/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright (C) 2016 Red Hat, Inc.
 */

#include "nm-default.h"

#include <sched.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <linux/if_tun.h>

#include "nm-glib-aux/nm-io-utils.h"
#include "platform/nmp-object.h"
#include "platform/nmp-netns.h"
#include "platform/nm-platform-utils.h"

#include "test-common.h"
#include "nm-test-utils-core.h"

#define LO_INDEX    1
#define LO_NAME     "lo"
#define LO_TYPEDESC "loopback"

#define DUMMY_TYPEDESC "dummy"
#define BOGUS_NAME     "nm-bogus-device"
#define BOGUS_IFINDEX  INT_MAX
#define SLAVE_NAME     "nm-test-slave"
#define PARENT_NAME    "nm-test-parent"
#define VLAN_ID        4077
#define VLAN_FLAGS     0
#define MTU            1357

#define _ADD_DUMMY(platform, name) \
    g_assert(NMTST_NM_ERR_SUCCESS(nm_platform_link_dummy_add((platform), (name), NULL)))

static void
test_bogus(void)
{
    size_t addrlen;

    g_assert(!nm_platform_link_get_by_ifname(NM_PLATFORM_GET, BOGUS_NAME));
    g_assert(!nm_platform_link_delete(NM_PLATFORM_GET, BOGUS_IFINDEX));
    g_assert(!nm_platform_link_get_ifindex(NM_PLATFORM_GET, BOGUS_NAME));
    g_assert(!nm_platform_link_get_name(NM_PLATFORM_GET, BOGUS_IFINDEX));
    g_assert(!nm_platform_link_get_type(NM_PLATFORM_GET, BOGUS_IFINDEX));
    g_assert(!nm_platform_link_get_type_name(NM_PLATFORM_GET, BOGUS_IFINDEX));

    g_assert(!nm_platform_link_set_up(NM_PLATFORM_GET, BOGUS_IFINDEX, NULL));

    g_assert(!nm_platform_link_set_down(NM_PLATFORM_GET, BOGUS_IFINDEX));

    g_assert(!nm_platform_link_set_arp(NM_PLATFORM_GET, BOGUS_IFINDEX));

    g_assert(!nm_platform_link_set_noarp(NM_PLATFORM_GET, BOGUS_IFINDEX));

    g_assert(!nm_platform_link_is_up(NM_PLATFORM_GET, BOGUS_IFINDEX));
    g_assert(!nm_platform_link_is_connected(NM_PLATFORM_GET, BOGUS_IFINDEX));
    g_assert(!nm_platform_link_uses_arp(NM_PLATFORM_GET, BOGUS_IFINDEX));

    g_assert(!nm_platform_link_get_address(NM_PLATFORM_GET, BOGUS_IFINDEX, &addrlen));
    g_assert(!addrlen);
    g_assert(!nm_platform_link_get_address(NM_PLATFORM_GET, BOGUS_IFINDEX, NULL));

    g_assert(!NMTST_NM_ERR_SUCCESS(nm_platform_link_set_mtu(NM_PLATFORM_GET, BOGUS_IFINDEX, MTU)));

    g_assert(!nm_platform_link_get_mtu(NM_PLATFORM_GET, BOGUS_IFINDEX));

    g_assert(!nm_platform_link_supports_carrier_detect(NM_PLATFORM_GET, BOGUS_IFINDEX));
    g_assert(!nm_platform_link_supports_vlans(NM_PLATFORM_GET, BOGUS_IFINDEX));

    g_assert(!nm_platform_link_get_lnk_vlan(NM_PLATFORM_GET, BOGUS_IFINDEX, NULL));
    g_assert(!nm_platform_link_vlan_set_ingress_map(NM_PLATFORM_GET, BOGUS_IFINDEX, 0, 0));
    g_assert(!nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, BOGUS_IFINDEX, 0, 0));
}

static void
test_loopback(void)
{
    g_assert(nm_platform_link_get_by_ifname(NM_PLATFORM_GET, LO_NAME));
    g_assert_cmpint(nm_platform_link_get_type(NM_PLATFORM_GET, LO_INDEX),
                    ==,
                    NM_LINK_TYPE_LOOPBACK);
    g_assert_cmpint(nm_platform_link_get_ifindex(NM_PLATFORM_GET, LO_NAME), ==, LO_INDEX);
    g_assert_cmpstr(nm_platform_link_get_name(NM_PLATFORM_GET, LO_INDEX), ==, LO_NAME);
    g_assert_cmpstr(nm_platform_link_get_type_name(NM_PLATFORM_GET, LO_INDEX), ==, LO_TYPEDESC);

    g_assert(nm_platform_link_supports_carrier_detect(NM_PLATFORM_GET, LO_INDEX));
    g_assert(!nm_platform_link_supports_vlans(NM_PLATFORM_GET, LO_INDEX));
}

static gboolean
software_add(NMLinkType link_type, const char *name)
{
    switch (link_type) {
    case NM_LINK_TYPE_DUMMY:
        return NMTST_NM_ERR_SUCCESS(nm_platform_link_dummy_add(NM_PLATFORM_GET, name, NULL));
    case NM_LINK_TYPE_BRIDGE:
        return NMTST_NM_ERR_SUCCESS(nm_platform_link_bridge_add(NM_PLATFORM_GET,
                                                                name,
                                                                NULL,
                                                                0,
                                                                0,
                                                                &nm_platform_lnk_bridge_default,
                                                                NULL));
    case NM_LINK_TYPE_BOND:
    {
        gboolean bond0_exists = !!nm_platform_link_get_by_ifname(NM_PLATFORM_GET, "bond0");
        int      r;

        r = nm_platform_link_bond_add(NM_PLATFORM_GET, name, NULL);

        /* Check that bond0 is *not* automatically created. */
        if (!bond0_exists)
            g_assert(!nm_platform_link_get_by_ifname(NM_PLATFORM_GET, "bond0"));
        return r >= 0;
    }
    case NM_LINK_TYPE_TEAM:
        return NMTST_NM_ERR_SUCCESS(nm_platform_link_team_add(NM_PLATFORM_GET, name, NULL));
    case NM_LINK_TYPE_VLAN:
    {
        SignalData *parent_added;
        SignalData *parent_changed;

        /* Don't call link_callback for the bridge interface */
        parent_added = add_signal_ifname(NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                         NM_PLATFORM_SIGNAL_ADDED,
                                         link_callback,
                                         PARENT_NAME);
        if (NMTST_NM_ERR_SUCCESS(nm_platform_link_bridge_add(NM_PLATFORM_GET,
                                                             PARENT_NAME,
                                                             NULL,
                                                             0,
                                                             0,
                                                             &nm_platform_lnk_bridge_default,
                                                             NULL)))
            accept_signal(parent_added);
        free_signal(parent_added);

        {
            int      parent_ifindex = nm_platform_link_get_ifindex(NM_PLATFORM_GET, PARENT_NAME);
            gboolean was_up         = nm_platform_link_is_up(NM_PLATFORM_GET, parent_ifindex);

            parent_changed = add_signal_ifindex(NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                                NM_PLATFORM_SIGNAL_CHANGED,
                                                link_callback,
                                                parent_ifindex);
            g_assert(nm_platform_link_set_up(NM_PLATFORM_GET, parent_ifindex, NULL));
            if (was_up) {
                /* when NM is running in the background, it will mess with addrgenmode which might cause additional signals. */
                accept_signals(parent_changed, 0, 1);
            } else
                accept_signals(parent_changed, 1, 2);
            free_signal(parent_changed);

            return NMTST_NM_ERR_SUCCESS(
                nm_platform_link_vlan_add(NM_PLATFORM_GET, name, parent_ifindex, VLAN_ID, 0, NULL));
        }
    }
    default:
        g_error("Link type %d unhandled.", link_type);
    }
    g_assert_not_reached();
}

static void
test_link_changed_signal_cb(NMPlatform *              platform,
                            int                       obj_type_i,
                            int                       ifindex,
                            const NMPlatformIP4Route *route,
                            int                       change_type_i,
                            gboolean *                p_test_link_changed_signal_arg)
{
    const NMPObjectType              obj_type    = obj_type_i;
    const NMPlatformSignalChangeType change_type = change_type_i;

    /* test invocation of platform signals with multiple listeners
     * connected to the signal. Platform signals have enum-typed
     * arguments and there seem to be an issue with invoking such
     * signals on s390x and ppc64 archs.
     * https://bugzilla.redhat.com/show_bug.cgi?id=1260577
     *
     * As the test shows, the failure is not reproducible for
     * platform signals.
     */
    g_assert(NM_IS_PLATFORM(platform));
    g_assert(platform == NM_PLATFORM_GET);

    g_assert(ifindex > 0);
    g_assert(route);

    g_assert_cmpint(obj_type, ==, NMP_OBJECT_TYPE_LINK);

    g_assert_cmpint((gint64) change_type, !=, (gint64) 0);
    g_assert_cmpint(change_type, !=, NM_PLATFORM_SIGNAL_NONE);

    *p_test_link_changed_signal_arg = TRUE;
}

static void
test_slave(int master, int type, SignalData *master_changed)
{
    int         ifindex;
    SignalData *link_added = add_signal_ifname(NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                               NM_PLATFORM_SIGNAL_ADDED,
                                               link_callback,
                                               SLAVE_NAME);
    SignalData *link_changed, *link_removed;
    char *      value;
    NMLinkType  link_type = nm_platform_link_get_type(NM_PLATFORM_GET, master);
    gboolean    test_link_changed_signal_arg1;
    gboolean    test_link_changed_signal_arg2;

    g_assert(NM_IN_SET(link_type, NM_LINK_TYPE_TEAM, NM_LINK_TYPE_BOND, NM_LINK_TYPE_BRIDGE));

    g_assert(software_add(type, SLAVE_NAME));
    ifindex = nm_platform_link_get_ifindex(NM_PLATFORM_GET, SLAVE_NAME);
    g_assert(ifindex > 0);
    link_changed = add_signal_ifindex(NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                      NM_PLATFORM_SIGNAL_CHANGED,
                                      link_callback,
                                      ifindex);
    link_removed = add_signal_ifindex(NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                      NM_PLATFORM_SIGNAL_REMOVED,
                                      link_callback,
                                      ifindex);
    accept_signal(link_added);

    /* Set the slave up to see whether master's IFF_LOWER_UP is set correctly.
     *
     * See https://bugzilla.redhat.com/show_bug.cgi?id=910348
     */
    g_assert(!nm_platform_link_is_up(NM_PLATFORM_GET, ifindex));
    g_assert(nm_platform_link_set_down(NM_PLATFORM_GET, ifindex));
    g_assert(!nm_platform_link_is_up(NM_PLATFORM_GET, ifindex));
    ensure_no_signal(link_changed);

    /* Enslave */
    link_changed->ifindex = ifindex;
    g_assert(nm_platform_link_enslave(NM_PLATFORM_GET, master, ifindex));
    g_assert_cmpint(nm_platform_link_get_master(NM_PLATFORM_GET, ifindex), ==, master);

    accept_signals(link_changed, 1, 3);
    accept_signals(master_changed, 0, 2);

    /* enslaveing brings put the slave */
    if (NM_IN_SET(link_type, NM_LINK_TYPE_BOND, NM_LINK_TYPE_TEAM))
        g_assert(nm_platform_link_is_up(NM_PLATFORM_GET, ifindex));
    else
        g_assert(!nm_platform_link_is_up(NM_PLATFORM_GET, ifindex));

    test_link_changed_signal_arg1 = FALSE;
    test_link_changed_signal_arg2 = FALSE;
    g_signal_connect(NM_PLATFORM_GET,
                     NM_PLATFORM_SIGNAL_LINK_CHANGED,
                     G_CALLBACK(test_link_changed_signal_cb),
                     &test_link_changed_signal_arg1);
    g_signal_connect(NM_PLATFORM_GET,
                     NM_PLATFORM_SIGNAL_LINK_CHANGED,
                     G_CALLBACK(test_link_changed_signal_cb),
                     &test_link_changed_signal_arg2);

