I'm writing a multi-threaded networking application using
mDNSResponder-107.6 on OpenBSD 4.0 and have some intermittent problem
with some service announcements not been reported (e.g. when using
dns-sd -B). Same application works fine on OS/X Tiger and FreeBSD
4.1. It might be related to a problem with OpenBSD, as discovered
with pcap (pcap_loop blocking threads) and related select(), see below.
I tested this on OpenBSD 3.8 and 4.0. Both OS have the same problem.
I did apply the patch recently shown on this mailing list about
getting old/stale records delivered. That fix helped me with that
problem.
Is this by any chance a known issue and is there a fix, ev in the CVS
tree?
"Note that in some systems with BPF (older versions of
{Free,Net,Open,Dragonfly}BSD, current versions of Mac OS X), select()
(and poll()) don't work correctly on BPF devices, and so you have to
work around that. (Note also that poll() doesn't work on *ANY*
character special file, including BPF devices but also including
ttys/ ptys, in OS X 10.4[.x], i.e. Tiger.)"
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