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

Makefile.am

@@ -1861,6 +1861,7 @@ libudev_core_la_SOURCES = \
 	src/udev/udev-builtin-hwdb.c \
 	src/udev/udev-builtin-input_id.c \
 	src/udev/udev-builtin-kmod.c \
+	src/udev/udev-builtin-net_id.c \
 	src/udev/udev-builtin-path_id.c \
 	src/udev/udev-builtin-usb_id.c \
 	src/libsystemd-daemon/sd-daemon.c

rules/75-net-description.rules

@@ -3,12 +3,12 @@
 ACTION=="remove", GOTO="net_end"
 SUBSYSTEM!="net", GOTO="net_end"
 
-SUBSYSTEMS=="usb", ENV{ID_MODEL}=="", IMPORT{builtin}="usb_id"
-SUBSYSTEMS=="usb", IMPORT{builtin}="hwdb --subsystem=usb"
-SUBSYSTEMS=="usb", ATTRS{idVendor}!="", ATTRS{idProduct}!="", ENV{ID_VENDOR_ID}="$attr{idVendor}", ENV{ID_MODEL_ID}="$attr{idProduct}"
+IMPORT{builtin}="net_id"
+SUBSYSTEMS=="usb", IMPORT{builtin}="usb_id", IMPORT{builtin}="hwdb --subsystem=usb"
 SUBSYSTEMS=="usb", GOTO="net_end"
 
-IMPORT{builtin}="hwdb"
 SUBSYSTEMS=="pci", ENV{ID_BUS}="pci", ENV{ID_VENDOR_ID}="$attr{vendor}", ENV{ID_MODEL_ID}="$attr{device}"
 
+IMPORT{builtin}="hwdb"
+
 LABEL="net_end"

rules/75-tty-description.rules

@@ -3,13 +3,11 @@
 ACTION=="remove", GOTO="tty_end"
 SUBSYSTEM!="tty", GOTO="tty_end"
 
-SUBSYSTEMS=="usb", ENV{ID_MODEL}=="", IMPORT{builtin}="usb_id"
-SUBSYSTEMS=="usb", IMPORT{builtin}="hwdb --subsystem=usb"
-SUBSYSTEMS=="usb", ATTRS{idVendor}!="", ATTRS{idProduct}!="", ENV{ID_VENDOR_ID}="$attr{idVendor}", ENV{ID_MODEL_ID}="$attr{idProduct}"
+SUBSYSTEMS=="usb", IMPORT{builtin}="usb_id", IMPORT{builtin}="hwdb --subsystem=usb"
 SUBSYSTEMS=="usb", GOTO="tty_end"
 
-SUBSYSTEMS=="pci", IMPORT{builtin}="hwdb --subsystem=usb"
 SUBSYSTEMS=="pci", ENV{ID_BUS}="pci", ENV{ID_VENDOR_ID}="$attr{vendor}", ENV{ID_MODEL_ID}="$attr{device}"
 
+IMPORT{builtin}="hwdb"
 
 LABEL="tty_end"

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",
+};

src/udev/udev-builtin.c

@@ -36,6 +36,7 @@ static const struct udev_builtin *builtins[] = {
         [UDEV_BUILTIN_HWDB] = &udev_builtin_hwdb,
         [UDEV_BUILTIN_INPUT_ID] = &udev_builtin_input_id,
         [UDEV_BUILTIN_KMOD] = &udev_builtin_kmod,
+        [UDEV_BUILTIN_NET_ID] = &udev_builtin_net_id,
         [UDEV_BUILTIN_PATH_ID] = &udev_builtin_path_id,
         [UDEV_BUILTIN_USB_ID] = &udev_builtin_usb_id,
 #ifdef HAVE_ACL

src/udev/udev.h

@@ -140,6 +140,7 @@ enum udev_builtin_cmd {
         UDEV_BUILTIN_HWDB,
         UDEV_BUILTIN_INPUT_ID,
         UDEV_BUILTIN_KMOD,
+        UDEV_BUILTIN_NET_ID,
         UDEV_BUILTIN_PATH_ID,
         UDEV_BUILTIN_USB_ID,
 #ifdef HAVE_ACL
@@ -162,6 +163,7 @@ extern const struct udev_builtin udev_builtin_firmware;
 extern const struct udev_builtin udev_builtin_hwdb;
 extern const struct udev_builtin udev_builtin_input_id;
 extern const struct udev_builtin udev_builtin_kmod;
+extern const struct udev_builtin udev_builtin_net_id;
 extern const struct udev_builtin udev_builtin_path_id;
 extern const struct udev_builtin udev_builtin_usb_id;
 extern const struct udev_builtin udev_builtin_uaccess;