private static IPAddress ResolveInWins(string netbios)
{
if (fWins == null)
{
// Add external configuration....
string wins = "wins2.cwru.edu"; // CWRU's wins server (129.22.4.11)
if (wins == null)
{
return(null);
}
if (Debug.DebugOn && Debug.DebugLevel >= Debug.Info)
{
Debug.WriteLine(Debug.Info, "Check name in WINS");
}
try
{
fWinsAddr = Dns.Resolve(wins).AddressList[0];
fWins = new NBTNameService();
}
catch (Exception)
{
return(null);
}
}
return(fWins.lookup(fWinsAddr, netbios));
}
/// <summary>
/// Creates the session request packet
/// </summary>
/// <remarks>
/// <pre>
/// SESSION REQUEST PACKET:
///
/// 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
/// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/// | TYPE | FLAGS | LENGTH |
/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/// | |
/// / CALLED NAME /
/// | |
/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/// | |
/// / CALLING NAME /
/// | |
/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/// </pre></remarks>
/// <param name="callname"> </param>
private byte[] MakeRequestPacket(string callname)
{
// build called and calling names
byte[] calledname = NBTNameService.buildSecondLevelEncodedName(callname); // NetBIOS.SMBSERVER_NAME
byte[] callingname = NBTNameService.buildSecondLevelEncodedName(fCallingName);
int packetsize = HDR_SIZE + calledname.Length + callingname.Length;
byte[] packet = new byte[packetsize];
// set packet header
packet[HDR_TYPE_1] = SPT_REQUEST;
packet[HDR_FLAGS_1] = 0;
SetShortAt(HDR_LENGTH_2, packet, (short)(packetsize - HDR_SIZE));
int pos = RQ_CALLED_NAME_32;
for (int i = 0; i < calledname.Length; i++)
{
packet[pos++] = calledname[i];
}
for (int i = 0; i < callingname.Length; i++)
{
packet[pos++] = callingname[i];
}
return(packet);
}
public void DoCall(string netbiosname)
{
lock(this) // This entire method needs to be synchronized
{
// int retry_count = 0;
int port = SSN_SRVC_TCP_PORT;
InetAddress = NbtNameResolver.Resolve(netbiosname);
// Get the real NetBIOS name & Workgroup from an IP
NBTNameService ns = new NBTNameService();
NbInfo info = ns.queryStatus(InetAddress);
NetBiosName = info.Name;
WorkgroupName = info.Workgroup;
// If we couldn't resolve the name, then the host either doesn't
// exist or does not support CIFS.
if(NetBiosName == null)
throw new CifsIoException("CM2", InetAddress.ToString());
DoConnect(InetAddress, port);
byte[] packet = MakeRequestPacket(NetBiosName);
if(Debug.DebugOn && Debug.DebugLevel >= Debug.Info)
{
Debug.WriteLine(Debug.Info, "NetBIOS: doCall");
Debug.WriteLine(Debug.Info, "Called name=" + NetBiosName);
Debug.WriteLine(Debug.Info, "Calling name=" + fCallingName);
Debug.WriteLine(Debug.Info, "Called addr=" + InetAddress.ToString());
if(Debug.DebugLevel >= Debug.Buffer)
{
Debug.WriteLine(Debug.Buffer, "Packet to send:");
Debug.WriteLine(Debug.Buffer, packet, 0, packet.Length);
}
}
try
{
fOutput.Write(packet, 0, packet.Length);
fOutput.Flush();
}
catch(IOException e)
{
DoHangup();
throw new CifsIoException("NB500").setDetail(e);
}
// read header
try
{
int count = Read(packet, 0, HDR_SIZE);
if(Debug.DebugOn && Debug.DebugLevel >= Debug.Buffer)
{
Debug.WriteLine(Debug.Buffer, "Recieved packet:");
Debug.WriteLine(Debug.Buffer, packet, 0, packet.Length);
}
if(count < HDR_SIZE)
{
DoHangup();
throw new CifsIoException("NB501");
}
byte type = packet[HDR_TYPE_1];
switch(type)
{
case SPT_POS_RESPONSE:
/*
POSITIVE SESSION RESPONSE PACKET
1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| TYPE | FLAGS | LENGTH |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
break;
case SPT_NEG_RESPONSE:
/*
NEGATIVE SESSION RESPONSE PACKET
1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| TYPE | FLAGS | LENGTH |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ERROR_CODE |
+-+-+-+-+-+-+-+-+
*/
int rc = fInput.ReadByte();
Debug.WriteLine(Debug.Error, "NetBIOS: Negative response: " + rc);
DoHangup();
throw CifsIoException.getNBException(rc & 0xff);
case SPT_RTG_RESPONSE:
/*
SESSION RETARGET RESPONSE PACKET
1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| TYPE | FLAGS | LENGTH |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| RETARGET_IP_ADDRESS |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PORT |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
count = Read(packet, 0, RT_SIZE);
DoHangup();
throw new CifsIoException("NB502");
default:
DoHangup();
throw new CifsRuntimeException("NB503", (Int32)type );
}
}
catch(IOException e)
{
DoHangup();
throw new CifsIoException("NB501").setDetail(e);
}
}
}
public void DoCall(string netbiosname)
{
lock (this) // This entire method needs to be synchronized
{
// int retry_count = 0;
int port = SSN_SRVC_TCP_PORT;
InetAddress = NbtNameResolver.Resolve(netbiosname);
// Get the real NetBIOS name & Workgroup from an IP
NBTNameService ns = new NBTNameService();
NbInfo info = ns.queryStatus(InetAddress);
NetBiosName = info.Name;
WorkgroupName = info.Workgroup;
// If we couldn't resolve the name, then the host either doesn't
// exist or does not support CIFS.
