NetworkManager/src/settings/plugins/ifupdown/nms-ifupdown-plugin.c
Thomas Haller 7661ad64ba all: use cast macros instead of C cast
When building with assertions, they nm_assert() for the
type. Otherwise, they are identical to a C cast.

Also, where possible, don't cast at all, but adjust
the type instead.

Also, there were a few missing casts.
2017-12-06 10:34:28 +01:00

546 lines
18 KiB
C

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager system settings service (ifupdown)
*
* Alexander Sack <asac@ubuntu.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* (C) Copyright 2007,2008 Canonical Ltd.
* (C) Copyright 2009 - 2011 Red Hat, Inc.
*/
#include "nm-default.h"
#include "nms-ifupdown-plugin.h"
#include <string.h>
#include <arpa/inet.h>
#include <gmodule.h>
#include <libudev.h>
#include "nm-setting-connection.h"
#include "nm-dbus-interface.h"
#include "settings/nm-settings-plugin.h"
#include "nm-setting-ip4-config.h"
#include "nm-setting-wireless.h"
#include "nm-setting-wired.h"
#include "nm-setting-ppp.h"
#include "nm-utils.h"
#include "nm-core-internal.h"
#include "NetworkManagerUtils.h"
#include "nm-config.h"
#include "nm-utils/nm-udev-utils.h"
#include "nms-ifupdown-interface-parser.h"
#include "nms-ifupdown-connection.h"
#include "nms-ifupdown-parser.h"
#define ENI_INTERFACES_FILE "/etc/network/interfaces"
#define IFUPDOWN_PLUGIN_NAME "ifupdown"
#define IFUPDOWN_PLUGIN_INFO "(C) 2008 Canonical Ltd. To report bugs please use the NetworkManager mailing list."
#define IFUPDOWN_UNMANAGE_WELL_KNOWN_DEFAULT TRUE
/* #define ALWAYS_UNMANAGE TRUE */
#ifndef ALWAYS_UNMANAGE
#define ALWAYS_UNMANAGE FALSE
#endif
/*****************************************************************************/
typedef struct {
NMUdevClient *udev_client;
GHashTable *connections; /* /e/n/i block name :: NMIfupdownConnection */
/* Stores all blocks/interfaces read from /e/n/i regardless of whether
* there is an NMIfupdownConnection for block.
*/
GHashTable *eni_ifaces;
/* Stores any network interfaces the kernel knows about */
GHashTable *kernel_ifaces;
gboolean unmanage_well_known;
} SettingsPluginIfupdownPrivate;
struct _SettingsPluginIfupdown {
GObject parent;
SettingsPluginIfupdownPrivate _priv;
};
struct _SettingsPluginIfupdownClass {
GObjectClass parent;
};
static void settings_plugin_interface_init (NMSettingsPluginInterface *plugin_iface);
G_DEFINE_TYPE_EXTENDED (SettingsPluginIfupdown, settings_plugin_ifupdown, G_TYPE_OBJECT, 0,
G_IMPLEMENT_INTERFACE (NM_TYPE_SETTINGS_PLUGIN,
settings_plugin_interface_init))
#define SETTINGS_PLUGIN_IFUPDOWN_GET_PRIVATE(self) _NM_GET_PRIVATE (self, SettingsPluginIfupdown, SETTINGS_IS_PLUGIN_IFUPDOWN)
/*****************************************************************************/
static SettingsPluginIfupdown *settings_plugin_ifupdown_get (void);
NM_DEFINE_SINGLETON_GETTER (SettingsPluginIfupdown, settings_plugin_ifupdown_get, SETTINGS_TYPE_PLUGIN_IFUPDOWN);
/*****************************************************************************/
static void
bind_device_to_connection (SettingsPluginIfupdown *self,
struct udev_device *device,
NMIfupdownConnection *exported)
{
NMSettingWired *s_wired;
NMSettingWireless *s_wifi;
const char *iface, *address;
iface = udev_device_get_sysname (device);
if (!iface) {
nm_log_warn (LOGD_SETTINGS, "failed to get ifname for device.");
return;
}
address = udev_device_get_sysattr_value (device, "address");
if (!address || !address[0]) {
nm_log_warn (LOGD_SETTINGS, "failed to get MAC address for %s", iface);
return;
}
if (!nm_utils_hwaddr_valid (address, ETH_ALEN)) {
nm_log_warn (LOGD_SETTINGS, "failed to parse MAC address '%s' for %s",
