public void HandleCapture(byte[] buffer, int offset, int length)
{
TimeSpan timeOffset = DateTime.UtcNow - _connectedAt;
MemoryStream stream = PrepareSendFrame(RPCAP_VERSION, RPCAP_MSG_PACKET, 0);
NetworkWriter writer = new NetworkWriter(stream);
uint seconds = (uint)Math.Floor(timeOffset.TotalSeconds);
uint microseconds = (uint)((timeOffset.Ticks % TimeSpan.TicksPerSecond) / 10L);
int bytesToTransmit = Math.Min(_snapLength, length);
writer.WriteUnsigned32(seconds);
writer.WriteUnsigned32(microseconds);
writer.WriteUnsigned32((uint)bytesToTransmit);
writer.WriteUnsigned32((uint)length);
writer.WriteUnsigned32(_packetNumber++);
stream.Write(buffer, offset, bytesToTransmit);
CompleteSendFrame(stream);
}
void HandleStartCaptureRequest(byte[] data)
{
// Read in the various fields:
NetworkReader reader = new NetworkReader(data);
uint snapLength = reader.ReadUnsigned32();
uint readTimeout = reader.ReadUnsigned32();
ushort flags = reader.ReadUnsigned16();
ushort clientDataPortOrZero = reader.ReadUnsigned16();
ushort filterType = reader.ReadUnsigned16();
ushort dummy = reader.ReadUnsigned16();
uint numberOfItems = reader.ReadUnsigned32();
for (int i = 0; i < numberOfItems; i++)
{
ushort code = reader.ReadUnsigned16();
byte jumpTrue = reader.ReadUnsigned8();
byte jumpFalse = reader.ReadUnsigned8();
int instructionValue = reader.ReadSigned32();
}
// Set up a data port:
if (_dataConnectorHandle == null)
{
_dataConnectorHandle = _service.Reactor.ListenStream(new RemoteCaptureProtocolDataFactory(this));
}
int bufferSize = (int)snapLength;
ushort serverDataPort = (ushort)_dataConnectorHandle.ListeningOnPort;
MemoryStream stream = PrepareSendFrame(RPCAP_VERSION, RPCAP_MSG_STARTCAP_REPLY, 0);
NetworkWriter writer = new NetworkWriter(stream);
writer.WriteSigned32(bufferSize);
writer.WriteUnsigned16(serverDataPort);
writer.WriteUnsigned16(0); // (This is a reserved field.)
CompleteSendFrame(stream);
}
void HandleOpenRequest(byte[] data)
{
string deviceName = Encoding.UTF8.GetString(data);
MemoryStream stream = PrepareSendFrame(RPCAP_VERSION, RPCAP_MSG_OPEN_REPLY, 0);
NetworkWriter writer = new NetworkWriter(stream);
uint linkType = DLT_EN10MB;
uint offsetFromUtc = 0;
writer.WriteUnsigned32(linkType);
writer.WriteUnsigned32(offsetFromUtc);
CompleteSendFrame(stream);
}
