Messages in this thread | | | Date | Wed, 19 Sep 2007 11:38:57 -0700 | From | Rick Jones <> | Subject | Re: follow-up: discrepancy with POSIX |
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Andi Kleen wrote: > On Wed, Sep 19, 2007 at 11:02:00AM -0700, Ulrich Drepper wrote: > >>>on UDP/RAW and it's certainly possible to connect() to that. >> >>Where do you get this from? And where is this implemented? I don't > > > Sorry it's actually loopback, not broadcast as implemented in Linux. > In Linux it's implemented in ip_route_output_slow(). Essentially > converted to 127.0.0.1 > > I think it's traditional BSD behaviour but couldn't find it on > a quick look in FreeBSD source (but haven't looked very intensively)
One has to set their way-back machine pretty far back to find the *BSD bits which used 0.0.0.0 as the "all nets, all subnets" (to mis-use a term) broadcast IPv4 address when sending. Perhaps as far back as the time before HP-UX 7 or SunOS4. The bit errors in my dimm memory get pretty dense that far back...
It has hung-on in various places (stacks) as an "accepted" broadcast IP in the receive path, but not the send path for quite possibly decades now.
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