nm-default-route-manager.c 41.9 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)

static NMDefaultRouteManager *_instance;

#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"; \
            \
            if ((self) != _instance) \
                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__)

#define LOG_ENTRY_FMT  "entry[%u/%s:%p:%s]"
#define LOG_ENTRY_ARGS(entry_idx, entry) \
		entry_idx, \
		NM_IS_DEVICE (entry->source.pointer) ? "dev" : "vpn", \
		entry->source.pointer, \
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		NM_IS_DEVICE (entry->source.pointer) ? nm_device_get_iface (entry->source.device) : nm_vpn_connection_get_connection_id (entry->source.vpn)
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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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	gboolean synced; /* if true, we synced the entry to platform. We don't sync assumed devices */
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	/* it makes sense to order sources based on their priority, without
	 * actually adding a default route. This is useful to decide which
	 * DNS server to prefer. never_default entries are not synced to platform. */
	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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		                                     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)
{
	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->never_default)
				continue;

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			if (   e->route.rx.ifindex == route->ifindex
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			    && e->synced) {
				has_ifindex_synced = TRUE;
				if (e->effective_metric == route->metric)
					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 (has_ifindex_synced && !entry) {
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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);

			if (   !e->never_default
			    && e->synced
			    && 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 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;
	GHashTableIter iter;
	gpointer ptr;
	GHashTable *changed_metrics = g_hash_table_new (NULL, NULL);
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	GHashTable *assumed_metrics;
	GArray *routes;
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	gboolean changed = FALSE;

	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) {
		/* The old version obviously changed. */
		g_hash_table_add (changed_metrics, GUINT_TO_POINTER (old_entry->effective_metric));
	}

	/* 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);

				if (   !e->never_default
				    && e->synced
					&& 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. */
			g_hash_table_add (changed_metrics, GUINT_TO_POINTER (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) {
			g_hash_table_add (changed_metrics, GUINT_TO_POINTER (entry->effective_metric));
			g_hash_table_add (changed_metrics, GUINT_TO_POINTER (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)) {
				g_hash_table_add (changed_metrics, GUINT_TO_POINTER (entry->effective_metric));
				_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_hash_table_iter_init (&iter, changed_metrics);
	while (g_hash_table_iter_next (&iter, &ptr, NULL))
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		changed |= _platform_route_sync_add (vtable, self, GPOINTER_TO_UINT (ptr));
	changed |= _platform_route_sync_flush (vtable, self);
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	g_hash_table_unref (changed_metrics);
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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
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	          || (entry->source.pointer == old_entry->source.pointer && entry->route.rx.ifindex == old_entry->route.rx.ifindex));
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	if (!entry->synced) {
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		entry->effective_metric = entry->route.rx.metric;
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		_LOGD (vtable->addr_family, LOG_ENTRY_FMT": %s %s%s",
		       LOG_ENTRY_ARGS (entry_idx, entry),
		       old_entry ? "update" : "add",
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		       vtable->platform_route_to_string (&entry->route.rx),
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		       entry->never_default ? " (never-default)" : (entry->synced ? "" : " (not synced)"));
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	}

	g_ptr_array_sort_with_data (entries, _sort_entries_cmp, NULL);

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	_resync_all (vtable, self, entry, old_entry, FALSE);
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}

static void
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_entry_at_idx_remove (const VTableIP *vtable, NMDefaultRouteManager *self, guint entry_idx)
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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);

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	_LOGD (vtable->addr_family, LOG_ENTRY_FMT": remove %s (%u%s)", LOG_ENTRY_ARGS (entry_idx, entry),
	       vtable->platform_route_to_string (&entry->route.rx), (guint) entry->effective_metric,
	       entry->synced ? "" : ", not synced");
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	/* 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);

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	_resync_all (vtable, self, NULL, entry, FALSE);
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	_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;
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	NMPlatformIPXRoute rt;
597 598 599
	int ip_ifindex;
	GPtrArray *entries;
	NMDevice *device = NULL;
600 601
	NMVpnConnection *vpn = NULL;
	gboolean never_default = FALSE;
602
	gboolean synced;
603
	gboolean is_assumed = FALSE;
604 605 606 607

	g_return_if_fail (NM_IS_DEFAULT_ROUTE_MANAGER (self));
	if (NM_IS_DEVICE (source))
		device = source;
608 609
	else if (NM_IS_VPN_CONNECTION (source))
		vpn = source;
610 611 612
	else
		g_return_if_reached ();

