Date: Sun, 17 Mar 1996 10:31:27 +0100 (MET) From: J Wunsch <j@uriah.heep.sax.de> To: freebsd-hackers@freebsd.org (FreeBSD hackers) Cc: frankd@yoda.fdt.net, Kai.Vorma@hut.fi Subject: Re: Linux PPP upgrade causes problems Message-ID: <199603170931.KAA10600@uriah.heep.sax.de> In-Reply-To: <199603170709.JAA19448@lesti.hut.fi> from "Kai Vorma" at Mar 17, 96 09:09:07 am
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As Kai Vorma wrote:
>
>
> My Linux using ISP just upgraded his PPP version to 2.2.0e and I can no
> longer access the net from his system. I am using user level PPP from
> -stable of about a month and a half ago (early Feb) and have had no problems
>
> Sounds familiar. Try adding to /etc/ppp/ppp.conf
>
> disable pred1
> deny pred1
IIJPPP's CCP handling is horribly broken. It continues to use pred1
compression even after the CCP negotiation yielded with no commonly
agreed compression protocol.
*However*, if your Linux side is using pppd, they should consider also
applying the patch that i've recently introduced in FreeBSD-current.
There's no use in keeping the CCP layer up after no common compression
protocol could be found, so closing this layer down is the best that
can be done. This way, IIJPPP does also stop using pred1 compression.
It simply makes your ISP being better safe than sorry.
The patch is very small, so i'm posting it here again (rcsid diff
omitted):
Index: /usr/src/usr.sbin/pppd/ccp.c
===================================================================
RCS file: /home/cvs/src/usr.sbin/pppd/ccp.c,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -u -r1.3 -r1.4
--- ccp.c 1995/10/31 21:29:19 1.3
+++ ccp.c 1996/03/08 01:21:53 1.4
@@ -497,6 +497,10 @@
syslog(LOG_NOTICE, "%s enabled",
go->bsd_compress? ho->bsd_compress? "Compression":
"Receive compression": "Transmit compression");
+ if (!ANY_COMPRESS(ccp_gotoptions[f->unit])) {
+ syslog(LOG_NOTICE, "No matching compression scheme, CCP disabled");
+ ccp_close(f->unit);
+ }
}
/*
--
cheers, J"org
joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)
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