Another fix for ye old tyme clients.

2017-09-01 12:03:31 -07:00
parent b1fb020aea
commit 2d858b05ac
3 changed files with 13 additions and 12 deletions
--- a/include/ZeroTierOne.h
+++ b/include/ZeroTierOne.h
@@ -92,6 +92,15 @@ extern "C" {
 */
 #define ZT_MAX_MTU 10000

+/**
+ * Default payload MTU for UDP packets
+ *
+ * This is 1500 - IPv6 UDP overhead - PPPoE overhead and is safe for 99.9% of
+ * all Internet links.
+ */
+#define ZT_DEFAULT_PHYSMTU 1444
+#define ZT_UDP_DEFAULT_PAYLOAD_MTU 1444
+
 /**
 * Maximum physical UDP payload
 */
@@ -103,7 +112,7 @@ extern "C" {
 #define ZT_MAX_HEADROOM 224

 /**
- * Maximum physical MTU
+ * Maximum payload MTU for UDP packets
 */
 #define ZT_MAX_PHYSMTU (ZT_MAX_PHYSPAYLOAD + ZT_MAX_HEADROOM)