/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2007 - 2017 Red Hat, Inc.
 * Copyright (C) 2007 - 2008 Novell, Inc.
 */

#include "libnm-core-impl/nm-default-libnm-core.h"

#include "nm-setting-ip-config.h"

#include <arpa/inet.h>
#include <linux/fib_rules.h>

#include "libnm-base/nm-net-aux.h"
#include "libnm-glib-aux/nm-str-buf.h"
#include "nm-setting-ip4-config.h"
#include "nm-setting-ip6-config.h"
#include "nm-utils.h"
#include "nm-setting-private.h"
#include "nm-utils-private.h"

/**
 * SECTION:nm-setting-ip-config
 * @short_description: Abstract base class for IPv4 and IPv6
 *   addressing, routing, and name service properties
 * @include: nm-setting-ip-config.h
 * @see_also: #NMSettingIP4Config, #NMSettingIP6Config
 *
 * #NMSettingIPConfig is the abstract base class of
 * #NMSettingIP4Config and #NMSettingIP6Config, providing properties
 * related to IP addressing, routing, and Domain Name Service.
 **/

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

const NMUtilsDNSOptionDesc _nm_utils_dns_option_descs[] = {
    {NM_SETTING_DNS_OPTION_DEBUG, FALSE, FALSE},
    {NM_SETTING_DNS_OPTION_NDOTS, TRUE, FALSE},
    {NM_SETTING_DNS_OPTION_TIMEOUT, TRUE, FALSE},
    {NM_SETTING_DNS_OPTION_ATTEMPTS, TRUE, FALSE},
    {NM_SETTING_DNS_OPTION_ROTATE, FALSE, FALSE},
    {NM_SETTING_DNS_OPTION_NO_CHECK_NAMES, FALSE, FALSE},
    {NM_SETTING_DNS_OPTION_INET6, FALSE, TRUE},
    {NM_SETTING_DNS_OPTION_IP6_BYTESTRING, FALSE, TRUE},
    {NM_SETTING_DNS_OPTION_IP6_DOTINT, FALSE, TRUE},
    {NM_SETTING_DNS_OPTION_NO_IP6_DOTINT, FALSE, TRUE},
    {NM_SETTING_DNS_OPTION_EDNS0, FALSE, FALSE},
    {NM_SETTING_DNS_OPTION_SINGLE_REQUEST, FALSE, FALSE},
    {NM_SETTING_DNS_OPTION_SINGLE_REQUEST_REOPEN, FALSE, FALSE},
    {NM_SETTING_DNS_OPTION_NO_TLD_QUERY, FALSE, FALSE},
    {NM_SETTING_DNS_OPTION_USE_VC, FALSE, FALSE},
    {NM_SETTING_DNS_OPTION_NO_RELOAD, FALSE, FALSE},
    {NM_SETTING_DNS_OPTION_TRUST_AD, FALSE, FALSE},
    {NULL, FALSE, FALSE}};

static char *
canonicalize_ip(int family, const char *ip, gboolean null_any)
{
    guint8 addr_bytes[sizeof(struct in6_addr)];
    char   addr_str[NM_UTILS_INET_ADDRSTRLEN];
    int    ret;

    if (!ip) {
        if (null_any)
            return NULL;
        if (family == AF_INET)
            return g_strdup("0.0.0.0");
        if (family == AF_INET6)
            return g_strdup("::");
        g_return_val_if_reached(NULL);
    }

    ret = inet_pton(family, ip, addr_bytes);
    g_return_val_if_fail(ret == 1, NULL);

    if (null_any) {
        if (!memcmp(addr_bytes, &in6addr_any, nm_utils_addr_family_to_size(family)))
            return NULL;
    }

    return g_strdup(inet_ntop(family, addr_bytes, addr_str, sizeof(addr_str)));
}

static char *
canonicalize_ip_binary(int family, gconstpointer ip, gboolean null_any)
{
    char string[NM_UTILS_INET_ADDRSTRLEN];

    if (!ip) {
        if (null_any)
            return NULL;
        if (family == AF_INET)
            return g_strdup("0.0.0.0");
        if (family == AF_INET6)
            return g_strdup("::");
        g_return_val_if_reached(NULL);
    }
    if (null_any) {
        if (!memcmp(ip, &in6addr_any, nm_utils_addr_family_to_size(family)))
            return NULL;
    }
    return g_strdup(inet_ntop(family, ip, string, sizeof(string)));
}

static gboolean
valid_ip(int family, const char *ip, GError **error)
{
    if (!ip) {
        g_set_error(error,
                    NM_CONNECTION_ERROR,
                    NM_CONNECTION_ERROR_FAILED,
                    family == AF_INET ? _("Missing IPv4 address") : _("Missing IPv6 address"));
        return FALSE;
    }
    if (!nm_utils_ipaddr_is_valid(family, ip)) {
        g_set_error(error,
                    NM_CONNECTION_ERROR,
                    NM_CONNECTION_ERROR_FAILED,
                    family == AF_INET ? _("Invalid IPv4 address '%s'")
                                      : _("Invalid IPv6 address '%s'"),
                    ip);
        return FALSE;
    } else
        return TRUE;
}

static gboolean
valid_prefix(int family, guint prefix, GError **error)
{
    if ((family == AF_INET && prefix <= 32) || (family == AF_INET6 && prefix <= 128))
        return TRUE;

    g_set_error(error,
                NM_CONNECTION_ERROR,
                NM_CONNECTION_ERROR_FAILED,
                family == AF_INET ? _("Invalid IPv4 address prefix '%u'")
                                  : _("Invalid IPv6 address prefix '%u'"),
                prefix);
    return FALSE;
}

static gboolean
valid_metric(gint64 metric, GError **error)
{
    if (metric < -1 || metric > G_MAXUINT32) {
        if (error) {
            char buf[64];

            /* We can't concatenate G_GINT64_FORMAT into a translatable string */
            g_snprintf(buf, sizeof(buf), "%" G_GINT64_FORMAT, metric);
            g_set_error(error,
                        NM_CONNECTION_ERROR,
                        NM_CONNECTION_ERROR_FAILED,
                        _("Invalid routing metric '%s'"),
                        buf);
        }
        return FALSE;
    }

    return TRUE;
}

/*****************************************************************************
 * NMIPAddress
 *****************************************************************************/

G_DEFINE_BOXED_TYPE(NMIPAddress, nm_ip_address, nm_ip_address_dup, nm_ip_address_unref)

struct NMIPAddress {
    guint refcount;

    char *address;
    int   prefix, family;

    GHashTable *attributes;
};

/**
 * nm_ip_address_new:
 * @family: the IP address family (<literal>AF_INET</literal> or
 *   <literal>AF_INET6</literal>)
 * @addr: the IP address
 * @prefix: the address prefix length
 * @error: location to store error, or %NULL
 *
 * Creates a new #NMIPAddress object.
 *
 * Returns: (transfer full): the new #NMIPAddress object, or %NULL on error
 **/
NMIPAddress *
nm_ip_address_new(int family, const char *addr, guint prefix, GError **error)
{
    NMIPAddress *address;

    g_return_val_if_fail(family == AF_INET || family == AF_INET6, NULL);
    g_return_val_if_fail(addr != NULL, NULL);

    if (!valid_ip(family, addr, error))
        return NULL;
    if (!valid_prefix(family, prefix, error))
        return NULL;

    address           = g_slice_new0(NMIPAddress);
    address->refcount = 1;

    address->family  = family;
    address->address = canonicalize_ip(family, addr, FALSE);
    address->prefix  = prefix;

    return address;
}

/**
 * nm_ip_address_new_binary:
 * @family: the IP address family (<literal>AF_INET</literal> or
 *   <literal>AF_INET6</literal>)
 * @addr: the IP address
 * @prefix: the address prefix length
 * @error: location to store error, or %NULL
 *
 * Creates a new #NMIPAddress object. @addr must point to a buffer of the
 * correct size for @family.
 *
 * Returns: (transfer full): the new #NMIPAddress object, or %NULL on error
 **/
NMIPAddress *
nm_ip_address_new_binary(int family, gconstpointer addr, guint prefix, GError **error)
{
    NMIPAddress *address;
    char         string[NM_UTILS_INET_ADDRSTRLEN];

    g_return_val_if_fail(family == AF_INET || family == AF_INET6, NULL);
    g_return_val_if_fail(addr != NULL, NULL);

    if (!valid_prefix(family, prefix, error))
        return NULL;

    address           = g_slice_new0(NMIPAddress);
    address->refcount = 1;

    address->family  = family;
    address->address = g_strdup(inet_ntop(family, addr, string, sizeof(string)));
    address->prefix  = prefix;

    return address;
}

/**
 * nm_ip_address_ref:
 * @address: the #NMIPAddress
 *
 * Increases the reference count of the object.
 **/
void
nm_ip_address_ref(NMIPAddress *address)
{
    g_return_if_fail(address != NULL);
    g_return_if_fail(address->refcount > 0);

    address->refcount++;
}

/**
 * nm_ip_address_unref:
 * @address: the #NMIPAddress
 *
 * Decreases the reference count of the object.  If the reference count
 * reaches zero, the object will be destroyed.
 **/
void
nm_ip_address_unref(NMIPAddress *address)
{
    g_return_if_fail(address != NULL);
    g_return_if_fail(address->refcount > 0);

    address->refcount--;
    if (address->refcount == 0) {
        g_free(address->address);
        if (address->attributes)
            g_hash_table_unref(address->attributes);
        g_slice_free(NMIPAddress, address);
    }
}

/**
 * nm_ip_address_cmp_full:
 * @a: the #NMIPAddress
 * @b: the #NMIPAddress to compare @address to.
 * @cmp_flags: the #NMIPAddressCmpFlags that indicate what to compare.
 *
 * Note that with @cmp_flags #NM_IP_ADDRESS_CMP_FLAGS_WITH_ATTRS, there
 * is no total order for comparing GVariant. That means, if the two addresses
 * only differ by their attributes, the sort order is undefined and the return
 * value only indicates equality.
 *
 * Returns: 0 if the two objects have the same values (according to their flags)
 *   or a integer indicating the compare order.
 **/
int
nm_ip_address_cmp_full(const NMIPAddress *a, const NMIPAddress *b, NMIPAddressCmpFlags cmp_flags)
{
    g_return_val_if_fail(!a || a->refcount > 0, 0);
    g_return_val_if_fail(!b || b->refcount > 0, 0);
    g_return_val_if_fail(!NM_FLAGS_ANY(cmp_flags, ~NM_IP_ADDRESS_CMP_FLAGS_WITH_ATTRS), 0);

    NM_CMP_SELF(a, b);

    NM_CMP_FIELD(a, b, family);
    NM_CMP_FIELD(a, b, prefix);
    NM_CMP_FIELD_STR(a, b, address);

    if (NM_FLAGS_HAS(cmp_flags, NM_IP_ADDRESS_CMP_FLAGS_WITH_ATTRS)) {
        GHashTableIter iter;
        const char *   key;
        GVariant *     value, *value2;
        guint          n;

        n = a->attributes ? g_hash_table_size(a->attributes) : 0u;
        NM_CMP_DIRECT(n, (b->attributes ? g_hash_table_size(b->attributes) : 0u));

        if (n > 0) {
            g_hash_table_iter_init(&iter, a->attributes);
            while (g_hash_table_iter_next(&iter, (gpointer *) &key, (gpointer *) &value)) {
                value2 = g_hash_table_lookup(b->attributes, key);
                /* We cannot really compare GVariants, because g_variant_compare() does
                 * not work in general. So, don't bother. NM_IP_ADDRESS_CMP_FLAGS_WITH_ATTRS is
                 * documented to not provide a total order for the attribute contents.
                 *
                 * Theoretically, we can implement also a total order. However we should
                 * not do that by default because it would require us to sort the keys
                 * first. Most callers don't care about total order, so they shouldn't
                 * pay the overhead. */
                if (!value2)
                    return -2;
                if (!g_variant_equal(value, value2))
                    return -2;
            }
        }
    }

    return 0;
}

/**
 * nm_ip_address_equal:
 * @address: the #NMIPAddress
 * @other: the #NMIPAddress to compare @address to.
 *
 * Determines if two #NMIPAddress objects contain the same address and prefix
 * (attributes are not compared).
 *
 * Returns: %TRUE if the objects contain the same values, %FALSE if they do not.
 **/
gboolean
nm_ip_address_equal(NMIPAddress *address, NMIPAddress *other)
{
    return nm_ip_address_cmp_full(address, other, NM_IP_ADDRESS_CMP_FLAGS_NONE) == 0;
}

/**
 * nm_ip_address_dup:
 * @address: the #NMIPAddress
 *
 * Creates a copy of @address
 *
 * Returns: (transfer full): a copy of @address
 *
 * This API was part of public headers before 1.32.0 but
 * was erroneously not exported in the ABI. It is thus only
 * usable since 1.32.0.
 *
 * Since: 1.32
 **/
NMIPAddress *
nm_ip_address_dup(NMIPAddress *address)
{
    NMIPAddress *copy;

    g_return_val_if_fail(address != NULL, NULL);
    g_return_val_if_fail(address->refcount > 0, NULL);

    copy = nm_ip_address_new(address->family, address->address, address->prefix, NULL);
    if (address->attributes) {
        GHashTableIter iter;
        const char *   key;
        GVariant *     value;

        g_hash_table_iter_init(&iter, address->attributes);
        while (g_hash_table_iter_next(&iter, (gpointer *) &key, (gpointer *) &value))
            nm_ip_address_set_attribute(copy, key, value);
    }

    return copy;
}

/**
 * nm_ip_address_get_family:
 * @address: the #NMIPAddress
 *
 * Gets the IP address family (eg, AF_INET) property of this address
 * object.
 *
 * Returns: the IP address family
 **/
int
nm_ip_address_get_family(NMIPAddress *address)
{
    g_return_val_if_fail(address != NULL, 0);
    g_return_val_if_fail(address->refcount > 0, 0);

    return address->family;
}

/**
 * nm_ip_address_get_address:
 * @address: the #NMIPAddress
 *
 * Gets the IP address property of this address object.
 *
 * Returns: the IP address
 **/
const char *
nm_ip_address_get_address(NMIPAddress *address)
{
    g_return_val_if_fail(address != NULL, NULL);
    g_return_val_if_fail(address->refcount > 0, NULL);

    return address->address;
}

/**
 * nm_ip_address_set_address:
 * @address: the #NMIPAddress
 * @addr: the IP address, as a string
 *
 * Sets the IP address property of this address object.
 *
 * @addr must be a valid address of @address's family. If you aren't sure you
 * have a valid address, use nm_utils_ipaddr_valid() to check it.
 **/
void
nm_ip_address_set_address(NMIPAddress *address, const char *addr)
{
    g_return_if_fail(address != NULL);
    g_return_if_fail(addr != NULL);
    g_return_if_fail(nm_utils_ipaddr_is_valid(address->family, addr));

    g_free(address->address);
    address->address = canonicalize_ip(address->family, addr, FALSE);
}

/**
 * nm_ip_address_get_address_binary: (skip)
 * @address: the #NMIPAddress
 * @addr: a buffer in which to store the address in binary format.
 *
 * Gets the IP address property of this address object.
 *
 * @addr must point to a buffer that is the correct size for @address's family.
 **/
void
nm_ip_address_get_address_binary(NMIPAddress *address, gpointer addr)
{
    g_return_if_fail(address != NULL);
    g_return_if_fail(addr != NULL);

    inet_pton(address->family, address->address, addr);
}

/**
 * nm_ip_address_set_address_binary: (skip)
 * @address: the #NMIPAddress
 * @addr: the address, in binary format
 *
 * Sets the IP address property of this address object.
 *
 * @addr must point to a buffer that is the correct size for @address's family.
 **/
void
nm_ip_address_set_address_binary(NMIPAddress *address, gconstpointer addr)
{
    char string[NM_UTILS_INET_ADDRSTRLEN];

    g_return_if_fail(address != NULL);
    g_return_if_fail(addr != NULL);

    g_free(address->address);
    address->address = g_strdup(inet_ntop(address->family, addr, string, sizeof(string)));
}

/**
 * nm_ip_address_get_prefix:
 * @address: the #NMIPAddress
 *
 * Gets the IP address prefix (ie "24" or "30" etc) property of this address
 * object.
 *
 * Returns: the IP address prefix
 **/
guint
nm_ip_address_get_prefix(NMIPAddress *address)
{
    g_return_val_if_fail(address != NULL, 0);
    g_return_val_if_fail(address->refcount > 0, 0);

    return address->prefix;
}

/**
 * nm_ip_address_set_prefix:
 * @address: the #NMIPAddress
 * @prefix: the IP address prefix
 *
 * Sets the IP address prefix property of this address object.
 **/
void
nm_ip_address_set_prefix(NMIPAddress *address, guint prefix)
{
    g_return_if_fail(address != NULL);
    g_return_if_fail(valid_prefix(address->family, prefix, NULL));

    address->prefix = prefix;
}

const char **
_nm_ip_address_get_attribute_names(const NMIPAddress *address, gboolean sorted, guint *out_length)
{
    nm_assert(address);

    return nm_utils_strdict_get_keys(address->attributes, sorted, out_length);
}

/**
 * nm_ip_address_get_attribute_names:
 * @address: the #NMIPAddress
 *
 * Gets an array of attribute names defined on @address.
 *
 * Returns: (transfer full): a %NULL-terminated array of attribute names,
 **/
char **
nm_ip_address_get_attribute_names(NMIPAddress *address)
{
    const char **names;

    g_return_val_if_fail(address, NULL);

    names = _nm_ip_address_get_attribute_names(address, TRUE, NULL);
    return nm_utils_strv_make_deep_copied_nonnull(names);
}

/**
 * nm_ip_address_get_attribute:
 * @address: the #NMIPAddress
 * @name: the name of an address attribute
 *
 * Gets the value of the attribute with name @name on @address
 *
 * Returns: (transfer none): the value of the attribute with name @name on
 *   @address, or %NULL if @address has no such attribute.
 **/
GVariant *
nm_ip_address_get_attribute(NMIPAddress *address, const char *name)
{
    g_return_val_if_fail(address != NULL, NULL);
    g_return_val_if_fail(name != NULL && *name != '\0', NULL);

    if (address->attributes)
        return g_hash_table_lookup(address->attributes, name);
    else
        return NULL;
}

/**
 * nm_ip_address_set_attribute:
 * @address: the #NMIPAddress
 * @name: the name of an address attribute
 * @value: (transfer none) (allow-none): the value
 *
 * Sets or clears the named attribute on @address to the given value.
 **/
void
nm_ip_address_set_attribute(NMIPAddress *address, const char *name, GVariant *value)
{
    g_return_if_fail(address != NULL);
    g_return_if_fail(name != NULL && *name != '\0');
    g_return_if_fail(strcmp(name, "address") != 0 && strcmp(name, "prefix") != 0);

    if (!address->attributes) {
        address->attributes = g_hash_table_new_full(nm_str_hash,
                                                    g_str_equal,
                                                    g_free,
                                                    (GDestroyNotify) g_variant_unref);
    }

    if (value)
        g_hash_table_insert(address->attributes, g_strdup(name), g_variant_ref_sink(value));
    else
        g_hash_table_remove(address->attributes, name);
}

/*****************************************************************************
 * NMIPRoute
 *****************************************************************************/

G_DEFINE_BOXED_TYPE(NMIPRoute, nm_ip_route, nm_ip_route_dup, nm_ip_route_unref)

struct NMIPRoute {
    guint refcount;

    int    family;
    char * dest;
    guint  prefix;
    char * next_hop;
    gint64 metric;

    GHashTable *attributes;
};

/**
 * nm_ip_route_new:
 * @family: the IP address family (<literal>AF_INET</literal> or
 *   <literal>AF_INET6</literal>)
 * @dest: the IP address of the route's destination
 * @prefix: the address prefix length
 * @next_hop: (allow-none): the IP address of the next hop (or %NULL)
 * @metric: the route metric (or -1 for "default")
 * @error: location to store error, or %NULL
 *
 * Creates a new #NMIPRoute object.
 *
 * Returns: (transfer full): the new #NMIPRoute object, or %NULL on error
 **/
NMIPRoute *
nm_ip_route_new(int         family,
                const char *dest,
                guint       prefix,
                const char *next_hop,
                gint64      metric,
                GError **   error)
{
    NMIPRoute *route;

    g_return_val_if_fail(family == AF_INET || family == AF_INET6, NULL);
    g_return_val_if_fail(dest, NULL);

    if (!valid_ip(family, dest, error))
        return NULL;
    if (!valid_prefix(family, prefix, error))
        return NULL;
    if (next_hop && !valid_ip(family, next_hop, error))
        return NULL;
    if (!valid_metric(metric, error))
        return NULL;

    route           = g_slice_new0(NMIPRoute);
    route->refcount = 1;

    route->family   = family;
    route->dest     = canonicalize_ip(family, dest, FALSE);
    route->prefix   = prefix;
    route->next_hop = canonicalize_ip(family, next_hop, TRUE);
    route->metric   = metric;

    return route;
}

/**
 * nm_ip_route_new_binary:
 * @family: the IP address family (<literal>AF_INET</literal> or
 *   <literal>AF_INET6</literal>)
 * @dest: the IP address of the route's destination
 * @prefix: the address prefix length
 * @next_hop: (allow-none): the IP address of the next hop (or %NULL)
 * @metric: the route metric (or -1 for "default")
 * @error: location to store error, or %NULL
 *
 * Creates a new #NMIPRoute object. @dest and @next_hop (if non-%NULL) must
 * point to buffers of the correct size for @family.
 *
 * Returns: (transfer full): the new #NMIPRoute object, or %NULL on error
 **/
NMIPRoute *
nm_ip_route_new_binary(int           family,
                       gconstpointer dest,
                       guint         prefix,
                       gconstpointer next_hop,
                       gint64        metric,
                       GError **     error)
{
    NMIPRoute *route;

    g_return_val_if_fail(family == AF_INET || family == AF_INET6, NULL);
    g_return_val_if_fail(dest, NULL);

    if (!valid_prefix(family, prefix, error))
        return NULL;
    if (!valid_metric(metric, error))
        return NULL;

    route           = g_slice_new0(NMIPRoute);
    route->refcount = 1;

    route->family   = family;
    route->dest     = canonicalize_ip_binary(family, dest, FALSE);
    route->prefix   = prefix;
    route->next_hop = canonicalize_ip_binary(family, next_hop, TRUE);
    route->metric   = metric;

    return route;
}

/**
 * nm_ip_route_ref:
 * @route: the #NMIPRoute
 *
 * Increases the reference count of the object.
 **/
void
nm_ip_route_ref(NMIPRoute *route)
{
    g_return_if_fail(route != NULL);
    g_return_if_fail(route->refcount > 0);

    route->refcount++;
}

/**
 * nm_ip_route_unref:
 * @route: the #NMIPRoute
 *
 * Decreases the reference count of the object.  If the reference count
 * reaches zero, the object will be destroyed.
 **/
void
nm_ip_route_unref(NMIPRoute *route)
{
    g_return_if_fail(route != NULL);
    g_return_if_fail(route->refcount > 0);

    route->refcount--;
    if (route->refcount == 0) {
        g_free(route->dest);
        g_free(route->next_hop);
        if (route->attributes)
            g_hash_table_unref(route->attributes);
        g_slice_free(NMIPRoute, route);
    }
}

/**
 * nm_ip_route_equal_full:
 * @route: the #NMIPRoute
 * @other: the #NMIPRoute to compare @route to.
 * @cmp_flags: tune how to compare attributes. Currently, only
 *   NM_IP_ROUTE_EQUAL_CMP_FLAGS_NONE (0) and NM_IP_ROUTE_EQUAL_CMP_FLAGS_WITH_ATTRS (1)
 *   is supported.
 *
 * Determines if two #NMIPRoute objects contain the same destination, prefix,
 * next hop, and metric.
 *
 * Returns: %TRUE if the objects contain the same values, %FALSE if they do not.
 *
 * Since: 1.10
 **/
gboolean
nm_ip_route_equal_full(NMIPRoute *route, NMIPRoute *other, guint cmp_flags)
{
    g_return_val_if_fail(route != NULL, FALSE);
    g_return_val_if_fail(route->refcount > 0, FALSE);

    g_return_val_if_fail(other != NULL, FALSE);
    g_return_val_if_fail(other->refcount > 0, FALSE);

    g_return_val_if_fail(NM_IN_SET(cmp_flags,
                                   NM_IP_ROUTE_EQUAL_CMP_FLAGS_NONE,
                                   NM_IP_ROUTE_EQUAL_CMP_FLAGS_WITH_ATTRS),
                         FALSE);

    if (route->prefix != other->prefix || route->metric != other->metric
        || strcmp(route->dest, other->dest) != 0
        || g_strcmp0(route->next_hop, other->next_hop) != 0)
        return FALSE;
    if (cmp_flags == NM_IP_ROUTE_EQUAL_CMP_FLAGS_WITH_ATTRS) {
        GHashTableIter iter;
        const char *   key;
        GVariant *     value, *value2;
        guint          n;

        n = route->attributes ? g_hash_table_size(route->attributes) : 0u;
        if (n != (other->attributes ? g_hash_table_size(other->attributes) : 0u))
            return FALSE;
        if (n) {
            g_hash_table_iter_init(&iter, route->attributes);
            while (g_hash_table_iter_next(&iter, (gpointer *) &key, (gpointer *) &value)) {
                value2 = g_hash_table_lookup(other->attributes, key);
                if (!value2)
                    return FALSE;
                if (!g_variant_equal(value, value2))
                    return FALSE;
            }
        }
    }
    return TRUE;
}

/**
 * nm_ip_route_equal:
 * @route: the #NMIPRoute
 * @other: the #NMIPRoute to compare @route to.
 *
 * Determines if two #NMIPRoute objects contain the same destination, prefix,
 * next hop, and metric. (Attributes are not compared.)
 *
 * Returns: %TRUE if the objects contain the same values, %FALSE if they do not.
 **/
gboolean
nm_ip_route_equal(NMIPRoute *route, NMIPRoute *other)
{
    return nm_ip_route_equal_full(route, other, NM_IP_ROUTE_EQUAL_CMP_FLAGS_NONE);
}

