lib/PXElator/client.pm

package client;

use warnings;
use strict;
use autodie;

use File::Slurp;
use Net::Ping;
use Carp qw/confess/;

use server;
use format;

our $debug = $server::debug;

sub mkbasedir {
        my $path = shift;
        $path =~ s{(^.*)/[^/]+$}{$1};
        mkdir $path unless -d $path;
        return $path;
}

sub mac_path { $server::conf . '/mac/' . $_[0] }
sub  ip_path { $server::conf . '/ip/'  . join('/', @_) }
sub conf_value {
        my $path = shift;
        my $value;
        if ( -l $path ) {
                $value = readlink $path;
                $value =~ s{.*/([^/]+)$}{$1};
        } elsif ( -f $path ) {
                $value = read_file $path;
        } else {
                confess "$path not file or symlink";
        }
        return $value;
}

sub conf {
        my $ip  = shift;
        my $name = shift;
        my ( $default, $value );
        if ( $#_ == 0 ) {
                $value = shift;
        } elsif ( $#_ == 1 && $_[0] eq 'default' ) {
                $default = $_[1]
        }

        my $path = ip_path $ip;
        mkdir $path unless -d $path;
        $path .= '/' . $name;

        if ( defined $value ) {
                mkbasedir  $path;
                write_file $path, $value;
                warn "update $path = $value";
        } elsif ( ! -e $path && defined $default ) {
                mkbasedir  $path;
                write_file $path, $default;
                warn "default $path = $default";
                $value = $default;
        } elsif ( -f $path ) {
                $value = read_file $path;
        } else {
                warn "# $name missing $path\n" if $debug;
        }
        return $value;
}

sub next_ip($) {
        my $mac = shift;

        my $p = Net::Ping->new;

        my $prefix = $server::ip;
        $prefix =~ s{\.\d+$}{.};
        my $addr = $server::ip_from || die;
        my $ip = $prefix . $addr;

        while ( -e ip_path($ip) || $p->ping( $ip, 0.7 ) ) {
                $ip = $prefix . $addr++;
                die "all addresses allocated!" if $addr == $server::ip_to;
                warn "skip $ip\n";
        }

        warn "next_ip $ip\n";

        mkdir ip_path($ip);

        my $mac_path = mac_path($mac);
        unlink $mac_path if -e $mac_path;       # XXX audit?
        symlink ip_path($ip), $mac_path;
        write_file ip_path($ip,'mac'), $mac;

        return $ip;

}

sub ip_from_mac($) {
        my $mac = shift;

        $mac = lc $mac;
        $mac =~ s{:}{}g;

        my $mac_path = mac_path $mac;
        return unless -e $mac_path;

        my $ip;

        if ( -f $mac_path ) {
                $ip = read_file $mac_path;
                unlink $mac_path;
                symlink ip_path($ip), $mac_path;
                warn "I: upgrade to mac symlink $mac_path\n";
        } elsif ( -l $mac_path ) {
                $ip = conf_value $mac_path;
        } else {
                die "$mac_path not file or symlink";
        }

        return $ip;
}

sub mac_from_ip($) {
        my $ip = shift;
        conf_value ip_path($ip, 'mac');
}

sub change_ip($$) {
        my ($old, $new) = @_;
        my $mac = mac_from_ip($old);
        rename ip_path($old), ip_path($new);
        unlink mac_path($mac);
        symlink ip_path($new), mac_path($mac);
}

