aboutsummaryrefslogtreecommitdiff
path: root/net/net_rand.h
diff options
context:
space:
mode:
authorJoe Hershberger <joe.hershberger@ni.com>2012-05-23 07:57:58 +0000
committerJoe Hershberger <joe.hershberger@ni.com>2012-05-23 14:19:22 -0500
commiteafc8db0e35275330f43a4cf7b7ae8aba71c9728 (patch)
tree0f76700afacfdeab0feafbd787e32d347083a0fd /net/net_rand.h
parent806150063a6b98d7e757bd9f640af1755bb387fd (diff)
downloadu-boot-linaro-stable-eafc8db0e35275330f43a4cf7b7ae8aba71c9728.tar.gz
net: Move MAC-seeded rand out of bootp.c
Make the MAC-seeded random number generator available to /net in general. MAC-seeded rand will be needed by link-local as well, so give it an interface. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'net/net_rand.h')
-rw-r--r--net/net_rand.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/net/net_rand.h b/net/net_rand.h
new file mode 100644
index 000000000..c98db6428
--- /dev/null
+++ b/net/net_rand.h
@@ -0,0 +1,26 @@
+/*
+ * Copied from LiMon - BOOTP.
+ *
+ * Copyright 1994, 1995, 2000 Neil Russell.
+ * (See License)
+ * Copyright 2000 Paolo Scaffardi
+ */
+
+#ifndef __NET_RAND_H__
+#define __NET_RAND_H__
+
+#define RAND_MAX 0xffffffff
+
+/*
+ * Seed the random number generator using the eth0 MAC address
+ */
+void srand_mac(void);
+
+/*
+ * Get a random number (after seeding with MAC address)
+ *
+ * @return random number
+ */
+unsigned long rand(void);
+
+#endif /* __NET_RAND_H__ */