    /* Set master up */
    g_assert(nm_platform_link_set_up(NM_PLATFORM_GET, master, NULL));
    g_assert(nm_platform_link_is_up(NM_PLATFORM_GET, master));
    accept_signals(master_changed, 1, 3);

    g_signal_handlers_disconnect_by_func(NM_PLATFORM_GET,
                                         G_CALLBACK(test_link_changed_signal_cb),
                                         &test_link_changed_signal_arg1);
    g_signal_handlers_disconnect_by_func(NM_PLATFORM_GET,
                                         G_CALLBACK(test_link_changed_signal_cb),
                                         &test_link_changed_signal_arg2);
    g_assert(test_link_changed_signal_arg1);
    g_assert(test_link_changed_signal_arg2);

    /* Master with a disconnected slave is disconnected
     *
     * For some reason, bonding and teaming slaves are automatically set up. We
     * need to set them back down for this test.
     */
    switch (nm_platform_link_get_type(NM_PLATFORM_GET, master)) {
    case NM_LINK_TYPE_BOND:
    case NM_LINK_TYPE_TEAM:
        g_assert(nm_platform_link_set_down(NM_PLATFORM_GET, ifindex));
        accept_signal(link_changed);
        accept_signals(master_changed, 0, 3);
        break;
    default:
        break;
    }
    g_assert(!nm_platform_link_is_up(NM_PLATFORM_GET, ifindex));
    g_assert(!nm_platform_link_is_connected(NM_PLATFORM_GET, ifindex));
    if (nmtstp_is_root_test() && nm_platform_link_is_connected(NM_PLATFORM_GET, master)) {
        if (nm_platform_link_get_type(NM_PLATFORM_GET, master) == NM_LINK_TYPE_TEAM) {
            /* Older team versions (e.g. Fedora 17) have a bug that team master stays
             * IFF_LOWER_UP even if its slave is down. Double check it with iproute2 and if
             * `ip link` also claims master to be up, accept it. */
            char *stdout_str = NULL;

            nmtst_spawn_sync(NULL,
                             &stdout_str,
                             NULL,
                             0,
                             "/sbin/ip",
                             "link",
                             "show",
                             "dev",
                             nm_platform_link_get_name(NM_PLATFORM_GET, master));

            g_assert(strstr(stdout_str, "LOWER_UP"));
            g_free(stdout_str);
        } else
            g_assert_not_reached();
    }

    /* Set slave up and see if master gets up too */
    g_assert(nm_platform_link_set_up(NM_PLATFORM_GET, ifindex, NULL));
    g_assert(nm_platform_link_is_connected(NM_PLATFORM_GET, ifindex));
    g_assert(nm_platform_link_is_connected(NM_PLATFORM_GET, master));
    accept_signals(link_changed, 1, 3);
    /* NM running, can cause additional change of addrgenmode */
    accept_signals(master_changed, 0, 3);

    /* Enslave again
     *
     * Gracefully succeed if already enslaved.
     */
    ensure_no_signal(link_changed);
    g_assert(nm_platform_link_enslave(NM_PLATFORM_GET, master, ifindex));
    accept_signals(link_changed, 0, 2);
    accept_signals(master_changed, 0, 2);

    /* Set slave option */
    switch (type) {
    case NM_LINK_TYPE_BRIDGE:
        if (nmtstp_is_sysfs_writable()) {
            g_assert(
                nm_platform_sysctl_slave_set_option(NM_PLATFORM_GET, ifindex, "priority", "614"));
            value = nm_platform_sysctl_slave_get_option(NM_PLATFORM_GET, ifindex, "priority");
            g_assert_cmpstr(value, ==, "614");
            g_free(value);
        }
        break;
    default:
        break;
    }

    /* Release */
    ensure_no_signal(link_added);
    ensure_no_signal(link_changed);
    ensure_no_signal(link_removed);
    g_assert(nm_platform_link_release(NM_PLATFORM_GET, master, ifindex));
    g_assert_cmpint(nm_platform_link_get_master(NM_PLATFORM_GET, ifindex), ==, 0);
    if (link_changed->received_count > 0) {
        accept_signals(link_added, 0, 1);
        accept_signals(link_changed, 1, 5);
        accept_signals(link_removed, 0, 1);
    } else {
        /* Due to https://bugzilla.redhat.com/show_bug.cgi?id=1285719 , kernel might send a
         * wrong RTM_DELLINK message so that we instead see an removed+added signal. */
        accept_signal(link_added);
        ensure_no_signal(link_changed);
        accept_signal(link_removed);
    }
    accept_signals(master_changed, 0, 3);

    ensure_no_signal(master_changed);

    /* Release again */
    ensure_no_signal(link_changed);
    g_assert(!nm_platform_link_release(NM_PLATFORM_GET, master, ifindex));

    ensure_no_signal(master_changed);

    /* Remove */
    ensure_no_signal(link_added);
    ensure_no_signal(link_changed);
    ensure_no_signal(link_removed);
    nmtstp_link_delete(NULL, -1, ifindex, NULL, TRUE);
    accept_signals(master_changed, 0, 1);
    accept_signals(link_changed, 0, 1);
    accept_signal(link_removed);

    free_signal(link_added);
    free_signal(link_changed);
    free_signal(link_removed);
}

static void
test_software(NMLinkType link_type, const char *link_typename)
{
    int   ifindex;
    char *value;
    int   vlan_parent = -1, vlan_id;

    SignalData *link_added, *link_changed, *link_removed;

    /* Add */
    link_added = add_signal_ifname(NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                   NM_PLATFORM_SIGNAL_ADDED,
                                   link_callback,
                                   DEVICE_NAME);
    g_assert(software_add(link_type, DEVICE_NAME));
    accept_signal(link_added);
    g_assert(nm_platform_link_get_by_ifname(NM_PLATFORM_GET, DEVICE_NAME));
    ifindex = nm_platform_link_get_ifindex(NM_PLATFORM_GET, DEVICE_NAME);
    g_assert(ifindex >= 0);
    g_assert_cmpint(nm_platform_link_get_type(NM_PLATFORM_GET, ifindex), ==, link_type);
    g_assert_cmpstr(nm_platform_link_get_type_name(NM_PLATFORM_GET, ifindex), ==, link_typename);
    link_changed = add_signal_ifindex(NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                      NM_PLATFORM_SIGNAL_CHANGED,
                                      link_callback,
                                      ifindex);
    link_removed = add_signal_ifindex(NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                      NM_PLATFORM_SIGNAL_REMOVED,
                                      link_callback,
                                      ifindex);
    if (link_type == NM_LINK_TYPE_VLAN) {
        const NMPlatformLink *   plink;
        const NMPlatformLnkVlan *plnk;

        plnk = nm_platform_link_get_lnk_vlan(NM_PLATFORM_GET, ifindex, &plink);
        g_assert(plnk);
        g_assert(plink);

        vlan_parent = plink->parent;
        vlan_id     = plnk->id;
        g_assert_cmpint(vlan_parent,
                        ==,
                        nm_platform_link_get_ifindex(NM_PLATFORM_GET, PARENT_NAME));
        g_assert_cmpint(vlan_id, ==, VLAN_ID);
    }

    /* Add again */
    g_assert(!software_add(link_type, DEVICE_NAME));

    /* Set ARP/NOARP */
    g_assert(nm_platform_link_uses_arp(NM_PLATFORM_GET, ifindex));
    g_assert(nm_platform_link_set_noarp(NM_PLATFORM_GET, ifindex));
    g_assert(!nm_platform_link_uses_arp(NM_PLATFORM_GET, ifindex));
    accept_signals(link_changed, 1, 2);
    g_assert(nm_platform_link_set_arp(NM_PLATFORM_GET, ifindex));
    g_assert(nm_platform_link_uses_arp(NM_PLATFORM_GET, ifindex));
    accept_signal(link_changed);

    /* Set master option */
    if (nmtstp_is_root_test()) {
        switch (link_type) {
        case NM_LINK_TYPE_BRIDGE:
            if (nmtstp_is_sysfs_writable()) {
                g_assert(nm_platform_sysctl_master_set_option(NM_PLATFORM_GET,
                                                              ifindex,
                                                              "forward_delay",
                                                              "628"));
                value =
                    nm_platform_sysctl_master_get_option(NM_PLATFORM_GET, ifindex, "forward_delay");
                g_assert_cmpstr(value, ==, "628");
                g_free(value);
            }
            break;
        case NM_LINK_TYPE_BOND:
            if (nmtstp_is_sysfs_writable()) {
                g_assert(nm_platform_sysctl_master_set_option(NM_PLATFORM_GET,
                                                              ifindex,
                                                              "mode",
                                                              "active-backup"));
                value = nm_platform_sysctl_master_get_option(NM_PLATFORM_GET, ifindex, "mode");
                /* When reading back, the output looks slightly different. */
                g_assert(g_str_has_prefix(value, "active-backup"));
                g_free(value);
            }
            break;
        default:
            break;
        }
    }

    /* Enslave and release */
    switch (link_type) {
    case NM_LINK_TYPE_BRIDGE:
    case NM_LINK_TYPE_BOND:
    case NM_LINK_TYPE_TEAM:
        link_changed->ifindex = ifindex;
        test_slave(ifindex, NM_LINK_TYPE_DUMMY, link_changed);
        link_changed->ifindex = 0;
        break;
    default:
        break;
    }
    free_signal(link_changed);

    /* Delete */
    nmtstp_link_delete(NULL, -1, ifindex, DEVICE_NAME, TRUE);
    accept_signal(link_removed);

    /* Delete again */
    g_assert(nm_platform_link_get_ifindex(NM_PLATFORM_GET, DEVICE_NAME) <= 0);
    g_assert(!nm_platform_link_delete(NM_PLATFORM_GET, ifindex));

    /* VLAN: Delete parent */
    if (link_type == NM_LINK_TYPE_VLAN) {
        SignalData *link_removed_parent = add_signal_ifindex(NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                                             NM_PLATFORM_SIGNAL_REMOVED,
                                                             link_callback,
                                                             vlan_parent);

        nmtstp_link_delete(NULL, -1, vlan_parent, NULL, TRUE);
        accept_signal(link_removed_parent);
        free_signal(link_removed_parent);
    }

