21.03.2018 3:09, Ronald F. Guilmette wrote: > I'm going to be doing some stuff with raw sockets pretty soon, and > while scrounging around, looking for some nice coding examples, I > found the following very curious comment on one particular message > board: > > > https://stackoverflow.com/questions/7048448/raw-sockets-on-bsd-operating-systems > > "Using raw sockets isn't hard but it's not entirely portable. For > instance, both in BSD and in Linux you can send whatever you want, > but in BSD you can't receive anything that has a handler (like TCP > and UDP)." > > So, first question: Is the above comment actually true & accurate?
Not for FreeBSD. > Second question: If the above assertion is actually true, then how can > nmap manage to work so well on FreeBSD, despite what would appear to be > this insurmountable stumbling block (of not being able to receive replies)? nmap uses libdnet that provides some portability layer, including RAW socket operations. It uses bundled stripped-down version but we have "normal" one as net/libdnet port/package. You should consider using it too as convenience layer. _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
