+
+static struct blob_attr *
+config_find_blobmsg_attr(struct blob_attr *attr, const char *name, int type)
+{
+ struct blobmsg_policy policy = { .name = name, .type = type };
+ struct blob_attr *cur;
+
+ blobmsg_parse(&policy, 1, &cur, blobmsg_data(attr), blobmsg_len(attr));
+
+ return cur;
+}
+
+struct ether_addr *config_get_default_macaddr(const char *ifname)
+{
+ struct blob_attr *cur;
+
+ if (!board_netdevs)
+ return NULL;
+
+ cur = config_find_blobmsg_attr(board_netdevs, ifname, BLOBMSG_TYPE_TABLE);
+ if (!cur)
+ return NULL;
+
+ cur = config_find_blobmsg_attr(cur, "macaddr", BLOBMSG_TYPE_STRING);
+ if (!cur)
+ return NULL;
+
+ return ether_aton(blobmsg_get_string(cur));
+}
+
+static void
+config_init_board(void)
+{
+ struct blob_attr *cur;
+
+ blob_buf_init(&b, 0);
+
+ if (!blobmsg_add_json_from_file(&b, DEFAULT_BOARD_JSON))
+ return;
+
+ free(board_netdevs);
+ board_netdevs = NULL;
+
+ cur = config_find_blobmsg_attr(b.head, "network-device",
+ BLOBMSG_TYPE_TABLE);
+ if (!cur)
+ return;
+
+ board_netdevs = blob_memdup(cur);
+}
+