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Date: Wed, 22 Jul 2026 12:55:28 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Aaron Conole <aconole@redhat.com>
Cc: houminxi@gmail.com, netdev@vger.kernel.org, davem@davemloft.net,
 edumazet@google.com, pabeni@redhat.com, i.maximets@ovn.org,
 echaudro@redhat.com
Subject: Re: [net-next,v4] selftests/net/openvswitch: add SCTP flow key test
Message-ID: <20260722125528.0f192cca@kernel.org>
In-Reply-To: <f7to6g1q1ct.fsf@redhat.com>
References: <20260719162657.3263089-1-houminxi@gmail.com>
	<f7to6g1q1ct.fsf@redhat.com>
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On Mon, 20 Jul 2026 08:42:10 -0400 Aaron Conole wrote:
> > +# sctp_connect_v4 test
> > +# - sctp(dst=4443) matches client-to-server INIT
> > +# - sctp(src=4443) matches server-to-client INIT-ACK
> > +# - remove flows and verify connection fails, reinstall and recover
> > +test_sctp_connect_v4() {
> > +	local t="test_sctp_connect_v4"
> > +
> > +	which nc >/dev/null 2>&1 || return $ksft_skip
> > +	nc --sctp -z 127.0.0.1 1 </dev/null 2>/dev/null || return $ksft_skip  
> 
> This can probably be instead::
> 
>   nc --help 2>&1 | grep -q -- --sctp || return $ksft_skip
> 
> This reads nicer to detect SCTP support in 'nc' binary.

Can we use socat ? nc incompatibilities are hard to deal with.