/**
 * nm_ip_route_dup:
 * @route: the #NMIPRoute
 *
 * Creates a copy of @route
 *
 * Returns: (transfer full): a copy of @route
 *
 * This API was part of public headers before 1.32.0 but
 * was erroneously not exported in the ABI. It is thus only
 * usable since 1.32.0.
 *
 * Since: 1.32
 **/
NMIPRoute *
nm_ip_route_dup(NMIPRoute *route)
{
    NMIPRoute *copy;

    g_return_val_if_fail(route != NULL, NULL);
    g_return_val_if_fail(route->refcount > 0, NULL);

    copy = nm_ip_route_new(route->family,
                           route->dest,
                           route->prefix,
                           route->next_hop,
                           route->metric,
                           NULL);
    if (route->attributes) {
        GHashTableIter iter;
        const char *   key;
        GVariant *     value;

        g_hash_table_iter_init(&iter, route->attributes);
        while (g_hash_table_iter_next(&iter, (gpointer *) &key, (gpointer *) &value))
            nm_ip_route_set_attribute(copy, key, value);
    }

    return copy;
}

/**
 * nm_ip_route_get_family:
 * @route: the #NMIPRoute
 *
 * Gets the IP address family (eg, AF_INET) property of this route
 * object.
 *
 * Returns: the IP address family
 **/
int
nm_ip_route_get_family(NMIPRoute *route)
{
    g_return_val_if_fail(route != NULL, 0);
    g_return_val_if_fail(route->refcount > 0, 0);

    return route->family;
}

/**
 * nm_ip_route_get_dest:
 * @route: the #NMIPRoute
 *
 * Gets the IP destination address property of this route object.
 *
 * Returns: the IP address of the route's destination
 **/
const char *
nm_ip_route_get_dest(NMIPRoute *route)
{
    g_return_val_if_fail(route != NULL, NULL);
    g_return_val_if_fail(route->refcount > 0, NULL);

    return route->dest;
}

/**
 * nm_ip_route_set_dest:
 * @route: the #NMIPRoute
 * @dest: the route's destination, as a string
 *
 * Sets the destination property of this route object.
 *
 * @dest must be a valid address of @route's family. If you aren't sure you
 * have a valid address, use nm_utils_ipaddr_is_valid() to check it.
 **/
void
nm_ip_route_set_dest(NMIPRoute *route, const char *dest)
{
    g_return_if_fail(route != NULL);
    g_return_if_fail(nm_utils_ipaddr_is_valid(route->family, dest));

    g_free(route->dest);
    route->dest = canonicalize_ip(route->family, dest, FALSE);
}

/**
 * nm_ip_route_get_dest_binary: (skip)
 * @route: the #NMIPRoute
 * @dest: a buffer in which to store the destination in binary format.
 *
 * Gets the destination property of this route object.
 *
 * @dest must point to a buffer that is the correct size for @route's family.
 **/
void
nm_ip_route_get_dest_binary(NMIPRoute *route, gpointer dest)
{
    g_return_if_fail(route != NULL);
    g_return_if_fail(dest != NULL);

    inet_pton(route->family, route->dest, dest);
}

/**
 * nm_ip_route_set_dest_binary: (skip)
 * @route: the #NMIPRoute
 * @dest: the route's destination, in binary format
 *
 * Sets the destination property of this route object.
 *
 * @dest must point to a buffer that is the correct size for @route's family.
 **/
void
nm_ip_route_set_dest_binary(NMIPRoute *route, gconstpointer dest)
{
    char string[NM_UTILS_INET_ADDRSTRLEN];

    g_return_if_fail(route != NULL);
    g_return_if_fail(dest != NULL);

    g_free(route->dest);
    route->dest = g_strdup(inet_ntop(route->family, dest, string, sizeof(string)));
}

/**
 * nm_ip_route_get_prefix:
 * @route: the #NMIPRoute
 *
 * Gets the IP prefix (ie "24" or "30" etc) of this route.
 *
 * Returns: the IP prefix
 **/
guint
nm_ip_route_get_prefix(NMIPRoute *route)
{
    g_return_val_if_fail(route != NULL, 0);
    g_return_val_if_fail(route->refcount > 0, 0);

    return route->prefix;
}

/**
 * nm_ip_route_set_prefix:
 * @route: the #NMIPRoute
 * @prefix: the route prefix
 *
 * Sets the prefix property of this route object.
 **/
void
nm_ip_route_set_prefix(NMIPRoute *route, guint prefix)
{
    g_return_if_fail(route != NULL);
    g_return_if_fail(valid_prefix(route->family, prefix, NULL));

    route->prefix = prefix;
}

/**
 * nm_ip_route_get_next_hop:
 * @route: the #NMIPRoute
 *
 * Gets the IP address of the next hop of this route; this will be %NULL if the
 * route has no next hop.
 *
 * Returns: the IP address of the next hop, or %NULL if this is a device route.
 **/
const char *
nm_ip_route_get_next_hop(NMIPRoute *route)
{
    g_return_val_if_fail(route != NULL, NULL);
    g_return_val_if_fail(route->refcount > 0, NULL);

    return route->next_hop;
}

/**
 * nm_ip_route_set_next_hop:
 * @route: the #NMIPRoute
 * @next_hop: (allow-none): the route's next hop, as a string
 *
 * Sets the next-hop property of this route object.
 *
 * @next_hop (if non-%NULL) must be a valid address of @route's family. If you
 * aren't sure you have a valid address, use nm_utils_ipaddr_valid() to check
 * it.
 **/
void
nm_ip_route_set_next_hop(NMIPRoute *route, const char *next_hop)
{
    g_return_if_fail(route != NULL);
    g_return_if_fail(!next_hop || nm_utils_ipaddr_is_valid(route->family, next_hop));

    g_free(route->next_hop);
    route->next_hop = canonicalize_ip(route->family, next_hop, TRUE);
}

/**
 * nm_ip_route_get_next_hop_binary: (skip)
 * @route: the #NMIPRoute
 * @next_hop: a buffer in which to store the next hop in binary format.
 *
 * Gets the next hop property of this route object.
 *
 * @next_hop must point to a buffer that is the correct size for @route's family.
 *
 * Returns: %TRUE if @route has a next hop, %FALSE if not (in which case
 * @next_hop will be zeroed out)
 **/
gboolean
nm_ip_route_get_next_hop_binary(NMIPRoute *route, gpointer next_hop)
{
    g_return_val_if_fail(route != NULL, FALSE);
    g_return_val_if_fail(next_hop != NULL, FALSE);

    if (route->next_hop) {
        inet_pton(route->family, route->next_hop, next_hop);
        return TRUE;
    } else {
        memset(next_hop, 0, nm_utils_addr_family_to_size(route->family));
        return FALSE;
    }
}

/**
 * nm_ip_route_set_next_hop_binary: (skip)
 * @route: the #NMIPRoute
 * @next_hop: the route's next hop, in binary format
 *
 * Sets the destination property of this route object.
 *
 * @next_hop (if non-%NULL) must point to a buffer that is the correct size for
 * @route's family.
 **/
void
nm_ip_route_set_next_hop_binary(NMIPRoute *route, gconstpointer next_hop)
{
    g_return_if_fail(route != NULL);

    g_free(route->next_hop);
    route->next_hop = canonicalize_ip_binary(route->family, next_hop, TRUE);
}

/**
 * nm_ip_route_get_metric:
 * @route: the #NMIPRoute
 *
 * Gets the route metric property of this route object; lower values
 * indicate "better" or more preferred routes; -1 indicates "default"
 * (meaning NetworkManager will set it appropriately).
 *
 * Returns: the route metric
 **/
gint64
nm_ip_route_get_metric(NMIPRoute *route)
{
    g_return_val_if_fail(route != NULL, 0);
    g_return_val_if_fail(route->refcount > 0, 0);

    return route->metric;
}

/**
 * nm_ip_route_set_metric:
 * @route: the #NMIPRoute
 * @metric: the route metric (or -1 for "default")
 *
 * Sets the metric property of this route object.
 **/
void
nm_ip_route_set_metric(NMIPRoute *route, gint64 metric)
{
    g_return_if_fail(route != NULL);
    g_return_if_fail(valid_metric(metric, NULL));

    route->metric = metric;
}

GHashTable *
_nm_ip_route_get_attributes(NMIPRoute *route)
{
    nm_assert(route);

    return route->attributes;
}

/**
 * _nm_ip_route_get_attribute_names:
 * @route: the #NMIPRoute
 * @sorted: whether to sort the names. Otherwise, their order is
 *   undefined and unstable.
 * @out_length: (allow-none) (out): the number of elements
 *
 * Gets an array of attribute names defined on @route.
 *
 * Returns: (array length=out_length) (transfer container): a %NULL-terminated array
 *   of attribute names or %NULL if there are no attributes. The order of the returned
 *   names depends on @sorted.
 **/
const char **
_nm_ip_route_get_attribute_names(const NMIPRoute *route, gboolean sorted, guint *out_length)
{
    nm_assert(route);

    return nm_utils_strdict_get_keys(route->attributes, sorted, out_length);
}

/**
 * nm_ip_route_get_attribute_names:
 * @route: the #NMIPRoute
 *
 * Gets an array of attribute names defined on @route.
 *
 * Returns: (transfer full): a %NULL-terminated array of attribute names
 **/
char **
nm_ip_route_get_attribute_names(NMIPRoute *route)
{
    const char **names;

    g_return_val_if_fail(route != NULL, NULL);

    names = _nm_ip_route_get_attribute_names(route, TRUE, NULL);
    return nm_utils_strv_make_deep_copied_nonnull(names);
}

/**
 * nm_ip_route_get_attribute:
 * @route: the #NMIPRoute
 * @name: the name of an route attribute
 *
 * Gets the value of the attribute with name @name on @route
 *
 * Returns: (transfer none): the value of the attribute with name @name on
 *   @route, or %NULL if @route has no such attribute.
 **/
GVariant *
nm_ip_route_get_attribute(NMIPRoute *route, const char *name)
{
    g_return_val_if_fail(route != NULL, NULL);
    g_return_val_if_fail(name != NULL && *name != '\0', NULL);

    if (route->attributes)
        return g_hash_table_lookup(route->attributes, name);
    else
        return NULL;
}

/**
 * nm_ip_route_set_attribute:
 * @route: the #NMIPRoute
 * @name: the name of a route attribute
 * @value: (transfer none) (allow-none): the value
 *
 * Sets the named attribute on @route to the given value.
 **/
void
nm_ip_route_set_attribute(NMIPRoute *route, const char *name, GVariant *value)
{
    g_return_if_fail(route != NULL);
    g_return_if_fail(name != NULL && *name != '\0');
    g_return_if_fail(strcmp(name, "dest") != 0 && strcmp(name, "prefix") != 0
                     && strcmp(name, "next-hop") != 0 && strcmp(name, "metric") != 0);

    if (!route->attributes) {
        route->attributes = g_hash_table_new_full(nm_str_hash,
                                                  g_str_equal,
                                                  g_free,
                                                  (GDestroyNotify) g_variant_unref);
    }

    if (value)
        g_hash_table_insert(route->attributes, g_strdup(name), g_variant_ref_sink(value));
    else
        g_hash_table_remove(route->attributes, name);
}

static const NMVariantAttributeSpec *const ip_route_attribute_spec[] = {
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_CWND,
                                     G_VARIANT_TYPE_UINT32,
                                     .v4 = TRUE,
                                     .v6 = TRUE, ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_FROM,
                                     G_VARIANT_TYPE_STRING,
                                     .v6       = TRUE,
                                     .str_type = 'p', ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_INITCWND,
                                     G_VARIANT_TYPE_UINT32,
                                     .v4 = TRUE,
                                     .v6 = TRUE, ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_INITRWND,
                                     G_VARIANT_TYPE_UINT32,
                                     .v4 = TRUE,
                                     .v6 = TRUE, ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_LOCK_CWND,
                                     G_VARIANT_TYPE_BOOLEAN,
                                     .v4 = TRUE,
                                     .v6 = TRUE, ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_LOCK_INITCWND,
                                     G_VARIANT_TYPE_BOOLEAN,
                                     .v4 = TRUE,
                                     .v6 = TRUE, ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_LOCK_INITRWND,
                                     G_VARIANT_TYPE_BOOLEAN,
                                     .v4 = TRUE,
                                     .v6 = TRUE, ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_LOCK_MTU,
                                     G_VARIANT_TYPE_BOOLEAN,
                                     .v4 = TRUE,
                                     .v6 = TRUE, ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_LOCK_WINDOW,
                                     G_VARIANT_TYPE_BOOLEAN,
                                     .v4 = TRUE,
                                     .v6 = TRUE, ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_MTU,
                                     G_VARIANT_TYPE_UINT32,
                                     .v4 = TRUE,
                                     .v6 = TRUE, ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_ONLINK,
                                     G_VARIANT_TYPE_BOOLEAN,
                                     .v4 = TRUE,
                                     .v6 = TRUE, ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_SCOPE,
                                     G_VARIANT_TYPE_BYTE,
                                     .v4 = TRUE, ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_SRC,
                                     G_VARIANT_TYPE_STRING,
                                     .v4       = TRUE,
                                     .v6       = TRUE,
                                     .str_type = 'a', ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_TABLE,
                                     G_VARIANT_TYPE_UINT32,
                                     .v4 = TRUE,
                                     .v6 = TRUE, ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_TOS, G_VARIANT_TYPE_BYTE, .v4 = TRUE, ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_TYPE,
                                     G_VARIANT_TYPE_STRING,
                                     .v4       = TRUE,
                                     .v6       = TRUE,
                                     .str_type = 'T', ),
    NM_VARIANT_ATTRIBUTE_SPEC_DEFINE(NM_IP_ROUTE_ATTRIBUTE_WINDOW,
                                     G_VARIANT_TYPE_UINT32,
                                     .v4 = TRUE,
                                     .v6 = TRUE, ),
    NULL,
};

/**
 * nm_ip_route_get_variant_attribute_spec:
 *
 * Returns: the specifiers for route attributes
 *
 * Since: 1.8
 */
const NMVariantAttributeSpec *const *
nm_ip_route_get_variant_attribute_spec(void)
{
    return ip_route_attribute_spec;
}

/**
 * nm_ip_route_attribute_validate:
 * @name: the attribute name
 * @value: the attribute value
 * @family: IP address family of the route
 * @known: (out): on return, whether the attribute name is a known one
 * @error: (allow-none): return location for a #GError, or %NULL
 *
 * Validates a route attribute, i.e. checks that the attribute is a known one
 * and the value is of the correct type and well-formed.
 *
 * Returns: %TRUE if the attribute is valid, %FALSE otherwise
 *
 * Since: 1.8
 */
gboolean
nm_ip_route_attribute_validate(const char *name,
                               GVariant *  value,
                               int         family,
                               gboolean *  known,
                               GError **   error)
{
    const NMVariantAttributeSpec *spec;

    g_return_val_if_fail(name, FALSE);
    g_return_val_if_fail(value, FALSE);
    g_return_val_if_fail(family == AF_INET || family == AF_INET6, FALSE);
    g_return_val_if_fail(!error || !*error, FALSE);

    spec = _nm_variant_attribute_spec_find_binary_search(ip_route_attribute_spec,
                                                         G_N_ELEMENTS(ip_route_attribute_spec) - 1,
                                                         name);
    if (!spec) {
        NM_SET_OUT(known, FALSE);
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_FAILED,
                            _("unknown attribute"));
        return FALSE;
    }

    NM_SET_OUT(known, TRUE);

    if (!g_variant_is_of_type(value, spec->type)) {
        g_set_error(error,
                    NM_CONNECTION_ERROR,
                    NM_CONNECTION_ERROR_FAILED,
                    _("invalid attribute type '%s'"),
                    g_variant_get_type_string(value));
        return FALSE;
    }

    if ((family == AF_INET && !spec->v4) || (family == AF_INET6 && !spec->v6)) {
        g_set_error(error,
                    NM_CONNECTION_ERROR,
                    NM_CONNECTION_ERROR_FAILED,
                    family == AF_INET ? _("attribute is not valid for a IPv4 route")
                                      : _("attribute is not valid for a IPv6 route"));
        return FALSE;
    }

    if (g_variant_type_equal(spec->type, G_VARIANT_TYPE_STRING)) {
        const char *string = g_variant_get_string(value, NULL);

        switch (spec->str_type) {
        case 'a': /* IP address */
            if (!nm_utils_ipaddr_is_valid(family, string)) {
                g_set_error(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_FAILED,
                            family == AF_INET ? _("'%s' is not a valid IPv4 address")
                                              : _("'%s' is not a valid IPv6 address"),
                            string);
                return FALSE;
            }
            break;
        case 'p': /* IP address + optional prefix */
        {
            gs_free char *addr_free = NULL;
            const char *  addr      = string;
            const char *  str;

            str = strchr(addr, '/');
            if (str) {
                addr = nm_strndup_a(200, addr, str - addr, &addr_free);
                str++;
                if (_nm_utils_ascii_str_to_int64(str, 10, 0, family == AF_INET ? 32 : 128, -1)
                    < 0) {
                    g_set_error(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_FAILED,
                                _("invalid prefix %s"),
                                str);
                    return FALSE;
                }
            }
            if (!nm_utils_ipaddr_is_valid(family, addr)) {
                g_set_error(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_FAILED,
                            family == AF_INET ? _("'%s' is not a valid IPv4 address")
                                              : _("'%s' is not a valid IPv6 address"),
                            string);
                return FALSE;
            }
            break;
        }
        case 'T': /* route type. */
            if (!NM_IN_SET(nm_net_aux_rtnl_rtntype_a2n(string), RTN_UNICAST, RTN_LOCAL)) {
                g_set_error(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("%s is not a valid route type"),
                            string);
                return FALSE;
            }
            break;
        default:
            break;
        }
    }

    return TRUE;
}

gboolean
_nm_ip_route_attribute_validate_all(const NMIPRoute *route, GError **error)
{
    NMUtilsNamedValue attrs_static[G_N_ELEMENTS(ip_route_attribute_spec)];
    gs_free NMUtilsNamedValue *attrs_free = NULL;
    const NMUtilsNamedValue *  attrs;
    guint                      attrs_len;
    GVariant *                 val;
    guint                      i;
    guint8                     u8;

    g_return_val_if_fail(route, FALSE);
    g_return_val_if_fail(!error || !*error, FALSE);

    if (!route->attributes)
        return TRUE;

    attrs = nm_utils_named_values_from_strdict(route->attributes,
                                               &attrs_len,
                                               attrs_static,
                                               &attrs_free);
    for (i = 0; i < attrs_len; i++) {
        const char *key  = attrs[i].name;
        GVariant *  val2 = attrs[i].value_ptr;

        if (!nm_ip_route_attribute_validate(key, val2, route->family, NULL, NULL))
            return FALSE;
    }

    if ((val = g_hash_table_lookup(route->attributes, NM_IP_ROUTE_ATTRIBUTE_TYPE))) {
        int v_i;

        nm_assert(g_variant_is_of_type(val, G_VARIANT_TYPE_STRING));

        v_i = nm_net_aux_rtnl_rtntype_a2n(g_variant_get_string(val, NULL));
        nm_assert(v_i >= 0);

        if (v_i == RTN_LOCAL && route->family == AF_INET
            && (val = g_hash_table_lookup(route->attributes, NM_IP_ROUTE_ATTRIBUTE_SCOPE))) {
            nm_assert(g_variant_is_of_type(val, G_VARIANT_TYPE_BYTE));
            u8 = g_variant_get_byte(val);

            if (!NM_IN_SET(u8, RT_SCOPE_HOST, RT_SCOPE_NOWHERE)) {
                g_set_error(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("route scope is invalid"));
                return FALSE;
            }
        }
    }

    return TRUE;
}

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

struct NMIPRoutingRule {
    NMIPAddr from_bin;
    NMIPAddr to_bin;
    char *   from_str;
    char *   to_str;
    char *   iifname;
    char *   oifname;
    guint    ref_count;
    guint32  priority;
    guint32  table;
    gint32   suppress_prefixlength;
    guint32  fwmark;
    guint32  fwmask;
    guint32  uid_range_start;
    guint32  uid_range_end;
    guint16  sport_start;
    guint16  sport_end;
    guint16  dport_start;
    guint16  dport_end;
    guint8   action;
    guint8   from_len;
    guint8   to_len;
    guint8   tos;
    guint8   ipproto;
    bool     is_v4 : 1;
    bool     sealed : 1;
    bool     priority_has : 1;
    bool     uid_range_has : 1;
    bool     from_has : 1;
    bool     from_valid : 1;
    bool     to_has : 1;
    bool     to_valid : 1;
    bool     invert : 1;
};

static NMIPRoutingRule *_ip_routing_rule_dup(const NMIPRoutingRule *rule);

G_DEFINE_BOXED_TYPE(NMIPRoutingRule,
                    nm_ip_routing_rule,
                    _ip_routing_rule_dup,
                    nm_ip_routing_rule_unref)

static gboolean
NM_IS_IP_ROUTING_RULE(const NMIPRoutingRule *self, gboolean also_sealed)
{
    return self && self->ref_count > 0 && (also_sealed || !self->sealed);
}

static int
_ip_routing_rule_get_addr_family(const NMIPRoutingRule *self)
{
    nm_assert(NM_IS_IP_ROUTING_RULE(self, TRUE));

    return self->is_v4 ? AF_INET : AF_INET6;
}

static int
_ip_routing_rule_get_addr_size(const NMIPRoutingRule *self)
{
    nm_assert(NM_IS_IP_ROUTING_RULE(self, TRUE));

    return self->is_v4 ? sizeof(struct in_addr) : sizeof(struct in6_addr);
}

static NMIPRoutingRule *
_ip_routing_rule_dup(const NMIPRoutingRule *rule)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(rule, TRUE), NULL);

    if (rule->sealed)
        return nm_ip_routing_rule_ref((NMIPRoutingRule *) rule);
    return nm_ip_routing_rule_new_clone(rule);
}

/**
 * nm_ip_routing_rule_new:
 * @addr_family: the address family of the routing rule. Must be either
 *   %AF_INET (2) or %AF_INET6 (10).
 *
 * Returns: (transfer full): a newly created rule instance with the
 *   provided address family. The instance is unsealed.
 *
 * Since: 1.18
 */
NMIPRoutingRule *
nm_ip_routing_rule_new(int addr_family)
{
    NMIPRoutingRule *self;

    g_return_val_if_fail(NM_IN_SET(addr_family, AF_INET, AF_INET6), NULL);

    self  = g_slice_new(NMIPRoutingRule);
    *self = (NMIPRoutingRule){
        .ref_count             = 1,
        .is_v4                 = (addr_family == AF_INET),
        .action                = FR_ACT_TO_TBL,
        .table                 = RT_TABLE_MAIN,
        .suppress_prefixlength = -1,
    };
    return self;
}

/**
 * nm_ip_routing_rule_new_clone:
 * @rule: the #NMIPRoutingRule to clone.
 *
 * Returns: (transfer full): a newly created rule instance with
 *   the same settings as @rule. Note that the instance will
 *   always be unsealred.
 *
 * Since: 1.18
 */
NMIPRoutingRule *
nm_ip_routing_rule_new_clone(const NMIPRoutingRule *rule)
{
    NMIPRoutingRule *self;

    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(rule, TRUE), NULL);

    self  = g_slice_new(NMIPRoutingRule);
    *self = (NMIPRoutingRule){
        .ref_count = 1,
        .sealed    = FALSE,
        .is_v4     = rule->is_v4,

        .priority     = rule->priority,
        .priority_has = rule->priority_has,

        .invert = rule->invert,

        .tos = rule->tos,

        .fwmark = rule->fwmark,
        .fwmask = rule->fwmask,

        .sport_start = rule->sport_start,
        .sport_end   = rule->sport_end,
        .dport_start = rule->dport_start,
        .dport_end   = rule->dport_end,

        .uid_range_start = rule->uid_range_start,
        .uid_range_end   = rule->uid_range_end,
        .uid_range_has   = rule->uid_range_has,

        .ipproto = rule->ipproto,

        .from_len   = rule->from_len,
        .from_bin   = rule->from_bin,
        .from_str   = (rule->from_has && !rule->from_valid) ? g_strdup(rule->from_str) : NULL,
        .from_has   = rule->from_has,
        .from_valid = rule->from_valid,

        .to_len   = rule->to_len,
        .to_bin   = rule->to_bin,
        .to_str   = (rule->to_has && !rule->to_valid) ? g_strdup(rule->to_str) : NULL,
        .to_has   = rule->to_has,
        .to_valid = rule->to_valid,

        .iifname = g_strdup(rule->iifname),
        .oifname = g_strdup(rule->oifname),

        .action = rule->action,
        .table  = rule->table,

        .suppress_prefixlength = rule->suppress_prefixlength,
    };
    return self;
}

/**
 * nm_ip_routing_rule_ref:
 * @self: (allow-none): the #NMIPRoutingRule instance
 *
 * Increases the reference count of the instance.
 * This is not thread-safe.
 *
 * Returns: (transfer full): the @self argument with incremented
 *  reference count.
 *
 * Since: 1.18
 */
NMIPRoutingRule *
nm_ip_routing_rule_ref(NMIPRoutingRule *self)
{
    if (!self)
        return NULL;

    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), NULL);

    nm_assert(self->ref_count < G_MAXUINT);
    self->ref_count++;
    return self;
}

/**
 * nm_ip_routing_rule_unref:
 * @self: (allow-none): the #NMIPRoutingRule instance
 *
 * Decreases the reference count of the instance and destroys
 * the instance if the reference count reaches zero.
 * This is not thread-safe.
 *
 * Since: 1.18
 */
void
nm_ip_routing_rule_unref(NMIPRoutingRule *self)
{
    if (!self)
        return;