613 614 615 616 617 618 619 620 621 622 623 624
	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);
		}
	}
625 626 627 628 629 630 631

	priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);

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

	if (   entry
632
	    && entry->route.rx.ifindex != ip_ifindex) {
633 634 635
		/* 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),
636
		       entry->route.rx.ifindex, ip_ifindex);
637 638

		g_object_freeze_notify (G_OBJECT (self));
639
		_entry_at_idx_remove (vtable, self, entry_idx);
640 641 642 643 644 645 646 647
		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) {
648 649
		if (device) {
			if (VTABLE_IS_IP4)
650
				default_route = (const NMPlatformIPRoute *) nm_device_get_ip4_default_route (device, &is_assumed);
651
			else
652
				default_route = (const NMPlatformIPRoute *) nm_device_get_ip6_default_route (device, &is_assumed);
653 654 655 656 657 658
		} else {
			NMConnection *connection = nm_active_connection_get_connection ((NMActiveConnection *) vpn);

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

659
				memset (&rt, 0, sizeof (rt));
660 661 662 663 664 665
				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);
666 667 668 669 670 671
						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;
672 673 674 675 676 677 678 679 680
					}
				} 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);
681 682 683 684 685 686
						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;
687 688 689 690
					}
				}
			}
		}
691 692 693
	}
	g_assert (!default_route || default_route->plen == 0);

694 695
	/* if the source is never_default or the device uses an assumed connection,
	 * we don't sync the route. */
696
	synced = !never_default && !is_assumed;
697 698 699 700 701 702 703 704 705

	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)
706
			entry->route.r4 = *((const NMPlatformIP4Route *) default_route);
707
		else
708
			entry->route.r6 = *((const NMPlatformIP6Route *) default_route);
709 710

		/* only use normalized metrics */
711 712
		entry->route.rx.metric = vtable->route_metric_normalize (entry->route.rx.metric);
		entry->route.rx.ifindex = ip_ifindex;
713
		entry->never_default = never_default;
714
		entry->effective_metric = entry->route.rx.metric;
715 716 717
		entry->synced = synced;

		g_ptr_array_add (entries, entry);
718
		_entry_at_idx_update (vtable, self, entries->len - 1, NULL);
719 720 721 722 723 724
	} else if (default_route) {
		/* update */
		Entry old_entry, new_entry;

		new_entry = *entry;
		if (VTABLE_IS_IP4)
725
			new_entry.route.r4 = *((const NMPlatformIP4Route *) default_route);
726
		else
727
			new_entry.route.r6 = *((const NMPlatformIP6Route *) default_route);
728
		/* only use normalized metrics */
729 730
		new_entry.route.rx.metric = vtable->route_metric_normalize (new_entry.route.rx.metric);
		new_entry.route.rx.ifindex = ip_ifindex;
731
		new_entry.never_default = never_default;
732 733 734 735 736 737 738
		new_entry.synced = synced;

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

		old_entry = *entry;
		*entry = new_entry;
739
		_entry_at_idx_update (vtable, self, entry_idx, &old_entry);
740 741
	} else {
		/* delete */
742
		_entry_at_idx_remove (vtable, self, entry_idx);
743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806
	}
}

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);
}

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

807
static NMDevice *
808
_ipx_get_best_device (const VTableIP *vtable, NMDefaultRouteManager *self, const GSList *devices)
809 810 811 812 813 814 815
{
	NMDefaultRouteManagerPrivate *priv;
	GPtrArray *entries;
	guint i;

	g_return_val_if_fail (NM_IS_DEFAULT_ROUTE_MANAGER (self), NULL);

816 817 818
	if (!devices)
		return NULL;

819 820 821 822 823 824 825 826 827 828
	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;

		g_assert (!entry->never_default);
829 830 831

		if (g_slist_find ((GSList *) devices, entry->source.device))
			return entry->source.pointer;
832 833 834 835 836
	}
	return NULL;
}

