* Trac #3317

  Rewrite of trigger_wake function.
  WOL-Packets are sent as ip-directed-broadcats instead of normal broadcasts (255.255.255.255).

git-svn-id: https://oss.gonicus.de/repositories/gosa/branches/2.6-lhm@14505 594d385d-05f5-0310-b6e9-bd551577e9d8

diff --git a/trunk/gosa-si/server/events/server_server_com.pm b/trunk/gosa-si/server/events/server_server_com.pm
index 7394fab13e02fd86675fae25ef269ac93f2c362f..cd80ebed7ebed55cd4621cc60fa19d91ab43e292 100644 (file)
--- a/trunk/gosa-si/server/events/server_server_com.pm
+++ b/trunk/gosa-si/server/events/server_server_com.pm
@@ -347,49 +347,80 @@ sub new_foreign_client {
 
 sub trigger_wake {
     my ($msg, $msg_hash, $session_id) = @_ ;
 
 sub trigger_wake {
     my ($msg, $msg_hash, $session_id) = @_ ;

-
-    foreach (@{$msg_hash->{'macaddress'}}){
-        &main::daemon_log("$session_id INFO: trigger wake for $_", 5);
-        my $host    = $_;
-        my $ipaddr  = '255.255.255.255';
-        my $port    = getservbyname('discard', 'udp');
-       if (not defined $port) {
-               &main::daemon_log("$session_id ERROR: cannot determine port for wol $_: 'getservbyname('discard', 'udp')' failed!",1);
-               next;
-       }
-
-        my ($raddr, $them, $proto);
-        my ($hwaddr, $hwaddr_re, $pkt);
-
-        # get the hardware address (ethernet address)
-        $hwaddr_re = join(':', ('[0-9A-Fa-f]{1,2}') x 6);
-        if ($host =~ m/^$hwaddr_re$/) {
-          $hwaddr = $host;
-        } else {
-          &main::daemon_log("$session_id ERROR: trigger_wake called with non mac address", 1);
-        }
-
-        # Generate magic sequence
-        foreach (split /:/, $hwaddr) {
-                $pkt .= chr(hex($_));
-        }
-        $pkt = chr(0xFF) x 6 . $pkt x 16 . $main::wake_on_lan_passwd;
-
-        # Allocate socket and send packet
-
-        $raddr = gethostbyname($ipaddr);
-       if (not defined $raddr) {
-               &main::daemon_log("$session_id ERROR: cannot determine raddr for wol $_: 'gethostbyname($ipaddr)' failed!", 1);
-               next;
-       }
-
-        $them = pack_sockaddr_in($port, $raddr);
-        $proto = getprotobyname('udp');
-
-        socket(S, AF_INET, SOCK_DGRAM, $proto) or die "socket : $!";
-        setsockopt(S, SOL_SOCKET, SO_BROADCAST, 1) or die "setsockopt : $!";
-        send(S, $pkt, 0, $them) or die "send : $!";
-        close S;
+       my $hwaddr_re = join(':', ('[0-9A-Fa-f]{1,2}') x 6);
+    foreach my $mac (@{$msg_hash->{'macaddress'}}){
+               # Check the ethernet-hw-address
+               my $hwaddr;
+               if ($mac =~ m/^$hwaddr_re$/) {
+                       $hwaddr = $mac;
+               } 
+               else {
+                       &main::daemon_log("$session_id ERROR: trigger_wake called with non mac address", 1);
+                       next;
+               }
+               my $ldap_handle = &main::get_ldap_handle(); # Use existing ldaphandle
+               my $msg;
+               my $a = my $b = my $c = my $d = 255; # IP-Address, Fallbackvalue is 255.255.255.255
+               my @subnets = ("0", "240", "255"); # List of possible subnets. Front part is always 255.255.255.
+               my @broadcasts; # List of used broadcasts
+               my $port = 40000; # Port to use for sending packets
+               if(defined($ldap_handle)) {
+                       # Ldapsearch
+                       $msg = $ldap_handle->search( 
+                       base   => $main::ldap_base,
+                       filter => "(&(macAddress=$mac)(|(objectClass=gotoWorkstation)(objectClass=goServer)))",
+                       attrs => "cn, ipHostNumber"
+                       ) or &main::daemon_log("cannot perform search at ldap: $@", 1);
+               }
+               # Extract the cn which is the hostname
+               if(defined($msg) && $msg->count==1){
+                       # use cn from ldapsearch to get the rigth ip-address
+                       my @entries = $msg->entries;
+                       # get the ip which belong to this hostname
+                       ($a,$b,$c,$d)=unpack('C4', gethostbyname($entries[0]->get_value('cn')));
+                       # Calculate the correct broadcast-addresses
+                       foreach my $subnet (@subnets){
+                               # to get the broadcastaddress we set all host bits in the 4th-ip-address-part to 1
+                               # Some bit-operations:
+                               # get subnetpart: 4th-ip-address-part AND subnet-mask
+                               # get hostpart and set bits to 1: 255 XOR subnet-mask (255=11111111)
+                               # get broadcast: (subnetpart) + (hostpart-bits set to 1)
+                               # 
+                               push(@broadcasts,($d & $subnet) + (255 ^ $subnet));
+               }
+               }
+               else{
+                       # No entry found for this MAC or there exists more than one entry. Anyway switch to fallback. 
+                       &main::daemon_log("INFO: switched to fallback-WOL-mode", 1);
+                       # As fallback set broadcast only to 255. The fallback IP will be 255.255.255.255
+                       @broadcasts = ("255");
+               }
+               # Send a wol-packet for each broadcast-address
+               foreach my $broadcast (@broadcasts){
+                       my $ipaddr  = "$a.$b.$c.$broadcast";
+                       &main::daemon_log("INFO: trigger wake for $mac with broadcast $ipaddr", 1);
+                       my ($raddr, $them, $proto, $pkt);
+                       # Generate magic sequence
+                       foreach (split /:/, $hwaddr) {
+                                       $pkt .= chr(hex($_));
+                       }
+                       $pkt = chr(0xFF) x 6 . $pkt x 16 . $main::wake_on_lan_passwd;
+       
+                       # Allocate socket and send packet
+                       $raddr = gethostbyname($ipaddr);
+                       if (not defined $raddr) {
+                               &main::daemon_log("$session_id ERROR: cannot determine raddr for wol $_: 'gethostbyname($ipaddr)' failed!", 1);
+                               next;
+                       }
+       
+                       $them = pack_sockaddr_in($port, $raddr);
+                       $proto = getprotobyname('udp');
+       
+                       socket(S, AF_INET, SOCK_DGRAM, $proto) or die "socket : $!";
+                       setsockopt(S, SOL_SOCKET, SO_BROADCAST, 1) or die "setsockopt : $!";
+                       send(S, $pkt, 0, $them) or die "send : $!";
+                       close S;
+               }

     }
 
     return;
     }
 
     return;