public void DeleteRoutes(VpnConfig vpnConfig)
{
switch (vpnConfig.SplitTunnelMode)
{
case SplitTunnelMode.Block:
foreach (string ip in vpnConfig.SplitTunnelIPs)
{
RoutingTableHelper.DeleteRoute(new NetworkAddress(ip).Ip);
}
break;
}
}
public void SetUpRoutingTable(VpnConfig vpnConfig, string localIp)
{
INetworkInterface adapter = _networkInterfaceLoader.GetByVpnProtocol(vpnConfig.VpnProtocol, vpnConfig.OpenVpnAdapter);
switch (vpnConfig.SplitTunnelMode)
{
case SplitTunnelMode.Permit:
//Remove default wireguard route as it has metric 0, but instead we add the same route with low priority
//so that we still have the route for include mode apps to be routed through the tunnel.
RoutingTableHelper.DeleteRoute("0.0.0.0", "0.0.0.0", localIp);
RoutingTableHelper.CreateRoute("0.0.0.0", "0.0.0.0", localIp, adapter.Index, ROUTE_METRIC);
RoutingTableHelper.CreateRoute(_config.WireGuard.DefaultDnsServer, "255.255.255.255", localIp, adapter.Index, ROUTE_METRIC);
foreach (string ip in vpnConfig.SplitTunnelIPs)
{
NetworkAddress address = new(ip);
RoutingTableHelper.CreateRoute(address.Ip, address.Mask, localIp, adapter.Index, ROUTE_METRIC);
}
break;
case SplitTunnelMode.Block:
INetworkInterface bestInterface = _networkInterfaces.GetBestInterface(_config.GetHardwareId(vpnConfig.OpenVpnAdapter));
int result = RoutingTableHelper.GetIpInterfaceEntry(bestInterface.Index, out MibIPInterfaceRow interfaceRow);
if (result == 0)
{
foreach (string ip in vpnConfig.SplitTunnelIPs)
{
NetworkAddress address = new(ip);
RoutingTableHelper.CreateRoute(
address.Ip,
address.Mask,
bestInterface.DefaultGateway.ToString(),
bestInterface.Index,
(int)interfaceRow.Metric);
}
}
break;
}
}
