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<div class="title">ip4_addr.c</div> </div>
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<a href="../../d6/d18/ip4__addr_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>  </div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * Copyright (c) 2001-2004 Swedish Institute of Computer Science.</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without modification,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * are permitted provided that the following conditions are met:</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * 1. Redistributions of source code must retain the above copyright notice,</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * this list of conditions and the following disclaimer.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright notice,</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * this list of conditions and the following disclaimer in the documentation</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * and/or other materials provided with the distribution.</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * 3. The name of the author may not be used to endorse or promote products</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * derived from this software without specific prior written permission.</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * This file is part of the lwIP TCP/IP stack.</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * Author: 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>  </div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</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="l00040"></a><span class="lineno"> 40</span>  </div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#if LWIP_IPV4</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">#include "<a class="code" href="../../de/df7/ip__addr_8h.html">net/ip_addr.h</a>"</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</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="l00045"></a><span class="lineno"> 45</span>  </div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment">/* used by IP4_ADDR_ANY and IP_ADDR_BROADCAST in ip_addr.h */</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="keyword">const</span> <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a> ip_addr_any = IPADDR4_INIT(IPADDR_ANY);</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="keyword">const</span> <a class="code" href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a> ip_addr_broadcast = IPADDR4_INIT(IPADDR_BROADCAST);</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  </div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> ip4_addr_isbroadcast_u32(<a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a> addr, <span class="keyword">const</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="l00059"></a><span class="lineno"> 59</span> {</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  ip4_addr_t ipaddr;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  ip4_addr_set_u32(&ipaddr, addr);</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  </div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="comment">/* all ones (broadcast) or all zeroes (old skool broadcast) */</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">if</span> ((~addr == IPADDR_ANY) ||</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  (addr == IPADDR_ANY)) {</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="comment">/* no broadcast support on this network interface? */</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((<a class="code" href="../../d2/dd6/structnetif.html">netif</a>-><a class="code" href="../../d2/dd6/structnetif.html#a1c171db6097bbb6f09f63549a66e00ea">flags</a> & <a class="code" href="../../d2/d32/group__netif__flags.html#gaef64fe15c82bc7b235366923e517104e">NETIF_FLAG_BROADCAST</a>) == 0) {</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">/* the given address cannot be a broadcast address</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"> * nor can we check against any broadcast addresses */</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="comment">/* address matches network interface address exactly? => no broadcast */</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (addr == ip4_addr_get_u32(netif_ip4_addr(<a class="code" href="../../d2/dd6/structnetif.html">netif</a>))) {</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="comment">/* on the same (sub) network... */</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (ip4_addr_netcmp(&ipaddr, netif_ip4_addr(<a class="code" href="../../d2/dd6/structnetif.html">netif</a>), netif_ip4_netmask(<a class="code" href="../../d2/dd6/structnetif.html">netif</a>))</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="comment">/* ...and host identifier bits are all ones? =>... */</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  && ((addr & ~ip4_addr_get_u32(netif_ip4_netmask(<a class="code" href="../../d2/dd6/structnetif.html">netif</a>))) ==</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  (IPADDR_BROADCAST & ~ip4_addr_get_u32(netif_ip4_netmask(<a class="code" href="../../d2/dd6/structnetif.html">netif</a>))))) {</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="comment">/* => network broadcast address */</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">return</span> 0;</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> }</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  </div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> ip4_addr_netmask_valid(<a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a> netmask)</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/d8c/group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a> mask;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a> nm_hostorder = <a class="code" href="../../d2/d6e/def_8c.html#a14f94347a5b9b9e3602705b75b7ae524">lwip_htonl</a>(netmask);</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  </div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="comment">/* first, check for the first zero */</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">for</span> (mask = 1UL << 31 ; mask != 0; mask >>= 1) {</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">if</span> ((nm_hostorder & mask) == 0) {</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">break</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>  }</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="comment">/* then check that there is no one */</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">for</span> (; mask != 0; mask >>= 1) {</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">if</span> ((nm_hostorder & mask) != 0) {</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="comment">/* there is a one after the first zero -> invalid */</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">return</span> 0;</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>  }</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="comment">/* no one after the first zero -> valid */</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</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="comment">/* Here for now until needed in other places in lwIP */</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="preprocessor">#ifndef isprint</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="preprocessor">#define in_range(c, lo, up) ((u8_t)c >= lo && (u8_t)c <= up)</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="preprocessor">#define isprint(c) in_range(c, 0x20, 