address, iface);
return;
}
s_wired = nm_connection_get_setting_wired (NM_CONNECTION (exported));
s_wifi = nm_connection_get_setting_wireless (NM_CONNECTION (exported));
if (s_wired) {
nm_log_info (LOGD_SETTINGS, "locking wired connection setting");
g_object_set (s_wired, NM_SETTING_WIRED_MAC_ADDRESS, address, NULL);
} else if (s_wifi) {
nm_log_info (LOGD_SETTINGS, "locking wireless connection setting");
g_object_set (s_wifi, NM_SETTING_WIRELESS_MAC_ADDRESS, address, NULL);
}
nm_settings_connection_update (NM_SETTINGS_CONNECTION (exported),
NULL,
NM_SETTINGS_CONNECTION_PERSIST_MODE_DISK,
NM_SETTINGS_CONNECTION_COMMIT_REASON_NONE,
"ifupdown-new",
NULL);
}
static void
udev_device_added (SettingsPluginIfupdown *self, struct udev_device *device)
{
SettingsPluginIfupdownPrivate *priv = SETTINGS_PLUGIN_IFUPDOWN_GET_PRIVATE (self);
const char *iface, *path;
NMIfupdownConnection *exported;
iface = udev_device_get_sysname (device);
path = udev_device_get_syspath (device);
if (!iface || !path)
return;
nm_log_info (LOGD_SETTINGS, "devices added (path: %s, iface: %s)", path, iface);
/* if we have a configured connection for this particular iface
* we want to either unmanage the device or lock it
*/
exported = g_hash_table_lookup (priv->connections, iface);
if (!exported && !g_hash_table_lookup (priv->eni_ifaces, iface)) {
nm_log_info (LOGD_SETTINGS, "device added (path: %s, iface: %s): no ifupdown configuration found.",
path, iface);
return;
}
g_hash_table_insert (priv->kernel_ifaces, g_strdup (iface), udev_device_ref (device));
if (exported)
bind_device_to_connection (self, device, exported);
if (ALWAYS_UNMANAGE || priv->unmanage_well_known)
g_signal_emit_by_name (G_OBJECT (self), NM_SETTINGS_PLUGIN_UNMANAGED_SPECS_CHANGED);
}
static void
udev_device_removed (SettingsPluginIfupdown *self, struct udev_device *device)
{
SettingsPluginIfupdownPrivate *priv = SETTINGS_PLUGIN_IFUPDOWN_GET_PRIVATE (self);
const char *iface, *path;
iface = udev_device_get_sysname (device);
path = udev_device_get_syspath (device);
if (!iface || !path)
return;
nm_log_info (LOGD_SETTINGS, "devices removed (path: %s, iface: %s)", path, iface);
if (!g_hash_table_remove (priv->kernel_ifaces, iface))
return;
if (ALWAYS_UNMANAGE || priv->unmanage_well_known)
g_signal_emit_by_name (G_OBJECT (self), NM_SETTINGS_PLUGIN_UNMANAGED_SPECS_CHANGED);
}
static void
udev_device_changed (SettingsPluginIfupdown *self, struct udev_device *device)
{
SettingsPluginIfupdownPrivate *priv = SETTINGS_PLUGIN_IFUPDOWN_GET_PRIVATE (self);
const char *iface, *path;
iface = udev_device_get_sysname (device);
path = udev_device_get_syspath (device);
if (!iface || !path)
return;
nm_log_info (LOGD_SETTINGS, "device changed (path: %s, iface: %s)", path, iface);
if (!g_hash_table_lookup (priv->kernel_ifaces, iface))
return;
if (ALWAYS_UNMANAGE || priv->unmanage_well_known)
g_signal_emit_by_name (G_OBJECT (self), NM_SETTINGS_PLUGIN_UNMANAGED_SPECS_CHANGED);
}
static void
handle_uevent (NMUdevClient *client,
struct udev_device *device,
gpointer user_data)
{
SettingsPluginIfupdown *self = SETTINGS_PLUGIN_IFUPDOWN (user_data);
const char *subsys;
const char *action;
action = udev_device_get_action (device);
g_return_if_fail (action != NULL);
/* A bit paranoid */
subsys = udev_device_get_subsystem (device);
g_return_if_fail (nm_streq0 (subsys, "net"));
if (!strcmp (action, "add"))
udev_device_added (self, device);
else if (!strcmp (action, "remove"))
udev_device_removed (self, device);
else if (!strcmp (action, "change"))
udev_device_changed (self, device);
}
/* Returns the plugins currently known list of connections. The returned
* list is freed by the system settings service.
