netdev - RE: [RFC PATCH net-next v2 1/4] flow_dissector: Add PPPoE dissectors

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Date:   Wed, 29 Jun 2022 07:44:50 +0000
From:   "Drewek, Wojciech" <wojciech.drewek@...el.com>
To:     Jakub Kicinski <kuba@...nel.org>,
        Marcin Szycik <marcin.szycik@...ux.intel.com>
CC:     "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>,
        "jhs@...atatu.com" <jhs@...atatu.com>,
        "jiri@...nulli.us" <jiri@...nulli.us>,
        "kurt@...utronix.de" <kurt@...utronix.de>,
        "pablo@...filter.org" <pablo@...filter.org>,
        "pabeni@...hat.com" <pabeni@...hat.com>,
        "paulb@...dia.com" <paulb@...dia.com>,
        "simon.horman@...igine.com" <simon.horman@...igine.com>,
        "komachi.yoshiki@...il.com" <komachi.yoshiki@...il.com>,
        "zhangkaiheb@....com" <zhangkaiheb@....com>,
        "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>
Subject: RE: [RFC PATCH net-next v2 1/4] flow_dissector: Add PPPoE dissectors



> -----Original Message-----
> From: Jakub Kicinski <kuba@...nel.org>
> Sent: środa, 29 czerwca 2022 06:40
> To: Marcin Szycik <marcin.szycik@...ux.intel.com>
> Cc: netdev@...r.kernel.org; Nguyen, Anthony L <anthony.l.nguyen@...el.com>; davem@...emloft.net;
> xiyou.wangcong@...il.com; Brandeburg, Jesse <jesse.brandeburg@...el.com>; gustavoars@...nel.org;
> baowen.zheng@...igine.com; boris.sukholitko@...adcom.com; edumazet@...gle.com; jhs@...atatu.com; jiri@...nulli.us;
> kurt@...utronix.de; pablo@...filter.org; pabeni@...hat.com; paulb@...dia.com; simon.horman@...igine.com;
> komachi.yoshiki@...il.com; zhangkaiheb@....com; intel-wired-lan@...ts.osuosl.org; michal.swiatkowski@...ux.intel.com; Drewek,
> Wojciech <wojciech.drewek@...el.com>; Lobakin, Alexandr <alexandr.lobakin@...el.com>
> Subject: Re: [RFC PATCH net-next v2 1/4] flow_dissector: Add PPPoE dissectors
> 
> On Tue, 28 Jun 2022 13:29:15 +0200 Marcin Szycik wrote:
> > +static bool is_ppp_proto_supported(__be16 proto)
> 
> What does supported mean in this context?

It means that only those protocols are going to be dissected.

> 
> > +{
> > +	switch (ntohs(proto)) {
> > +	case PPP_AT:
> 
> Byte swap on the constant.

Sure, it will be included in v3

> 
> > +	case PPP_IPX:
> > +	case PPP_VJC_COMP:
> > +	case PPP_VJC_UNCOMP:
> > +	case PPP_MP:
> > +	case PPP_COMPFRAG:
> > +	case PPP_COMP:
> > +	case PPP_MPLS_UC:
> > +	case PPP_MPLS_MC:
> > +	case PPP_IPCP:
> > +	case PPP_ATCP:
> > +	case PPP_IPXCP:
> > +	case PPP_IPV6CP:
> > +	case PPP_CCPFRAG:
> > +	case PPP_MPLSCP:
> > +	case PPP_LCP:
> > +	case PPP_PAP:
> > +	case PPP_LQR:
> > +	case PPP_CHAP:
> > +	case PPP_CBCP:
> > +		return true;
> > +	default:
> > +		return false;
> > +	}
> > +}