nm-default-route-manager.c 44.3 KB
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
 *
 * 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.
 *
 * Copyright (C) 2014 Red Hat, Inc.
 */


#include "config.h"

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#include "nm-default-route-manager.h"

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#include "string.h"

#include "nm-logging.h"
#include "nm-device.h"
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#include "nm-vpn-connection.h"
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#include "nm-platform.h"
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#include "nm-manager.h"
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#include "nm-ip4-config.h"
#include "nm-ip6-config.h"
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#include "nm-activation-request.h"
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typedef struct {
	GPtrArray *entries_ip4;
	GPtrArray *entries_ip6;
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	struct {
		guint guard;
		guint backoff_wait_time_ms;
		guint idle_handle;
		gboolean has_v4_changes;
		gboolean has_v6_changes;
	} resync;
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} NMDefaultRouteManagerPrivate;

#define NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_DEFAULT_ROUTE_MANAGER, NMDefaultRouteManagerPrivate))

G_DEFINE_TYPE (NMDefaultRouteManager, nm_default_route_manager, G_TYPE_OBJECT)

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static NMDefaultRouteManager *singleton_instance;
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#define _LOG(level, addr_family, ...) \
    G_STMT_START { \
        int __addr_family = (addr_family); \
        guint64 __domain = __addr_family == AF_INET ? LOGD_IP4 : LOGD_IP6; \
        \
        if (nm_logging_enabled ((level), (__domain))) { \
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            char __ch = __addr_family == AF_INET ? '4' : (__addr_family == AF_INET6 ? '6' : '-'); \
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            char __prefix[30] = "default-route"; \
            \
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            if ((self) != singleton_instance) \
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                g_snprintf (__prefix, sizeof (__prefix), "default-route%c[%p]", __ch, (self)); \
            else \
                __prefix[STRLEN ("default-route")] = __ch; \
            nm_log ((level), (__domain), \
                    "%s: " _NM_UTILS_MACRO_FIRST(__VA_ARGS__), \
                    __prefix _NM_UTILS_MACRO_REST(__VA_ARGS__)); \
        } \
    } G_STMT_END

#define _LOGD(addr_family, ...)      _LOG (LOGL_DEBUG, addr_family, __VA_ARGS__)
#define _LOGI(addr_family, ...)      _LOG (LOGL_INFO , addr_family, __VA_ARGS__)
#define _LOGW(addr_family, ...)      _LOG (LOGL_WARN , addr_family, __VA_ARGS__)
#define _LOGE(addr_family, ...)      _LOG (LOGL_ERR  , addr_family, __VA_ARGS__)

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#define LOG_ENTRY_FMT  "entry[%u/%s:%p:%s:%c%c]"
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#define LOG_ENTRY_ARGS(entry_idx, entry) \
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		(entry_idx), \
		NM_IS_DEVICE ((entry)->source.pointer) ? "dev" : "vpn", \
		(entry)->source.pointer, \
		NM_IS_DEVICE ((entry)->source.pointer) ? nm_device_get_iface ((entry)->source.device) : nm_vpn_connection_get_connection_id ((entry)->source.vpn), \
		((entry)->never_default ? 'N' : 'n'), \
		((entry)->synced ? 'S' : 's')
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/***********************************************************************************/

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static void _resync_idle_cancel (NMDefaultRouteManager *self);

/***********************************************************************************/

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typedef struct {
	union {
		void *pointer;
		GObject *object;
		NMDevice *device;
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		NMVpnConnection *vpn;
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	} source;
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	NMPlatformIPXRoute route;
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	/* Whether the route is synced to platform and has a default route.
	 *
	 * ( synced && !never_default): the interface gets a default route that
	 *     is enforced and managed by NMDefaultRouteManager.
	 *
	 * (!synced && !never_default): the interface has this route, but it is assumed.
	 *     Assumed interfaces are those that have no tracked entry or that only have
	 *     (!synced && !never_default) entries. NMDefaultRouteManager will not touch
	 *     default routes on these interfaces.
	 *     This combination makes only sense for device sources.
	 *     They are tracked so that assumed devices can also be the best device.
	 *
	 * ( synced &&  never_default): entries of this kind are a placeholder
	 *     to indicate that the ifindex is managed but has no default-route.
	 *     Missing entries also indicate that a certain ifindex has no default-route.
	 *     The difference is that missing entries are considered assumed while on
	 *     (synced && never_default) entires the absence of the default route
	 *     is enforced. NMDefaultRouteManager will actively remove any default
	 *     route on such ifindexes.
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	 *     Also, for VPN sources in addition we track them so that a never-default
	 *     VPN connection can be choosen by get_best_config() to receive the DNS configuration.
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	 *
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	 * (!synced &&  never_default): this combination makes no sense.
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	 */
	gboolean synced;
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	gboolean never_default;

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	guint32 effective_metric;
} Entry;

typedef struct {
	int addr_family;
	GPtrArray *(*get_entries) (NMDefaultRouteManagerPrivate *priv);
	const char *(*platform_route_to_string) (const NMPlatformIPRoute *route);
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	GArray *(*platform_route_get_all) (int ifindex, NMPlatformGetRouteMode mode);
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	gboolean (*platform_route_delete_default) (int ifindex, guint32 metric);
	guint32 (*route_metric_normalize) (guint32 metric);
} VTableIP;

static const VTableIP vtable_ip4, vtable_ip6;

#define VTABLE_IS_IP4 (vtable->addr_family == AF_INET)

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static NMPlatformIPRoute *
_vt_route_index (const VTableIP *vtable, GArray *routes, guint index)
{
	if (VTABLE_IS_IP4)
		return (NMPlatformIPRoute *) &g_array_index (routes, NMPlatformIP4Route, index);
	else
		return (NMPlatformIPRoute *) &g_array_index (routes, NMPlatformIP6Route, index);
}

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static gboolean
_vt_routes_has_entry (const VTableIP *vtable, GArray *routes, const Entry *entry)
{
	guint i;
	NMPlatformIPXRoute route = entry->route;

	route.rx.metric = entry->effective_metric;

	if (VTABLE_IS_IP4) {
		for (i = 0; i < routes->len; i++) {
			NMPlatformIP4Route *r = &g_array_index (routes, NMPlatformIP4Route, i);

			route.rx.source = r->source;
			if (nm_platform_ip4_route_cmp (r, &route.r4) == 0)
				return TRUE;
		}
	} else {
		for (i = 0; i < routes->len; i++) {
			NMPlatformIP6Route *r = &g_array_index (routes, NMPlatformIP6Route, i);

			route.rx.source = r->source;
			if (nm_platform_ip6_route_cmp (r, &route.r6) == 0)
				return TRUE;
		}
	}
	return FALSE;
}