    /* No pending signal */
    free_signal(link_added);
    free_signal(link_removed);
}

static void
test_bridge(void)
{
    test_software(NM_LINK_TYPE_BRIDGE, "bridge");
}

static int
_system(const char *cmd)
{
    /* some gcc version really want to warn on -Werror=unused-result. Add a bogus wrapper
     * function. */
    return system(cmd);
}

static void
test_bond(void)
{
    if (nmtstp_is_root_test() && !g_file_test("/proc/1/net/bonding", G_FILE_TEST_IS_DIR)
        && _system("modprobe --show bonding") != 0) {
        g_test_skip("Skipping test for bonding: bonding module not available");
        return;
    }

    test_software(NM_LINK_TYPE_BOND, "bond");
}

static void
test_team(void)
{
    int r;

    if (nmtstp_is_root_test()) {
        r = nm_platform_link_team_add(NM_PLATFORM_GET, "nm-team-check", NULL);

        if (r < 0) {
            g_assert_cmpint(r, ==, -EOPNOTSUPP);
            g_test_skip("Skipping test for teaming: team module not functioning");
            return;
        }

        nmtstp_link_delete(NM_PLATFORM_GET, -1, -1, "nm-team-check", FALSE);
    }

    test_software(NM_LINK_TYPE_TEAM, "team");
}

static void
test_vlan(void)
{
    test_software(NM_LINK_TYPE_VLAN, "vlan");
}

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

static void
test_bridge_addr(void)
{
    char                  addr[ETH_ALEN];
    NMPlatformLink        link;
    const NMPlatformLink *plink = NULL;

    nm_utils_hwaddr_aton("de:ad:be:ef:00:11", addr, sizeof(addr));

    g_assert(NMTST_NM_ERR_SUCCESS(nm_platform_link_bridge_add(NM_PLATFORM_GET,
                                                              DEVICE_NAME,
                                                              addr,
                                                              sizeof(addr),
                                                              0,
                                                              &nm_platform_lnk_bridge_default,
                                                              &plink)));
    g_assert(plink);
    link = *plink;
    g_assert_cmpstr(link.name, ==, DEVICE_NAME);

    g_assert_cmpint(link.l_address.len, ==, sizeof(addr));
    g_assert(!memcmp(link.l_address.data, addr, sizeof(addr)));

    plink = nm_platform_link_get(NM_PLATFORM_GET, link.ifindex);
    g_assert(plink);

    if (nm_platform_kernel_support_get(NM_PLATFORM_KERNEL_SUPPORT_TYPE_USER_IPV6LL)) {
        g_assert(!nm_platform_link_get_user_ipv6ll_enabled(NM_PLATFORM_GET, link.ifindex));
        g_assert_cmpint(_nm_platform_uint8_inv(plink->inet6_addr_gen_mode_inv),
                        ==,
                        NM_IN6_ADDR_GEN_MODE_EUI64);

        g_assert(NMTST_NM_ERR_SUCCESS(
            nm_platform_link_set_user_ipv6ll_enabled(NM_PLATFORM_GET, link.ifindex, TRUE)));
        g_assert(nm_platform_link_get_user_ipv6ll_enabled(NM_PLATFORM_GET, link.ifindex));
        plink = nm_platform_link_get(NM_PLATFORM_GET, link.ifindex);
        g_assert(plink);
        g_assert_cmpint(_nm_platform_uint8_inv(plink->inet6_addr_gen_mode_inv),
                        ==,
                        NM_IN6_ADDR_GEN_MODE_NONE);

        g_assert(NMTST_NM_ERR_SUCCESS(
            nm_platform_link_set_user_ipv6ll_enabled(NM_PLATFORM_GET, link.ifindex, FALSE)));
        g_assert(!nm_platform_link_get_user_ipv6ll_enabled(NM_PLATFORM_GET, link.ifindex));
        plink = nm_platform_link_get(NM_PLATFORM_GET, link.ifindex);
        g_assert(plink);
        g_assert_cmpint(_nm_platform_uint8_inv(plink->inet6_addr_gen_mode_inv),
                        ==,
                        NM_IN6_ADDR_GEN_MODE_EUI64);
    }

    g_assert_cmpint(plink->l_address.len, ==, sizeof(addr));
    g_assert(!memcmp(plink->l_address.data, addr, sizeof(addr)));

    nmtstp_link_delete(NULL, -1, link.ifindex, link.name, TRUE);
}

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

static void
test_internal(void)
{
    SignalData *link_added = add_signal_ifname(NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                               NM_PLATFORM_SIGNAL_ADDED,
                                               link_callback,
                                               DEVICE_NAME);
    SignalData *link_changed, *link_removed;
    const char  mac[6] = {0x00, 0xff, 0x11, 0xee, 0x22, 0xdd};
    const char *address;
    size_t      addrlen;
    int         ifindex;

    /* Check the functions for non-existent devices */
    g_assert(!nm_platform_link_get_by_ifname(NM_PLATFORM_GET, DEVICE_NAME));
    g_assert(!nm_platform_link_get_ifindex(NM_PLATFORM_GET, DEVICE_NAME));

    /* Add device */
    g_assert(NMTST_NM_ERR_SUCCESS(nm_platform_link_dummy_add(NM_PLATFORM_GET, DEVICE_NAME, NULL)));
    accept_signal(link_added);

    /* Try to add again */
    g_assert(nm_platform_link_dummy_add(NM_PLATFORM_GET, DEVICE_NAME, NULL) == -NME_PL_EXISTS);

    /* Check device index, name and type */
    ifindex = nm_platform_link_get_ifindex(NM_PLATFORM_GET, DEVICE_NAME);
    g_assert(ifindex > 0);
    g_assert_cmpstr(nm_platform_link_get_name(NM_PLATFORM_GET, ifindex), ==, DEVICE_NAME);
    g_assert_cmpint(nm_platform_link_get_type(NM_PLATFORM_GET, ifindex), ==, NM_LINK_TYPE_DUMMY);
    g_assert_cmpstr(nm_platform_link_get_type_name(NM_PLATFORM_GET, ifindex), ==, DUMMY_TYPEDESC);
    link_changed = add_signal_ifindex(NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                      NM_PLATFORM_SIGNAL_CHANGED,
                                      link_callback,
                                      ifindex);
    link_removed = add_signal_ifindex(NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                      NM_PLATFORM_SIGNAL_REMOVED,
                                      link_callback,
                                      ifindex);

    /* Up/connected */
    g_assert(!nm_platform_link_is_up(NM_PLATFORM_GET, ifindex));
    g_assert(!nm_platform_link_is_connected(NM_PLATFORM_GET, ifindex));
    g_assert(nm_platform_link_set_up(NM_PLATFORM_GET, ifindex, NULL));
    g_assert(nm_platform_link_is_up(NM_PLATFORM_GET, ifindex));
    g_assert(nm_platform_link_is_connected(NM_PLATFORM_GET, ifindex));
    accept_signals(link_changed, 1, 2);
    g_assert(nm_platform_link_set_down(NM_PLATFORM_GET, ifindex));
    g_assert(!nm_platform_link_is_up(NM_PLATFORM_GET, ifindex));
    g_assert(!nm_platform_link_is_connected(NM_PLATFORM_GET, ifindex));
    accept_signal(link_changed);

    /* arp/noarp */
    g_assert(!nm_platform_link_uses_arp(NM_PLATFORM_GET, ifindex));
    g_assert(nm_platform_link_set_arp(NM_PLATFORM_GET, ifindex));
    g_assert(nm_platform_link_uses_arp(NM_PLATFORM_GET, ifindex));
    accept_signal(link_changed);
    g_assert(nm_platform_link_set_noarp(NM_PLATFORM_GET, ifindex));
    g_assert(!nm_platform_link_uses_arp(NM_PLATFORM_GET, ifindex));
    accept_signal(link_changed);

    /* Features */
    g_assert(!nm_platform_link_supports_carrier_detect(NM_PLATFORM_GET, ifindex));
    g_assert(nm_platform_link_supports_vlans(NM_PLATFORM_GET, ifindex));

    /* Set MAC address */
    g_assert(NMTST_NM_ERR_SUCCESS(
        nm_platform_link_set_address(NM_PLATFORM_GET, ifindex, mac, sizeof(mac))));
    address = nm_platform_link_get_address(NM_PLATFORM_GET, ifindex, &addrlen);
    g_assert(addrlen == sizeof(mac));
    g_assert(!memcmp(address, mac, addrlen));
    address = nm_platform_link_get_address(NM_PLATFORM_GET, ifindex, NULL);
    g_assert(!memcmp(address, mac, addrlen));
    accept_signal(link_changed);

    /* Set MTU */
    g_assert(NMTST_NM_ERR_SUCCESS(nm_platform_link_set_mtu(NM_PLATFORM_GET, ifindex, MTU)));
    g_assert_cmpint(nm_platform_link_get_mtu(NM_PLATFORM_GET, ifindex), ==, MTU);
    accept_signal(link_changed);

    /* Delete device */
    nmtstp_link_delete(NULL, -1, ifindex, DEVICE_NAME, TRUE);
    accept_signal(link_removed);

    /* Try to delete again */
    g_assert(!nm_platform_link_delete(NM_PLATFORM_GET, ifindex));

    free_signal(link_added);
    free_signal(link_changed);
    free_signal(link_removed);
}

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

static void
test_external(void)
{
    const NMPlatformLink *pllink;
    SignalData *          link_added, *link_changed, *link_removed;
    int                   ifindex;

    link_added = add_signal_ifname(NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                   NM_PLATFORM_SIGNAL_ADDED,
                                   link_callback,
                                   DEVICE_NAME);

    nmtstp_run_command_check("ip link add %s type %s", DEVICE_NAME, "dummy");
    wait_signal(link_added);

    g_assert(nm_platform_link_get_by_ifname(NM_PLATFORM_GET, DEVICE_NAME));
    ifindex = nm_platform_link_get_ifindex(NM_PLATFORM_GET, DEVICE_NAME);
    g_assert(ifindex > 0);
    g_assert_cmpstr(nm_platform_link_get_name(NM_PLATFORM_GET, ifindex), ==, DEVICE_NAME);
    g_assert_cmpint(nm_platform_link_get_type(NM_PLATFORM_GET, ifindex), ==, NM_LINK_TYPE_DUMMY);
    g_assert_cmpstr(nm_platform_link_get_type_name(NM_PLATFORM_GET, ifindex), ==, DUMMY_TYPEDESC);
    link_changed = add_signal_ifindex(NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                      NM_PLATFORM_SIGNAL_CHANGED,
                                      link_callback,
                                      ifindex);
    link_removed = add_signal_ifindex(NM_PLATFORM_SIGNAL_LINK_CHANGED,
                                      NM_PLATFORM_SIGNAL_REMOVED,
                                      link_callback,
                                      ifindex);

    pllink = nm_platform_link_get(NM_PLATFORM_GET, ifindex);
    g_assert(pllink);
    if (!pllink->initialized) {
        /* we still lack the notification via UDEV. Expect another link changed signal. */
        wait_signal(link_changed);
    }

    /* Up/connected/arp */
    g_assert(!nm_platform_link_is_up(NM_PLATFORM_GET, ifindex));
    g_assert(!nm_platform_link_is_connected(NM_PLATFORM_GET, ifindex));
    g_assert(!nm_platform_link_uses_arp(NM_PLATFORM_GET, ifindex));

    nmtstp_run_command_check("ip link set %s up", DEVICE_NAME);
    wait_signal(link_changed);

    g_assert(nm_platform_link_is_up(NM_PLATFORM_GET, ifindex));
    g_assert(nm_platform_link_is_connected(NM_PLATFORM_GET, ifindex));
    nmtstp_run_command_check("ip link set %s down", DEVICE_NAME);
    wait_signal(link_changed);
    g_assert(!nm_platform_link_is_up(NM_PLATFORM_GET, ifindex));
    g_assert(!nm_platform_link_is_connected(NM_PLATFORM_GET, ifindex));

    nmtstp_run_command_check("ip link set %s arp on", DEVICE_NAME);
    wait_signal(link_changed);
    g_assert(nm_platform_link_uses_arp(NM_PLATFORM_GET, ifindex));
    nmtstp_run_command_check("ip link set %s arp off", DEVICE_NAME);
    wait_signal(link_changed);
    g_assert(!nm_platform_link_uses_arp(NM_PLATFORM_GET, ifindex));

    nmtstp_run_command_check("ip link del %s", DEVICE_NAME);
    wait_signal(link_removed);
    accept_signals(link_changed, 0, 1);
    g_assert(!nm_platform_link_get_by_ifname(NM_PLATFORM_GET, DEVICE_NAME));

    free_signal(link_added);
    free_signal(link_changed);
    free_signal(link_removed);
}

