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dpavlin |
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#!/usr/bin/perl |
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use warnings; |
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use strict; |
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use IO::Socket::INET; |
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use IO::Select; |
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use Data::Dump qw(dump); |
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use Storable qw(); |
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my $listen_port = 4444; |
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my $node_path = '/tmp/client.pl'; |
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my $lsn = IO::Socket::INET->new(Listen => 1, LocalPort => $listen_port, Reuse => 1) or exit; |
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my $sel = IO::Select->new($lsn); |
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dpavlin |
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my $info; |
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sub info { |
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my $port = shift; |
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push @{ $info->{$port} }, [ @_ ]; |
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} |
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dpavlin |
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sub fork_node { |
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my ( $port, $host ) = @_; |
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if ( my $pid = fork ) { |
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# parent |
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info $port => 'forked', $pid; |
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return $port; |
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} elsif ( ! defined $pid ) { |
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warn "can't fork $host $port"; |
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return; |
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} else { |
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# child |
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my $cmd = qq|ssh -R $port:127.0.0.1:$listen_port $host $node_path $port|; |
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warn "# exec: $cmd\n"; |
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exec $cmd; |
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} |
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} |
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my $node_port = 4000; |
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foreach my $host ( qw/localhost tab.lan llin.lan/ ) { |
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system "scp client.pl $host:$node_path"; |
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fork_node( $node_port++, $host ); |
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} |
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my $session; |
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while (1) { |
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for my $sock ($sel->can_read(1)) { |
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if ($sock == $lsn) { |
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my $new = $lsn->accept; |
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$sel->add($new); |
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dpavlin |
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$session->{$new} = $new->peerport; |
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dpavlin |
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warn "[socket] connect\n"; |
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Storable::store_fd( { ping => 1 }, $new ); |
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info 0 => 'ping', $new->peerport; |
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} else { |
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my $data = eval { Storable::fd_retrieve( $sock ) }; |
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if ( $@ ) { |
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delete $session->{$sock}; |
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warn "[socket] disconnect: $@\n"; |
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$sel->remove($sock); |
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$sock->close; |
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} else { |
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warn "<<<< ", dump($data), $/; |
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if ( $data->{repl} ) { |
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my $response = { repl => $$, info => $info }; |
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Storable::store_fd( $response, $sock ); |
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} elsif ( $data->{ping} ) { |
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$info->{_peer_port}->{$sock->peerport} = $data->{port}; |
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info $data->{port} => 'peer port', $sock->peerport; |
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dpavlin |
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} |
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} |
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} |
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} |
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} |
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