Added a comment.

diff --git a/lib/cookies/helper.c b/lib/cookies/helper.c
index 86bd2871b83a698ec08fac776d6ee70573c0d039..adb27d6ff308c8f437b9fe8e176cdc692467f47d 100644 (file)
--- a/lib/cookies/helper.c
+++ b/lib/cookies/helper.c
@@ -185,6 +185,10 @@ int kr_answer_write_cookie(const struct knot_sc_private *srvr_data,
        uint16_t nonce_len = KR_NONCE_LEN;
        uint16_t hash_len = alg->hash_size;
 
+       /*
+        * Space for cookie is reserved inside the EDNS OPT RR inside
+        * the answer packet.
+        */
        uint8_t *cookie = NULL;
        uint16_t cookie_len = knot_edns_opt_cookie_data_len(cc_len,
                                                            nonce_len + hash_len);