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<div class="title">udp.h</div> </div>
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<a href="../../d2/da7/udp_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>  </div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * Copyright (c) 2001-2004 Swedish Institute of Computer Science.</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without modification,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * are permitted provided that the following conditions are met:</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * 1. Redistributions of source code must retain the above copyright notice,</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * this list of conditions and the following disclaimer.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright notice,</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * this list of conditions and the following disclaimer in the documentation</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * and/or other materials provided with the distribution.</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * 3. The name of the author may not be used to endorse or promote products</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * derived from this software without specific prior written permission.</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * This file is part of the lwIP TCP/IP stack.</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * Author: Adam Dunkels <adam@sics.se></span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#ifndef LWIP_HDR_UDP_H</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#define LWIP_HDR_UDP_H</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="../../dc/dba/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_UDP </span><span class="comment">/* don't build if not configured for use in lwipopts.h */</span><span class="preprocessor"></span></div>
<div class="line"><a name="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="../../d0/d35/pbuf_8h.html">net/pbuf.h</a>"</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#include "<a class="code" href="../../d9/d69/netif_8h.html">net/netif.h</a>"</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#include "<a class="code" href="../../de/df7/ip__addr_8h.html">net/ip_addr.h</a>"</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor">#include "<a class="code" href="../../da/d2f/ip_8h.html">net/ip.h</a>"</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#include "<a class="code" href="../../d3/d7d/ip6__addr_8h.html">net/ip6_addr.h</a>"</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#include "<a class="code" href="../../d3/d09/prot_2udp_8h.html">net/prot/udp.h</a>"</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="keyword">extern</span> <span class="stringliteral">"C"</span> {</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  </div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#define UDP_FLAGS_NOCHKSUM 0x01U</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#define UDP_FLAGS_UDPLITE 0x02U</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor">#define UDP_FLAGS_CONNECTED 0x04U</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor">#define UDP_FLAGS_MULTICAST_LOOP 0x08U</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  </div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="keyword">struct </span>udp_pcb;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  </div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="keyword">typedef</span> void (*udp_recv_fn)(<span class="keywordtype">void</span> *arg, <span class="keyword">struct </span>udp_pcb *pcb, <span class="keyword">struct </span><a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *p,</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">const</span> <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a> *addr, <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> port);</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  </div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="keyword">struct </span>udp_pcb {</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <a class="code" href="../../da/d2f/ip_8h.html#a8bdf4b5f674375e76cdd968826d80e53">IP_PCB</a>;</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  </div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment">/* Protocol specific PCB members */</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  </div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keyword">struct </span>udp_pcb *next;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  </div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> flags;</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> local_port, remote_port;</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  </div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="preprocessor">#if LWIP_MULTICAST_TX_OPTIONS</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  </div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a> multicast_ip;</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> mcast_ttl;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_MULTICAST_TX_OPTIONS */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  </div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="preprocessor">#if LWIP_UDPLITE</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>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> chksum_len_rx, chksum_len_tx;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_UDPLITE */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  </div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  udp_recv_fn recv;</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordtype">void</span> *recv_arg;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> };</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment">/* udp_pcbs export for external reference (e.g. SNMP agent) */</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="keyword">extern</span> <span class="keyword">struct </span>udp_pcb *udp_pcbs;</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  </div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment">/* The following functions is the application layer interface to the</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> UDP code. */</span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="keyword">struct </span>udp_pcb * udp_new (<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="keyword">struct </span>udp_pcb * udp_new_ip_type(<a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> type);</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="keywordtype">void</span> udp_remove (<span class="keyword">struct</span> udp_pcb *pcb);</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <a class="code" href="../../d2/de7/group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> udp_bind (<span class="keyword">struct</span> udp_pcb *pcb, <span class="keyword">const</span> <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a> *ipaddr,</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> port);</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <a class="code" href="../../d2/de7/group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> udp_connect (<span class="keyword">struct</span> udp_pcb *pcb, <span class="keyword">const</span> <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a> *ipaddr,</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> port);</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="keywordtype">void</span> udp_disconnect (<span class="keyword">struct</span> udp_pcb *pcb);</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="keywordtype">void</span> udp_recv (<span class="keyword">struct</span> udp_pcb *pcb, udp_recv_fn recv,</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordtype">void</span> *recv_arg);</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <a class="code" href="../../d2/de7/group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> udp_sendto_if (<span class="keyword">struct</span> udp_pcb *pcb, <span class="keyword">struct</span> <a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *p,</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keyword">const</span> <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a> *dst_ip, <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> dst_port,</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keyword">struct</span> <a