AddGroupNameResponse Frame from WinNT May Cause WFWG to Hang

MORE INFORMATION

A NetBIOS application may register a group name using the AddGroupName command. NetBEUI then sends an AddGroupName Multicast frame on the network. If the name is already registered as a unique name by Windows NT 3.51 (or 4.0), the Windows NT computer sends an AddNameResponse frame. The Data2 field of the AddNameResponse frame indicates whether the name is registered by the Windows NT computer as a GroupName or UniqueName. The Windows NT computer was incorrectly setting this field to indicate that it had registered the name as a GroupName. More than one computer can register a NetBIOS name as a group name. However, a NetBIOS name cannot be registered as both a group name and a unique name. If the Data2 of the AddNameResponse frame from Windows NT was set correctly to UniqueName, then Windows for Workgroups would have presented the error to the user because the name was already in use.

18 109.128 COMPAQ50E3CC MKWFW NETBIOS Add Name Response (0x0D)
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NETBIOS: Add Name Response (0x0D)
    NETBIOS: Length = 44 (0x002C)
    NETBIOS: Signature = 0xEFFF
    NETBIOS: Command = Add Name Response (0x0D)
    NETBIOS: Data1 = 0x00
    NETBIOS: Data2 = 0x0001 <<<<*******should be 0*******
    NETBIOS: Transmit Correlator = 0x0002
    NETBIOS: Destination Name = BEETLE         <00>
    NETBIOS: SMB Name Type = Workstation (00)
    NETBIOS: Node address = 202020202000