| 1 |
package client; |
| 2 |
|
| 3 |
use warnings; |
| 4 |
use strict; |
| 5 |
use autodie; |
| 6 |
|
| 7 |
use File::Slurp; |
| 8 |
use Data::Dump qw/dump/; |
| 9 |
use File::Path; |
| 10 |
|
| 11 |
use server; |
| 12 |
use format; |
| 13 |
use ip; |
| 14 |
use ping; |
| 15 |
|
| 16 |
our $debug = $server::debug; |
| 17 |
|
| 18 |
sub mkbasedir { |
| 19 |
my $path = shift; |
| 20 |
$path =~ s{(^.*)/[^/]+$}{$1}; |
| 21 |
mkdir $path unless -d $path; |
| 22 |
return $path; |
| 23 |
} |
| 24 |
|
| 25 |
sub mac_path { $server::conf . '/mac/' . $_[0] } |
| 26 |
sub ip_path { $server::conf . '/ip/' . join('/', @_) } |
| 27 |
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 |
warn "W: $path not file or symlink\n"; |
| 37 |
} |
| 38 |
return $value; |
| 39 |
} |
| 40 |
|
| 41 |
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 |
my $path = ip_path $ip; |
| 52 |
mkdir $path unless -d $path; |
| 53 |
$path .= '/' . $name; |
| 54 |
|
| 55 |
if ( defined $value ) { |
| 56 |
mkbasedir $path; |
| 57 |
write_file $path, $value; |
| 58 |
warn "update $path = $value"; |
| 59 |
} elsif ( ! -e $path && defined $default ) { |
| 60 |
mkbasedir $path; |
| 61 |
write_file $path, $default; |
| 62 |
warn "default $path = $default"; |
| 63 |
$value = $default; |
| 64 |
} elsif ( -f $path ) { |
| 65 |
$value = read_file $path; |
| 66 |
} else { |
| 67 |
warn "# $name missing $path\n" if $debug; |
| 68 |
} |
| 69 |
return $value; |
| 70 |
} |
| 71 |
|
| 72 |
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 $conf; |
| 82 |
} |
| 83 |
sub next_ip($) { |
| 84 |
my $mac = shift; |
| 85 |
$mac = format::mac($mac); |
| 86 |
|
| 87 |
if ( $server::new_clients-- ) { |
| 88 |
warn "# clients left: $server::new_clients\n"; |
| 89 |
} else { |
| 90 |
warn "W: no new clients accepted"; |
| 91 |
return '0.0.0.0'; |
| 92 |
} |
| 93 |
|
| 94 |
my $prefix = $server::ip; |
| 95 |
$prefix =~ s{\.\d+$}{.}; |
| 96 |
my $addr = $server::ip_from || die; |
| 97 |
my $ip = $prefix . $addr; |
| 98 |
|
| 99 |
while ( -e ip_path($ip) || ping::host($ip) ) { |
| 100 |
$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 |
|
| 107 |
save_ip_mac( $ip, $mac ); |
| 108 |
|
| 109 |
return $ip; |
| 110 |
} |
| 111 |
|
| 112 |
sub save_ip_mac { |
| 113 |
my ($ip,$mac) = @_; |
| 114 |
$mac = format::mac($mac); |
| 115 |
return if $mac eq '00:00:00:00:00:00'; |
| 116 |
|
| 117 |
mkdir ip_path($ip) unless -e ip_path($ip); |
| 118 |
|
| 119 |
my $mac_path = mac_path($mac); |
| 120 |
unlink $mac_path if -l $mac_path; # XXX audit? |
| 121 |
symlink ip_path($ip), $mac_path; |
| 122 |
write_file( ip_path($ip,'mac'), $mac ); |
| 123 |
} |
| 124 |
|
| 125 |
sub ip_from_mac($) { |
| 126 |
my $mac = shift; |
| 127 |
$mac = format::mac($mac); |
| 128 |
|
| 129 |
my $mac_path = mac_path $mac; |
| 130 |
return unless -e $mac_path; |
| 131 |
|
| 132 |
my $ip; |
| 133 |
|
| 134 |
if ( -f $mac_path ) { |
| 135 |
$ip = read_file $mac_path; |
| 136 |
unlink $mac_path; |
| 137 |
symlink ip_path($ip), $mac_path; |
| 138 |
warn "I: upgrade to mac symlink $mac_path\n"; |
| 139 |
} elsif ( -l $mac_path ) { |
| 140 |
$ip = conf_value $mac_path; |
| 141 |
} else { |
| 142 |
die "$mac_path not file or symlink"; |
| 143 |
} |
| 144 |
|
| 145 |
return $ip; |
| 146 |
} |
| 147 |
|
| 148 |
sub mac_from_ip($) { |
| 149 |
my $ip = shift; |
| 150 |
conf_value ip_path($ip, 'mac'); |
| 151 |
} |
| 152 |
|
| 153 |
sub change_ip($$) { |
| 154 |
my ($old, $new) = @_; |
| 155 |
return if $old eq $new; |
| 156 |
my $mac = mac_from_ip($old) || die "no mac for $old"; |
| 157 |
rename ip_path($old), ip_path($new); |
| 158 |
unlink mac_path($mac); |
| 159 |
symlink ip_path($new), mac_path($mac); |
| 160 |
return $new; |
| 161 |
} |
| 162 |
|
| 163 |
sub all_ips { |
| 164 |
sort { ip::to_int($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 |
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/$mac"; |
| 177 |
} |
| 178 |
rmtree "$server::conf/ip/$ip"; |
| 179 |
} |
| 180 |
|
| 181 |
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 |
1; |
Parent Directory
| 
Revision Log