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<div id="projectname">FairMQ
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 <span id="projectnumber">1.2.1</span>
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<div id="projectbrief">C++ Message Passing Framework</div>
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<li class="navelem"><a class="el" href="dir_d6b28f7731906a8cbc4171450df4b180.html">fairmq</a></li><li class="navelem"><a class="el" href="dir_b7a9729ec9acb584ba3af78f8b60e470.html">tools</a></li> </ul>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/********************************************************************************</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (C) 2017 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH *</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * *</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * This software is distributed under the terms of the *</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * GNU Lesser General Public Licence (LGPL) version 3, *</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * copied verbatim in the file "LICENSE" *</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> </div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#ifndef FAIR_MQ_TOOLS_NETWORK_H</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#define FAIR_MQ_TOOLS_NETWORK_H</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#ifndef _GNU_SOURCE</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#define _GNU_SOURCE // To get defns of NI_MAXSERV and NI_MAXHOST</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include "FairMQLogger.h"</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <sys/socket.h></span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include <sys/types.h></span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <netdb.h></span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <ifaddrs.h></span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <stdio.h></span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <boost/algorithm/string.hpp></span> <span class="comment">// trim</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <boost/asio.hpp></span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include <map></span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <string></span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <iostream></span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <array></span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <exception></span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <algorithm></span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">namespace </span><a class="code" href="namespacefair.html">fair</a></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> {</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">namespace </span>mq</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> {</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">namespace </span>tools</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</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="comment">// returns a map with network interface names as keys and their IP addresses as values</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> getHostIPs(std::map<std::string, std::string>& addressMap)</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> {</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keyword">struct </span>ifaddrs *ifaddr, *ifa;</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordtype">int</span> s;</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordtype">char</span> host[NI_MAXHOST];</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">if</span> (getifaddrs(&ifaddr) == -1)</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  {</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  perror(<span class="stringliteral">"getifaddrs"</span>);</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</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="keywordflow">for</span> (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next)</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="keywordflow">if</span> (ifa->ifa_addr == NULL)</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="keywordflow">continue</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> </div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">if</span> (ifa->ifa_addr->sa_family == AF_INET)</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>  s = getnameinfo(ifa->ifa_addr, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">if</span> (s != 0)</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>  std::cout << <span class="stringliteral">"getnameinfo() failed: "</span> << gai_strerror(s) << std::endl;</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  }</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  addressMap.insert(std::pair<std::string, std::string>(ifa->ifa_name, host));</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  }</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  }</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  freeifaddrs(ifaddr);</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> }</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment">// get IP address of a given interface name</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="keyword">inline</span> std::string getInterfaceIP(std::string interface)</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> {</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  std::map<std::string, std::string> IPs;</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  getHostIPs(IPs);</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">if</span> (IPs.count(interface))</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="keywordflow">return</span> IPs[interface];</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="keywordflow">else</span></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>  LOG(error) << <span class="stringliteral">"Could not find provided network interface: \""</span> << <span class="keyword">interface </span><< "\"!, exiting.";</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">return</span> <span class="stringliteral">""</span>;</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  }</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> </div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment">// get name of the default route interface</span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="keyword">inline</span> std::string getDefaultRouteNetworkInterface()</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> {</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  std::array<char, 128> buffer;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  std::string interfaceName;</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">#ifdef __APPLE__ // MacOS</span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  std::unique_ptr<FILE, decltype(pclose) *> file(popen(<span class="stringliteral">"route -n get default | grep interface | cut -d \":\" -f 2"</span>, <span class="stringliteral">"r"</span>), pclose);</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="preprocessor">#else // Linux</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  std::unique_ptr<FILE, decltype(pclose) *> file(popen(<span class="stringliteral">"ip route | grep default | cut -d \" \" -f 5 | head -n 1"</span>, <span class="stringliteral">"r"</span>), pclose);</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">if</span> (!file)</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  {</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  LOG(error) << <span class="stringliteral">"Could not detect default route network interface name - popen() failed!"