* Re: H.225.0 "Connect" packet dropped (fwd)
@ 2011-02-14 15:18 Jozsef Kadlecsik
2011-02-15 10:12 ` Patrick McHardy
0 siblings, 1 reply; 2+ messages in thread
From: Jozsef Kadlecsik @ 2011-02-14 15:18 UTC (permalink / raw)
To: netfilter-devel; +Cc: jobhunts02
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[Forwarded to netfilter-devel as it is the proper mailing list for the
issue.]
---------- Forwarded message ----------
Date: Fri, 11 Feb 2011 21:53:27 -0500
From: jobhunts02@aol.com
To: kadlec@blackhole.kfki.hu
Cc: netfilter@vger.kernel.org
Subject: Re: H.225.0 "Connect" packet dropped
Here is my network topology:
+-----------+
| camera |
|10.175.1.6 |
+-----------+
|
|
+--------------+ | +----------------------+ +----------------------+ +--------------+
| PC1 | | | Linux Box1 | | Linux Box2 | | PC2 |
| 10.175.1.3 |<--->|10.175.1.1 10.0.1.220|~~~ Satellite ~~~|10.0.1.219 10.175.2.1|<---->| 10.175.2.2 |
| | |eth0 sat0| Link |sat0 eth0| | |
+--------------+ +----------------------+ +----------------------+ +--------------+
I am trying to send video from the camera to PC2. The attached pcap files were from Linux Box2, which is where the
Connect message from PC2 to the camera gets dropped. As you can see in eth0.pcap, the Connect message from PC2 to
the camera is there, but it is not in sat0.pcap. Since no Connect message gets to the camera, the video stream never starts.
While doing the capture, I also got numerous "Invalid truesize" warnings. If I do not do a capture, I do not see these warnings. If I disable SCPS, I do not see these warnings either, whether or not I am doing a capture.
Feb 11 21:44:54 (none) user.info kernel: device eth0 entered promiscuous mode
Feb 11 21:45:05 (none) user.info kernel: device sat0 entered promiscuous mode
Feb 11 21:45:52 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=78, sizeof(sk_buff)=176
Feb 11 21:45:52 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=74, sizeof(sk_buff)=176
Feb 11 21:45:52 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:45:52 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:45:53 (none) user.err kernel: SKB BUG: Invalid truesize (400) len=236, sizeof(sk_buff)=176
Feb 11 21:45:53 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:45:53 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:45:53 (none) user.err kernel: SKB BUG: Invalid truesize (336) len=169, sizeof(sk_buff)=176
Feb 11 21:45:53 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:45:54 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:45:59 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:00 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:01 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:03 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:09 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:19 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:39 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:54 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:54 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:54 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:54 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:54 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:55 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:55 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:55 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:55 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:55 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:55 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:56 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:56 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:56 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:56 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:56 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:56 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:56 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:56 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:57 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:57 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:57 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:57 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:57 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:57 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:58 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:58 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:58 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:58 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:58 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:59 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:59 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:59 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:46:59 (none) user.warn kernel: __ratelimit: 12 messages suppressed
Feb 11 21:46:59 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:46:59 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:00 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:00 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:00 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:00 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:00 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:01 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:01 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:01 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:01 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:01 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:02 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:02 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:02 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:02 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:02 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:03 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:03 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:03 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:03 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:04 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:04 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:04 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:04 (none) user.warn kernel: __ratelimit: 22 messages suppressed
Feb 11 21:47:04 (none) user.warn kernel: nf_ct_q931: packet dropped
Feb 11 21:47:04 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:04 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:05 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=66, sizeof(sk_buff)=176
Feb 11 21:47:05 (none) user.err gateway: Gateway: Connection being reset 20 0 307
Feb 11 21:47:05 (none) user.err gateway: Gateway: Connection being reset 20 0 307
Feb 11 21:47:05 (none) user.err gateway: Gateway: Connection being reset 20 0 307
-----Original Message-----
From: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
To: jobhunts02@aol.com
Cc: netfilter@vger.kernel.org
Sent: Fri, Feb 11, 2011 12:20 am
Subject: Re: H.225.0 "Connect" packet dropped
On Thu, 10 Feb 2011, jobhunts02@aol.com wrote:
> When I have connection tracking enabled in the kernel and use the Space
> Communications Protocol Standard (SCPS), which is a protocol to speed up TCP
> over satellite, I can no longer start a video call using Polycom
> ViewStationFX. Using Wireshark, I see the "Connect" packet is being dropped.
