">LWIP_DBG_LEVEL_SERIOUS</a></div><div class="ttdeci">#define LWIP_DBG_LEVEL_SERIOUS</div><div class="ttdef"><b>Definition:</b> <a href="debug_8h_source.html#l00057">debug.h:57</a></div></div>
<div class="ttc" id="anetif_8h_html"><div class="ttname"><a href="netif_8h.html">netif.h</a></div></div>
<div class="ttc" id="aprot_2ip4_8h_html_a05a9e8ecf4eff38244b4c13c7e70094c"><div class="ttname"><a href="prot_2ip4_8h.html#a05a9e8ecf4eff38244b4c13c7e70094c">IPH_V</a></div><div class="ttdeci">#define IPH_V(hdr)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00102">ip4.h:102</a></div></div>
<div class="ttc" id="aprot_2ip_8h_html_a634284ee3a136d6ad61bc5d917ebb82f"><div class="ttname"><a href="prot_2ip_8h.html#a634284ee3a136d6ad61bc5d917ebb82f">IP_PROTO_TCP</a></div><div class="ttdeci">#define IP_PROTO_TCP</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip_8h_source.html#l00046">ip.h:46</a></div></div>
<div class="ttc" id="astructnetif_html_ab7ef01e505dd2feb781fe86756b1c973"><div class="ttname"><a href="structnetif.html#ab7ef01e505dd2feb781fe86756b1c973">netif::num</a></div><div class="ttdeci">u8_t num</div><div class="ttdef"><b>Definition:</b> <a href="netif_8h_source.html#l00317">netif.h:317</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="anetif_8h_html_a780be4c3fa9f7f2534f7865666c3a1b8"><div class="ttname"><a href="netif_8h.html#a780be4c3fa9f7f2534f7865666c3a1b8">netif_is_link_up</a></div><div class="ttdeci">#define netif_is_link_up(netif)</div><div class="ttdef"><b>Definition:</b> <a href="netif_8h_source.html#l00421">netif.h:421</a></div></div>
<div class="ttc" id="apbuf_8h_html_ac0d56cde47aca24ef410d730d7c89887"><div class="ttname"><a href="pbuf_8h.html#ac0d56cde47aca24ef410d730d7c89887">PBUF_FLAG_LLMCAST</a></div><div class="ttdeci">#define PBUF_FLAG_LLMCAST</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8h_source.html#l00137">pbuf.h:137</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="aprot_2ip_8h_html_aacaea7b8c4c8a5229c02b653766b4793"><div class="ttname"><a href="prot_2ip_8h.html#aacaea7b8c4c8a5229c02b653766b4793">IP_PROTO_ICMP</a></div><div class="ttdeci">#define IP_PROTO_ICMP</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip_8h_source.html#l00042">ip.h:42</a></div></div>
<div class="ttc" id="aicmp_8h_html_a17637465f209385e5d19ef47fd9266a5a8be2bc49d42aa1a6ee1da93a8700ef5f"><div class="ttname"><a href="icmp_8h.html#a17637465f209385e5d19ef47fd9266a5a8be2bc49d42aa1a6ee1da93a8700ef5f">ICMP_DUR_FRAG</a></div><div class="ttdef"><b>Definition:</b> <a href="icmp_8h_source.html#l00065">icmp.h:65</a></div></div>
<div class="ttc" id="atcp__priv_8h_html"><div class="ttname"><a href="tcp__priv_8h.html">tcp_priv.h</a></div></div>
<div class="ttc" id="astructip__globals_html_a7da899c663b1d560b61d92ba6d544701"><div class="ttname"><a href="structip__globals.html#a7da899c663b1d560b61d92ba6d544701">ip_globals::current_input_netif</a></div><div class="ttdeci">struct netif * current_input_netif</div><div class="ttdef"><b>Definition:</b> <a href="ip_8h_source.html#l00110">ip.h:110</a></div></div>
<div class="ttc" id="aicmp_8h_html_a17637465f209385e5d19ef47fd9266a5a3c7bbd13b613990413ef167017dfbcef"><div class="ttname"><a href="icmp_8h.html#a17637465f209385e5d19ef47fd9266a5a3c7bbd13b613990413ef167017dfbcef">ICMP_DUR_PROTO</a></div><div class="ttdef"><b>Definition:</b> <a href="icmp_8h_source.html#l00061">icmp.h:61</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="agroup__pbuf_html_ga50abfe830a33a1a47a562febee66015d"><div class="ttname"><a href="group__pbuf.html#ga50abfe830a33a1a47a562febee66015d">pbuf_realloc</a></div><div class="ttdeci">void pbuf_realloc(struct pbuf *p, u16_t size)</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8c_source.html#l00493">pbuf.c:493</a></div></div>
