1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2017 Marek Behún <kabel@kernel.org>
4 */
5
6 #include <env.h>
7 #include <net.h>
8
9 #include "turris_common.h"
10
increment_mac(u8 * mac)11 static void increment_mac(u8 *mac)
12 {
13 int i;
14
15 for (i = 5; i >= 3; i--) {
16 mac[i] += 1;
17 if (mac[i])
18 break;
19 }
20 }
21
set_mac_if_invalid(int i,u8 * mac)22 static void set_mac_if_invalid(int i, u8 *mac)
23 {
24 u8 oldmac[6];
25
26 if (is_valid_ethaddr(mac) &&
27 !eth_env_get_enetaddr_by_index("eth", i, oldmac))
28 eth_env_set_enetaddr_by_index("eth", i, mac);
29 }
30
turris_init_mac_addresses(int first_idx,const u8 * first_mac)31 void turris_init_mac_addresses(int first_idx, const u8 *first_mac)
32 {
33 u8 mac[6];
34
35 memcpy(mac, first_mac, sizeof(mac));
36
37 set_mac_if_invalid((first_idx + 0) % 3, mac);
38 increment_mac(mac);
39 set_mac_if_invalid((first_idx + 1) % 3, mac);
40 increment_mac(mac);
41 set_mac_if_invalid((first_idx + 2) % 3, mac);
42 }
43