Greetings,
I wonder about the relevance and consideration of XOPEN sockets.
For certain XOPEN defines, i.e. socket() is mapped to __xnet_socket(),
which results in so_socket() being called with SOV_XPG4_2. However, this
does not seem to make much difference in the code, though, as I only
found checks like this one:
if ((so->so_version == SOV_XPG4_2) &&
(error == EHOSTUNREACH)) {
error = ENETUNREACH;
}
[from socksctp.c - and sctp seems to be the only protocol that considers
this at all, judging from the code searches I did:
http://src.opensolaris.org/source/search?q=SOV_XPG4_2&defs=&refs=&path=&hist=&project=%2Fvolo]
So, is there anything else than this error code that makes a difference?
Conc. the relevance: X/Open sockets have been dropped from Stevens UNP
vol1, but it's still around: the latest binary from MySQL Cluster uses
__xnet_socket().
The reason why I care at all is that we are implementing plug-in sockets
for low-latency communication (see project volo).
Joachim
--
Joachim Worringen, Software Architect, Dolphin Interconnect Solutions
phone ++49/(0)228/324 08 17 - http://www.dolphinics.com
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