public static bool RouteExists(string destinationIP)
{
List <Ip4RouteEntry> routeTable = Ip4RouteTable.GetRouteTable();
Ip4RouteEntry routeEntry = routeTable.Find(i => i.DestinationIP.ToString().Equals(destinationIP));
return(routeEntry != null);
}
public static bool InterfaceIndexExists(int interfaceIndex)
{
List <Ip4RouteEntry> routeTable = Ip4RouteTable.GetRouteTable();
Ip4RouteEntry routeEntry = routeTable.Find(i => i.InterfaceIndex.Equals(interfaceIndex));
return(routeEntry != null);
}
public static List <Ip4RouteEntry> GetRouteEntry(string destinationIP, string mask)
{
List <Ip4RouteEntry> routeTable = Ip4RouteTable.GetRouteTable();
List <Ip4RouteEntry> routeMatches = routeTable.FindAll(i => i.DestinationIP.ToString().Equals(destinationIP) && i.SubnetMask.ToString().Equals(mask));
return(routeMatches);
}
public static List <NetworkAdaptor> GetAllNetworkAdaptor()
{
List <NetworkAdaptor> naList = new List <NetworkAdaptor>();
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface adapter in nics)
{
IPInterfaceProperties properties = adapter.GetIPProperties();
IPv4InterfaceProperties ip4Properties = null;
if (!HasIp4Support(adapter))
{
continue;
}
else
{
ip4Properties = properties.GetIPv4Properties();
}
NetworkAdaptor na = new NetworkAdaptor();
na.Name = adapter.Name;
na.Description = adapter.Description;
na.MACAddress = adapter.GetPhysicalAddress().ToString();
na.InterfaceIndex = ip4Properties != null ? ip4Properties.Index : 0;
na.PrimaryIpAddress = properties.UnicastAddresses.Where(i => i.Address.AddressFamily == AddressFamily.InterNetwork)?.First()?.Address;
na.SubnetMask = properties.UnicastAddresses.Where(i => i.Address.AddressFamily == AddressFamily.InterNetwork)?.First()?.IPv4Mask;
if (properties.GatewayAddresses.Count > 0)
{
na.PrimaryGateway = null;
foreach (GatewayIPAddressInformation gatewayInfo in properties.GatewayAddresses)
{
if (gatewayInfo.Address != null && gatewayInfo.Address.AddressFamily == AddressFamily.InterNetwork)
{
na.PrimaryGateway = gatewayInfo.Address;
break;
}
}
}
else
{
//if the gateways on the Network adaptor properties is null, then get it from the routing table
List <Ip4RouteEntry> routeTable = Ip4RouteTable.GetRouteTable();
if (routeTable.Where(i => i.InterfaceIndex == na.InterfaceIndex).Count() > 0)
{
na.PrimaryGateway = routeTable.Where(i => i.InterfaceIndex == na.InterfaceIndex)?.First()?.GatewayIP;
}
}
if (na.PrimaryGateway == null && properties.DhcpServerAddresses.Count > 0)
{
na.PrimaryGateway = properties.DhcpServerAddresses.First();
}
naList.Add(na);
}
return(naList);
}
public static NetworkAdaptor GetNetworkAdaptor(int interfaceIndex)
{
NetworkAdaptor na = null;
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface adapter in nics)
{
IPInterfaceProperties properties = adapter.GetIPProperties();
if (!HasIp4Support(adapter))
{
continue;
}
IPv4InterfaceProperties ip4Properties = properties.GetIPv4Properties();
if (properties.GetIPv4Properties().Index == interfaceIndex)
{
na = new NetworkAdaptor();
na.Name = adapter.Name;
na.Description = adapter.Description;
na.MACAddress = adapter.GetPhysicalAddress().ToString();
na.InterfaceIndex = ip4Properties.Index;
na.PrimaryIpAddress = properties.UnicastAddresses.Where(i => i.Address.AddressFamily == AddressFamily.InterNetwork)?.First()?.Address;
na.SubnetMask = properties.UnicastAddresses.Where(i => i.Address.AddressFamily == AddressFamily.InterNetwork)?.First()?.IPv4Mask;
if (properties.GatewayAddresses.Count > 0)
{
na.PrimaryGateway = null;
foreach (GatewayIPAddressInformation gatewayInfo in properties.GatewayAddresses)
{
if (gatewayInfo.Address != null && gatewayInfo.Address.AddressFamily == AddressFamily.InterNetwork)
{
na.PrimaryGateway = gatewayInfo.Address;
break;
}
}
}
else
{
//if the gateways on the Network adaptor properties is null, then get it from the routing table, especially the case for VPN routers
List <Ip4RouteEntry> routeTable = Ip4RouteTable.GetRouteTable();
if (routeTable.Where(i => i.InterfaceIndex == na.InterfaceIndex)?.Count() > 0)
{
na.PrimaryGateway = routeTable.Where(i => i.InterfaceIndex == na.InterfaceIndex)?.First()?.GatewayIP;
}
}
//not ideal and incorrect, but hopefully it doesn't execute this as the gateways are defined elsewhere
//the correct way is to locate the primary gateway in some other property other than the 3 methods here
if (na.PrimaryGateway == null && properties.DhcpServerAddresses.Count > 0)
{
na.PrimaryGateway = properties.DhcpServerAddresses.First();
}
break;
}
}
return(na);
}
public static void DeleteRoute(string destinationIP, string mask)
{
List <Ip4RouteEntry> routeMatches = Ip4RouteTable.GetRouteEntry(destinationIP, mask);
if (routeMatches == null)
{
return;
}
foreach (Ip4RouteEntry routeEntry in routeMatches)
{
DeleteRoute(routeEntry);
}
}