From: Mark Andrews <marka@isc.org>
Date: Tue, 24 Nov 2020 13:12:00 +0000 (+1100)
Subject: Add comment about cookie sizes
X-Git-Tag: v9.17.8~20^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=304df539919beb5da6d33d8690b5e588476308d8;p=thirdparty%2Fbind9.git

Add comment about cookie sizes
---

diff --git a/lib/dns/rdata/generic/opt_41.c b/lib/dns/rdata/generic/opt_41.c
index e3a83018e5f..7dbb3703867 100644
--- a/lib/dns/rdata/generic/opt_41.c
+++ b/lib/dns/rdata/generic/opt_41.c
@@ -197,6 +197,10 @@ fromwire_opt(ARGS_FROMWIRE) {
 			isc_region_consume(&sregion, length);
 			break;
 		case DNS_OPT_COOKIE:
+			/*
+			 * Client cookie alone has length 8.
+			 * Client + server cookie is 8 + [8..32].
+			 */
 			if (length != 8 && (length < 16 || length > 40)) {
 				return (DNS_R_OPTERR);
 			}