commit af6e07dad78dd6367e81d5a4fec7056f1af3e806
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Mon Aug 15 11:25:55 2022 +0200

    non-linux: bits/in.h: Add more RFC options

diff --git a/bits/in.h b/bits/in.h
index 076cce08aa..ad898cce89 100644
--- a/bits/in.h
+++ b/bits/in.h
@@ -104,6 +104,16 @@ struct ip_opts
 #define IPV6_PATHMTU		61
 #define IPV6_DONTFRAG		62
 
+/* Advanced API (RFC3542) (2).  */
+#define IPV6_RECVTCLASS		66
+#define IPV6_TCLASS		67
+
+/* RFC5014.  */
+#define IPV6_ADDR_PREFERENCES	72
+
+/* RFC5082.  */
+#define IPV6_MINHOPCOUNT	73
+
 /* Obsolete synonyms for the above.  */
 #define IPV6_ADD_MEMBERSHIP	IPV6_JOIN_GROUP
 #define IPV6_DROP_MEMBERSHIP	IPV6_LEAVE_GROUP