From 9b0e404e5fc71a2bd4fba8a66296477f815af7d5 Mon Sep 17 00:00:00 2001
From: Brian Wellington <source@isc.org>
Date: Mon, 8 Jan 2001 20:50:04 +0000
Subject: [PATCH]  666.   [bug]           If a request is longer than 512
 bytes, send it using                         TCP.

---
 CHANGES           | 3 +++
 bin/dig/dighost.c | 8 +++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/CHANGES b/CHANGES
index 67e9561566..88e3d771ff 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+ 666.	[bug]		If a request is longer than 512 bytes, send it using
+			TCP.
+
  665.	[bug]		Signed responses were not sent when the size of the
 			TSIG + question exceeded the maximum message size.
 			[RT #628]
diff --git a/bin/dig/dighost.c b/bin/dig/dighost.c
index 2362897a67..953de5c614 100644
--- a/bin/dig/dighost.c
+++ b/bin/dig/dighost.c
@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: dighost.c,v 1.176 2001/01/08 19:50:32 bwelling Exp $ */
+/* $Id: dighost.c,v 1.177 2001/01/08 20:50:04 bwelling Exp $ */
 
 /*
  * Notice to programmers:  Do not use this code as an example of how to
@@ -1522,6 +1522,12 @@ setup_lookup(dig_lookup_t *lookup) {
 	check_result(result, "dns_message_renderend");
 	debug("done rendering");
 
+	/*
+	 * Force TCP mode if the request is larger than 512 bytes.
+	 */
+	if (isc_buffer_usedlength(&lookup->sendbuf) > 512)
+		lookup->tcp_mode = ISC_TRUE;
+
 	lookup->pending = ISC_FALSE;
 
 	for (serv = ISC_LIST_HEAD(lookup->my_server_list);