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<div class="title">netdb.h</div> </div>
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<a href="../../d4/d63/netdb_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="l00006"></a><span class="lineno"> 6</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without modification,</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * are permitted provided that the following conditions are met:</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"> * 1. Redistributions of source code must retain the above copyright notice,</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * this list of conditions and the following disclaimer.</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright notice,</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * this list of conditions and the following disclaimer in the documentation</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * and/or other materials provided with the distribution.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</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="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * derived from this software without specific prior written permission.</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</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="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</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="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * This file is part of the lwIP TCP/IP stack.</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * Author: Simon Goldschmidt</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"> */</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#ifndef LWIP_HDR_NETDB_H</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#define LWIP_HDR_NETDB_H</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include "<a class="code" href="../../dc/dba/opt_8h.html">net/opt.h</a>"</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  </div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#if LWIP_DNS && LWIP_SOCKET</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="../../d2/d2d/arch_8h.html">net/arch.h</a>"</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#include "<a class="code" href="../../d6/d4a/inet_8h.html">net/inet.h</a>"</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#include "<a class="code" href="../../d4/dd3/sockets_8h.html">net/sockets.h</a>"</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">#ifdef __cplusplus</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="keyword">extern</span> <span class="stringliteral">"C"</span> {</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  </div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">/* some rarely used options */</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#ifndef LWIP_DNS_API_DECLARE_H_ERRNO</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#define LWIP_DNS_API_DECLARE_H_ERRNO 1</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  </div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#ifndef LWIP_DNS_API_DEFINE_ERRORS</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor">#define LWIP_DNS_API_DEFINE_ERRORS 1</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  </div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor">#ifndef LWIP_DNS_API_DEFINE_FLAGS</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor">#define LWIP_DNS_API_DEFINE_FLAGS 1</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor">#endif</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">#ifndef LWIP_DNS_API_DECLARE_STRUCTS</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#define LWIP_DNS_API_DECLARE_STRUCTS 1</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="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor">#if LWIP_DNS_API_DEFINE_ERRORS</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  </div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#define EAI_NONAME 200</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">#define EAI_SERVICE 201</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#define EAI_FAIL 202</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor">#define EAI_MEMORY 203</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor">#define EAI_FAMILY 204</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  </div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor">#define HOST_NOT_FOUND 210</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="preprocessor">#define NO_DATA 211</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="preprocessor">#define NO_RECOVERY 212</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor">#define TRY_AGAIN 213</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_DNS_API_DEFINE_ERRORS */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  </div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="preprocessor">#if LWIP_DNS_API_DEFINE_FLAGS</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment">/* input flags for struct addrinfo */</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor">#define AI_PASSIVE 0x01</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor">#define AI_CANONNAME 0x02</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor">#define AI_NUMERICHOST 0x04</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor">#define AI_NUMERICSERV 0x08</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor">#define AI_V4MAPPED 0x10</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor">#define AI_ALL 0x20</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="preprocessor">#define AI_ADDRCONFIG 0x40</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_DNS_API_DEFINE_FLAGS */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  </div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor">#if LWIP_DNS_API_DECLARE_STRUCTS</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="keyword">struct </span>hostent {</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordtype">char</span> *h_name; <span class="comment">/* Official name of the host. */</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordtype">char</span> **h_aliases; <span class="comment">/* A pointer to an array of pointers to alternative host names,</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment"> terminated by a null pointer. */</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordtype">int</span> h_addrtype; <span class="comment">/* Address type. */</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordtype">int</span> h_length; <span class="comment">/* The length, in bytes, of the address. */</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordtype">char</span> **h_addr_list; <span class="comment">/* A pointer to an array of pointers to network addresses (in</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"> network byte order) for the host, terminated by a null pointer. */</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="preprocessor">#define h_addr h_addr_list[0] </span><span class="comment">/* for backward compatibility */</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>  </div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="keyword">struct </span>addrinfo {</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordtype">int</span> ai_flags; <span class="comment">/* Input flags. */</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordtype">int</span> ai_family; <span class="comment">/* Address family of socket. */</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordtype">int</span> ai_socktype; <span class="comment">/* Socket type. */</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordtype">int</span> ai_protocol; <span class="comment">/* Protocol of socket. */</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  socklen_t ai_addrlen; <span class="comment">/* Length of socket address. */</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keyword">struct </span>sockaddr *ai_addr; <span class="comment">/* Socket address of socket. */</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordtype">char</span> *ai_canonname; <span class="comment">/* Canonical name of service location. */</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keyword">struct </span>addrinfo *ai_next; <span class="comment">/* Pointer to next in list. */</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> };</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_DNS_API_DECLARE_STRUCTS */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  </div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="preprocessor">#define NETDB_ELEM_SIZE (sizeof(struct addrinfo) + sizeof(struct sockaddr_storage) + DNS_MAX_NAME_LENGTH + 1)</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  </div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="preprocessor">#if LWIP_DNS_API_DECLARE_H_ERRNO</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment">/* application accessible error code set by the DNS API functions */</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="keyword">extern</span> <span class="keywordtype">int</span> h_errno;</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_DNS_API_DECLARE_H_ERRNO*/</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  </div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="keyword">struct </span>hostent *lwip_gethostbyname(<span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="../../d1/de8/pci_8c.html#a8f8f80d37794cde9472343e4487ba3eb">name</a>);</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="keywordtype">int</span> lwip_gethostbyname_r(<span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="../../d1/de8/pci_8c.html#a8f8f80d37794cde9472343e4487ba3eb">name</a>, <span class="keyword">struct</span> hostent *ret, <span class="keywordtype">char</span> *<a class="code" href="../../d9/dd0/structbuf.html">buf</a>,</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordtype">size_t</span> buflen, <span class="keyword">struct</span> hostent **result, <span class="keywordtype">int</span> *h_errnop);</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="keywordtype">void</span> lwip_freeaddrinfo(<span class="keyword">struct</span> addrinfo *ai);</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="keywordtype">int</span> lwip_getaddrinfo(<span class="keyword">const</span> <span class="keywordtype">char</span> *nodename,</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *servname,</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keyword">const</span> <span class="keyword">struct</span> addrinfo *hints,</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keyword">struct</span> addrinfo **res);</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="preprocessor">#if LWIP_COMPAT_SOCKETS</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  </div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="preprocessor">#define gethostbyname(name) lwip_gethostbyname(name)</span></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">#define gethostbyname_r(name, ret, buf, buflen, result, h_errnop) \</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="preprocessor"> lwip_gethostbyname_r(name, ret, buf, buflen, result, h_errnop)</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="preprocessor">#define freeaddrinfo(addrinfo) lwip_freeaddrinfo(addrinfo)</span></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">#define getaddrinfo(nodname, servname, hints, res) \</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="preprocessor"> lwip_getaddrinfo(nodname, servname, hints, res)</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_COMPAT_SOCKETS */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  </div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> }</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  </div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_DNS && LWIP_SOCKET */</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">#endif </span><span class="comment">/* LWIP_HDR_NETDB_H */</span><span class="preprocessor"></span></div>
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