netdev - Re: [RFC PATCH net-next v4 1/4] flow_dissector: Add PPPoE dissectors

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Date:   Sun, 17 Jul 2022 13:15:23 +0200
From:   Guillaume Nault <gnault@...hat.com>
To:     "Drewek, Wojciech" <wojciech.drewek@...el.com>
Cc:     Marcin Szycik <marcin.szycik@...ux.intel.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "xiyou.wangcong@...il.com" <xiyou.wangcong@...il.com>,
        "Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
        "gustavoars@...nel.org" <gustavoars@...nel.org>,
        "baowen.zheng@...igine.com" <baowen.zheng@...igine.com>,
        "boris.sukholitko@...adcom.com" <boris.sukholitko@...adcom.com>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "jhs@...atatu.com" <jhs@...atatu.com>,
        "jiri@...nulli.us" <jiri@...nulli.us>,
        "kurt@...utronix.de" <kurt@...utronix.de>,
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        "paulb@...dia.com" <paulb@...dia.com>,
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        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "michal.swiatkowski@...ux.intel.com" 
        <michal.swiatkowski@...ux.intel.com>,
        "Lobakin, Alexandr" <alexandr.lobakin@...el.com>,
        "mostrows@...thlink.net" <mostrows@...thlink.net>,
        "paulus@...ba.org" <paulus@...ba.org>
Subject: Re: [RFC PATCH net-next v4 1/4] flow_dissector: Add PPPoE dissectors

On Wed, Jul 13, 2022 at 01:54:35PM +0000, Drewek, Wojciech wrote:
> I think this should work with both LE and BE arch, what do you think Guillaume?
> We don't want to spam so much with next versions so maybe it is better
> to ask earlier.
> 
> 	u16 ppp_proto;
> 
> 	ppp_proto = ntohs(hdr->proto);
> 	if (ppp_proto & 256) {
> 		ppp_proto = htons(ppp_proto >> 8);
> 		nhoff += PPPOE_SES_HLEN - 1;
> 	} else {
> 		ppp_proto = htons(ppp_proto);
> 		nhoff += PPPOE_SES_HLEN;
> 	}

Sorry for responding late. I was away this week (and will be next week
too) and have very sporadic (and slow) Internet connection and limitted
time for review. I saw you've sent a v5 with this code, I'll reply
there. Thanks for being so patient.