PAL.C.T MINI SHELL
#!/usr/bin/perl
# list_leases.cgi
# List all active leases
require './dhcpd-lib.pl';
use Time::Local;
&ReadParse();
$timenow = time();
%access = &get_module_acl();
&error_setup($text{'eacl_aviol'});
&error("$text{'eacl_np'} $text{'eacl_psl'}") unless $access{'r_leases'};
if ($in{'network'}) {
$desc = &text('listl_network', "<tt>$in{'network'}</tt>",
"<tt>$in{'netmask'}</tt>");
}
print "Refresh: $config{'lease_refresh'}\r\n"
if ($config{'lease_refresh'});
&ui_print_header($desc, $text{'listl_header'}, "");
# Work out how many IPs we have in our subnet ranges
%ranges = ( );
$conf = &get_config();
@subnets = &find("subnet", $conf);
@shareds = &find("shared-network", $conf);
foreach $shared (@shareds) {
push(@subnets, &find("subnet", $shared->{'members'}));
@ranges = &find("range", $shared->{'members'});
foreach $pool (&find("pool", $shared->{'members'})) {
push(@ranges, &find("range", $pool->{'members'}));
}
foreach $range (@ranges) {
local @rv = @{$range->{'values'}};
shift(@rv) if ($rv[0] eq "dynamic-bootp");
foreach $ip (&expand_ip_range($rv[0], $rv[1])) {
$ranges{$ip} = $shared;
$shared->{'ips'}++;
}
}
}
foreach $subnet (@subnets) {
if ($in{'network'}) {
# Only count ranges in specified subnet
if ($subnet->{'values'}->[0] ne $in{'network'}) {
next;
}
}
$subnet->{'ips'} = 0;
local @nw = split(/\./, $subnet->{'values'}->[0]);
local @nm = split(/\./, $subnet->{'values'}->[2]);
@ranges = &find("range", $subnet->{'members'});
foreach $pool (&find("pool", $subnet->{'members'})) {
push(@ranges, &find("range", $pool->{'members'}));
}
foreach $range (@ranges) {
local @rv = @{$range->{'values'}};
shift(@rv) if ($rv[0] eq "dynamic-bootp");
foreach $ip (&expand_ip_range($rv[0], $rv[1])) {
if (&within_network($ip)) {
$ranges{$ip} = $subnet;
}
$subnet->{'ips'}++;
}
}
}
if (!-r $config{'lease_file'}) {
# No leases file
print "<b>".&text('listl_lfnotexist',$config{'lease_file'})."</b><p>\n";
}
elsif (!&tokenize_file($config{'lease_file'}, \@tok)) {
# Leases file is not valid or empty
print "<b>",&text('listl_lfnotcont',$config{'lease_file'}),"</b><p>\n";
}
else {
# Parse lease file
$i = $j = 0;
local @nw = split(/\./, $in{'network'});
local @nm = split(/\./, $in{'netmask'});
LEASE: while($i < @tok) {
$lease = &parse_struct(\@tok, \$i, $j++, $config{'lease_file'});
next if (!$lease || $lease->{'name'} ne 'lease');
local $mems = $lease->{'members'};
local $starts = &find('starts', $mems);
local $ends = &find('ends', $mems);
$lease->{'stime'} = &lease_time($starts);
$lease->{'etime'} = &lease_time($ends);
if ($lease->{'etime'} < $timenow ||
$lease->{'stime'} > $timenow) {
if ($in{'all'}) { $lease->{'expired'}++; }
else { next; }
}
next if (!&within_network($lease->{'values'}->[0]));
push(@leases, $lease);
}
# Find leases which have been obsoleted by a more recent one, even if
# they are still valid
my %already;
foreach my $l (reverse(@leases)) {
my $client = &find('client-hostname', $l->{'members'});
my $ch = $client ? $client->{'values'}->[0] : undef;
if ($already{$l->{'values'}->[0],$ch}++) {
$l->{'obsolete'} = 1;
}
}
if (!$in{'all'}) {
@leases = grep { !$_->{'obsolete'} } @leases;
}
# Show links to select mode, if not showing a single subnet
if (!$in{'network'}) {
@links = ( );
foreach $m (0, 1) {
$msg = $text{'listl_mode_'.$m};
if ($m != $in{'bysubnet'}) {
$msg = &ui_link("list_leases.cgi?bysubnet=$m",$msg);
}
push(@links, $msg);
}
print "<b>$text{'listl_mode'}</b> ",
&ui_links_row(\@links),"<br>\n";
}
if ($in{'bysubnet'}) {
# Show table of subnets and shared nets, with lease usage
print &ui_columns_start([
$text{'index_net'}, $text{'index_desc'},
$text{'listl_size'}, $text{'listl_used'},
$text{'listl_pc'} ], 100);
foreach $subnet (@subnets) {
%used = ( );
foreach $lease (@leases) {
$r = $ranges{$lease->{'values'}->[0]};
if ($r eq $subnet && !$lease->{'expired'}) {
$used{$lease->{'values'}->[0]}++;
}
}
$used = scalar(keys %used);
print &ui_columns_row([
$subnet->{'values'}->[0],
&html_escape($subnet->{'comment'}),
$subnet->{'ips'},
$used,
$subnet->{'ips'} ?
