On Fri, Aug 13, 2010 at 5:25 PM, Steve Chen [off-list ref] wrote:

On Fri, Aug 13, 2010 at 12:55 PM, Brian Haley [off-list ref] wrote:

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On 08/13/2010 01:34 PM, Steve Chen wrote:

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The TAHI correspondent node tests CN-6-4-1 (Processing in upper layer
- Echo Checksum) failed for me in the 2.6.32 kernel.  It appears that
the Linux kernel is replying the ICMP echo request in
icmpv6_echo_reply without much checking.  Is this an intentional
non-conformance to RFC3775 section 9.3.1?

[snip]

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It appears that skb->ip_summed is always 1 (CHECKSUM_UNNECESSARY).
I'm using e1000e.  Looking at the driver, there is a checksum offload
hardware.  I think the code is doing frame check on the entire
Ethernet packet.  Since no error was found, it assume everything
inside is correct.

# ethtool -K ethX rx off

Does that help?  Does using a different NIC help?

ethtool did not help.

I tried to run the test with a different NIC, but I keep getting

...

IPSEC_AKEY      :               --------------------
IPSEC_EALGO     :               ---------
IPSEC_EKEY      :               ------------------------
IPSEC_SUPPORT   :               OFF
RR_TIMEOUT      :               3
TIMEOUT :               2
WAIT_RATELIMIT  :               1
send Ra_R0_AllNd
Wait 3 sec.
Clear Captured Packets (Link0)
Clear Captured Packets (Link0)
send Ns_R0_AllNd
######### Packe Name(RH) Field Value(NextHeader) is NULL
CNT_SendAndRecv Status=UnKnown
NG UnKnown
 -> Initialization Fail
...

Brian,

Oops, set the Link0 in nut.def to the wrong value.  However, I'm still
getting the same failure with different NIC.  I'll start looking into
the code.  Please let me know your test results.

Thanks,

Steve