/// <summary>
/// Parses a packet and gets a response packet from the handler
/// </summary>
internal void ParseAndProcess(byte[] packetBytes, IPEndPoint remoteEndpoint)
{
IPEndPoint proxyEndpoint = null;
if (IsProxyProtocol(packetBytes, out var sourceEndpoint, out var requestWithoutProxyHeader))
{
packetBytes = requestWithoutProxyHeader;
proxyEndpoint = remoteEndpoint;
remoteEndpoint = sourceEndpoint;
}
ClientConfiguration clientConfiguration = null;
if (RadiusPacketNasIdentifierParser.TryParse(packetBytes, out var nasIdentifier))
{
clientConfiguration = _serviceConfiguration.GetClient(nasIdentifier);
}
if (clientConfiguration == null)
{
clientConfiguration = _serviceConfiguration.GetClient(remoteEndpoint.Address);
}
if (clientConfiguration == null)
{
_logger.Warning("Received packet from unknown client {host:l}:{port}, ignoring", remoteEndpoint.Address, remoteEndpoint.Port);
return;
}
var requestPacket = _radiusPacketParser.Parse(packetBytes, Encoding.UTF8.GetBytes(clientConfiguration.RadiusSharedSecret));
var isRetransmission = _cacheService.IsRetransmission(requestPacket, remoteEndpoint);
if (isRetransmission)
{
_logger.Debug("Retransmissed request from {host:l}:{port} id={id} client '{client:l}', ignoring", remoteEndpoint.Address, remoteEndpoint.Port, requestPacket.Identifier, clientConfiguration.Name);
return;
}
if (proxyEndpoint != null)
{
if (requestPacket.Code == PacketCode.StatusServer)
{
_logger.Information("Received {code:l} from {host:l}:{port} proxied by {proxyhost:l}:{proxyport} id={id} client '{client:l}'", requestPacket.Code.ToString(), remoteEndpoint.Address, remoteEndpoint.Port, proxyEndpoint.Address, proxyEndpoint.Port, requestPacket.Identifier, clientConfiguration.Name);
}
else
{
_logger.Information("Received {code:l} from {host:l}:{port} proxied by {proxyhost:l}:{proxyport} id={id} user='******' client '{client:l}'", requestPacket.Code.ToString(), remoteEndpoint.Address, remoteEndpoint.Port, proxyEndpoint.Address, proxyEndpoint.Port, requestPacket.Identifier, requestPacket.UserName, clientConfiguration.Name);
}
}
else
{
if (requestPacket.Code == PacketCode.StatusServer)
{
_logger.Debug("Received {code:l} from {host:l}:{port} id={id} client '{client:l}'", requestPacket.Code.ToString(), remoteEndpoint.Address, remoteEndpoint.Port, requestPacket.Identifier, clientConfiguration.Name);
}
else
{
_logger.Information("Received {code:l} from {host:l}:{port} id={id} user='******' client '{client:l}'", requestPacket.Code.ToString(), remoteEndpoint.Address, remoteEndpoint.Port, requestPacket.Identifier, requestPacket.UserName, clientConfiguration.Name);
}
}
var request = new PendingRequest {
RemoteEndpoint = remoteEndpoint, ProxyEndpoint = proxyEndpoint, RequestPacket = requestPacket
};
Task.Run(async() => await _router.HandleRequest(request, clientConfiguration));
}