Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / net / net_rand.h

diff --git a/qemu/roms/u-boot/net/net_rand.h b/qemu/roms/u-boot/net/net_rand.h
new file mode 100644 (file)
index 0000000..ba9d064
--- /dev/null
+++ b/qemu/roms/u-boot/net/net_rand.h
@@ -0,0 +1,43 @@
+/*
+ *     Copied from LiMon - BOOTP.
+ *
+ *     Copyright 1994, 1995, 2000 Neil Russell.
+ *     (See License)
+ *     Copyright 2000 Paolo Scaffardi
+ */
+
+#ifndef __NET_RAND_H__
+#define __NET_RAND_H__
+
+#include <common.h>
+
+/*
+ * Return a seed for the PRNG derived from the eth0 MAC address.
+ */
+static inline unsigned int seed_mac(void)
+{
+       unsigned char enetaddr[6];
+       unsigned int seed;
+
+       /* get our mac */
+       eth_getenv_enetaddr("ethaddr", enetaddr);
+
+       seed = enetaddr[5];
+       seed ^= enetaddr[4] << 8;
+       seed ^= enetaddr[3] << 16;
+       seed ^= enetaddr[2] << 24;
+       seed ^= enetaddr[1];
+       seed ^= enetaddr[0] << 8;
+
+       return seed;
+}
+
+/*
+ * Seed the random number generator using the eth0 MAC address.
+ */
+static inline void srand_mac(void)
+{
+       srand(seed_mac());
+}
+
+#endif /* __NET_RAND_H__ */