From edded7546e392079d824e62e6843a62f17927ef7 Mon Sep 17 00:00:00 2001
From: Michael Brown
Date: Sun, 8 Jul 2007 14:33:53 +0100
Subject: Limit xmit window to one MTU.  (Path MTU discovery not yet
 implemented; should be done at some point.)

---
 src/include/gpxe/tcp.h | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'src/include')

diff --git a/src/include/gpxe/tcp.h b/src/include/gpxe/tcp.h
index ba9ae0e8a..9bf48cfae 100644
--- a/src/include/gpxe/tcp.h
+++ b/src/include/gpxe/tcp.h
@@ -237,6 +237,14 @@ struct tcp_mss_option {
  */
 #define TCP_MAX_WINDOW_SIZE	( 65536 - 4 )
 
+/**
+ * Path MTU
+ *
+ * We really ought to implement Path MTU discovery.  Until we do,
+ * anything with a path MTU greater than this may fail.
+ */
+#define TCP_PATH_MTU 1460
+
 /**
  * Advertised TCP MSS
  *
-- 
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