Add ability to remove DHCP leases.

Use "x" icon to delete the lease.
Said icon only appears next to "offline" dynamic leases

1 files changed, 40 insertions, 2 deletions

diff --git a/usr/local/www/diag_dhcp_leases.php b/usr/local/www/diag_dhcp_leases.php
index 78bde63..36ff16c 100755
--- a/usr/local/www/diag_dhcp_leases.php
+++ b/usr/local/www/diag_dhcp_leases.php
@@ -42,6 +42,41 @@
 require("guiconfig.inc");
 
 $pgtitle = array("Status","DHCP leases");
+
+$leasesfile = "{$g['dhcpd_chroot_path']}/var/db/dhcpd.leases";
+
+if (($_GET['deleteip']) && (is_ipaddr($_GET['deleteip']))) {
+	// Stop DHCPD
+	killbyname("dhcpd");
+
+	// Read existing leases
+	$leases_contents = explode("\n", file_get_contents($leasesfile));
+	$newleases_contents = array();
+	$i=0;
+	while ($i < count($leases_contents)) {
+		// Find the lease(s) we want to delete
+		if ($leases_contents[$i] == "lease {$_GET['deleteip']} {") {
+			// Skip to the end of the lease declaration
+			do {
+				$i++;
+			} while ($leases_contents[$i] != "}");
+		} else {
+			// It's a line we want to keep, copy it over.
+			$newleases_contents[] = $leases_contents[$i];
+		}
+		$i++;
+	}
+
+	// Write out the new leases file
+	$fd = fopen($leasesfile, 'w');
+	fwrite($fd, implode("\n", $newleases_contents));
+	fclose($fd);
+
+	// Restart DHCP Service
+	services_dhcpd_configure();
+	header("Location: diag_dhcp_leases.php");
+}
+
 include("head.inc");
 
 ?>
@@ -69,7 +104,6 @@ function remove_duplicate($array, $field)
   return $new;
 }
 
-$leasesfile = "{$g['dhcpd_chroot_path']}/var/db/dhcpd.leases";
 $awk = "/usr/bin/awk";
 /* this pattern sticks comments into a single array item */
 $cleanpattern = "'{ gsub(\"#.*\", \"\");} { gsub(\";\", \"\"); print;}'";
@@ -332,7 +366,11 @@ foreach ($leases as $data) {
                 echo "<td class=\"listr\">{$fspans}{$data['act']}{$fspane}&nbsp;</td>\n";
 		
 		if ($data['type'] == "dynamic") {
-                	echo "<td class=\"list\" valign=\"middle\"><a href=\"services_dhcp_edit.php?if={$data['if']}&mac={$data['mac']}&hostname={$data['hostname']}\">";
+			if ($data['online'] != "online") {
+				echo "<td class=\"list\" valign=\"middle\"><a href=\"diag_dhcp_leases.php?deleteip={$data['ip']}\">";
+				echo "<img src=\"/themes/{$g['theme']}/images/icons/icon_x.gif\" width=\"17\" height=\"17\" border=\"0\" title=\"delete this dhcp lease\"></a></td>\n";
+			}
+			echo "<td valign=\"middle\"><a href=\"services_dhcp_edit.php?if={$data['if']}&mac={$data['mac']}&hostname={$data['hostname']}\">";
 			echo "<img src=\"/themes/{$g['theme']}/images/icons/icon_plus.gif\" width=\"17\" height=\"17\" border=\"0\" title=\"add a static mapping for this MAC address\"></a></td>\n";
 		} else {
                 	echo "<td class=\"list\" valign=\"middle\">";