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Subject: RE: [PATCH v5] lib/net: fix tcp/udp cksum with padding data
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Date: Thu, 14 Dec 2023 12:20:18 +0100
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Thread-Topic: [PATCH v5] lib/net: fix tcp/udp cksum with padding data
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References: <20231213043732.2113867-1-kaiwenx.deng@intel.com>
 <20231214092259.2126634-1-kaiwenx.deng@intel.com>
From: =?iso-8859-1?Q?Morten_Br=F8rup?= <mb@smartsharesystems.com>
To: "Kaiwen Deng" <kaiwenx.deng@intel.com>,
	<dev@dpdk.org>
Cc: <stable@dpdk.org>, <qiming.yang@intel.com>, <yidingx.zhou@intel.com>,
 "Aman Singh" <aman.deep.singh@intel.com>,
 "Ferruh Yigit" <ferruh.yigit@intel.com>,
 "Xiaoyun Li" <xiaoyun.li@intel.com>
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> From: Kaiwen Deng [mailto:kaiwenx.deng@intel.com]
> Sent: Thursday, 14 December 2023 10.23
>=20
> IEEE 802 packets may have a minimum size limit. The data fields
> should be padded when necessary. In some cases, the padding data
> is not zero.
>=20
> In 'rte_ipv4_udptcp_cksum_mbuf()', as payload length
> "mbuf->pkt_len - l4_off" is used, which includes padding and if
> padding is not zero it will end up producing wrong checksum.
>=20
> This patch will use IP header to get the payload size to calculate
> tcp/udp checksum.
>=20
> Fixes: d178f693bbfe ("net: add UDP/TCP checksum in mbuf segments")
> Cc: stable@dpdk.org
>=20
> Signed-off-by: Kaiwen Deng <kaiwenx.deng@intel.com>
> ---

Reviewed-by: Morten Br=F8rup <mb@smartsharesystems.com>