Karel Kulhavy <[EMAIL PROTECTED]> writes:
> 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
...
When I wrote something using SOCK_RAW, some time back, I ended up
digging through kernel sources and experimenting to figure out how it
worked. There were some non-obvious features like setting the address
family, using setsockopt(,IPPROTO_IP,IP_HDRINCL, and &etc. that
were good to know.
You might also want to check out tcpdump and libpcap - either the
source for coding examples, or the tool or library for a higher level
interface to generate packet traffic.
AF_ISO is obselete - it got removed in openbsd some time ago.
4.4bsd had an arpa funded implementation of all of the iso
networking standards, but somehow these just never did displace TCP/IP.
For a dated but entertaining perspective on the ISO networking reference
model vs. ietf, check out:
RFC 871
A Perspective On The Arpanet Reference Model
M.A. Padlipsky
It's fashionable today to map TCP/IP layers into the iso networking
reference model, but this is merely for "human" convenience, it's not
something you'd code into a program.
-Marcus Watts
