Date: Wed, 31 Mar 1999 17:32:26 +0200 From: Graham Wheeler <gram@cdsec.com> To: Christopher Sedore <cmsedore@mailbox.syr.edu> Cc: Tom Brown <tomb@heliox.com>, hackers@FreeBSD.ORG Subject: Re: How do I write to the /dev/bpf0 interface? Message-ID: <3702400A.9D62AB77@cdsec.com> References: <Pine.SOL.3.95.990331102218.7245A-100000@rodan.syr.edu>
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Christopher Sedore wrote: > > On Wed, 31 Mar 1999, Graham Wheeler wrote: > > > Tom Brown wrote: > > > > > Can anyone please tell me how to post a packet onto my LAN via this > > > interface. > > > > You should just be able to write the frame. Make sure everything is in > > network-byte order. You needn't put in a source Ethernet address as that > > will get filled in, but you do need to put in a destination. > > Note that this is probably a bug in the bpf implementation. BPF/the > kernel shouldn't be messing with the packet on a write to a bpf > descriptor. I've filed a bug report (with patch) that addresses this. > It probably isn't the bpf code that is doing this, but the NIC driver code... -- Dr Graham Wheeler E-mail: gram@cdsec.com Citadel Data Security Phone: +27(21)423-6065/6/7 Firewalls/Virtual Private Networks Fax: +27(21)24-3656 Internet/Intranet Network Specialists Data Security Products WWW: http://www.cdsec.com/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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