/// <summary>
/// Pushes this frame to the output queue and adds the ethernet component of this frame according to the given destination address and interface properties.<br />
/// If fFrame contains an Ethernet component, the Ethernet component is removed.
/// </summary>
/// <param name="fFrame">The frame to send. This frame must contain an IPv4 or IPv6 frame.</param>
/// <param name="ipaDestination">The next hop's IP address of the given frame</param>
public override void Send(Frame fFrame, IPAddress ipaDestination)
{
IPFrame ipFrame = GetIPFrame(fFrame);
if (ipFrame == null)
{
throw new ArgumentException("Cannot send a non IP frame, because the ether-type cannot be guessed. Please use the Send(Frame, IPAddress, EtherType) method instead.");
}
foreach (IPFrame fFragment in IPFragmenter.Fragment(ipFrame, MTU))
{
if (ipFrame.Version == 4)
{
Send(fFragment, ipaDestination, EtherType.IPv4);
}
else if (ipFrame.Version == 6)
{
Send(fFragment, ipaDestination, EtherType.IPv6);
}
else
{
throw new ArgumentException("The given IP frame has an invalid IP version specified.");
}
}
}
/// <summary>
/// Encapsulates the given IP frame according to the binding of this socket and invokes the FrameEncapsulated event when finished.
/// <remarks>This method also handles IP fragmentation</remarks>
/// </summary>
/// <param name="fFrame">The frame to process</param>
/// <param name="bPush">A bool indicating whether the frame is delivered with a push flag</param>
public override void PushDown(Frame fFrame, bool bPush)
{
if (iIPVersion == 4)
{
IPv4Frame ipv4Frame = new IPv4Frame();
ipv4Frame.DestinationAddress = RemoteBinding;
ipv4Frame.SourceAddress = LocalBinding;
ipv4Frame.Protocol = ProtocolBinding;
ipv4Frame.Identification = (uint)rRandom.Next(Int32.MaxValue);
ipv4Frame.EncapsulatedFrame = fFrame;
foreach (IPFrame fFragment in IPFragmenter.FragmentV4(ipv4Frame, MaximumTransmissionUnit))
{
InvokeFrameEncapsulated(fFragment, bPush);
}
}
else if (iIPVersion == 6)
{
IPv6Frame ipv6Frame = new IPv6Frame();
ipv6Frame.DestinationAddress = RemoteBinding;
ipv6Frame.SourceAddress = LocalBinding;
ipv6Frame.Protocol = ProtocolBinding;
ipv6Frame.EncapsulatedFrame = fFrame;
foreach (IPFrame fFragment in IPFragmenter.FragmentV6(ipv6Frame, MaximumTransmissionUnit))
{
InvokeFrameEncapsulated(fFragment, bPush);
}
}
else
{
throw new ArgumentException("Only IPv4 and IPv6 addresses are supportet on the moment.");
}
}
