/// <summary>Tries to decode the specified packet.</summary>
/// <param name="e">The <see cref="UdpPacketEventArgs"/> instance containing the event data.</param>
/// <param name="result">The result.</param>
/// <returns></returns>
public static bool TryDecode(UdpPacketEventArgs e, out MDBBroadcastResult result)
{
result = null;
int size = e.Packet.Size;
byte[] data = e.Packet.Data;
if (data.Length > size)
{
data = data.GetRange(0, size);
}
if (!e.Packet.Data.StartsWith("[MDB]"))
{
data = data.Gunzip();
size = data.Length;
}
string content = Encoding.UTF8.GetString(data, 0, size);
var reader = IniReader.Parse("mdb", content);
if (reader.ReadSetting("MDB", "Version") != "4.0")
{
return(false);
}
result = new MDBBroadcastResult()
{
LastSeen = DateTime.Now,
Search = reader.ReadBool("MDB", "Search", false),
StreamBasePort = reader.ReadInt32("MDB", "Streams", 0),
Ports = reader.ReadSection("Ports").Select(p => int.Parse(p)).ToList(),
Addresses = reader.ReadSection("Addresses").Select(ip => IPAddress.Parse(ip)).ToList(),
Host = reader.ReadSetting("MDB", "Host")
};
return(true);
}
void SendAnswer(object sender, UdpPacketEventArgs e)
{
lock (this)
{
if (DateTime.Now > nextSend)
{
if (e.Packet.Data.StartsWith("[MDB]"))
{
var reader = IniReader.Parse("request", e.Packet.Data);
bool isSearch = reader.ReadBool("MDB", "Search", false);
if (isSearch)
{
this.LogDebug("Answering search of {0}", e.Packet.RemoteEndPoint);
try
{
if (DateTime.Now > nextUpdate)
{
UpdateConfig();
nextUpdate = DateTime.Now.AddSeconds(10);
}
sock.Send(config);
nextSend = DateTime.Now.AddSeconds(1);
}
catch (Exception ex)
{
this.LogError(ex, "Could not send broadcast answer to {0}", e.Packet.RemoteEndPoint);
}
}
}
}
}
}
/// <summary>Decodes the specified udp packet.</summary>
/// <param name="e">The <see cref="UdpPacketEventArgs"/> instance containing the event data.</param>
/// <returns></returns>
public static MDBBroadcastResult Decode(UdpPacketEventArgs e)
{
if (TryDecode(e, out MDBBroadcastResult result))
{
return(result);
}
throw new Exception("Invalid package data.");
}
