From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Subject: Re: [PATCH 3/4] ethdev: add Rx offload outer L4 checksum
 definitions
Date: Sun, 16 Sep 2018 15:02:25 +0530
Message-ID: <20180916093200.GA1849@jerin>
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Cc: Wenzhuo Lu <wenzhuo.lu@intel.com>, Jingjing Wu <jingjing.wu@intel.com>,
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To: Shahaf Shuler <shahafs@mellanox.com>
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-----Original Message-----
> Date: Sun, 16 Sep 2018 05:53:30 +0000
> From: Shahaf Shuler <shahafs@mellanox.com>
> To: Jerin Jacob <jerin.jacob@caviumnetworks.com>
> CC: Wenzhuo Lu <wenzhuo.lu@intel.com>, Jingjing Wu <jingjing.wu@intel.com>,
>  Bernard Iremonger <bernard.iremonger@intel.com>, John McNamara
>  <john.mcnamara@intel.com>, Marko Kovacevic <marko.kovacevic@intel.com>,
>  Thomas Monjalon <thomas@monjalon.net>, Ferruh Yigit
>  <ferruh.yigit@intel.com>, Andrew Rybchenko <arybchenko@solarflare.com>,
>  Olivier Matz <olivier.matz@6wind.com>, "dev@dpdk.org" <dev@dpdk.org>
> Subject: RE: [dpdk-dev] [PATCH 3/4] ethdev: add Rx offload outer L4
>  checksum definitions
> 
> Friday, September 14, 2018 6:06 AM, Jerin Jacob:
> > Subject: Re: [dpdk-dev] [PATCH 3/4] ethdev: add Rx offload outer L4
> > checksum definitions
> >
> > -----Original Message-----
> > > Date: Thu, 13 Sep 2018 17:24:26 +0000
> > > From: Shahaf Shuler <shahafs@mellanox.com>
> > > To: Jerin Jacob <jerin.jacob@caviumnetworks.com>, Wenzhuo Lu
> > > <wenzhuo.lu@intel.com>, Jingjing Wu <jingjing.wu@intel.com>, Bernard
> > > Iremonger <bernard.iremonger@intel.com>, John McNamara
> > > <john.mcnamara@intel.com>, Marko Kovacevic
> > > <marko.kovacevic@intel.com>,  Thomas Monjalon
> > <thomas@monjalon.net>,
> > > Ferruh Yigit  <ferruh.yigit@intel.com>, Andrew Rybchenko
> > > <arybchenko@solarflare.com>,  Olivier Matz <olivier.matz@6wind.com>
> > > CC: "dev@dpdk.org" <dev@dpdk.org>
> > > Subject: RE: [dpdk-dev] [PATCH 3/4] ethdev: add Rx offload outer L4
> > > checksum definitions
> > >
> > >
> > > Thursday, September 13, 2018 4:47 PM, Jerin Jacob:
> > > > Subject: [dpdk-dev] [PATCH 3/4] ethdev: add Rx offload outer L4
> > > > checksum definitions
> > > >
> > > > Introduced DEV_RX_OFFLOAD_OUTER_UDP_CKSUM,
> > > > DEV_RX_OFFLOAD_OUTER_TCP_CKSUM and
> > DEV_RX_OFFLOAD_OUTER_SCTP_CKSUM
> > > > offload flags and
> > >
> > > Out of curiosity, which TCP based tunnels you target with this current
> > patchset?
> >
> > I am not aware of any _popular_/_non proprietary_  protocols except SSTP
> > for VPN.
> 
> And your device can support such protocol inner and outer checksum check?

Yes for TCP/UDP/SCTP.

> From what I see the inner packet of SSTP is encrypted by SSL.
> 
> So for outer and inner checksum validation device will need to:
> 1. compute the outer TCP checksum
> 2. if valid decrypt the inner PPP packet
> 3. compute the PPP checksum.