    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE));

    if (--self->ref_count > 0)
        return;

    g_free(self->from_str);
    g_free(self->to_str);
    g_free(self->iifname);
    g_free(self->oifname);

    g_slice_free(NMIPRoutingRule, self);
}

/**
 * nm_ip_routing_rule_is_sealed:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: whether @self is sealed. Once sealed, an instance
 *   cannot be modified nor unsealed.
 *
 * Since: 1.18
 */
gboolean
nm_ip_routing_rule_is_sealed(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), FALSE);

    return self->sealed;
}

/**
 * nm_ip_routing_rule_seal:
 * @self: the #NMIPRoutingRule instance
 *
 * Seals the routing rule. Afterwards, the instance can no longer be
 * modified, and it is a bug to call any of the accessors that would
 * modify the rule. If @self was already sealed, this has no effect.
 *
 * Since: 1.18
 */
void
nm_ip_routing_rule_seal(NMIPRoutingRule *self)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE));

    self->sealed = TRUE;
}

/**
 * nm_ip_routing_rule_get_addr_family:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the address family of the rule. Either %AF_INET or %AF_INET6.
 *
 * Since: 1.18
 */
int
nm_ip_routing_rule_get_addr_family(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), AF_UNSPEC);

    return _ip_routing_rule_get_addr_family(self);
}

/**
 * nm_ip_routing_rule_get_priority:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the priority. A valid priority is in the range from
 *   0 to %G_MAXUINT32. If unset, -1 is returned.
 *
 * Since: 1.18
 */
gint64
nm_ip_routing_rule_get_priority(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), -1);

    return self->priority_has ? (gint64) self->priority : (gint64) -1;
}

/**
 * nm_ip_routing_rule_set_priority:
 * @self: the #NMIPRoutingRule instance
 * @priority: the priority to set
 *
 * A valid priority ranges from 0 to %G_MAXUINT32. "-1" is also allowed
 * to reset the priority. It is a bug calling this function with any
 * other value.
 *
 * Since: 1.18
 */
void
nm_ip_routing_rule_set_priority(NMIPRoutingRule *self, gint64 priority)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    if (priority >= 0 && priority <= (gint64) G_MAXUINT32) {
        self->priority     = (guint32) priority;
        self->priority_has = TRUE;
    } else {
        g_return_if_fail(priority == -1);
        self->priority     = 0;
        self->priority_has = FALSE;
    }
}

/**
 * nm_ip_routing_rule_get_invert:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the "invert" setting of the rule.
 *
 * Since: 1.18
 */
gboolean
nm_ip_routing_rule_get_invert(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), FALSE);

    return self->invert;
}

/**
 * nm_ip_routing_rule_set_invert:
 * @self: the #NMIPRoutingRule instance
 * @invert: the new value to set
 *
 * Since: 1.18
 */
void
nm_ip_routing_rule_set_invert(NMIPRoutingRule *self, gboolean invert)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    self->invert = invert;
}

/**
 * nm_ip_routing_rule_get_from_len:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the set prefix length for the from/src parameter.
 *
 * Since: 1.18
 */
guint8
nm_ip_routing_rule_get_from_len(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), 0);

    return self->from_len;
}

/**
 * nm_ip_routing_rule_get_from:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: (transfer none): the set from/src parameter or
 *   %NULL, if no value is set.
 *
 * Since: 1.18
 */
const char *
nm_ip_routing_rule_get_from(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), NULL);

    if (!self->from_has)
        return NULL;
    if (!self->from_str) {
        nm_assert(self->from_valid);
        ((NMIPRoutingRule *) self)->from_str =
            nm_utils_inet_ntop_dup(_ip_routing_rule_get_addr_family(self), &self->from_bin);
    }
    return self->from_str;
}

const NMIPAddr *
nm_ip_routing_rule_get_from_bin(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), NULL);

    return (self->from_has && self->from_valid) ? &self->from_bin : NULL;
}

void
nm_ip_routing_rule_set_from_bin(NMIPRoutingRule *self, gconstpointer from, guint8 len)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    nm_clear_g_free(&self->from_str);

    if (!from) {
        self->from_has = FALSE;
        self->from_len = len;
        return;
    }

    self->from_has   = TRUE;
    self->from_len   = len;
    self->from_valid = TRUE;
    nm_ip_addr_set(_ip_routing_rule_get_addr_family(self), &self->from_bin, from);
}

/**
 * nm_ip_routing_rule_set_from:
 * @self: the #NMIPRoutingRule instance
 * @from: (allow-none): the from/src address to set.
 *   The address family must match.
 * @len: the corresponding prefix length of the address.
 *
 * Setting invalid values is accepted, but will later fail
 * during nm_ip_routing_rule_validate().
 *
 * Since: 1.18
 */
void
nm_ip_routing_rule_set_from(NMIPRoutingRule *self, const char *from, guint8 len)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    if (!from) {
        nm_clear_g_free(&self->from_str);
        self->from_has = FALSE;
        self->from_len = len;
        return;
    }

    nm_clear_g_free(&self->from_str);
    self->from_has   = TRUE;
    self->from_len   = len;
    self->from_valid = nm_utils_parse_inaddr_bin(_ip_routing_rule_get_addr_family(self),
                                                 from,
                                                 NULL,
                                                 &self->from_bin);
    if (!self->from_valid)
        self->from_str = g_strdup(from);
}

/**
 * nm_ip_routing_rule_get_to_len:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the set prefix length for the to/dst parameter.
 *
 * Since: 1.18
 */
guint8
nm_ip_routing_rule_get_to_len(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), 0);

    return self->to_len;
}

/**
 * nm_ip_routing_rule_get_to:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: (transfer none): the set to/dst parameter or
 *   %NULL, if no value is set.
 *
 * Since: 1.18
 */
const char *
nm_ip_routing_rule_get_to(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), NULL);

    if (!self->to_has)
        return NULL;
    if (!self->to_str) {
        nm_assert(self->to_valid);
        ((NMIPRoutingRule *) self)->to_str =
            nm_utils_inet_ntop_dup(_ip_routing_rule_get_addr_family(self), &self->to_bin);
    }
    return self->to_str;
}

const NMIPAddr *
nm_ip_routing_rule_get_to_bin(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), NULL);

    return (self->to_has && self->to_valid) ? &self->to_bin : NULL;
}

void
nm_ip_routing_rule_set_to_bin(NMIPRoutingRule *self, gconstpointer to, guint8 len)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    nm_clear_g_free(&self->to_str);

    if (!to) {
        self->to_has = FALSE;
        self->to_len = len;
        return;
    }

    self->to_has   = TRUE;
    self->to_len   = len;
    self->to_valid = TRUE;
    nm_ip_addr_set(_ip_routing_rule_get_addr_family(self), &self->to_bin, to);
}

/**
 * nm_ip_routing_rule_set_to:
 * @self: the #NMIPRoutingRule instance
 * @to: (allow-none): the to/dst address to set.
 *   The address family must match.
 * @len: the corresponding prefix length of the address.
 *   If @to is %NULL, this valid is ignored.
 *
 * Setting invalid values is accepted, but will later fail
 * during nm_ip_routing_rule_validate().
 *
 * Since: 1.18
 */
void
nm_ip_routing_rule_set_to(NMIPRoutingRule *self, const char *to, guint8 len)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    if (!to) {
        nm_clear_g_free(&self->to_str);
        self->to_has = FALSE;
        self->to_len = len;
        return;
    }

    nm_clear_g_free(&self->to_str);
    self->to_has = TRUE;
    self->to_len = len;
    self->to_valid =
        nm_utils_parse_inaddr_bin(_ip_routing_rule_get_addr_family(self), to, NULL, &self->to_bin);
    if (!self->to_valid)
        self->to_str = g_strdup(to);
}

/**
 * nm_ip_routing_rule_get_tos:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the tos of the rule.
 *
 * Since: 1.18
 */
guint8
nm_ip_routing_rule_get_tos(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), 0);

    return self->tos;
}

/**
 * nm_ip_routing_rule_set_tos:
 * @self: the #NMIPRoutingRule instance
 * @tos: the tos to set
 *
 * Since: 1.18
 */
void
nm_ip_routing_rule_set_tos(NMIPRoutingRule *self, guint8 tos)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    self->tos = tos;
}

/**
 * nm_ip_routing_rule_get_ipproto:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the ipproto of the rule.
 *
 * Since: 1.18
 */
guint8
nm_ip_routing_rule_get_ipproto(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), 0);

    return self->ipproto;
}

/**
 * nm_ip_routing_rule_set_ipproto:
 * @self: the #NMIPRoutingRule instance
 * @ipproto: the ipproto to set
 *
 * Since: 1.18
 */
void
nm_ip_routing_rule_set_ipproto(NMIPRoutingRule *self, guint8 ipproto)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    self->ipproto = ipproto;
}

/**
 * nm_ip_routing_rule_get_source_port_start:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the source port start setting.
 *
 * Since: 1.18
 */
guint16
nm_ip_routing_rule_get_source_port_start(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), 0);

    return self->sport_start;
}

/**
 * nm_ip_routing_rule_get_source_port_end:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the source port end setting.
 *
 * Since: 1.18
 */
guint16
nm_ip_routing_rule_get_source_port_end(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), 0);

    return self->sport_end;
}

/**
 * nm_ip_routing_rule_set_source_port:
 * @self: the #NMIPRoutingRule instance
 * @start: the start port to set.
 * @end: the end port to set.
 *
 * Since: 1.18
 */
void
nm_ip_routing_rule_set_source_port(NMIPRoutingRule *self, guint16 start, guint16 end)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    self->sport_start = start;
    self->sport_end   = end;
}

/**
 * nm_ip_routing_rule_get_destination_port_start:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the destination port start setting.
 *
 * Since: 1.18
 */
guint16
nm_ip_routing_rule_get_destination_port_start(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), 0);

    return self->dport_start;
}

/**
 * nm_ip_routing_rule_get_destination_port_end:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the destination port end setting.
 *
 * Since: 1.18
 */
guint16
nm_ip_routing_rule_get_destination_port_end(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), 0);

    return self->dport_end;
}

/**
 * nm_ip_routing_rule_set_destination_port:
 * @self: the #NMIPRoutingRule instance
 * @start: the start port to set.
 * @end: the end port to set.
 *
 * Since: 1.18
 */
void
nm_ip_routing_rule_set_destination_port(NMIPRoutingRule *self, guint16 start, guint16 end)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    self->dport_start = start;
    self->dport_end   = end;
}

/**
 * nm_ip_routing_rule_get_fwmark:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the fwmark setting.
 *
 * Since: 1.18
 */
guint32
nm_ip_routing_rule_get_fwmark(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), 0);

    return self->fwmark;
}

/**
 * nm_ip_routing_rule_get_fwmask:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the fwmask setting.
 *
 * Since: 1.18
 */
guint32
nm_ip_routing_rule_get_fwmask(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), 0);

    return self->fwmask;
}

/**
 * nm_ip_routing_rule_set_fwmark:
 * @self: the #NMIPRoutingRule instance
 * @fwmark: the fwmark
 * @fwmask: the fwmask
 *
 * Since: 1.18
 */
void
nm_ip_routing_rule_set_fwmark(NMIPRoutingRule *self, guint32 fwmark, guint32 fwmask)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    self->fwmark = fwmark;
    self->fwmask = fwmask;
}

/**
 * nm_ip_routing_rule_get_iifname:
 * @self: the #NMIPRoutingRule instance.
 *
 * Returns: (transfer none): the set iifname or %NULL if unset.
 *
 * Since: 1.18
 */
const char *
nm_ip_routing_rule_get_iifname(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), NULL);

    return self->iifname;
}

gboolean
nm_ip_routing_rule_get_xifname_bin(const NMIPRoutingRule *self,
                                   gboolean               iif /* or else oif */,
                                   char                   out_xifname[static 16 /* IFNAMSIZ */])
{
    gs_free gpointer bin_to_free = NULL;
    const char *     xifname;
    gconstpointer    bin;
    gsize            len;

    nm_assert(NM_IS_IP_ROUTING_RULE(self, TRUE));
    nm_assert(out_xifname);

    xifname = iif ? self->iifname : self->oifname;

    if (!xifname)
        return FALSE;

    bin = nm_utils_buf_utf8safe_unescape(xifname,
                                         NM_UTILS_STR_UTF8_SAFE_FLAG_NONE,
                                         &len,
                                         &bin_to_free);

    strncpy(out_xifname, bin, 16 /* IFNAMSIZ */);
    out_xifname[15] = '\0';
    return TRUE;
}

/**
 * nm_ip_routing_rule_set_iifname:
 * @self: the #NMIPRoutingRule instance.
 * @iifname: (allow-none): the iifname to set or %NULL to unset.
 *
 * The name supports C backslash escaping for non-UTF-8 characters.
 * Note that nm_ip_routing_rule_from_string() too uses backslash
 * escaping when tokenizing the words by whitespace. So, in string
 * representation you'd get double backslashes.
 *
 * Since: 1.18
 */
void
nm_ip_routing_rule_set_iifname(NMIPRoutingRule *self, const char *iifname)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    g_free(self->iifname);
    self->iifname = g_strdup(iifname);
}

/**
 * nm_ip_routing_rule_get_oifname:
 * @self: the #NMIPRoutingRule instance.
 *
 * Returns: (transfer none): the set oifname or %NULL if unset.
 *
 * Since: 1.18
 */
const char *
nm_ip_routing_rule_get_oifname(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), NULL);

    return self->oifname;
}

/**
 * nm_ip_routing_rule_set_oifname:
 * @self: the #NMIPRoutingRule instance.
 * @oifname: (allow-none): the oifname to set or %NULL to unset.
 *
 * The name supports C backslash escaping for non-UTF-8 characters.
 * Note that nm_ip_routing_rule_from_string() too uses backslash
 * escaping when tokenizing the words by whitespace. So, in string
 * representation you'd get double backslashes.
 *
 * Since: 1.18
 */
void
nm_ip_routing_rule_set_oifname(NMIPRoutingRule *self, const char *oifname)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    g_free(self->oifname);
    self->oifname = g_strdup(oifname);
}

/**
 * nm_ip_routing_rule_get_action:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the set action.
 *
 * Since: 1.18
 */
guint8
nm_ip_routing_rule_get_action(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), 0);

    return self->action;
}

/**
 * nm_ip_routing_rule_set_action:
 * @self: the #NMIPRoutingRule instance
 * @action: the action to set
 *
 * Note that currently only certain actions are allowed. nm_ip_routing_rule_validate()
 * will reject unsupported actions as invalid.
 *
 * Since: 1.18
 */
void
nm_ip_routing_rule_set_action(NMIPRoutingRule *self, guint8 action)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    self->action = action;
}

/**
 * nm_ip_routing_rule_get_table:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the set table.
 *
 * Since: 1.18
 */
guint32
nm_ip_routing_rule_get_table(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), 0);

    return self->table;
}

/**
 * nm_ip_routing_rule_set_table:
 * @self: the #NMIPRoutingRule instance
 * @table: the table to set
 *
 * Since: 1.18
 */
void
nm_ip_routing_rule_set_table(NMIPRoutingRule *self, guint32 table)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    self->table = table;
}

/**
 * nm_ip_routing_rule_get_suppress_prefixlength:
 * @self: the #NMIPRoutingRule instance
 *
 * Returns: the suppress_prefixlength of the rule. -1 means that the value is unset.
 *
 * Since: 1.20
 */
gint32
nm_ip_routing_rule_get_suppress_prefixlength(const NMIPRoutingRule *self)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), -1);

    return self->suppress_prefixlength;
}

/**
 * nm_ip_routing_rule_set_suppress_prefixlength:
 * @self: the #NMIPRoutingRule instance
 * @suppress_prefixlength: the suppress_prefixlength to set. The value -1 means
 *   unset.
 *
 * Since: 1.20
 */
void
nm_ip_routing_rule_set_suppress_prefixlength(NMIPRoutingRule *self, gint32 suppress_prefixlength)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    self->suppress_prefixlength = suppress_prefixlength;
}

/**
 * nm_ip_routing_rule_get_uid_range:
 * @self: the #NMIPRoutingRule instance
 * @out_range_start: (out) (allow-none): returns the start of the range
 *   or 0 if the range is not set.
 * @out_range_end: (out) (allow-none): returns the end of the range
 *   or 0 if the range is not set.
 *
 * Returns: %TRUE if a uid range is set.
 *
 * Since: 1.32. Due to a bug, the symbols of this function
 *   are only exported starting with version 1.34.0. The function
 *   is unusable in 1.32.
 */
gboolean
nm_ip_routing_rule_get_uid_range(const NMIPRoutingRule *self,
                                 guint32 *              out_range_start,
                                 guint32 *              out_range_end)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), -1);

    nm_assert(self->uid_range_has || (self->uid_range_start == 0 && self->uid_range_end == 0));

    NM_SET_OUT(out_range_start, self->uid_range_start);
    NM_SET_OUT(out_range_end, self->uid_range_end);
    return self->uid_range_has;
}

/**
 * nm_ip_routing_rule_set_uid_range:
 * @self: the #NMIPRoutingRule instance
 * @uid_range_start: the uid_range start to set.
 * @uid_range_end: the uid_range start to set.
 *
 * For a valid range, start must be less or equal to end.
 * If set to an invalid range, the range gets unset.
 *
 * Since: 1.32. Due to a bug, the symbols of this function
 *   are only exported starting with version 1.34.0. The function
 *   is unusable in 1.32.
 */
void
nm_ip_routing_rule_set_uid_range(NMIPRoutingRule *self,
                                 guint32          uid_range_start,
                                 guint32          uid_range_end)
{
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(self, FALSE));

    if (uid_range_start > uid_range_end) {
        self->uid_range_start = 0;
        self->uid_range_end   = 0;
        self->uid_range_has   = FALSE;
        return;
    }
    self->uid_range_start = uid_range_start;
    self->uid_range_end   = uid_range_end;
    self->uid_range_has   = TRUE;
}

/**
 * nm_ip_routing_rule_cmp:
 * @rule: (allow-none): the #NMIPRoutingRule instance to compare
 * @other: (allow-none): the other #NMIPRoutingRule instance to compare
 *
 * Returns: zero, a positive, or a negative integer to indicate
 *   equality or how the arguments compare.
 *
 * Since: 1.18
 */
int
nm_ip_routing_rule_cmp(const NMIPRoutingRule *rule, const NMIPRoutingRule *other)
{
    NM_CMP_SELF(rule, other);

    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(rule, TRUE), 0);
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(other, TRUE), 0);

    NM_CMP_FIELD_UNSAFE(rule, other, priority_has);
    if (rule->priority_has)
        NM_CMP_FIELD(rule, other, priority);

    NM_CMP_FIELD_UNSAFE(rule, other, is_v4);

    NM_CMP_FIELD_UNSAFE(rule, other, invert);

    NM_CMP_FIELD(rule, other, tos);

    NM_CMP_FIELD(rule, other, fwmark);
    NM_CMP_FIELD(rule, other, fwmask);

    NM_CMP_FIELD(rule, other, action);

    NM_CMP_FIELD(rule, other, table);

    NM_CMP_FIELD(rule, other, suppress_prefixlength);

    NM_CMP_FIELD(rule, other, sport_start);
    NM_CMP_FIELD(rule, other, sport_end);
    NM_CMP_FIELD(rule, other, dport_start);
    NM_CMP_FIELD(rule, other, dport_end);

    NM_CMP_FIELD(rule, other, ipproto);

    NM_CMP_FIELD_UNSAFE(rule, other, uid_range_has);
    if (rule->uid_range_has) {
        NM_CMP_FIELD(rule, other, uid_range_end);
        NM_CMP_FIELD(rule, other, uid_range_start);
    }

    /* We compare the plain strings, not the binary values after utf8safe unescaping.
     *
     * The reason is, that the rules differ already when the direct strings differ, not
     * only when the unescaped names differ. */
    NM_CMP_FIELD_STR0(rule, other, iifname);
    NM_CMP_FIELD_STR0(rule, other, oifname);

    NM_CMP_FIELD(rule, other, from_len);

    NM_CMP_FIELD_UNSAFE(rule, other, from_has);
    if (rule->from_has) {
        NM_CMP_FIELD_UNSAFE(rule, other, from_valid);
        if (rule->from_valid) {
            NM_CMP_RETURN(
                memcmp(&rule->from_bin, &other->from_bin, _ip_routing_rule_get_addr_size(rule)));
        } else
            NM_CMP_FIELD_STR(rule, other, from_str);
    }

    NM_CMP_FIELD(rule, other, to_len);

    NM_CMP_FIELD_UNSAFE(rule, other, to_has);
    if (rule->to_has) {
        NM_CMP_FIELD_UNSAFE(rule, other, to_valid);
        if (rule->to_valid) {
            NM_CMP_RETURN(
                memcmp(&rule->to_bin, &other->to_bin, _ip_routing_rule_get_addr_size(rule)));
        } else
            NM_CMP_FIELD_STR(rule, other, to_str);
    }

    return 0;
}

static gboolean
_rr_xport_range_valid(guint16 xport_start, guint16 xport_end)
{
    if (xport_start == 0)
        return (xport_end == 0);

    return xport_start <= xport_end && xport_end < 0xFFFFu;
}

static gboolean
_rr_xport_range_parse(char *str, gint64 *out_start, guint16 *out_end)
{
    guint16 start, end;
    gint64  i64;
    char *  s;

    s = strchr(str, '-');
    if (s)
        *(s++) = '\0';

    i64 = _nm_utils_ascii_str_to_int64(str, 10, 0, 0xFFFF, -1);
    if (i64 == -1)
        return FALSE;

    start = i64;
    if (s) {
        i64 = _nm_utils_ascii_str_to_int64(s, 10, 0, 0xFFFF, -1);
        if (i64 == -1)
            return FALSE;
        end = i64;
    } else
        end = start;

    *out_start = start;
    *out_end   = end;
    return TRUE;
}

/**
 * nm_ip_routing_rule_validate:
 * @self: the #NMIPRoutingRule instance to validate
 * @error: (allow-none) (out): the error result if validation fails.
 *
 * Returns: %TRUE if the rule validates.
 *
 * Since: 1.18
 */
gboolean
nm_ip_routing_rule_validate(const NMIPRoutingRule *self, GError **error)
{
    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), FALSE);
    g_return_val_if_fail(!error || !*error, FALSE);

    /* Kernel may be more flexible about validating. We do a strict validation
     * here and reject certain settings eagerly. We can always relax it later. */

    if (!self->priority_has) {
        /* iproute2 accepts not specifying the priority, in which case kernel will select
         * an unused priority. We don't allow for that, and will always require the user to
         * select a priority.
         *
         * Note that if the user selects priority 0 or a non-unique priority, this is problematic
         * due to kernel bugs rh#1685816 and rh#1685816. It may result in NetworkManager wrongly being
         * unable to add a rule or deleting the wrong rule.
         * This problem is not at all specific to the priority, it affects all rules that
         * have default values which confuse kernel. But setting a unique priority avoids
         * this problem nicely. */
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("invalid priority"));
        return FALSE;
    }

    if (NM_IN_SET(self->action, FR_ACT_TO_TBL)) {
        if (self->table == 0) {
            /* with IPv4, kernel allows a table (in RTM_NEWRULE) of zero to automatically select
             * an unused table. We don't. The user needs to specify the table.
             *
             * For IPv6, kernel doesn't allow a table of zero, so we are consistent here. */
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_PROPERTY,
                                _("missing table"));
            return FALSE;
        }
    } else if (NM_IN_SET(self->action, FR_ACT_BLACKHOLE, FR_ACT_PROHIBIT, FR_ACT_UNREACHABLE)) {
        /* pass */
    } else {
        /* we currently only support the listed actions. */
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("invalid action type"));
        return FALSE;
    }

    if (self->from_len == 0) {
        if (self->from_has) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_PROPERTY,
                                _("has from/src but the prefix-length is zero"));
            return FALSE;
        }
    } else if (self->from_len > 0 && self->from_len <= 8 * _ip_routing_rule_get_addr_size(self)) {
        if (!self->from_has) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_PROPERTY,
                                _("missing from/src for a non zero prefix-length"));
            return FALSE;
        }
        if (!self->from_valid) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_PROPERTY,
                                _("invalid from/src"));
            return FALSE;
        }
    } else {
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("invalid prefix length for from/src"));
        return FALSE;
    }

    if (self->to_len == 0) {
        if (self->to_has) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_PROPERTY,
                                _("has to/dst but the prefix-length is zero"));
            return FALSE;
        }
    } else if (self->to_len > 0 && self->to_len <= 8 * _ip_routing_rule_get_addr_size(self)) {
        if (!self->to_has) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_PROPERTY,
                                _("missing to/dst for a non zero prefix-length"));
            return FALSE;
        }
        if (!self->to_valid) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_PROPERTY,
                                _("invalid to/dst"));
            return FALSE;
        }
    } else {
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("invalid prefix length for to/dst"));
        return FALSE;
    }

    if (self->iifname
        && (!g_utf8_validate(self->iifname, -1, NULL)
            || !nm_utils_is_valid_iface_name_utf8safe(self->iifname))) {
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("invalid iifname"));
        return FALSE;
    }

    if (self->oifname
        && (!g_utf8_validate(self->oifname, -1, NULL)
            || !nm_utils_is_valid_iface_name_utf8safe(self->oifname))) {
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("invalid oifname"));
        return FALSE;
    }

    if (!_rr_xport_range_valid(self->sport_start, self->sport_end)) {
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("invalid source port range"));
        return FALSE;
    }

    if (!_rr_xport_range_valid(self->dport_start, self->dport_end)) {
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("invalid destination port range"));
        return FALSE;
    }

    if (self->suppress_prefixlength != -1) {
        if (self->suppress_prefixlength < -1
            || self->suppress_prefixlength > (self->is_v4 ? 32 : 128)) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_PROPERTY,
                                _("suppress_prefixlength out of range"));
            return FALSE;
        }
        if (self->action != FR_ACT_TO_TBL) {
            g_set_error_literal(
                error,
                NM_CONNECTION_ERROR,
                NM_CONNECTION_ERROR_INVALID_PROPERTY,
                _("suppress_prefixlength is only allowed with the to-table action"));
            return FALSE;
        }
    }

    return TRUE;
}

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

typedef enum {
    RR_DBUS_ATTR_ACTION,
    RR_DBUS_ATTR_DPORT_END,
    RR_DBUS_ATTR_DPORT_START,
    RR_DBUS_ATTR_FAMILY,
    RR_DBUS_ATTR_FROM,
    RR_DBUS_ATTR_FROM_LEN,
    RR_DBUS_ATTR_FWMARK,
    RR_DBUS_ATTR_FWMASK,
    RR_DBUS_ATTR_IIFNAME,
    RR_DBUS_ATTR_INVERT,
    RR_DBUS_ATTR_IPPROTO,
    RR_DBUS_ATTR_OIFNAME,
    RR_DBUS_ATTR_PRIORITY,
    RR_DBUS_ATTR_SPORT_END,
    RR_DBUS_ATTR_SPORT_START,
    RR_DBUS_ATTR_SUPPRESS_PREFIXLENGTH,
    RR_DBUS_ATTR_TABLE,
    RR_DBUS_ATTR_TO,
    RR_DBUS_ATTR_TO_LEN,
    RR_DBUS_ATTR_TOS,
    RR_DBUS_ATTR_UID_RANGE_END,
    RR_DBUS_ATTR_UID_RANGE_START,

