From e6a31789890bbcee59812062190d08b10901dc99 Mon Sep 17 00:00:00 2001
From: dlg <dlg@openbsd.org>
Date: Sun, 21 Feb 2021 02:37:38 +0000
Subject: [PATCH] add stoeplitz_eaddr, for getting a hash value from an
 ethernet address.

---
 sys/net/toeplitz.c | 11 ++++++++++-
 sys/net/toeplitz.h |  7 ++++++-
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/sys/net/toeplitz.c b/sys/net/toeplitz.c
index ab4b19f8d2d..665d334f5d8 100644
--- a/sys/net/toeplitz.c
+++ b/sys/net/toeplitz.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: toeplitz.c,v 1.9 2020/09/01 19:18:26 tb Exp $ */
+/* $OpenBSD: toeplitz.c,v 1.10 2021/02/21 02:37:38 dlg Exp $ */
 
 /*
  * Copyright (c) 2009 The DragonFly Project.  All rights reserved.
@@ -187,6 +187,15 @@ stoeplitz_hash_ip6port(const struct stoeplitz_cache *scache,
 }
 #endif /* INET6 */
 
+uint16_t
+stoeplitz_hash_eaddr(const struct stoeplitz_cache *scache,
+    const uint8_t ea[static 6])
+{
+	const uint16_t *ea16 = (const uint16_t *)ea;
+
+	return (stoeplitz_hash_n16(scache, ea16[0] ^ ea16[1] ^ ea16[2]));
+}
+
 void
 stoeplitz_to_key(void *key, size_t klen)
 {
diff --git a/sys/net/toeplitz.h b/sys/net/toeplitz.h
index ece8bdf1726..a0b469ad482 100644
--- a/sys/net/toeplitz.h
+++ b/sys/net/toeplitz.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: toeplitz.h,v 1.3 2020/06/19 08:48:15 dlg Exp $ */
+/*	$OpenBSD: toeplitz.h,v 1.4 2021/02/21 02:37:38 dlg Exp $ */
 
 /*
  * Copyright (c) 2019 David Gwynne <dlg@openbsd.org>
@@ -53,6 +53,9 @@ uint16_t	stoeplitz_hash_ip6port(const struct stoeplitz_cache *,
 		    uint16_t, uint16_t);
 #endif
 
+uint16_t	stoeplitz_hash_eaddr(const struct stoeplitz_cache *,
+		    const uint8_t [static 6]);
+
 /* hash a uint16_t in network byte order */
 static __unused inline uint16_t
 stoeplitz_hash_n16(const struct stoeplitz_cache *scache, uint16_t n16)
@@ -116,5 +119,7 @@ extern const struct stoeplitz_cache *const stoeplitz_cache;
 #define stoeplitz_ip6port(_sa6, _da6, _sp, _dp) \
 	stoeplitz_hash_ip6port(stoeplitz_cache, (_sa6), (_da6), (_sp), (_dp))
 #endif
+#define stoeplitz_eaddr(_ea) \
+	stoeplitz_hash_eaddr(stoeplitz_cache, (_ea))
 
 #endif /* _SYS_NET_TOEPLITZ_H_ */
-- 
2.20.1