Date: Fri, 29 Sep 2000 11:40:26 -0500 From: "Ping Yuan" <pyuan@ece.rice.edu> To: "Ruslan Ermilov" <ru@sunbay.com> Cc: <freebsd-net@freebsd.org> Subject: Re: IP header. Message-ID: <007a01c02a33$f910f270$42042a80@teddy.ece.rice.edu>
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>On Fri, Sep 29, 2000 at 11:04:39AM -0500, Ping Yuan wrote: >> Hi, >> >> I am now writing a traffic generator. I want to write something in the IP >> header of every packet before I send it out. Is this possible? If yes, how >> to implement it? If not, is there any other solutions? >> >You can do that by constructing an IP packet with header and sending it to >raw IP socket with IP_HDRINCL socket option set. See ip(4) page for details. > Then, will this IP header be the header of the UDP packet I generated? I mean, if I run tcpdump at the destination host to monitor all the UDP packets, can the bits I set in the ip header be identified? Thanks, -ping > >Cheers, >-- >Ruslan Ermilov Oracle Developer/DBA, >ru@sunbay.com Sunbay Software AG, >ru@FreeBSD.org FreeBSD committer, >+380.652.512.251 Simferopol, Ukraine > >http://www.FreeBSD.org The Power To Serve >http://www.oracle.com Enabling The Information Age > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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