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Re: UDP Client and Server in one

by tybalt89 (Curate)
on Mar 06, 2017 at 22:00 UTC ( #1183798=note: print w/replies, xml ) Need Help??


in reply to UDP Client and Server in one

#!/usr/bin/perl # http://perlmonks.org/?node_id=1183721 use strict; use warnings; use IO::Socket; use IO::Select; use Time::HiRes 'time'; @ARGV and $ARGV[0] eq 'tester' and do_test_routine(); my $from; my $PORTNO = 7090; my $timerinterval = 5; my $timedresponse = "default timed response\n"; my $MAXLEN = 512; my $sock = IO::Socket::INET->new(LocalPort => $PORTNO, Proto => 'udp') or die $@; my $sel = IO::Select->new($sock); my $nexttimer = time + $timerinterval; for(;;) { my $timeout = $nexttimer - time; if( $timeout <= 0 ) { warn "timed out @{[int time - $^T]}\n"; if( defined $from ) #send time-triggered status { $sock->send($timedresponse, 0, $from); } $nexttimer = $timerinterval + time; } else { for my $fh ( $sel->can_read($timeout) ) { $from = $fh->recv(my $request, $MAXLEN); my $response = parseRequest($request); $fh->send($response, 0, $from); } } } sub parseRequest { warn "got @_"; return "canned response\n"; } sub do_test_routine # for testing purposes only { my $sock = IO::Socket::INET->new(LocalPort => 7091, Proto => 'udp', PeerPort => 7090, PeerHost => 'localhost', ) or die $@; $sock->send("a test message\n"); for(;;) { $sock->recv(my $buf, 512); warn "tester got: $buf"; } }

semi-tested :)

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