nmblookup returns NULL mac Address from linux samba servers

[shivappa Sangapur]

Hi List,

When I was checking nmblookup utility, MAC address returned is always
00-00-00-00-00-00
#nmblookup -A 192.168.10.10

Looking up status of 192.168.10.10
        SHIVAPPAS     <00> -         H <ACTIVE>
        SHIVAPPAS     <03> -         H <ACTIVE>
        SHIVAPPAS     <20> -         H <ACTIVE>
        SHIVAPPAS     <1e> - <GROUP> H <ACTIVE>
        SHIVAPPAS     <00> - <GROUP> H <ACTIVE>

        MAC Address = 00-00-00-00-00-00

But there is one old thread on the same. The result is same even though
samba server is on same subnet (execute nmblookup on same samba server.)
https://lists.samba.org/archive/samba/1999-September/014495.html

This behavior is same in samba-4.5, 4.6.
Can somebody help me to identify the cause.
nmb->answers structure is always having 00000000 for mac address field.

Addition info: Windows clients return MAC address when nmblookup is executed
for windows IP.


Thanks & Regards,
Shivappa



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