    _RR_DBUS_ATTR_NUM,
} RRDbusAttr;

typedef struct {
    const char *        name;
    const GVariantType *dbus_type;
} RRDbusData;

static const RRDbusData rr_dbus_data[_RR_DBUS_ATTR_NUM] = {
#define _D(attr, _name, type) \
    [attr] = {                \
        .name      = _name,   \
        .dbus_type = type,    \
    }
    _D(RR_DBUS_ATTR_ACTION, NM_IP_ROUTING_RULE_ATTR_ACTION, G_VARIANT_TYPE_BYTE),
    _D(RR_DBUS_ATTR_DPORT_END, NM_IP_ROUTING_RULE_ATTR_DPORT_END, G_VARIANT_TYPE_UINT16),
    _D(RR_DBUS_ATTR_DPORT_START, NM_IP_ROUTING_RULE_ATTR_DPORT_START, G_VARIANT_TYPE_UINT16),
    _D(RR_DBUS_ATTR_FAMILY, NM_IP_ROUTING_RULE_ATTR_FAMILY, G_VARIANT_TYPE_INT32),
    _D(RR_DBUS_ATTR_FROM, NM_IP_ROUTING_RULE_ATTR_FROM, G_VARIANT_TYPE_STRING),
    _D(RR_DBUS_ATTR_FROM_LEN, NM_IP_ROUTING_RULE_ATTR_FROM_LEN, G_VARIANT_TYPE_BYTE),
    _D(RR_DBUS_ATTR_FWMARK, NM_IP_ROUTING_RULE_ATTR_FWMARK, G_VARIANT_TYPE_UINT32),
    _D(RR_DBUS_ATTR_FWMASK, NM_IP_ROUTING_RULE_ATTR_FWMASK, G_VARIANT_TYPE_UINT32),
    _D(RR_DBUS_ATTR_IIFNAME, NM_IP_ROUTING_RULE_ATTR_IIFNAME, G_VARIANT_TYPE_STRING),
    _D(RR_DBUS_ATTR_INVERT, NM_IP_ROUTING_RULE_ATTR_INVERT, G_VARIANT_TYPE_BOOLEAN),
    _D(RR_DBUS_ATTR_IPPROTO, NM_IP_ROUTING_RULE_ATTR_IPPROTO, G_VARIANT_TYPE_BYTE),
    _D(RR_DBUS_ATTR_OIFNAME, NM_IP_ROUTING_RULE_ATTR_OIFNAME, G_VARIANT_TYPE_STRING),
    _D(RR_DBUS_ATTR_PRIORITY, NM_IP_ROUTING_RULE_ATTR_PRIORITY, G_VARIANT_TYPE_UINT32),
    _D(RR_DBUS_ATTR_SPORT_END, NM_IP_ROUTING_RULE_ATTR_SPORT_END, G_VARIANT_TYPE_UINT16),
    _D(RR_DBUS_ATTR_SPORT_START, NM_IP_ROUTING_RULE_ATTR_SPORT_START, G_VARIANT_TYPE_UINT16),
    _D(RR_DBUS_ATTR_SUPPRESS_PREFIXLENGTH,
       NM_IP_ROUTING_RULE_ATTR_SUPPRESS_PREFIXLENGTH,
       G_VARIANT_TYPE_INT32),
    _D(RR_DBUS_ATTR_TABLE, NM_IP_ROUTING_RULE_ATTR_TABLE, G_VARIANT_TYPE_UINT32),
    _D(RR_DBUS_ATTR_TO, NM_IP_ROUTING_RULE_ATTR_TO, G_VARIANT_TYPE_STRING),
    _D(RR_DBUS_ATTR_TOS, NM_IP_ROUTING_RULE_ATTR_TOS, G_VARIANT_TYPE_BYTE),
    _D(RR_DBUS_ATTR_TO_LEN, NM_IP_ROUTING_RULE_ATTR_TO_LEN, G_VARIANT_TYPE_BYTE),
    _D(RR_DBUS_ATTR_UID_RANGE_END, NM_IP_ROUTING_RULE_ATTR_UID_RANGE_END, G_VARIANT_TYPE_UINT32),
    _D(RR_DBUS_ATTR_UID_RANGE_START,
       NM_IP_ROUTING_RULE_ATTR_UID_RANGE_START,
       G_VARIANT_TYPE_UINT32),
#undef _D
};

static RRDbusAttr
_rr_dbus_attr_from_name(const char *name)
{
    gssize idx;

    nm_assert(name);

    if (NM_MORE_ASSERT_ONCE(10)) {
        int i;

        for (i = 0; i < _RR_DBUS_ATTR_NUM; i++) {
            nm_assert(rr_dbus_data[i].name);
            nm_assert(g_variant_type_string_is_valid((const char *) rr_dbus_data[i].dbus_type));
            if (i > 0)
                nm_assert(strcmp(rr_dbus_data[i - 1].name, rr_dbus_data[i].name) < 0);
        }
    }

    idx = nm_utils_array_find_binary_search(rr_dbus_data,
                                            sizeof(rr_dbus_data[0]),
                                            _RR_DBUS_ATTR_NUM,
                                            &name,
                                            nm_strcmp_p_with_data,
                                            NULL);
    if (idx < 0)
        return _RR_DBUS_ATTR_NUM;
    return idx;
}

static void
_rr_variants_free(GVariant *(*p_variants)[])
{
    int i;

    for (i = 0; i < _RR_DBUS_ATTR_NUM; i++) {
        if ((*p_variants)[i])
            g_variant_unref((*p_variants)[i]);
    }
}

NMIPRoutingRule *
nm_ip_routing_rule_from_dbus(GVariant *variant, gboolean strict, GError **error)
{
    nm_auto(_rr_variants_free) GVariant *variants[_RR_DBUS_ATTR_NUM] = {};
    nm_auto_unref_ip_routing_rule NMIPRoutingRule *self              = NULL;
    RRDbusAttr                                     attr;
    GVariantIter                                   iter;
    const char *                                   iter_key;
    GVariant *                                     iter_val;
    int                                            addr_family;
    int                                            i;
    GVariant *                                     v_start;
    GVariant *                                     v_end;

    g_variant_iter_init(&iter, variant);

    while (g_variant_iter_next(&iter, "{&sv}", &iter_key, &iter_val)) {
        gs_unref_variant GVariant *iter_val2 = iter_val;

        attr = _rr_dbus_attr_from_name(iter_key);

        if (attr >= _RR_DBUS_ATTR_NUM) {
            if (strict) {
                g_set_error(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("invalid key \"%s\""),
                            iter_key);
                return NULL;
            }
            continue;
        }

        if (variants[attr]) {
            if (strict) {
                g_set_error(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_FAILED,
                            _("duplicate key %s"),
                            iter_key);
                return NULL;
            }
            g_variant_unref(variants[attr]);
        }
        variants[attr] = g_steal_pointer(&iter_val2);
    }

    for (attr = 0; attr < _RR_DBUS_ATTR_NUM; attr++) {
        if (!variants[attr])
            continue;
        if (!g_variant_is_of_type(variants[attr], rr_dbus_data[attr].dbus_type)) {
            g_set_error(error,
                        NM_CONNECTION_ERROR,
                        NM_CONNECTION_ERROR_INVALID_PROPERTY,
                        _("invalid variant type '%s' for \"%s\""),
                        (const char *) rr_dbus_data[attr].dbus_type,
                        rr_dbus_data[attr].name);
            return NULL;
        }
    }

    if (!variants[RR_DBUS_ATTR_FAMILY]) {
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("missing \"family\""));
        return NULL;
    }
    addr_family = g_variant_get_int32(variants[RR_DBUS_ATTR_FAMILY]);
    if (!NM_IN_SET(addr_family, AF_INET, AF_INET6)) {
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("invalid \"family\""));
        return NULL;
    }

    self = nm_ip_routing_rule_new(addr_family);

    if (variants[RR_DBUS_ATTR_PRIORITY])
        nm_ip_routing_rule_set_priority(self,
                                        g_variant_get_uint32(variants[RR_DBUS_ATTR_PRIORITY]));

    if (variants[RR_DBUS_ATTR_INVERT])
        nm_ip_routing_rule_set_invert(self, g_variant_get_boolean(variants[RR_DBUS_ATTR_INVERT]));

    if (variants[RR_DBUS_ATTR_TOS])
        nm_ip_routing_rule_set_tos(self, g_variant_get_byte(variants[RR_DBUS_ATTR_TOS]));

    if (variants[RR_DBUS_ATTR_IPPROTO])
        nm_ip_routing_rule_set_ipproto(self, g_variant_get_byte(variants[RR_DBUS_ATTR_IPPROTO]));

    for (i = 0; i < 2; i++) {
        guint16 start, end;

        v_start = variants[i ? RR_DBUS_ATTR_SPORT_START : RR_DBUS_ATTR_DPORT_START];
        v_end   = variants[i ? RR_DBUS_ATTR_SPORT_END : RR_DBUS_ATTR_DPORT_END];
        if (!v_start && !v_end)
            continue;

        /* if start or end is missing, it defaults to the other parameter, respectively. */
        start = g_variant_get_uint16(v_start ?: v_end);
        if (v_end && v_start)
            end = g_variant_get_uint16(v_end);
        else
            end = start;

        if (i)
            nm_ip_routing_rule_set_source_port(self, start, end);
        else
            nm_ip_routing_rule_set_destination_port(self, start, end);
    }

    v_start = variants[RR_DBUS_ATTR_UID_RANGE_START];
    v_end   = variants[RR_DBUS_ATTR_UID_RANGE_END];
    if (v_start || v_end) {
        guint32 start, end;

        /* if start or end is missing, it defaults to the other parameter, respectively. */
        start = g_variant_get_uint32(v_start ?: v_end);
        if (v_end && v_start)
            end = g_variant_get_uint32(v_end);
        else
            end = start;

        if (end < start) {
            if (strict) {
                g_set_error_literal(error,
                                    NM_CONNECTION_ERROR,
                                    NM_CONNECTION_ERROR_INVALID_PROPERTY,
                                    _("\"uid-range-start\" is greater than \"uid-range-end\""));
                return FALSE;
            }
        } else
            nm_ip_routing_rule_set_uid_range(self, start, end);
    }

    if (variants[RR_DBUS_ATTR_FWMARK] || variants[RR_DBUS_ATTR_FWMASK]) {
        nm_ip_routing_rule_set_fwmark(
            self,
            variants[RR_DBUS_ATTR_FWMARK] ? g_variant_get_uint32(variants[RR_DBUS_ATTR_FWMARK])
                                          : 0u,
            variants[RR_DBUS_ATTR_FWMASK] ? g_variant_get_uint32(variants[RR_DBUS_ATTR_FWMASK])
                                          : 0u);
    }

    if (variants[RR_DBUS_ATTR_FROM] || variants[RR_DBUS_ATTR_FROM_LEN]) {
        nm_ip_routing_rule_set_from(
            self,
            variants[RR_DBUS_ATTR_FROM] ? g_variant_get_string(variants[RR_DBUS_ATTR_FROM], NULL)
                                        : NULL,
            variants[RR_DBUS_ATTR_FROM_LEN] ? g_variant_get_byte(variants[RR_DBUS_ATTR_FROM_LEN])
                                            : 0u);
    }

    if (variants[RR_DBUS_ATTR_TO] || variants[RR_DBUS_ATTR_TO_LEN]) {
        nm_ip_routing_rule_set_to(
            self,
            variants[RR_DBUS_ATTR_TO] ? g_variant_get_string(variants[RR_DBUS_ATTR_TO], NULL)
                                      : NULL,
            variants[RR_DBUS_ATTR_TO_LEN] ? g_variant_get_byte(variants[RR_DBUS_ATTR_TO_LEN]) : 0u);
    }

    if (variants[RR_DBUS_ATTR_IIFNAME])
        nm_ip_routing_rule_set_iifname(self,
                                       g_variant_get_string(variants[RR_DBUS_ATTR_IIFNAME], NULL));

    if (variants[RR_DBUS_ATTR_OIFNAME])
        nm_ip_routing_rule_set_oifname(self,
                                       g_variant_get_string(variants[RR_DBUS_ATTR_OIFNAME], NULL));

    /* For the ip-rule string format, the table default depends on the action. For
     * our D-Bus format it's always the same: either a table is specified or it defaults
     * to zero. And either the action is specified or it defaults to FR_ACT_TO_TBL. */
    nm_ip_routing_rule_set_action(self,
                                  !variants[RR_DBUS_ATTR_ACTION]
                                      ? (guint8) FR_ACT_TO_TBL
                                      : g_variant_get_byte(variants[RR_DBUS_ATTR_ACTION]));
    nm_ip_routing_rule_set_table(self,
                                 !variants[RR_DBUS_ATTR_TABLE]
                                     ? (guint32) 0
                                     : g_variant_get_uint32(variants[RR_DBUS_ATTR_TABLE]));

    if (variants[RR_DBUS_ATTR_SUPPRESS_PREFIXLENGTH])
        nm_ip_routing_rule_set_suppress_prefixlength(
            self,
            g_variant_get_int32(variants[RR_DBUS_ATTR_SUPPRESS_PREFIXLENGTH]));

    if (strict && !nm_ip_routing_rule_validate(self, error))
        return NULL;

    return g_steal_pointer(&self);
}

static void
_rr_to_dbus_add(GVariantBuilder *builder, RRDbusAttr attr, GVariant *value)
{
    nm_assert(builder);
    nm_assert(value);
    nm_assert(g_variant_is_floating(value));
    nm_assert(g_variant_is_of_type(value, rr_dbus_data[attr].dbus_type));

    g_variant_builder_add(builder, "{sv}", rr_dbus_data[attr].name, value);
}

GVariant *
nm_ip_routing_rule_to_dbus(const NMIPRoutingRule *self)
{
    GVariantBuilder builder;
    char            addr_str[NM_UTILS_INET_ADDRSTRLEN];

    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), NULL);

    g_variant_builder_init(&builder, G_VARIANT_TYPE_VARDICT);

    _rr_to_dbus_add(&builder,
                    RR_DBUS_ATTR_FAMILY,
                    g_variant_new_int32(_ip_routing_rule_get_addr_family(self)));

    if (self->invert)
        _rr_to_dbus_add(&builder, RR_DBUS_ATTR_INVERT, g_variant_new_boolean(TRUE));

    if (self->priority_has)
        _rr_to_dbus_add(&builder, RR_DBUS_ATTR_PRIORITY, g_variant_new_uint32(self->priority));

    if (self->tos != 0)
        _rr_to_dbus_add(&builder, RR_DBUS_ATTR_TOS, g_variant_new_byte(self->tos));

    if (self->ipproto != 0)
        _rr_to_dbus_add(&builder, RR_DBUS_ATTR_IPPROTO, g_variant_new_byte(self->ipproto));

    if (self->fwmark != 0)
        _rr_to_dbus_add(&builder, RR_DBUS_ATTR_FWMARK, g_variant_new_uint32(self->fwmark));

    if (self->fwmask != 0)
        _rr_to_dbus_add(&builder, RR_DBUS_ATTR_FWMASK, g_variant_new_uint32(self->fwmask));

    if (self->sport_start != 0 || self->sport_end != 0) {
        _rr_to_dbus_add(&builder,
                        RR_DBUS_ATTR_SPORT_START,
                        g_variant_new_uint16(self->sport_start));
        if (self->sport_start != self->sport_end)
            _rr_to_dbus_add(&builder,
                            RR_DBUS_ATTR_SPORT_END,
                            g_variant_new_uint16(self->sport_end));
    }

    if (self->dport_start != 0 || self->dport_end != 0) {
        _rr_to_dbus_add(&builder,
                        RR_DBUS_ATTR_DPORT_START,
                        g_variant_new_uint16(self->dport_start));
        if (self->dport_start != self->dport_end)
            _rr_to_dbus_add(&builder,
                            RR_DBUS_ATTR_DPORT_END,
                            g_variant_new_uint16(self->dport_end));
    }

    if (self->from_has || self->from_len != 0) {
        _rr_to_dbus_add(
            &builder,
            RR_DBUS_ATTR_FROM,
            g_variant_new_string(self->from_str
                                     ?: nm_utils_inet_ntop(_ip_routing_rule_get_addr_family(self),
                                                           &self->from_bin,
                                                           addr_str)));
        _rr_to_dbus_add(&builder, RR_DBUS_ATTR_FROM_LEN, g_variant_new_byte(self->from_len));
    }

    if (self->to_has || self->to_len != 0) {
        _rr_to_dbus_add(
            &builder,
            RR_DBUS_ATTR_TO,
            g_variant_new_string(self->to_str
                                     ?: nm_utils_inet_ntop(_ip_routing_rule_get_addr_family(self),
                                                           &self->to_bin,
                                                           addr_str)));
        _rr_to_dbus_add(&builder, RR_DBUS_ATTR_TO_LEN, g_variant_new_byte(self->to_len));
    }

    if (self->iifname)
        _rr_to_dbus_add(&builder, RR_DBUS_ATTR_IIFNAME, g_variant_new_string(self->iifname));

    if (self->oifname)
        _rr_to_dbus_add(&builder, RR_DBUS_ATTR_OIFNAME, g_variant_new_string(self->oifname));

    if (self->action != FR_ACT_TO_TBL)
        _rr_to_dbus_add(&builder, RR_DBUS_ATTR_ACTION, g_variant_new_byte(self->action));

    if (self->table != 0)
        _rr_to_dbus_add(&builder, RR_DBUS_ATTR_TABLE, g_variant_new_uint32(self->table));

    if (self->suppress_prefixlength != -1)
        _rr_to_dbus_add(&builder,
                        RR_DBUS_ATTR_SUPPRESS_PREFIXLENGTH,
                        g_variant_new_int32(self->suppress_prefixlength));

    if (self->uid_range_has) {
        _rr_to_dbus_add(&builder,
                        RR_DBUS_ATTR_UID_RANGE_START,
                        g_variant_new_uint32(self->uid_range_start));
        if (self->uid_range_start != self->uid_range_end)
            _rr_to_dbus_add(&builder,
                            RR_DBUS_ATTR_UID_RANGE_END,
                            g_variant_new_uint32(self->uid_range_end));
    }

    return g_variant_builder_end(&builder);
}

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

static gboolean
_rr_string_validate(gboolean                     for_from /* or else to-string */,
                    NMIPRoutingRuleAsStringFlags to_string_flags,
                    GHashTable *                 extra_args,
                    GError **                    error)
{
    if (NM_FLAGS_ANY(to_string_flags,
                     ~(NM_IP_ROUTING_RULE_AS_STRING_FLAGS_AF_INET
                       | NM_IP_ROUTING_RULE_AS_STRING_FLAGS_AF_INET6
                       | NM_IP_ROUTING_RULE_AS_STRING_FLAGS_VALIDATE))) {
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_FAILED,
                            _("Unsupported to-string-flags argument"));
        return FALSE;
    }

    if (extra_args && g_hash_table_size(extra_args) > 0) {
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_FAILED,
                            _("Unsupported extra-argument"));
        return FALSE;
    }

    return TRUE;
}

static int
_rr_string_addr_family_from_flags(NMIPRoutingRuleAsStringFlags to_string_flags)
{
    if (NM_FLAGS_HAS(to_string_flags, NM_IP_ROUTING_RULE_AS_STRING_FLAGS_AF_INET)) {
        if (!NM_FLAGS_HAS(to_string_flags, NM_IP_ROUTING_RULE_AS_STRING_FLAGS_AF_INET6))
            return AF_INET;
    } else if (NM_FLAGS_HAS(to_string_flags, NM_IP_ROUTING_RULE_AS_STRING_FLAGS_AF_INET6))
        return AF_INET6;
    return AF_UNSPEC;
}

/**
 * nm_ip_routing_rule_from_string:
 * @str: the string representation to convert to an #NMIPRoutingRule
 * @to_string_flags: #NMIPRoutingRuleAsStringFlags for controlling the
 *   string conversion.
 * @extra_args: (allow-none): extra arguments for controlling the string
 *   conversion. Currently, not extra arguments are supported.
 * @error: (allow-none) (out): the error reason.
 *
 * Returns: (transfer full): the new #NMIPRoutingRule or %NULL on error.
 *
 * Since: 1.18
 */
NMIPRoutingRule *
nm_ip_routing_rule_from_string(const char *                 str,
                               NMIPRoutingRuleAsStringFlags to_string_flags,
                               GHashTable *                 extra_args,
                               GError **                    error)
{
    nm_auto_unref_ip_routing_rule NMIPRoutingRule *self   = NULL;
    gs_free const char **                          tokens = NULL;
    gsize                                          i_token;
    gboolean                                       any_words                 = FALSE;
    char *                                         word0                     = NULL;
    char *                                         word1                     = NULL;
    char *                                         word_from                 = NULL;
    char *                                         word_to                   = NULL;
    char *                                         word_iifname              = NULL;
    char *                                         word_oifname              = NULL;
    gint64                                         i64_priority              = -1;
    gint64                                         i64_table                 = -1;
    gint64                                         i64_tos                   = -1;
    gint64                                         i64_fwmark                = -1;
    gint64                                         i64_fwmask                = -1;
    gint64                                         i64_sport_start           = -1;
    gint64                                         i64_ipproto               = -1;
    gint64                                         i64_suppress_prefixlength = -1;
    guint16                                        sport_end                 = 0;
    gint64                                         i64_dport_start           = -1;
    int                                            i_action                  = -1;
    guint16                                        dport_end                 = 0;
    guint32                                        uid_range_start           = 0;
    guint32                                        uid_range_end             = 0;
    gboolean                                       uid_range_has             = FALSE;
    gboolean                                       val_invert                = FALSE;
    int                                            addr_family               = AF_UNSPEC;
    NMIPAddr                                       val_from                  = {};
    NMIPAddr                                       val_to                    = {};
    int                                            val_from_len              = -1;
    int                                            val_to_len                = -1;
    char *                                         s;

    g_return_val_if_fail(str, NULL);

    if (!_rr_string_validate(TRUE, to_string_flags, extra_args, error))
        return NULL;

    /* nm_ip_routing_rule_from_string() / nm_ip_routing_rule_to_string() has a string representation
     * for rules that is partly compatibly with iproute2. That is, the part after
     * `ip -[46] rule add $ARGS`.
     *
     * There are differences though:
     *
     * - trying to convert an invalid rule to string may not be possible. The reason is for
     *   example that an invalid rule can have nm_ip_routing_rule_get_from() like "bogus",
     *   but we don't write that as "from bogus". In general, if you try to convert an invalid
     *   rule to string, the operation may fail or the result may itself not be parsable.
     *   Of course, valid rules can be converted to string and read back the same (round-trip).
     *
     * - iproute2 in many regards is flexible about the command lines. For example
     *   - for tables it accepts table names from /etc/iproute2/rt_tables. We only
     *     accept numeric values and the special aliases "main", "local", and "default".
     *   - key names like "preference" can be abbreviated to "pref", we don't do that.
     *   - the "preference"/"priority" may be unspecified, in which kernel automatically
     *     chooses an unused priority (during `ip rule add`). We don't allow for that, the
     *     priority must be explicitly set.
     *
     * - iproute2 does not support any escaping. Well, it's the shell that supports quoting
     *   and escaping and splits the command line. We need to split the command line ourself,
     *   but we don't support full shell quotation.
     *   from-string tokenizes words at (ASCII) whitespaces (removing the whitespaces).
     *   It also supports backslash escaping (e.g. to contain whitespace), but it does
     *   not support special escape sequences. Values are taken literally, meaning
     *   "\n\ \111" gives results in "n 111".
     *   The strings really shouldn't contain any special characters that require escaping.
     *   This also goes together with nm_utils_escaped_tokens_split().
     *   If you concatenate multiple rule expressions with a delimiter, the delimiter inside
     *   each word can be backslash escaped, and nm_utils_escaped_tokens_split() will
     *   properly split the words, preserving the backslashes, which then will be removed by
     *   nm_ip_routing_rule_from_string().
     */

    addr_family = _rr_string_addr_family_from_flags(to_string_flags);

    tokens = nm_utils_escaped_tokens_split(str, NM_ASCII_SPACES);
    for (i_token = 0; tokens && tokens[i_token]; i_token++) {
        char *str_word = (char *) tokens[i_token];

        any_words = TRUE;
        if (!word0)
            word0 = str_word;
        else {
            nm_assert(!word1);
            word1 = str_word;
        }

