From owner-freebsd-current  Mon Feb 28  6:19:11 2000
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Date: Mon, 28 Feb 2000 09:18:44 -0500
From: Jim Bloom <bloom@acm.org>
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To: Kai =?iso-8859-1?Q?Gro=DFjohann?= <Kai.Grossjohann@CS.Uni-Dortmund.DE>
Cc: freebsd-current@FreeBSD.ORG, freebsd-ipfw@FreeBSD.ORG
Subject: Re: cpp change breaks ipfw
References: <38B8BAC5.9927A56E@acm.org> <vafem9x1sw3.fsf@lucy.cs.uni-dortmund.de> <38BA6E6D.239DEDB1@acm.org> <vafsnyd4evy.fsf@lucy.cs.uni-dortmund.de>
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Kai Gro=DFjohann wrote:
> =

> /----
> | $ cat foo
> | #define rule(ADDR,MASK) add pass tcp from ADDR ## : ## MASK to any 25=
 setup
> | rule(192.168.2.5,255.255.254.0)
> | $ type cpp
> | cpp is hashed (/usr/bin/cpp)
> | $ cpp foo
> | # 1 "foo"
> |
> | add pass tcp from  192.168.2.5:255.255.254.0  to any 25 setup
> | $ cpp --version
> | 2.95.2
> \----
> =

> Note that there is no space in ``192.168.2.5:255.255.254.0''.  I
> thought that this is what you wanted?  If this isn't what you wanted,
> I'm sorry for the misunderstanding.

That small test works fine, but doesn't solve the problem I was having.  =
Try
this small test case to see my problem:

#define addr 192.186.2.5
#define mask 255.255.240.0

#define rule(ADDR,MASK) add pass tcp from ADDR ## : ## MASK to any 25 set=
up
rule(addr,mask)

This also does not work if addr and mask are defined on the command line.=
  The
problem arises from using another defined value as the string being
concatenated.  The concatenation works for constants though.

Jim Bloom
bloom@acm.org


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