A .NET (C#, Visual Basic.NET, etc) wrapper for the native DHCP management APIs exposed by Windows.
Install-Package DhcpServerApi
An initial focus has been made for read-only access to the data via the APIs, but the project can be easily extended to support read-write access.
Method 1: Discovering via directory services
// Discover DHCP Servers
foreach (var dhcpServer in DhcpServer.Servers)
{
Console.WriteLine(dhcpServer.Name);
}Method 2: Connecting directly
// Connect to DHCP Server
var dhcpServer = DhcpServer.Connect("SRV-DHCP-01"); // or 192.168.1.1
Console.WriteLine(dhcpServer.Name);// Connect to DHCP Server
var dhcpServer = DhcpServer.Servers.First();
// Display some configuration
Console.WriteLine($"Protocol Support: {dhcpServer.Configuration.ApiProtocolSupport}");
Console.WriteLine($"Database Name: {dhcpServer.Configuration.DatabaseName}");
Console.WriteLine($"Database Path: {dhcpServer.Configuration.DatabasePath}");
// Show all bound interfaces
foreach (var binding in dhcpServer.BindingElements)
{
Console.WriteLine($"Binding Interface Id: {binding.InterfaceGuidId}");
Console.WriteLine($" Description: {binding.InterfaceDescription}");
Console.WriteLine($" Adapter Address: {binding.AdapterPrimaryIpAddress}");
Console.WriteLine($" Adapter Subnet: {binding.AdapterSubnetAddress}");
}// Connect to DHCP Server
var dhcpServer = DhcpServer.Servers.First();
// Display scope information
foreach (var scope in dhcpServer.Scopes)
{
Console.WriteLine($"Scope: {scope.Name}");
Console.WriteLine($" Address: {scope.Address}");
Console.WriteLine($" Mask: {scope.Mask}");
Console.WriteLine($" Range: {scope.IpRange}");
Console.WriteLine($" State: {scope.State}");
}Client leases can be retrieved globally (all leases on the server) or individually for each scope.
// Connect to DHCP Server
var dhcpServer = DhcpServer.Servers.Skip(1).First();
// Get a scope
var scope = dhcpServer.Scopes.First();
Console.WriteLine($"Scope '{scope.Name}' Clients");
Console.WriteLine();
// Get active client leases
var activeClients = scope.Clients
.Where(c => c.AddressState == DhcpServerClientAddressStates.Active);
// Display client information
foreach (var client in activeClients)
{
Console.WriteLine($"{client.IpAddress} [{client.HardwareAddress}] {client.Name}, Expires: {client.LeaseExpires}");
}// Connect to DHCP Server
var dhcpServer = DhcpServer.Servers.First();
// Get a scope
var scope = dhcpServer.Scopes.First();
Console.WriteLine($"Scope '{scope.Name}' Reservations");
Console.WriteLine();
// Display reservation information
foreach (var reservation in scope.Reservations)
{
Console.WriteLine($"{reservation.IpAddress} [{reservation.HardwareAddress}] {reservation.Client.Name}");
}Options can be retrieved globally (all options on the server), for scopes or individual reservations.
// Connect to DHCP Server
var dhcpServer = DhcpServer.Servers.Skip(1).First();
// Get a scope
var scope = dhcpServer.Scopes.First();
Console.WriteLine($"Scope '{scope.Name}' Options");
Console.WriteLine();
// Get option values
foreach (var optionValue in scope.OptionValues)
{
Console.WriteLine($"{optionValue.Option.Name} [{optionValue.OptionId}]:");
foreach (var value in optionValue.Values)
{
Console.WriteLine($" {value.Value} [{value.Type}]");
}
}