internal static NbtAddress GetByName(Name name)
{
lock (typeof(Lmhosts))
{
NbtAddress result = null;
try
{
if (Filename != null)
{
FilePath f = new FilePath(Filename);
long lm;
if ((lm = f.LastModified()) > _lastModified)
{
_lastModified = lm;
Tab.Clear();
_alt = 0;
Populate(new FileReader(f));
}
result = (NbtAddress)Tab[name];
}
}
catch (FileNotFoundException fnfe)
{
if (_log.Level > 1)
{
_log.WriteLine("lmhosts file: " + Filename);
Runtime.PrintStackTrace(fnfe, _log);
}
}
catch (IOException ioe)
{
if (_log.Level > 0)
{
Runtime.PrintStackTrace(ioe, _log);
}
}
return result;
}
}
internal virtual int ReadResourceRecordWireFormat(byte[] src, int srcIndex)
{
int start = srcIndex;
int end;
if ((src[srcIndex] & unchecked(0xC0)) == unchecked(0xC0))
{
RecordName = QuestionName;
// label string pointer to questionName
srcIndex += 2;
}
else
{
srcIndex += RecordName.ReadWireFormat(src, srcIndex);
}
RecordType = ReadInt2(src, srcIndex);
srcIndex += 2;
RecordClass = ReadInt2(src, srcIndex);
srcIndex += 2;
Ttl = ReadInt4(src, srcIndex);
srcIndex += 4;
RDataLength = ReadInt2(src, srcIndex);
srcIndex += 2;
AddrEntry = new NbtAddress[RDataLength / 6];
end = srcIndex + RDataLength;
for (AddrIndex = 0; srcIndex < end; AddrIndex++)
{
srcIndex += ReadRDataWireFormat(src, srcIndex);
}
return srcIndex - start;
}
internal NodeStatusResponse(NbtAddress queryAddress)
{
this._queryAddress = queryAddress;
RecordName = new Name();
_macAddress = new byte[6];
}
/// <exception cref="System.IO.IOException"></exception>
internal virtual void Ssn139()
{
Name calledName = new Name(Address.FirstCalledName(), 0x20, null
);
do
{
Socket = new SocketEx(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
if (LocalAddr != null)
{
Socket.Bind2(new IPEndPoint(LocalAddr, LocalPort));
}
Socket.Connect(new IPEndPoint(IPAddress.Parse(Address.GetHostAddress()), 139), SmbConstants.ConnTimeout);
Socket.SoTimeOut = SmbConstants.SoTimeout;
Out = Socket.GetOutputStream();
In = Socket.GetInputStream();
SessionServicePacket ssp = new SessionRequestPacket(calledName, NbtAddress.GetLocalName
());
Out.Write(Sbuf, 0, ssp.WriteWireFormat(Sbuf, 0));
if (Readn(In, Sbuf, 0, 4) < 4)
{
try
{
Socket.Dispose();
}
catch (IOException)
{
}
throw new SmbException("EOF during NetBIOS session request");
}
switch (Sbuf[0] & 0xFF)
{
case SessionServicePacket.PositiveSessionResponse:
{
if (Log.Level >= 4)
{
Log.WriteLine("session established ok with " + Address);
}
return;
}
case SessionServicePacket.NegativeSessionResponse:
{
int errorCode = In.Read() & 0xFF;
switch (errorCode)
{
case NbtException.CalledNotPresent:
case NbtException.NotListeningCalled:
{
Socket.Dispose();
break;
}
default:
{
Disconnect(true);
throw new NbtException(NbtException.ErrSsnSrvc, errorCode);
}
}
break;
}
case -1:
{
Disconnect(true);
throw new NbtException(NbtException.ErrSsnSrvc, NbtException.ConnectionRefused
);
}
default:
{
Disconnect(true);
throw new NbtException(NbtException.ErrSsnSrvc, 0);
}
}
}
while ((calledName.name = Address.NextCalledName()) != null);
throw new IOException("Failed to establish session with " + Address);
}
public SessionRequestPacket(Name calledName, Name callingName)
{
Type = SessionRequest;
this._calledName = calledName;
this._callingName = callingName;
}
public SessionRequestPacket()
{
_calledName = new Name();
_callingName = new Name();
}
static NbtAddress()
{
IPAddress localInetAddress;
string localHostname;
Name localName;
AddressCache.Put(UnknownName, new CacheEntry(UnknownName, UnknownAddress
, Forever));
localInetAddress = Client.laddr;
if (localInetAddress == null)
{
try
{
localInetAddress = Extensions.GetAddressByName("127.0.0.1");
}
catch (UnknownHostException)
{
}
}
localHostname = Config.GetProperty("jcifs.netbios.hostname", null);
if (string.IsNullOrEmpty(localHostname))
{
byte[] addr = localInetAddress.GetAddressBytes();
/*localHostname = "JCIFS" + (addr[2] & unchecked((int)(0xFF))) + "_" + (addr[3] & unchecked(