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

static guint8 *
_copy_base64(guint8 *dst, gsize dst_len, const char *base64_src)
{
    g_assert(dst);
    g_assert(dst_len > 0);

    if (!base64_src)
        memset(dst, 0, dst_len);
    else {
        gs_free guint8 *b = NULL;
        gsize           l;

        b = g_base64_decode(base64_src, &l);
        g_assert(b);
        g_assert(l == dst_len);

        memcpy(dst, b, dst_len);
    }
    return dst;
}

typedef struct {
    const char *pri;
    const char *pub;
    const char *pre;
} KeyPair;

static void
_test_wireguard_change(NMPlatform *platform, int ifindex, int test_mode)
{
    const KeyPair self_key  = {"yOWEsaXFxX9/DOkQPzqB9RufZOpfSP4LZZCErP0N0Xo=",
                              "s6pVT2xPwktor9O5bVOSzcPqBu9uzQOUzPQHXLU2jmk="};
    const KeyPair keys[100] = {
        {"+BDHMh11bkheGfvlQpqt8P/H7N1sPXtVi05XraZS0E8=",
         "QItu7PJadBVXFXGv55CMtVnbRHdrI6E2CGlu2N5oGx4=",
         "2IvZnKTzbF1UlChznWSsEYtGbPjhYSTT41GXO6zLxvk="},
        {"qGZyV2BO1nyY/FGYd6elBPirwJC9QyZwqbm2OJAgLkY=",
         "v8L1FEitO0xo+wW/CVVUnALlw0zGveApSFdlITi/5lI=",
         "/R2c0JmBNGJzT594NQ0mBJ2XJjxt2QUSo+ZiqeY0EQA="},
        {"YDgsIb0oe+9NcxIx2r0HEEPQpRMxmRN0ALoLm9Sh40Q=",
         "nFPs1HaU7uFBvE9xZCMF8oOAjzLpZ49AzDHOluY1O2E=",
         "zsYED2Ef7zIHJoRBPcen+w4ktrRsLPEfYwZhWIuXfds="},
        {"kHkosM503LWu43tdYXbNwVOpRrtPgd9XFqcN7k4t6G4=",
         "b8e092WT+eNmnxCr5WE2QC/MXAjDagfG1g03cs2mBC0=",
         "VXz0ShGWT7H0CBCg2awfatmOJF15ZtaSMPhMsp+hc3A="},
        {"4C2w5CEnxH59Y2aa6CJXgLdDtWoNMS2UJounRCM1Jkk=",
         "gC/R9umlnEQL+Qsz/Y64AlsdMge4ECe5/u/JHZCMWSs=",
         "2bmL5ISr+V5a7l7xFJ695BLIJyBgx8xnxzybkxiRHOg="},
        {"KHJSzFGkXcZf/wbH2rr99SYtGKWbL680wA2AcDE94lo=",
         "BsN23h4aOi458Q3EgMQsodsWQxd9h/RxqskAUpsXfgg=",
         "nK4Zv34YKEhjuexhq1SgK4oTd4MZJT5gcpYvEuPjc7Q="},
        {"QGMulXJ9e3AVxtpi8+UUVqPOr/YBWvCNFVsWS9IUnUA=",
         "kjVclP5Ifi6og2BBCEHKS/aa/WktArB4+ig06lYaVlg=",
         "0+mmceDPcSRK3vFnYqHd9iAfY+Nyjzf/1KgDeYGlRkQ="},
        {"AOJiDD4y6GA7P7gugjjQG9Cctvc5Y27fajHz6aU3gU4=",
         "gEnHn6euHtcMEwZBlX6HANPeN9Of+voBDtltS38xDUw=",
         "wIH1OxgX6GLxx/bnR+t3fbmjGZDTU3WMxp7t1XGezqM="},
        {"COsls2BlCltaIrrq1+FU51cWddlmoPPppSeIDunOxGA=",
         "+n6WuV8Tb1/iZArTrHsyNqkRHABbavBQt9Me72K2KEc=",
         "t4baiprSO9ZbKD2/RutOY9cr+yCajQWZGCTnQdrFQj0="},
        {"uHawQq2BRyJlsTPoCa+MfBVnv4MwtRoS+S9FEpFOEVg=",
         "8lcmr27afeb6iI3BQCaDtvalF2Cl7gxRZgs+nyJ/fEg=",
         "Eh9o/6W60iujBLIHuRfNrPhOWAn7PambT2JRln9iwA0="},
        {"yL7hmoE/JfRGAotRzx9xOpjfrDA3BFlPEemFiQw40Wk=",
         "BHK0PHi5kp7rOfQ46oc9xlVpB+pZeZYXTtH7EXr5TwU=",
         "BS2h2ZZyW0BlYMmLR29xyHEcZ4jtO7rgj1jkz/EEaxU="},
        {"ON8YrTHQgoC5e0mAR9FakZ8hZ/9I7ysuE21sG546J1Y=",
         "Bm3l5I6iH1tDrv6EgdZU9PzHqp0H26Z6ggmmIypwxy8=",
         "qKVfbCnK1EI3eC28SsL+jyBnEnIF/nRJQJzDevBFdNQ="},
        {"KGLO0RI0VlQFCG+ETUqk25HdaKUnUPXKOKkTh/w8BXU=",
         "sBDBwQFC7k8UMdMzuavKBkBjYYKigzvYmGF5rm6muQc=",
         "BNfZF9d7540pUGGOQCh3iDxAZcPBqX4qqM00GSLPBek="},
        {"KGdWyEodIn7KKI2e4EFK9tT6Bt3bNMFBRFVTKjjJm2E=",
         "lrbjU/Xn9wDCZQiU8E5fY6igTSozghvo47QeVIIWaUk=",
         "LczqW48MW8qDQIZYRELsz/VCzVDc5niROvk7OqrTxR0="},
        {"wO3xinUGABgEmX+RJZbBbOtAmBuPPFG6oVdimvoo90w=",
         "dCIvTzR6EerOOsRKnWly1a9WGzbJ4qc+6t3SSzLgWFk=",
         "wFj0zpr5PadBoBy0couLuZ1qudZbXLbV/j3UT+AyKeo="},
        {"+JNOBlO4tp9vvQk6UO4r3sILyEgjl+BBoWketZufyn0=",
         "Q6LSv9y7YQkJEzQ/1mpjJEgOrO8GYPUTgcizjh7Cm34=",
         "kg7AG9MuN04xPJ5Z0IcNZ4a8d1b/n4GsGIeyA4FaaSE="},
        {"+EJcThLRwjZ+h1CNNFu15HWzznf4u/lPVw8hifTm2Ec=",
         "Kkn2jFqwBzyIFQfD0OpmePFSmBYmhKagv4pGgkqsWgE=",
         "jYpxojj8WKYe/XIXMP+uv1Fv0+TKrs83tqfzP0AGdcI="},
        {"+DKFqSMNFmxriEFj3qatuzYeTJ9+xWYspZ4ydL3eC0Q=",
         "3o37bsg6HhRg/M9+fTlLcFYc2w/Bz9rLQySvvYCKbRE=",
         "Jb9qoDIBat1EexlgfpRbXa7OflptME8/zt93bldkiVE="},
        {"EH3MjFOMqRoDFQz+hSlJpntWBeH3lTk6WPjTIQjr42o=",
         "PbPewED/nxSBLdM7AXMj7uS3bCgAAg8M6F4iPLd0b1U=",
         "pj4+UgOGkpJwlRvX5BRXZzmzAUnDtUtJsS7LzbcJWzw="},
        {"kL6M2KvO+vPBLEc/a0DpEHTibQ1bwaMRT9b9SkzeP0Y=",
         "pS3G2bHHlkOE6UHP0qVitDuxXgjEaZTviTjNc55RbVs=",
         "ZVZpWOtYqhX3CpF1kATg/38J6pvUJo8AS1sVYjs3rUE="},
        {"sFlcRLDn36fnew2Ld92IHJwnKifdS3aF1MWRPs6K3Wg=",
         "OpjUOTiWExaDYULTINB4yQFqc3mnU3RjQzGRV+KtdFY=",
         "of0V/uoFRNljv/XTt/tXgoquLRH93Ty0KNiaPUpEi2w="},
        {"UJ8hjDsg3jfsnnfPH8Gw9FnCb6taTuviurAfZu+kEFg=",
         "3byjHksUOv8CNjGGKvHvvrJDURBhCIL5UtfZbgyVWCE=",
         "9f7dbWif51gGrE7R9LeuewQSrvGFGTOB3ceJC67jSkI="},
        {"iFFPKGIfqeUKY/w72KAZSjd/PGTqCakHYBV10xMDfnI=",
         "ehneHATNSXtsJTOiPjVSc0QARkihgcfcvoXKFWKfQnI=",
         "yKdqDBcRwA7RCg4GiY/b5IsWcExPleOBde/hjxc36a4="},
        {"GDGocdPJTPUAllxQo7SpXZKqMPn7lpxQELQUX9ETHmE=",
         "n0ScNEou4ekfrXRRXvcADLu2Afj8g5D3TuDP/I4KrnY=",
         "8QhswqAhi/ehhcmCwQF5aSh80TvIGC/gRL5jBn5wOH8="},
        {"UCcrlN8fX2ZdNdhaEBNwktwL+H0ZO7fhaj7rgdUutmw=",
         "LF8J728ilXs4TphnrgR6r0p7W3912DYnsXkGMEPQnRE=",
         "cYfMjxl2REYir7frGeB0u+NHAaFYF02ysgpBhOL5ygc="},
        {"SH0657XuIiHidVmViXZF30RUWtkuWXcWWHmKZHTiOG8=",
         "7k6j49W1u5qgLE5MQUc1osPVW1oPPhzjrGvJ7o9YamY=",
         "dV2+7rNk/3LR2IcwYg/c+Wvzep1yjY7/u1I+nnlTQ00="},
        {"qFQWs6jzrscV42pGISQyA7JDvFFAvEQCWJi584VHD2g=",
         "AT63nHKLC17yUvkR4lOVPxCr4DD3QhXmcmecOTn+Amc=",
         "2Qe2fwJbFcu1CmKpktElOFkSQMqlyvlV3ZUIAd/Dcts="},
        {"6J+yLxgPwWtUbk9I3zbeD8RuK6XkQjJ0wTJ1zSVhflQ=",
         "NJzMBYyPZjk3eLmgdKaOeWyNER5YZF1mR8Umeiu9f28=",
         "pp+4+XHw5ZmHGJ7WbZ1xLYRsnTI17QIbb0bzHzYZrBs="},
        {"KJGoWYNVDUWcEMg+E4tljv1LiWAbdRw2QVapYqdFa1Y=",
         "M2SGk9WVnzYNGnT777G/JE8uUsY2f7mszTwlue73UDE=",
         "Jg8N7GbhbYB400foFP+OH0v+hCaL1jW61bajSA6EZqc="},
        {"uAgrgppPyIvk8S1CHUmaCaORsgFFfBreB8pxXmbSdXw=",
         "dJ22bER4fD3qF2/yIGWQ7SgmZ990sy/SbANjmUMkzws=",
         "mKkd0OoAR9sClmD+k3fL9weBsoCy5GQGz9BP0kAQIjc="},
        {"EI3Q8gePNPrtFyoMcv7hOihQgroF/dfjzPn8yvpGPWQ=",
         "Y9QhJFeiyuuIZNPU56B6U//ZK+XTTe4EP7h/p3Q+dE8=",
         "qBVUYw9rTWaxn55nUd55NpCWtxOUSWLt4WJGusiDS8Q="},
        {"oEQvdRm/yHkx+JvlhHGT5RUFrFEUleKb9DCT55EqZ30=",
         "8hsh/UHwWADTHntOJq4dy0o7ahcNAAlo2rDpjzzrVXk=",
         "/GF2inW2mPtA26IgFdgOEBbBEerT740wWuP/8NyANdc="},
        {"6OWrGKZKNsgfRezSUw29EnHymcgKyEKvX5/pZQlLmWs=",
         "oaJeO6YSS2dodNEf97DvgWrYnFFelG5daEdN84jVVGw=",
         "T5wvTdyVxK0LY96kouLjs06oUfhGChfty8OUL1Mddro="},
        {"mPmzQbh2R+r1DC5hSquzKM1SDrxUdfnBPRPJrpqrgkE=",
         "BtUHAnYWjDjBI42qBf9dJqezTUikYsF96o6PKEWPrVo=",
         "MxU8EMmq+vVHpuK/AkFZrZDF2b+VbSqukZLPbNsCcgo="},
        {"8GVxuoo1Veyr+nqxr5Q4vmsMf5qfiXwSlQ4q3+BU60g=",
         "uSOLe/E9/OjIgUOk0NMBHB45E0+q4Rd+IUO2UOxmKlM=",
         "+30F+56OE0Sr3wY2clKw4kgE+2XiucMg7xjK6EemXuk="},
        {"qORPKb+qFuU/9TpFbRUupHsqm9iyk9pa6cpik+EVDkg=",
         "bMZxxd+Z9I0XA1h9U8JEY+/mRxWGnvbXDZ5Dxz7YzS0=",
         "SmkkqOz4OhHuSL6cxuRm9+Mlt50Sfd0sMDFTC78gqOE="},
        {"2Ko3IYhXKcdOMIJGNpASk9saNSZsI64lyJPOoxpQ2kI=",
         "xVOc9PxY1VFaZfemmKi+Ei2liHhmeTu+JMa+rS00gnA=",
         "+398DlW8kWeI2aRaC4QfcrEjwqPKCohyDeWdaI1wvv0="},
        {"CPioGCVpxnym62nH/QoCt1RiiaaxUcuFjvh5kRhjqHA=",
         "W0XxlBLrZgFKhggMvvv6oFf/RJbfs92qv8JK9e+5i2o=",
         "bsK2U6CRAUv1uVgYQ7NpqjWWswFIDiDPDEtU1XQygSA="},
        {"AF17siKaeiO85hikYN0IWCMGWqPm1UOoCkXMltJGUVk=",
         "B+PFos9aN2S5bLxzGZHljRZj41j3rIx8RWu0vDUzq1w=",
         "Qb8d6iDYv3m1h7PE8j0Exl2cSwpHkim/fJ1S4P7MYvY="},
        {"wMFDBTJzx5tDCBhMkrptYJ8w9EeURjc4xeDQpevxAWo=",
         "4ec439EXE5WQzvtV9reSX+aMmdq5k7o9Ayt8oQp+RhQ=",
         "jwQlvdNH5WtSSU10H+fh/JisOlaBaohDPEp/BYnTt1Q="},
        {"4GaJpIFigNDwd31O84pLIMM/o2qhp0ydlI/ydD/2a2Q=",
         "r/LdkCoK5/BPGdq2+XJO8sCRhI+8ULFmg0887V43PAI=",
         "Da+3ZZvEJdx4TYFMIDUlbkmytILnSTNxTKX+sQdjMd4="},
        {"gMnojGqCLmMfGp2m31xlKZ/rIV2b8ockw9DPahRyu0c=",
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    };
    gs_unref_ptrarray GPtrArray *allowed_ips_keep_alive = NULL;
    gs_unref_array GArray *peers                        = NULL;
    NMPlatformLnkWireGuard lnk_wireguard;
    int                    r;
    guint                  i;

