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package client; |
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|
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use warnings; |
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use strict; |
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use autodie; |
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|
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use File::Slurp; |
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use Data::Dump qw/dump/; |
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|
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use server; |
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use format; |
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use ip; |
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use ping; |
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|
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our $debug = $server::debug; |
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|
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sub mkbasedir { |
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my $path = shift; |
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$path =~ s{(^.*)/[^/]+$}{$1}; |
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mkdir $path unless -d $path; |
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return $path; |
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} |
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|
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sub mac_path { $server::conf . '/mac/' . $_[0] } |
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sub ip_path { $server::conf . '/ip/' . join('/', @_) } |
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sub conf_value { |
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my $path = shift; |
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my $value; |
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if ( -l $path ) { |
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$value = readlink $path; |
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$value =~ s{.*/([^/]+)$}{$1}; |
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} elsif ( -f $path ) { |
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$value = read_file $path; |
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} else { |
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warn "W: $path not file or symlink\n"; |
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} |
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return $value; |
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} |
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|
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sub conf { |
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my $ip = shift; |
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my $name = shift; |
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my ( $default, $value ); |
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if ( $#_ == 0 ) { |
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$value = shift; |
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} elsif ( $#_ == 1 && $_[0] eq 'default' ) { |
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$default = $_[1] |
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} |
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|
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my $path = ip_path $ip; |
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mkdir $path unless -d $path; |
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$path .= '/' . $name; |
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|
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if ( defined $value ) { |
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mkbasedir $path; |
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write_file $path, $value; |
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warn "update $path = $value"; |
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} elsif ( ! -e $path && defined $default ) { |
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mkbasedir $path; |
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write_file $path, $default; |
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warn "default $path = $default"; |
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$value = $default; |
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} elsif ( -f $path ) { |
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$value = read_file $path; |
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} else { |
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warn "# $name missing $path\n" if $debug; |
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} |
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return $value; |
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} |
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|
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sub all_conf { |
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my $ip = shift; |
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my $path = ip_path $ip || return; |
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my $conf; |
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foreach my $file ( glob("$path/*") ) { |
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my $name = $file; |
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$name =~ s{^.+/([^/]+)$}{$1}; |
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$conf->{ $name } = read_file $file; |
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} |
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return $conf; |
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} |
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sub next_ip($) { |
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my $mac = shift; |
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$mac = format::mac($mac); |
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|
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if ( my $clients_left = server::shared( 'new_clients' ) ) { |
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server::shared( 'new_clients', $clients_left - 1 ); |
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} else { |
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warn "W: no new clients accepted"; |
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return '0.0.0.0'; |
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} |
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|
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my $prefix = $server::ip; |
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$prefix =~ s{\.\d+$}{.}; |
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my $addr = $server::ip_from || die; |
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my $ip = $prefix . $addr; |
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|
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while ( -e ip_path($ip) || ping::host($ip) ) { |
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$ip = $prefix . $addr++; |
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die "all addresses allocated!" if $addr == $server::ip_to; |
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warn "skip $ip\n"; |
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} |
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|
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warn "next_ip $ip\n"; |
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|
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save_ip_mac( $ip, $mac ); |
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|
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return $ip; |
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} |
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|
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sub save_ip_mac { |
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my ($ip,$mac) = @_; |
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$mac = format::mac($mac); |
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return if $mac eq '00:00:00:00:00:00'; |
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|
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mkdir ip_path($ip) unless -e ip_path($ip); |
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|
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my $mac_path = mac_path($mac); |
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unlink $mac_path if -l $mac_path; # XXX audit? |
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symlink ip_path($ip), $mac_path; |
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write_file( ip_path($ip,'mac'), $mac ); |
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} |
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|
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sub ip_from_mac($) { |
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my $mac = shift; |
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$mac = format::mac($mac); |
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|
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my $mac_path = mac_path $mac; |
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return unless -e $mac_path; |
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|
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my $ip; |
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|
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if ( -f $mac_path ) { |
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$ip = read_file $mac_path; |
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unlink $mac_path; |
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symlink ip_path($ip), $mac_path; |
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warn "I: upgrade to mac symlink $mac_path\n"; |
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} elsif ( -l $mac_path ) { |
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$ip = conf_value $mac_path; |
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} else { |
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die "$mac_path not file or symlink"; |
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} |
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|
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return $ip; |
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} |
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|
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sub mac_from_ip($) { |
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my $ip = shift; |
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conf_value ip_path($ip, 'mac'); |
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} |
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|
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sub change_ip($$) { |
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my ($old, $new) = @_; |
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return if $old eq $new; |
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my $mac = mac_from_ip($old) || die "no mac for $old"; |
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rename ip_path($old), ip_path($new); |
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unlink mac_path($mac); |
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symlink ip_path($new), mac_path($mac); |
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return $new; |
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} |
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|
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sub all_ips { |
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sort { ip::to_int($a) cmp ip::to_int($b) } |
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map { |
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my $ip = $_; |
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$ip =~ s{^.+/ip/}{}; |
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$ip; |
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} glob("$server::conf/ip/*") |
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} |
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|
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sub remove { |
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my $ip = shift; |
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unlink $_ foreach grep { -e $_ } ( glob "$server::conf/ip/$ip/*" ); |
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if ( my $mac = mac_from_ip $ip ) { |
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unlink "$server::conf/mac/$mac"; |
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} |
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rmdir "$server::conf/ip/$ip"; |
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} |
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|
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sub arp_mac_dev { |
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my $arp = { |
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map { |
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my @c = split(/\s+/,$_); |
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if ( $#c == 5 ) { |
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client::save_ip_mac( $c[0], $c[3] ); |
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( uc $c[3] => $c[5] ) |
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} else { |
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} |
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} read_file('/proc/net/arp') |
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}; |
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|
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warn "# arp ",dump( $arp ); |
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return $arp; |
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} |
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|
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