        /* iproute2 matches keywords with any partial prefix. We don't allow
         * for that flexibility. */

        if (NM_IN_STRSET(word0, "from")) {
            if (!word1)
                continue;
            if (word_from)
                goto next_fail_word0_duplicate_key;
            word_from = word1;
            goto next_words_consumed;
        }
        if (NM_IN_STRSET(word0, "to")) {
            if (!word1)
                continue;
            if (word_to)
                goto next_fail_word0_duplicate_key;
            word_to = word1;
            goto next_words_consumed;
        }
        if (NM_IN_STRSET(word0, "not")) {
            /* we accept multiple "not" specifiers. "not not" still means
             * not. */
            val_invert = TRUE;
            goto next_words_consumed;
        }
        if (NM_IN_STRSET(word0, "priority", "order", "pref", "preference")) {
            if (!word1)
                continue;
            if (i64_priority != -1)
                goto next_fail_word0_duplicate_key;
            i64_priority = _nm_utils_ascii_str_to_int64(word1, 0, 0, G_MAXUINT32, -1);
            if (i64_priority == -1)
                goto next_fail_word1_invalid_value;
            goto next_words_consumed;
        }
        if (NM_IN_STRSET(word0, "table", "lookup")) {
            if (!word1)
                continue;
            if (i64_table != -1)
                goto next_fail_word0_duplicate_key;
            i64_table = _nm_utils_ascii_str_to_int64(word1, 0, 0, G_MAXUINT32, -1);
            if (i64_table == -1) {
                if (nm_streq(word1, "main"))
                    i64_table = RT_TABLE_MAIN;
                else if (nm_streq(word1, "local"))
                    i64_table = RT_TABLE_LOCAL;
                else if (nm_streq(word1, "default"))
                    i64_table = RT_TABLE_DEFAULT;
                else
                    goto next_fail_word1_invalid_value;
            }
            goto next_words_consumed;
        }
        if (NM_IN_STRSET(word0, "tos", "dsfield")) {
            if (!word1)
                continue;
            if (i64_tos != -1)
                goto next_fail_word0_duplicate_key;
            i64_tos = _nm_utils_ascii_str_to_int64(word1, 16, 0, G_MAXUINT8, -1);
            if (i64_tos == -1)
                goto next_fail_word1_invalid_value;
            goto next_words_consumed;
        }
        if (NM_IN_STRSET(word0, "ipproto")) {
            if (!word1)
                continue;
            if (i64_ipproto != -1)
                goto next_fail_word0_duplicate_key;
            i64_ipproto = _nm_utils_ascii_str_to_int64(word1, 10, 0, G_MAXUINT8, -1);
            if (i64_ipproto == -1)
                goto next_fail_word1_invalid_value;
            goto next_words_consumed;
        }
        if (NM_IN_STRSET(word0, "sport")) {
            if (!word1)
                continue;
            if (i64_sport_start != -1)
                goto next_fail_word0_duplicate_key;
            if (!_rr_xport_range_parse(word1, &i64_sport_start, &sport_end))
                goto next_fail_word1_invalid_value;
            goto next_words_consumed;
        }
        if (NM_IN_STRSET(word0, "dport")) {
            if (!word1)
                continue;
            if (i64_dport_start != -1)
                goto next_fail_word0_duplicate_key;
            if (!_rr_xport_range_parse(word1, &i64_dport_start, &dport_end))
                goto next_fail_word1_invalid_value;
            goto next_words_consumed;
        }
        if (NM_IN_STRSET(word0, "fwmark")) {
            if (!word1)
                continue;
            if (i64_fwmark != -1)
                goto next_fail_word0_duplicate_key;
            s = strchr(word1, '/');
            if (s)
                *(s++) = '\0';
            i64_fwmark = _nm_utils_ascii_str_to_int64(word1, 0, 0, G_MAXUINT32, -1);
            if (i64_fwmark == -1)
                goto next_fail_word1_invalid_value;
            if (s) {
                i64_fwmask = _nm_utils_ascii_str_to_int64(s, 0, 0, G_MAXUINT32, -1);
                if (i64_fwmask == -1)
                    goto next_fail_word1_invalid_value;
            } else
                i64_fwmask = 0xFFFFFFFFu;
            goto next_words_consumed;
        }
        if (NM_IN_STRSET(word0, "iif", "dev")) {
            if (!word1)
                continue;
            if (word_iifname)
                goto next_fail_word0_duplicate_key;
            word_iifname = word1;
            goto next_words_consumed;
        }
        if (NM_IN_STRSET(word0, "oif")) {
            if (!word1)
                continue;
            if (word_oifname)
                goto next_fail_word0_duplicate_key;
            word_oifname = word1;
            goto next_words_consumed;
        }
        if (NM_IN_STRSET(word0, "suppress_prefixlength", "sup_pl")) {
            if (!word1)
                continue;
            if (i64_suppress_prefixlength != -1)
                goto next_fail_word0_duplicate_key;
            i64_suppress_prefixlength = _nm_utils_ascii_str_to_int64(word1, 0, 0, G_MAXINT32, -1);
            if (i64_suppress_prefixlength == -1)
                goto next_fail_word1_invalid_value;
            goto next_words_consumed;
        }
        if (NM_IN_STRSET(word0, "uidrange")) {
            if (!word1)
                continue;
            if (uid_range_has)
                goto next_fail_word0_duplicate_key;
            s = strchr(word1, '-');
            if (s)
                (s++)[0] = '\0';
            uid_range_start = _nm_utils_ascii_str_to_int64(word1, 0, 0, G_MAXUINT32, 0);
            if (errno)
                goto next_fail_word1_invalid_value;
            if (s) {
                uid_range_end = _nm_utils_ascii_str_to_int64(s, 0, 0, G_MAXUINT32, 0);
                if (errno)
                    goto next_fail_word1_invalid_value;
                if (uid_range_end < uid_range_start)
                    goto next_fail_word1_invalid_value;
            } else
                uid_range_end = uid_range_start;
            uid_range_has = TRUE;
            goto next_words_consumed;
        }
        if (NM_IN_STRSET(word0, "type")) {
            if (!word1)
                continue;
            if (i_action >= 0)
                goto next_fail_word0_duplicate_key;
            i_action = nm_net_aux_rtnl_rtntype_a2n(word1);
            if (i_action < 0)
                goto next_fail_word1_invalid_value;
            goto next_words_consumed;
        }

        if (i_action < 0) {
            i_action = nm_net_aux_rtnl_rtntype_a2n(word0);
            if (i_action >= 0)
                goto next_words_consumed;
        }

        g_set_error(error,
                    NM_CONNECTION_ERROR,
                    NM_CONNECTION_ERROR_FAILED,
                    _("unsupported key \"%s\""),
                    word0);
        return FALSE;
next_fail_word0_duplicate_key:
        g_set_error(error,
                    NM_CONNECTION_ERROR,
                    NM_CONNECTION_ERROR_FAILED,
                    _("duplicate key \"%s\""),
                    word0);
        return FALSE;
next_fail_word1_invalid_value:
        g_set_error(error,
                    NM_CONNECTION_ERROR,
                    NM_CONNECTION_ERROR_FAILED,
                    _("invalid value for \"%s\""),
                    word0);
        return FALSE;
next_words_consumed:
        word0 = NULL;
        word1 = NULL;
    }

    if (!any_words) {
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_FAILED,
                            _("empty text does not describe a rule"));
        return FALSE;
    }

    if (word0) {
        g_set_error(error,
                    NM_CONNECTION_ERROR,
                    NM_CONNECTION_ERROR_FAILED,
                    _("missing argument for \"%s\""),
                    word0);
        return FALSE;
    }

    if (!NM_IN_STRSET(word_from, NULL, "all")) {
        if (!nm_utils_parse_inaddr_prefix_bin(addr_family,
                                              word_from,
                                              &addr_family,
                                              &val_from,
                                              &val_from_len)) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_FAILED,
                                _("invalid \"from\" part"));
            return FALSE;
        }
        if (val_from_len == -1)
            val_from_len = nm_utils_addr_family_to_size(addr_family) * 8;
    }

    if (!NM_IN_STRSET(word_to, NULL, "all")) {
        if (!nm_utils_parse_inaddr_prefix_bin(addr_family,
                                              word_to,
                                              &addr_family,
                                              &val_to,
                                              &val_to_len)) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_FAILED,
                                _("invalid \"to\" part"));
            return FALSE;
        }
        if (val_to_len == -1)
            val_to_len = nm_utils_addr_family_to_size(addr_family) * 8;
    }

    if (!NM_IN_SET(addr_family, AF_INET, AF_INET6)) {
        g_set_error(error,
                    NM_CONNECTION_ERROR,
                    NM_CONNECTION_ERROR_FAILED,
                    _("cannot detect address family for rule"));
        return FALSE;
    }

    self = nm_ip_routing_rule_new(addr_family);

    if (val_invert)
        self->invert = TRUE;

    if (i64_priority != -1)
        nm_ip_routing_rule_set_priority(self, i64_priority);

    if (i_action >= 0) {
        nm_ip_routing_rule_set_action(self, i_action);
        if (i64_table == -1) {
            if (i_action != FR_ACT_TO_TBL)
                i64_table = 0;
            else
                i64_table = RT_TABLE_MAIN;
        }
    }

    if (i64_tos != -1)
        nm_ip_routing_rule_set_tos(self, i64_tos);

    if (i64_ipproto != -1)
        nm_ip_routing_rule_set_ipproto(self, i64_ipproto);

    if (i64_fwmark != -1)
        nm_ip_routing_rule_set_fwmark(self, i64_fwmark, i64_fwmask);

    if (i64_sport_start != -1)
        nm_ip_routing_rule_set_source_port(self, i64_sport_start, sport_end);

    if (i64_dport_start != -1)
        nm_ip_routing_rule_set_destination_port(self, i64_dport_start, dport_end);

    if (i64_suppress_prefixlength != -1)
        nm_ip_routing_rule_set_suppress_prefixlength(self, i64_suppress_prefixlength);

    if (val_from_len > 0 || (val_from_len == 0 && !nm_ip_addr_is_null(addr_family, &val_from))) {
        nm_ip_routing_rule_set_from_bin(self, &val_from, val_from_len);
    }

    if (val_to_len > 0 || (val_to_len == 0 && !nm_ip_addr_is_null(addr_family, &val_to))) {
        nm_ip_routing_rule_set_to_bin(self, &val_to, val_to_len);
    }

    if (word_iifname)
        nm_ip_routing_rule_set_iifname(self, word_iifname);

    if (word_oifname)
        nm_ip_routing_rule_set_oifname(self, word_oifname);

    if (i64_table != -1)
        nm_ip_routing_rule_set_table(self, i64_table);

    if (uid_range_has)
        nm_ip_routing_rule_set_uid_range(self, uid_range_start, uid_range_end);

    if (NM_FLAGS_HAS(to_string_flags, NM_IP_ROUTING_RULE_AS_STRING_FLAGS_VALIDATE)) {
        gs_free_error GError *local = NULL;

        if (!nm_ip_routing_rule_validate(self, &local)) {
            g_set_error(error,
                        NM_CONNECTION_ERROR,
                        NM_CONNECTION_ERROR_FAILED,
                        _("rule is invalid: %s"),
                        local->message);
            return NULL;
        }
    }

    return g_steal_pointer(&self);
}

static void
_rr_string_append_inet_addr(NMStrBuf *      str,
                            gboolean        is_from /* or else is-to */,
                            gboolean        required,
                            int             addr_family,
                            const NMIPAddr *addr_bin,
                            guint8          addr_len)
{
    char addr_str[NM_UTILS_INET_ADDRSTRLEN];

    if (addr_len == 0) {
        if (required) {
            nm_str_buf_append_printf(nm_str_buf_append_required_delimiter(str, ' '),
                                     "%s %s/0",
                                     is_from ? "from" : "to",
                                     (addr_family == AF_INET) ? "0.0.0.0" : "::");
        }
        return;
    }

    nm_str_buf_append_printf(nm_str_buf_append_required_delimiter(str, ' '),
                             "%s %s",
                             is_from ? "from" : "to",
                             nm_utils_inet_ntop(addr_family, addr_bin, addr_str));
    if (addr_len != nm_utils_addr_family_to_size(addr_family) * 8) {
        nm_str_buf_append_printf(str, "/%u", addr_len);
    }
}

/**
 * nm_ip_routing_rule_to_string:
 * @self: the #NMIPRoutingRule instance to convert to string.
 * @to_string_flags: #NMIPRoutingRuleAsStringFlags for controlling the
 *   string conversion.
 * @extra_args: (allow-none): extra arguments for controlling the string
 *   conversion. Currently, not extra arguments are supported.
 * @error: (allow-none) (out): the error reason.
 *
 * Returns: (transfer full): the string representation or %NULL on error.
 *
 * Since: 1.18
 */
char *
nm_ip_routing_rule_to_string(const NMIPRoutingRule *      self,
                             NMIPRoutingRuleAsStringFlags to_string_flags,
                             GHashTable *                 extra_args,
                             GError **                    error)
{
    int      addr_family;
    NMStrBuf str;

    g_return_val_if_fail(NM_IS_IP_ROUTING_RULE(self, TRUE), NULL);

    if (!_rr_string_validate(FALSE, to_string_flags, extra_args, error))
        return NULL;

    addr_family = nm_ip_routing_rule_get_addr_family(self);

    if (!NM_IN_SET(_rr_string_addr_family_from_flags(to_string_flags), AF_UNSPEC, addr_family)) {
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_FAILED,
                            _("invalid address family"));
        return NULL;
    }

    /* It is only guaranteed that valid rules can be expressed as string.
     *
     * Still, unless requested proceed to convert to string without validating and
     * hope for the best.
     *
     * That is, because self->from_str might contain an invalid IP address (indicated
     * by self->from_valid). But we don't support serializing such arbitrary strings
     * as "from %s". */
    if (NM_FLAGS_HAS(to_string_flags, NM_IP_ROUTING_RULE_AS_STRING_FLAGS_VALIDATE)) {
        gs_free_error GError *local = NULL;

        if (!nm_ip_routing_rule_validate(self, &local)) {
            g_set_error(error,
                        NM_CONNECTION_ERROR,
                        NM_CONNECTION_ERROR_FAILED,
                        _("rule is invalid: %s"),
                        local->message);
            return NULL;
        }
    }

    nm_str_buf_init(&str, NM_UTILS_GET_NEXT_REALLOC_SIZE_32, FALSE);

    if (self->priority_has) {
        nm_str_buf_append_printf(nm_str_buf_append_required_delimiter(&str, ' '),
                                 "priority %u",
                                 (guint) self->priority);
    }

    if (self->invert)
        nm_str_buf_append(nm_str_buf_append_required_delimiter(&str, ' '), "not");

    _rr_string_append_inet_addr(&str,
                                TRUE,
                                (!self->to_has || !self->to_valid),
                                addr_family,
                                &self->from_bin,
                                (self->from_has && self->from_valid) ? self->from_len : 0);

    _rr_string_append_inet_addr(&str,
                                FALSE,
                                FALSE,
                                addr_family,
                                &self->to_bin,
                                (self->to_has && self->to_valid) ? self->to_len : 0);

    if (self->tos != 0) {
        nm_str_buf_append_printf(nm_str_buf_append_required_delimiter(&str, ' '),
                                 "tos 0x%02x",
                                 (guint) self->tos);
    }

    if (self->ipproto != 0) {
        nm_str_buf_append_printf(nm_str_buf_append_required_delimiter(&str, ' '),
                                 "ipproto %u",
                                 (guint) self->ipproto);
    }

    if (self->fwmark != 0 || self->fwmask != 0) {
        if (self->fwmark != 0) {
            nm_str_buf_append_printf(nm_str_buf_append_required_delimiter(&str, ' '),
                                     "fwmark 0x%x",
                                     self->fwmark);
        } else {
            nm_str_buf_append_printf(nm_str_buf_append_required_delimiter(&str, ' '), "fwmark 0");
        }
        if (self->fwmask != 0xFFFFFFFFu) {
            if (self->fwmask != 0)
                nm_str_buf_append_printf(&str, "/0x%x", self->fwmask);
            else
                nm_str_buf_append_printf(&str, "/0");
        }
    }

    if (self->sport_start != 0 || self->sport_end != 0) {
        nm_str_buf_append_printf(nm_str_buf_append_required_delimiter(&str, ' '),
                                 "sport %u",
                                 self->sport_start);
        if (self->sport_start != self->sport_end) {
            nm_str_buf_append_printf(&str, "-%u", self->sport_end);
        }
    }

    if (self->dport_start != 0 || self->dport_end != 0) {
        nm_str_buf_append_printf(nm_str_buf_append_required_delimiter(&str, ' '),
                                 "dport %u",
                                 self->dport_start);
        if (self->dport_start != self->dport_end) {
            nm_str_buf_append_printf(&str, "-%u", self->dport_end);
        }
    }

    if (self->iifname) {
        nm_str_buf_append(nm_str_buf_append_required_delimiter(&str, ' '), "iif ");
        nm_utils_escaped_tokens_escape_strbuf(self->iifname, NM_ASCII_SPACES, &str);
    }

    if (self->oifname) {
        nm_str_buf_append(nm_str_buf_append_required_delimiter(&str, ' '), "oif ");
        nm_utils_escaped_tokens_escape_strbuf(self->oifname, NM_ASCII_SPACES, &str);
    }

    if (self->uid_range_has) {
        nm_str_buf_append_printf(nm_str_buf_append_required_delimiter(&str, ' '),
                                 "uidrange %u-%u",
                                 self->uid_range_start,
                                 self->uid_range_end);
    }

    if (self->suppress_prefixlength != -1) {
        nm_str_buf_append_printf(nm_str_buf_append_required_delimiter(&str, ' '),
                                 "suppress_prefixlength %d",
                                 (int) self->suppress_prefixlength);
    }

    if (self->table != 0 || self->action == FR_ACT_TO_TBL) {
        nm_str_buf_append_printf(nm_str_buf_append_required_delimiter(&str, ' '),
                                 "table %u",
                                 (guint) self->table);
    }

    if (self->action != FR_ACT_TO_TBL) {
        char sbuf[100];

        nm_str_buf_append_printf(nm_str_buf_append_required_delimiter(&str, ' '),
                                 "type %s",
                                 nm_net_aux_rtnl_rtntype_n2a_maybe_buf(self->action, sbuf));
    }

    return nm_str_buf_finalize(&str, NULL);
}

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

NM_GOBJECT_PROPERTIES_DEFINE(NMSettingIPConfig,
                             PROP_METHOD,
                             PROP_DNS,
                             PROP_DNS_SEARCH,
                             PROP_DNS_OPTIONS,
                             PROP_DNS_PRIORITY,
                             PROP_ADDRESSES,
                             PROP_GATEWAY,
                             PROP_ROUTES,
                             PROP_ROUTE_METRIC,
                             PROP_ROUTE_TABLE,
                             PROP_IGNORE_AUTO_ROUTES,
                             PROP_IGNORE_AUTO_DNS,
                             PROP_DHCP_HOSTNAME,
                             PROP_DHCP_HOSTNAME_FLAGS,
                             PROP_DHCP_SEND_HOSTNAME,
                             PROP_NEVER_DEFAULT,
                             PROP_MAY_FAIL,
                             PROP_DAD_TIMEOUT,
                             PROP_DHCP_TIMEOUT,
                             PROP_REQUIRED_TIMEOUT,
                             PROP_DHCP_IAID,
                             PROP_DHCP_REJECT_SERVERS, );

typedef struct {
    GPtrArray *dns;         /* array of IP address strings */
    GPtrArray *dns_search;  /* array of domain name strings */
    GPtrArray *dns_options; /* array of DNS options */
    GPtrArray *addresses;   /* array of NMIPAddress */
    GPtrArray *routes;      /* array of NMIPRoute */
    GPtrArray *routing_rules;
    GArray *   dhcp_reject_servers;
    char *     method;
    char *     gateway;
    char *     dhcp_hostname;
    char *     dhcp_iaid;
    gint64     route_metric;
    guint      dhcp_hostname_flags;
    int        dns_priority;
    int        dad_timeout;
    int        dhcp_timeout;
    int        required_timeout;
    guint32    route_table;
    bool       ignore_auto_routes : 1;
    bool       ignore_auto_dns : 1;
    bool       dhcp_send_hostname : 1;
    bool       never_default : 1;
    bool       may_fail : 1;
} NMSettingIPConfigPrivate;

G_DEFINE_ABSTRACT_TYPE(NMSettingIPConfig, nm_setting_ip_config, NM_TYPE_SETTING)

#define NM_SETTING_IP_CONFIG_GET_PRIVATE(o) \
    (G_TYPE_INSTANCE_GET_PRIVATE((o), NM_TYPE_SETTING_IP_CONFIG, NMSettingIPConfigPrivate))

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

#define NM_SETTING_IP_CONFIG_GET_FAMILY(setting) \
    (NM_IS_SETTING_IP4_CONFIG(setting) ? AF_INET : AF_INET6)

/**
 * nm_setting_ip_config_get_method:
 * @setting: the #NMSettingIPConfig
 *
 * Returns: the #NMSettingIPConfig:method property of the setting; see
 * #NMSettingIP4Config and #NMSettingIP6Config for details of the
 * methods available with each type.
 **/
const char *
nm_setting_ip_config_get_method(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), NULL);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->method;
}

/**
 * nm_setting_ip_config_get_num_dns:
 * @setting: the #NMSettingIPConfig
 *
 * Returns: the number of configured DNS servers
 **/
guint
nm_setting_ip_config_get_num_dns(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), 0);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->dns->len;
}

/**
 * nm_setting_ip_config_get_dns:
 * @setting: the #NMSettingIPConfig
 * @idx: index number of the DNS server to return
 *
 * Returns: the IP address of the DNS server at index @idx
 **/
const char *
nm_setting_ip_config_get_dns(NMSettingIPConfig *setting, int idx)
{
    NMSettingIPConfigPrivate *priv;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), NULL);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    g_return_val_if_fail(idx >= 0 && idx < priv->dns->len, NULL);

    return priv->dns->pdata[idx];
}

/**
 * nm_setting_ip_config_add_dns:
 * @setting: the #NMSettingIPConfig
 * @dns: the IP address of the DNS server to add
 *
 * Adds a new DNS server to the setting.
 *
 * Returns: %TRUE if the DNS server was added; %FALSE if the server was already
 * known
 **/
gboolean
nm_setting_ip_config_add_dns(NMSettingIPConfig *setting, const char *dns)
{
    NMSettingIPConfigPrivate *priv;
    char *                    dns_canonical;
    guint                     i;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), FALSE);
    g_return_val_if_fail(dns != NULL, FALSE);
    g_return_val_if_fail(nm_utils_ipaddr_is_valid(NM_SETTING_IP_CONFIG_GET_FAMILY(setting), dns),
                         FALSE);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);

    dns_canonical = canonicalize_ip(NM_SETTING_IP_CONFIG_GET_FAMILY(setting), dns, FALSE);
    for (i = 0; i < priv->dns->len; i++) {
        if (!strcmp(dns_canonical, priv->dns->pdata[i])) {
            g_free(dns_canonical);
            return FALSE;
        }
    }

    g_ptr_array_add(priv->dns, dns_canonical);
    _notify(setting, PROP_DNS);
    return TRUE;
}

/**
 * nm_setting_ip_config_remove_dns:
 * @setting: the #NMSettingIPConfig
 * @idx: index number of the DNS server to remove
 *
 * Removes the DNS server at index @idx.
 **/
void
nm_setting_ip_config_remove_dns(NMSettingIPConfig *setting, int idx)
{
    NMSettingIPConfigPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    g_return_if_fail(idx >= 0 && idx < priv->dns->len);

    g_ptr_array_remove_index(priv->dns, idx);
    _notify(setting, PROP_DNS);
}

/**
 * nm_setting_ip_config_remove_dns_by_value:
 * @setting: the #NMSettingIPConfig
 * @dns: the DNS server to remove
 *
 * Removes the DNS server @dns.
 *
 * Returns: %TRUE if the DNS server was found and removed; %FALSE if it was not.
 **/
gboolean
nm_setting_ip_config_remove_dns_by_value(NMSettingIPConfig *setting, const char *dns)
{
    NMSettingIPConfigPrivate *priv;
    char *                    dns_canonical;
    guint                     i;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), FALSE);
    g_return_val_if_fail(dns != NULL, FALSE);
    g_return_val_if_fail(nm_utils_ipaddr_is_valid(NM_SETTING_IP_CONFIG_GET_FAMILY(setting), dns),
                         FALSE);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);

    dns_canonical = canonicalize_ip(NM_SETTING_IP_CONFIG_GET_FAMILY(setting), dns, FALSE);
    for (i = 0; i < priv->dns->len; i++) {
        if (!strcmp(dns_canonical, priv->dns->pdata[i])) {
            g_ptr_array_remove_index(priv->dns, i);
            _notify(setting, PROP_DNS);
            g_free(dns_canonical);
            return TRUE;
        }
    }
    g_free(dns_canonical);
    return FALSE;
}

/**
 * nm_setting_ip_config_clear_dns:
 * @setting: the #NMSettingIPConfig
 *
 * Removes all configured DNS servers.
 **/
void
nm_setting_ip_config_clear_dns(NMSettingIPConfig *setting)
{
    NMSettingIPConfigPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);

    if (priv->dns->len != 0) {
        g_ptr_array_set_size(priv->dns, 0);
        _notify(setting, PROP_DNS);
    }
}

/**
 * nm_setting_ip_config_get_num_dns_searches:
 * @setting: the #NMSettingIPConfig
 *
 * Returns: the number of configured DNS search domains
 **/
guint
nm_setting_ip_config_get_num_dns_searches(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), 0);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->dns_search->len;
}

/**
 * nm_setting_ip_config_get_dns_search:
 * @setting: the #NMSettingIPConfig
 * @idx: index number of the DNS search domain to return
 *
 * Returns: the DNS search domain at index @idx
 **/
const char *
nm_setting_ip_config_get_dns_search(NMSettingIPConfig *setting, int idx)
{
    NMSettingIPConfigPrivate *priv;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), NULL);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    g_return_val_if_fail(idx >= 0 && idx < priv->dns_search->len, NULL);

    return priv->dns_search->pdata[idx];
}

/**
 * nm_setting_ip_config_add_dns_search:
 * @setting: the #NMSettingIPConfig
 * @dns_search: the search domain to add
 *
 * Adds a new DNS search domain to the setting.
 *
 * Returns: %TRUE if the DNS search domain was added; %FALSE if the search
 * domain was already known
 **/
gboolean
nm_setting_ip_config_add_dns_search(NMSettingIPConfig *setting, const char *dns_search)
{
    NMSettingIPConfigPrivate *priv;
    guint                     i;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), FALSE);
    g_return_val_if_fail(dns_search != NULL, FALSE);
    g_return_val_if_fail(dns_search[0] != '\0', FALSE);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    for (i = 0; i < priv->dns_search->len; i++) {
        if (!strcmp(dns_search, priv->dns_search->pdata[i]))
            return FALSE;
    }

    g_ptr_array_add(priv->dns_search, g_strdup(dns_search));
    _notify(setting, PROP_DNS_SEARCH);
    return TRUE;
}

/**
 * nm_setting_ip_config_remove_dns_search:
 * @setting: the #NMSettingIPConfig
 * @idx: index number of the DNS search domain
 *
 * Removes the DNS search domain at index @idx.
 **/
void
nm_setting_ip_config_remove_dns_search(NMSettingIPConfig *setting, int idx)
{
    NMSettingIPConfigPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    g_return_if_fail(idx >= 0 && idx < priv->dns_search->len);

    g_ptr_array_remove_index(priv->dns_search, idx);
    _notify(setting, PROP_DNS_SEARCH);
}

