public void scan(string queryString, mDNSType queryType)
{
byte[] data;
byte[] query;
mDNSHeader header;
byte[] headerBytes;
IPEndPoint endpoint;
header = new mDNSHeader()
{
transactionID = 0, flags = 0, questions = NetworkUtils.NetworkToHostOrder16(1), answerRRs = 0, authorityRRs = 0, additionalRRs = 0
};
query = buildQuery(queryString, queryType);
headerBytes = header.GetBytes();
data = new byte[headerBytes.Length + query.Length];
headerBytes.CopyTo(data, 0);
query.CopyTo(data, headerBytes.Length);
endpoint = new IPEndPoint(IPAddress.Parse(multicastIP), port);
if (globalListener.inUse)
{
try
{
Logger.getInstance().WriteNet(Logger.DebugLevel.Debug, globalListener.endPoint, endpoint, ProtocolType.Udp, data);
globalListener.udp.Send(data, data.Length, endpoint);
}
catch
{
Logger.getInstance().WriteLine(Logger.DebugLevel.Error, String.Format("Error: mDNS.scan(): Unable to send data to {0}!", endpoint.ToString()));
}
}
if (interfacesListerner != null)
{
foreach (networkBundle net in interfacesListerner)
{
if (net.inUse)
{
try
{
Logger.getInstance().WriteNet(Logger.DebugLevel.Debug, net.endPoint, endpoint, ProtocolType.Udp, data);
net.udp.Send(data, data.Length, endpoint);
}
catch
{
Logger.getInstance().WriteLine(Logger.DebugLevel.Error, String.Format("Error: mDNS.scan(): Unable to send data to {0}!", endpoint.ToString()));
}
}
}
}
}
public override void reciever(IPEndPoint from, byte[] data)
{
mDNSHeader header;
int headerSize;
int expectedQueries, expectedAnwers;
int position;
headerSize = typeof(mDNSHeader).StructLayoutAttribute.Size;
if (data.Length <= headerSize)
{
Logger.getInstance().WriteLine(Logger.DebugLevel.Warn, "Warning: mDNS.reciever(): invalid packet size.");
Logger.getInstance().WriteData(Logger.DebugLevel.Warn, data);
return;
}
header = data.GetStruct <mDNSHeader>();
expectedQueries = NetworkUtils.NetworkToHostOrder16(header.questions);
expectedAnwers = NetworkUtils.NetworkToHostOrder16(header.authorityRRs) + NetworkUtils.NetworkToHostOrder16(header.answerRRs) + NetworkUtils.NetworkToHostOrder16(header.additionalRRs);
if (expectedAnwers > 0)
{
position = headerSize;
try
{
readQueries(data, ref position, expectedQueries);
readAnswers(data, ref position, expectedAnwers);
}
catch (OverflowException ex)
{
Logger.getInstance().WriteLine(Logger.DebugLevel.Warn, String.Format("Warning: mDNS.reciever(): packet parsing overflow at position 0x{0:X}!", position));
Logger.getInstance().WriteLine(Logger.DebugLevel.Warn, ex.ToString());
Logger.getInstance().WriteData(Logger.DebugLevel.Warn, data);
}
}
}
public override void reciever(IPEndPoint from, byte[] data)
{
GigEVisionAckn answer;
UInt32 version;
string macAddress;
IPAddress ipv4;
string model;
string vendor;
string serial;
if (data.Length != typeof(GigEVisionAckn).StructLayoutAttribute.Size)
{
Logger.getInstance().WriteLine(Logger.DebugLevel.Warn, String.Format("Warning: GigEVision.reciever(): Invalid size packet recieved from {0}", from.ToString()));
return;
}
answer = data.GetStruct <GigEVisionAckn>();
if (NetworkUtils.NetworkToHostOrder16(answer.payloadLen) != data.Length - 8)
{
Logger.getInstance().WriteLine(Logger.DebugLevel.Warn, String.Format("Warning: GigEVision.reciever(): Invalid size payload length value (got value {0} while value {1} was expected) recieved from {2}",
NetworkUtils.NetworkToHostOrder16(answer.payloadLen), data.Length - 8, from.ToString()));
return;
}
version = ((UInt32)NetworkUtils.NetworkToHostOrder16(answer.plMajorVersion)) << 16 |
((UInt32)NetworkUtils.NetworkToHostOrder16(answer.plMinorVersion));
if (version != 0x00010002)
{
Logger.getInstance().WriteLine(Logger.DebugLevel.Warn, String.Format("Warning: GigEVision.reciever(): Invalid packet version (got value 0x{0:X8} while value 0x{1:X8} was expected) recieved from {2}",
version, 0x00010002, from.ToString()));
}
if (answer.plIPCurrentAddr != 0)
{
ipv4 = new IPAddress((long)answer.plIPCurrentAddr);
}
else
{
ipv4 = from.Address;
}
macAddress = String.Format("{0:X2}:{1:X2}:{2:X2}:{3:X2}:{4:X2}:{5:X2}",
answer.plMacAddress.byte00, answer.plMacAddress.byte01, answer.plMacAddress.byte02,
answer.plMacAddress.byte03, answer.plMacAddress.byte04, answer.plMacAddress.byte05);
serial = Encoding.UTF8.GetString(answer.plSerialNumber);
if (serial == "")
{
serial = macAddress;
}
vendor = Encoding.UTF8.GetString(answer.plManufacturer);
if (vendor == "")
{
vendor = name;
}
model = Encoding.UTF8.GetString(answer.plModel);
if (model == "")
{
model = Encoding.UTF8.GetString(answer.plUsername);
}
viewer.deviceFound(vendor, 0, ipv4, model, serial);
}
