/// <summary>
/// The NetBIOS naming convention allows for 16 characters in a NetBIOS name.
/// Microsoft, however, limits NetBIOS names to 15 characters and uses the 16th character as a NetBIOS suffix
/// See http://support.microsoft.com/kb/163409/en-us
/// </summary>
public static string GetMSNetBiosName(string name, NetBiosSuffix suffix)
{
if (name.Length > 15)
{
name = name.Substring(0, 15);
}
else if (name.Length < 15)
{
name = name.PadRight(15);
}
return(name + (char)suffix);
}
public string GetServerName()
{
NodeStatusRequest request = new NodeStatusRequest();
request.Header.QDCount = 1;
request.Question.Name = "*".PadRight(16, '\0');
NodeStatusResponse response = SendNodeStatusRequest(request);
foreach (KeyValuePair <string, NameFlags> entry in response.Names)
{
NetBiosSuffix suffix = NetBiosUtils.GetSuffixFromMSNetBiosName(entry.Key);
if (suffix == NetBiosSuffix.FileServiceService)
{
return(entry.Key);
}
}
return(null);
}
private void ReceiveCallback(IAsyncResult result)
{
if (!m_listening)
{
return;
}
IPEndPoint remoteEP = null;
byte[] buffer;
try
{
buffer = m_client.EndReceive(result, ref remoteEP);
}
catch (ObjectDisposedException)
{
return;
}
catch (SocketException)
{
return;
}
// Process buffer
if (buffer.Length > NameServicePacketHeader.Length)
{
NameServicePacketHeader header = new NameServicePacketHeader(buffer, 0);
if (header.OpCode == NameServiceOperation.QueryRequest)
{
NameQueryRequest request = null;
try
{
request = new NameQueryRequest(buffer, 0);
}
catch
{
}
if (request != null)
{
if (request.Question.Type == NameRecordType.NB)
{
string name = NetBiosUtils.GetNameFromMSNetBiosName(request.Question.Name);
NetBiosSuffix suffix = (NetBiosSuffix)request.Question.Name[15];
bool nameMatch = String.Equals(name, Environment.MachineName, StringComparison.OrdinalIgnoreCase);
if (nameMatch && ((suffix == NetBiosSuffix.WorkstationService) || (suffix == NetBiosSuffix.FileServiceService)))
{
PositiveNameQueryResponse response = new PositiveNameQueryResponse();
response.Header.TransactionID = request.Header.TransactionID;
response.Resource.Name = request.Question.Name;
NameFlags nameFlags = new NameFlags();
response.Addresses.Add(m_serverAddress.GetAddressBytes(), nameFlags);
byte[] responseBytes = response.GetBytes();
m_client.Send(responseBytes, responseBytes.Length, remoteEP);
}
}
else // NBStat
{
NodeStatusResponse response = new NodeStatusResponse();
response.Header.TransactionID = request.Header.TransactionID;
response.Resource.Name = request.Question.Name;
NameFlags nameFlags = new NameFlags();
string name1 = NetBiosUtils.GetMSNetBiosName(Environment.MachineName, NetBiosSuffix.WorkstationService);
string name2 = NetBiosUtils.GetMSNetBiosName(Environment.MachineName, NetBiosSuffix.FileServiceService);
NameFlags nameFlags3 = new NameFlags();
nameFlags3.WorkGroup = true;
string name3 = NetBiosUtils.GetMSNetBiosName(WorkgroupName, NetBiosSuffix.WorkstationService);
response.Names.Add(name1, nameFlags);
response.Names.Add(name2, nameFlags);
response.Names.Add(name3, nameFlags3);
byte[] responseBytes = response.GetBytes();
try
{
m_client.Send(responseBytes, responseBytes.Length, remoteEP);
}
catch (ObjectDisposedException)
{
}
}
}
}
}
try
{
m_client.BeginReceive(ReceiveCallback, null);
}
catch (ObjectDisposedException)
{
}
catch (SocketException)
{
}
}
public NameRegistrationRequest(string machineName, NetBiosSuffix suffix, IPAddress address) : this()
{
Question.Name = NetBiosUtils.GetMSNetBiosName(machineName, suffix);
Address = address.GetAddressBytes();
}
public static byte[] EncodeName(string name, NetBiosSuffix suffix, string scopeID)
{
string netBiosName = GetMSNetBiosName(name, suffix);
return(EncodeName(netBiosName, scopeID));
}
/// <summary>
/// The NetBIOS naming convention allows for 16 characters in a NetBIOS name.
/// Microsoft, however, limits NetBIOS names to 15 characters and uses the 16th character as a NetBIOS suffix
/// See http://support.microsoft.com/kb/163409/en-us
/// </summary>
public static string GetMSNetBiosName(string name, NetBiosSuffix suffix)
{
if (name.Length > 15)
{
name = name[..15];
