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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 server; |
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use File::Slurp; |
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use Net::Ping; |
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use format; |
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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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|
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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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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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write_file $path, $default; |
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warn "default $path = $default"; |
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$value = $default; |
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} elsif ( -e $path ) { |
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if ( -l $path ) { |
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$value = readlink $path; |
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$value =~ s{.*/([^/]+)$}{$1}; |
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} else { |
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$value = read_file $path; |
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} |
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} |
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return $value; |
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} |
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|
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sub next_ip($) { |
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my $mac = shift; |
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|
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my $p = Net::Ping->new; |
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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) || $p->ping( $ip, 0.7 ) ) { |
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$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 $ip\n"; |
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|
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mkdir ip_path($ip); |
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|
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my $mac_path = mac_path($mac); |
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unlink $mac_path if -e $mac_path; # XXX audit? |
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symlink ip_path($ip), $mac_path; |
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write_file ip_path($ip,'mac'), $mac; |
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|
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return $ip; |
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|
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} |
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|
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sub ip_from_mac($) { |
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my $mac = shift; |
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|
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$mac = lc $mac; |
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$mac =~ s{:}{}g; |
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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 = readlink $mac_path; |
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$ip =~ s{^.+/([^/]+)$}{$1}; |
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} else { |
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die "$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 $ip = shift; |
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return read_file ip_path($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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my $mac = mac_from_ip($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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} |
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|
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