# HG changeset patch
# User Brett Gordon
# Date 1481646397 18000
# Node ID e4d98cbf95ebf3977354371bcb12cccd99911f0d
# Parent  7702bb8a82161640097d4a74f3a66db33d842c25
packet: add get value semantics

diff -r 7702bb8a8216 -r e4d98cbf95eb src/lwwire-packet.c
--- a/src/lwwire-packet.c	Tue Nov 22 17:27:59 2016 -0500
+++ b/src/lwwire-packet.c	Tue Dec 13 11:26:37 2016 -0500
@@ -155,10 +155,20 @@
 /* set/return receive mtu */
 static int tun_proto_setrxmtu()
 {
+    unsigned int val;
     unsigned char buf[2];
     if (lwwire_read(buf, 2) < 0)
 	return -1;
-    rxmtu = (buf[0]<<8) + buf[1];
+    val = (buf[0] << 8) + buf[1];
+    if (val)
+    {
+	rxmtu = val;
+    }
+    else
+    {
+	buf[0] = rxmtu >> 8;
+	buf[1] = rxmtu & 255;
+    }
     lwwire_write(buf, 2);
     return 0;
 }
@@ -166,21 +176,38 @@
 /* set/return transmit mtu */
 static int tun_proto_settxmtu()
 {
+    unsigned int val;
     unsigned char buf[2];
     if (lwwire_read(buf, 2) < 0)
 	return -1;
-    txmtu = (buf[0]<<8) + buf[1];
+    val = (buf[0] << 8) + buf[1];
+    if (val)
+    {
+	txmtu = val;
+    }
+    else
+    {
+	buf[0] = txmtu >> 8;
+	buf[1] = txmtu & 255;
+    }
     lwwire_write(buf, 2);
     return 0;
 }
 
-/* set/return receive mtu */
+/* set/return queue length */
 static int tun_proto_setqlen()
 {
     unsigned char buf[1];
     if (lwwire_read(buf, 1) < 0)
 	return -1;
-    qlen = buf[0];
+    if (buf[0])
+    {
+	qlen = buf[0];
+    }
+    else
+    {
+	buf[0] = qlen;
+    }
     lwwire_write(buf, 1);
     return 0;
 }