    allowed_ips_keep_alive = g_ptr_array_new_with_free_func(g_free);

    peers = g_array_new(FALSE, TRUE, sizeof(NMPWireGuardPeer));

    lnk_wireguard = (NMPlatformLnkWireGuard){
        .listen_port = 50754,
        .fwmark      = 0x1102,
    };
    _copy_base64(lnk_wireguard.private_key, sizeof(lnk_wireguard.private_key), self_key.pri);
    _copy_base64(lnk_wireguard.public_key, sizeof(lnk_wireguard.public_key), self_key.pub);

    if (test_mode == 0) {
        /* no peers. */
    } else if (NM_IN_SET(test_mode, 1, 2)) {
        guint num_peers = (test_mode == 1) ? 1 : G_N_ELEMENTS(keys);

        for (i = 0; i < num_peers; i++) {
            NMPWireGuardPeer       peer;
            char                   s_addr[NM_UTILS_INET_ADDRSTRLEN];
            NMSockAddrUnion        endpoint;
            guint                  i_allowed_ips, n_allowed_ips;
            NMPWireGuardAllowedIP *allowed_ips;

            if ((i % 2) == 1) {
                endpoint = (NMSockAddrUnion){
                    .in =
                        {
                            .sin_family = AF_INET,
                            .sin_addr.s_addr =
                                nmtst_inet4_from_string(nm_sprintf_buf(s_addr, "192.168.7.%d", i)),
                            .sin_port = htons(14000 + i),
                        },
                };
            } else {
                endpoint = (NMSockAddrUnion){
                    .in6 =
                        {
                            .sin6_family = AF_INET6,
                            .sin6_addr   = *nmtst_inet6_from_string(
                                nm_sprintf_buf(s_addr, "a:b:c:e::1:%d", i)),
                            .sin6_port = htons(16000 + i),
                        },
                };
            }

            if (test_mode == 1)
                n_allowed_ips = 1;
            else
                n_allowed_ips = i % 10;
            allowed_ips = g_new0(NMPWireGuardAllowedIP, n_allowed_ips);
            g_ptr_array_add(allowed_ips_keep_alive, allowed_ips);
            for (i_allowed_ips = 0; i_allowed_ips < n_allowed_ips; i_allowed_ips++) {
                NMPWireGuardAllowedIP *aip = &allowed_ips[i_allowed_ips];

                aip->family = (i_allowed_ips % 2) ? AF_INET : AF_INET6;
                if (aip->family == AF_INET) {
                    aip->addr.addr4 = nmtst_inet4_from_string(
                        nm_sprintf_buf(s_addr, "10.%u.%u.0", i, i_allowed_ips));
                    aip->mask = 32 - (i_allowed_ips % 8);
                } else {
                    aip->addr.addr6 = *nmtst_inet6_from_string(
                        nm_sprintf_buf(s_addr, "a:d:f:%02x:%02x::", i, i_allowed_ips));
                    aip->mask = 128 - (i_allowed_ips % 10);
                }
            }

            peer = (NMPWireGuardPeer){
                .persistent_keepalive_interval = 60 + i,
                .endpoint                      = endpoint,
                .allowed_ips                   = n_allowed_ips > 0 ? allowed_ips : NULL,
                .allowed_ips_len               = n_allowed_ips,
            };
            _copy_base64(peer.public_key, sizeof(peer.public_key), keys[i].pub);
            _copy_base64(peer.preshared_key,
                         sizeof(peer.preshared_key),
                         (i % 3) ? NULL : keys[i].pre);

            g_array_append_val(peers, peer);
        }
    } else
        g_assert_not_reached();

    r = nm_platform_link_wireguard_change(platform,
                                          ifindex,
                                          &lnk_wireguard,
                                          (const NMPWireGuardPeer *) peers->data,
                                          NULL,
                                          peers->len,
                                          NM_PLATFORM_WIREGUARD_CHANGE_FLAG_HAS_PRIVATE_KEY
                                              | NM_PLATFORM_WIREGUARD_CHANGE_FLAG_HAS_LISTEN_PORT
                                              | NM_PLATFORM_WIREGUARD_CHANGE_FLAG_HAS_FWMARK
                                              | NM_PLATFORM_WIREGUARD_CHANGE_FLAG_REPLACE_PEERS);
    g_assert(NMTST_NM_ERR_SUCCESS(r));
}

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

typedef struct {
    NMLinkType link_type;
    int        test_mode;
    gboolean   external_command;
} TestAddSoftwareDetectData;

static void
test_software_detect(gconstpointer user_data)
{
    const TestAddSoftwareDetectData *test_data = user_data;
    int                              ifindex, ifindex_parent;
    const NMPlatformLink *           plink;
    const NMPObject *                lnk;
    int                              r;
    guint                            i_step;
    const gboolean                   ext        = test_data->external_command;
    NMPlatformLnkBridge              lnk_bridge = {};
    NMPlatformLnkTun                 lnk_tun;
    NMPlatformLnkGre                 lnk_gre = {};
    nm_auto_close int                tun_fd  = -1;

    nmtstp_run_command_check("ip link add %s type dummy", PARENT_NAME);
    ifindex_parent =
        nmtstp_assert_wait_for_link(NM_PLATFORM_GET, PARENT_NAME, NM_LINK_TYPE_DUMMY, 100)->ifindex;

    switch (test_data->link_type) {
    case NM_LINK_TYPE_BRIDGE:

        lnk_bridge.forward_delay = 1560;
        lnk_bridge.hello_time    = 150;
        lnk_bridge.max_age       = 2100;
        lnk_bridge.ageing_time   = 2200;
        lnk_bridge.stp_state     = TRUE;
        lnk_bridge.priority      = 22;
        lnk_bridge.vlan_protocol = 0x8100;
        lnk_bridge.vlan_stats_enabled =
            nmtstp_kernel_support_get(NM_PLATFORM_KERNEL_SUPPORT_TYPE_IFLA_BR_VLAN_STATS_ENABLED)
                ? TRUE
                : FALSE;
        lnk_bridge.group_fwd_mask             = 8;
        lnk_bridge.group_addr                 = (NMEtherAddr){{0x01, 0x80, 0xC2, 0x00, 0x00, 0x08}};
        lnk_bridge.mcast_snooping             = TRUE;
        lnk_bridge.mcast_router               = 1;
        lnk_bridge.mcast_query_use_ifaddr     = TRUE;
        lnk_bridge.mcast_querier              = TRUE;
        lnk_bridge.mcast_hash_max             = 1024;
        lnk_bridge.mcast_last_member_count    = 2;
        lnk_bridge.mcast_startup_query_count  = 3;
        lnk_bridge.mcast_last_member_interval = 5000;
        lnk_bridge.mcast_membership_interval  = 25000;
        lnk_bridge.mcast_querier_interval     = 26000;
        lnk_bridge.mcast_query_interval       = 12000;
        lnk_bridge.mcast_query_response_interval = 5200;
        lnk_bridge.mcast_startup_query_interval  = 3000;

        if (!nmtstp_link_bridge_add(NULL, ext, DEVICE_NAME, &lnk_bridge))
            g_error("Failed adding Bridge interface");
        break;

    case NM_LINK_TYPE_GRE:
    {
        gboolean gracefully_skip = FALSE;

        lnk_gre.local              = nmtst_inet4_from_string("192.168.233.204");
        lnk_gre.remote             = nmtst_inet4_from_string("172.168.10.25");
        lnk_gre.parent_ifindex     = ifindex_parent;
        lnk_gre.ttl                = 174;
        lnk_gre.tos                = 37;
        lnk_gre.path_mtu_discovery = TRUE;

        if (!nm_platform_link_get_by_ifname(NM_PLATFORM_GET, "gre0")) {
            /* Seems that the ip_gre module is not loaded... try to load it. */
            gracefully_skip = nm_utils_modprobe(NULL, TRUE, "ip_gre", NULL) != 0;
        }

        if (!nmtstp_link_gre_add(NULL, ext, DEVICE_NAME, &lnk_gre)) {
            if (gracefully_skip) {
                g_test_skip(
                    "Cannot create gre tunnel because of missing ip_gre module (modprobe ip_gre)");
                goto out_delete_parent;
            }
            g_error("Failed adding GRE tunnel");
        }
        break;
    }
    case NM_LINK_TYPE_GRETAP:
    {
        gboolean gracefully_skip = FALSE;