</span>;</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">return</span> <span class="stringliteral">""</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> </div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">while</span> (!feof(file.get()))</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>  <span class="keywordflow">if</span> (fgets(buffer.data(), 128, file.get()) != NULL)</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  {</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  interfaceName += buffer.data();</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  }</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> </div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  boost::algorithm::trim(interfaceName);</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="keywordflow">if</span> (interfaceName == <span class="stringliteral">""</span>)</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  {</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  LOG(error) << <span class="stringliteral">"Could not detect default route network interface name"</span>;</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  }</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  {</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  LOG(debug) << <span class="stringliteral">"Detected network interface name for the default route: "</span> << interfaceName;</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  }</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">return</span> interfaceName;</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> </div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="keyword">inline</span> std::string getIpFromHostname(<span class="keyword">const</span> std::string& hostname)</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> {</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordflow">try</span> {</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keyword">namespace </span>bai = boost::asio::ip;</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  boost::asio::io_service ios;</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  bai::tcp::resolver resolver(ios);</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  bai::tcp::resolver::query query(hostname, <span class="stringliteral">""</span>);</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  bai::tcp::resolver::iterator end;</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keyword">auto</span> it = std::find_if(<span class="keyword">static_cast<</span>bai::basic_resolver_iterator<bai::tcp><span class="keyword">></span>(resolver.resolve(query)), end, [](<span class="keyword">const</span> bai::tcp::endpoint& ep) {</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordflow">return</span> ep.address().is_v4();</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> </div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordflow">if</span> (it != end) {</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  std::stringstream ss;</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  ss << static_cast<bai::tcp::endpoint>(*it).address();</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">return</span> ss.str();</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  }</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> </div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  LOG(warn) << <span class="stringliteral">"could not find ipv4 address for hostname '"</span> << hostname << <span class="stringliteral">"'"</span>;</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> </div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">return</span> <span class="stringliteral">""</span>;</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  } <span class="keywordflow">catch</span> (std::exception& e) {</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  LOG(error) << <span class="stringliteral">"could not resolve hostname '"</span> << hostname << <span class="stringliteral">"', reason: "</span> << e.what();</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordflow">return</span> <span class="stringliteral">""</span>;</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</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> </div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="keyword">inline</span> std::string getIpFromHostname(<span class="keyword">const</span> std::string& hostname, boost::asio::io_service& ios)</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span> {</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">try</span> {</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keyword">namespace </span>bai = boost::asio::ip;</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  bai::tcp::resolver resolver(ios);</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  bai::tcp::resolver::query query(hostname, <span class="stringliteral">""</span>);</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  bai::tcp::resolver::iterator end;</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span> </div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keyword">auto</span> it = std::find_if(<span class="keyword">static_cast<</span>bai::basic_resolver_iterator<bai::tcp><span class="keyword">></span>(resolver.resolve(query)), end, [](<span class="keyword">const</span> bai::tcp::endpoint& ep) {</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordflow">return</span> ep.address().is_v4();</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> </div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordflow">if</span> (it != end) {</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  std::stringstream ss;</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  ss << static_cast<bai::tcp::endpoint>(*it).address();</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordflow">return</span> ss.str();</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>  LOG(warn) << <span class="stringliteral">"could not find ipv4 address for hostname '"</span> << hostname << <span class="stringliteral">"'"</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="keywordflow">return</span> <span class="stringliteral">""</span>;</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  } <span class="keywordflow">catch</span> (std::exception& e) {</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  LOG(error) << <span class="stringliteral">"could not resolve hostname '"</span> << hostname << <span class="stringliteral">"', reason: "</span> << e.what();</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordflow">return</span> <span class="stringliteral">""</span>;</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> }</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> </div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span> } <span class="comment">/* namespace tools */</span></div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> } <span class="comment">/* namespace mq */</span></div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> } <span class="comment">/* namespace fair */</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="preprocessor">#endif </span><span class="comment">/* FAIR_MQ_TOOLS_NETWORK_H */</span><span class="preprocessor"></span></div><div class="ttc" id="namespacefair_html"><div class="ttname"><a href="namespacefair.html">fair</a></div><div class="ttdef"><b>Definition:</b> DeviceRunner.h:23</div></div>
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