<div class="ttc" id="astructip__globals_html_a04d85a3dc2c417050b3e088fa58a74b0"><div class="ttname"><a href="structip__globals.html#a04d85a3dc2c417050b3e088fa58a74b0">ip_globals::current_iphdr_src</a></div><div class="ttdeci">ip_addr_t current_iphdr_src</div><div class="ttdef"><b>Definition:</b> <a href="ip_8h_source.html#l00122">ip.h:122</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="adef_8c_html_a14f94347a5b9b9e3602705b75b7ae524"><div class="ttname"><a href="def_8c.html#a14f94347a5b9b9e3602705b75b7ae524">lwip_htonl</a></div><div class="ttdeci">u32_t lwip_htonl(u32_t n)</div><div class="ttdef"><b>Definition:</b> <a href="def_8c_source.html#l00088">def.c:88</a></div></div>
<div class="ttc" id="astructnetif_html_a32fca6ffd28bb9af3f891a378827a67e"><div class="ttname"><a href="structnetif.html#a32fca6ffd28bb9af3f891a378827a67e">netif::name</a></div><div class="ttdeci">char name[2]</div><div class="ttdef"><b>Definition:</b> <a href="netif_8h_source.html#l00315">netif.h:315</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="adef_8c_html_ad637280639de4066392e6b5614fa3e56"><div class="ttname"><a href="def_8c.html#ad637280639de4066392e6b5614fa3e56">lwip_htons</a></div><div class="ttdeci">u16_t lwip_htons(u16_t n)</div><div class="ttdef"><b>Definition:</b> <a href="def_8c_source.html#l00075">def.c:75</a></div></div>
<div class="ttc" id="aprot_2ip4_8h_html_a13fb5476ab97db9c5de6c1f5ca0d82e6"><div class="ttname"><a href="prot_2ip4_8h.html#a13fb5476ab97db9c5de6c1f5ca0d82e6">IPH_TOS</a></div><div class="ttdeci">#define IPH_TOS(hdr)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00104">ip4.h:104</a></div></div>
<div class="ttc" id="astructnetif_html_ae77736b64df442242795220d76be6b86"><div class="ttname"><a href="structnetif.html#ae77736b64df442242795220d76be6b86">netif::next</a></div><div class="ttdeci">struct netif * next</div><div class="ttdef"><b>Definition:</b> <a href="netif_8h_source.html#l00235">netif.h:235</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="aprot_2ip4_8h_html_a037908f4291c62a7336362506cea01af"><div class="ttname"><a href="prot_2ip4_8h.html#a037908f4291c62a7336362506cea01af">IPH_VHL_SET</a></div><div class="ttdeci">#define IPH_VHL_SET(hdr, v, hl)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00113">ip4.h:113</a></div></div>
<div class="ttc" id="aprot_2ip4_8h_html_aa2de6f9d35337b4be67d799805665e11"><div class="ttname"><a href="prot_2ip4_8h.html#aa2de6f9d35337b4be67d799805665e11">IPH_PROTO</a></div><div class="ttdeci">#define IPH_PROTO(hdr)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00109">ip4.h:109</a></div></div>
<div class="ttc" id="anetif_8h_html_a1c8141eaa98f6dc6dfddbb23a706656c"><div class="ttname"><a href="netif_8h.html#a1c8141eaa98f6dc6dfddbb23a706656c">netif_list</a></div><div class="ttdeci">struct netif * netif_list</div><div class="ttdef"><b>Definition:</b> <a href="netif_8c_source.html#l00104">netif.c:104</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="aprot_2dhcp_8h_html"><div class="ttname"><a href="prot_2dhcp_8h.html">dhcp.h</a></div></div>
<div class="ttc" id="aprot_2ip_8h_html_a3ef2b8a1cb4f7acee3142337438dfd0d"><div class="ttname"><a href="prot_2ip_8h.html#a3ef2b8a1cb4f7acee3142337438dfd0d">IP_PROTO_UDPLITE</a></div><div class="ttdeci">#define IP_PROTO_UDPLITE</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip_8h_source.html#l00045">ip.h:45</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="aip_8h_html"><div class="ttname"><a href="ip_8h.html">ip.h</a></div></div>
<div class="ttc" id="aprot_2ip4_8h_html_af4e4d0cbbb1de541eea2b53b91e8b172"><div class="ttname"><a href="prot_2ip4_8h.html#af4e4d0cbbb1de541eea2b53b91e8b172">IPH_TOS_SET</a></div><div class="ttdeci">#define IPH_TOS_SET(hdr, tos)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00114">ip4.h:114</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_a0d8238411ce35a007170f652e62209b3"><div class="ttname"><a href="prot_2ip4_8h.html#a0d8238411ce35a007170f652e62209b3">IPH_TTL</a></div><div class="ttdeci">#define IPH_TTL(hdr)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00108">ip4.h:108</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="aprot_2ip4_8h_html_ae2473f4a88d141d5298f92a4335b714a"><div class="ttname"><a href="prot_2ip4_8h.html#ae2473f4a88d141d5298f92a4335b714a">IP_DF</a></div><div class="ttdeci">#define IP_DF</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00083">ip4.h:83</a></div></div>
