public static async Task <DeviceInformation> Parse(IPEndPoint endpoint, byte[] packet)
{
var version = packet[0];
var cmd = packet[1];
var length = packet[2];
if (length + 4 > packet.Length)
{
return(null);
}
if (version == 1 && cmd == 0 && length == 0)
{
return(null); // drop ubnt-dp request
}
if (version == 1 && cmd == 0)
{
return(await Task.FromResult(DeviceInformationV1.Parse(packet)));
}
else if (version == 2)
{
return(await DeviceInformationV2.Parse(endpoint, cmd, packet));
}
else
{
return(null);
}
}
internal static DeviceInformationV1 Parse(byte[] data)
{
var msg = new DeviceInformationV1();
var i = 4;
while (i < data.Length)
{
var type = data[i++];
var piece = data.Skip(i).Take(2).Reverse().ToArray(); // endianness swap
var l = BitConverter.ToUInt16(piece, 0);
i += 2;
piece = data.Skip(i).Take(l).ToArray();
switch (type)
{
case PKT_V1_FWVERSION:
msg.Firmware = piece.ToString();
break;
case PKT_V1_HOSTNAME:
msg.Hostname = piece.ToString();
break;
case PKT_V1_IPINFO:
if (piece.Length == 10)
{
msg.MacAddress = BitConverter.ToString(piece.Take(6).ToArray());
msg.IPAddress = string.Join(".", piece.Skip(6).Take(4)); // aa.bb.cc.dd
}
break;
case PKT_V1_HWADDR:
msg.MacAddress = BitConverter.ToString(piece.Take(6).ToArray());
break;
case PKT_V1_WEBUI:
if (piece.Length == 4)
{
msg.WebPort = BitConverter.ToInt32(piece, 0) & 0xFFFF;
msg.IsHttps = ((BitConverter.ToInt32(piece, 0) >> 16) & 0xFFFF) > 0;
}
break;
case PKT_V1_WMODE:
if (piece.Length == 4)
{
msg.WMode = BitConverter.ToInt32(piece, 0);
// Docs indicate this as being UniFi Video-specific
// 0x101 or 0x102 means the device has gone through wizard
msg.IsSetup = true;
if (msg.WMode == 0x100)
{
msg.IsSetup = false;
}
}
break;
case PKT_V1_ESSID:
msg.ESSID = ASCIIEncoding.ASCII.GetString(piece);
break;
case PKT_V1_MODEL:
msg.Model = ASCIIEncoding.ASCII.GetString(piece);
break;
case PKT_V1_PLATFORM:
msg.Platform = ASCIIEncoding.ASCII.GetString(piece);
break;
}
i += 1;
}
return(msg);
}