network bindSocket错误码问题

let tcp = socket.constructTCPSocketInstance(); 
// 绑定本地IP地址和端口。 
let ipAddress : socket.NetAddress = {} as socket.NetAddress; 
ipAddress.address = this.resolveIP(wifiManager.getIpInfo().ipAddress); 
tcp.bind(ipAddress, (err: BusinessError) => { 
  if (err) { 
    console.log('test bind fail'); 
    return; 
  } 
  console.log('test bind success'); 
} 
 
wifimanager中获取非常用ip地址格式，其中转换string方式如下： 
resolveIP(ip: number): string { 
  if (ip < 0 || ip > 0xFFFFFFFF) { 
    return ""; 
  } 
  return (ip >>> 24) + '.' + (ip >> 16 & 0xFF) + '.' + (ip >> 8 & 0xFF) + '.' + (ip & 0xFF); 
}