From 927121fa9afe047009a2502491d1c7000871b45c Mon Sep 17 00:00:00 2001
From: Michael Orlitzky <michael@orlitzky.com>
Date: Wed, 25 Oct 2023 19:28:50 -0400
Subject: [PATCH] dnscache.8,tinydns.8: document TRUNCATELEN hack for microtiks

---
 dnscache.8 | 9 +++++++++
 tinydns.8  | 9 +++++++++
 2 files changed, 18 insertions(+)

diff --git a/dnscache.8 b/dnscache.8
index 54fd357..38dab27 100644
--- a/man/dnscache.8
+++ b/man/dnscache.8
@@ -116,6 +116,15 @@ for other caches, not root servers.
 It forwards queries to those caches the same way that a client does,
 rather than contacting a chain of servers according to NS records.
 
+.B dnscache
+will use the value of
+.I $TRUNCATELEN
+as the cut-off for a UDP response. The standard value according to the
+RFC is 512 (bytes), but
+.I $TRUNCATELEN
+can be anywhere between 512 and 16384. This may be necessary to work
+around implementation bugs.
+
 .SH Memory use
 
 .B dnscache
diff --git a/tinydns.8 b/tinydns.8
index ff92edd..bc991dd 100644
--- a/man/tinydns.8
+++ b/man/tinydns.8
@@ -47,6 +47,15 @@ as specified by
 a binary file created by
 .BR tinydns-data (8).
 
+.B tinydns
+will use the value of
+.I $TRUNCATELEN
+as the cut-off for a UDP response. The standard value according to the
+RFC is 512 (bytes), but
+.I $TRUNCATELEN
+can be anywhere between 512 and 16384. This may be necessary to work
+around implementation bugs.
+
 .SH Further details
 
 .B tinydns
-- 
2.41.0