PERFORCE change 47054 for review

[Sam Leffler]

http://perforce.freebsd.org/chv.cgi?CH=47054

Change 47054 by sam at sam_ebb on 2004/02/16 14:35:16

	add get_random_bytes to ease portability

Affected files ...

.. //depot/projects/netperf+sockets/sys/net80211/ieee80211_freebsd.c#3 edit

Differences ...

==== //depot/projects/netperf+sockets/sys/net80211/ieee80211_freebsd.c#3 (text+ko) ====

@@ -60,6 +60,28 @@
 	return m;
 }
 
+void
+get_random_bytes(void *data, u_int len)
+{
+	int i = len / sizeof(u_int32_t);
+
+	KASSERT((len % sizeof(u_int32_t)) == 0,
+		("len %u not a multiple of word size", len));
+	if (!ALIGNED_POINTER(data, u_int32_t)) {
+		u_int8_t *bp;
+
+		for (bp = data; --i >= 0; bp += sizeof(u_int32_t)) {
+			u_int32_t v = arc4random();
+			memcpy(bp, &v, sizeof(v));
+		}
+	} else {
+		u_int32_t *dp = data;
+
+		while (--i >= 0)
+			*dp++ = arc4random();
+	}
+}
+
 /*
  * Module glue.
  *