udev: net_id - add builtin to retrieve data for network devices

1 files changed, 55 insertions, 0 deletions

diff --git a/src/udev/udev-builtin-net_id.c b/src/udev/udev-builtin-net_id.c
new file mode 100644
index 0000000000..eff4552778
--- /dev/null
+++ b/src/udev/udev-builtin-net_id.c
@@ -0,0 +1,55 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2012 Kay Sievers <kay@vrfy.org>
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include "udev.h"
+
+/* IEEE Organizationally Unique Identifier */
+static int lookup_OUI(struct udev_device *dev, bool test) {
+        const char *addr;
+        unsigned int a1, a2, a3;
+        char oui[16];
+
+        addr = udev_device_get_sysattr_value(dev, "address");
+        if (!addr)
+                return -ENOENT;
+
+        if (sscanf(addr, "%x:%x:%x:", &a1, &a2, &a3) != 3)
+                return -EINVAL;
+
+        snprintf(oui, sizeof(oui), "OUI:%X%X%X", a1, a2, a3);
+        return udev_builtin_hwdb_lookup(dev, oui, test);
+}
+
+static int builtin_net_id(struct udev_device *dev, int argc, char *argv[], bool test) {
+        lookup_OUI(dev, test);
+        return EXIT_SUCCESS;
+}
+
+const struct udev_builtin udev_builtin_net_id = {
+        .name = "net_id",
+        .cmd = builtin_net_id,
+        .help = "network device properties",
+};