*/
static GSList*
get_connections (NMSettingsPlugin *config)
{
SettingsPluginIfupdownPrivate *priv = SETTINGS_PLUGIN_IFUPDOWN_GET_PRIVATE ((SettingsPluginIfupdown *) config);
GSList *connections;
nm_log_info (LOGD_SETTINGS, "(%d) ... get_connections.", GPOINTER_TO_UINT(config));
if(priv->unmanage_well_known) {
nm_log_info (LOGD_SETTINGS, "(%d) ... get_connections (managed=false): return empty list.", GPOINTER_TO_UINT(config));
return NULL;
}
connections = _nm_utils_hash_values_to_slist (priv->connections);
nm_log_info (LOGD_SETTINGS, "(%d) connections count: %d", GPOINTER_TO_UINT(config), g_slist_length(connections));
return connections;
}
/*
* Return a list of device specifications which NetworkManager should not
* manage. Returned list will be freed by the system settings service, and
* each element must be allocated using g_malloc() or its variants.
*/
static GSList*
get_unmanaged_specs (NMSettingsPlugin *config)
{
SettingsPluginIfupdownPrivate *priv = SETTINGS_PLUGIN_IFUPDOWN_GET_PRIVATE ((SettingsPluginIfupdown *) config);
GSList *specs = NULL;
GHashTableIter iter;
struct udev_device *device;
const char *iface;
if (!ALWAYS_UNMANAGE && !priv->unmanage_well_known)
return NULL;
nm_log_info (LOGD_SETTINGS, "get unmanaged devices count: %d",
g_hash_table_size (priv->kernel_ifaces));
g_hash_table_iter_init (&iter, priv->kernel_ifaces);
while (g_hash_table_iter_next (&iter, (gpointer) &iface, (gpointer) &device)) {
const char *address;
address = udev_device_get_sysattr_value (device, "address");
if (address)
specs = g_slist_append (specs, g_strdup_printf ("mac:%s", address));
else
specs = g_slist_append (specs, g_strdup_printf ("interface-name:%s", iface));
}
return specs;
}
/*****************************************************************************/
static void
get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec)
{
switch (prop_id) {
case NM_SETTINGS_PLUGIN_PROP_NAME:
g_value_set_string (value, IFUPDOWN_PLUGIN_NAME);
break;
case NM_SETTINGS_PLUGIN_PROP_INFO:
g_value_set_string (value, IFUPDOWN_PLUGIN_INFO);
break;
case NM_SETTINGS_PLUGIN_PROP_CAPABILITIES:
g_value_set_uint (value, NM_SETTINGS_PLUGIN_CAP_NONE);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/*****************************************************************************/
static void
_udev_device_unref (gpointer ptr)
{
udev_device_unref (ptr);
}
static void
init (NMSettingsPlugin *config)
{
SettingsPluginIfupdown *self = SETTINGS_PLUGIN_IFUPDOWN (config);
SettingsPluginIfupdownPrivate *priv = SETTINGS_PLUGIN_IFUPDOWN_GET_PRIVATE (self);
GHashTable *auto_ifaces;
if_block *block = NULL;
struct udev_enumerate *enumerate;
struct udev_list_entry *keys;
GHashTableIter con_iter;
const char *block_name;
NMIfupdownConnection *connection;
auto_ifaces = g_hash_table_new (nm_str_hash, g_str_equal);
if(!priv->connections)
priv->connections = g_hash_table_new (nm_str_hash, g_str_equal);
if(!priv->kernel_ifaces)