int(100*$used / $subnet->{'ips'})."%" :
"",
]);
}
foreach $shared (grep { $_->{'ips'} } @shareds) {
%used = ( );
foreach $lease (@leases) {
$r = $ranges{$lease->{'values'}->[0]};
if ($r eq $shared && !$lease->{'expired'}) {
$used{$lease->{'values'}->[0]}++;
}
}
$used = scalar(keys %used);
print &ui_columns_row([
$shared->{'values'}->[0],
&html_escape($shared->{'comment'}),
$shared->{'ips'},
$used,
$shared->{'ips'} ?
int(100*$used / $shared->{'ips'})."%" :
"",
]);
}
print &ui_columns_end();
}
elsif (@leases) {
# Sort leases by selected type
if ($in{'sort'} eq 'ipaddr') {
@leases = sort { &ip_compare($a, $b) } @leases;
}
elsif ($in{'sort'} eq 'ether') {
@leases = sort { ðer_compare($a, $b) } @leases;
}
elsif ($in{'sort'} eq 'host') {
@leases = sort { &hostname_compare($a, $b) } @leases;
}
elsif ($in{'sort'} eq 'start') {
@leases = sort { $a->{'stime'} <=> $b->{'stime'} }
@leases;
}
elsif ($in{'sort'} eq 'end') {
@leases = sort { $a->{'etime'} <=> $b->{'etime'} }
@leases;
}
elsif ($config{'lease_sort'} == 1) {
@leases = sort { &ip_compare($a, $b) } @leases;
}
elsif ($config{'lease_sort'} == 2) {
@leases = sort { &hostname_compare($a, $b) } @leases;
}
# Show available and used
$leased = 0;
foreach $lease (@leases) {
$ip = $lease->{'values'}->[0];
if ($ranges{$ip} && !$donelease{$ip}++ &&
!$lease->{'expired'}) {
$leased++;
}
}
if (keys %ranges) {
print &text('listl_allocs',
scalar(keys %ranges), $leased,
int($leased*100/scalar(keys %ranges))),"<p>\n";
}
# Table header, with sorting
@tds = ( "width=5" );
print &ui_form_start("delete_leases.cgi", "post");
print &ui_hidden("all", $in{'all'});
print &ui_hidden("network", $in{'network'});
print &ui_hidden("netmask", $in{'netmask'});
@links = ( &select_all_link("d"), &select_invert_link("d") );
$links = "<table width=100%><tr><td>".
&ui_links_row(\@links).
"</td><td align=right>".
&ui_links_row([ &ui_link("list_leases.cgi?$in",$text{'listl_refresh'}) ]).
"</td></tr></table>\n";
print $links;
print &ui_columns_start([
"",
&sort_link("ipaddr"),
&sort_link("ether"),
$config{'lease_vendor'} ? ( &sort_link("vendor") ) : (),
&sort_link("host"),
&sort_link("start"),
&sort_link("end"),
], 100, 0, \@tds);
foreach $lease (@leases) {
local @cols;
local $mems = $lease->{'members'};
local $starts = &find('starts', $mems);
local $ends = &find('ends', $mems);
local $ht = $lease->{'expired'} ||
$lease->{'obsolete'} ? "i" : "tt";
push(@cols, "<$ht>$lease->{'values'}->[0]</$ht>");
local $hard = &find('hardware', $mems);
push(@cols,$hard->{'values'}->[1] ?