/** _ipx_get_best_activating_device:
837 838 839 840 841 842 843 844 845 846
 * @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 *
847
_ipx_get_best_activating_device (const VTableIP *vtable, NMDefaultRouteManager *self, const GSList *devices, NMDevice *preferred_device)
848
{
849
	NMDefaultRouteManagerPrivate *priv;
850 851 852
	const GSList *iter;
	NMDevice *best_device = NULL;
	guint32 best_prio = G_MAXUINT32;
853
	NMDevice *best_activated_device;
854 855 856

	g_return_val_if_fail (NM_IS_DEFAULT_ROUTE_MANAGER (self), NULL);

857 858
	priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);

859
	best_activated_device = _ipx_get_best_device (vtable, self, devices);
860

861 862 863
	for (iter = devices; iter; iter = g_slist_next (iter)) {
		NMDevice *device = NM_DEVICE (iter->data);
		guint32 prio;
864
		Entry *entry;
865

866
		entry = _entry_find_by_source (vtable->get_entries (priv), device, NULL);
867

868 869 870 871 872 873 874 875
		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);
876

877 878 879
			if (   state <= NM_DEVICE_STATE_DISCONNECTED
			    || state >= NM_DEVICE_STATE_DEACTIVATING)
				continue;
880

881 882
			if (!_ipx_connection_has_default_route (vtable, self, nm_device_get_connection (device)))
				continue;
883

884
			prio = nm_device_get_ip4_route_metric (device);
885
		}
886 887
		prio = vtable->route_metric_normalize (prio);

888 889 890 891 892
		if (   !best_device
		    || prio < best_prio
			|| (prio == best_prio && preferred_device == device)) {
			best_device = device;
			best_prio = prio;
893 894 895
		}
	}

896 897 898 899 900 901
	/* 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;
902 903 904 905 906 907
	return best_device;
}

NMDevice *
nm_default_route_manager_ip4_get_best_device (NMDefaultRouteManager *self, const GSList *devices, gboolean fully_activated, NMDevice *preferred_device)
{
908
	if (fully_activated)
909
		return _ipx_get_best_device (&vtable_ip4, self, devices);
910 911
	else
		return _ipx_get_best_activating_device (&vtable_ip4, self, devices, preferred_device);
912 913 914 915 916
}

NMDevice *
nm_default_route_manager_ip6_get_best_device (NMDefaultRouteManager *self, const GSList *devices, gboolean fully_activated, NMDevice *preferred_device)
{
917
	if (fully_activated)
918
		return _ipx_get_best_device (&vtable_ip6, self, devices);
919 920
	else
		return _ipx_get_best_activating_device (&vtable_ip6, self, devices, preferred_device);
921 922 923 924
}

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

925 926 927 928 929 930 931 932 933 934
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;
935 936
	GPtrArray *entries;
	guint i;
937 938 939 940
	gpointer config_result = NULL;

	g_return_val_if_fail (NM_IS_DEFAULT_ROUTE_MANAGER (self), NULL);

941 942 943 944 945 946 947 948 949
	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;

950 951
	priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);

952
	g_return_val_if_fail (NM_IS_DEFAULT_ROUTE_MANAGER (self), NULL);
953

954 955
	priv = NM_DEFAULT_ROUTE_MANAGER_GET_PRIVATE (self);
	entries = vtable->get_entries (priv);
956

957 958
	for (i = 0; i < entries->len; i++) {
		Entry *entry = g_ptr_array_index (entries, i);
959

960 961
		if (!NM_IS_DEVICE (entry->source.pointer)) {
			NMVpnConnection *vpn = NM_VPN_CONNECTION (entry->source.vpn);
962

963
			if (entry->never_default && !ignore_never_default)
964 965
				continue;

966 967 968 969 970
			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);
971

972 973 974 975 976 977
			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);
978
		} else {
979 980
			NMDevice *device = entry->source.device;
			NMActRequest *req;
981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996

			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);
		}
997
		break;
998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038
	}

	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);
}

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

1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072
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,
1073
	.platform_route_get_all         = nm_platform_ip4_route_get_all,
1074 1075 1076 1077 1078 1079 1080 1081
	.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,
1082
	.platform_route_get_all         = nm_platform_ip6_route_get_all,
1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100
	.platform_route_delete_default  = _v6_platform_route_delete_default,
	.route_metric_normalize         = nm_utils_ip6_route_metric_normalize,
};

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

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

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

1101 1102 1103 1104 1105 1106 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 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248
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;
}