> At the same time, I see "nf_ct_q931: packet dropped" being printed to
> /var/log/messages. I have verified that the packet being dropped is the
> "Connect" packet. Other packets before that are not getting dropped, e.g.,
> the "Alert" packet. This happens because nf_ct_expect_related returns -EBUSY
> since expect_clash does not return zero. Without SCPS, the call works fine
> with connection tracking enabled.
>
> Why does expect_clash return nonzero? What is the "clash" it is looking for
> and is there any reason that SCPS would cause such a clash? Is there any
> known incompatibility between SCPS and connection tracking?
Record the full traffic with "tcpdump -s 0" and post the pcap file.
Even if you post your question fourth time, the answer will still be the
same.
Best regards,
Jozsef
-
E-mail : kadlec@blackhole.kfki.hu, kadlec@mail.kfki.hu
PGP key : http://www.kfki.hu/~kadlec/pgp_public_key.txt
Address : KFKI Research Institute for Particle and Nuclear Physics
H-1525 Budapest 114, POB. 49, Hungary
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: H.225.0 "Connect" packet dropped (fwd)
2011-02-14 15:18 H.225.0 "Connect" packet dropped (fwd) Jozsef Kadlecsik
@ 2011-02-15 10:12 ` Patrick McHardy
0 siblings, 0 replies; 2+ messages in thread
From: Patrick McHardy @ 2011-02-15 10:12 UTC (permalink / raw)
To: Jozsef Kadlecsik; +Cc: netfilter-devel, jobhunts02
On 14.02.2011 16:18, Jozsef Kadlecsik wrote:
> Here is my network topology:
>
> +-----------+
> | camera |
> |10.175.1.6 |
> +-----------+
> |
> |
> +--------------+ | +----------------------+ +----------------------+ +--------------+
> | PC1 | | | Linux Box1 | | Linux Box2 | | PC2 |
> | 10.175.1.3 |<--->|10.175.1.1 10.0.1.220|~~~ Satellite ~~~|10.0.1.219 10.175.2.1|<---->| 10.175.2.2 |
> | | |eth0 sat0| Link |sat0 eth0| | |
> +--------------+ +----------------------+ +----------------------+ +--------------+
>
>
> I am trying to send video from the camera to PC2. The attached pcap files were from Linux Box2, which is where the
> Connect message from PC2 to the camera gets dropped. As you can see in eth0.pcap, the Connect message from PC2 to
> the camera is there, but it is not in sat0.pcap. Since no Connect message gets to the camera, the video stream never starts.
>
>
> While doing the capture, I also got numerous "Invalid truesize" warnings. If I do not do a capture, I do not see these warnings. If I disable SCPS, I do not see these warnings either, whether or not I am doing a capture.
>
>
>
> Feb 11 21:44:54 (none) user.info kernel: device eth0 entered promiscuous mode
> Feb 11 21:45:05 (none) user.info kernel: device sat0 entered promiscuous mode
> Feb 11 21:45:52 (none) user.err kernel: SKB BUG: Invalid truesize (240) len=78, sizeof(sk_buff)=176
Something is obviously broken. Is SCPS implemented as a kernel
module?
^ permalink raw reply [flat|nested] 2+ messages in thread
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2011-02-14 15:18 H.225.0 "Connect" packet dropped (fwd) Jozsef Kadlecsik
2011-02-15 10:12 ` Patrick McHardy
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