From: Robert Bradley <robert.bradley1@gmail.com>
To: cerowrt-devel@lists.bufferbloat.net
Subject: Re: [Cerowrt-devel] TFO crashes cerowrt 3.7.1-1
Date: Fri, 04 Jan 2013 22:25:34 +0000 [thread overview]
Message-ID: <50E756DE.6000406@gmail.com> (raw)
In-Reply-To: <CAMZR1YBs0w1r9T1S7A-Uin34tGMrY3y7oh0WqiZZ-SaXTeQMNA@mail.gmail.com>
On 04/01/13 20:42, Maciej Soltysiak wrote:
> This is very weird, because TFO is TCP and the DNS queries fired off by
> polipo are UDP:
> root@OpenWrt:/tmp/log# tcpdump -n -v -vv -vvv -x -X -s 1500 -i lo
<snip>
> This is the only DNS traffic I saw during the attempts. The tcpdumps have
> udp bad checksum but when I disabled TFO in polipo, the UDP where still bad
> checksum but they worked.
> Really weird.
I think this is a side effect of the loopback interface not processing
checksums by default. I will be more worried if the checksum errors
also occur on ge00, but am not ruling out problems with the unaligned
access patches yet.
As an aside, I've noticed very occasional issues connecting to
(IPv4-only) sites using both Sugarland and the 3.6.10 release, which
gets fixed when the connection is retried. I have been unable to repeat
this on demand, however.
--
Robert Bradley
next prev parent reply other threads:[~2013-01-04 22:25 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-04 17:04 Dave Taht
2013-01-04 17:27 ` Eric Dumazet
2013-01-04 17:33 ` Dave Taht
2013-01-04 20:42 ` Maciej Soltysiak
2013-01-04 20:43 ` Maciej Soltysiak
2013-01-04 20:57 ` Jerry Chu
2013-01-04 21:21 ` Dave Taht
2013-01-04 21:36 ` Jerry Chu
2013-01-04 21:44 ` Dave Taht
2013-01-04 21:01 ` dpreed
2013-01-04 22:49 ` Robert Bradley
2013-01-04 21:11 ` Dave Taht
2013-01-04 21:19 ` Jerry Chu
2013-01-05 1:59 ` Ketan Kulkarni
2013-01-05 2:20 ` Yuchung Cheng
2013-01-05 3:02 ` Ketan Kulkarni
2013-01-05 3:16 ` Eric Dumazet
2013-01-05 3:35 ` Dave Taht
2013-01-05 4:05 ` Dave Taht
2013-01-05 19:13 ` Ketan Kulkarni
2013-01-13 17:01 ` Ketan Kulkarni
2013-01-13 18:03 ` Eric Dumazet
2013-01-13 21:39 ` Felix Fietkau
2013-01-14 0:38 ` Yuchung Cheng
2013-01-14 3:05 ` Eric Dumazet
2013-01-14 4:07 ` Eric Dumazet
2013-01-14 4:43 ` Ketan Kulkarni
2013-01-14 6:14 ` Dave Taht
2013-01-14 19:50 ` Dave Taht
2013-01-14 8:18 ` Jerry Chu
2013-01-14 16:32 ` Eric Dumazet
2013-01-04 22:25 ` Robert Bradley [this message]
2013-01-14 6:11 ` Dave Taht
2013-01-14 16:37 ` Ketan Kulkarni
2013-01-16 22:19 ` Maciej Soltysiak
2013-01-17 0:58 ` Dave Taht
2013-01-17 3:44 ` Dave Taht
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