config: parse default mac address from board.json

[project/netifd.git] / config.c

diff --git a/config.c b/config.c
index d91830c8a931917239a3502a4f256674cfad2627..fa7cbe42052d28b37ffd797fb263e35537da3d2c 100644 (file)
--- a/config.c
+++ b/config.c
@@ -18,6 +18,8 @@
 
 #include <uci.h>
 
+#include <libubox/blobmsg_json.h>
+
 #include "netifd.h"
 #include "interface.h"
 #include "interface-ip.h"
@@ -31,6 +33,7 @@ bool config_init = false;
 static struct uci_context *uci_ctx;
 static struct uci_package *uci_network;
 static struct uci_package *uci_wireless;
+static struct blob_attr *board_netdevs;
 static struct blob_buf b;
 
 static int
@@ -654,6 +657,57 @@ config_init_wireless(void)
        }
 }
 
+
+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);
+}
+
 int
 config_init_all(void)
 {
@@ -676,6 +730,8 @@ config_init_all(void)
                ret = -1;
        }
 
+       config_init_board();
+
        vlist_update(&interfaces);
        config_init = true;
        device_lock();