net: rename and refactor eth_rand_ethaddr() function
Some functions in include/net.h are ported from
include/linux/etherdevice.h of Linux Kernel.
For ex.
is_zero_ether_addr()
is_multicast_ether_addr()
is_broadcast_ether_addr()
is_valid_ether_addr();
So, we should use the same function name as that of Linux Kernel,
eth_rand_addr(), for consistency.
Besides, eth_rand_addr() has been implemented as an inline function.
So it should not be surrounded by #ifdef CONFIG_RANDOM_MACADDR.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/include/net.h b/include/net.h
index 0802fad..735b0b9 100644
--- a/include/net.h
+++ b/include/net.h
@@ -130,23 +130,6 @@
extern int eth_getenv_enetaddr_by_index(const char *base_name, int index,
uchar *enetaddr);
-#ifdef CONFIG_RANDOM_MACADDR
-/*
- * The u-boot policy does not allow hardcoded ethernet addresses. Under the
- * following circumstances a random generated address is allowed:
- * - in emergency cases, where you need a working network connection to set
- * the ethernet address.
- * Eg. you want a rescue boot and don't have a serial port to access the
- * CLI to set environment variables.
- *
- * In these cases, we generate a random locally administered ethernet address.
- *
- * Args:
- * enetaddr - returns 6 byte hardware address
- */
-extern void eth_random_enetaddr(uchar *enetaddr);
-#endif
-
extern int usb_eth_initialize(bd_t *bi);
extern int eth_init(bd_t *bis); /* Initialize the device */
extern int eth_send(void *packet, int length); /* Send a packet */
@@ -674,6 +657,25 @@
return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
}
+/**
+ * eth_random_addr - Generate software assigned random Ethernet address
+ * @addr: Pointer to a six-byte array containing the Ethernet address
+ *
+ * Generate a random Ethernet address (MAC) that is not multicast
+ * and has the local assigned bit set.
+ */
+static inline void eth_random_addr(uchar *addr)
+{
+ int i;
+ unsigned int seed = get_timer(0);
+
+ for (i = 0; i < 6; i++)
+ addr[i] = rand_r(&seed);
+
+ addr[0] &= 0xfe; /* clear multicast bit */
+ addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
+}
+
/* Convert an IP address to a string */
extern void ip_to_string(IPaddr_t x, char *s);