public ArpReply(MacAddress sourceMacAddress, IpV4Address sourceIpv4Address,
MacAddress targetMacAddress, IpV4Address targetIpv4Address)
{
SourceMacAddress = sourceMacAddress;
SourceIpv4Address = sourceIpv4Address;
TargetMacAddress = targetMacAddress;
TargetIpv4Address = targetIpv4Address;
EthernetLayer = new EthernetLayer
{
Source = SourceMacAddress,
Destination = targetMacAddress,
EtherType = EthernetType.Arp
};
ArpLayer = new ArpLayer
{
Operation = ArpOperation.Reply,
ProtocolType = EthernetType.IpV4,
SenderHardwareAddress = SourceMacAddress.GetNetworkBytes().AsReadOnly(),
SenderProtocolAddress = SourceIpv4Address.GetNetworkBytes().AsReadOnly(),
TargetHardwareAddress = TargetMacAddress.GetNetworkBytes().AsReadOnly(),
TargetProtocolAddress = TargetIpv4Address.GetNetworkBytes().AsReadOnly()
};
PacketBuilder = new PacketBuilder(EthernetLayer, ArpLayer);
}
public ArpRequest(IpV4Address ipV4AddressToIdentify,
MacAddress requesterMacAddress, IpV4Address requesterIpV4Address,
Action <MacAddress> onIdentified)
{
if (requesterIpV4Address == ipV4AddressToIdentify)
{
throw new ArgumentException($"It doesn't make sense to ask {requesterIpV4Address} who {ipV4AddressToIdentify} is.");
}
IpV4AddressToIdentify = ipV4AddressToIdentify;
RequesterMacAddress = requesterMacAddress;
RequesterIpV4Address = requesterIpV4Address;
OnIdentified = onIdentified;
EthernetLayer = new EthernetLayer
{
Source = requesterMacAddress,
Destination = NetworkConstants.BroadcastMacAddress,
EtherType = EthernetType.Arp
};
ArpLayer = new ArpLayer
{
Operation = ArpOperation.Request,
ProtocolType = EthernetType.IpV4,
SenderHardwareAddress = requesterMacAddress.GetNetworkBytes().AsReadOnly(),
SenderProtocolAddress = requesterIpV4Address.GetNetworkBytes().AsReadOnly(),
TargetHardwareAddress = NetworkConstants.BroadcastMacAddress.GetNetworkBytes().AsReadOnly(),
TargetProtocolAddress = ipV4AddressToIdentify.GetNetworkBytes().AsReadOnly()
};
PacketBuilder = new PacketBuilder(EthernetLayer, ArpLayer);
}