[Cerowrt-devel] TFO crashes cerowrt 3.7.1-1

Dave Taht dave.taht at gmail.com
Fri Jan 4 12:04:02 EST 2013

On Thu, Jan 3, 2013 at 8:54 AM, Ketan Kulkarni <ketkulka at gmail.com> wrote:
> Thanks Dave.
> I upgraded my 3800 to 3.7.1-1. It is working for day to day Internet activity.
> However, I am not able to get through even a single TCP TFO
> connection. The router restarts as soon as it sees the TFO connection.
> Looks like SYN+Data is crashing the box (see attached trace captured
> on lo iface of cero). logread, dmesg did not show anything. I don't
> know whether its kernel panic.
> Any pointers to debug further?
> This is strange as 3.6 was working for SYN+Data cases.
> However the difference from previous instance is the polipo server
> with TFO running on cero box.
> Client may run on same cero or on my laptop which in either case
> crashes the box.
> On 3.7, if I run the TFO client on cero box and TFO server on the
> laptop, it still works but not the reverse.
> Any thoughts?

I suspect that the new TFO code hasn't been tested much on mips. Am
glad you are doing so!

I got my replacement wndr3800s a few days ago, and will put the next
build through the TFO wringer (as well as attach a serial console).
That said, perhaps your bug report best belongs on netdev where there
are a couple people working hard on TFO and at least one has a cerowrt
capable box...

Does TFO successfully pass through the router?

> Thanks,
> Ketan
> On Wed, Jan 2, 2013 at 3:33 PM, Dave Taht <dave.taht at gmail.com> wrote:
>> Two formerly back-ordered 3800s arrived yesterday!
>> They barely had time to power on before I reflashed them with:
>> http://snapon.lab.bufferbloat.net/~cero2/cerowrt/wndr/3.7.1-1/
>> I still regard this series as heavily development oriented and
>> unsuitable for general use. In particular I'd like to wait for dnsmasq
>> to come out of beta, fix AHCP, add a gui for the ceroshaper, etc, etc.
>> But: This is the first devel release I've been able to test in the
>> real world as a default gw in a while. So far, so good.
>> I have some issues with how the new network6 configuration stuff
>> interacts with ahcp, but aside from that... I saw upnp work for the
>> first time... saw the ula auto code work... analyzed some dropbox and
>> netflix traffic, ran a couple android boxes through it, fiddled with
>> nfq_codel...
>> some notes:
>> + resync with openwrt head
>> + update to Linux 3.7.1 with unaligned patches from robert bradley
>> + A QFQ+ update
>> + mildly improved nfq_codel
>> - Missing cups support (didn't compile
>> - no ipv6 npt yet
>> Merry New Year!
>> --
>> Dave Täht
>> Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.html
>> _______________________________________________
>> Cerowrt-devel mailing list
>> Cerowrt-devel at lists.bufferbloat.net
>> https://lists.bufferbloat.net/listinfo/cerowrt-devel

Dave Täht

Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.html

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