1;
1	dpavlin	156	package client;
2
3			use warnings;
4			use strict;
5			use autodie;
6
7			use File::Slurp;
8	dpavlin	168	use Net::Ping;
9	dpavlin	219	use Carp qw/confess/;
10
11			use server;
12	dpavlin	208	use format;
13	dpavlin	156
14	dpavlin	220	our $debug = $server::debug;
15
16	dpavlin	219	sub mkbasedir {
17			my $path = shift;
18			$path =~ s{(^.*)/[^/]+$}{$1};
19			mkdir $path unless -d $path;
20			return $path;
21			}
22
23	dpavlin	200	sub mac_path { $server::conf . '/mac/' . $_[0] }
24			sub ip_path { $server::conf . '/ip/' . join('/', @_) }
25	dpavlin	219	sub conf_value {
26			my $path = shift;
27			my $value;
28			if ( -l $path ) {
29			$value = readlink $path;
30			$value =~ s{.*/([^/]+)$}{$1};
31			} elsif ( -f $path ) {
32			$value = read_file $path;
33			} else {
34			confess "$path not file or symlink";
35			}
36			return $value;
37			}
38	dpavlin	200
39	dpavlin	156	sub conf {
40			my $ip = shift;
41			my $name = shift;
42			my ( $default, $value );
43			if ( $#_ == 0 ) {
44			$value = shift;
45			} elsif ( $#_ == 1 && $_[0] eq 'default' ) {
46			$default = $_[1]
47			}
48
49	dpavlin	200	my $path = ip_path $ip;
50	dpavlin	156	mkdir $path unless -d $path;
51			$path .= '/' . $name;
52
53			if ( defined $value ) {
54	dpavlin	219	mkbasedir $path;
55	dpavlin	156	write_file $path, $value;
56			warn "update $path = $value";
57			} elsif ( ! -e $path && defined $default ) {
58	dpavlin	219	mkbasedir $path;
59	dpavlin	156	write_file $path, $default;
60			warn "default $path = $default";
61			$value = $default;
62	dpavlin	219	} elsif ( -f $path ) {
63			$value = read_file $path;
64			} else {
65	dpavlin	220	warn "# $name missing $path\n" if $debug;
66	dpavlin	156	}
67			return $value;
68			}
69
70	dpavlin	200	sub next_ip($) {
71			my $mac = shift;
72	dpavlin	168
73			my $p = Net::Ping->new;
74
75			my $prefix = $server::ip;
76			$prefix =~ s{\.\d+$}{.};
77			my $addr = $server::ip_from \|\| die;
78			my $ip = $prefix . $addr;
79
80	dpavlin	200	while ( -e ip_path($ip) \|\| $p->ping( $ip, 0.7 ) ) {
81	dpavlin	168	$ip = $prefix . $addr++;
82			die "all addresses allocated!" if $addr == $server::ip_to;
83			warn "skip $ip\n";
84			}
85
86			warn "next_ip $ip\n";
87	dpavlin	200
88			mkdir ip_path($ip);
89
90	dpavlin	217	my $mac_path = mac_path($mac);
91			unlink $mac_path if -e $mac_path; # XXX audit?
92			symlink ip_path($ip), $mac_path;
93	dpavlin	200	write_file ip_path($ip,'mac'), $mac;
94
95	dpavlin	168	return $ip;
96
97			}
98
99	dpavlin	200	sub ip_from_mac($) {
100	dpavlin	194	my $mac = shift;
101
102			$mac = lc $mac;
103			$mac =~ s{:}{}g;
104
105	dpavlin	200	my $mac_path = mac_path $mac;
106	dpavlin	194	return unless -e $mac_path;
107
108			my $ip;
109
110			if ( -f $mac_path ) {
111			$ip = read_file $mac_path;
112			unlink $mac_path;
113	dpavlin	200	symlink ip_path($ip), $mac_path;
114	dpavlin	194	warn "I: upgrade to mac symlink $mac_path\n";
115			} elsif ( -l $mac_path ) {
116	dpavlin	219	$ip = conf_value $mac_path;
117	dpavlin	194	} else {
118			die "$mac_path not file or symlink";
119			}
120
121			return $ip;
122			}
123
124	dpavlin	200	sub mac_from_ip($) {
125			my $ip = shift;
126	dpavlin	219	conf_value ip_path($ip, 'mac');
127	dpavlin	200	}
128
129			sub change_ip($$) {
130			my ($old, $new) = @_;
131			my $mac = mac_from_ip($old);
132			rename ip_path($old), ip_path($new);
133			unlink mac_path($mac);
134			symlink ip_path($new), mac_path($mac);
135			}
136
137	dpavlin	156	1;