Date: Tue, 23 Apr 1996 15:17:57 -0500 From: Jim Fleming <JimFleming@unety.net> To: "current@FreeBSD.org" <current@FreeBSD.org>, "'Poul-Henning Kamp'" <phk@critter.tfs.com> Cc: Jim Fleming <JimFleming@unety.net> Subject: RE: SLIP: Check IP Version (please test) Message-ID: <01BB3128.0E4B7660@webster.unety.net>
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On Tuesday, April 23, 1996 3:05 PM, Poul-Henning Kamp[SMTP:phk@critter.tfs.com] wrote: @ @Somebody running slip with header compression please test this patch. @ @Poul-Henning @ @> I am starting to develop a substantialliy modified version of the IP protocol @. @> As specified in the IP protocol the ip_v (IP Version) field of the IP header @> should be set to 4. (see /usr/src/sys/netinet/ip.h) @> @> It is not desirable for new versions of IP to "break" existing code. I have n @ot @> provide this but in studying the SLIP code I see that there is never really @> a check done to see of the IP header is of version 4. @ @Index: if_sl.c @=================================================================== @RCS file: /home/ncvs/src/sys/net/if_sl.c,v @retrieving revision 1.37 @diff -u -r1.37 if_sl.c @--- if_sl.c 1996/04/07 17:39:09 1.37 @+++ if_sl.c 1996/04/23 20:03:53 @@@ -561,7 +561,8 @@ @ } while (m1 = m1->m_next); @ } @ #endif @- if ((ip = mtod(m, struct ip *))->ip_p == IPPROTO_TCP) { @+ if ((ip = mtod(m, struct ip *))->ip_v == IPVERSION) && @+ (ip = mtod(m, struct ip *))->ip_p == IPPROTO_TCP) { @ if (sc->sc_if.if_flags & SC_COMPRESS) @ *mtod(m, u_char *) |= sl_compress_tcp(m, ip, @ &sc->sc_comp, 1); @-- @Poul-Henning Kamp | phk@FreeBSD.ORG FreeBSD Core-team. @http://www.freebsd.org/~phk | phk@login.dknet.dk Private mailbox. @whois: [PHK] | phk@ref.tfs.com TRW Financial Systems, Inc. @Future will arrive by its own means, progress not so. @ @ It looks good here....now SLIP will not compress our IPv8 IP headers...:-) -- Jim Fleming UNETY Systems, Inc. Naperville, IL 60563 e-mail: JimFleming@unety.net
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