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Date:   Fri, 28 Aug 2020 14:14:48 -0400
From:   Tong Zhang <>
To:     Pablo Neira Ayuso <>
Subject: Re: [PATCH] netfilter: nf_conntrack_sip: fix parsing error

Hi Pablo,
I'm not an expert in this networking stuff.
But from my point of view there's no point in checking if this
condition is always true.
There's also no need of returning anything from the
if they are all being ignored like this.

On Fri, Aug 28, 2020 at 2:07 PM Pablo Neira Ayuso <> wrote:
> Is this are real issue in your setup or probably some static analysis
> tool is reporting?
> You are right that ct_sip_parse_numerical_param() never returns < 0,
> however, looking at:
> see Page 161
> expires is optional, my understanding is that your patch is making
> this option mandatory.

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