        lnk_gre.local              = nmtst_inet4_from_string("192.168.1.133");
        lnk_gre.remote             = nmtst_inet4_from_string("172.168.101.2");
        lnk_gre.parent_ifindex     = ifindex_parent;
        lnk_gre.ttl                = 39;
        lnk_gre.tos                = 12;
        lnk_gre.path_mtu_discovery = FALSE;
        lnk_gre.is_tap             = TRUE;

        if (!nm_platform_link_get_by_ifname(NM_PLATFORM_GET, "gretap0")) {
            /* Seems that the ip_gre module is not loaded... try to load it. */
            gracefully_skip = nm_utils_modprobe(NULL, TRUE, "ip_gre", NULL) != 0;
        }

        if (!nmtstp_link_gre_add(NULL, ext, DEVICE_NAME, &lnk_gre)) {
            if (gracefully_skip) {
                g_test_skip("Cannot create gretap tunnel because of missing ip_gre module "
                            "(modprobe ip_gre)");
                goto out_delete_parent;
            }
            g_error("Failed adding GRETAP tunnel");
        }
        break;
    }
    case NM_LINK_TYPE_IPIP:
    {
        NMPlatformLnkIpIp lnk_ipip        = {};
        gboolean          gracefully_skip = FALSE;

        if (!nm_platform_link_get_by_ifname(NM_PLATFORM_GET, "tunl0")) {
            /* Seems that the ipip module is not loaded... try to load it. */
            gracefully_skip = nm_utils_modprobe(NULL, TRUE, "ipip", NULL) != 0;
        }

        lnk_ipip.local              = nmtst_inet4_from_string("1.2.3.4");
        lnk_ipip.remote             = nmtst_inet4_from_string("5.6.7.8");
        lnk_ipip.parent_ifindex     = ifindex_parent;
        lnk_ipip.tos                = 32;
        lnk_ipip.path_mtu_discovery = FALSE;

        if (!nmtstp_link_ipip_add(NULL, ext, DEVICE_NAME, &lnk_ipip)) {
            if (gracefully_skip) {
                g_test_skip(
                    "Cannot create ipip tunnel because of missing ipip module (modprobe ipip)");
                goto out_delete_parent;
            }
            g_error("Failed adding IPIP tunnel");
        }
        break;
    }
    case NM_LINK_TYPE_IP6TNL:
    {
        NMPlatformLnkIp6Tnl lnk_ip6tnl      = {};
        gboolean            gracefully_skip = FALSE;

        if (!nm_platform_link_get_by_ifname(NM_PLATFORM_GET, "ip6tnl0")) {
            /* Seems that the ip6_tunnel module is not loaded... try to load it. */
            gracefully_skip = nm_utils_modprobe(NULL, TRUE, "ip6_tunnel", NULL) != 0;
        }

        switch (test_data->test_mode) {
        case 0:
            lnk_ip6tnl.local          = *nmtst_inet6_from_string("fd01::15");
            lnk_ip6tnl.remote         = *nmtst_inet6_from_string("fd01::16");
            lnk_ip6tnl.parent_ifindex = ifindex_parent;
            lnk_ip6tnl.tclass         = 20;
            lnk_ip6tnl.encap_limit    = 6;
            lnk_ip6tnl.flow_label     = 1337;
            lnk_ip6tnl.proto          = IPPROTO_IPV6;
            break;
        case 1:
            lnk_ip6tnl.local          = *nmtst_inet6_from_string("fd01::17");
            lnk_ip6tnl.remote         = *nmtst_inet6_from_string("fd01::18");
            lnk_ip6tnl.parent_ifindex = ifindex_parent;
            lnk_ip6tnl.tclass         = 0;
            lnk_ip6tnl.encap_limit    = 0;
            lnk_ip6tnl.flow_label     = 1338;
            lnk_ip6tnl.proto          = IPPROTO_IPV6;
            lnk_ip6tnl.flags          = IP6_TNL_F_IGN_ENCAP_LIMIT | IP6_TNL_F_USE_ORIG_TCLASS;
            break;
        }

        if (!nmtstp_link_ip6tnl_add(NULL, ext, DEVICE_NAME, &lnk_ip6tnl)) {
            if (gracefully_skip) {
                g_test_skip("Cannot create ip6tnl tunnel because of missing ip6_tunnel module "
                            "(modprobe ip6_tunnel)");
                goto out_delete_parent;
            }
            g_error("Failed adding IP6TNL tunnel");
        }
        break;
    }
    case NM_LINK_TYPE_IP6GRE:
    {
        NMPlatformLnkIp6Tnl lnk_ip6tnl      = {};
        gboolean            gracefully_skip = FALSE;

        if (!nm_platform_link_get_by_ifname(NM_PLATFORM_GET, "ip6gre0")) {
            /* Seems that the ip6_tunnel module is not loaded... try to load it. */
            gracefully_skip = nm_utils_modprobe(NULL, TRUE, "ip6_gre", NULL) != 0;
        }

        lnk_ip6tnl.local          = *nmtst_inet6_from_string("fd01::42");
        lnk_ip6tnl.remote         = *nmtst_inet6_from_string("fd01::aaaa");
        lnk_ip6tnl.parent_ifindex = ifindex_parent;
        lnk_ip6tnl.tclass         = 21;
        lnk_ip6tnl.flow_label     = 1338;
        lnk_ip6tnl.is_gre         = TRUE;

        if (!nmtstp_link_ip6gre_add(NULL, ext, DEVICE_NAME, &lnk_ip6tnl)) {
            if (gracefully_skip) {
                g_test_skip("Cannot create ip6gre tunnel because of missing ip6_gre module "
                            "(modprobe ip6_gre)");
                goto out_delete_parent;
            }
            g_error("Failed adding IP6GRE tunnel");
        }
        break;
    }
    case NM_LINK_TYPE_IP6GRETAP:
    {
        NMPlatformLnkIp6Tnl lnk_ip6tnl      = {};
        gboolean            gracefully_skip = FALSE;

        if (!nm_platform_link_get_by_ifname(NM_PLATFORM_GET, "ip6gre0")) {
            /* Seems that the ip6_tunnel module is not loaded... try to load it. */
            gracefully_skip = nm_utils_modprobe(NULL, TRUE, "ip6_gre", NULL) != 0;
        }

        lnk_ip6tnl.local          = *nmtst_inet6_from_string("fe80::abcd");
        lnk_ip6tnl.remote         = *nmtst_inet6_from_string("fc01::bbbb");
        lnk_ip6tnl.parent_ifindex = ifindex_parent;
        lnk_ip6tnl.ttl            = 10;
        lnk_ip6tnl.tclass         = 22;
        lnk_ip6tnl.flow_label     = 1339;
        lnk_ip6tnl.is_gre         = TRUE;
        lnk_ip6tnl.is_tap         = TRUE;

        if (!nmtstp_link_ip6gre_add(NULL, ext, DEVICE_NAME, &lnk_ip6tnl)) {
            if (gracefully_skip) {
                g_test_skip("Cannot create ip6gretap tunnel because of missing ip6_gre module "
                            "(modprobe ip6_gre)");
                goto out_delete_parent;
            }
            g_error("Failed adding IP6GRETAP tunnel");
        }
        break;
    }
    case NM_LINK_TYPE_MACVLAN:
    {
        NMPlatformLnkMacvlan  lnk_macvlan = {};
        const NMPlatformLink *dummy;
        char                  buf[256];
        int                   i;

        lnk_macvlan.mode       = MACVLAN_MODE_BRIDGE;
        lnk_macvlan.no_promisc = FALSE;
        lnk_macvlan.tap        = FALSE;

        /* Since in old kernel versions sysfs files for macvtaps are not
         * namespaced, the creation can fail if a macvtap in another namespace
         * has the same index. Try to detect this situation and skip already
         * used indexes.
         * The fix (17af2bce) is included kernel 4.7, dated 24 July, 2016.
         */
        for (i = ifindex_parent + 1; i < ifindex_parent + 100; i++) {
            snprintf(buf, sizeof(buf), "/sys/class/macvtap/tap%d", i);
            if (!g_file_test(buf, G_FILE_TEST_IS_SYMLINK))
                break;

            _LOGD("skipping ifindex %d as already used by a macvtap", i);

            dummy = nmtstp_link_dummy_add(NM_PLATFORM_GET, FALSE, "dummy-tmp");
            g_assert_cmpint(dummy->ifindex, ==, i);
            nmtstp_link_delete(NM_PLATFORM_GET, FALSE, dummy->ifindex, NULL, TRUE);
        }

        if (!nmtstp_link_macvlan_add(NULL, ext, DEVICE_NAME, ifindex_parent, &lnk_macvlan))
            g_error("Failed adding MACVLAN interface");
        break;
    }
    case NM_LINK_TYPE_MACVTAP:
    {
        NMPlatformLnkMacvlan lnk_macvtap = {};

        lnk_macvtap.mode       = MACVLAN_MODE_PRIVATE;
        lnk_macvtap.no_promisc = FALSE;
        lnk_macvtap.tap        = TRUE;

        if (!nmtstp_link_macvlan_add(NULL, ext, DEVICE_NAME, ifindex_parent, &lnk_macvtap))
            g_error("Failed adding MACVTAP interface");
        break;
    }
    case NM_LINK_TYPE_SIT:
    {
        NMPlatformLnkSit lnk_sit         = {};
        gboolean         gracefully_skip = FALSE;

        lnk_sit.local              = nmtst_inet4_from_string("192.168.200.1");
        lnk_sit.remote             = nmtst_inet4_from_string("172.25.100.14");
        lnk_sit.parent_ifindex     = ifindex_parent;
        lnk_sit.ttl                = 0;
        lnk_sit.tos                = 31;
        lnk_sit.path_mtu_discovery = FALSE;

        if (!nm_platform_link_get_by_ifname(NM_PLATFORM_GET, "sit0")) {
            /* Seems that the sit module is not loaded... try to load it. */
            gracefully_skip = nm_utils_modprobe(NULL, TRUE, "sit", NULL) != 0;
        }

        if (!nmtstp_link_sit_add(NULL, ext, DEVICE_NAME, &lnk_sit)) {
            if (gracefully_skip) {
                g_test_skip(
                    "Cannot create sit tunnel because of missing sit module (modprobe sit)");
                goto out_delete_parent;
            }
            g_error("Failed adding SIT tunnel");
        }
        break;
    }
    case NM_LINK_TYPE_VLAN:
        nmtstp_run_command_check("ip link add name %s link %s type vlan id 1242",
                                 DEVICE_NAME,
                                 PARENT_NAME);
        break;
    case NM_LINK_TYPE_VRF:
    {
        NMPlatformLnkVrf lnk_vrf = {};
        gboolean         not_supported;

        lnk_vrf.table = 9876;

        if (!nmtstp_link_vrf_add(NULL, ext, DEVICE_NAME, &lnk_vrf, &not_supported)) {
            if (not_supported) {
                g_test_skip("Cannot create VRF interface because of missing kernel support");
                goto out_delete_parent;
            }
            g_error("Failed adding VRF interface");
        }
        break;
    }
    case NM_LINK_TYPE_VXLAN:
    {
        NMPlatformLnkVxlan lnk_vxlan = {};

        switch (test_data->test_mode) {
        case 0:
            lnk_vxlan.parent_ifindex = nm_platform_link_get_ifindex(NM_PLATFORM_GET, PARENT_NAME);
            lnk_vxlan.id             = 42;
            lnk_vxlan.local          = nmtst_inet4_from_string("23.1.2.164");
            lnk_vxlan.group          = nmtst_inet4_from_string("239.1.2.134");
            lnk_vxlan.dst_port       = 4789;
            lnk_vxlan.learning       = TRUE;
            lnk_vxlan.ageing         = 1245;
            break;
        case 1:
            lnk_vxlan.parent_ifindex = nm_platform_link_get_ifindex(NM_PLATFORM_GET, PARENT_NAME);
            lnk_vxlan.id             = 11214423;
            lnk_vxlan.local6         = *nmtst_inet6_from_string("1:2:3:4:334:23::23");
            lnk_vxlan.group6         = *nmtst_inet6_from_string("ff0e::115");
            lnk_vxlan.ttl            = 32;
            lnk_vxlan.dst_port       = 57412;
            lnk_vxlan.src_port_min   = 1000;
            lnk_vxlan.src_port_max   = 1003;
            lnk_vxlan.learning       = TRUE;
            lnk_vxlan.ageing         = 3245;
            break;
        }

        g_assert(nmtstp_link_vxlan_add(NULL, ext, DEVICE_NAME, &lnk_vxlan));
        break;
    }
    case NM_LINK_TYPE_TUN:
    {
        gboolean owner_valid = nmtst_get_rand_bool();
        gboolean group_valid = nmtst_get_rand_bool();

        switch (test_data->test_mode) {
        case 0:
            lnk_tun = (NMPlatformLnkTun){
                .type        = nmtst_get_rand_bool() ? IFF_TUN : IFF_TAP,
                .owner       = owner_valid ? getuid() : 0,
                .owner_valid = owner_valid,
                .group       = group_valid ? getgid() : 0,
                .group_valid = group_valid,
                .pi          = nmtst_get_rand_bool(),
                .vnet_hdr    = nmtst_get_rand_bool(),
                .multi_queue = nmtst_get_rand_bool(),