if (NetBiosName == null)
{
throw new CifsIoException("CM2", InetAddress.ToString());
}
DoConnect(InetAddress, port);
byte[] packet = MakeRequestPacket(NetBiosName);
if (Debug.DebugOn && Debug.DebugLevel >= Debug.Info)
{
Debug.WriteLine(Debug.Info, "NetBIOS: doCall");
Debug.WriteLine(Debug.Info, "Called name=" + NetBiosName);
Debug.WriteLine(Debug.Info, "Calling name=" + fCallingName);
Debug.WriteLine(Debug.Info, "Called addr=" + InetAddress.ToString());
if (Debug.DebugLevel >= Debug.Buffer)
{
Debug.WriteLine(Debug.Buffer, "Packet to send:");
Debug.WriteLine(Debug.Buffer, packet, 0, packet.Length);
}
}
try
{
fOutput.Write(packet, 0, packet.Length);
fOutput.Flush();
}
catch (IOException e)
{
DoHangup();
throw new CifsIoException("NB500").setDetail(e);
}
// read header
try
{
int count = Read(packet, 0, HDR_SIZE);
if (Debug.DebugOn && Debug.DebugLevel >= Debug.Buffer)
{
Debug.WriteLine(Debug.Buffer, "Recieved packet:");
Debug.WriteLine(Debug.Buffer, packet, 0, packet.Length);
}
if (count < HDR_SIZE)
{
DoHangup();
throw new CifsIoException("NB501");
}
byte type = packet[HDR_TYPE_1];
switch (type)
{
case SPT_POS_RESPONSE:
/*
* POSITIVE SESSION RESPONSE PACKET
*
* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| TYPE | FLAGS | LENGTH |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
break;
case SPT_NEG_RESPONSE:
/*
* NEGATIVE SESSION RESPONSE PACKET
*
* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| TYPE | FLAGS | LENGTH |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ERROR_CODE |
+-+-+-+-+-+-+-+-+
*/
int rc = fInput.ReadByte();
Debug.WriteLine(Debug.Error, "NetBIOS: Negative response: " + rc);
DoHangup();
throw CifsIoException.getNBException(rc & 0xff);
case SPT_RTG_RESPONSE:
/*
* SESSION RETARGET RESPONSE PACKET
*
* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| TYPE | FLAGS | LENGTH |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| RETARGET_IP_ADDRESS |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| PORT |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
count = Read(packet, 0, RT_SIZE);
DoHangup();
throw new CifsIoException("NB502");
default:
DoHangup();
throw new CifsRuntimeException("NB503", (Int32)type);
}
}
catch (IOException e)
{
DoHangup();
throw new CifsIoException("NB501").setDetail(e);
}
}
}
private static IPAddress ResolveInWins(string netbios)
{
if(fWins == null)
{
// Add external configuration....
string wins = "wins2.cwru.edu"; // CWRU's wins server (129.22.4.11)
if(wins == null)
return null;
if(Debug.DebugOn && Debug.DebugLevel >= Debug.Info)
Debug.WriteLine(Debug.Info, "Check name in WINS");
try
{
fWinsAddr = Dns.Resolve(wins).AddressList[0];
fWins = new NBTNameService();
}
catch(Exception)
{
return null;
}
}
return fWins.lookup(fWinsAddr, netbios);
}