public void GatewayTest()
{
INetworkInterface[] interfaces = NetworkInterface.GetAllNetworkInterfaces();
Assert.IsTrue(interfaces.Length > 0, "No interfaces available to test");
// make sure DHCP is not enabled
bool wasDhcpEnabled = interfaces[0].GetIPProperties().GetIPv4Properties().IsDhcpEnabled;
if (wasDhcpEnabled)
{
interfaces[0].GetIPProperties().GetIPv4Properties().IsDhcpEnabled = false;
interfaces[0].Rebind();
}
GatewayIPAddressInformationCollection gateways = interfaces[0].GetIPProperties().GatewayAddresses;
if (gateways.Count == 0)
{
gateways.Add(IPAddress.Parse("10.1.1.1"));
interfaces[0].Rebind();
}
IPAddress oldGateway = gateways[0].Address;
IPAddress newGateway = IPAddress.Parse("10.0.0.0");
// make sure it's new
if (newGateway.Equals(oldGateway))
{
newGateway = IPAddress.Parse("10.1.1.1");
}
gateways[0].Address = newGateway;
interfaces[0].Rebind();
// no exception == pass
// read
gateways = interfaces[0].GetIPProperties().GatewayAddresses;
Assert.IsTrue(newGateway.Equals(gateways[0].Address), string.Format("Gateway read back ({0}) did not match what we wrote in ({1})", gateways[0].Address, newGateway.Address));
// restore
if (wasDhcpEnabled)
{
interfaces[0].GetIPProperties().GetIPv4Properties().IsDhcpEnabled = true;
}
else
{
gateways[0].Address = oldGateway;
interfaces[0].Rebind();
}
}
