--- loncom/lonnet/perl/lonnet.pm	2007/06/25 23:34:34	1.890.2.3
+++ loncom/lonnet/perl/lonnet.pm	2007/06/18 22:49:57	1.891
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.890.2.3 2007/06/25 23:34:34 albertel Exp $
+# $Id: lonnet.pm,v 1.891 2007/06/18 22:49:57 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -214,6 +214,24 @@ sub reply {
 # ----------------------------------------------------------- Send USR1 to lonc
 
 sub reconlonc {
+    my ($lonid) = @_;
+    my $hostname = &hostname($lonid);
+    if ($lonid) {
+	my $peerfile="$perlvar{'lonSockDir'}/$hostname";
+	if ($hostname && -e $peerfile) {
+	    &logthis("Trying to reconnect lonc for $lonid ($hostname)");
+	    my $client=IO::Socket::UNIX->new(Peer    => $peerfile,
+					     Type    => SOCK_STREAM,
+					     Timeout => 10);
+	    if ($client) {
+		print $client ("reset_retries\n");
+		my $answer=<$client>;
+		#reset just this one.
+	    }
+	}
+	return;
+    }
+
     &logthis("Trying to reconnect lonc");
     my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
     if (open(my $fh,"<$loncfile")) {
@@ -1378,7 +1396,7 @@ sub ssi {
     my $request;
 
     $form{'no_update_last_known'}=1;
-    &Apache::lonenc::check_encrypt(\$fn);
+
     if (%form) {
       $request=new HTTP::Request('POST',&absolute_url().$fn);
       $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
@@ -7854,7 +7872,6 @@ sub get_dns {
     sub reset_hosts_info {
 	&reset_domain_info();
 	&reset_hosts_ip_info();
-	undef(%name_to_host);
 	undef(%hostname);
 	undef(%hostdom);
 	undef(%libserv);
@@ -7946,6 +7963,24 @@ sub get_dns {
     my %name_to_ip;
     my %lonid_to_ip;
 
+    my %valid_ip;
+    sub valid_ip {
+	my ($ip) = @_;
+	if (exists($iphost{$ip}) || exists($valid_ip{$ip})) {
+	    return 1;	
+	}
+	my $name = gethostbyip($ip);
+	my $lonid = &hostname($name);
+	if (defined($lonid)) {
+	    $valid_ip{$ip} = $lonid;
+	    return 1;
+	}
+	my %iphosts = &get_iphost();
+	if (ref($iphost{$ip})) {
+	    return 1;	
+	}
+    }
+
     sub get_hosts_from_ip {
 	my ($ip) = @_;
 	my %iphosts = &get_iphost();
@@ -7977,7 +8012,6 @@ sub get_dns {
     
     sub get_iphost {
 	my ($ignore_cache) = @_;
-
 	if (!$ignore_cache) {
 	    if (%iphost) {
 		return %iphost;
@@ -7991,31 +8025,16 @@ sub get_dns {
 		return %iphost;
 	    }
 	}
-
-	# get yesterday's info for fallback
-	my %old_name_to_ip;
-	my ($ip_info,$cached)=
-	    &Apache::lonnet::is_cached_new('iphost','iphost');
-	if ($cached) {
-	    %old_name_to_ip = %{$ip_info->[1]};
-	}
-
 	my %name_to_host = &all_names();
 	foreach my $name (keys(%name_to_host)) {
 	    my $ip;
 	    if (!exists($name_to_ip{$name})) {
 		$ip = gethostbyname($name);
 		if (!$ip || length($ip) ne 4) {
-		    if (defined($old_name_to_ip{$name})) {
-			$ip = $old_name_to_ip{$name};
-			&logthis("Can't find $name defaulting to old $ip");
-		    } else {
-			&logthis("Name $name no IP found");
-			next;
-		    }
-		} else {
-		    $ip=inet_ntoa($ip);
+		    &logthis("Skipping name $name no IP found");
+		    next;
 		}
+		$ip=inet_ntoa($ip);
 		$name_to_ip{$name} = $ip;
 	    } else {
 		$ip = $name_to_ip{$name};
@@ -8027,7 +8046,7 @@ sub get_dns {
 	}
 	&Apache::lonnet::do_cache_new('iphost','iphost',
 				      [\%iphost,\%name_to_ip,\%lonid_to_ip],
-				      48*60*60);
+				      24*60*60);
 
 	return %iphost;
     }