priv->kernel_ifaces = g_hash_table_new_full (nm_str_hash, g_str_equal, g_free, _udev_device_unref);
if(!priv->eni_ifaces)
priv->eni_ifaces = g_hash_table_new (nm_str_hash, g_str_equal);
nm_log_info (LOGD_SETTINGS, "init!");
priv->udev_client = nm_udev_client_new ((const char *[]) { "net", NULL },
handle_uevent, self);
/* Read in all the interfaces */
ifparser_init (ENI_INTERFACES_FILE, 0);
block = ifparser_getfirst ();
while (block) {
if(!strcmp ("auto", block->type) || !strcmp ("allow-hotplug", block->type))
g_hash_table_insert (auto_ifaces, block->name, GUINT_TO_POINTER (1));
else if (!strcmp ("iface", block->type)) {
NMIfupdownConnection *exported;
/* Bridge configuration */
if(!strncmp ("br", block->name, 2)) {
/* Try to find bridge ports */
const char *ports = ifparser_getkey (block, "bridge-ports");
if (ports) {
int i;
int state = 0;
char **port_ifaces;
nm_log_info (LOGD_SETTINGS, "found bridge ports %s for %s", ports, block->name);
port_ifaces = g_strsplit_set (ports, " \t", -1);
for (i = 0; i < g_strv_length (port_ifaces); i++) {
char *token = port_ifaces[i];
/* Skip crazy stuff like regex or all */
if (!strcmp ("all", token)) {
continue;
}
/* Small SM to skip everything inside regex */
if (!strcmp ("regex", token)) {
state++;
continue;
}
if (!strcmp ("noregex", token)) {
state--;
continue;
}
if (state == 0 && strlen (token) > 0) {
nm_log_info (LOGD_SETTINGS, "adding bridge port %s to eni_ifaces", token);
g_hash_table_insert (priv->eni_ifaces, g_strdup (token), "known");
}
}
g_strfreev (port_ifaces);
}
goto next;
}
/* Skip loopback configuration */
if(!strcmp ("lo", block->name)) {
goto next;
}
/* Remove any connection for this block that was previously found */
exported = g_hash_table_lookup (priv->connections, block->name);
if (exported) {
nm_log_info (LOGD_SETTINGS, "deleting %s from connections", block->name);
nm_settings_connection_delete (NM_SETTINGS_CONNECTION (exported), NULL);
g_hash_table_remove (priv->connections, block->name);
}
/* add the new connection */
exported = nm_ifupdown_connection_new (block);
if (exported) {
nm_log_info (LOGD_SETTINGS, "adding %s to connections", block->name);
g_hash_table_insert (priv->connections, block->name, exported);
}
nm_log_info (LOGD_SETTINGS, "adding iface %s to eni_ifaces", block->name);
g_hash_table_insert (priv->eni_ifaces, block->name, "known");
} else if (!strcmp ("mapping", block->type)) {
g_hash_table_insert (priv->eni_ifaces, block->name, "known");
nm_log_info (LOGD_SETTINGS, "adding mapping %s to eni_ifaces", block->name);
}
next:
block = block->next;
}
/* Make 'auto' interfaces autoconnect=TRUE */
g_hash_table_iter_init (&con_iter, priv->connections);
while (g_hash_table_iter_next (&con_iter, (gpointer) &block_name, (gpointer) &connection)) {
NMSettingConnection *setting;
if (g_hash_table_lookup (auto_ifaces, block_name)) {
setting = nm_connection_get_setting_connection (NM_CONNECTION (connection));
g_object_set (setting, NM_SETTING_CONNECTION_AUTOCONNECT, TRUE, NULL);
nm_log_info (LOGD_SETTINGS, "autoconnect");
