4 Sep
2003
4 Sep
'03
3:46 a.m.
--- list-tuhs(a)cosmic.com wrote:
On Wed, 3 Sep 2003 14:39:28 +0200 (CEST), Rico
Pajarola <rp(a)servium.ch>
wrote:
It's actually the pcap library not the bpf driver that can't write in FreeBSD
but can in NetBSD.
http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libpcap/pcap-bpf.c
versus:
http://www.freebsd.org/cgi/cvsweb.cgi/src/contrib/libpcap/pcap-bpf.c
http://www.freebsd.org/cgi/cvsweb.cgi/src/lib/libpcap/Attic/pcap-bpf.c
on FreeBSD you can't send packets directly over bpf (at least not
the same way you can on Net-/OpenBSD).
FreeBSD certainly does let you send packets over bpf. If you open the
device (e.g. /dev/bpf0) for both reading and writing, you can write()
a buffer to the device, and the contents of that buffer will be sent
verbatim from that device. I do this all the time for protocol
testing. I'm not running NetBSD or OpenBSD currently, so
perhaps they support a
richer interface than FreeBSD does, but the essentials are indeed
there.
--Mirian
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