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 async Task <DeviceInformationV2> Parse(IPEndPoint info, byte cmd, byte[] data)
{
var msg = new DeviceInformationV2();
var i = 4;
UInt16 l = 2;
msg.DiscoveredBy = 2;
if (cmd != 6 && cmd != 9 && cmd != 11)
{
return(null);
}
while (i < data.Length)
{
var type = data[i++];
var piece = new byte[] { data[i + 1], data[i] }; // endianness swap
l = BitConverter.ToUInt16(piece, 0);
i += 2;
piece = data.Skip(i).Take(l).ToArray();
switch (type)
{
case PKT_V2_FWVERSION:
msg.Firmware = piece.ToString();
break;
case PKT_V2_UPTIME:
msg.Uptime = TimeSpan.FromSeconds(BitConverter.ToInt32(piece, 0));
break;
case PKT_V2_HOSTNAME:
msg.Hostname = piece.ToString();
break;
case PKT_V2_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_V2_HWADDR:
msg.MacAddress = BitConverter.ToString(piece.Take(6).ToArray());
break;
case PKT_V2_WMODE:
if (piece.Length == 4)
{
msg.WMode = BitConverter.ToInt32(piece, 0);
}
break;
case PKT_V2_SEQ:
msg.Seq = BitConverter.ToInt32(piece, 0);
break;
case PKT_V2_SOURCE_MAC:
msg.SourceMac = BitConverter.ToString(piece);
break;
case PKT_V2_DEFAULT:
msg.IsDefault = piece[0] == 1;
break;
case PKT_V2_LOCATING:
msg.IsLocating = piece[0] == 1;
break;
case PKT_V2_DHCPC:
msg.IsDhcpClient = piece[0] == 1;
break;
case PKT_V2_DHCPC_BOUND:
msg.IsDhcpClientBound = piece[0] == 1;
break;
case PKT_V2_SSHD_PORT:
msg.SshdPort = BitConverter.ToInt32(piece, 0);
break;
case PKT_V2_REQ_FW:
msg.ReqFirmwareVersion = ASCIIEncoding.ASCII.GetString(piece);
break;
case PKT_V2_SHORT_VER:
msg.ShortVer = ASCIIEncoding.ASCII.GetString(piece);
break;
case PKT_V2_ESSID:
msg.ESSID = ASCIIEncoding.ASCII.GetString(piece);
break;
case PKT_V2_MODEL:
msg.Model = ASCIIEncoding.ASCII.GetString(piece);
break;
case PKT_V2_PLATFORM:
msg.Platform = ASCIIEncoding.ASCII.GetString(piece);
break;
}
i += l;
}
// TODO: (unimplemented)
// cmd == 6 -> set timestamp
// not sure on precision required for this
if (cmd == 1 && msg.SshdPort != default(int))
{
var udp = new UdpClient();
await udp.SendAsync(new byte[] { 0x02, 0x0a, 0x00, 0x00 }, 4, info);
}
return(msg);
}