(int)(0xFF))) + "_" + Hexdump.ToHexString((int)(new Random().NextDouble() * (double)unchecked(
(int)(0xFF))), 2);*/
localHostname = "JCIFS_127_0_0_1";
}
localName = new Name(localHostname, unchecked(0x00), Config.GetProperty("jcifs.netbios.scope"
, null));
Localhost = new NbtAddress(localName, localInetAddress.GetHashCode(), false, BNode
, false, false, true, false, UnknownMacAddress);
CacheAddress(localName, Localhost, Forever);
}
private static void UpdateLookupTable(Name name)
{
lock (LookupTable)
{
//Sharpen.Collections.Remove(LOOKUP_TABLE, name);
LookupTable.Remove(name);
Runtime.NotifyAll(LookupTable);
}
}
/// <exception cref="UnknownHostException"></exception>
internal static NbtAddress DoNameQuery(Name name, IPAddress svr)
{
NbtAddress addr;
if (name.HexCode == unchecked(0x1d) && svr == null)
{
svr = Client.Baddr;
}
// bit of a hack but saves a lookup
name.SrcHashCode = svr != null ? svr.GetHashCode() : 0;
addr = GetCachedAddress(name);
if (addr == null)
{
if ((addr = (NbtAddress)CheckLookupTable(name)) == null)
{
try
{
addr = Client.GetByName(name, svr);
}
catch (UnknownHostException)
{
addr = UnknownAddress;
}
finally
{
CacheAddress(name, addr);
UpdateLookupTable(name);
}
}
}
if (addr == UnknownAddress)
{
throw new UnknownHostException(name.ToString());
}
return addr;
}
private static object CheckLookupTable(Name name)
{
object obj;
lock (LookupTable)
{
if (LookupTable.ContainsKey(name) == false)
{
LookupTable.Put(name, name);
return null;
}
while (LookupTable.ContainsKey(name))
{
try
{
Runtime.Wait(LookupTable);
}
catch (Exception)
{
}
}
}
obj = GetCachedAddress(name);
if (obj == null)
{
lock (LookupTable)
{
LookupTable.Put(name, name);
}
}
return obj;
}
internal static NbtAddress GetCachedAddress(Name hostName)
{
if (CachePolicy == 0)
{
return null;
}
lock (AddressCache)
{
CacheEntry entry = (CacheEntry)AddressCache.Get(hostName);
if (entry != null && entry.Expiration < Runtime.CurrentTimeMillis() && entry.Expiration
>= 0)
{
entry = null;
}
return entry != null ? entry.Address : null;
}
}
internal static void CacheAddress(Name hostName, NbtAddress addr, long expiration
)
{
if (CachePolicy == 0)
{
return;
}
lock (AddressCache)
{
CacheEntry entry = (CacheEntry)AddressCache.Get(hostName);
if (entry == null)
{
entry = new CacheEntry(hostName, addr, expiration);
AddressCache.Put(hostName, entry);
}
else
{
entry.Address = addr;
entry.Expiration = expiration;
}
}
}
internal static void CacheAddress(Name hostName, NbtAddress addr)
{
if (CachePolicy == 0)
{
return;
}
long expiration = -1;
if (CachePolicy != Forever)
{
expiration = Runtime.CurrentTimeMillis() + CachePolicy * 1000;
}
CacheAddress(hostName, addr, expiration);
}
/// <exception cref="UnknownHostException"></exception>
internal virtual NbtAddress[] GetAllByName(Name name, IPAddress addr)
{
int n;
NameQueryRequest request = new NameQueryRequest(name);
NameQueryResponse response = new NameQueryResponse();
request.Addr = addr ?? NbtAddress.GetWinsAddress();
request.IsBroadcast = request.Addr == null;
if (request.IsBroadcast)
{
request.Addr = Baddr;
n = RetryCount;
}
else
{
request.IsBroadcast = false;
n = 1;
}
do
{
try
{
Send(request, response, RetryTimeout);
}
catch (IOException ioe)
{
if (_log.Level > 1)
{
Runtime.PrintStackTrace(ioe, _log);
}
throw new UnknownHostException(ioe);
}
if (response.Received && response.ResultCode == 0)
{
return response.AddrEntry;
}
}
while (--n > 0 && request.IsBroadcast);
throw new UnknownHostException();
}
internal NbtAddress(Name hostName, int address, bool groupName, int nodeType)
{
this.HostName = hostName;
this.Address = address;
this.GroupName = groupName;
this.NodeType = nodeType;
}
/// <exception cref="UnknownHostException"></exception>
internal virtual NbtAddress GetByName(Name name, IPAddress addr)
{
int n;
NameQueryRequest request = new NameQueryRequest(name);
NameQueryResponse response = new NameQueryResponse();
if (addr != null)
{
request.Addr = addr;
request.IsBroadcast = (addr.GetAddressBytes()[3] == unchecked(unchecked(0xFF)));