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static void
_entry_free (Entry *entry)
{
	if (entry) {
		g_object_unref (entry->source.object);
		g_slice_free (Entry, entry);
	}
}

static Entry *
_entry_find_by_source (GPtrArray *entries, gpointer source, guint *out_idx)
{
	guint i;

	for (i = 0; i < entries->len; i++) {
		Entry *e = g_ptr_array_index (entries, i);

		if (e->source.pointer == source) {
			if (out_idx)
				*out_idx = i;
			return e;
		}
	}

	if (out_idx)
		*out_idx = G_MAXUINT;
	return NULL;
}

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static gboolean
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_platform_route_sync_add (const VTableIP *vtable, NMDefaultRouteManager *self, guint32 metric)
{
	NMDefaultRouteManagerPrivate *priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);
	GPtrArray *entries = vtable->get_entries (priv);
	guint i;
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	Entry *entry_unsynced = NULL;
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	Entry *entry = NULL;
	gboolean success;

	/* Find the entries for the given metric.
	 * The effective metric for synced entries is choosen in a way that it
	 * is unique (except for G_MAXUINT32, where a clash is not solvable). */
	for (i = 0; i < entries->len; i++) {
		Entry *e = g_ptr_array_index (entries, i);

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		if (e->never_default)
			continue;

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		if (e->effective_metric != metric)
			continue;

		if (e->synced) {
			g_assert (!entry || metric == G_MAXUINT32);
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			if (!entry)
				entry = e;
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		} else
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			entry_unsynced = e;
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	}

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	/* We don't expect to have an unsynced *and* a synced entry for the same metric.
	 * Unless, (a) their metric is G_MAXUINT32, in which case we could not find an unused effective metric,
	 * or (b) if we have an unsynced and a synced entry for the same ifindex.
	 * The latter case happens for example when activating an openvpn connection (synced) and
	 * assuming the corresponding tun0 interface (unsynced). */
	g_assert (!entry || !entry_unsynced || (entry->route.rx.ifindex == entry_unsynced->route.rx.ifindex) || metric == G_MAXUINT32);
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	/* we only add the route, if we have an (to be synced) entry for it. */
	if (!entry)
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		return FALSE;
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	if (VTABLE_IS_IP4) {
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		success = nm_platform_ip4_route_add (entry->route.rx.ifindex,
		                                     entry->route.rx.source,
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		                                     0,
		                                     0,
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		                                     entry->route.r4.gateway,
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		                                     0,
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		                                     entry->effective_metric,
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		                                     entry->route.rx.mss);
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	} else {
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		success = nm_platform_ip6_route_add (entry->route.rx.ifindex,
		                                     entry->route.rx.source,
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		                                     in6addr_any,
		                                     0,
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		                                     entry->route.r6.gateway,
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		                                     entry->effective_metric,
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		                                     entry->route.rx.mss);
	}
	if (!success) {
		_LOGW (vtable->addr_family, "failed to add default route %s with effective metric %u",
		       vtable->platform_route_to_string (&entry->route.rx), (guint) entry->effective_metric);
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	}
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	return TRUE;
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}

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static gboolean
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_platform_route_sync_flush (const VTableIP *vtable, NMDefaultRouteManager *self, int ifindex_to_flush)
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{
	NMDefaultRouteManagerPrivate *priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);
	GPtrArray *entries = vtable->get_entries (priv);
	GArray *routes;
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	guint i, j;
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	gboolean changed = FALSE;
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	/* prune all other default routes from this device. */
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	routes = vtable->platform_route_get_all (0, NM_PLATFORM_GET_ROUTE_MODE_ONLY_DEFAULT);
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	for (i = 0; i < routes->len; i++) {
		const NMPlatformIPRoute *route;
		gboolean has_ifindex_synced = FALSE;
		Entry *entry = NULL;

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		route = _vt_route_index (vtable, routes, i);
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		/* look at all entires and see if the route for this ifindex pair is
		 * a known entry. */
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		for (j = 0; j < entries->len; j++) {
			Entry *e = g_ptr_array_index (entries, j);
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			if (   e->route.rx.ifindex == route->ifindex
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			    && e->synced) {
				has_ifindex_synced = TRUE;
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				if (   !e->never_default
				    && e->effective_metric == route->metric)
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					entry = e;
			}
		}

		/* we only delete the route if we don't have a matching entry,
		 * and there is at least one entry that references this ifindex
		 * (indicating that the ifindex is managed by us -- not assumed).
		 *
		 * Otherwise, don't delete the route because it's configured
		 * externally (and will be assumed -- or already is assumed).
		 */
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		if (   !entry
		    && (has_ifindex_synced || ifindex_to_flush == route->ifindex)) {
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			vtable->platform_route_delete_default (route->ifindex, route->metric);
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			changed = TRUE;
		}
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	}
	g_array_free (routes, TRUE);
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	return changed;
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}

static int
_sort_entries_cmp (gconstpointer a, gconstpointer b, gpointer user_data)
{
	guint32 m_a, m_b;
	const Entry *e_a = *((const Entry **) a);
	const Entry *e_b = *((const Entry **) b);

	/* when comparing routes, we consider the (original) metric. */
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	m_a = e_a->route.rx.metric;
	m_b = e_b->route.rx.metric;
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	/* we normalize route.metric already in _ipx_update_default_route().
	 * so we can just compare the metrics numerically */

	if (m_a != m_b)
		return (m_a < m_b) ? -1 : 1;

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	/* If the metrics are equal, we prefer the one that is !never_default */
	if (!!e_a->never_default != !!e_b->never_default)
		return e_a->never_default ? 1 : -1;

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	/* If the metrics are equal, we prefer the one that is assumed (!synced).
	 * Entries that we sync, can be modified so that only the best
	 * entry has a (deterministically) lowest metric.
	 * With assumed devices we cannot increase/change the metric.
	 * For example: two devices, both metric 0. One is assumed the other is
	 * synced.
	 * If we would choose the synced entry as best, we cannot
	 * increase the metric of the assumed one and we would have non-determinism.
	 * If we instead prefer the assumed device, we can increase the metric
	 * of the synced device and the assumed device is (deterministically)
	 * prefered.
	 * If both devices are assumed, we also have non-determinism, but also
	 * we don't reorder either.
	 */
	if (!!e_a->synced != !!e_b->synced)
		return e_a->synced ? 1 : -1;

