tests: net: hostname: Set MAC address properly to all interfaces

The test creates two network interfaces, but does not set MAC
address of one of them correctly (MAC address is all zeros).
This is not good and the issue fixed in commit 9468cb6
could have been revealed earlier.

Signed-off-by: Jukka Rissanen <[email protected]>

Author: jukkar

tests/net/hostname/src/main.c

@@ -29,7 +29,7 @@ LOG_MODULE_REGISTER(net_test, NET_LOG_LEVEL);
 #define NET_LOG_ENABLED 1
 #include "net_private.h"
 
-#if defined(CONFIG_NET_IF_LOG_LEVEL_DBG)
+#if defined(CONFIG_NET_HOSTNAME_LOG_LEVEL_DBG)
 #define DBG(fmt, ...) printk(fmt, ##__VA_ARGS__)
 #else
 #define DBG(fmt, ...)
@@ -143,6 +143,14 @@ static void eth_fake_iface_init(struct net_if *iface)
 
 	ctx->iface = iface;
 
+	/* 00-00-5E-00-53-xx Documentation RFC 7042 */
+	ctx->mac_address[0] = 0x00;
+	ctx->mac_address[1] = 0x00;
+	ctx->mac_address[2] = 0x5E;
+	ctx->mac_address[3] = 0x00;
+	ctx->mac_address[4] = 0x53;
+	ctx->mac_address[5] = sys_rand32_get();
+
 	net_if_set_link_addr(iface, ctx->mac_address,
 			     sizeof(ctx->mac_address),
 			     NET_LINK_ETHERNET);