From: Ben Pfaff <blp@nicira.com>
Date: Mon, 6 Oct 2008 16:37:42 +0000 (-0700)
Subject: Random Ethernet addresses should be private and should not be multicast.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=82b05cb81e54503bc725df3a6eab06858c3db0be;p=openvswitch

Random Ethernet addresses should be private and should not be multicast.
---

diff --git a/include/packets.h b/include/packets.h
index e7681ad4..bad36712 100644
--- a/include/packets.h
+++ b/include/packets.h
@@ -86,6 +86,8 @@ static inline void eth_addr_from_uint64(uint64_t x, uint8_t ea[ETH_ADDR_LEN])
 static inline void eth_addr_random(uint8_t ea[ETH_ADDR_LEN])
 {
     random_bytes(ea, ETH_ADDR_LEN);
+    ea[0] &= ~1;                /* Unicast. */
+    ea[0] |= 2;                 /* Private. */
 }
 
 #define ETH_ADDR_FMT                                                    \