	/* otherwise, do not reorder */
	return 0;
}

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static GHashTable *
_get_assumed_interface_metrics (const VTableIP *vtable, NMDefaultRouteManager *self, GArray *routes)
{
	NMDefaultRouteManagerPrivate *priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);
	GPtrArray *entries;
	guint i, j;
	GHashTable *result;

	/* create a list of all metrics that are currently assigned on an interface
	 * that is *not* already covered by one of our synced entries.
	 * IOW, returns the metrics that are in use by assumed interfaces
	 * that we want to preserve. */

	entries = vtable->get_entries (priv);

	result = g_hash_table_new (NULL, NULL);

	for (i = 0; i < routes->len; i++) {
		gboolean ifindex_has_synced_entry = FALSE;
		const NMPlatformIPRoute *route;

		route = _vt_route_index (vtable, routes, i);

		for (j = 0; j < entries->len; j++) {
			Entry *e = g_ptr_array_index (entries, j);

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			if (   e->synced
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			    && e->route.rx.ifindex == route->ifindex) {
				ifindex_has_synced_entry = TRUE;
				break;
			}
		}

		if (!ifindex_has_synced_entry)
			g_hash_table_add (result, GUINT_TO_POINTER (vtable->route_metric_normalize (route->metric)));
	}

	return result;
}

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static int
_sort_metrics_ascending_fcn (gconstpointer a, gconstpointer b)
{
	guint32 m_a = *((guint32 *) a);
	guint32 m_b = *((guint32 *) b);

	if (m_a < m_b)
		return -1;
	return m_a == m_b ? 0 : 1;
}

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static gboolean
_resync_all (const VTableIP *vtable, NMDefaultRouteManager *self, const Entry *changed_entry, const Entry *old_entry, gboolean external_change)
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{
	NMDefaultRouteManagerPrivate *priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);
	Entry *entry;
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	guint i, j;
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	gint64 last_metric = -1;
	guint32 expected_metric;
	GPtrArray *entries;
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	GArray *changed_metrics = g_array_new (FALSE, FALSE, sizeof (guint32));
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	GHashTable *assumed_metrics;
	GArray *routes;
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	gboolean changed = FALSE;
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	int ifindex_to_flush = 0;
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	g_assert (priv->resync.guard == 0);
	priv->resync.guard++;

	if (!external_change) {
		if (VTABLE_IS_IP4)
			priv->resync.has_v4_changes = FALSE;
		else
			priv->resync.has_v6_changes = FALSE;
		if (!priv->resync.has_v4_changes && !priv->resync.has_v6_changes)
			_resync_idle_cancel (self);
	}
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	entries = vtable->get_entries (priv);

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	routes = vtable->platform_route_get_all (0, NM_PLATFORM_GET_ROUTE_MODE_ONLY_DEFAULT);

	assumed_metrics = _get_assumed_interface_metrics (vtable, self, routes);

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	if (old_entry && old_entry->synced && !old_entry->never_default) {
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		/* The old version obviously changed. */
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		g_array_append_val (changed_metrics, old_entry->effective_metric);
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	}

	/* first iterate over all entries and adjust the effective metrics. */
	for (i = 0; i < entries->len; i++) {
		entry = g_ptr_array_index (entries, i);

		g_assert (entry != old_entry);

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		if (entry->never_default)
			continue;

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		if (!entry->synced) {
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			gboolean has_synced_entry = FALSE;

			/* A non synced entry is completely ignored, if we have
			 * a synced entry for the same if index.
			 * Otherwise the metric of the entry is still remembered as
			 * last_metric to avoid reusing it. */
			for (j = 0; j < entries->len; j++) {
				const Entry *e = g_ptr_array_index (entries, j);

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				if (   e->synced
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					&& e->route.rx.ifindex == entry->route.rx.ifindex) {
					has_synced_entry = TRUE;
					break;
				}
			}
			if (!has_synced_entry)
				last_metric = MAX (last_metric, (gint64) entry->effective_metric);
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			continue;
		}

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		expected_metric = entry->route.rx.metric;
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		if ((gint64) expected_metric <= last_metric)
			expected_metric = last_metric == G_MAXUINT32 ? G_MAXUINT32 : last_metric + 1;

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		while (   expected_metric < G_MAXUINT32
		       && g_hash_table_contains (assumed_metrics, GUINT_TO_POINTER (expected_metric))) {
			gboolean has_metric_for_ifindex = FALSE;

			/* Check if there are assumed devices that have default routes with this metric.
			 * If there are any, we have to pick another effective_metric. */

			/* However, if there is a matching route (ifindex+metric) for our current entry, we are done. */
			for (j = 0; j < routes->len; j++) {
				const NMPlatformIPRoute *r = _vt_route_index (vtable, routes, i);

				if (   r->metric == expected_metric
				    && r->ifindex == entry->route.rx.ifindex) {
					has_metric_for_ifindex = TRUE;
					break;
				}
			}
			if (has_metric_for_ifindex)
				break;
			expected_metric++;
		}

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		if (changed_entry == entry) {
			/* for the changed entry, the previous metric was either old_entry->effective_metric,
			 * or none. Hence, we only have to remember what is going to change. */
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			g_array_append_val (changed_metrics, expected_metric);
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			if (old_entry) {
				_LOGD (vtable->addr_family, LOG_ENTRY_FMT": update %s (%u -> %u)", LOG_ENTRY_ARGS (i, entry),
				       vtable->platform_route_to_string (&entry->route.rx), (guint) old_entry->effective_metric,
				       (guint) expected_metric);
			} else {
				_LOGD (vtable->addr_family, LOG_ENTRY_FMT": add %s (%u)", LOG_ENTRY_ARGS (i, entry),
				       vtable->platform_route_to_string (&entry->route.rx), (guint) expected_metric);
			}
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		} else if (entry->effective_metric != expected_metric) {
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			g_array_append_val (changed_metrics, entry->effective_metric);
			g_array_append_val (changed_metrics, expected_metric);
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			_LOGD (vtable->addr_family, LOG_ENTRY_FMT": resync metric %s (%u -> %u)", LOG_ENTRY_ARGS (i, entry),
			       vtable->platform_route_to_string (&entry->route.rx), (guint) entry->effective_metric,
			       (guint) expected_metric);
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		} else {
			if (!_vt_routes_has_entry (vtable, routes, entry)) {
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				g_array_append_val (changed_metrics, entry->effective_metric);
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				_LOGD (vtable->addr_family, LOG_ENTRY_FMT": readd route %s (%u -> %u)", LOG_ENTRY_ARGS (i, entry),
				       vtable->platform_route_to_string (&entry->route.rx), (guint) entry->effective_metric,
				       (guint) entry->effective_metric);
			}
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		}

