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Date:      Wed, 10 Jul 2002 06:25:19 -0400
From:      Dan Pelleg <>
To:        Luigi Rizzo <>
Subject:   Re: ipfw2 patches for -stable available
Message-ID:  <15660.2959.142937.827544@gargle.gargle.HOWL>
In-Reply-To: <>
References:  <> <> <>

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Luigi Rizzo writes:
 > Hi Dan,
 > thanks for the report:
 > > I've only used it briefly. For now it looks ok, with the following observations:
 > > 
 > > 1) the "icmptype" option doesn't seem to be supported
 > the manpage lists "icmptypes" (plural) as the option keyword,
 > though it is true that the previous code allowed abbreviations
 > (but those could be ambiguous). I am not sure whether or
 > not it is the case to fix it -- for sure i can add "icmptype"
 > as an alias for "icmptypes"

I see. While both choices are reasonable, this change has the potential of
causing a lot of grief to people who find their rulesets altered. If we're
dropping abbreviations, maybe it's a good idea to provide a
search-and-replace script to convert existing rule scripts. Maybe even
offer it as part of mergemaster (if that's at all possible - I don't know).

 > > 3) I'm getting lots of "/kernel: install_state: entry already present,
 > > done"  (related to (2)?).
 > this one i cannot reproduce, do you have a small ruleset and
 > input example to send me so i can try and reproduce the problem ?

That's easy:

sh /etc/rc.firewall closed

ipfw add 500 pass tcp from me to any keep-state limit src-addr dst-port 40
ipfw add 600 pass udp from me to any keep-state limit src-addr dst-port 40

 Now just fire up Mozilla (which opens lots of connections in rapid
succession) and watch the logs.

I have another bug to report. The following causes a segfault on a
DUMMYNET-less machine:

ipfw queue 1 config pipe 10 weight 100 mask src-ip 0xffffffff

note that if you drop the mask speficier, then it just tells you:

ipfw: setsockopt(IP_DUMMYNET_CONFIGURE): Protocol not available

as it should.

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