}
}
g_hash_table_destroy (auto_ifaces);
/* Check the config file to find out whether to manage interfaces */
priv->unmanage_well_known = !nm_config_data_get_value_boolean (NM_CONFIG_GET_DATA_ORIG,
NM_CONFIG_KEYFILE_GROUP_IFUPDOWN,
NM_CONFIG_KEYFILE_KEY_IFUPDOWN_MANAGED,
!IFUPDOWN_UNMANAGE_WELL_KNOWN_DEFAULT);
nm_log_info (LOGD_SETTINGS, "management mode: %s", priv->unmanage_well_known ? "unmanaged" : "managed");
/* Add well-known interfaces */
enumerate = nm_udev_client_enumerate_new (priv->udev_client);
udev_enumerate_scan_devices (enumerate);
keys = udev_enumerate_get_list_entry (enumerate);
for (; keys; keys = udev_list_entry_get_next (keys)) {
struct udev_device *udevice;
udevice = udev_device_new_from_syspath (udev_enumerate_get_udev (enumerate),
udev_list_entry_get_name (keys));
if (udevice) {
udev_device_added (self, udevice);
udev_device_unref (udevice);
}
}
udev_enumerate_unref (enumerate);
/* Now if we're running in managed mode, let NM know there are new connections */
if (!priv->unmanage_well_known) {
GList *con_list = g_hash_table_get_values (priv->connections);
GList *cl_iter;
for (cl_iter = con_list; cl_iter; cl_iter = g_list_next (cl_iter)) {
g_signal_emit_by_name (self,
NM_SETTINGS_PLUGIN_CONNECTION_ADDED,
NM_SETTINGS_CONNECTION (cl_iter->data));
}
g_list_free (con_list);
}
nm_log_info (LOGD_SETTINGS, "end _init.");
}
/*****************************************************************************/
static void
settings_plugin_ifupdown_init (SettingsPluginIfupdown *plugin)
{
}
static void
dispose (GObject *object)
{
SettingsPluginIfupdown *plugin = SETTINGS_PLUGIN_IFUPDOWN (object);
SettingsPluginIfupdownPrivate *priv = SETTINGS_PLUGIN_IFUPDOWN_GET_PRIVATE (plugin);
g_clear_pointer (&priv->kernel_ifaces, g_hash_table_destroy);
g_clear_pointer (&priv->eni_ifaces, g_hash_table_destroy);
priv->udev_client = nm_udev_client_unref (priv->udev_client);
G_OBJECT_CLASS (settings_plugin_ifupdown_parent_class)->dispose (object);
}
static void
settings_plugin_ifupdown_class_init (SettingsPluginIfupdownClass *req_class)
{
GObjectClass *object_class = G_OBJECT_CLASS (req_class);
object_class->dispose = dispose;
object_class->get_property = get_property;
g_object_class_override_property (object_class,
NM_SETTINGS_PLUGIN_PROP_NAME,
NM_SETTINGS_PLUGIN_NAME);
g_object_class_override_property (object_class,
NM_SETTINGS_PLUGIN_PROP_INFO,
NM_SETTINGS_PLUGIN_INFO);
g_object_class_override_property (object_class,
NM_SETTINGS_PLUGIN_PROP_CAPABILITIES,
NM_SETTINGS_PLUGIN_CAPABILITIES);
}
static void
settings_plugin_interface_init (NMSettingsPluginInterface *plugin_iface)
{
plugin_iface->init = init;
plugin_iface->get_connections = get_connections;
plugin_iface->get_unmanaged_specs = get_unmanaged_specs;
}
/*****************************************************************************/
G_MODULE_EXPORT GObject *
nm_settings_plugin_factory (void)
{
return G_OBJECT (g_object_ref (settings_plugin_ifupdown_get ()));
}