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		if (entry->effective_metric != expected_metric) {
			entry->effective_metric = expected_metric;
			changed = TRUE;
		}
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		last_metric = expected_metric;
	}

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	g_array_free (routes, TRUE);

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	g_array_sort (changed_metrics, _sort_metrics_ascending_fcn);
	last_metric = -1;
	for (j = 0; j < changed_metrics->len; j++) {
		expected_metric = g_array_index (changed_metrics, guint32, j);

		if (last_metric == (gint64) expected_metric) {
			/* skip duplicates. */
			continue;
		}
		changed |= _platform_route_sync_add (vtable, self, expected_metric);
		last_metric = expected_metric;
	}

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	if (   old_entry
	    && !changed_entry
	    && old_entry->synced
	    && !old_entry->never_default) {
		/* If we entriely remove an entry that was synced before, we must make
		 * sure to flush routes for this ifindex too. Otherwise they linger
		 * around as "assumed" routes */
		ifindex_to_flush = old_entry->route.rx.ifindex;
	}

	changed |= _platform_route_sync_flush (vtable, self, ifindex_to_flush);
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	g_array_free (changed_metrics, TRUE);
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	g_hash_table_unref (assumed_metrics);
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	priv->resync.guard--;
	return changed;
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}

static void
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_entry_at_idx_update (const VTableIP *vtable, NMDefaultRouteManager *self, guint entry_idx, const Entry *old_entry)
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{
	NMDefaultRouteManagerPrivate *priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);
	Entry *entry;
	GPtrArray *entries;

	entries = vtable->get_entries (priv);
	g_assert (entry_idx < entries->len);

	entry = g_ptr_array_index (entries, entry_idx);

	g_assert (   !old_entry
596
	          || (entry->source.pointer == old_entry->source.pointer && entry->route.rx.ifindex == old_entry->route.rx.ifindex));
597

598
	if (!entry->synced && !entry->never_default)
599
		entry->effective_metric = entry->route.rx.metric;
600 601 602 603 604

	_LOGD (vtable->addr_family, LOG_ENTRY_FMT": %s %s",
	       LOG_ENTRY_ARGS (entry_idx, entry),
	       old_entry ? "update" : "add",
	       vtable->platform_route_to_string (&entry->route.rx));
605 606 607

	g_ptr_array_sort_with_data (entries, _sort_entries_cmp, NULL);

608
	_resync_all (vtable, self, entry, old_entry, FALSE);
609 610 611
}

static void
612
_entry_at_idx_remove (const VTableIP *vtable, NMDefaultRouteManager *self, guint entry_idx)
613 614 615 616 617 618 619 620 621 622 623
{
	NMDefaultRouteManagerPrivate *priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);
	Entry *entry;
	GPtrArray *entries;

	entries = vtable->get_entries (priv);

	g_assert (entry_idx < entries->len);

	entry = g_ptr_array_index (entries, entry_idx);

624 625
	_LOGD (vtable->addr_family, LOG_ENTRY_FMT": remove %s (%u)", LOG_ENTRY_ARGS (entry_idx, entry),
	       vtable->platform_route_to_string (&entry->route.rx), (guint) entry->effective_metric);
626 627 628 629 630

	/* Remove the entry from the list (but don't free it yet) */
	g_ptr_array_index (entries, entry_idx) = NULL;
	g_ptr_array_remove_index (entries, entry_idx);

631
	_resync_all (vtable, self, NULL, entry, FALSE);
632 633 634 635 636 637 638 639 640 641 642 643 644

	_entry_free (entry);
}

/***********************************************************************************/

static void
_ipx_update_default_route (const VTableIP *vtable, NMDefaultRouteManager *self, gpointer source)
{
	NMDefaultRouteManagerPrivate *priv;
	Entry *entry;
	guint entry_idx;
	const NMPlatformIPRoute *default_route = NULL;
645
	NMPlatformIPXRoute rt;
646 647 648
	int ip_ifindex;
	GPtrArray *entries;
	NMDevice *device = NULL;
649 650
	NMVpnConnection *vpn = NULL;
	gboolean never_default = FALSE;
651
	gboolean synced = FALSE;
652 653 654 655

	g_return_if_fail (NM_IS_DEFAULT_ROUTE_MANAGER (self));
	if (NM_IS_DEVICE (source))
		device = source;
656 657
	else if (NM_IS_VPN_CONNECTION (source))
		vpn = source;
658 659 660
	else
		g_return_if_reached ();

661 662 663 664 665 666 667 668 669 670 671 672
	if (device)
		ip_ifindex = nm_device_get_ip_ifindex (device);
	else {
		ip_ifindex = nm_vpn_connection_get_ip_ifindex (vpn);

		if (ip_ifindex <= 0) {
			NMDevice *parent = nm_active_connection_get_device (NM_ACTIVE_CONNECTION (vpn));

			if (parent)
				ip_ifindex = nm_device_get_ip_ifindex (parent);
		}
	}
673 674 675 676 677 678 679

	priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);

	entries = vtable->get_entries (priv);
	entry = _entry_find_by_source (entries, source, &entry_idx);

	if (   entry
680
	    && entry->route.rx.ifindex != ip_ifindex) {
681 682 683
		/* Strange... the ifindex changed... Remove the device and start again. */
		_LOGD (vtable->addr_family, "ifindex of "LOG_ENTRY_FMT" changed: %d -> %d",
		       LOG_ENTRY_ARGS (entry_idx, entry),
684
		       entry->route.rx.ifindex, ip_ifindex);
685 686

		g_object_freeze_notify (G_OBJECT (self));
687
		_entry_at_idx_remove (vtable, self, entry_idx);
688 689 690 691 692 693 694 695
		g_assert (!_entry_find_by_source (entries, source, NULL));
		_ipx_update_default_route (vtable, self, source);
		g_object_thaw_notify (G_OBJECT (self));
		return;
	}

