Re: [Cerowrt-devel] cerowrt 3.7.1-1 released

[Ketan Kulkarni <ketkulka@gmail.com>]

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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?

Thanks,
Ketan

On Wed, Jan 2, 2013 at 3:33 PM, Dave Taht <dave.taht@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@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/cerowrt-devel

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root@OpenWrt:~# httping -F -g http://127.0.0.1:8123
PING 127.0.0.1:8123 (http://127.0.0.1:8123):
16:36:36.033466 IP localhost.39443 > localhost.8123: Flags [SEW], seq 2946288341, win 43690, options [mss 65495,sackOK,TS val 4294964893 ecr 0,nop,wscale 6,Unknown Option 254f989], length 0 --> SYN + Coockie and no Data.
connected to 127.0.0.1:8123 (183 bytes), seq=0 time=3.15 ms 
16:36:36.033584 IP localhost.8123 > localhost.39443: Flags [S.E], seq 654941876, ack 2946288342, win 43690, options [mss 65495,sackOK,TS val 4294964893 ecr 4294964893,nop,wscale 6,Unknown Option 254f989df087214939732ef], length 0  --> SYN+ACK+Cookie
16:36:36.033638 IP localhost.39443 > localhost.8123: Flags [.], ack 1, win 683, options [nop,nop,TS val 4294964893 ecr 4294964893], length 0
16:36:36.034971 IP localhost.39443 > localhost.8123: Flags [P.], seq 1:65, ack 1, win 683, options [nop,nop,TS val 4294964894 ecr 4294964893], length 64 --> HTTP Request HEAD
16:36:36.035112 IP localhost.8123 > localhost.39443: Flags [.], ack 65, win 683, options [nop,nop,TS val 4294964894 ecr 4294964894], length 0
16:36:36.035808 IP localhost.8123 > localhost.39443: Flags [P.], seq 1:184, ack 65, win 683, options [nop,nop,TS val 4294964894 ecr 4294964894], length 183  --> HTTP Response
16:36:36.035965 IP localhost.8123 > localhost.39443: Flags [F.], seq 184, ack 65, win 683, options [nop,nop,TS val 4294964894 ecr 4294964894], length 0
16:36:36.036082 IP localhost.39443 > localhost.8123: Flags [.], ack 184, win 700, options [nop,nop,TS val 4294964894 ecr 4294964894], length 0
16:36:36.036350 IP localhost.39443 > localhost.8123: Flags [F.], seq 65, ack 185, win 700, options [nop,nop,TS val 4294964894 ecr 4294964894], length 0
16:36:36.036462 IP localhost.8123 > localhost.39443: Flags [.], ack 66, win 683, options [nop,nop,TS val 4294964894 ecr 4294964894], length 0  --> Connection Completes

### No packets seen later - Probably SYN+Data Crashed the box ###