n = RetryCount;
do
{
try
{
Send(request, response, RetryTimeout);
}
catch (IOException ioe)
{
if (_log.Level > 1)
{
Runtime.PrintStackTrace(ioe, _log);
}
throw new UnknownHostException(ioe);
}
if (response.Received && response.ResultCode == 0
&& response.IsResponse)
{
int last = response.AddrEntry.Length - 1;
response.AddrEntry[last].HostName.SrcHashCode = addr.GetHashCode();
return response.AddrEntry[last];
}
}
while (--n > 0 && request.IsBroadcast);
throw new UnknownHostException();
}
for (int i = 0; i < _resolveOrder.Length; i++)
{
try
{
switch (_resolveOrder[i])
{
case ResolverLmhosts:
{
NbtAddress ans = Lmhosts.GetByName(name);
if (ans != null)
{
ans.HostName.SrcHashCode = 0;
// just has to be different
// from other methods
return ans;
}
break;
}
case ResolverWins:
case ResolverBcast:
{
if (_resolveOrder[i] == ResolverWins && name.name != NbtAddress.MasterBrowserName
&& name.HexCode != unchecked(0x1d))
{
request.Addr = NbtAddress.GetWinsAddress();
request.IsBroadcast = false;
}
else
{
request.Addr = Baddr;
request.IsBroadcast = true;
}
n = RetryCount;
while (n-- > 0)
{
try
{
Send(request, response, RetryTimeout);
}
catch (IOException ioe)
{
if (_log.Level > 1)
{
Runtime.PrintStackTrace(ioe, _log);
}
throw new UnknownHostException(ioe);
}
if (response.Received && response.ResultCode == 0
&& response.IsResponse)
{
response.AddrEntry[0].HostName.SrcHashCode = request.Addr.GetHashCode();
return response.AddrEntry[0];
}
if (_resolveOrder[i] == ResolverWins)
{
break;
}
}
break;
}
}
}
catch (IOException)
{
}
}
throw new UnknownHostException();
}
internal NbtAddress(Name hostName, int address, bool groupName, int nodeType, bool
isBeingDeleted, bool isInConflict, bool isActive, bool isPermanent, byte[] macAddress
)
{
this.HostName = hostName;
this.Address = address;
this.GroupName = groupName;
this.NodeType = nodeType;
this.isBeingDeleted = isBeingDeleted;
this.isInConflict = isInConflict;
this.isActive = isActive;
this.isPermanent = isPermanent;
this.MacAddress = macAddress;
IsDataFromNodeStatus = true;
}
/// <exception cref="System.IO.IOException"></exception>
internal static void Populate(StreamReader r)
{
string line;
BufferedReader br = new BufferedReader((InputStreamReader)r);
while ((line = br.ReadLine()) != null)
{
line = line.ToUpper().Trim();
if (line.Length == 0)
{
}
else
{
if (line[0] == '#')
{
if (line.StartsWith("#INCLUDE "))
{
line = Runtime.Substring(line, line.IndexOf('\\'));
string url = "smb:" + line.Replace('\\', '/');
if (_alt > 0)
{
try
{
Populate(new InputStreamReader(new SmbFileInputStream(url)));
}
catch (IOException ioe)
{
_log.WriteLine("lmhosts URL: " + url);
Runtime.PrintStackTrace(ioe, _log);
continue;
}
_alt--;
while ((line = br.ReadLine()) != null)
{
line = line.ToUpper().Trim();
if (line.StartsWith("#END_ALTERNATE"))
{
break;
}
}
}
else
{
Populate(new InputStreamReader(new SmbFileInputStream(url)));
}
}
else
{
if (line.StartsWith("#BEGIN_ALTERNATE"))
{
_alt++;
}
else
{
if (line.StartsWith("#END_ALTERNATE") && _alt > 0)
{
_alt--;
throw new IOException("no lmhosts alternate includes loaded");
}
}
}
}
else
{
if (char.IsDigit(line[0]))
{
char[] data = line.ToCharArray();
int ip;
int i;
int j;
Name name;
NbtAddress addr;
char c;
c = '.';
ip = i = 0;
for (; i < data.Length && c == '.'; i++)
{
int b = unchecked(0x00);
for (; i < data.Length && (c = data[i]) >= 48 && c <= 57; i++)
{
b = b * 10 + c - '0';
}
ip = (ip << 8) + b;
}
while (i < data.Length && char.IsWhiteSpace(data[i]))
{
i++;
}
j = i;
while (j < data.Length && char.IsWhiteSpace(data[j]) == false)
{
j++;
}
name = new Name(Runtime.Substring(line, i, j), unchecked(0x20), null
);
addr = new NbtAddress(name, ip, false, NbtAddress.BNode, false, false, true, true
, NbtAddress.UnknownMacAddress);
Tab.Put(name, addr);
}
}
}
}
}
internal CacheEntry(Name hostName, NbtAddress address, long expiration)
{
this.HostName = hostName;
this.Address = address;
this.Expiration = expiration;
}
