From 094499a2f22de47a126106368debef0730359672 Mon Sep 17 00:00:00 2001
From: Dirk Koopman <djk@tobit.co.uk>
Date: Tue, 26 May 2020 22:51:26 +0100
Subject: [PATCH 1/1] add_thingy patch backport from mojo

---
 perl/DXProtHandle.pm | 48 ++++++++++++++++++++++++++------------------
 1 file changed, 28 insertions(+), 20 deletions(-)

diff --git a/perl/DXProtHandle.pm b/perl/DXProtHandle.pm
index e642bb3c..b3a7cfcd 100644
--- a/perl/DXProtHandle.pm
+++ b/perl/DXProtHandle.pm
@@ -1420,32 +1420,40 @@ sub _add_thingy
 	my ($call, $is_node, $is_extnode, $here, $version, $build, $ip) = @$s;
 	my @rout;
 
+	# remove spurious IPV6 prefix on IPV4 addresses
+	$ip =~ s/^::ffff:// if $ip;
+	
 	if ($call) {
 		my $ncall = $parent->call;
-		if ($is_node) {
-			dbg("ROUTE: added node $call to $ncall") if isdbg('routelow');
-			@rout = $parent->add($call, $version, Route::here($here), $ip);
-			my $r = Route::Node::get($call);
-			$r->PC92C_dxchan($dxchan->call, $hops) if $r;
-			if ($ip) {
-				$r->ip($ip);
-				Log('DXProt', "PC92A $call -> $ip on $ncall");
+		if ($ncall ne $call) {
+			if ($is_node) {
+				dbg("ROUTE: added node $call to $ncall") if isdbg('routelow');
+				@rout = $parent->add($call, $version, Route::here($here), $ip);
+				my $r = Route::Node::get($call);
+				$r->PC92C_dxchan($dxchan->call, $hops) if $r;
+				if ($ip) {
+					$r->ip($ip);
+					Log('DXProt', "PC92A $call -> $ip on $ncall");
+				}
+			} else {
+				dbg("ROUTE: added user $call to $ncall") if isdbg('routelow');
+				@rout = $parent->add_user($call, Route::here($here), $ip);
+				$dxchan->tell_buddies('loginb', $call, $ncall) if $dxchan;
+				my $r = Route::User::get($call);
+				if ($ip) {
+					$r->ip($ip);
+					Log('DXProt', "PC92A $call -> $ip on $ncall");
+				}
 			}
-		} else {
-			dbg("ROUTE: added user $call to $ncall") if isdbg('routelow');
-			@rout = $parent->add_user($call, Route::here($here), $ip);
-			$dxchan->tell_buddies('loginb', $call, $ncall) if $dxchan;
-			my $r = Route::User::get($call);
-			if ($ip) {
-				$r->ip($ip);
-				Log('DXProt', "PC92A $call -> $ip on $ncall");
+			if ($pc92_slug_changes && $parent == $main::routeroot) {
+				$things_add{$call} = Route::get($call);
+				delete $things_del{$call};
 			}
-		}
-		if ($pc92_slug_changes && $parent == $main::routeroot) {
-			$things_add{$call} = Route::get($call);
-			delete $things_del{$call};
+		} else {
+			dbg("DXProt::add_thingy: Trying to add parent $call to itself $ncall, ignored");
 		}
 	}
+	
 	return @rout;
 }
 
-- 
2.43.0