> I am working with UNIX Sockets and have some questions
> that I cant seem to find answers to on the web.
Since the questions was interesting enough to me, I thought
I would research the answer. "Perl Cookbook" contains an
entire chapter on this. I am not a socket programmer!
> 1: Are UNIX sockets bi-directional?
>From "man 2 socket" (linux):
SOCK_STREAM
Provides sequenced, reliable, two-way, connection-based byte
streams. An out-of-band data transmission mechanism may be sup-
ported.
SOCK_DGRAM
Supports datagrams (connectionless, unreliable messages of a
fixed maximum length).
If you choose PF_UNIX and SOCK_STREAM, then you would expect
something akin to TCP. Similarly, PF_UNIX and SOCK_DGRAM
would give something akin to UDP.
So, datagrams are connectionless, and by extension are
one way. With a datagram, a message is transferred
between processes, and that is that.
> 2: If so, what is the proper way to 'setup' the connection? ...
Try choosing SOCK_STREAM instead of SOCK_DGRAM.
> 3: Do UNIX sockets have less overhead than INET sockets?
I believe so, but the difference might not be that great. Which
seams more appropriate?
May the man pages help you in your quest.
Jonathan Paton
--
#!perl
$J=' 'x25 ;for (qq< 1+10 9+14 5-10 50-9 7+13 2-18 6+13
17+6 02+1 2-10 00+4 00+8 3-13 3+12 01-5 2-10 01+1 03+4
00+4 00+8 1-21 01+1 00+5 01-7 >=~/ \S\S \S\S /gx) {m/(
\d+) (.+) /x,, vec$ J,$p +=$2 ,8,= $c+= +$1} warn $J,,
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