public byte[] BuildUDPPacket(UpdThreadParam param)
{
byte[] ipAddr = param.LocalAddr.GetAddressBytes();
if(ipAddr.Length != 4)
return null;
List<byte> bytePacket = new List<byte>();
bytePacket.Add(0x02);
bytePacket.Add(ipAddr[0]);
bytePacket.Add(ipAddr[1]);
bytePacket.Add(ipAddr[2]);
bytePacket.Add(ipAddr[3]);
byte[] port = BitConverter.GetBytes((ushort)param.TcpPort);
//高字节在前
bytePacket.Add(port[1]);
bytePacket.Add(port[0]);
ushort VerDataLen = 0;
List<byte> byteVer = new List<byte>();
for(int i=0; i< param.lstAllUpdateFile.Count; i++)
{
byte[] VerData = GetVerData(param.lstAllUpdateFile[i]);
if(VerData != null)
{
byteVer.AddRange(VerData);
VerDataLen += (ushort)VerData.Length;
}
}
byte[] byteVerLen = BitConverter.GetBytes(VerDataLen);
//高字节在前
bytePacket.Add(byteVerLen[1]);
bytePacket.Add(byteVerLen[0]);
bytePacket.AddRange(byteVer);
bytePacket.Add(0x03);
byte xorByte = GetXorValue(bytePacket,1,bytePacket.Count-2);
bytePacket.Add(xorByte);
return bytePacket.ToArray();
}
private void StartUdpBroadcast(IPAddress localaddr, int nPort, int nPortInData)
{
IPEndPoint endPoint = new IPEndPoint(IPAddress.Any, 0);
UdpClient broadcastUdp = new UdpClient(endPoint);
IPEndPoint endpoint = new IPEndPoint(IPAddress.Parse("255.255.255.255"), nPort);
//后台线程参数
UpdThreadParam ThreadPar = new UpdThreadParam();
ThreadPar.Client = broadcastUdp;
ThreadPar.UdpEP = endpoint;
ThreadPar.LocalAddr = localaddr;
ThreadPar.TcpPort = nPortInData;
ThreadPar.lstAllUpdateFile = lstUpdateFile;
m_bBackground = true;
Thread t = new Thread(new ParameterizedThreadStart(BroadcastThread));
t.IsBackground = true;
t.Start(ThreadPar);
}