<div class="ttc" id="audp_8h_html"><div class="ttname"><a href="udp_8h.html">udp.h</a></div></div>
<div class="ttc" id="aprot_2ip_8h_html_a4f8609139fce15ace0c6d117021e29a4"><div class="ttname"><a href="prot_2ip_8h.html#a4f8609139fce15ace0c6d117021e29a4">IP_PROTO_IGMP</a></div><div class="ttdeci">#define IP_PROTO_IGMP</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip_8h_source.html#l00043">ip.h:43</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="astructip__globals_html_a0b4e54250c692c638408de54593d2aa1"><div class="ttname"><a href="structip__globals.html#a0b4e54250c692c638408de54593d2aa1">ip_globals::current_iphdr_dest</a></div><div class="ttdeci">ip_addr_t current_iphdr_dest</div><div class="ttdef"><b>Definition:</b> <a href="ip_8h_source.html#l00124">ip.h:124</a></div></div>
<div class="ttc" id="alwipopts_8h_html_aa1dd57a66b6de8c0593e9e3e8d1411f6"><div class="ttname"><a href="lwipopts_8h.html#aa1dd57a66b6de8c0593e9e3e8d1411f6">MEMCPY</a></div><div class="ttdeci">#define MEMCPY(dst, src, len)</div><div class="ttdef"><b>Definition:</b> <a href="lwipopts_8h_source.html#l00043">lwipopts.h:43</a></div></div>
<div class="ttc" id="agroup__debugging__levels_html_ga77c491e468bf7d9a1bc48430c1866a96"><div class="ttname"><a href="group__debugging__levels.html#ga77c491e468bf7d9a1bc48430c1866a96">LWIP_DBG_LEVEL_WARNING</a></div><div class="ttdeci">#define LWIP_DBG_LEVEL_WARNING</div><div class="ttdef"><b>Definition:</b> <a href="debug_8h_source.html#l00055">debug.h:55</a></div></div>
<div class="ttc" id="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="alwipopts_8h_html_a724a0ea765d5a47d026d529725f31c01"><div class="ttname"><a href="lwipopts_8h.html#a724a0ea765d5a47d026d529725f31c01">LWIP_NETIF_LOOPBACK</a></div><div class="ttdeci">#define LWIP_NETIF_LOOPBACK</div><div class="ttdef"><b>Definition:</b> <a href="lwipopts_8h_source.html#l00235">lwipopts.h:235</a></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="aprot_2ip4_8h_html_a49753f7668f741b1877340bff6fb97c3"><div class="ttname"><a href="prot_2ip4_8h.html#a49753f7668f741b1877340bff6fb97c3">IPH_PROTO_SET</a></div><div class="ttdeci">#define IPH_PROTO_SET(hdr, proto)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00119">ip4.h:119</a></div></div>
<div class="ttc" id="astructnet_html"><div class="ttname"><a href="structnet.html">net</a></div><div class="ttdef"><b>Definition:</b> <a href="device_8old_8h_source.html#l00042">device.old.h:42</a></div></div>
<div class="ttc" id="aip_8h_html_a2b7dff1859ced5f2be3fc3da231819d7"><div class="ttname"><a href="ip_8h.html#a2b7dff1859ced5f2be3fc3da231819d7">LWIP_IP_HDRINCL</a></div><div class="ttdeci">#define LWIP_IP_HDRINCL</div><div class="ttdef"><b>Definition:</b> <a href="ip_8h_source.html#l00058">ip.h:58</a></div></div>
<div class="ttc" id="alwipopts_8h_html_a5d3348778951e7bc5cd397c6575eef3a"><div class="ttname"><a href="lwipopts_8h.html#a5d3348778951e7bc5cd397c6575eef3a">IP_DEBUG</a></div><div class="ttdeci">#define IP_DEBUG</div><div class="ttdef"><b>Definition:</b> <a href="lwipopts_8h_source.html#l00449">lwipopts.h:449</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_gac219830a93d05c5f18f64ce87a34be14"><div class="ttname"><a href="group__compiler__abstraction.html#gac219830a93d05c5f18f64ce87a34be14">X32_F</a></div><div class="ttdeci">#define X32_F</div><div class="ttdef"><b>Definition:</b> <a href="arch_8h_source.html#l00163">arch.h:163</a></div></div>