	/* get the @default_route from the device. */
	if (ip_ifindex > 0) {
696
		if (device) {
697 698
			gboolean is_assumed;

699
			if (VTABLE_IS_IP4)
700
				default_route = (const NMPlatformIPRoute *) nm_device_get_ip4_default_route (device, &is_assumed);
701
			else
702
				default_route = (const NMPlatformIPRoute *) nm_device_get_ip6_default_route (device, &is_assumed);
703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719
			if (!default_route && !is_assumed) {
				/* the device has no default route, but it is not assumed. That means, NMDefaultRouteManager
				 * enforces that the device has no default route.
				 *
				 * Hence we have to keep track of this entry, otherwise a missing entry tells us
				 * that the interface is assumed and NM would not remove the default routes on
				 * the device. */
				memset (&rt, 0, sizeof (rt));
				rt.rx.ifindex = ip_ifindex;
				rt.rx.source = NM_IP_CONFIG_SOURCE_UNKNOWN;
				rt.rx.metric = G_MAXUINT32;
				default_route = &rt.rx;

				never_default = TRUE;
				synced = TRUE;
			} else
				synced = default_route && !is_assumed;
720 721 722 723 724 725
		} else {
			NMConnection *connection = nm_active_connection_get_connection ((NMActiveConnection *) vpn);

			if (   connection
			    && nm_vpn_connection_get_vpn_state (vpn) == NM_VPN_CONNECTION_STATE_ACTIVATED) {

726
				memset (&rt, 0, sizeof (rt));
727 728 729 730 731 732
				if (VTABLE_IS_IP4) {
					NMIP4Config *vpn_config;

					vpn_config = nm_vpn_connection_get_ip4_config (vpn);
					if (vpn_config) {
						never_default = nm_ip4_config_get_never_default (vpn_config);
733 734 735 736 737 738
						rt.r4.ifindex = ip_ifindex;
						rt.r4.source = NM_IP_CONFIG_SOURCE_VPN;
						rt.r4.gateway = nm_vpn_connection_get_ip4_internal_gateway (vpn);
						rt.r4.metric = nm_vpn_connection_get_ip4_route_metric (vpn);
						rt.r4.mss = nm_ip4_config_get_mss (vpn_config);
						default_route = &rt.rx;
739 740 741 742 743 744 745 746 747
					}
				} else {
					NMIP6Config *vpn_config;

					vpn_config = nm_vpn_connection_get_ip6_config (vpn);
					if (vpn_config) {
						const struct in6_addr *int_gw = nm_vpn_connection_get_ip6_internal_gateway (vpn);

						never_default = nm_ip6_config_get_never_default (vpn_config);
748 749 750 751 752 753
						rt.r6.ifindex = ip_ifindex;
						rt.r6.source = NM_IP_CONFIG_SOURCE_VPN;
						rt.r6.gateway = int_gw ? *int_gw : in6addr_any;
						rt.r6.metric = nm_vpn_connection_get_ip6_route_metric (vpn);
						rt.r6.mss = nm_ip6_config_get_mss (vpn_config);
						default_route = &rt.rx;
754 755 756
					}
				}
			}
757
			synced = TRUE;
758
		}
759 760 761 762 763 764 765 766 767 768 769
	}
	g_assert (!default_route || default_route->plen == 0);

	if (!entry && !default_route)
		/* nothing to do */;
	else if (!entry) {
		/* add */
		entry = g_slice_new0 (Entry);
		entry->source.object = g_object_ref (source);

		if (VTABLE_IS_IP4)
770
			entry->route.r4 = *((const NMPlatformIP4Route *) default_route);
771
		else
772
			entry->route.r6 = *((const NMPlatformIP6Route *) default_route);
773 774

		/* only use normalized metrics */
775 776
		entry->route.rx.metric = vtable->route_metric_normalize (entry->route.rx.metric);
		entry->route.rx.ifindex = ip_ifindex;
777
		entry->never_default = never_default;
778
		entry->effective_metric = entry->route.rx.metric;
779 780 781
		entry->synced = synced;

		g_ptr_array_add (entries, entry);
782
		_entry_at_idx_update (vtable, self, entries->len - 1, NULL);
783 784 785 786 787 788
	} else if (default_route) {
		/* update */
		Entry old_entry, new_entry;

		new_entry = *entry;
		if (VTABLE_IS_IP4)
789
			new_entry.route.r4 = *((const NMPlatformIP4Route *) default_route);
790
		else
791
			new_entry.route.r6 = *((const NMPlatformIP6Route *) default_route);
792
		/* only use normalized metrics */
793 794
		new_entry.route.rx.metric = vtable->route_metric_normalize (new_entry.route.rx.metric);
		new_entry.route.rx.ifindex = ip_ifindex;
795
		new_entry.never_default = never_default;
796 797 798 799 800 801 802
		new_entry.synced = synced;

		if (memcmp (entry, &new_entry, sizeof (new_entry)) == 0)
			return;

		old_entry = *entry;
		*entry = new_entry;
803
		_entry_at_idx_update (vtable, self, entry_idx, &old_entry);
804 805
	} else {
		/* delete */
806
		_entry_at_idx_remove (vtable, self, entry_idx);
807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870
	}
}

void
nm_default_route_manager_ip4_update_default_route (NMDefaultRouteManager *self, gpointer source)
{
	_ipx_update_default_route (&vtable_ip4, self, source);
}

void
nm_default_route_manager_ip6_update_default_route (NMDefaultRouteManager *self, gpointer source)
{
	_ipx_update_default_route (&vtable_ip6, self, source);
}

