public void ConstructPacket_MultipleRelayPackets()
{
IPv6HeaderInformation header = new IPv6HeaderInformation(IPv6Address.FromString("fe80::1"), IPv6Address.FromString("fe80::2"));
Int32 depth = 10;
DHCPv6Packet receivedInnerPacket = DHCPv6Packet.AsInner(1, DHCPv6PacketTypes.Solicit, Array.Empty <DHCPv6PacketOption>());
DHCPv6Packet innerPacket = receivedInnerPacket;
List <IPv6Address> expectedLinkAddresses = new List <IPv6Address>();
for (int i = 0; i < depth; i++)
{
IPv6Address linkAddress = IPv6Address.FromString($"fe{i}::1");
DHCPv6RelayPacket outerPacket = DHCPv6RelayPacket.AsInnerRelay(
true, 1,
linkAddress, IPv6Address.FromString($"fe{i}::2"),
Array.Empty <DHCPv6PacketOption>(),
innerPacket);
innerPacket = outerPacket;
expectedLinkAddresses.Insert(0, linkAddress);
}
DHCPv6RelayPacket inputPacket = DHCPv6RelayPacket.AsOuterRelay(
header,
true, 1,
IPv6Address.FromString("ff70::1"), IPv6Address.FromString("fe80::2"),
Array.Empty <DHCPv6PacketOption>(),
innerPacket);
expectedLinkAddresses.Insert(0, IPv6Address.FromString("ff70::1"));
DHCPv6Packet sendInnerPacket = DHCPv6Packet.AsInner(1, DHCPv6PacketTypes.ADVERTISE, Array.Empty <DHCPv6PacketOption>());
DHCPv6Packet packet = DHCPv6Packet.ConstructPacket(inputPacket, sendInnerPacket);
Assert.IsAssignableFrom <DHCPv6RelayPacket>(packet);
DHCPv6RelayPacket relayPacket = (DHCPv6RelayPacket)packet;
DHCPv6Packet innerUsedPacket = relayPacket.GetInnerPacket();
Assert.Equal(sendInnerPacket, innerUsedPacket);
for (int i = 0; i < expectedLinkAddresses.Count; i++)
{
DHCPv6RelayPacket innerRelayPacket = GetInnerRelayPacket(relayPacket, i);
Assert.Equal(innerRelayPacket.LinkAddress, expectedLinkAddresses[i]);
Assert.Equal((Byte)(expectedLinkAddresses.Count - i - 1), innerRelayPacket.HopCount);
}
}
