From: Paolo Abeni <pabeni@redhat.com>
To: Mat Martineau <mathew.j.martineau@linux.intel.com>,
Matthieu Baerts <matthieu.baerts@tessares.net>,
Geliang Tang <geliangtang@gmail.com>
Cc: mptcp@lists.linux.dev
Subject: Re: MPTCP checksum interop
Date: Mon, 14 Jun 2021 10:30:42 +0200 [thread overview]
Message-ID: <8cceb711ad974911da62d62a354e6569b573e0b2.camel@redhat.com> (raw)
In-Reply-To: <aedffae2-61ad-eb44-c083-e674f736fd96@linux.intel.com>
Hello
On Fri, 2021-06-11 at 20:57 -0700, Mat Martineau wrote:
> I did some tests with connections with checksums enabled, between the
> export branch and the multipath-tcp.org mptcp_trunk branch (v1 mode).
Thank you for checking!
> When the multipath-tcp.org kernel was listening, the connection would
> always fall back to TCP when the first data was sent by the upstream
> kernel. The multipath-tcp.org kernel was the first to fall back and stop
> sending MPTCP headers.
This sounds like a csum error detected ??! What does wireshark say
about the MPTCP csum value?
> When the upstream kernel was listening, the multipath-tcp.org kernel would
> send corrupt TCP options with the first data packet (the first time a DSS
> option was sent). The upstream kernel would then send TCP RST.
How does TCP option look like? Could you please share a short pcap
snippet?
Thanks!
Paolo
next prev parent reply other threads:[~2021-06-14 8:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-12 3:57 MPTCP checksum interop Mat Martineau
2021-06-14 8:30 ` Paolo Abeni [this message]
2021-06-15 0:14 ` Mat Martineau
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