public IP4Header(ByteBuffer buffer)
{
try
{
byte versionAndIHL = (byte)buffer.Get();
this.version = (byte)(versionAndIHL >> 4);
this.IHL = (byte)(versionAndIHL & 0x0F);
this.headerLength = this.IHL << 2;
this.typeOfService = BitUtils.GetUnsignedByte((byte)buffer.Get());
this.totalLength = BitUtils.GetUnsignedShort(buffer.Short);
this.identificationAndFlagsAndFragmentOffset = buffer.Int;
this.TTL = BitUtils.GetUnsignedByte((byte)buffer.Get());
this.protocolNum = BitUtils.GetUnsignedByte((byte)buffer.Get());
this.protocol = (TransportProtocol)protocolNum;
this.headerChecksum = BitUtils.GetUnsignedShort(buffer.Short);
byte[] addressBytes = new byte[4];
buffer.Get(addressBytes, 0, 4);
this.sourceAddress = InetAddress.GetByAddress(addressBytes);
buffer.Get(addressBytes, 0, 4);
this.destinationAddress = InetAddress.GetByAddress(addressBytes);
//this.optionsAndPadding = buffer.getInt();
}
catch
{
throw new UnknownHostException();
}
}
public string GetBroadcastAddress()
{
Log.Debug("UDP", "Getting broadcast adress");
WifiManager wifi = (WifiManager)Android.App.Application.Context.GetSystemService(Context.WifiService);
DhcpInfo dhcp = wifi.DhcpInfo;
// handle null somehow
int broadcast = (dhcp.IpAddress & dhcp.Netmask) | ~dhcp.Netmask;
byte[] quads = new byte[4];
for (int k = 0; k < 4; k++)
{
quads[k] = (byte)((broadcast >> k * 8) & 0xFF);
}
Log.Debug("UDP", "Adrress is: " + InetAddress.GetByAddress(quads));
return(InetAddress.GetByAddress(quads).ToString());
}
//ブロードキャストアドレスの取得
InetAddress getBroadcastAddress()
{
DhcpInfo dhcpInfo = wifi.DhcpInfo;
int broadcast = (dhcpInfo.IpAddress & dhcpInfo.Netmask) | ~dhcpInfo.Netmask;
byte[] quads = new byte[4];
for (int i = 0; i < 4; i++)
{
quads[i] = (byte)((broadcast >> i * 8) & 0xFF);
}
try
{
return(InetAddress.GetByAddress(quads));
}
catch (IOException e)
{
e.PrintStackTrace();
return(null);
}
}
public override void OnOutputBufferAvailable(MediaCodec codec, int index, MediaCodec.BufferInfo info)
{
ByteBuffer outputBuffer = codec.GetOutputBuffer(index);
byte[] outputArray = new byte[outputBuffer.Remaining()];
outputBuffer.Get(outputArray);
DatagramPacket packet = new DatagramPacket(outputArray, outputArray.Length, InetAddress.GetByAddress(new byte[] { 192, 168, 0, 31 }), 9482);
_udpSocket.Send(packet);
codec.ReleaseOutputBuffer(index, false);
}
