On Tue, 24 Oct 2006, Karel Kulhavy wrote:
> How do I do this C call taken from a Linux program on OpenBSD?
>
> socket(PF_PACKET, SOCK_RAW, htons(0x4254))
>
> man socket on OpenBSD offers AF_ISO (ISO protocols) which sounds like it
> could be access to individual ISO stack layers including layer 2? However
> the string ISO is not mentioned anywhere else in the manual page so the
> documentation on this seems to be missing (completeness of manual pages,
> hee, OpenBSD?)
AF_ISO refers to the ISO protocol that was supposed to be a
replacement for TCP/IP, but which never took off. A few releases ago
it was removed from the src tree. Any remaining ref to AF_ISO should
be removed.
>
> "The types SOCK_RAW, which is available only to the superuser, and SOCK_RDM,
> which is planned, but not yet implemented, are not described here."
>
> Is SOCK_RAW described anywhere else in the OpenBSD manpages? If yes, where?
man 4 ip has some more details for using raw sockets, which can be
sued to send raw IP packets. Raw ethernet data is something different,
though. You can use bpf(4) to send raw ethernet packets.
>
> The SEE ALSO section doesn't also contain any entries which would evoke
> relation to AF_ISO or SOCK_RAW.
>
> I basically need to fill in my own Ethernet frame, including DST and SRC MAC,
> with 3 possible patterns - random data, all zeroes, or alternating 01010101,
> and send lots of packets of this type. Then calculate from ifconfig how many
> were received on loopback and calculate bit error rate of the link for
> different electrical frequencies occuring in the data stream.
-Otto