/**
 * nm_setting_ip_config_remove_dns_search_by_value:
 * @setting: the #NMSettingIPConfig
 * @dns_search: the search domain to remove
 *
 * Removes the DNS search domain @dns_search.
 *
 * Returns: %TRUE if the DNS search domain was found and removed; %FALSE if it was not.
 **/
gboolean
nm_setting_ip_config_remove_dns_search_by_value(NMSettingIPConfig *setting, const char *dns_search)
{
    NMSettingIPConfigPrivate *priv;
    guint                     i;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), FALSE);
    g_return_val_if_fail(dns_search != NULL, FALSE);
    g_return_val_if_fail(dns_search[0] != '\0', FALSE);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    for (i = 0; i < priv->dns_search->len; i++) {
        if (!strcmp(dns_search, priv->dns_search->pdata[i])) {
            g_ptr_array_remove_index(priv->dns_search, i);
            _notify(setting, PROP_DNS_SEARCH);
            return TRUE;
        }
    }
    return FALSE;
}

/**
 * nm_setting_ip_config_clear_dns_searches:
 * @setting: the #NMSettingIPConfig
 *
 * Removes all configured DNS search domains.
 **/
void
nm_setting_ip_config_clear_dns_searches(NMSettingIPConfig *setting)
{
    NMSettingIPConfigPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);

    if (priv->dns_search->len != 0) {
        g_ptr_array_set_size(priv->dns_search, 0);
        _notify(setting, PROP_DNS_SEARCH);
    }
}

/**
 * nm_setting_ip_config_get_num_dns_options:
 * @setting: the #NMSettingIPConfig
 *
 * Returns: the number of configured DNS options
 *
 * Since: 1.2
 **/
guint
nm_setting_ip_config_get_num_dns_options(NMSettingIPConfig *setting)
{
    NMSettingIPConfigPrivate *priv;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), 0);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);

    return priv->dns_options ? priv->dns_options->len : 0;
}

/**
 * nm_setting_ip_config_has_dns_options:
 * @setting: the #NMSettingIPConfig
 *
 * NMSettingIPConfig can have a list of dns-options. If the list
 * is empty, there are two similar (but differentiated) states.
 * Either the options are explicitly set to have no values,
 * or the options are left undefined. The latter means to use
 * a default configuration, while the former explicitly means "no-options".
 *
 * Returns: whether DNS options are initialized or left unset (the default).
 **/
gboolean
nm_setting_ip_config_has_dns_options(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), 0);

    return !!NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->dns_options;
}

/**
 * nm_setting_ip_config_get_dns_option:
 * @setting: the #NMSettingIPConfig
 * @idx: index number of the DNS option
 *
 * Returns: the DNS option at index @idx
 *
 * Since: 1.2
 **/
const char *
nm_setting_ip_config_get_dns_option(NMSettingIPConfig *setting, guint idx)
{
    NMSettingIPConfigPrivate *priv;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), NULL);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    g_return_val_if_fail(priv->dns_options, NULL);
    g_return_val_if_fail(idx < priv->dns_options->len, NULL);

    return priv->dns_options->pdata[idx];
}

/**
 * nm_setting_ip_config_next_valid_dns_option:
 * @setting: the #NMSettingIPConfig
 * @idx: index to start the search from
 *
 * Returns: the index, greater or equal than @idx, of the first valid
 * DNS option, or -1 if no valid option is found
 **/
int
nm_setting_ip_config_next_valid_dns_option(NMSettingIPConfig *setting, guint idx)
{
    NMSettingIPConfigPrivate *priv;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), -1);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);

    if (!priv->dns_options)
        return -1;

    for (; idx < priv->dns_options->len; idx++) {
        if (_nm_utils_dns_option_validate(priv->dns_options->pdata[idx],
                                          NULL,
                                          NULL,
                                          NM_IS_SETTING_IP6_CONFIG(setting),
                                          _nm_utils_dns_option_descs))
            return idx;
    }

    return -1;
}

/**
 * nm_setting_ip_config_add_dns_option:
 * @setting: the #NMSettingIPConfig
 * @dns_option: the DNS option to add
 *
 * Adds a new DNS option to the setting.
 *
 * Returns: %TRUE if the DNS option was added; %FALSE otherwise
 *
 * Since: 1.2
 **/
gboolean
nm_setting_ip_config_add_dns_option(NMSettingIPConfig *setting, const char *dns_option)
{
    NMSettingIPConfigPrivate *priv;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), FALSE);
    g_return_val_if_fail(dns_option != NULL, FALSE);
    g_return_val_if_fail(dns_option[0] != '\0', FALSE);

    if (!_nm_utils_dns_option_validate(dns_option, NULL, NULL, FALSE, NULL))
        return FALSE;

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    if (!priv->dns_options)
        priv->dns_options = g_ptr_array_new_with_free_func(g_free);
    else {
        if (_nm_utils_dns_option_find_idx(priv->dns_options, dns_option) >= 0)
            return FALSE;
    }

    g_ptr_array_add(priv->dns_options, g_strdup(dns_option));
    _notify(setting, PROP_DNS_OPTIONS);
    return TRUE;
}

/**
 * nm_setting_ip_config_remove_dns_option:
 * @setting: the #NMSettingIPConfig
 * @idx: index number of the DNS option
 *
 * Removes the DNS option at index @idx.
 *
 * Since: 1.2
 **/
void
nm_setting_ip_config_remove_dns_option(NMSettingIPConfig *setting, int idx)
{
    NMSettingIPConfigPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    g_return_if_fail(priv->dns_options);
    g_return_if_fail(idx >= 0 && idx < priv->dns_options->len);

    g_ptr_array_remove_index(priv->dns_options, idx);
    _notify(setting, PROP_DNS_OPTIONS);
}

/**
 * nm_setting_ip_config_remove_dns_option_by_value:
 * @setting: the #NMSettingIPConfig
 * @dns_option: the DNS option to remove
 *
 * Removes the DNS option @dns_option.
 *
 * Returns: %TRUE if the DNS option was found and removed; %FALSE if it was not.
 *
 * Since: 1.2
 **/
gboolean
nm_setting_ip_config_remove_dns_option_by_value(NMSettingIPConfig *setting, const char *dns_option)
{
    NMSettingIPConfigPrivate *priv;
    gssize                    i;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), FALSE);
    g_return_val_if_fail(dns_option != NULL, FALSE);
    g_return_val_if_fail(dns_option[0] != '\0', FALSE);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    if (!priv->dns_options)
        return FALSE;

    i = _nm_utils_dns_option_find_idx(priv->dns_options, dns_option);
    if (i >= 0) {
        g_ptr_array_remove_index(priv->dns_options, i);
        _notify(setting, PROP_DNS_OPTIONS);
        return TRUE;
    }

    return FALSE;
}

/**
 * nm_setting_ip_config_clear_dns_options:
 * @setting: the #NMSettingIPConfig
 * @is_set: the dns-options can be either empty or unset (default).
 *   Specify how to clear the options.
 *
 * Removes all configured DNS options.
 *
 * Since: 1.2
 **/
void
nm_setting_ip_config_clear_dns_options(NMSettingIPConfig *setting, gboolean is_set)
{
    NMSettingIPConfigPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    if (!priv->dns_options) {
        if (!is_set)
            return;
        priv->dns_options = g_ptr_array_new_with_free_func(g_free);
    } else {
        if (!is_set) {
            g_ptr_array_unref(priv->dns_options);
            priv->dns_options = NULL;
        } else {
            if (priv->dns_options->len == 0)
                return;
            g_ptr_array_set_size(priv->dns_options, 0);
        }
    }
    _notify(setting, PROP_DNS_OPTIONS);
}

/**
 * nm_setting_ip_config_get_dns_priority:
 * @setting: the #NMSettingIPConfig
 *
 * Returns: the priority of DNS servers
 *
 * Since: 1.4
 **/
int
nm_setting_ip_config_get_dns_priority(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), 0);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->dns_priority;
}

/**
 * nm_setting_ip_config_get_num_addresses:
 * @setting: the #NMSettingIPConfig
 *
 * Returns: the number of configured addresses
 **/
guint
nm_setting_ip_config_get_num_addresses(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), 0);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->addresses->len;
}

/**
 * nm_setting_ip_config_get_address:
 * @setting: the #NMSettingIPConfig
 * @idx: index number of the address to return
 *
 * Returns: (transfer none): the address at index @idx
 **/
NMIPAddress *
nm_setting_ip_config_get_address(NMSettingIPConfig *setting, int idx)
{
    NMSettingIPConfigPrivate *priv;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), NULL);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    g_return_val_if_fail(idx >= 0 && idx < priv->addresses->len, NULL);

    return priv->addresses->pdata[idx];
}

/**
 * nm_setting_ip_config_add_address:
 * @setting: the #NMSettingIPConfig
 * @address: the new address to add
 *
 * Adds a new IP address and associated information to the setting.  The
 * given address is duplicated internally and is not changed by this function.
 *
 * Returns: %TRUE if the address was added; %FALSE if the address was already
 * known.
 **/
gboolean
nm_setting_ip_config_add_address(NMSettingIPConfig *setting, NMIPAddress *address)
{
    NMSettingIPConfigPrivate *priv;
    guint                     i;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), FALSE);
    g_return_val_if_fail(address != NULL, FALSE);
    g_return_val_if_fail(address->family == NM_SETTING_IP_CONFIG_GET_FAMILY(setting), FALSE);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    for (i = 0; i < priv->addresses->len; i++) {
        if (nm_ip_address_equal(priv->addresses->pdata[i], address))
            return FALSE;
    }

    g_ptr_array_add(priv->addresses, nm_ip_address_dup(address));

    _notify(setting, PROP_ADDRESSES);
    return TRUE;
}

/**
 * nm_setting_ip_config_remove_address:
 * @setting: the #NMSettingIPConfig
 * @idx: index number of the address to remove
 *
 * Removes the address at index @idx.
 **/
void
nm_setting_ip_config_remove_address(NMSettingIPConfig *setting, int idx)
{
    NMSettingIPConfigPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    g_return_if_fail(idx >= 0 && idx < priv->addresses->len);

    g_ptr_array_remove_index(priv->addresses, idx);

    _notify(setting, PROP_ADDRESSES);
}

/**
 * nm_setting_ip_config_remove_address_by_value:
 * @setting: the #NMSettingIPConfig
 * @address: the IP address to remove
 *
 * Removes the address @address.
 *
 * Returns: %TRUE if the address was found and removed; %FALSE if it was not.
 **/
gboolean
nm_setting_ip_config_remove_address_by_value(NMSettingIPConfig *setting, NMIPAddress *address)
{
    NMSettingIPConfigPrivate *priv;
    guint                     i;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), FALSE);
    g_return_val_if_fail(address != NULL, FALSE);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    for (i = 0; i < priv->addresses->len; i++) {
        if (nm_ip_address_equal(priv->addresses->pdata[i], address)) {
            g_ptr_array_remove_index(priv->addresses, i);
            _notify(setting, PROP_ADDRESSES);
            return TRUE;
        }
    }
    return FALSE;
}

/**
 * nm_setting_ip_config_clear_addresses:
 * @setting: the #NMSettingIPConfig
 *
 * Removes all configured addresses.
 **/
void
nm_setting_ip_config_clear_addresses(NMSettingIPConfig *setting)
{
    NMSettingIPConfigPrivate *priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));

    if (priv->addresses->len != 0) {
        g_ptr_array_set_size(priv->addresses, 0);
        _notify(setting, PROP_ADDRESSES);
    }
}

/**
 * nm_setting_ip_config_get_gateway:
 * @setting: the #NMSettingIPConfig
 *
 * Returns: the IP address of the gateway associated with this configuration, or
 * %NULL.
 **/
const char *
nm_setting_ip_config_get_gateway(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), NULL);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->gateway;
}

/**
 * nm_setting_ip_config_get_num_routes:
 * @setting: the #NMSettingIPConfig
 *
 * Returns: the number of configured routes
 **/
guint
nm_setting_ip_config_get_num_routes(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), 0);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->routes->len;
}

/**
 * nm_setting_ip_config_get_route:
 * @setting: the #NMSettingIPConfig
 * @idx: index number of the route to return
 *
 * Returns: (transfer none): the route at index @idx
 **/
NMIPRoute *
nm_setting_ip_config_get_route(NMSettingIPConfig *setting, int idx)
{
    NMSettingIPConfigPrivate *priv;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), NULL);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    g_return_val_if_fail(idx >= 0 && idx < priv->routes->len, NULL);

    return priv->routes->pdata[idx];
}

/**
 * nm_setting_ip_config_add_route:
 * @setting: the #NMSettingIPConfig
 * @route: the route to add
 *
 * Appends a new route and associated information to the setting.  The
 * given route is duplicated internally and is not changed by this function.
 * If an identical route (considering attributes as well) already exists, the
 * route is not added and the function returns %FALSE.
 *
 * Note that before 1.10, this function would not consider route attributes
 * and not add a route that has an existing route with same dest/prefix,next_hop,metric
 * parameters.
 *
 * Returns: %TRUE if the route was added; %FALSE if the route was already known.
 **/
gboolean
nm_setting_ip_config_add_route(NMSettingIPConfig *setting, NMIPRoute *route)
{
    NMSettingIPConfigPrivate *priv;
    guint                     i;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), FALSE);
    g_return_val_if_fail(route != NULL, FALSE);
    g_return_val_if_fail(route->family == NM_SETTING_IP_CONFIG_GET_FAMILY(setting), FALSE);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    for (i = 0; i < priv->routes->len; i++) {
        if (nm_ip_route_equal_full(priv->routes->pdata[i],
                                   route,
                                   NM_IP_ROUTE_EQUAL_CMP_FLAGS_WITH_ATTRS))
            return FALSE;
    }

    g_ptr_array_add(priv->routes, nm_ip_route_dup(route));
    _notify(setting, PROP_ROUTES);
    return TRUE;
}

/**
 * nm_setting_ip_config_remove_route:
 * @setting: the #NMSettingIPConfig
 * @idx: index number of the route
 *
 * Removes the route at index @idx.
 **/
void
nm_setting_ip_config_remove_route(NMSettingIPConfig *setting, int idx)
{
    NMSettingIPConfigPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    g_return_if_fail(idx >= 0 && idx < priv->routes->len);

    g_ptr_array_remove_index(priv->routes, idx);
    _notify(setting, PROP_ROUTES);
}

/**
 * nm_setting_ip_config_remove_route_by_value:
 * @setting: the #NMSettingIPConfig
 * @route: the route to remove
 *
 * Removes the first matching route that matches @route.
 * Note that before 1.10, this function would only compare dest/prefix,next_hop,metric
 * and ignore route attributes. Now, @route must match exactly.
 *
 * Returns: %TRUE if the route was found and removed; %FALSE if it was not.
 **/
gboolean
nm_setting_ip_config_remove_route_by_value(NMSettingIPConfig *setting, NMIPRoute *route)
{
    NMSettingIPConfigPrivate *priv;
    guint                     i;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), FALSE);
    g_return_val_if_fail(route != NULL, FALSE);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    for (i = 0; i < priv->routes->len; i++) {
        if (nm_ip_route_equal_full(priv->routes->pdata[i],
                                   route,
                                   NM_IP_ROUTE_EQUAL_CMP_FLAGS_WITH_ATTRS)) {
            g_ptr_array_remove_index(priv->routes, i);
            _notify(setting, PROP_ROUTES);
            return TRUE;
        }
    }
    return FALSE;
}

/**
 * nm_setting_ip_config_clear_routes:
 * @setting: the #NMSettingIPConfig
 *
 * Removes all configured routes.
 **/
void
nm_setting_ip_config_clear_routes(NMSettingIPConfig *setting)
{
    NMSettingIPConfigPrivate *priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));

    if (priv->routes->len != 0) {
        g_ptr_array_set_size(priv->routes, 0);
        _notify(setting, PROP_ROUTES);
    }
}

/**
 * nm_setting_ip_config_get_route_metric:
 * @setting: the #NMSettingIPConfig
 *
 * Returns the value contained in the #NMSettingIPConfig:route-metric
 * property.
 *
 * Returns: the route metric that is used for routes that don't explicitly
 * specify a metric. See #NMSettingIPConfig:route-metric for more details.
 **/
gint64
nm_setting_ip_config_get_route_metric(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), -1);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->route_metric;
}

/**
 * nm_setting_ip_config_get_route_table:
 * @setting: the #NMSettingIPConfig
 *
 * Returns the value contained in the #NMSettingIPConfig:route-table
 * property.
 *
 * Returns: the configured route-table.
 *
 * Since: 1.10
 **/
guint32
nm_setting_ip_config_get_route_table(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), 0);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->route_table;
}

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

static void
_routing_rules_notify(NMSettingIPConfig *setting)
{
    _nm_setting_emit_property_changed(NM_SETTING(setting));
}

/**
 * nm_setting_ip_config_get_num_routing_rules:
 * @setting: the #NMSettingIPConfig
 *
 * Returns: the number of configured routing rules
 *
 * Since: 1.18
 **/
guint
nm_setting_ip_config_get_num_routing_rules(NMSettingIPConfig *setting)
{
    NMSettingIPConfigPrivate *priv;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), 0);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    return priv->routing_rules ? priv->routing_rules->len : 0u;
}

/**
 * nm_setting_ip_config_get_routing_rule:
 * @setting: the #NMSettingIPConfig
 * @idx: index number of the routing_rule to return
 *
 * Returns: (transfer none): the routing rule at index @idx
 *
 * Since: 1.18
 **/
NMIPRoutingRule *
nm_setting_ip_config_get_routing_rule(NMSettingIPConfig *setting, guint idx)
{
    NMSettingIPConfigPrivate *priv;

    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), NULL);

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);

    g_return_val_if_fail(priv->routing_rules && idx < priv->routing_rules->len, NULL);

    return priv->routing_rules->pdata[idx];
}

/**
 * nm_setting_ip_config_add_routing_rule:
 * @setting: the #NMSettingIPConfig
 * @routing_rule: the #NMIPRoutingRule to add. The address family
 *   of the added rule must be compatible with the setting.
 *
 * Appends a new routing-rule and associated information to the setting. The
 * given routing rules gets sealed and the reference count is incremented.
 * The function does not check whether an identical rule already exists
 * and always appends the rule to the end of the list.
 *
 * Since: 1.18
 **/
void
nm_setting_ip_config_add_routing_rule(NMSettingIPConfig *setting, NMIPRoutingRule *routing_rule)
{
    NMSettingIPConfigPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));
    g_return_if_fail(NM_IS_IP_ROUTING_RULE(routing_rule, TRUE));
    g_return_if_fail(_ip_routing_rule_get_addr_family(routing_rule)
                     == NM_SETTING_IP_CONFIG_GET_FAMILY(setting));

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);

    if (!priv->routing_rules)
        priv->routing_rules =
            g_ptr_array_new_with_free_func((GDestroyNotify) nm_ip_routing_rule_unref);

    nm_ip_routing_rule_seal(routing_rule);
    g_ptr_array_add(priv->routing_rules, nm_ip_routing_rule_ref(routing_rule));
    _routing_rules_notify(setting);
}

/**
 * nm_setting_ip_config_remove_routing_rule:
 * @setting: the #NMSettingIPConfig
 * @idx: index number of the routing_rule
 *
 * Removes the routing_rule at index @idx.
 *
 * Since: 1.18
 **/
void
nm_setting_ip_config_remove_routing_rule(NMSettingIPConfig *setting, guint idx)
{
    NMSettingIPConfigPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    g_return_if_fail(priv->routing_rules && idx < priv->routing_rules->len);

    g_ptr_array_remove_index(priv->routing_rules, idx);
    _routing_rules_notify(setting);
}

/**
 * nm_setting_ip_config_clear_routing_rules:
 * @setting: the #NMSettingIPConfig
 *
 * Removes all configured routing rules.
 *
 * Since: 1.18
 **/
void
nm_setting_ip_config_clear_routing_rules(NMSettingIPConfig *setting)
{
    NMSettingIPConfigPrivate *priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));

    if (priv->routing_rules && priv->routing_rules->len > 0) {
        g_ptr_array_set_size(priv->routing_rules, 0);
        _routing_rules_notify(setting);
    }
}

static GVariant *
_routing_rules_dbus_only_synth(const NMSettInfoSetting *               sett_info,
                               guint                                   property_idx,
                               NMConnection *                          connection,
                               NMSetting *                             setting,
                               NMConnectionSerializationFlags          flags,
                               const NMConnectionSerializationOptions *options)
{
    NMSettingIPConfig *       self = NM_SETTING_IP_CONFIG(setting);
    NMSettingIPConfigPrivate *priv;
    GVariantBuilder           builder;
    gboolean                  any = FALSE;
    guint                     i;

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(self);

    if (!priv->routing_rules || priv->routing_rules->len == 0)
        return NULL;

    for (i = 0; i < priv->routing_rules->len; i++) {
        GVariant *variant;

        variant = nm_ip_routing_rule_to_dbus(priv->routing_rules->pdata[i]);
        if (!variant)
            continue;

        if (!any) {
            any = TRUE;
            g_variant_builder_init(&builder, G_VARIANT_TYPE("aa{sv}"));
        }
        g_variant_builder_add(&builder, "@a{sv}", variant);
    }

    return any ? g_variant_builder_end(&builder) : NULL;
}

static gboolean
_routing_rules_dbus_only_set(NMSetting *         setting,
                             GVariant *          connection_dict,
                             const char *        property,
                             GVariant *          value,
                             NMSettingParseFlags parse_flags,
                             GError **           error)
{
    GVariantIter iter_rules;
    GVariant *   rule_var;
    guint        i_rule;
    gboolean     success       = FALSE;
    gboolean     rules_changed = FALSE;

    nm_assert(g_variant_is_of_type(value, G_VARIANT_TYPE("aa{sv}")));

    g_variant_iter_init(&iter_rules, value);

    i_rule = 0;
    while (g_variant_iter_next(&iter_rules, "@a{sv}", &rule_var)) {
        _nm_unused gs_unref_variant GVariant *rule_var_unref = rule_var;
        nm_auto_unref_ip_routing_rule NMIPRoutingRule *rule  = NULL;
        gs_free_error GError *local                          = NULL;

        i_rule++;

        rule =
            nm_ip_routing_rule_from_dbus(rule_var,
                                         NM_FLAGS_HAS(parse_flags, NM_SETTING_PARSE_FLAGS_STRICT),
                                         &local);
        if (!rule) {
            if (NM_FLAGS_HAS(parse_flags, NM_SETTING_PARSE_FLAGS_STRICT)) {
                g_set_error(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_MISSING_PROPERTY,
                            _("rule #%u is invalid: %s"),
                            i_rule,
                            local->message);
                goto out;
            }
            continue;
        }

        nm_setting_ip_config_add_routing_rule(NM_SETTING_IP_CONFIG(setting), rule);
        rules_changed = TRUE;
    }

    success = TRUE;

out:
    if (rules_changed)
        _routing_rules_notify(NM_SETTING_IP_CONFIG(setting));
    return success;
}

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

/**
 * nm_setting_ip_config_get_ignore_auto_routes:
 * @setting: the #NMSettingIPConfig
 *
 * Returns the value contained in the #NMSettingIPConfig:ignore-auto-routes
 * property.
 *
 * Returns: %TRUE if automatically configured (ie via DHCP) routes should be
 * ignored.
 **/
gboolean
nm_setting_ip_config_get_ignore_auto_routes(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), FALSE);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->ignore_auto_routes;
}

/**
 * nm_setting_ip_config_get_ignore_auto_dns:
 * @setting: the #NMSettingIPConfig
 *
 * Returns the value contained in the #NMSettingIPConfig:ignore-auto-dns
 * property.
 *
 * Returns: %TRUE if automatically configured (ie via DHCP) DNS information
 * should be ignored.
 **/
gboolean
nm_setting_ip_config_get_ignore_auto_dns(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), FALSE);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->ignore_auto_dns;
}

/**
 * nm_setting_ip_config_get_dhcp_hostname:
 * @setting: the #NMSettingIPConfig
 *
 * Returns the value contained in the #NMSettingIPConfig:dhcp-hostname
 * property.
 *
 * Returns: the configured hostname to send to the DHCP server
 **/
const char *
nm_setting_ip_config_get_dhcp_hostname(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), NULL);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->dhcp_hostname;
}

/**
 * nm_setting_ip_config_get_dhcp_send_hostname:
 * @setting: the #NMSettingIPConfig
 *
 * Returns the value contained in the #NMSettingIPConfig:dhcp-send-hostname
 * property.
 *
 * Returns: %TRUE if NetworkManager should send the machine hostname to the
 * DHCP server when requesting addresses to allow the server to automatically
 * update DNS information for this machine.
 **/
gboolean
nm_setting_ip_config_get_dhcp_send_hostname(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), FALSE);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->dhcp_send_hostname;
}

/**
 * nm_setting_ip_config_get_never_default:
 * @setting: the #NMSettingIPConfig
 *
 * Returns the value contained in the #NMSettingIPConfig:never-default
 * property.
 *
 * Returns: %TRUE if this connection should never be the default
 *   connection
 **/
gboolean
nm_setting_ip_config_get_never_default(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), FALSE);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->never_default;
}

/**
 * nm_setting_ip_config_get_may_fail:
 * @setting: the #NMSettingIPConfig
 *
 * Returns the value contained in the #NMSettingIPConfig:may-fail
 * property.
 *
 * Returns: %TRUE if this connection doesn't require this type of IP
 * addressing to complete for the connection to succeed.
 **/
gboolean
nm_setting_ip_config_get_may_fail(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), FALSE);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->may_fail;
}

/**
 * nm_setting_ip_config_get_dad_timeout:
 * @setting: the #NMSettingIPConfig
 *
 * Returns: the #NMSettingIPConfig:dad-timeout property.
 *
 * Since: 1.2
 **/
int
nm_setting_ip_config_get_dad_timeout(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), 0);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->dad_timeout;
}

/**
 * nm_setting_ip_config_get_dhcp_hostname_flags:
 * @setting: the #NMSettingIPConfig
 *
 * Returns the value contained in the #NMSettingIPConfig:dhcp-hostname-flags
 * property.
 *
 * Returns: flags for the DHCP hostname and FQDN
 *
 * Since: 1.22
 */
NMDhcpHostnameFlags
nm_setting_ip_config_get_dhcp_hostname_flags(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), NM_DHCP_HOSTNAME_FLAG_NONE);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->dhcp_hostname_flags;
}