<div class="ttc" id="apbuf_8h_html_a27480c41c34021d4417691d327163626"><div class="ttname"><a href="pbuf_8h.html#a27480c41c34021d4417691d327163626">pbuf_header_force</a></div><div class="ttdeci">u8_t pbuf_header_force(struct pbuf *p, s16_t header_size)</div><div class="ttdef"><b>Definition:</b> <a href="pbuf_8c_source.html#l00675">pbuf.c:675</a></div></div>
<div class="ttc" id="amem_8h_html"><div class="ttname"><a href="mem_8h.html">mem.h</a></div></div>
<div class="ttc" id="adef_8h_html_afea9c21aa1f56180cdf6fb42ef14a294"><div class="ttname"><a href="def_8h.html#afea9c21aa1f56180cdf6fb42ef14a294">PP_HTONL</a></div><div class="ttdeci">#define PP_HTONL(x)</div><div class="ttdef"><b>Definition:</b> <a href="def_8h_source.html#l00081">def.h:81</a></div></div>
<div class="ttc" id="aip_8h_html_a355679dba1c0d8ef07ce3abcd28e3063"><div class="ttname"><a href="ip_8h.html#a355679dba1c0d8ef07ce3abcd28e3063">LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX</a></div><div class="ttdeci">#define LWIP_IP_CHECK_PBUF_REF_COUNT_FOR_TX(p)</div><div class="ttdef"><b>Definition:</b> <a href="ip_8h_source.html#l00063">ip.h:63</a></div></div>
<div class="ttc" id="agroup__infrastructure__errors_html_ggae2e66c7d13afc90ffecd6151680fbadca9448893187313c0c5a502ca9a9ad1c2a"><div class="ttname"><a href="group__infrastructure__errors.html#ggae2e66c7d13afc90ffecd6151680fbadca9448893187313c0c5a502ca9a9ad1c2a">ERR_RTE</a></div><div class="ttdef"><b>Definition:</b> <a href="err_8h_source.html#l00071">err.h:71</a></div></div>
<div class="ttc" id="astructip__globals_html_a7803dc5950d143e4433a0df689989bab"><div class="ttname"><a href="structip__globals.html#a7803dc5950d143e4433a0df689989bab">ip_globals::current_netif</a></div><div class="ttdeci">struct netif * current_netif</div><div class="ttdef"><b>Definition:</b> <a href="ip_8h_source.html#l00108">ip.h:108</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_a773b96f54c75b35bcd24e7f857fcf988"><div class="ttname"><a href="prot_2ip4_8h.html#a773b96f54c75b35bcd24e7f857fcf988">IPH_CHKSUM</a></div><div class="ttdeci">#define IPH_CHKSUM(hdr)</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip4_8h_source.html#l00110">ip4.h:110</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="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="agroup__netif_html_ga94a4c24c988afc0a577387730f303b19"><div class="ttname"><a href="group__netif.html#ga94a4c24c988afc0a577387730f303b19">netif_is_up</a></div><div class="ttdeci">#define netif_is_up(netif)</div><div class="ttdef"><b>Definition:</b> <a href="netif_8h_source.html#l00409">netif.h:409</a></div></div>
<div class="ttc" id="aprot_2ip_8h_html_a76212e7ef71a99646040d2e454388bed"><div class="ttname"><a href="prot_2ip_8h.html#a76212e7ef71a99646040d2e454388bed">IP_PROTO_UDP</a></div><div class="ttdeci">#define IP_PROTO_UDP</div><div class="ttdef"><b>Definition:</b> <a href="prot_2ip_8h_source.html#l00044">ip.h:44</a></div></div>
<div class="ttc" id="adef_8h_html_a0dfd02d7c09f9c698a5a7ecc0b7287ad"><div class="ttname"><a href="def_8h.html#a0dfd02d7c09f9c698a5a7ecc0b7287ad">PP_HTONS</a></div><div class="ttdeci">#define PP_HTONS(x)</div><div class="ttdef"><b>Definition:</b> <a href="def_8h_source.html#l00079">def.h:79</a></div></div>
<div class="ttc" id="agroup__netif__flags_html_gaef64fe15c82bc7b235366923e517104e"><div class="ttname"><a href="group__netif__flags.html#gaef64fe15c82bc7b235366923e517104e">NETIF_FLAG_BROADCAST</a></div><div class="ttdeci">#define NETIF_FLAG_BROADCAST</div><div class="ttdef"><b>Definition:</b> <a href="netif_8h_source.html#l00089">netif.h:89</a></div></div>
<div class="ttc" id="anetif_8h_html_a3d0925cbce550ed461907aee816713ba"><div class="ttname"><a href="netif_8h.html#a3d0925cbce550ed461907aee816713ba">netif_default</a></div><div class="ttdeci">struct netif * netif_default</div><div class="ttdef"><b>Definition:</b> <a href="netif_8c_source.html#l00105">netif.c:105</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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