private void SendICMPNeighborSolicitation(IPAddress ipaQuery, IPAddress ipaSource)
{
if (ipaQuery.AddressFamily != System.Net.Sockets.AddressFamily.InterNetworkV6)
{
throw new InvalidOperationException("Cannot send an ICMP Neighbor Solicitation for a non IPv6 address.");
}
ICMPv6Frame icmpFrame = new ICMPv6Frame();
icmpFrame.ICMPv6Type = ICMPv6Type.NeighborSolicitation;
icmpFrame.ICMPCode = 0;
NeighborSolicitation icmpDiscoveryMessage = new NeighborSolicitation();
icmpDiscoveryMessage.TargetAddress = ipaQuery;
NeighborDiscoveryOption icmpDiscoveryOption = new NeighborDiscoveryOption();
icmpDiscoveryOption.OptionType = ICMP.V6.NeighborDiscoveryOptionType.SourceLinkLayerAddress;
icmpDiscoveryOption.OptionData = this.PrimaryMACAddress.AddressBytes;
IPv6Frame ipFrame = new IPv6Frame();
ipFrame.SourceAddress = ipaSource;
ipFrame.DestinationAddress = IPAddressAnalysis.GetSolicitedNodeMulticastAddress(ipaQuery);
ipFrame.NextHeader = IPProtocol.IPv6_ICMP;
EthernetFrame ethFrame = new EthernetFrame();
ethFrame.Destination = MACAddress.MulticastFromIPv6Address(ipaQuery);
ethFrame.Source = PrimaryMACAddress;
ethFrame.EtherType = EtherType.IPv6;
ethFrame.EncapsulatedFrame = ipFrame;
ipFrame.EncapsulatedFrame = icmpFrame;
icmpFrame.EncapsulatedFrame = icmpDiscoveryMessage;
icmpDiscoveryMessage.EncapsulatedFrame = icmpDiscoveryOption;
icmpFrame.Checksum = icmpFrame.CalculateChecksum(ipFrame.GetPseudoHeader());
this.Send(ethFrame);
}
public Frame Parse(Frame fFrame)
{
if (fFrame.FrameType == this.Protocol)
{
return(fFrame);
}
ICMPv6Frame icmpFrame = new ICMPv6Frame(fFrame.FrameBytes);
switch (icmpFrame.ICMPv6Type)
{
case ICMPv6Type.NeighborAdvertisement:
icmpFrame.EncapsulatedFrame = new NeighborAdvertisment(icmpFrame.EncapsulatedFrame.FrameBytes);
break;
case ICMPv6Type.NeighborSolicitation:
icmpFrame.EncapsulatedFrame = new NeighborSolicitation(icmpFrame.EncapsulatedFrame.FrameBytes);
break;
}
return(icmpFrame);
}
private void SendICMPNeighborAdvertisment(IPAddress ipaDestination, IPAddress ipaSource)
{
if (ipaDestination.AddressFamily != System.Net.Sockets.AddressFamily.InterNetworkV6)
{
throw new InvalidOperationException("Cannot send an ICMP Neighbor Advertisement for a non IPv6 address.");
}
ICMPv6Frame icmpFrame = new ICMPv6Frame();
icmpFrame.ICMPv6Type = ICMPv6Type.NeighborAdvertisement;
icmpFrame.ICMPCode = 0;
NeighborAdvertisment icmpDiscoveryMessage = new NeighborAdvertisment();
icmpDiscoveryMessage.SolicitedFlag = true;
icmpDiscoveryMessage.OverrideFlag = true;
icmpDiscoveryMessage.TargetAddress = ipaSource;
NeighborDiscoveryOption icmpDiscoveryOption = new NeighborDiscoveryOption();
icmpDiscoveryOption.OptionType = ICMP.V6.NeighborDiscoveryOptionType.TargetLinkLayerAddress;
icmpDiscoveryOption.OptionData = this.PrimaryMACAddress.AddressBytes;
IPv6Frame ipFrame = new IPv6Frame();
ipFrame.SourceAddress = ipaSource;
ipFrame.DestinationAddress = ipaDestination;
ipFrame.NextHeader = IPProtocol.IPv6_ICMP;
ipFrame.EncapsulatedFrame = icmpFrame;
icmpFrame.EncapsulatedFrame = icmpDiscoveryMessage;
icmpDiscoveryMessage.EncapsulatedFrame = icmpDiscoveryOption;
icmpFrame.Checksum = icmpFrame.CalculateChecksum(ipFrame.GetPseudoHeader());
this.Send(ipFrame, ipaDestination);
}