/**
 * nm_setting_ip_config_get_dhcp_timeout:
 * @setting: the #NMSettingIPConfig
 *
 * Returns the value contained in the #NMSettingIPConfig:dhcp-timeout
 * property.
 *
 * Returns: the configured DHCP timeout in seconds. 0 = default for
 * the particular kind of device.
 *
 * Since: 1.2
 **/
int
nm_setting_ip_config_get_dhcp_timeout(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), 0);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->dhcp_timeout;
}

/**
 * nm_setting_ip_config_get_required_timeout:
 * @setting: the #NMSettingIPConfig
 *
 * Returns the value contained in the #NMSettingIPConfig:required-timeout
 * property.
 *
 * Returns: the required timeout for the address family
 *
 * Since: 1.34, 1.32.4
 **/
int
nm_setting_ip_config_get_required_timeout(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), -1);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->required_timeout;
}

/**
 * nm_setting_ip_config_get_dhcp_iaid:
 * @setting: the #NMSettingIPConfig
 *
 * Returns the value contained in the #NMSettingIPConfig:dhcp-iaid
 * property.
 *
 * Returns: the configured DHCP IAID (Identity Association Identifier)
 *
 * Since: 1.22
 **/
const char *
nm_setting_ip_config_get_dhcp_iaid(NMSettingIPConfig *setting)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), NULL);

    return NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->dhcp_iaid;
}

/**
 * nm_setting_ip_config_get_dhcp_reject_servers:
 * @setting: the #NMSettingIPConfig
 * @out_len: (allow-none) (out): the number of returned elements
 *
 * Returns: (array length=out_len zero-terminated=1) (transfer none):
 *   A %NULL terminated array of DHCP reject servers. Even if no reject
 *   servers are configured, this always returns a non %NULL value.
 *
 * Since: 1.28
 */
const char *const *
nm_setting_ip_config_get_dhcp_reject_servers(NMSettingIPConfig *setting, guint *out_len)
{
    g_return_val_if_fail(NM_IS_SETTING_IP_CONFIG(setting), NULL);
    return nm_strvarray_get_strv(&NM_SETTING_IP_CONFIG_GET_PRIVATE(setting)->dhcp_reject_servers,
                                 out_len);
}

/**
 * nm_setting_ip_config_add_dhcp_reject_server:
 * @setting: the #NMSettingIPConfig
 * @server: the DHCP reject server to add
 *
 * Adds a new DHCP reject server to the setting.
 *
 * Since: 1.28
 **/
void
nm_setting_ip_config_add_dhcp_reject_server(NMSettingIPConfig *setting, const char *server)
{
    NMSettingIPConfigPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));
    g_return_if_fail(server != NULL);
    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);

    nm_strvarray_add(nm_strvarray_ensure(&priv->dhcp_reject_servers), server);
    _notify(setting, PROP_DHCP_REJECT_SERVERS);
}

/**
 * nm_setting_ip_config_remove_dhcp_reject_server:
 * @setting: the #NMSettingIPConfig
 * @idx: index number of the DHCP reject server
 *
 * Removes the DHCP reject server at index @idx.
 *
 * Since: 1.28
 **/
void
nm_setting_ip_config_remove_dhcp_reject_server(NMSettingIPConfig *setting, guint idx)
{
    NMSettingIPConfigPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));
    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    g_return_if_fail(priv->dhcp_reject_servers && idx < priv->dhcp_reject_servers->len);

    g_array_remove_index(priv->dhcp_reject_servers, idx);
    _notify(setting, PROP_DHCP_REJECT_SERVERS);
}

/**
 * nm_setting_ip_config_clear_dhcp_reject_servers:
 * @setting: the #NMSettingIPConfig
 *
 * Removes all configured DHCP reject servers.
 *
 * Since: 1.28
 **/
void
nm_setting_ip_config_clear_dhcp_reject_servers(NMSettingIPConfig *setting)
{
    NMSettingIPConfigPrivate *priv;

    g_return_if_fail(NM_IS_SETTING_IP_CONFIG(setting));

    priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    if (nm_g_array_len(priv->dhcp_reject_servers) != 0) {
        nm_clear_pointer(&priv->dhcp_reject_servers, g_array_unref);
        _notify(setting, PROP_DHCP_REJECT_SERVERS);
    }
}

static gboolean
verify_label(const char *label)
{
    const char *p;
    char *      iface;

    p = strchr(label, ':');
    if (!p)
        return FALSE;
    iface = g_strndup(label, p - label);
    if (!nm_utils_ifname_valid_kernel(iface, NULL)) {
        g_free(iface);
        return FALSE;
    }
    g_free(iface);

    for (p++; *p; p++) {
        if (!g_ascii_isalnum(*p) && *p != '_')
            return FALSE;
    }

    return TRUE;
}

static gboolean
verify(NMSetting *setting, NMConnection *connection, GError **error)
{
    NMSettingIPConfigPrivate *priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    guint                     i;

    if (!priv->method) {
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_MISSING_PROPERTY,
                            _("property is missing"));
        g_prefix_error(error, "%s.%s: ", nm_setting_get_name(setting), NM_SETTING_IP_CONFIG_METHOD);
        return FALSE;
    }

    if (priv->dhcp_hostname && !*priv->dhcp_hostname) {
        g_set_error_literal(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("property is empty"));
        g_prefix_error(error,
                       "%s.%s: ",
                       nm_setting_get_name(setting),
                       NM_SETTING_IP_CONFIG_DHCP_HOSTNAME);
        return FALSE;
    }

    /* Validate DNS */
    for (i = 0; i < priv->dns->len; i++) {
        const char *dns = priv->dns->pdata[i];

        if (!nm_utils_ipaddr_is_valid(NM_SETTING_IP_CONFIG_GET_FAMILY(setting), dns)) {
            g_set_error(error,
                        NM_CONNECTION_ERROR,
                        NM_CONNECTION_ERROR_INVALID_PROPERTY,
                        _("%d. DNS server address is invalid"),
                        (int) (i + 1));
            g_prefix_error(error,
                           "%s.%s: ",
                           nm_setting_get_name(setting),
                           NM_SETTING_IP_CONFIG_DNS);
            return FALSE;
        }
    }

    /* Validate addresses */
    for (i = 0; i < priv->addresses->len; i++) {
        NMIPAddress *addr = (NMIPAddress *) priv->addresses->pdata[i];
        GVariant *   label;

        if (nm_ip_address_get_family(addr) != NM_SETTING_IP_CONFIG_GET_FAMILY(setting)) {
            g_set_error(error,
                        NM_CONNECTION_ERROR,
                        NM_CONNECTION_ERROR_INVALID_PROPERTY,
                        _("%d. IP address is invalid"),
                        (int) (i + 1));
            g_prefix_error(error,
                           "%s.%s: ",
                           nm_setting_get_name(setting),
                           NM_SETTING_IP_CONFIG_ADDRESSES);
            return FALSE;
        }

        label = nm_ip_address_get_attribute(addr, NM_IP_ADDRESS_ATTRIBUTE_LABEL);
        if (label) {
            if (!g_variant_is_of_type(label, G_VARIANT_TYPE_STRING)) {
                g_set_error(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("%d. IP address has 'label' property with invalid type"),
                            (int) (i + 1));
                g_prefix_error(error,
                               "%s.%s: ",
                               nm_setting_get_name(setting),
                               NM_SETTING_IP_CONFIG_ADDRESSES);
                return FALSE;
            }
            if (!verify_label(g_variant_get_string(label, NULL))) {
                g_set_error(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("%d. IP address has invalid label '%s'"),
                            (int) (i + 1),
                            g_variant_get_string(label, NULL));
                g_prefix_error(error,
                               "%s.%s: ",
                               nm_setting_get_name(setting),
                               NM_SETTING_IP_CONFIG_ADDRESSES);
                return FALSE;
            }
        }
    }

    /* Validate gateway */
    if (priv->gateway) {
        if (!priv->addresses->len) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_PROPERTY,
                                _("gateway cannot be set if there are no addresses configured"));
            g_prefix_error(error,
                           "%s.%s: ",
                           nm_setting_get_name(setting),
                           NM_SETTING_IP_CONFIG_GATEWAY);
            return FALSE;
        }

        if (!nm_utils_ipaddr_is_valid(NM_SETTING_IP_CONFIG_GET_FAMILY(setting), priv->gateway)) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_PROPERTY,
                                _("gateway is invalid"));
            g_prefix_error(error,
                           "%s.%s: ",
                           nm_setting_get_name(setting),
                           NM_SETTING_IP_CONFIG_GATEWAY);
            return FALSE;
        }
    }

    /* Validate routes */
    for (i = 0; i < priv->routes->len; i++) {
        gs_free_error GError *local = NULL;
        NMIPRoute *           route = (NMIPRoute *) priv->routes->pdata[i];

        if (nm_ip_route_get_family(route) != NM_SETTING_IP_CONFIG_GET_FAMILY(setting)) {
            g_set_error(error,
                        NM_CONNECTION_ERROR,
                        NM_CONNECTION_ERROR_INVALID_PROPERTY,
                        _("%d. route is invalid"),
                        (int) (i + 1));
            g_prefix_error(error,
                           "%s.%s: ",
                           nm_setting_get_name(setting),
                           NM_SETTING_IP_CONFIG_ROUTES);
            return FALSE;
        }

        if (!_nm_ip_route_attribute_validate_all(route, &local)) {
            g_set_error(error,
                        NM_CONNECTION_ERROR,
                        NM_CONNECTION_ERROR_INVALID_PROPERTY,
                        _("invalid attribute: %s"),
                        local->message);
            g_prefix_error(error,
                           "%s.%s: ",
                           nm_setting_get_name(setting),
                           NM_SETTING_IP_CONFIG_ROUTES);
            return FALSE;
        }
    }

    if (priv->routing_rules) {
        for (i = 0; i < priv->routing_rules->len; i++) {
            NMIPRoutingRule *rule       = priv->routing_rules->pdata[i];
            gs_free_error GError *local = NULL;

            if (_ip_routing_rule_get_addr_family(rule)
                != NM_SETTING_IP_CONFIG_GET_FAMILY(setting)) {
                g_set_error(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("%u. rule has wrong address-family"),
                            i + 1);
                g_prefix_error(error,
                               "%s.%s: ",
                               nm_setting_get_name(setting),
                               NM_SETTING_IP_CONFIG_ROUTING_RULES);
                return FALSE;
            }
            if (!nm_ip_routing_rule_validate(rule, &local)) {
                g_set_error(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("%u. rule is invalid: %s"),
                            i + 1,
                            local->message);
                g_prefix_error(error,
                               "%s.%s: ",
                               nm_setting_get_name(setting),
                               NM_SETTING_IP_CONFIG_ROUTES);
                return FALSE;
            }
        }
    }

    if (priv->dhcp_iaid && !_nm_utils_iaid_verify(priv->dhcp_iaid, NULL)) {
        g_set_error(error,
                    NM_CONNECTION_ERROR,
                    NM_CONNECTION_ERROR_INVALID_PROPERTY,
                    _("'%s' is not a valid IAID"),
                    priv->dhcp_iaid);
        g_prefix_error(error,
                       "%s.%s: ",
                       nm_setting_get_name(setting),
                       NM_SETTING_IP_CONFIG_DHCP_IAID);
        return FALSE;
    }

    /* Validate DHCP hostname flags */
    if (priv->dhcp_hostname_flags != NM_DHCP_HOSTNAME_FLAG_NONE && !priv->dhcp_send_hostname) {
        g_set_error(error,
                    NM_CONNECTION_ERROR,
                    NM_CONNECTION_ERROR_INVALID_PROPERTY,
                    _("the property cannot be set when '%s' is disabled"),
                    NM_SETTING_IP_CONFIG_DHCP_SEND_HOSTNAME);
        g_prefix_error(error,
                       "%s.%s: ",
                       nm_setting_get_name(setting),
                       NM_SETTING_IP_CONFIG_DHCP_HOSTNAME_FLAGS);
        return FALSE;
    }

    if (!_nm_utils_validate_dhcp_hostname_flags(priv->dhcp_hostname_flags,
                                                NM_SETTING_IP_CONFIG_GET_FAMILY(setting),
                                                error)) {
        g_prefix_error(error,
                       "%s.%s: ",
                       nm_setting_get_name(setting),
                       NM_SETTING_IP_CONFIG_DHCP_HOSTNAME_FLAGS);
        return FALSE;
    }

    /* Validate reject servers */
    if (priv->dhcp_reject_servers && priv->dhcp_reject_servers->len != 0) {
        if (NM_SETTING_IP_CONFIG_GET_FAMILY(setting) != AF_INET) {
            g_set_error_literal(error,
                                NM_CONNECTION_ERROR,
                                NM_CONNECTION_ERROR_INVALID_PROPERTY,
                                _("the property is currently supported only for DHCPv4"));
            g_prefix_error(error,
                           "%s.%s: ",
                           nm_setting_get_name(setting),
                           NM_SETTING_IP_CONFIG_DHCP_REJECT_SERVERS);
            return FALSE;
        }

        for (i = 0; i < priv->dhcp_reject_servers->len; i++) {
            if (!nm_utils_parse_inaddr_prefix(
                    NM_SETTING_IP_CONFIG_GET_FAMILY(setting),
                    g_array_index(priv->dhcp_reject_servers, const char *, i),
                    NULL,
                    NULL)) {
                g_set_error(error,
                            NM_CONNECTION_ERROR,
                            NM_CONNECTION_ERROR_INVALID_PROPERTY,
                            _("'%s' is not a valid IP or subnet"),
                            g_array_index(priv->dhcp_reject_servers, const char *, i));
                g_prefix_error(error,
                               "%s.%s: ",
                               nm_setting_get_name(setting),
                               NM_SETTING_IP_CONFIG_DHCP_REJECT_SERVERS);
                return FALSE;
            }
        }
    }

    /* Normalizable errors */
    if (priv->gateway && priv->never_default) {
        g_set_error(error,
                    NM_CONNECTION_ERROR,
                    NM_CONNECTION_ERROR_INVALID_PROPERTY,
                    _("a gateway is incompatible with '%s'"),
                    NM_SETTING_IP_CONFIG_NEVER_DEFAULT);
        g_prefix_error(error,
                       "%s.%s: ",
                       nm_setting_get_name(setting),
                       NM_SETTING_IP_CONFIG_GATEWAY);
        return NM_SETTING_VERIFY_NORMALIZABLE_ERROR;
    }

    return TRUE;
}

static NMTernary
compare_property(const NMSettInfoSetting *sett_info,
                 guint                    property_idx,
                 NMConnection *           con_a,
                 NMSetting *              set_a,
                 NMConnection *           con_b,
                 NMSetting *              set_b,
                 NMSettingCompareFlags    flags)
{
    NMSettingIPConfigPrivate *a_priv;
    NMSettingIPConfigPrivate *b_priv;
    guint                     i;

    if (nm_streq(sett_info->property_infos[property_idx].name, NM_SETTING_IP_CONFIG_ADDRESSES)) {
        if (set_b) {
            a_priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(set_a);
            b_priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(set_b);

            if (a_priv->addresses->len != b_priv->addresses->len)
                return FALSE;
            for (i = 0; i < a_priv->addresses->len; i++) {
                if (nm_ip_address_cmp_full(a_priv->addresses->pdata[i],
                                           b_priv->addresses->pdata[i],
                                           NM_IP_ADDRESS_CMP_FLAGS_WITH_ATTRS)
                    != 0)
                    return FALSE;
            }
        }
        return TRUE;
    }

    if (nm_streq(sett_info->property_infos[property_idx].name, NM_SETTING_IP_CONFIG_ROUTES)) {
        if (set_b) {
            a_priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(set_a);
            b_priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(set_b);

            if (a_priv->routes->len != b_priv->routes->len)
                return FALSE;
            for (i = 0; i < a_priv->routes->len; i++) {
                if (!nm_ip_route_equal_full(a_priv->routes->pdata[i],
                                            b_priv->routes->pdata[i],
                                            NM_IP_ROUTE_EQUAL_CMP_FLAGS_WITH_ATTRS))
                    return FALSE;
            }
        }
        return TRUE;
    }

    if (nm_streq(sett_info->property_infos[property_idx].name,
                 NM_SETTING_IP_CONFIG_ROUTING_RULES)) {
        if (set_b) {
            guint n;

            a_priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(set_a);
            b_priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(set_b);

            n = (a_priv->routing_rules) ? a_priv->routing_rules->len : 0u;
            if (n != (b_priv->routing_rules ? b_priv->routing_rules->len : 0u))
                return FALSE;
            for (i = 0; i < n; i++) {
                if (nm_ip_routing_rule_cmp(a_priv->routing_rules->pdata[i],
                                           b_priv->routing_rules->pdata[i])
                    != 0)
                    return FALSE;
            }
        }
        return TRUE;
    }

    return NM_SETTING_CLASS(nm_setting_ip_config_parent_class)
        ->compare_property(sett_info, property_idx, con_a, set_a, con_b, set_b, flags);
}

static void
duplicate_copy_properties(const NMSettInfoSetting *sett_info, NMSetting *src, NMSetting *dst)
{
    NMSettingIPConfigPrivate *priv_src = NM_SETTING_IP_CONFIG_GET_PRIVATE(src);
    NMSettingIPConfigPrivate *priv_dst = NM_SETTING_IP_CONFIG_GET_PRIVATE(dst);
    guint                     i;
    gboolean                  changed = FALSE;

    NM_SETTING_CLASS(nm_setting_ip_config_parent_class)
        ->duplicate_copy_properties(sett_info, src, dst);

    if (priv_dst->routing_rules && priv_dst->routing_rules->len > 0) {
        changed = TRUE;
        g_ptr_array_set_size(priv_dst->routing_rules, 0);
    }
    if (priv_src->routing_rules && priv_src->routing_rules->len > 0) {
        changed = TRUE;
        if (!priv_dst->routing_rules)
            priv_dst->routing_rules =
                g_ptr_array_new_with_free_func((GDestroyNotify) nm_ip_routing_rule_unref);
        for (i = 0; i < priv_src->routing_rules->len; i++) {
            g_ptr_array_add(priv_dst->routing_rules,
                            nm_ip_routing_rule_ref(priv_src->routing_rules->pdata[i]));
        }
    }
    if (changed)
        _routing_rules_notify(NM_SETTING_IP_CONFIG(dst));
}

static void
enumerate_values(const NMSettInfoProperty *property_info,
                 NMSetting *               setting,
                 NMSettingValueIterFn      func,
                 gpointer                  user_data)
{
    if (nm_streq(property_info->name, NM_SETTING_IP_CONFIG_ROUTING_RULES)) {
        NMSettingIPConfigPrivate *  priv  = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
        nm_auto_unset_gvalue GValue value = G_VALUE_INIT;
        GPtrArray *                 ptr   = NULL;
        guint                       i;

        if (priv->routing_rules && priv->routing_rules->len > 0) {
            ptr = g_ptr_array_new_with_free_func((GDestroyNotify) nm_ip_routing_rule_unref);
            for (i = 0; i < priv->routing_rules->len; i++)
                g_ptr_array_add(ptr, nm_ip_routing_rule_ref(priv->routing_rules->pdata[i]));
        }
        g_value_init(&value, G_TYPE_PTR_ARRAY);
        g_value_take_boxed(&value, ptr);
        func(setting, property_info->name, &value, 0, user_data);
        return;
    }

    NM_SETTING_CLASS(nm_setting_ip_config_parent_class)
        ->enumerate_values(property_info, setting, func, user_data);
}

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

static gboolean
ip_gateway_set(NMSetting *         setting,
               GVariant *          connection_dict,
               const char *        property,
               GVariant *          value,
               NMSettingParseFlags parse_flags,
               GError **           error)
{
    /* FIXME: properly handle errors */

    /* Don't set from 'gateway' if we're going to use the gateway in 'addresses' */
    if (_nm_setting_use_legacy_property(setting, connection_dict, "addresses", "gateway"))
        return TRUE;

    g_object_set(setting, property, g_variant_get_string(value, NULL), NULL);
    return TRUE;
}

GArray *
_nm_sett_info_property_override_create_array_ip_config(void)
{
    GArray *properties_override = _nm_sett_info_property_override_create_array();

    _nm_properties_override_gobj(
        properties_override,
        obj_properties[PROP_METHOD],
        &nm_sett_info_propert_type_string,
        .to_dbus_data.get_string =
            (const char *(*) (NMSetting *) ) nm_setting_ip_config_get_method);

    _nm_properties_override_gobj(
        properties_override,
        obj_properties[PROP_GATEWAY],
        NM_SETT_INFO_PROPERT_TYPE_DBUS(G_VARIANT_TYPE_STRING,
                                       .to_dbus_fcn   = _nm_setting_property_to_dbus_fcn_get_string,
                                       .from_dbus_fcn = ip_gateway_set),
        .to_dbus_data.get_string =
            (const char *(*) (NMSetting *) ) nm_setting_ip_config_get_gateway);

    _nm_properties_override_gobj(
        properties_override,
        obj_properties[PROP_DHCP_HOSTNAME],
        &nm_sett_info_propert_type_string,
        .to_dbus_data.get_string =
            (const char *(*) (NMSetting *) ) nm_setting_ip_config_get_dhcp_hostname);

    _nm_properties_override_gobj(
        properties_override,
        obj_properties[PROP_DHCP_IAID],
        &nm_sett_info_propert_type_string,
        .to_dbus_data.get_string =
            (const char *(*) (NMSetting *) ) nm_setting_ip_config_get_dhcp_iaid);

    /* ---dbus---
     * property: routing-rules
     * format: array of 'a{sv}'
     * description: Array of dictionaries for routing rules.
     * ---end---
     */
    _nm_properties_override_dbus(
        properties_override,
        NM_SETTING_IP_CONFIG_ROUTING_RULES,
        NM_SETT_INFO_PROPERT_TYPE_DBUS(NM_G_VARIANT_TYPE("aa{sv}"),
                                       .to_dbus_fcn   = _routing_rules_dbus_only_synth,
                                       .from_dbus_fcn = _routing_rules_dbus_only_set, ));

    _nm_properties_override_gobj(properties_override,
                                 obj_properties[PROP_IGNORE_AUTO_ROUTES],
                                 &nm_sett_info_propert_type_boolean,
                                 .to_dbus_data.get_boolean = (gboolean(*)(
                                     NMSetting *)) nm_setting_ip_config_get_ignore_auto_routes);

    _nm_properties_override_gobj(properties_override,
                                 obj_properties[PROP_IGNORE_AUTO_DNS],
                                 &nm_sett_info_propert_type_boolean,
                                 .to_dbus_data.get_boolean = (gboolean(*)(
                                     NMSetting *)) nm_setting_ip_config_get_ignore_auto_dns);

    _nm_properties_override_gobj(properties_override,
                                 obj_properties[PROP_DHCP_SEND_HOSTNAME],
                                 &nm_sett_info_propert_type_boolean,
                                 .to_dbus_data.get_boolean = (gboolean(*)(
                                     NMSetting *)) nm_setting_ip_config_get_dhcp_send_hostname);

    _nm_properties_override_gobj(properties_override,
                                 obj_properties[PROP_NEVER_DEFAULT],
                                 &nm_sett_info_propert_type_boolean,
                                 .to_dbus_data.get_boolean = (gboolean(*)(
                                     NMSetting *)) nm_setting_ip_config_get_never_default);