/***********************************************************************************/

static gboolean
_ipx_connection_has_default_route (const VTableIP *vtable, NMDefaultRouteManager *self, NMConnection *connection)
{
	const char *method;
	NMSettingIPConfig *s_ip;

	g_return_val_if_fail (NM_IS_DEFAULT_ROUTE_MANAGER (self), FALSE);
	g_return_val_if_fail (NM_IS_CONNECTION (connection), FALSE);

	if (VTABLE_IS_IP4)
		s_ip = nm_connection_get_setting_ip4_config (connection);
	else
		s_ip = nm_connection_get_setting_ip6_config (connection);
	if (!s_ip || nm_setting_ip_config_get_never_default (s_ip))
		return FALSE;

	if (VTABLE_IS_IP4) {
		method = nm_utils_get_ip_config_method (connection, NM_TYPE_SETTING_IP4_CONFIG);
		if (   !method
		    || !strcmp (method, NM_SETTING_IP4_CONFIG_METHOD_DISABLED)
		    || !strcmp (method, NM_SETTING_IP4_CONFIG_METHOD_LINK_LOCAL))
			return FALSE;
	} else {
		method = nm_utils_get_ip_config_method (connection, NM_TYPE_SETTING_IP6_CONFIG);
		if (   !method
		    || !strcmp (method, NM_SETTING_IP6_CONFIG_METHOD_IGNORE)
		    || !strcmp (method, NM_SETTING_IP6_CONFIG_METHOD_LINK_LOCAL))
			return FALSE;
	}

	return TRUE;
}

gboolean
nm_default_route_manager_ip4_connection_has_default_route (NMDefaultRouteManager *self, NMConnection *connection)
{
	return _ipx_connection_has_default_route (&vtable_ip4, self, connection);
}

gboolean
nm_default_route_manager_ip6_connection_has_default_route (NMDefaultRouteManager *self, NMConnection *connection)
{
	return _ipx_connection_has_default_route (&vtable_ip6, self, connection);
}

/***********************************************************************************/

871
static NMDevice *
872
_ipx_get_best_device (const VTableIP *vtable, NMDefaultRouteManager *self, const GSList *devices)
873 874 875 876 877 878 879
{
	NMDefaultRouteManagerPrivate *priv;
	GPtrArray *entries;
	guint i;

	g_return_val_if_fail (NM_IS_DEFAULT_ROUTE_MANAGER (self), NULL);

880 881 882
	if (!devices)
		return NULL;

883 884 885 886 887 888 889 890 891
	priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);
	entries = vtable->get_entries (priv);

	for (i = 0; i < entries->len; i++) {
		Entry *entry = g_ptr_array_index (entries, i);

		if (!NM_IS_DEVICE (entry->source.pointer))
			continue;

892 893
		if (entry->never_default)
			continue;
894 895 896

		if (g_slist_find ((GSList *) devices, entry->source.device))
			return entry->source.pointer;
897 898 899 900 901
	}
	return NULL;
}

/** _ipx_get_best_activating_device:
902 903 904 905 906 907 908 909 910 911
 * @vtable: the virtual table
 * @self: #NMDefaultRouteManager
 * @devices: list of devices to be searched. Only devices from this list will be considered
 * @fully_activated: if #TRUE, only search for devices that are fully activated. Otherwise,
 *   search if there is a best device going to be activated. In the latter case, this will
 *   return NULL if the best device is already activated.
 * @preferred_device: if not-NULL, this device is preferred if there are more devices with
 *   the same priority.
 **/
static NMDevice *
912
_ipx_get_best_activating_device (const VTableIP *vtable, NMDefaultRouteManager *self, const GSList *devices, NMDevice *preferred_device)
913
{
914
	NMDefaultRouteManagerPrivate *priv;
915 916 917
	const GSList *iter;
	NMDevice *best_device = NULL;
	guint32 best_prio = G_MAXUINT32;
918
	NMDevice *best_activated_device;
919 920 921

	g_return_val_if_fail (NM_IS_DEFAULT_ROUTE_MANAGER (self), NULL);

922 923
	priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);

924
	best_activated_device = _ipx_get_best_device (vtable, self, devices);
925

926 927 928
	for (iter = devices; iter; iter = g_slist_next (iter)) {
		NMDevice *device = NM_DEVICE (iter->data);
		guint32 prio;
929
		Entry *entry;
930

931
		entry = _entry_find_by_source (vtable->get_entries (priv), device, NULL);
932

933 934 935 936 937 938 939 940
		if (entry) {
			/* of all the device that have an entry, we already know that best_activated_device
			 * is the best. entry cannot be better. */
			if (entry->source.device != best_activated_device)
				continue;
			prio = entry->effective_metric;
		} else {
			NMDeviceState state = nm_device_get_state (device);
941

942 943 944
			if (   state <= NM_DEVICE_STATE_DISCONNECTED
			    || state >= NM_DEVICE_STATE_DEACTIVATING)
				continue;
945

946 947
			if (!_ipx_connection_has_default_route (vtable, self, nm_device_get_connection (device)))
				continue;
948

949
			prio = nm_device_get_ip4_route_metric (device);
950
		}
951 952
		prio = vtable->route_metric_normalize (prio);

953 954 955 956 957
		if (   !best_device
		    || prio < best_prio
			|| (prio == best_prio && preferred_device == device)) {
			best_device = device;
			best_prio = prio;
958 959 960
		}
	}

961 962 963 964 965 966
	/* There's only a best activating device if the best device
	 * among all activating and already-activated devices is a
	 * still-activating one.
	 */
	if (best_device && nm_device_get_state (best_device) >= NM_DEVICE_STATE_SECONDARIES)
		return NULL;
967 968 969 970 971 972
	return best_device;
}

NMDevice *
nm_default_route_manager_ip4_get_best_device (NMDefaultRouteManager *self, const GSList *devices, gboolean fully_activated, NMDevice *preferred_device)
{
973
	if (fully_activated)
974
		return _ipx_get_best_device (&vtable_ip4, self, devices);
975 976
	else
		return _ipx_get_best_activating_device (&vtable_ip4, self, devices, preferred_device);
977 978 979 980 981
}

NMDevice *
nm_default_route_manager_ip6_get_best_device (NMDefaultRouteManager *self, const GSList *devices, gboolean fully_activated, NMDevice *preferred_device)
{
982
	if (fully_activated)
983
		return _ipx_get_best_device (&vtable_ip6, self, devices);
984 985
	else
		return _ipx_get_best_activating_device (&vtable_ip6, self, devices, preferred_device);
986 987 988 989
}

/***********************************************************************************/

990 991 992 993 994 995 996 997 998 999
static gpointer
_ipx_get_best_config (const VTableIP *vtable,
                      NMDefaultRouteManager *self,
                      gboolean ignore_never_default,
                      const char **out_ip_iface,
                      NMActiveConnection **out_ac,
                      NMDevice **out_device,
                      NMVpnConnection **out_vpn)
{
	NMDefaultRouteManagerPrivate *priv;
1000 1001
	GPtrArray *entries;
	guint i;
1002 1003 1004 1005
	gpointer config_result = NULL;

	g_return_val_if_fail (NM_IS_DEFAULT_ROUTE_MANAGER (self), NULL);

