TNG: nmblib.c loops

[Michael Breuer]

Using rpclient and attempting to log in to a W2K server, nmblib.c loops
at line 1008 (according to the log output of rpcclient).

Scenario:

I was experimenting with making samba a BDC to a W2K PDC.  I set up my
smb.conf file as-per the FAQ.  When I ran rpcclient to connect to the
PDC, rpclient hung.  With log level 100, I see many many messages of:

[2000/02/29 14:19:47, 100] libsmb/nmblib.c:(1008)
  receive_packet: 4 0

(approx 14/second).

Interspersed occasionally (about every 2 seconds) are:
[2000/02/29 14:19:46, 4] libsmb/nmblib.c:(109)
  nmb packet from <ip of samba server>(137) header: id=2862
opcode=Query(0) response=No
      header: flags: bcast=Yes rec_avail=No rec_des=Yes trunc=No auth=No

      header: rcode=0 qdcount=1 ancount=0 nscount=0 arcount=0
      question: q_name=<partial DNS name of PDC><20> q_type=32 q_class=1

[2000/02/29 14:19:46, 5] libsmb/nmblib.c:(752)
  Sending a packet of len 50 to (162.69.72.47) on port 137