    _nm_properties_override_gobj(properties_override,
                                 obj_properties[PROP_MAY_FAIL],
                                 &nm_sett_info_propert_type_boolean,
                                 .to_dbus_data.get_boolean =
                                     (gboolean(*)(NMSetting *)) nm_setting_ip_config_get_may_fail);

    return properties_override;
}

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

static void
get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
    NMSettingIPConfig *       setting = NM_SETTING_IP_CONFIG(object);
    NMSettingIPConfigPrivate *priv    = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);

    switch (prop_id) {
    case PROP_METHOD:
        g_value_set_string(value, nm_setting_ip_config_get_method(setting));
        break;
    case PROP_DNS:
        g_value_take_boxed(value, _nm_utils_ptrarray_to_strv(priv->dns));
        break;
    case PROP_DNS_SEARCH:
        g_value_take_boxed(value, _nm_utils_ptrarray_to_strv(priv->dns_search));
        break;
    case PROP_DNS_OPTIONS:
        g_value_take_boxed(value,
                           priv->dns_options ? _nm_utils_ptrarray_to_strv(priv->dns_options)
                                             : NULL);
        break;
    case PROP_DNS_PRIORITY:
        g_value_set_int(value, priv->dns_priority);
        break;
    case PROP_ADDRESSES:
        g_value_take_boxed(value,
                           _nm_utils_copy_array(priv->addresses,
                                                (NMUtilsCopyFunc) nm_ip_address_dup,
                                                (GDestroyNotify) nm_ip_address_unref));
        break;
    case PROP_GATEWAY:
        g_value_set_string(value, nm_setting_ip_config_get_gateway(setting));
        break;
    case PROP_ROUTES:
        g_value_take_boxed(value,
                           _nm_utils_copy_array(priv->routes,
                                                (NMUtilsCopyFunc) nm_ip_route_dup,
                                                (GDestroyNotify) nm_ip_route_unref));
        break;
    case PROP_ROUTE_METRIC:
        g_value_set_int64(value, priv->route_metric);
        break;
    case PROP_ROUTE_TABLE:
        g_value_set_uint(value, priv->route_table);
        break;
    case PROP_IGNORE_AUTO_ROUTES:
        g_value_set_boolean(value, nm_setting_ip_config_get_ignore_auto_routes(setting));
        break;
    case PROP_IGNORE_AUTO_DNS:
        g_value_set_boolean(value, nm_setting_ip_config_get_ignore_auto_dns(setting));
        break;
    case PROP_DHCP_HOSTNAME:
        g_value_set_string(value, nm_setting_ip_config_get_dhcp_hostname(setting));
        break;
    case PROP_DHCP_SEND_HOSTNAME:
        g_value_set_boolean(value, nm_setting_ip_config_get_dhcp_send_hostname(setting));
        break;
    case PROP_NEVER_DEFAULT:
        g_value_set_boolean(value, priv->never_default);
        break;
    case PROP_MAY_FAIL:
        g_value_set_boolean(value, priv->may_fail);
        break;
    case PROP_DAD_TIMEOUT:
        g_value_set_int(value, nm_setting_ip_config_get_dad_timeout(setting));
        break;
    case PROP_DHCP_TIMEOUT:
        g_value_set_int(value, nm_setting_ip_config_get_dhcp_timeout(setting));
        break;
    case PROP_REQUIRED_TIMEOUT:
        g_value_set_int(value, nm_setting_ip_config_get_required_timeout(setting));
        break;
    case PROP_DHCP_IAID:
        g_value_set_string(value, nm_setting_ip_config_get_dhcp_iaid(setting));
        break;
    case PROP_DHCP_HOSTNAME_FLAGS:
        g_value_set_uint(value, nm_setting_ip_config_get_dhcp_hostname_flags(setting));
        break;
    case PROP_DHCP_REJECT_SERVERS:
        g_value_set_boxed(value, nm_strvarray_get_strv_non_empty(priv->dhcp_reject_servers, NULL));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
        break;
    }
}

static void
set_property(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
    NMSettingIPConfig *       setting = NM_SETTING_IP_CONFIG(object);
    NMSettingIPConfigPrivate *priv    = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);
    const char *              gateway;
    char **                   strv;
    guint                     i;

    switch (prop_id) {
    case PROP_METHOD:
        g_free(priv->method);
        priv->method = g_value_dup_string(value);
        break;
    case PROP_DNS:
        g_ptr_array_unref(priv->dns);
        priv->dns = _nm_utils_strv_to_ptrarray(g_value_get_boxed(value));
        break;
    case PROP_DNS_SEARCH:
        g_ptr_array_unref(priv->dns_search);
        priv->dns_search = _nm_utils_strv_to_ptrarray(g_value_get_boxed(value));
        break;
    case PROP_DNS_OPTIONS:
        strv = g_value_get_boxed(value);
        if (!strv) {
            if (priv->dns_options) {
                g_ptr_array_unref(priv->dns_options);
                priv->dns_options = NULL;
            }
        } else {
            if (priv->dns_options)
                g_ptr_array_set_size(priv->dns_options, 0);
            else
                priv->dns_options = g_ptr_array_new_with_free_func(g_free);
            for (i = 0; strv[i]; i++) {
                if (_nm_utils_dns_option_validate(strv[i], NULL, NULL, FALSE, NULL)
                    && _nm_utils_dns_option_find_idx(priv->dns_options, strv[i]) < 0)
                    g_ptr_array_add(priv->dns_options, g_strdup(strv[i]));
            }
        }
        break;
    case PROP_DNS_PRIORITY:
        priv->dns_priority = g_value_get_int(value);
        break;
    case PROP_ADDRESSES:
        g_ptr_array_unref(priv->addresses);
        priv->addresses = _nm_utils_copy_array(g_value_get_boxed(value),
                                               (NMUtilsCopyFunc) nm_ip_address_dup,
                                               (GDestroyNotify) nm_ip_address_unref);
        break;
    case PROP_GATEWAY:
        gateway = g_value_get_string(value);
        g_return_if_fail(
            !gateway
            || nm_utils_ipaddr_is_valid(NM_SETTING_IP_CONFIG_GET_FAMILY(setting), gateway));
        g_free(priv->gateway);
        priv->gateway = canonicalize_ip(NM_SETTING_IP_CONFIG_GET_FAMILY(setting), gateway, TRUE);
        break;
    case PROP_ROUTES:
        g_ptr_array_unref(priv->routes);
        priv->routes = _nm_utils_copy_array(g_value_get_boxed(value),
                                            (NMUtilsCopyFunc) nm_ip_route_dup,
                                            (GDestroyNotify) nm_ip_route_unref);
        break;
    case PROP_ROUTE_METRIC:
        priv->route_metric = g_value_get_int64(value);
        break;
    case PROP_ROUTE_TABLE:
        priv->route_table = g_value_get_uint(value);
        break;
    case PROP_IGNORE_AUTO_ROUTES:
        priv->ignore_auto_routes = g_value_get_boolean(value);
        break;
    case PROP_IGNORE_AUTO_DNS:
        priv->ignore_auto_dns = g_value_get_boolean(value);
        break;
    case PROP_DHCP_HOSTNAME:
        g_free(priv->dhcp_hostname);
        priv->dhcp_hostname = g_value_dup_string(value);
        break;
    case PROP_DHCP_SEND_HOSTNAME:
        priv->dhcp_send_hostname = g_value_get_boolean(value);
        break;
    case PROP_NEVER_DEFAULT:
        priv->never_default = g_value_get_boolean(value);
        break;
    case PROP_MAY_FAIL:
        priv->may_fail = g_value_get_boolean(value);
        break;
    case PROP_DAD_TIMEOUT:
        priv->dad_timeout = g_value_get_int(value);
        break;
    case PROP_DHCP_TIMEOUT:
        priv->dhcp_timeout = g_value_get_int(value);
        break;
    case PROP_REQUIRED_TIMEOUT:
        priv->required_timeout = g_value_get_int(value);
        break;
    case PROP_DHCP_IAID:
        g_free(priv->dhcp_iaid);
        priv->dhcp_iaid = g_value_dup_string(value);
        break;
    case PROP_DHCP_HOSTNAME_FLAGS:
        priv->dhcp_hostname_flags = g_value_get_uint(value);
        break;
    case PROP_DHCP_REJECT_SERVERS:
        nm_strvarray_set_strv(&priv->dhcp_reject_servers, g_value_get_boxed(value));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
        break;
    }
}

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

static void
nm_setting_ip_config_init(NMSettingIPConfig *setting)
{
    NMSettingIPConfigPrivate *priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(setting);

    priv->dns                = g_ptr_array_new_with_free_func(g_free);
    priv->dns_search         = g_ptr_array_new_with_free_func(g_free);
    priv->addresses          = g_ptr_array_new_with_free_func((GDestroyNotify) nm_ip_address_unref);
    priv->routes             = g_ptr_array_new_with_free_func((GDestroyNotify) nm_ip_route_unref);
    priv->route_metric       = -1;
    priv->dhcp_send_hostname = TRUE;
    priv->may_fail           = TRUE;
    priv->dad_timeout        = -1;
    priv->required_timeout   = -1;
}

static void
finalize(GObject *object)
{
    NMSettingIPConfig *       self = NM_SETTING_IP_CONFIG(object);
    NMSettingIPConfigPrivate *priv = NM_SETTING_IP_CONFIG_GET_PRIVATE(self);

    g_free(priv->method);
    g_free(priv->gateway);
    g_free(priv->dhcp_hostname);
    g_free(priv->dhcp_iaid);

    g_ptr_array_unref(priv->dns);
    g_ptr_array_unref(priv->dns_search);
    if (priv->dns_options)
        g_ptr_array_unref(priv->dns_options);
    g_ptr_array_unref(priv->addresses);
    g_ptr_array_unref(priv->routes);
    if (priv->routing_rules)
        g_ptr_array_unref(priv->routing_rules);
    nm_clear_pointer(&priv->dhcp_reject_servers, g_array_unref);

    G_OBJECT_CLASS(nm_setting_ip_config_parent_class)->finalize(object);
}

static void
nm_setting_ip_config_class_init(NMSettingIPConfigClass *klass)
{
    GObjectClass *  object_class  = G_OBJECT_CLASS(klass);
    NMSettingClass *setting_class = NM_SETTING_CLASS(klass);

    g_type_class_add_private(klass, sizeof(NMSettingIPConfigPrivate));

    object_class->get_property = get_property;
    object_class->set_property = set_property;
    object_class->finalize     = finalize;

    setting_class->verify                    = verify;
    setting_class->compare_property          = compare_property;
    setting_class->duplicate_copy_properties = duplicate_copy_properties;
    setting_class->enumerate_values          = enumerate_values;

    /**
     * NMSettingIPConfig:method:
     *
     * IP configuration method.
     *
     * #NMSettingIP4Config and #NMSettingIP6Config both support "disabled",
     * "auto", "manual", and "link-local". See the subclass-specific
     * documentation for other values.
     *
     * In general, for the "auto" method, properties such as
     * #NMSettingIPConfig:dns and #NMSettingIPConfig:routes specify information
     * that is added on to the information returned from automatic
     * configuration.  The #NMSettingIPConfig:ignore-auto-routes and
     * #NMSettingIPConfig:ignore-auto-dns properties modify this behavior.
     *
     * For methods that imply no upstream network, such as "shared" or
     * "link-local", these properties must be empty.
     *
     * For IPv4 method "shared", the IP subnet can be configured by adding one
     * manual IPv4 address or otherwise 10.42.x.0/24 is chosen. Note that the
     * shared method must be configured on the interface which shares the internet
     * to a subnet, not on the uplink which is shared.
     **/
    obj_properties[PROP_METHOD] = g_param_spec_string(
        NM_SETTING_IP_CONFIG_METHOD,
        "",
        "",
        NULL,
        G_PARAM_READWRITE | NM_SETTING_PARAM_INFERRABLE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:dns:
     *
     * Array of IP addresses of DNS servers.
     **/
    obj_properties[PROP_DNS] = g_param_spec_boxed(NM_SETTING_IP_CONFIG_DNS,
                                                  "",
                                                  "",
                                                  G_TYPE_STRV,
                                                  G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:dns-search:
     *
     * Array of DNS search domains. Domains starting with a tilde ('~')
     * are considered 'routing' domains and are used only to decide the
     * interface over which a query must be forwarded; they are not used
     * to complete unqualified host names.
     *
     * When using a DNS plugin that supports Conditional Forwarding or
     * Split DNS, then the search domains specify which name servers to
     * query. This makes the behavior different from running with plain
     * /etc/resolv.conf. For more information see also the dns-priority setting.
     **/
    obj_properties[PROP_DNS_SEARCH] =
        g_param_spec_boxed(NM_SETTING_IP_CONFIG_DNS_SEARCH,
                           "",
                           "",
                           G_TYPE_STRV,
                           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:dns-options:
     *
     * Array of DNS options as described in man 5 resolv.conf.
     *
     * %NULL means that the options are unset and left at the default.
     * In this case NetworkManager will use default options. This is
     * distinct from an empty list of properties.
     *
     * The currently supported options are "attempts", "debug", "edns0",
     * "inet6", "ip6-bytestring", "ip6-dotint", "ndots", "no-check-names",
     * "no-ip6-dotint", "no-reload", "no-tld-query", "rotate", "single-request",
     * "single-request-reopen", "timeout", "trust-ad", "use-vc".
     *
     * The "trust-ad" setting is only honored if the profile contributes
     * name servers to resolv.conf, and if all contributing profiles have
     * "trust-ad" enabled.
     *
     * When using a caching DNS plugin (dnsmasq or systemd-resolved in
     * NetworkManager.conf) then "edns0" and "trust-ad" are automatically
     * added.
     *
     * Since: 1.2
     **/
    obj_properties[PROP_DNS_OPTIONS] =
        g_param_spec_boxed(NM_SETTING_IP_CONFIG_DNS_OPTIONS,
                           "",
                           "",
                           G_TYPE_STRV,
                           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:dns-priority:
     *
     * DNS servers priority.
     *
     * The relative priority for DNS servers specified by this setting.  A lower
     * numerical value is better (higher priority).
     *
     * Negative values have the special effect of excluding other configurations
     * with a greater numerical priority value; so in presence of at least one negative
     * priority, only DNS servers from connections with the lowest priority value will be used.
     * To avoid all DNS leaks, set the priority of the profile that should be used
     * to the most negative value of all active connections profiles.
     *
     * Zero selects a globally configured default value. If the latter is missing
     * or zero too, it defaults to 50 for VPNs (including WireGuard) and 100 for
     * other connections.
     *
     * Note that the priority is to order DNS settings for multiple active
     * connections.  It does not disambiguate multiple DNS servers within the
     * same connection profile.
     *
     * When multiple devices have configurations with the same priority, VPNs will be
     * considered first, then devices with the best (lowest metric) default
     * route and then all other devices.
     *
     * When using dns=default, servers with higher priority will be on top of
     * resolv.conf. To prioritize a given server over another one within the
     * same connection, just specify them in the desired order.
     * Note that commonly the resolver tries name servers in /etc/resolv.conf
     * in the order listed, proceeding with the next server in the list
     * on failure. See for example the "rotate" option of the dns-options setting.
     * If there are any negative DNS priorities, then only name servers from
     * the devices with that lowest priority will be considered.
     *
     * When using a DNS resolver that supports Conditional Forwarding or
     * Split DNS (with dns=dnsmasq or dns=systemd-resolved settings), each connection
     * is used to query domains in its search list. The search domains determine which
     * name servers to ask, and the DNS priority is used to prioritize
     * name servers based on the domain.  Queries for domains not present in any
     * search list are routed through connections having the '~.' special wildcard
     * domain, which is added automatically to connections with the default route
     * (or can be added manually).  When multiple connections specify the same domain, the
     * one with the best priority (lowest numerical value) wins.  If a sub domain
     * is configured on another interface it will be accepted regardless the priority,
     * unless parent domain on the other interface has a negative priority, which causes
     * the sub domain to be shadowed.
     * With Split DNS one can avoid undesired DNS leaks by properly configuring
     * DNS priorities and the search domains, so that only name servers of the desired
     * interface are configured.
     *
     * Since: 1.4
     **/
    obj_properties[PROP_DNS_PRIORITY] =
        g_param_spec_int(NM_SETTING_IP_CONFIG_DNS_PRIORITY,
                         "",
                         "",
                         G_MININT32,
                         G_MAXINT32,
                         0,
                         G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:addresses: (type GPtrArray(NMIPAddress))
     *
     * Array of IP addresses.
     **/
    obj_properties[PROP_ADDRESSES] =
        g_param_spec_boxed(NM_SETTING_IP_CONFIG_ADDRESSES,
                           "",
                           "",
                           G_TYPE_PTR_ARRAY,
                           /* "addresses" is a legacy D-Bus property, because the
                            * "addresses" GObject property normally gets set from
                            * the "address-data" D-Bus property...
                            */
                           G_PARAM_READWRITE | NM_SETTING_PARAM_INFERRABLE | NM_SETTING_PARAM_LEGACY
                               | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:gateway:
     *
     * The gateway associated with this configuration. This is only meaningful
     * if #NMSettingIPConfig:addresses is also set.
     *
     * The gateway's main purpose is to control the next hop of the standard default route on the device.
     * Hence, the gateway property conflicts with #NMSettingIPConfig:never-default and will be
     * automatically dropped if the IP configuration is set to never-default.
     *
     * As an alternative to set the gateway, configure a static default route with /0 as prefix
     * length.
     **/
    obj_properties[PROP_GATEWAY] = g_param_spec_string(
        NM_SETTING_IP_CONFIG_GATEWAY,
        "",
        "",
        NULL,
        G_PARAM_READWRITE | NM_SETTING_PARAM_INFERRABLE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:routes: (type GPtrArray(NMIPRoute))
     *
     * Array of IP routes.
     **/
    obj_properties[PROP_ROUTES] =
        g_param_spec_boxed(NM_SETTING_IP_CONFIG_ROUTES,
                           "",
                           "",
                           G_TYPE_PTR_ARRAY,
                           G_PARAM_READWRITE | NM_SETTING_PARAM_INFERRABLE |
                               /* See :addresses above Re: LEGACY */
                               NM_SETTING_PARAM_LEGACY | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:route-metric:
     *
     * The default metric for routes that don't explicitly specify a metric.
     * The default value -1 means that the metric is chosen automatically
     * based on the device type.
     * The metric applies to dynamic routes, manual (static) routes that
     * don't have an explicit metric setting, address prefix routes, and
     * the default route.
     * Note that for IPv6, the kernel accepts zero (0) but coerces it to
     * 1024 (user default). Hence, setting this property to zero effectively
     * mean setting it to 1024.
     * For IPv4, zero is a regular value for the metric.
     **/
    obj_properties[PROP_ROUTE_METRIC] =
        g_param_spec_int64(NM_SETTING_IP_CONFIG_ROUTE_METRIC,
                           "",
                           "",
                           -1,
                           G_MAXUINT32,
                           -1,
                           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:route-table:
     *
     * Enable policy routing (source routing) and set the routing table used when adding routes.
     *
     * This affects all routes, including device-routes, IPv4LL, DHCP, SLAAC, default-routes
     * and static routes. But note that static routes can individually overwrite the setting
     * by explicitly specifying a non-zero routing table.
     *
     * If the table setting is left at zero, it is eligible to be overwritten via global
     * configuration. If the property is zero even after applying the global configuration
     * value, policy routing is disabled for the address family of this connection.
     *
     * Policy routing disabled means that NetworkManager will add all routes to the main
     * table (except static routes that explicitly configure a different table). Additionally,
     * NetworkManager will not delete any extraneous routes from tables except the main table.
     * This is to preserve backward compatibility for users who manage routing tables outside
     * of NetworkManager.
     *
     * Since: 1.10
     **/
    obj_properties[PROP_ROUTE_TABLE] = g_param_spec_uint(
        NM_SETTING_IP_CONFIG_ROUTE_TABLE,
        "",
        "",
        0,
        G_MAXUINT32,
        0,
        G_PARAM_READWRITE | NM_SETTING_PARAM_FUZZY_IGNORE | G_PARAM_STATIC_STRINGS);
    /**
     * NMSettingIPConfig:ignore-auto-routes:
     *
     * When #NMSettingIPConfig:method is set to "auto" and this property to
     * %TRUE, automatically configured routes are ignored and only routes
     * specified in the #NMSettingIPConfig:routes property, if any, are used.
     **/
    obj_properties[PROP_IGNORE_AUTO_ROUTES] =
        g_param_spec_boolean(NM_SETTING_IP_CONFIG_IGNORE_AUTO_ROUTES,
                             "",
                             "",
                             FALSE,
                             G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:ignore-auto-dns:
     *
     * When #NMSettingIPConfig:method is set to "auto" and this property to
     * %TRUE, automatically configured name servers and search domains are
     * ignored and only name servers and search domains specified in the
     * #NMSettingIPConfig:dns and #NMSettingIPConfig:dns-search properties, if
     * any, are used.
     **/
    obj_properties[PROP_IGNORE_AUTO_DNS] =
        g_param_spec_boolean(NM_SETTING_IP_CONFIG_IGNORE_AUTO_DNS,
                             "",
                             "",
                             FALSE,
                             G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:dhcp-hostname:
     *
     * If the #NMSettingIPConfig:dhcp-send-hostname property is %TRUE, then the
     * specified name will be sent to the DHCP server when acquiring a lease.
     * This property and #NMSettingIP4Config:dhcp-fqdn are mutually exclusive and
     * cannot be set at the same time.
     **/
    obj_properties[PROP_DHCP_HOSTNAME] =
        g_param_spec_string(NM_SETTING_IP_CONFIG_DHCP_HOSTNAME,
                            "",
                            "",
                            NULL,
                            G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:dhcp-send-hostname:
     *
     * If %TRUE, a hostname is sent to the DHCP server when acquiring a lease.
     * Some DHCP servers use this hostname to update DNS databases, essentially
     * providing a static hostname for the computer.  If the
     * #NMSettingIPConfig:dhcp-hostname property is %NULL and this property is
     * %TRUE, the current persistent hostname of the computer is sent.
     **/
    obj_properties[PROP_DHCP_SEND_HOSTNAME] =
        g_param_spec_boolean(NM_SETTING_IP_CONFIG_DHCP_SEND_HOSTNAME,
                             "",
                             "",
                             TRUE,
                             G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:never-default:
     *
     * If %TRUE, this connection will never be the default connection for this
     * IP type, meaning it will never be assigned the default route by
     * NetworkManager.
     **/
    obj_properties[PROP_NEVER_DEFAULT] =
        g_param_spec_boolean(NM_SETTING_IP_CONFIG_NEVER_DEFAULT,
                             "",
                             "",
                             FALSE,
                             G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:may-fail:
     *
     * If %TRUE, allow overall network configuration to proceed even if the
     * configuration specified by this property times out.  Note that at least
     * one IP configuration must succeed or overall network configuration will
     * still fail.  For example, in IPv6-only networks, setting this property to
     * %TRUE on the #NMSettingIP4Config allows the overall network configuration
     * to succeed if IPv4 configuration fails but IPv6 configuration completes
     * successfully.
     **/
    obj_properties[PROP_MAY_FAIL] =
        g_param_spec_boolean(NM_SETTING_IP_CONFIG_MAY_FAIL,
                             "",
                             "",
                             TRUE,
                             G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:dad-timeout:
     *
     * Timeout in milliseconds used to check for the presence of duplicate IP
     * addresses on the network.  If an address conflict is detected, the
     * activation will fail.  A zero value means that no duplicate address
     * detection is performed, -1 means the default value (either configuration
     * ipvx.dad-timeout override or zero).  A value greater than zero is a
     * timeout in milliseconds.
     *
     * The property is currently implemented only for IPv4.
     *
     * Since: 1.2
     **/
    obj_properties[PROP_DAD_TIMEOUT] = g_param_spec_int(
        NM_SETTING_IP_CONFIG_DAD_TIMEOUT,
        "",
        "",
        -1,
        NM_SETTING_IP_CONFIG_DAD_TIMEOUT_MAX,
        -1,
        G_PARAM_READWRITE | NM_SETTING_PARAM_FUZZY_IGNORE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:dhcp-timeout:
     *
     * A timeout for a DHCP transaction in seconds. If zero (the default), a
     * globally configured default is used. If still unspecified, a device specific
     * timeout is used (usually 45 seconds).
     *
     * Set to 2147483647 (MAXINT32) for infinity.
     **/
    obj_properties[PROP_DHCP_TIMEOUT] = g_param_spec_int(
        NM_SETTING_IP_CONFIG_DHCP_TIMEOUT,
        "",
        "",
        0,
        G_MAXINT32,
        0,
        G_PARAM_READWRITE | NM_SETTING_PARAM_FUZZY_IGNORE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:required-timeout:
     *
     * The minimum time interval in milliseconds for which dynamic IP configuration
     * should be tried before the connection succeeds.
     *
     * This property is useful for example if both IPv4 and IPv6 are enabled and
     * are allowed to fail. Normally the connection succeeds as soon as one of
     * the two address families completes; by setting a required timeout for
     * e.g. IPv4, one can ensure that even if IP6 succeeds earlier than IPv4,
     * NetworkManager waits some time for IPv4 before the connection becomes
     * active.
     *
     * Note that if #NMSettingIPConfig:may-fail is FALSE for the same address
     * family, this property has no effect as NetworkManager needs to wait for
     * the full DHCP timeout.
     *
     * A zero value means that no required timeout is present, -1 means the
     * default value (either configuration ipvx.required-timeout override or
     * zero).
     *
     * Since: 1.34, 1.32.4
     **/
    obj_properties[PROP_REQUIRED_TIMEOUT] = g_param_spec_int(
        NM_SETTING_IP_CONFIG_REQUIRED_TIMEOUT,
        "",
        "",
        -1,
        G_MAXINT32,
        -1,
        G_PARAM_READWRITE | NM_SETTING_PARAM_FUZZY_IGNORE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:dhcp-iaid:
     *
     * A string containing the "Identity Association Identifier" (IAID) used
     * by the DHCP client. The property is a 32-bit decimal value or a
     * special value among "mac", "perm-mac", "ifname" and "stable". When
     * set to "mac" (or "perm-mac"), the last 4 bytes of the current (or
     * permanent) MAC address are used as IAID. When set to "ifname", the
     * IAID is computed by hashing the interface name. The special value
     * "stable" can be used to generate an IAID based on the stable-id (see
     * connection.stable-id), a per-host key and the interface name. When
     * the property is unset, the value from global configuration is used;
     * if no global default is set then the IAID is assumed to be
     * "ifname". Note that at the moment this property is ignored for IPv6
     * by dhclient, which always derives the IAID from the MAC address.
     *
     * Since: 1.22
     **/
    obj_properties[PROP_DHCP_IAID] =
        g_param_spec_string(NM_SETTING_IP_CONFIG_DHCP_IAID,
                            "",
                            "",
                            NULL,
                            G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:dhcp-hostname-flags:
     *
     * Flags for the DHCP hostname and FQDN.
     *
     * Currently, this property only includes flags to control the FQDN flags
     * set in the DHCP FQDN option. Supported FQDN flags are
     * %NM_DHCP_HOSTNAME_FLAG_FQDN_SERV_UPDATE,
     * %NM_DHCP_HOSTNAME_FLAG_FQDN_ENCODED and
     * %NM_DHCP_HOSTNAME_FLAG_FQDN_NO_UPDATE.  When no FQDN flag is set and
     * %NM_DHCP_HOSTNAME_FLAG_FQDN_CLEAR_FLAGS is set, the DHCP FQDN option will
     * contain no flag. Otherwise, if no FQDN flag is set and
     * %NM_DHCP_HOSTNAME_FLAG_FQDN_CLEAR_FLAGS is not set, the standard FQDN flags
     * are set in the request:
     * %NM_DHCP_HOSTNAME_FLAG_FQDN_SERV_UPDATE,
     * %NM_DHCP_HOSTNAME_FLAG_FQDN_ENCODED for IPv4 and
     * %NM_DHCP_HOSTNAME_FLAG_FQDN_SERV_UPDATE for IPv6.
     *
     * When this property is set to the default value %NM_DHCP_HOSTNAME_FLAG_NONE,
     * a global default is looked up in NetworkManager configuration. If that value
     * is unset or also %NM_DHCP_HOSTNAME_FLAG_NONE, then the standard FQDN flags
     * described above are sent in the DHCP requests.
     *
     * Since: 1.22
     */
    obj_properties[PROP_DHCP_HOSTNAME_FLAGS] =
        g_param_spec_uint(NM_SETTING_IP_CONFIG_DHCP_HOSTNAME_FLAGS,
                          "",
                          "",
                          0,
                          G_MAXUINT32,
                          NM_DHCP_HOSTNAME_FLAG_NONE,
                          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    /**
     * NMSettingIPConfig:dhcp-reject-servers:
     *
     * Array of servers from which DHCP offers must be rejected. This property
     * is useful to avoid getting a lease from misconfigured or rogue servers.
     *
     * For DHCPv4, each element must be an IPv4 address, optionally
     * followed by a slash and a prefix length (e.g. "192.168.122.0/24").
     *
     * This property is currently not implemented for DHCPv6.
     *
     * Since: 1.28
     **/
    obj_properties[PROP_DHCP_REJECT_SERVERS] =
        g_param_spec_boxed(NM_SETTING_IP_CONFIG_DHCP_REJECT_SERVERS,
                           "",
                           "",
                           G_TYPE_STRV,
                           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);

    g_object_class_install_properties(object_class, _PROPERTY_ENUMS_LAST, obj_properties);
}