1006 1007 1008 1009 1010 1011 1012 1013 1014
	if (out_ip_iface)
		*out_ip_iface = NULL;
	if (out_ac)
		*out_ac = NULL;
	if (out_device)
		*out_device = NULL;
	if (out_vpn)
		*out_vpn = NULL;

1015 1016
	priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);

1017
	g_return_val_if_fail (NM_IS_DEFAULT_ROUTE_MANAGER (self), NULL);
1018

1019 1020
	priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);
	entries = vtable->get_entries (priv);
1021

1022 1023
	for (i = 0; i < entries->len; i++) {
		Entry *entry = g_ptr_array_index (entries, i);
1024

1025 1026
		if (!NM_IS_DEVICE (entry->source.pointer)) {
			NMVpnConnection *vpn = NM_VPN_CONNECTION (entry->source.vpn);
1027

1028
			if (entry->never_default && !ignore_never_default)
1029 1030
				continue;

1031 1032 1033 1034 1035
			if (VTABLE_IS_IP4)
				config_result = nm_vpn_connection_get_ip4_config (vpn);
			else
				config_result = nm_vpn_connection_get_ip6_config (vpn);
			g_assert (config_result);
1036

1037 1038 1039 1040 1041 1042
			if (out_vpn)
				*out_vpn = vpn;
			if (out_ac)
				*out_ac = NM_ACTIVE_CONNECTION (vpn);
			if (out_ip_iface)
				*out_ip_iface = nm_vpn_connection_get_ip_iface (vpn);
1043
		} else {
1044 1045
			NMDevice *device = entry->source.device;
			NMActRequest *req;
1046

1047 1048 1049
			if (entry->never_default)
				continue;

1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064
			if (VTABLE_IS_IP4)
				config_result = nm_device_get_ip4_config (device);
			else
				config_result = nm_device_get_ip6_config (device);
			g_assert (config_result);
			req = nm_device_get_act_request (device);
			g_assert (req);

			if (out_device)
				*out_device = device;
			if (out_ac)
				*out_ac = NM_ACTIVE_CONNECTION (req);
			if (out_ip_iface)
				*out_ip_iface = nm_device_get_ip_iface (device);
		}
1065
		break;
1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106
	}

	return config_result;
}

NMIP4Config *
nm_default_route_manager_ip4_get_best_config (NMDefaultRouteManager *self,
                                              gboolean ignore_never_default,
                                              const char **out_ip_iface,
                                              NMActiveConnection **out_ac,
                                              NMDevice **out_device,
                                              NMVpnConnection **out_vpn)
{
	return _ipx_get_best_config (&vtable_ip4,
	                             self,
	                             ignore_never_default,
	                             out_ip_iface,
	                             out_ac,
	                             out_device,
	                             out_vpn);
}

NMIP6Config *
nm_default_route_manager_ip6_get_best_config (NMDefaultRouteManager *self,
                                              gboolean ignore_never_default,
                                              const char **out_ip_iface,
                                              NMActiveConnection **out_ac,
                                              NMDevice **out_device,
                                              NMVpnConnection **out_vpn)
{
	return _ipx_get_best_config (&vtable_ip6,
	                             self,
	                             ignore_never_default,
	                             out_ip_iface,
	                             out_ac,
	                             out_device,
	                             out_vpn);
}

/***********************************************************************************/

1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140
static GPtrArray *
_v4_get_entries (NMDefaultRouteManagerPrivate *priv)
{
	return priv->entries_ip4;
}

static GPtrArray *
_v6_get_entries (NMDefaultRouteManagerPrivate *priv)
{
	return priv->entries_ip6;
}

static gboolean
_v4_platform_route_delete_default (int ifindex, guint32 metric)
{
	return nm_platform_ip4_route_delete (ifindex, 0, 0, metric);
}

static gboolean
_v6_platform_route_delete_default (int ifindex, guint32 metric)
{
	return nm_platform_ip6_route_delete (ifindex, in6addr_any, 0, metric);
}

static guint32
_v4_route_metric_normalize (guint32 metric)
{
	return metric;
}

static const VTableIP vtable_ip4 = {
	.addr_family                    = AF_INET,
	.get_entries                    = _v4_get_entries,
	.platform_route_to_string       = (const char *(*)(const NMPlatformIPRoute *)) nm_platform_ip4_route_to_string,
1141
	.platform_route_get_all         = nm_platform_ip4_route_get_all,
1142 1143 1144 1145 1146 1147 1148 1149
	.platform_route_delete_default  = _v4_platform_route_delete_default,
	.route_metric_normalize         = _v4_route_metric_normalize,
};

static const VTableIP vtable_ip6 = {
	.addr_family                    = AF_INET6,
	.get_entries                    = _v6_get_entries,
	.platform_route_to_string       = (const char *(*)(const NMPlatformIPRoute *)) nm_platform_ip6_route_to_string,
1150
	.platform_route_get_all         = nm_platform_ip6_route_get_all,
1151 1152 1153 1154 1155 1156 1157 1158 1159
	.platform_route_delete_default  = _v6_platform_route_delete_default,
	.route_metric_normalize         = nm_utils_ip6_route_metric_normalize,
};

/***********************************************************************************/

NMDefaultRouteManager *
nm_default_route_manager_get ()
{
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	if (G_UNLIKELY (!singleton_instance)) {
		singleton_instance = NM_DEFAULT_ROUTE_MANAGER (g_object_new (NM_TYPE_DEFAULT_ROUTE_MANAGER, NULL));
		g_object_add_weak_pointer (G_OBJECT (singleton_instance), (gpointer *) &singleton_instance);
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	}
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	return singleton_instance;
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}

/***********************************************************************************/

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static gboolean
_resync_idle_now (NMDefaultRouteManager *self)
{
	gboolean has_v4_changes, has_v6_changes;
	gboolean changed = FALSE;

	NMDefaultRouteManagerPrivate *priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);

	has_v4_changes = priv->resync.has_v4_changes;
	has_v6_changes = priv->resync.has_v6_changes;

