On Tue, 28 Aug 2007, blue wrote:
Hi,
Since our device adopts the IPsec codes from BSD, our device will have
infinite loop after receiving ICMP packet too big message.
I am not sure whether BSD itself will have the problem or not (maybe needs
further testing). In IPSEC, esp6_ctlinput() still calls pfctlinput2(), which
is the root cause of the infinite loop.
you were talking about IPSEC vs. FAST_IPSEC so I guess you are on
RELENG_6 or is that HEAD. Would be helpful to know where exactly
(though I guess looking at the code I could find out).
Is it the problem reported here[1] that you are describing?
/bz
[1] http://lists.freebsd.org/pipermail/freebsd-current/2007-August/076478.html
Best regards,
Yi-Wen
JINMEI Tatuya / ???? wrote:
At Tue, 28 Aug 2007 10:15:31 +0800,
blue <[EMAIL PROTECTED]> wrote:
When receiving a "packet too big" ICMP error message, FreeBSD will call
the ctlinput() function of the upper protocol. If the preceding packet is
an ESP IPv6 packet, then FreeBSD will call esp6_ctlinput(). In
esp6_ctlinput(), pfctlinput2() will be executed to traverse all possible
upper protocols, and call their registered ctlinput() function. However,
that would call esp6_ctlinput() again since ESP is one of the upper
protocols! Then an infinite loop occurs!!
From a quick look at the code, there's a slight difference between the
IPSEC (netinet6/esp_input.c) and FAST_IPSEC (netipsec/ipsec_input.c)
implementations. I suspect the loop doesn't occur at least for the
esp_input.c version. Did you actually see the loop for both, or are
you guessing from the code?
After comparing both IPSEC and FAST_IPSEC, the operations are exactly the
same. Is it a bug?
If it actually causes an infinite loop, it's a bug, of course.
JINMEI, Tatuya
Communication Platform Lab.
Corporate R&D Center, Toshiba Corp.
[EMAIL PROTECTED]
_______________________________________________
freebsd-net@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-net
To unsubscribe, send any mail to "[EMAIL PROTECTED]"
--
Bjoern A. Zeeb bzeeb at Zabbadoz dot NeT
Software is harder than hardware so better get it right the first time.
_______________________________________________
freebsd-net@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-net
To unsubscribe, send any mail to "[EMAIL PROTECTED]"
