#!/opt/perl5/bin/perl -w # # Licensed to the Apache Software Foundation (ASF) under one or more # contributor license agreements. See the NOTICE file distributed with # this work for additional information regarding copyright ownership. # The ASF licenses this file to You under the Apache License, Version 2.0 # (the "License"); you may not use this file except in compliance with # the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. use strict; use Socket; use IO::Socket; use Sys::Hostname; main(); exit(0); sub main() { my $MAX_MSG_SIZE = 16384; # 16KBytes should be enough... my $svrport = 8300; my $svriaddr = gethostbyname(hostname()); my $svrproto = getprotobyname('udp'); my $svrpaddr = sockaddr_in($svrport, $svriaddr); socket(SOCKET, PF_INET, SOCK_DGRAM, $svrproto) || die "socket: $!"; bind(SOCKET, $svrpaddr) || die "bind: $!"; my $rin = ''; vec($rin, fileno(SOCKET), 1) = 1; # timeout after 10.0 seconds # at some time, I'm going to add signal handlers so that signals can be # sent to cause logfile rollover, or tidy exit...then the timeout will # come in useful.. my $exit = 0; while (!$exit) { my $rout = $rin; # select(readvec, writevec, exceptionvec, timeout) # : returns # of selected filehandles, modifies # vector parameters so that set bits indicate # filehandles which are readable, writable or have # an exception state my $nSelected = select($rout, undef, undef, 10.0); if ($nSelected == 0) { # timedout : go back to start of loop next; } my $msgData = ''; my $clientpaddr = recv(SOCKET, $msgData, $MAX_MSG_SIZE, 0); if (!$clientpaddr) { die "recv: $!"; } my ($clientport, $clientiaddr) = sockaddr_in($clientpaddr); my $clienthost = gethostbyaddr($clientiaddr, AF_INET); if (!$clienthost) { # unable to determine name for client : show raw ip address $clienthost = inet_ntoa($clientiaddr); } print "$clienthost:$msgData\n"; } }