question about multiple queries in a single dns packet

[Federico Barbieri]

Not sure if this is the right place to ask but I've been trying to dig
around and found nothing...

reading the dns specification it would seems possible to send multiple
request in a single packet.

there is a "QDCOUNT" WORD which would suggest it can be done but I can't
find any implementaiton that will support it and when I try to forge a
packet I'm getting "format error" back from the bind server.

0000   00 c0 4f 21 a0 22 00 18 8b 5d 54 67 08 00 45 00  ..O!."...]Tg..E.
0010   00 50 40 31 00 00 80 11 00 00 0a 02 01 03 c6 29  .P at 1...........)
0020   00 04 0d c8 00 35 00 3c f9 fb 09 fc 01 00 00 02  .....5.<........
0030   00 00 00 00 00 00 03 77 77 77 06 67 6f 6f 67 6c  .......www.googl
0040   65 03 63 6f 6d 00 00 01 00 01 03 77 77 77 06 67  e.com......www.g
0050   6f 6f 67 6c 65 03 63 6f 6d 00 00 01 00 01        oogle.com.....

wireshark is reading the packed right it seems (see attached). But bind is
not answering.

is bind lacking the capability or is there something I am doing wrong?

any help would be much appreciated.

TIA

fede
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