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Thank you very much

I followed your advice, but somehow the send doesn't reach the server (on the same host). The network is fine, and Ikegamis script works perfect (except that it is not broadcasting).

#! /usr/bin/perl use warnings; use strict; use Socket qw(:all); $|++; # no suffering from buffering my $udp_port = 9999; socket( UDPSOCK, PF_INET, SOCK_DGRAM, getprotobyname('udp') ) or die " +socket: $!"; select( ( select(UDPSOCK), $|=1 )[0] ); # no suffering from buffering setsockopt( UDPSOCK, SOL_SOCKET, SO_REUSEADDR, 1 ) or die "setsockopt SO_REUSEADDR: $!"; #setsockopt( UDPSOCK, SOL_SOCKET, SO_BROADCAST, 1 ) # or die "setsockopt SO_BROADCAST: $!"; # my $broadcastAddr = sockaddr_in( $udp_port, INADDR_BROADCAST ); my $broadcastAddr = sockaddr_in( $udp_port, INADDR_ANY ); bind( UDPSOCK, $broadcastAddr ) or die "bind failed: $!\n"; my $input; while( my $addr = recv( UDPSOCK, $input, 4096, 0 ) ) { print "$addr => $input\n"; }

#! /usr/bin/perl use warnings; use strict; use Socket qw(:all); use POSIX ":sys_wait_h"; socket( SOCKET, PF_INET, SOCK_DGRAM, getprotobyname("udp") ) or die "Error: can't create an udp socket: $!\n"; select( ( select(SOCKET), $|=1 )[0] ); # no suffering from buffering my $broadcastAddr = sockaddr_in( 9999, INADDR_BROADCAST ); setsockopt( SOCKET, SOL_SOCKET, SO_BROADCAST, 1 ); send( SOCKET, "a" x 4096, 0, $broadcastAddr ) or die "Error at sendding: $!\n"; close SOCKET;

Does anybody know what I'm doing wrong?

My friend intends to use broadcasts to announce a new server going online to a central service. He won't misuse it. I am interested in this topic, because I know a little bit about TCP/IP, but have hardly any knowledge about UDP and broadcasts.

Best regards,
perl -e "s>>*F>e=>y)\*martinF)stronat)=>print,print v8."

In reply to Re^2: UDP-Broadcast with socket by strat
in thread UDP-Broadcast with socket by strat

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