Does unbound support multiple questions in one query?

Unbound
1

I sent a query that includes 2 questions to unbound and received a “format error” response,dose unbount support this?Or I should add a special configuration?

I’m sure that the query I sent has right format,you can see the format as below(mtlxy.com is a local zone and has the www and ftp records):

Domain Name System (query)
[Response In: 2]
Transaction ID: 0x0000
Flags: 0x0100 (Standard query)
0… … … … = Response: Message is a query
.000 0… … … = Opcode: Standard query (0)
… ..0. … … = Truncated: Message is not truncated
… …1 … … = Recursion desired: Do query recursively
… … .0.. … = Z: reserved (0)
… … …0 … = Non-authenticated data OK: Non-authenticated data is unacceptable
Questions: 2
Answer RRs: 0
Authority RRs: 0
Additional RRs: 0
Queries
www.mtlxy.com: type A, class IN
Name: www.mtlxy.com
Type: A (Host address)
Class: IN (0x0001)
ftp.mtlxy.com: type A, class IN
Name: ftp.mtlxy.com
Type: A (Host address)
Class: IN (0x0001)


Best Regards,
Tao Ma
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2

a message of 109 lines which said:

I sent a query that includes 2 questions to unbound and received a
"format error" response,dose unbount support this?

No name server I know support multiple questions. They are
theorically possible but creating an answer is often impossible (there
is only one RCODE in the answer, for instance, while the two questions
may yield different results, for instance NOERROR and NXDOMAIN).

There is, from time to time, at the IETF, attempt to standardize a
working subset of "multiple questions queries" (for instance by
requiring that the two QNAMEs are identical) but no result yet.

3

Stephane,thank you very much for your answer!

Best Regards,
Tao Ma


— 09年9月21日，周一, Stephane Bortzmeyer bortzmeyer@nic.fr 写道：


> 发件人: Stephane Bortzmeyer bortzmeyer@nic.fr
> 主题: Re: Does unbound support multiple questions in one query?
> 收件人: “Tao Ma” matao_reg@yahoo.com.cn
> 抄送: unbound-users@unbound.net
> 日期: 2009年9月21日,周一,下午4:37
>
> On Mon, Sep 21, 2009 at 04:18:38PM +0800,
> Tao Ma matao_reg@yahoo.com.cn wrote
> a message of 109 lines which said:
>
> > I sent a query that includes 2 questions to unbound and received a
> > “format error” response,dose unbount support this?
>
> No name server I know support multiple questions. They are
> theorically possible but creating an answer is often impossible (there
> is only one RCODE in the answer, for instance, while the two questions
> may yield different results, for instance NOERROR and NXDOMAIN).
>
> There is, from time to time, at the IETF, attempt to standardize a
> working subset of “multiple questions queries” (for instance by
> requiring that the two QNAMEs are identical) but no result yet.

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