lib/PXElator/client.pm

package client;

use warnings;
use strict;
use autodie;

use File::Slurp;
use Data::Dump qw/dump/;
use File::Path;

use server;
use format;
use ip;
use ping;

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 {
                warn "W: $path not file or symlink\n";
        }
        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 all_conf {
        my $ip = shift;
        my $path = ip_path $ip || return;
        my $conf;
        foreach my $file ( glob("$path/*") ) {
                my $name = $file;
                $name =~ s{^.+/([^/]+)$}{$1};
                $conf->{ $name } = read_file $file;
        }
        return $conf;
}
sub next_ip($) {
        my $mac = shift;
        $mac = format::mac($mac);

        if ( $server::new_clients-- ) {
                warn "# clients left: $server::new_clients\n";
        } else {
                warn "W: no new clients accepted";
                return '0.0.0.0';
        }

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

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

        warn "next_ip $ip\n";

        save_ip_mac( $ip, $mac );

        return $ip;
}

sub save_ip_mac {
        my ($ip,$mac) = @_;
        $mac = format::mac($mac);
        return if $mac eq '00:00:00:00:00:00';

        mkdir ip_path($ip) unless -e ip_path($ip);

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

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

        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) = @_;
        return if $old eq $new;
        my $mac = mac_from_ip($old) || die "no mac for $old";
        rename ip_path($old), ip_path($new);
        unlink mac_path($mac);
        symlink ip_path($new), mac_path($mac);
        return $new;
}

sub all_ips {
        sort { ip::to_int($a) cmp ip::to_int($b) }
        map {
                my $ip = $_;
                $ip =~ s{^.+/ip/}{};
                $ip;
        } glob("$server::conf/ip/*") 
}

sub remove {
        my $ip = shift;
        unlink $_ foreach grep { -e $_ } ( glob "$server::conf/ip/$ip/*" );
        if ( my $mac = mac_from_ip $ip ) {
                unlink "$server::conf/mac/$mac";
        }
        rmtree "$server::conf/ip/$ip";
}

sub arp_mac_dev {
        my $arp = {
                map {
                        my @c = split(/\s+/,$_);
                        if ( $#c == 5 ) {
                                client::save_ip_mac( $c[0], $c[3] );
                                ( uc $c[3] => $c[5] )
                        } else {
                        }
                } read_file('/proc/net/arp')
        };

