From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sven Schuster <schuster.sven@gmx.de>
Subject: Re: whether there are any packets in the ip_queue
Date: Tue, 20 Apr 2004 10:46:26 +0200
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To: "Jee J.Z." <jz105@york.ac.uk>
Cc: netfilter@lists.netfilter.org


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On Tue, Apr 20, 2004 at 01:16:17AM +0100, Jee J.Z. told us:
> Hi all,
>=20
> I am using libipq for userspace programming on netfilter. I am having
> problems to determine whether there are any packets in the ip_queue befor=
e I
> call the function ipq_read(). I just don't wish to call ipq_read() when
> there is no packet in the ip_queue, because I need my program to do other
> things rather than waiting for a packet arriving (after calling ipq_read(=
),
> the program will stop and wait for some time or until a packet coming from
> the kernel). Are there anybody on the list who has any idea about this?

Why don't you just call ipq_read with a negative timeout value?? When
there's no packet available it will return immediately with a return
code of 0. (see "man ipq_read")


HTH

Sven

>=20
> BTW, may I ask whether this is the proper list to ask about netfilter/lib=
ipq
> programming, since it seems few people on the list talking about this kind
> of questions?
>=20

--=20
Linux zion 2.6.6-rc1 #1 Sat Apr 17 11:50:12 CEST 2004 i686 athlon i386 GNU/=
Linux
 10:44:31  up 2 days, 17:42,  1 user,  load average: 0.00, 0.01, 0.00

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