0x7f)</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="preprocessor">#define isdigit(c) in_range(c, '0', '9')</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="preprocessor">#define isxdigit(c) (isdigit(c) || in_range(c, 'a', 'f') || in_range(c, 'A', 'F'))</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="preprocessor">#define islower(c) in_range(c, 'a', 'z')</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="preprocessor">#define isspace(c) (c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v')</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  </div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> ipaddr_addr(<span class="keyword">const</span> <span class="keywordtype">char</span> *cp)</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>  ip4_addr_t val;</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>  <span class="keywordflow">if</span> (ip4addr_aton(cp, &val)) {</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">return</span> ip4_addr_get_u32(&val);</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="keywordflow">return</span> (IPADDR_NONE);</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> }</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  </div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="keywordtype">int</span></div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> ip4addr_aton(<span class="keyword">const</span> <span class="keywordtype">char</span> *cp, ip4_addr_t *addr)</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> {</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a> val;</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> base;</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keywordtype">char</span> c;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a> parts[4];</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a> *pp = parts;</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>  c = *cp;</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">for</span> (;;) {</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment"> * Collect number up to ``.''.</span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="comment"> * Values are specified as for C:</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="comment"> * 0x=hex, 0=octal, 1-9=decimal.</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">if</span> (!isdigit(c)) {</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  }</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  val = 0;</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  base = 10;</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">if</span> (c == <span class="charliteral">'0'</span>) {</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  c = *++cp;</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordflow">if</span> (c == <span class="charliteral">'x'</span> || c == <span class="charliteral">'X'</span>) {</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  base = 16;</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  c = *++cp;</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  base = 8;</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  }</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  }</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordflow">for</span> (;;) {</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordflow">if</span> (isdigit(c)) {</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  val = (val * base) + (<a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a>)(c - <span class="charliteral">'0'</span>);</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  c = *++cp;</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (base == 16 && isxdigit(c)) {</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  val = (val << 4) | (<a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a>)(c + 10 - (islower(c) ? <span class="charliteral">'a'</span> : <span class="charliteral">'A'</span>));</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  c = *++cp;</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  }</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  }</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keywordflow">if</span> (c == <span class="charliteral">'.'</span>) {</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="comment"> * Internet format:</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="comment"> * a.b.c.d</span></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="comment"> * a.b.c (with c treated as 16 bits)</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment"> * a.b (with b treated as 24 bits)</span></div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordflow">if</span> (pp >= parts + 3) {</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  }</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  *pp++ = val;</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  c = *++cp;</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  }</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  }</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span> <span class="comment"> * Check for trailing characters.</span></div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordflow">if</span> (c != <span class="charliteral">'\0'</span> && !isspace(c)) {</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  }</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="comment"> * Concoct the address according to</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="comment"> * the number of parts specified.</span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">switch</span> (pp - parts + 1) {</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="keywordflow">case</span> 0:</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keywordflow">return</span> 0; <span class="comment">/* initial nondigit */</span></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  </div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">case</span> 1: <span class="comment">/* a -- 32 bits */</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  </div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordflow">case</span> 2: <span class="comment">/* a.b -- 8.24 bits */</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordflow">if</span> (val > 0xffffffUL) {</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  }</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordflow">if</span> (parts[0] > 0xff) {</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordflow">return</span> 0;</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>  val |= parts[0] << 24;</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  </div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keywordflow">case</span> 3: <span class="comment">/* a.b.c -- 8.8.16 bits */</span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordflow">if</span> (val > 0xffff) {</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  }</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordflow">if</span> ((parts[0] > 0xff) || (parts[1] > 0xff)) {</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  }</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  val |= (parts[0] << 24) | (parts[1] << 16);</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  </div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keywordflow">case</span> 4: <span class="comment">/* a.b.c.d -- 8.8.8.8 bits */</span></div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="keywordflow">if</span> (val > 0xff) {</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  }</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keywordflow">if</span> ((parts[0] > 0xff) || (parts[1] > 0xff) || (parts[2] > 0xff)) {</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  }</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <a class="code" href="../../db/d16/debug_8h.html#a94ad086267808462beae2b38f91996ed">LWIP_ASSERT</a>(<span class="stringliteral">"unhandled"</span>, 0);</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  }</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keywordflow">if</span> (addr) {</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  ip4_addr_set_u32(addr, <a class="code" href="../../d2/d6e/def_8c.html#a14f94347a5b9b9e3602705b75b7ae524">lwip_htonl</a>(val));</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  }</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> }</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  </div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span> <span class="keywordtype">char</span>*</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> ip4addr_ntoa(<span class="keyword">const</span> ip4_addr_t *addr)</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="keyword">static</span> <span class="keywordtype">char</span> str[IP4ADDR_STRLEN_MAX];</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keywordflow">return</span> ip4addr_ntoa_r(addr, str, IP4ADDR_STRLEN_MAX);</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> }</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  </div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="keywordtype">char</span>*</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> ip4addr_ntoa_r(<span class="keyword">const</span> ip4_addr_t *addr, <span class="keywordtype">char</span> *<a class="code" href="../../d9/dd0/structbuf.html">buf</a>, <span class="keywordtype">int</span> buflen)</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> {</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4c14294869aceba3ef9d4c0c302d0f33">u32_t</a> s_addr;</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordtype">char</span> inv[3];</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keywordtype">char</span> *rp;</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *ap;</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> rem;</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> n;</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> i;</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keywordtype">int</span> len = 0;</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  </div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  s_addr = ip4_addr_get_u32(addr);</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  </div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  rp = <a class="code" href="../../d9/dd0/structbuf.html">buf</a>;</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  ap = (<a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *)&s_addr;</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordflow">for</span> (n = 0; n < 4; n++) {</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  i = 0;</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">do</span> {</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  rem = *ap % (<a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a>)10;</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  *ap /= (<a class="code" href="../../de/d8c/group__compiler__abstraction.html#ga4caecabca98b43919dd11be1c0d4cd8e">u8_t</a>)10;</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  inv[i++] = (char)(<span class="charliteral">'0'</span> + rem);</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  } <span class="keywordflow">while</span> (*ap);</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keywordflow">while</span> (i--) {</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keywordflow">if</span> (len++ >= buflen) {</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keywordflow">return</span> <a class="code" href="../../d6/d8a/fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</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>  *rp++ = inv[i];</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  }</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keywordflow">if</span> (len++ >= buflen) {</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="keywordflow">return</span> <a class="code" href="../../d6/d8a/fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  }</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  *rp++ = <span class="charliteral">'.'</span>;</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  ap++;</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  }</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  *--rp = 0;</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keywordflow">return</span> <a class="code" href="../../d9/dd0/structbuf.html">buf</a>;</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>  </div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span> <span class="preprocessor">#endif </span><span class="comment">/* LWIP_IPV4 */</span><span class="preprocessor"></span></div>
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</div><!-- doc-content -->
<div class="ttc" id="aopt_8h_html"><div class="ttname"><a href="../../dc/dba/opt_8h.html">opt.h</a></div></div>
<div class="ttc" id="adebug_8h_html_a94ad086267808462beae2b38f91996ed"><div class="ttname"><a href="../../db/d16/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="../../db/d16/debug_8h_source.html#l00116">debug.h:116</a></div></div>
<div class="ttc" id="agroup__compiler__abstraction_html_ga4c14294869aceba3ef9d4c0c302d0f33"><div class="ttname"><a href="../../de/d8c/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="../../d2/d2d/arch_8h_source.html#l00126">arch.h:126</a></div></div>
<div class="ttc" id="astructnetif_html_a1c171db6097bbb6f09f63549a66e00ea"><div class="ttname"><a href="../../d2/dd6/structnetif.html#a1c171db6097bbb6f09f63549a66e00ea">netif::flags</a></div><div class="ttdeci">u8_t flags</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/d69/netif_8h_source.html#l00313">netif.h:313</a></div></div>
<div class="ttc" id="anetif_8h_html"><div class="ttname"><a href="../../d9/d69/netif_8h.html">netif.h</a></div></div>
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<div class="ttc" id="aip__addr_8h_html_a88b43639738c4de2d3cd22e3a1fd7696"><div class="ttname"><a href="../../de/df7/ip__addr_8h.html#a88b43639738c4de2d3cd22e3a1fd7696">ip_addr_t</a></div><div class="ttdeci">ip6_addr_t ip_addr_t</div><div class="ttdef"><b>Definition:</b> <a href="../../de/df7/ip__addr_8h_source.html#l00290">ip_addr.h:290</a></div></div>
<div class="ttc" id="astructbuf_html"><div class="ttname"><a href="../../d9/dd0/structbuf.html">buf</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d6/d6d/buf_8h_source.html#l00035">buf.h:35</a></div></div>
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<div class="ttc" id="adef_8c_html_a14f94347a5b9b9e3602705b75b7ae524"><div class="ttname"><a href="../../d2/d6e/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="../../d2/d6e/def_8c_source.html#l00088">def.c:88</a></div></div>
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<div class="ttc" id="afat__string_8h_html_a070d2ce7b6bb7e5c05602aa8c308d0c4"><div class="ttname"><a href="../../d6/d8a/fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a></div><div class="ttdeci">#define NULL</div><div class="ttdef"><b>Definition:</b> <a href="../../d6/d8a/fat__string_8h_source.html#l00017">fat_string.h:17</a></div></div>
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