class="code" href="../../d2/dd6/structnetif.html">netif</a> *<a class="code" href="../../d2/dd6/structnetif.html">netif</a>);</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <a class="code" href="../../d2/de7/group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> udp_sendto_if_src(<span class="keyword">struct</span> udp_pcb *pcb, <span class="keyword">struct</span> <a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *p,</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keyword">const</span> <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a> *dst_ip, <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> dst_port,</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keyword">struct</span> <a class="code" href="../../d2/dd6/structnetif.html">netif</a> *<a class="code" href="../../d2/dd6/structnetif.html">netif</a>, <span class="keyword">const</span> <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a> *src_ip);</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <a class="code" href="../../d2/de7/group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> udp_sendto (<span class="keyword">struct</span> udp_pcb *pcb, <span class="keyword">struct</span> <a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *p,</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keyword">const</span> <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a> *dst_ip, <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> dst_port);</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <a class="code" href="../../d2/de7/group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> udp_send (<span class="keyword">struct</span> udp_pcb *pcb, <span class="keyword">struct</span> <a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *p);</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  </div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="preprocessor">#if LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <a class="code" href="../../d2/de7/group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> udp_sendto_if_chksum(<span class="keyword">struct</span> udp_pcb *pcb, <span class="keyword">struct</span> <a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *p,</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keyword">const</span> <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a> *dst_ip, <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> dst_port,</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keyword">struct</span> <a class="code" href="../../d2/dd6/structnetif.html">netif</a> *<a class="code" href="../../d2/dd6/structnetif.html">netif</a>, <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> have_chksum,</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> chksum);</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <a class="code" href="../../d2/de7/group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> udp_sendto_chksum(<span class="keyword">struct</span> udp_pcb *pcb, <span class="keyword">struct</span> <a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *p,</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keyword">const</span> <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a> *dst_ip, <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> dst_port,</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> have_chksum, <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> chksum);</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <a class="code" href="../../d2/de7/group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> udp_send_chksum(<span class="keyword">struct</span> udp_pcb *pcb, <span class="keyword">struct</span> <a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *p,</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> have_chksum, <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> chksum);</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <a class="code" href="../../d2/de7/group__infrastructure__errors.html#gaf02d9da80fd66b4f986d2c53d7231ddb">err_t</a> udp_sendto_if_src_chksum(<span class="keyword">struct</span> udp_pcb *pcb, <span class="keyword">struct</span> <a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *p,</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keyword">const</span> <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a> *dst_ip, <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> dst_port, <span class="keyword">struct</span> <a class="code" href="../../d2/dd6/structnetif.html">netif</a> *<a class="code" href="../../d2/dd6/structnetif.html">netif</a>,</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> have_chksum, <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga77570ac4fcab86864fa1916e55676da2">u16_t</a> chksum, <span class="keyword">const</span> <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a> *src_ip);</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_CHECKSUM_ON_COPY && CHECKSUM_GEN_UDP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  </div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="preprocessor">#define udp_flags(pcb) ((pcb)->flags)</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="preprocessor">#define udp_setflags(pcb, f) ((pcb)->flags = (f))</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  </div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment">/* The following functions are the lower layer interface to UDP. */</span></div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="keywordtype">void</span> udp_input (<span class="keyword">struct</span> <a class="code" href="../../d9/db8/structpbuf.html">pbuf</a> *p, <span class="keyword">struct</span> <a class="code" href="../../d2/dd6/structnetif.html">netif</a> *inp);</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  </div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="keywordtype">void</span> udp_init (<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  </div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment">/* for compatibility with older implementation */</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="preprocessor">#define udp_new_ip6() udp_new_ip_type(IPADDR_TYPE_V6)</span></div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  </div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="preprocessor">#if LWIP_MULTICAST_TX_OPTIONS</span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="preprocessor">#define udp_set_multicast_netif_addr(pcb, ip4addr) ip_addr_copy_from_ip4((pcb)->multicast_ip, *(ip4addr))</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="preprocessor">#define udp_get_multicast_netif_addr(pcb) ip_2_ip4(&(pcb)->multicast_ip)</span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="preprocessor">#define udp_set_multicast_ttl(pcb, value) do { (pcb)->mcast_ttl = value; } while(0)</span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="preprocessor">#define udp_get_multicast_ttl(pcb) ((pcb)->mcast_ttl)</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_MULTICAST_TX_OPTIONS */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  </div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="preprocessor">#if UDP_DEBUG</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="keywordtype">void</span> udp_debug_print(<span class="keyword">struct</span> <a class="code" href="../../da/d31/structudp__hdr.html">udp_hdr</a> *udphdr);</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="preprocessor">#define udp_debug_print(udphdr)</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  </div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="keywordtype">void</span> udp_netif_ip_addr_changed(<span class="keyword">const</span> <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a>* old_addr, <span class="keyword">const</span> <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a>* new_addr);</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  </div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="preprocessor">#ifdef __cplusplus</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> <span class="preprocessor">#endif</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">#endif </span><span class="comment">/* LWIP_UDP */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  </div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_HDR_UDP_H */</span><span class="preprocessor"></span></div>
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