	_LOGD (0, "resync: sync now (%u) (IPv4 changes: %s, IPv6 changes: %s)", priv->resync.idle_handle,
	       has_v4_changes ? "yes" : "no", has_v6_changes ? "yes" : "no");

	priv->resync.has_v4_changes = FALSE;
	priv->resync.has_v6_changes = FALSE;
	priv->resync.idle_handle = 0;
	priv->resync.backoff_wait_time_ms =
	    priv->resync.backoff_wait_time_ms == 0
	    ? 100
	    : priv->resync.backoff_wait_time_ms * 2;

	if (has_v4_changes)
		changed |= _resync_all (&vtable_ip4, self, NULL, NULL, TRUE);

	if (has_v6_changes)
		changed |= _resync_all (&vtable_ip6, self, NULL, NULL, TRUE);

	if (!changed) {
		/* Nothing changed: reset the backoff wait time */
		_resync_idle_cancel (self);
	}

	return G_SOURCE_REMOVE;
}

static void
_resync_idle_cancel (NMDefaultRouteManager *self)
{
	NMDefaultRouteManagerPrivate *priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);

	if (priv->resync.idle_handle) {
		_LOGD (0, "resync: cancelled (%u)", priv->resync.idle_handle);
		g_source_remove (priv->resync.idle_handle);
		priv->resync.idle_handle = 0;
	}
	priv->resync.backoff_wait_time_ms = 0;
	priv->resync.has_v4_changes = FALSE;
	priv->resync.has_v6_changes = FALSE;
}

static void
_resync_idle_reschedule (NMDefaultRouteManager *self)
{
	NMDefaultRouteManagerPrivate *priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);

	/* since we react on external changes and readd/remove default routes for
	 * the interfaces we manage, there could be the erronous situation where two applications
	 * fight over a certain default route.
	 * Avoid this, by increasingly wait longer to touch the system (backoff wait time). */

	if (priv->resync.backoff_wait_time_ms == 0) {
		/* for scheduling idle, always reschedule (to process all other events first) */
		if (priv->resync.idle_handle)
			g_source_remove (priv->resync.idle_handle);
		else
			_LOGD (0, "resync: schedule on idle");
		priv->resync.idle_handle = g_idle_add ((GSourceFunc) _resync_idle_now, self);
	} else if (!priv->resync.idle_handle) {
		priv->resync.idle_handle =  g_timeout_add (priv->resync.backoff_wait_time_ms, (GSourceFunc) _resync_idle_now, self);
		_LOGD (0, "resync: schedule in %u.%03u seconds (%u)", priv->resync.backoff_wait_time_ms/1000,
		       priv->resync.backoff_wait_time_ms%1000, priv->resync.idle_handle);
	}
}

static void
_platform_ipx_route_changed_cb (const VTableIP *vtable,
                                NMDefaultRouteManager *self,
                                const NMPlatformIPRoute *route)
{
	NMDefaultRouteManagerPrivate *priv;

	if (route && !NM_PLATFORM_IP_ROUTE_IS_DEFAULT (route)) {
		/* we only care about address changes or changes of default route. */
		return;
	}

	priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);

	if (priv->resync.guard) {
		/* callbacks while executing _resync_all() are ignored. */
		return;
	}

	if (VTABLE_IS_IP4)
		priv->resync.has_v4_changes = TRUE;
	else
		priv->resync.has_v6_changes = TRUE;

	_resync_idle_reschedule (self);
}

static void
_platform_ip4_address_changed_cb (NMPlatform *platform,
                                  int ifindex,
                                  gpointer platform_object,
                                  NMPlatformSignalChangeType change_type,
                                  NMPlatformReason reason,
                                  NMDefaultRouteManager *self)
{
	_platform_ipx_route_changed_cb (&vtable_ip4, self, NULL);
}

static void
_platform_ip6_address_changed_cb (NMPlatform *platform,
                                  int ifindex,
                                  gpointer platform_object,
                                  NMPlatformSignalChangeType change_type,
                                  NMPlatformReason reason,
                                  NMDefaultRouteManager *self)
{
	_platform_ipx_route_changed_cb (&vtable_ip6, self, NULL);
}

static void
_platform_ip4_route_changed_cb (NMPlatform *platform,
                                int ifindex,
                                gpointer platform_object,
                                NMPlatformSignalChangeType change_type,
                                NMPlatformReason reason,
                                NMDefaultRouteManager *self)
{
	_platform_ipx_route_changed_cb (&vtable_ip4, self, platform_object);
}

static void
_platform_ip6_route_changed_cb (NMPlatform *platform,
                                int ifindex,
                                gpointer platform_object,
                                NMPlatformSignalChangeType change_type,
                                NMPlatformReason reason,
                                NMDefaultRouteManager *self)
{
	_platform_ipx_route_changed_cb (&vtable_ip6, self, platform_object);
}

/***********************************************************************************/

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static void
nm_default_route_manager_init (NMDefaultRouteManager *self)
{
	NMDefaultRouteManagerPrivate *priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);
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	NMPlatform *platform;
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	priv->entries_ip4 = g_ptr_array_new_full (0, (GDestroyNotify) _entry_free);
	priv->entries_ip6 = g_ptr_array_new_full (0, (GDestroyNotify) _entry_free);
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	platform = nm_platform_get ();
	g_signal_connect (platform, NM_PLATFORM_SIGNAL_IP4_ADDRESS_CHANGED, G_CALLBACK (_platform_ip4_address_changed_cb), self);
	g_signal_connect (platform, NM_PLATFORM_SIGNAL_IP6_ADDRESS_CHANGED, G_CALLBACK (_platform_ip6_address_changed_cb), self);
	g_signal_connect (platform, NM_PLATFORM_SIGNAL_IP4_ROUTE_CHANGED, G_CALLBACK (_platform_ip4_route_changed_cb), self);
	g_signal_connect (platform, NM_PLATFORM_SIGNAL_IP6_ROUTE_CHANGED, G_CALLBACK (_platform_ip6_route_changed_cb), self);
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}

static void
dispose (GObject *object)
{
	NMDefaultRouteManager *self = NM_DEFAULT_ROUTE_MANAGER (object);
	NMDefaultRouteManagerPrivate *priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);

	if (priv->entries_ip4) {
		g_ptr_array_free (priv->entries_ip4, TRUE);
		priv->entries_ip4 = NULL;
	}
	if (priv->entries_ip6) {
		g_ptr_array_free (priv->entries_ip6, TRUE);
		priv->entries_ip6 = NULL;
	}

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	_resync_idle_cancel (self);

	g_signal_handlers_disconnect_by_data (nm_platform_get (), self);

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	G_OBJECT_CLASS (nm_default_route_manager_parent_class)->dispose (object);
}

static void
nm_default_route_manager_class_init (NMDefaultRouteManagerClass *klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS (klass);

	g_type_class_add_private (klass, sizeof (NMDefaultRouteManagerPrivate));

	/* virtual methods */
	object_class->dispose = dispose;
}