                /* if we add the device via iproute2 (external), we can only
                 * create persistent devices. */
                .persist = (ext == 1) ? TRUE : nmtst_get_rand_bool(),
            };
            break;
        default:
            g_assert_not_reached();
            break;
        }

        g_assert(nmtstp_link_tun_add(NULL,
                                     ext,
                                     DEVICE_NAME,
                                     &lnk_tun,
                                     (!lnk_tun.persist || nmtst_get_rand_bool()) ? &tun_fd : NULL));
        break;
    }
    case NM_LINK_TYPE_WIREGUARD:
    {
        const NMPlatformLink *link;

        r = nm_platform_link_wireguard_add(NM_PLATFORM_GET, DEVICE_NAME, &link);
        if (r == -EOPNOTSUPP) {
            g_test_skip("wireguard not supported (modprobe wireguard?)");
            goto out_delete_parent;
        }

        g_assert(NMTST_NM_ERR_SUCCESS(r));
        g_assert(NMP_OBJECT_GET_TYPE(NMP_OBJECT_UP_CAST(link)) == NMP_OBJECT_TYPE_LINK);
        break;
    }
    default:
        g_assert_not_reached();
    }

    ifindex = nmtstp_assert_wait_for_link(NM_PLATFORM_GET, DEVICE_NAME, test_data->link_type, 100)
                  ->ifindex;

    nmtstp_link_set_updown(NULL, -1, ifindex_parent, TRUE);

    for (i_step = 0; i_step < 5; i_step++) {
        _LOGD("test-software-detect: step %u", i_step);
        if (nmtst_is_debug())
            nmtstp_run_command_check("ip -d link show %s", DEVICE_NAME);

        if (i_step > 0) {
            gboolean set_up = (i_step % 2) == 1;

            if (test_data->link_type == NM_LINK_TYPE_VXLAN && set_up) {
                /* On RHEL-7, we need to add a tiny sleep here, otherwise,
                 * upping the vxlan device fails with EADDRINUSE.
                 * https://bugzilla.redhat.com/show_bug.cgi?id=1277131 */
                g_usleep(1);
            }
            nmtstp_link_set_updown(NULL, -1, ifindex, set_up);
        }

        lnk = nm_platform_link_get_lnk(NM_PLATFORM_GET, ifindex, test_data->link_type, &plink);
        g_assert(plink);
        g_assert_cmpint(plink->ifindex, ==, ifindex);

        if (!lnk && test_data->link_type == NM_LINK_TYPE_TUN) {
            /* this is ok. Kernel apparently does not support tun properties via netlink. We
             * fetch them from sysfs below. */
        } else
            g_assert(lnk);

        switch (test_data->link_type) {
        case NM_LINK_TYPE_BRIDGE:
        {
            const NMPlatformLnkBridge *plnk = &lnk->lnk_bridge;

            g_assert(plnk == nm_platform_link_get_lnk_bridge(NM_PLATFORM_GET, ifindex, NULL));
            g_assert_cmpint(nm_platform_lnk_bridge_cmp(&lnk_bridge, plnk), ==, 0);
            g_assert_cmpint(plnk->forward_delay, ==, 1560);
            g_assert_cmpint(plnk->hello_time, ==, 150);
            g_assert_cmpint(plnk->max_age, ==, 2100);
            g_assert_cmpint(plnk->ageing_time, ==, 2200);
            g_assert_cmpint(plnk->stp_state, ==, TRUE);
            g_assert_cmpint(plnk->priority, ==, 22);
            g_assert_cmpint(plnk->vlan_protocol, ==, 0x8100);
            g_assert_cmpint(plnk->vlan_stats_enabled, ==, lnk_bridge.vlan_stats_enabled);
            g_assert_cmpint(plnk->group_fwd_mask, ==, 8);
            g_assert_cmpint(plnk->mcast_snooping, ==, TRUE);
            g_assert_cmpint(plnk->mcast_router, ==, 1);
            g_assert_cmpint(plnk->mcast_query_use_ifaddr, ==, TRUE);
            g_assert_cmpint(plnk->mcast_querier, ==, TRUE);
            g_assert_cmpint(plnk->mcast_hash_max, ==, 1024);
            g_assert_cmpint(plnk->mcast_last_member_count, ==, 2);
            g_assert_cmpint(plnk->mcast_startup_query_count, ==, 3);
            g_assert_cmpint(plnk->mcast_last_member_interval, ==, 5000);
            g_assert_cmpint(plnk->mcast_membership_interval, ==, 25000);
            g_assert_cmpint(plnk->mcast_querier_interval, ==, 26000);
            g_assert_cmpint(plnk->mcast_query_interval, ==, 12000);
            g_assert_cmpint(plnk->mcast_query_response_interval, ==, 5200);
            g_assert_cmpint(plnk->mcast_startup_query_interval, ==, 3000);
            g_assert_cmpint(nm_platform_lnk_bridge_cmp(&lnk_bridge, plnk), ==, 0);
            break;
        }
        case NM_LINK_TYPE_GRE:
        {
            const NMPlatformLnkGre *plnk = &lnk->lnk_gre;

            g_assert(plnk == nm_platform_link_get_lnk_gre(NM_PLATFORM_GET, ifindex, NULL));
            g_assert(nm_platform_lnk_gre_cmp(plnk, &lnk_gre) == 0);

            break;
        }
        case NM_LINK_TYPE_GRETAP:
        {
            const NMPlatformLnkGre *plnk = &lnk->lnk_gre;

            g_assert(plnk == nm_platform_link_get_lnk_gretap(NM_PLATFORM_GET, ifindex, NULL));
            g_assert(nm_platform_lnk_gre_cmp(plnk, &lnk_gre) == 0);
            break;
        }
        case NM_LINK_TYPE_IP6TNL:
        {
            const NMPlatformLnkIp6Tnl *plnk = &lnk->lnk_ip6tnl;

            switch (test_data->test_mode) {
            case 0:
                g_assert(plnk == nm_platform_link_get_lnk_ip6tnl(NM_PLATFORM_GET, ifindex, NULL));
                g_assert_cmpint(plnk->parent_ifindex, ==, ifindex_parent);
                nmtst_assert_ip6_address(&plnk->local, "fd01::15");
                nmtst_assert_ip6_address(&plnk->remote, "fd01::16");
                g_assert_cmpint(plnk->ttl, ==, 0);
                g_assert_cmpint(plnk->tclass, ==, 20);
                g_assert_cmpint(plnk->encap_limit, ==, 6);
                g_assert_cmpint(plnk->flow_label, ==, 1337);
                g_assert_cmpint(plnk->proto, ==, IPPROTO_IPV6);
                break;
            case 1:
                g_assert(plnk == nm_platform_link_get_lnk_ip6tnl(NM_PLATFORM_GET, ifindex, NULL));
                g_assert_cmpint(plnk->parent_ifindex, ==, ifindex_parent);
                nmtst_assert_ip6_address(&plnk->local, "fd01::17");
                nmtst_assert_ip6_address(&plnk->remote, "fd01::18");
                g_assert_cmpint(plnk->ttl, ==, 0);
                g_assert_cmpint(plnk->flow_label, ==, 1338);
                g_assert_cmpint(plnk->proto, ==, IPPROTO_IPV6);
                g_assert_cmpint(plnk->flags & 0xFFFF, /* ignore kernel internal flags */
                                ==,
                                IP6_TNL_F_IGN_ENCAP_LIMIT | IP6_TNL_F_USE_ORIG_TCLASS);
                break;
            }
            break;
        }
        case NM_LINK_TYPE_IP6GRE:
        {
            const NMPlatformLnkIp6Tnl *plnk = &lnk->lnk_ip6tnl;

            g_assert(plnk == nm_platform_link_get_lnk_ip6gre(NM_PLATFORM_GET, ifindex, NULL));
            g_assert_cmpint(plnk->parent_ifindex, ==, ifindex_parent);
            nmtst_assert_ip6_address(&plnk->local, "fd01::42");
            nmtst_assert_ip6_address(&plnk->remote, "fd01::aaaa");
            g_assert_cmpint(plnk->tclass, ==, 21);
            g_assert_cmpint(plnk->flow_label, ==, 1338);
            g_assert_cmpint(plnk->is_gre, ==, TRUE);
            g_assert_cmpint(plnk->is_tap, ==, FALSE);
            break;
        }
        case NM_LINK_TYPE_IP6GRETAP:
        {
            const NMPlatformLnkIp6Tnl *plnk = &lnk->lnk_ip6tnl;

            g_assert(plnk == nm_platform_link_get_lnk_ip6gretap(NM_PLATFORM_GET, ifindex, NULL));
            g_assert_cmpint(plnk->parent_ifindex, ==, ifindex_parent);
            nmtst_assert_ip6_address(&plnk->local, "fe80::abcd");
            nmtst_assert_ip6_address(&plnk->remote, "fc01::bbbb");
            g_assert_cmpint(plnk->ttl, ==, 10);
            g_assert_cmpint(plnk->tclass, ==, 22);
            g_assert_cmpint(plnk->flow_label, ==, 1339);
            g_assert_cmpint(plnk->is_gre, ==, TRUE);
            g_assert_cmpint(plnk->is_tap, ==, TRUE);
            break;
        }
        case NM_LINK_TYPE_IPIP:
        {
            const NMPlatformLnkIpIp *plnk = &lnk->lnk_ipip;

            g_assert(plnk == nm_platform_link_get_lnk_ipip(NM_PLATFORM_GET, ifindex, NULL));
            g_assert_cmpint(plnk->parent_ifindex, ==, ifindex_parent);
            nmtst_assert_ip4_address(plnk->local, "1.2.3.4");
            nmtst_assert_ip4_address(plnk->remote, "5.6.7.8");
            g_assert_cmpint(plnk->ttl, ==, 0);
            g_assert_cmpint(plnk->tos, ==, 32);
            g_assert_cmpint(plnk->path_mtu_discovery, ==, FALSE);
            break;
        }
        case NM_LINK_TYPE_MACVLAN:
        {
            const NMPlatformLnkMacvlan *plnk = &lnk->lnk_macvlan;

            g_assert(plnk == nm_platform_link_get_lnk_macvlan(NM_PLATFORM_GET, ifindex, NULL));
            g_assert_cmpint(plnk->no_promisc, ==, FALSE);
            g_assert_cmpint(plnk->mode, ==, MACVLAN_MODE_BRIDGE);
            break;
        }
        case NM_LINK_TYPE_MACVTAP:
        {
            const NMPlatformLnkMacvlan *plnk = &lnk->lnk_macvlan;

            g_assert(plnk == nm_platform_link_get_lnk_macvtap(NM_PLATFORM_GET, ifindex, NULL));
            g_assert_cmpint(plnk->no_promisc, ==, FALSE);
            g_assert_cmpint(plnk->mode, ==, MACVLAN_MODE_PRIVATE);
            break;
        }
        case NM_LINK_TYPE_SIT:
        {
            const NMPlatformLnkSit *plnk = &lnk->lnk_sit;

            g_assert(plnk == nm_platform_link_get_lnk_sit(NM_PLATFORM_GET, ifindex, NULL));
            g_assert_cmpint(plnk->parent_ifindex, ==, ifindex_parent);
            nmtst_assert_ip4_address(plnk->local, "192.168.200.1");
            nmtst_assert_ip4_address(plnk->remote, "172.25.100.14");
            g_assert_cmpint(plnk->ttl, ==, 0);
            g_assert_cmpint(plnk->tos, ==, 31);
            g_assert_cmpint(plnk->path_mtu_discovery, ==, FALSE);
            break;
        }
        case NM_LINK_TYPE_TUN:
        {
            const NMPlatformLnkTun *plnk;
            NMPlatformLnkTun        lnk_tun2;

            g_assert((lnk ? &lnk->lnk_tun : NULL)
                     == nm_platform_link_get_lnk_tun(NM_PLATFORM_GET, ifindex, NULL));

