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Date: Mon, 4 Aug 1997 09:00:02 -0700 (PDT)
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From: Daniel Holmes <danielh@dakcs.com>
Subject: Re: bin/4209: ipfw does not work with multiple digit interface numbers
Reply-To: Daniel Holmes <danielh@dakcs.com>
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The following reply was made to PR bin/4209; it has been noted by GNATS.

From: Daniel Holmes <danielh@dakcs.com>
To: nate@mt.sri.com
Cc: FreeBSD-gnats-submit@freebsd.org
Subject: Re: bin/4209: ipfw does not work with multiple digit interface numbers
Date: Mon, 4 Aug 1997 15:58:51 GMT

    Hmm, this works in 2.1-stable:
 
    # /sbin/ipfw add 65000 deny log all from any to any via etha16
 
 Just tried it on 2.2-RELEASE, no go.  I'll check some sources and see
 what has changed. 
 
    What's the output of:
    # ifconfig etha16
 
 # ifconfig -a
 ed0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
         inet 207.108.157.97 netmask 0xfffffff0 broadcast 207.108.157.111
         ether 00:c0:26:38:ab:4a
 lp0: flags=8810<POINTOPOINT,SIMPLEX,MULTICAST> mtu 1500
 eth0: flags=41<UP,RUNNING> mtu 1500
         inet 192.168.1.3 netmask 0xffffffff
 lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
         inet 127.0.0.1 netmask 0xff000000
 etha16: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500
         inet 206.80.195.22 --> 206.80.195.21 netmask 0xfffffffc
 
 I did check the source to ipfw.c over the weekend, and it looks like
 when it sets up the unit name and number, it sets the last
 character from the string to a null but it looks like it gets
 everything after the first digit on the unit number.  At line 742 in ipfw.c:
 
 	rule.fw_via_name[sizeof(rule.fw_via_name) - 1] = '\0';
 
 changing that to
 
 	rule.fw_via_name[sizeof(rule.fw_via_name)] = '\0';      
 
 at least makes the rule show up correctly in the 'ipfw list' command,
 but I don't know if it actually does any good, or not.  I did notice
 that it doesn't accept 3 digit unit numbers, but that is a secondary
 concern at the moment.
 
 uname gives:
 FreeBSD ns1.recoverycoll.com 2.2.2-RELEASE FreeBSD 2.2.2-RELEASE #0: Wed Jul 2
 14:38:29 GMT 1997 danielh@hwroom.dakcs.com:/usr/src/sys/compile/FIREWALL i386
 
 Any ideas?  
 
 Thanks,
 Dan
 
 -- 
 Daniel D Holmes, N7NKR               "Mr. Worf, fire at will!"  <ZAP!>
 I'net:  DANIELH@DAKCS.COM            "Hey--where'd Riker go?"
 Standard disclaimers apply wherever you can find a sticky spot.