"<tt>$hard->{'values'}->[1]</tt>" :
"<i>$text{'listl_unknown'}</i>");
if ($config{'lease_vendor'}) {
my $v = &lookup_mac_vendor(
$hard->{'values'}->[1]);
push(@cols, &html_escape($v));
}
local $client = &find('client-hostname', $mems);
push(@cols, $client ? "<tt>".&html_escape(
$client->{'values'}->[0])."</tt>"
: undef);
if ($config{'lease_tz'} ||
$starts->{'values'}->[0] eq 'epoch') {
$s = &make_date($lease->{'stime'});
$e = &make_date($lease->{'etime'});
}
else {
$s = $starts->{'values'}->[1]." ".
$starts->{'values'}->[2];
$e = $ends->{'values'}->[1]." ".
$ends->{'values'}->[2];
}
push(@cols, "<tt>$s</tt>");
push(@cols, "<tt>$e</tt>");
print &ui_checked_columns_row(\@cols, \@tds, "d",
$lease->{'index'});
}
print &ui_columns_end();
print $links;
print &ui_form_end([ [ undef, $text{'listl_delete'} ] ]);
}
else {
print "<b>",&text($in{'all'} ? 'listl_lfnotcont' :
'listl_lfnotcont2', $config{'lease_file'}),
"</b><p>\n";
}
if (!$in{'all'} && !$in{'bysubnet'}) {
print &ui_form_start("list_leases.cgi");
print &ui_hidden("all", 1);
print &ui_hidden("network", $in{'network'});
print &ui_hidden("netmask", $in{'netmask'});
print &ui_form_end([ [ undef, $text{'listl_all'} ] ]);
}
}
&ui_print_footer("", $text{'listl_return'});
sub lease_time
{
local ($l) = @_;
if ($l->{'values'}->[0] eq 'epoch') {
return $l->{'values'}->[1];
}
else {
local @d = split(/\//, $l->{'values'}->[1]);
local @t = split(/:/, $l->{'values'}->[2]);
local $t;
eval { $t = timegm($t[2], $t[1], $t[0], $d[2], $d[1]-1, $d[0]-1900) };
return $@ ? undef : $t;
}
}
sub ip_compare
{
$a->{'values'}->[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)/;
local ($a1, $a2, $a3, $a4) = ($1, $2, $3, $4);
$b->{'values'}->[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)/;
return $a1 < $1 ? -1 :
$a1 > $1 ? 1 :
$a2 < $2 ? -1 :
$a2 > $2 ? 1 :
$a3 < $3 ? -1 :
$a3 > $3 ? 1 :
$a4 < $4 ? -1 :
$a4 > $4 ? 1 : 0;
}
sub hostname_compare
{
local $client_a = &find_value('client-hostname', $a->{'members'});
local $client_b = &find_value('client-hostname', $b->{'members'});
return lc($client_a) cmp lc($client_b);
}
sub ether_compare
{
local $ether_a = &find('hardware', $a->{'members'});
local $ether_b = &find('hardware', $b->{'members'});
return lc($ether_a->{'values'}->[1]) cmp lc($ether_b->{'values'}->[1]);
}
sub sort_link
{
local ($c) = @_;
if ($in{'sort'} eq $c) {
return $text{'listl_'.$c};
}
else {
return &ui_link("list_leases.cgi?all=$in{'all'}&network=$in{'network'}&netmask=$in{'netmask'}&sort=$c",$text{'listl_'.$c});
}
}
sub within_network
{
local ($ip) = @_;
if ($in{'network'}) {
# Is lease within network/netmask?
local @ad = split(/\./, $ip);
for($k=0; $k<4; $k++) {
if ((int($ad[$k]) & int($nm[$k])) != int($nw[$k])) {
return 0;
}
}
}
return 1;
}
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