Date: Fri, 18 Jul 1997 13:57:41 +0900 (JST) From: itojun@itojun.org To: bugs@freebsd.org Cc: ishii@csl.sony.co.jp, rt-bone@wide.ad.jp Subject: net/if_spppsubr.c: can't talk with cisco via HDLC Message-ID: <199707180457.NAA17764@itojun.csl.sony.co.jp>
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>Submitter-Id: itojun
>Originator: Jun-ichiro ITOH
>Organization:
itojun.org
>Confidential: no
>Synopsis: net/if_spppsubr.c broken (can't talk with cisco via HDLC)
>Severity: serious
>Priority: high
>Category: net
>Class: sw-bug
>Release: FreeBSD-current
>Environment:
latest source on cvs repository has this bug too.
>Description:
FreeBSD box + riscomN2pci can't talk to cisco by using CISCO HDLC
IP encapsulation.
credit goes to ishii@csl.sony.co.jp (Kimio Ishii).
>How-To-Repeat:
try to talk with cisco, by CISCO HDLC.
>Fix:
apply this patch. (it is based on slightly modified source, but
it should be trivial)
if there's no objection, I can commit it myself.
--- if_spppsubr.c-dist Fri Jul 18 13:29:11 1997
+++ if_spppsubr.c Fri Jul 18 13:32:37 1997
@@ -920,7 +920,7 @@
struct ifaddr *ifa;
struct ifnet *ifp = &sp->pp_if;
- if (m->m_pkthdr.len != CISCO_PACKET_LEN) {
+ if (m->m_pkthdr.len < CISCO_PACKET_LEN) {
if (ifp->if_flags & IFF_DEBUG)
printf ("%s%d: invalid cisco packet length: %d bytes\n",
ifp->if_name, ifp->if_unit, m->m_pkthdr.len);
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