Date: Wed, 12 Mar 2008 23:28:46 -0500 (CDT) From: Mike Silbersack <silby@silby.com> To: "d.s. al coda" <coda.trigger@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: TCP options order changed in FreeBSD 7, incompatible with some routers Message-ID: <20080312232607.J60219@odysseus.silby.com> In-Reply-To: <20080312231330.D60219@odysseus.silby.com> References: <f90b44e40803111756h517b373ala8afdff9395b7fac@mail.gmail.com> <20080312231330.D60219@odysseus.silby.com>
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[-- Attachment #1 --]
On Wed, 12 Mar 2008, Mike Silbersack wrote:
> I think we will need to fix tcpdump before trying to finish diagnosing this
> problem. We were missing key information before.
>
> -Mike
Hm, that was far easier than expected. Patch attached.
Here's what the two tcpdumps show now:
6.3:
IP A > B : S 2575736483:2575736483(0) ack 1762868649 win 65535 <mss 1460,sackOK,eol,eol>
7.0:
IP A > B : S 3304309835:3304309835(0) ack 710421411 win 65535 <mss 1380,sackOK,eol,nop>
That makes the problem quite a bit more clear. Anyone working on this
issue should apply this patch ASAP.
-Mike
[-- Attachment #2 --]
--- print-tcp.c.old 2008-03-12 23:21:52.000000000 -0500
+++ print-tcp.c 2008-03-12 23:24:50.000000000 -0500
@@ -637,8 +637,10 @@
if (datalen != len)
(void)printf("[len %d]", len);
ch = ',';
+#if 0
if (opt == TCPOPT_EOL)
break;
+#endif
}
putchar('>');
}
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