Do not send ENDs. Do not send empty packets.

1 files changed, 2 insertions, 1 deletions

diff --git a/ipif/udptunnel b/ipif/udptunnel
index 7160cca..1b5031c 100755
--- a/ipif/udptunnel
+++ b/ipif/udptunnel
@@ -215,7 +215,7 @@ for (;;) {
 	    quit "tunnel endpoint closed by system";
 	}
 	while (($p= index($upbuf,"\300")) >= 0) {
-	    if (!defined(send L,substr($upbuf,0,$p+1),0,$rs)) {
+	    if ($p && !defined(send L,substr($upbuf,0,$p),0,$rs)) {
 		warning("transmit error: $!");
 	    } else {
 		if (!$upyet) {
@@ -233,6 +233,7 @@ for (;;) {
 	    warning("got packet from incorrect peer $rsp_from");
 	    next;
 	}
+	$downbuf= "\300".$downbuf."\300";
 	if (!defined($r= syswrite(DW,$downbuf,length $downbuf))) {
 	    warning("tunnel endpoint write error: $!");
 	} elsif ($r != length $downbuf) {