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Article #1866Re: TCP/IP CRC Checking Question....
From: Paul at NCF
Date: Sat, 14 Oct 2006 08:32
Date: Sat, 14 Oct 2006 08:32
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The Network Emulator is a hardware specialised piece of kit by PacketStorm, I've no idea how it does it, but it does. http://www.packetstorm.com/2600e.php We will be looking in to data integrity checking now that the TCP/IP layer can't be relied up on. Thanks for the help. "Bob Gonder" <notbg@notmindspring.invalid> wrote in message news:tfeti2lsedhn069clj0r6455rahk9233vb@4ax.com... > Depends on how you are introducing this bit error. > It seems to me that you would need to splice into the wire, and clamp > the data to ground for one bit-time, precisely during the data segment > of the packet. > Or maybe your Network Emulator allows for non-conforming mid-stream > bit twiddling, as store-modify-forward should entail a new FCS.
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X-Google-Thread: 11508e,6aaa467848354448 X-Google-Attributes: gid11508e,public X-Google-Language: ENGLISH,ASCII-7-bit From: "Paul at NCF" <not plmacca@clara.co.uk> Newsgroups: borland.public.cppbuilder.internet.socket References: <452e72cc$1@newsgroups.borland.com> <511ti29hn8m5vipvi8hqlaajp9gqfs5da3@4ax.com> <452e926b@newsgroups.borland.com> <tfeti2lsedhn069clj0r6455rahk9233vb@4ax.com> Subject: Re: TCP/IP CRC Checking Question.... Date: Sat, 14 Oct 2006 09:32:15 +0100 Lines: 21 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2900.2869 X-RFC2646: Format=Flowed; Original X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 NNTP-Posting-Host: 86.132.188.23 Message-ID: <4530a080@newsgroups.borland.com> X-Trace: newsgroups.borland.com 1160814720 86.132.188.23 (14 Oct 2006 01:32:00 -0700) Path: arc1-ca.pugleaf.net!g2news2.google.com!news3.google.com!border1.nntp.dca.giganews.com!border2.nntp.dca.giganews.com!nntp.giganews.com!newspeer1.nwr.nac.net!colt.net!feeder.news-service.com!newsfeed.freenet.de!news.germany.com!news.mb-net.net!news.taunusstein.net!news.soft-gems.net!open-news-network.org!reader.uucp.at!newsfeed.uucp.at!news.uucp.at!newsgroups.borland.com!not-for-mail