From 4653974c2a8ca87c18ec9a33dde6b6b4212057b9 Mon Sep 17 00:00:00 2001
From: fbernon <fbernon>
Date: Wed, 12 Dec 2007 19:22:20 +0000
Subject: [PATCH] Minor change: move DNS_MSG_SIZE in opt.h, add comments.

---
 src/core/dns.c         | 3 ---
 src/include/lwip/opt.h | 8 +++++++-
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/core/dns.c b/src/core/dns.c
index 03bbe658..908f3878 100644
--- a/src/core/dns.c
+++ b/src/core/dns.c
@@ -102,9 +102,6 @@
 #define DNS_MAX_TTL               604800
 #endif
 
-/** DNS message max. size */
-#define DNS_MSG_SIZE              512
-
 /* DNS protocol flags */
 #define DNS_FLAG1_RESPONSE        0x80
 #define DNS_FLAG1_OPCODE_STATUS   0x10
diff --git a/src/include/lwip/opt.h b/src/include/lwip/opt.h
index 3f49b3b0..539358ba 100644
--- a/src/include/lwip/opt.h
+++ b/src/include/lwip/opt.h
@@ -580,11 +580,17 @@
 #endif
 
 /** DNS use a local buffer if DNS_USES_STATIC_BUF=0, a static one if
-    DNS_USES_STATIC_BUF=1, or a dynamic one if DNS_USES_STATIC_BUF=2. */
+    DNS_USES_STATIC_BUF=1, or a dynamic one if DNS_USES_STATIC_BUF=2.
+    The buffer will be of size DNS_MSG_SIZE */
 #ifndef DNS_USES_STATIC_BUF
 #define DNS_USES_STATIC_BUF             1
 #endif
 
+/** DNS message max. size. Default value is RFC compliant. */
+#ifndef DNS_MSG_SIZE
+#define DNS_MSG_SIZE                    512
+#endif
+
 /*
    ---------------------------------
    ---------- UDP options ----------