public static byte[] GetBytes(this DhcpPacket packet, IDhcpPacketSerializer serializer)
{
using (MemoryStream ms = new MemoryStream())
using (BinaryWriter br = new BinaryWriter(ms))
{
serializer.Serialize(br, packet);
return(ms.ToArray());
}
}
public async Task <IReadOnlyList <DhcpPacket> > Discover(DhcpDiscoveryParameters parameters, CancellationToken ct)
{
var results = new List <DhcpPacket>();
var transactionId = GenerateTransactionId();
void ReceptionCallback(object sender, DhcpPacketEventArgs args)
{
HandleDhcpResponseReceived(results, args, transactionId);
}
_dhcpListener.PacketReceived += ReceptionCallback;
_dhcpListener.StartIfNotRunning();
using (var udpClient = new UdpClient())
{
var broadcastPacket = CreateBroadcastPacket(parameters, transactionId);
var broadcastPacketBytes = _serializer.Serialize(broadcastPacket);
_logger.LogDebug("Sending broadcast DHCP Packet for transaction {0}", transactionId);
await udpClient
.SendAsync(broadcastPacketBytes, broadcastPacketBytes.Length, BroadcastEndpoint)
.WithCancellation(ct)
.ConfigureAwait(false);
}
await Task.Delay(parameters.Timeout, ct).ConfigureAwait(false);
_dhcpListener.PacketReceived -= ReceptionCallback;
if (results.Count == 0)
{
throw new TimeoutException($"No DHCP response recieved for transaction {transactionId}.");
}
return(results);
}
