C++ send UDP message to node.js UDP server has unrecognizable code -

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my node.js udp server's code 

var port = 515; var host = '127.0.0.1';  var dgram = require('dgram'); var server = dgram.createsocket('udp4');  server.on('listening', function () {     var address = server.address();     console.log('udp server listening on ' + address.address + ":" + address.port); });  server.on('message', function (message, remote) {     console.log(remote.address + ':' + remote.port +' - ' + message);  });  server.bind(port, host);

and c++ client's code is:

    word wversionrequested = makeword(1, 1);     wsadata wsadata;     int err = wsastartup(wversionrequested, &wsadata);      if (err != 0)     {         return false;     }      if ( lobyte( wsadata.wversion) != 1 ||         hibyte( wsadata.wversion) != 1 )      {         wsacleanup();         return false;     }      // server address     srvaddress.sin_addr.s_un.s_addr = inet_addr(getprofileudphost());     srvaddress.sin_family = af_inet;     srvaddress.sin_port = htons(getprofileudpport());  int udpsend(cstring& content, sockaddr* address) {     socket sockclient = socket(af_inet, sock_dgram, 0);      int result = sendto(sockclient,          content,          content.getlength()+1,          0,          address, sizeof(sockaddr));      closesocket(sockclient);      return result; }

when user sends characters "中文",the nodejs udp server receives " ".it gets unrecognizable code. nodejs code's encoding utf-8 , changing ansi same problem.


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