        warn "# arp ",dump( $arp );
        return $arp;
}

1;
1	dpavlin	156	package client;
2
3			use warnings;
4			use strict;
5			use autodie;
6
7			use File::Slurp;
8	dpavlin	329	use Data::Dump qw/dump/;
9	dpavlin	395	use File::Path;
10	dpavlin	219
11			use server;
12	dpavlin	208	use format;
13	dpavlin	322	use ip;
14	dpavlin	330	use ping;
15	dpavlin	156
16	dpavlin	220	our $debug = $server::debug;
17
18	dpavlin	219	sub mkbasedir {
19			my $path = shift;
20			$path =~ s{(^.*)/[^/]+$}{$1};
21			mkdir $path unless -d $path;
22			return $path;
23			}
24
25	dpavlin	200	sub mac_path { $server::conf . '/mac/' . $_[0] }
26			sub ip_path { $server::conf . '/ip/' . join('/', @_) }
27	dpavlin	219	sub conf_value {
28			my $path = shift;
29			my $value;
30			if ( -l $path ) {
31			$value = readlink $path;
32			$value =~ s{.*/([^/]+)$}{$1};
33			} elsif ( -f $path ) {
34			$value = read_file $path;
35			} else {
36	dpavlin	244	warn "W: $path not file or symlink\n";
37	dpavlin	219	}
38			return $value;
39			}
40	dpavlin	200
41	dpavlin	156	sub conf {
42			my $ip = shift;
43			my $name = shift;
44			my ( $default, $value );
45			if ( $#_ == 0 ) {
46			$value = shift;
47			} elsif ( $#_ == 1 && $_[0] eq 'default' ) {
48			$default = $_[1]
49			}
50
51	dpavlin	200	my $path = ip_path $ip;
52	dpavlin	156	mkdir $path unless -d $path;
53			$path .= '/' . $name;
54
55			if ( defined $value ) {
56	dpavlin	219	mkbasedir $path;
57	dpavlin	156	write_file $path, $value;
58			warn "update $path = $value";
59			} elsif ( ! -e $path && defined $default ) {
60	dpavlin	219	mkbasedir $path;
61	dpavlin	156	write_file $path, $default;
62			warn "default $path = $default";
63			$value = $default;
64	dpavlin	219	} elsif ( -f $path ) {
65			$value = read_file $path;
66			} else {
67	dpavlin	220	warn "# $name missing $path\n" if $debug;
68	dpavlin	156	}
69			return $value;
70			}
71
72	dpavlin	305	sub all_conf {
73			my $ip = shift;
74			my $path = ip_path $ip \|\| return;
75			my $conf;
76			foreach my $file ( glob("$path/*") ) {
77			my $name = $file;
78			$name =~ s{^.+/([^/]+)$}{$1};
79			$conf->{ $name } = read_file $file;
80			}
81			return $conf;
82			}
83	dpavlin	200	sub next_ip($) {
84			my $mac = shift;
85	dpavlin	313	$mac = format::mac($mac);
86	dpavlin	168
87	dpavlin	399	if ( $server::new_clients-- ) {
88			warn "# clients left: $server::new_clients\n";
89	dpavlin	391	} else {
90			warn "W: no new clients accepted";
91			return '0.0.0.0';
92			}
93
94	dpavlin	168	my $prefix = $server::ip;
95			$prefix =~ s{\.\d+$}{.};
96			my $addr = $server::ip_from \|\| die;
97			my $ip = $prefix . $addr;
98
99	dpavlin	330	while ( -e ip_path($ip) \|\| ping::host($ip) ) {
100	dpavlin	168	$ip = $prefix . $addr++;
101			die "all addresses allocated!" if $addr == $server::ip_to;
102			warn "skip $ip\n";
103			}
104
105			warn "next_ip $ip\n";
106	dpavlin	200
107	dpavlin	244	save_ip_mac( $ip, $mac );
108
109			return $ip;
110			}
111
112			sub save_ip_mac {
113			my ($ip,$mac) = @_;
114	dpavlin	313	$mac = format::mac($mac);
115	dpavlin	325	return if $mac eq '00:00:00:00:00:00';
116	dpavlin	244
117	dpavlin	254	mkdir ip_path($ip) unless -e ip_path($ip);
118	dpavlin	200
119	dpavlin	217	my $mac_path = mac_path($mac);
120	dpavlin	286	unlink $mac_path if -l $mac_path; # XXX audit?
121	dpavlin	217	symlink ip_path($ip), $mac_path;
122	dpavlin	323	write_file( ip_path($ip,'mac'), $mac );
123	dpavlin	168	}
124
125	dpavlin	200	sub ip_from_mac($) {
126	dpavlin	194	my $mac = shift;
127	dpavlin	313	$mac = format::mac($mac);
128	dpavlin	194
129	dpavlin	200	my $mac_path = mac_path $mac;
130	dpavlin	194	return unless -e $mac_path;
131
132			my $ip;
133
134			if ( -f $mac_path ) {
135			$ip = read_file $mac_path;
136			unlink $mac_path;
137	dpavlin	200	symlink ip_path($ip), $mac_path;
138	dpavlin	194	warn "I: upgrade to mac symlink $mac_path\n";
139			} elsif ( -l $mac_path ) {
140	dpavlin	219	$ip = conf_value $mac_path;
141	dpavlin	194	} else {
142			die "$mac_path not file or symlink";
143			}
144
145			return $ip;
146			}
147
148	dpavlin	200	sub mac_from_ip($) {
149			my $ip = shift;
150	dpavlin	219	conf_value ip_path($ip, 'mac');
151	dpavlin	200	}
152
153			sub change_ip($$) {
154			my ($old, $new) = @_;
155	dpavlin	323	return if $old eq $new;
156			my $mac = mac_from_ip($old) \|\| die "no mac for $old";
157	dpavlin	200	rename ip_path($old), ip_path($new);
158			unlink mac_path($mac);
159			symlink ip_path($new), mac_path($mac);
160	dpavlin	323	return $new;
161	dpavlin	200	}
162
163	dpavlin	322	sub all_ips {
164			sort { ip::to_int($a) cmp ip::to_int($b) }
165			map {
166			my $ip = $_;
167			$ip =~ s{^.+/ip/}{};
168			$ip;
169			} glob("$server::conf/ip/*")
170			}
171
172	dpavlin	323	sub remove {
173			my $ip = shift;
174			unlink $_ foreach grep { -e $_ } ( glob "$server::conf/ip/$ip/*" );
175			if ( my $mac = mac_from_ip $ip ) {
176			unlink "$server::conf/mac/$mac";
177			}
178	dpavlin	395	rmtree "$server::conf/ip/$ip";
179	dpavlin	323	}
180
181	dpavlin	329	sub arp_mac_dev {
182			my $arp = {
183			map {
184			my @c = split(/\s+/,$_);
185			if ( $#c == 5 ) {
186			client::save_ip_mac( $c[0], $c[3] );
187			( uc $c[3] => $c[5] )
188			} else {
189			}
190			} read_file('/proc/net/arp')
191			};
192
193			warn "# arp ",dump( $arp );
194			return $arp;
195			}
196
197	dpavlin	156	1;