141 lines
3.5 KiB
Perl
141 lines
3.5 KiB
Perl
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#----------------------------------------------------------------------
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# Copyright 2005-2006 Mitel Networks Corporation
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# This program is free software; you can redistribute it and/or
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# modify it under the same terms as Perl itself.
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#----------------------------------------------------------------------
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package esmith::tcpsvd;
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use strict;
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=pod
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=head1 NAME
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esmith::tcpsvd - Manage tcpsvd "peers" directory
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=head1 SYNOPSIS
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use esmith::tcpsvd;
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esmith::tcpsvd::configure_peers($service)
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=head1 DESCRIPTION
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This module provides utility functions for use with tcpsvd from Gerrit
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Pape's ipsvd package - see http://smarden.org/ipsvd/.
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=cut
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use esmith::NetworksDB;
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use esmith::ConfigDB;
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use esmith::util;
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use esmith::lockfile;
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use Carp;
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=head2 configure_peers($service [, $peers_directory] )
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configure_peers() configures the "peers" direectory used by tcpsvd for
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access control and environment maipulation. $service identifies the name
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of the service managed by supervise or runit. The peers directory (as
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specified by the optional $peers_directory argument, defaulting to
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"/var/service/$service/peers") is expected to contain files "0" defining
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access conditions for public (default) accesss, and "local", defining
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access conditions for local access. configure_peers() creates a set of
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symlinks so that tcpsvd uses "local" for all local network access to
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the service.
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See http://smarden.org/ipsvd/ipsvd-instruct.5.html for all details of
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the contents of the peers directory.
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=cut
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sub configure_peers
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{
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my $service = shift;
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my $peers = shift || "/var/service/$service/peers";
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unless (opendir(PEERS, $peers))
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{
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carp "Cannot read peers directory: $!";
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return;
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}
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my $config = esmith::ConfigDB->open;
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unless ($config)
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{
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carp "Could not open config db.";
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return;
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}
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$service = $config->get($service);
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unless ($service)
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{
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carp "No service record for $service";
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return;
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}
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my $access = $service->prop('access') || "localhost";
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my $nets = esmith::NetworksDB->open;
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unless ($nets)
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{
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carp "Could not open networks db.";
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return;
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}
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my $gw = $config->get('GatewayIP');
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# Make a list of local networks, in prefix format
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my %nets = ($access eq "localhost") ? () :
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map
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{
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$_ => 1,
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}
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map
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{
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esmith::util::computeAllLocalNetworkPrefixes($_->key, $_->prop('Mask'));
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}
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($nets->get_all_by_prop('type', 'network'));
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$nets{'127.0.0.1'} = 1;
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# Setup lock on peers directory while we manipulate it
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my $lock = esmith::lockfile::LockFileOrWait("$peers/local");
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# Now manage a set of symlinks to the "local" instructions file
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foreach my $insfile (readdir (PEERS))
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{
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next unless -l "$peers/$insfile";
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if (exists $nets{$insfile})
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{
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# Cross this one off the list so that we don't bother creating it
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delete $nets{$insfile};
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}
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else
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{
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# We no longer need this entry
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unlink "$peers/$insfile" or
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warn "Could not delete access control file $peers/$insfile: $!\n";
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}
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}
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closedir(PEERS);
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foreach my $insfile (keys %nets)
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{
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symlink "local", "$peers/$insfile" or
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warn "Cannot add instructions file for $peers/$insfile: $!\n";
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}
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if (defined $gw)
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{
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# We have a defined gateway address - make sure that the router doesn't have
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# relay privileges
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my $gw_ip = $gw->value;
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unlink "$peers/$gw_ip";
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symlink "0", "$peers/$gw_ip" or
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warn "Cannot add instructions file for $peers/$gw_ip: $!\n";
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}
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# Unlock peers directory
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$lock && esmith::lockfile::UnlockFile($lock);
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}
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1;
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