            /* kernel might not expose tun options via netlink. Either way, try
             * to read them (either from platform cache, or fallback to sysfs).
             * See also: rh#1547213. */
            if (!nm_platform_link_tun_get_properties(NM_PLATFORM_GET, ifindex, &lnk_tun2))
                g_assert_not_reached();

            plnk = lnk ? &lnk->lnk_tun : &lnk_tun2;
            if (lnk)
                g_assert(memcmp(plnk, &lnk_tun2, sizeof(NMPlatformLnkTun)) == 0);

            if (i_step == 0) {
                /* Before we upped the device for the first time the kernel didn't notify
                 * us of the owner set after the link creation:
                 * https://bugzilla.redhat.com/show_bug.cgi?id=1566062
                 */
                break;
            }

            g_assert(nm_platform_lnk_tun_cmp(plnk, &lnk_tun) == 0);
            break;
        }
        case NM_LINK_TYPE_VLAN:
        {
            const NMPlatformLnkVlan *plnk = &lnk->lnk_vlan;

            g_assert(plnk == nm_platform_link_get_lnk_vlan(NM_PLATFORM_GET, ifindex, NULL));
            g_assert_cmpint(plnk->id, ==, 1242);
            break;
        }
        case NM_LINK_TYPE_VRF:
        {
            const NMPlatformLnkVrf *plnk = &lnk->lnk_vrf;

            g_assert(plnk == nm_platform_link_get_lnk_vrf(NM_PLATFORM_GET, ifindex, NULL));
            g_assert_cmpint(plnk->table, ==, 9876);
            break;
        }
        case NM_LINK_TYPE_VXLAN:
        {
            const NMPlatformLnkVxlan *plnk = &lnk->lnk_vxlan;

            g_assert(plnk == nm_platform_link_get_lnk_vxlan(NM_PLATFORM_GET, ifindex, NULL));
            g_assert_cmpint(plnk->parent_ifindex, !=, 0);
            g_assert_cmpint(plnk->tos, ==, 0);
            g_assert_cmpint(plnk->learning, ==, TRUE);
            g_assert_cmpint(plnk->limit, ==, 0);
            g_assert_cmpint(plnk->proxy, ==, FALSE);
            g_assert_cmpint(plnk->rsc, ==, FALSE);
            g_assert_cmpint(plnk->l2miss, ==, FALSE);
            g_assert_cmpint(plnk->l3miss, ==, FALSE);

            switch (test_data->test_mode) {
            case 0:
                g_assert_cmpint(plnk->id, ==, 42);
                nmtst_assert_ip4_address(plnk->local, "23.1.2.164");
                nmtst_assert_ip4_address(plnk->group, "239.1.2.134");
                nmtst_assert_ip6_address(&plnk->group6, "::");
                nmtst_assert_ip6_address(&plnk->local6, "::");
                g_assert_cmpint(plnk->ttl, ==, 0);
                g_assert_cmpint(plnk->ageing, ==, 1245);
                g_assert_cmpint(plnk->dst_port, ==, 4789);
                if (plnk->src_port_min != 0 || plnk->src_port_max != 0) {
                    /* on some kernels, omitting the port range results in setting
                     * following default port range. */
                    g_assert_cmpint(plnk->src_port_min, ==, 32768);
                    g_assert_cmpint(plnk->src_port_max, ==, 61000);
                }
                break;
            case 1:
                g_assert_cmpint(plnk->id, ==, 11214423);
                nmtst_assert_ip4_address(plnk->local, "0.0.0.0");
                nmtst_assert_ip4_address(plnk->group, "0.0.0.0");
                nmtst_assert_ip6_address(&plnk->group6, "ff0e::115");
                nmtst_assert_ip6_address(&plnk->local6, "1:2:3:4:334:23::23");
                g_assert_cmpint(plnk->ageing, ==, 3245);
                g_assert_cmpint(plnk->dst_port, ==, 57412);
                g_assert_cmpint(plnk->ttl, ==, 32);
                g_assert_cmpint(plnk->src_port_min, ==, 1000);
                g_assert_cmpint(plnk->src_port_max, ==, 1003);
                break;
            }
            break;
        }
        case NM_LINK_TYPE_WIREGUARD:
        {
            const NMPlatformLnkWireGuard *plnk = &lnk->lnk_wireguard;

            g_assert(plnk == nm_platform_link_get_lnk_wireguard(NM_PLATFORM_GET, ifindex, NULL));

            if (plink->n_ifi_flags & IFF_UP) {
                _test_wireguard_change(NM_PLATFORM_GET, plink->ifindex, test_data->test_mode);
                if (_LOGD_ENABLED())
                    _system("WG_HIDE_KEYS=never wg show all");
            }
            break;
        }
        default:
            g_assert_not_reached();
        }
    }

    nmtstp_link_delete(NULL, -1, ifindex, DEVICE_NAME, TRUE);
out_delete_parent:
    nmtstp_link_delete(NULL, -1, ifindex_parent, PARENT_NAME, TRUE);
}

static void
test_software_detect_add(const char *testpath, NMLinkType link_type, int test_mode)
{
    TestAddSoftwareDetectData *test_data;
    char *                     path;

    test_data                   = g_new0(TestAddSoftwareDetectData, 1);
    test_data->link_type        = link_type;
    test_data->test_mode        = test_mode;
    test_data->external_command = TRUE;

    path = g_strdup_printf("%s/external", testpath);
    g_test_add_data_func_full(path, test_data, test_software_detect, g_free);
    g_free(path);

    test_data                   = g_new0(TestAddSoftwareDetectData, 1);
    test_data->link_type        = link_type;
    test_data->test_mode        = test_mode;
    test_data->external_command = FALSE;

    path = g_strdup_printf("%s/platform", testpath);
    g_test_add_data_func_full(path, test_data, test_software_detect, g_free);
    g_free(path);

    test_data                   = g_new0(TestAddSoftwareDetectData, 1);
    test_data->link_type        = link_type;
    test_data->test_mode        = test_mode;
    test_data->external_command = -1;

    path = g_strdup_printf("%s/random", testpath);
    g_test_add_data_func_full(path, test_data, test_software_detect, g_free);
    g_free(path);
}

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

static void
_assert_xgress_qos_mappings_impl(int ifindex, gboolean is_ingress_map, int n_entries, int n, ...)
{
    const NMPlatformLink *  plink;
    const NMPObject *       lnk;
    guint                   n_map;
    const NMVlanQosMapping *map;
    va_list                 ap;
    guint                   i;

    lnk = nm_platform_link_get_lnk(NM_PLATFORM_GET, ifindex, NM_LINK_TYPE_VLAN, &plink);

    g_assert(plink);
    g_assert_cmpint(plink->ifindex, ==, ifindex);
    g_assert(lnk);
    g_assert(&lnk->lnk_vlan == nm_platform_link_get_lnk_vlan(NM_PLATFORM_GET, ifindex, NULL));

    if (nmtst_is_debug())
        nmtstp_run_command_check("ip -d link show %s", plink->name);

    if (is_ingress_map) {
        map   = lnk->_lnk_vlan.ingress_qos_map;
        n_map = lnk->_lnk_vlan.n_ingress_qos_map;
    } else {
        map   = lnk->_lnk_vlan.egress_qos_map;
        n_map = lnk->_lnk_vlan.n_egress_qos_map;
    }

    if (n_entries != -1)
        g_assert_cmpint(n_map, ==, n_entries);

    for (i = 0; i < n_map; i++) {
        if (is_ingress_map) {
            g_assert_cmpint(map[i].from, >=, 0);
            g_assert_cmpint(map[i].from, <=, 7);
        }
        if (i > 0)
            g_assert_cmpint(map[i - 1].from, <, map[i].from);
    }

    va_start(ap, n);
    for (; n > 0; n--) {
        gboolean found = FALSE;
        guint    from  = va_arg(ap, guint);
        guint    to    = va_arg(ap, guint);

        for (i = 0; i < n_map; i++) {
            if (map[i].from == from) {
                g_assert(!found);
                found = TRUE;

                g_assert(map[i].to == to);
            }
        }
        g_assert(found);
    }
    va_end(ap);
}
#define _assert_xgress_qos_mappings(ifindex, is_ingress_map, n_entries, ...)               \
    _assert_xgress_qos_mappings_impl(                                                      \
        (ifindex),                                                                         \
        (is_ingress_map),                                                                  \
        (n_entries),                                                                       \
        (G_STATIC_ASSERT_EXPR((NM_NARG(__VA_ARGS__) % 2) == 0), NM_NARG(__VA_ARGS__) / 2), \
        __VA_ARGS__)
#define _assert_ingress_qos_mappings(ifindex, n_entries, ...) \
    _assert_xgress_qos_mappings(ifindex, TRUE, n_entries, __VA_ARGS__)
#define _assert_egress_qos_mappings(ifindex, n_entries, ...) \
    _assert_xgress_qos_mappings(ifindex, FALSE, n_entries, __VA_ARGS__)

static void
_assert_vlan_flags(int ifindex, NMVlanFlags flags)
{
    const NMPlatformLnkVlan *plnk;

    plnk = nm_platform_link_get_lnk_vlan(NM_PLATFORM_GET, ifindex, NULL);
    g_assert(plnk);
    g_assert_cmpint(plnk->flags, ==, flags);
}

static void
test_vlan_set_xgress(void)
{
    int ifindex, ifindex_parent;

    nmtstp_run_command_check("ip link add %s type dummy", PARENT_NAME);
    ifindex_parent =
        nmtstp_assert_wait_for_link(NM_PLATFORM_GET, PARENT_NAME, NM_LINK_TYPE_DUMMY, 100)->ifindex;

    nmtstp_run_command_check("ip link add name %s link %s type vlan id 1245",
                             DEVICE_NAME,
                             PARENT_NAME);
    ifindex =
        nmtstp_assert_wait_for_link(NM_PLATFORM_GET, DEVICE_NAME, NM_LINK_TYPE_VLAN, 100)->ifindex;

    /* ingress-qos-map */

    g_assert(nm_platform_link_vlan_set_ingress_map(NM_PLATFORM_GET, ifindex, 4, 5));
    _assert_ingress_qos_mappings(ifindex, 1, 4, 5);

    g_assert(nm_platform_link_vlan_set_ingress_map(NM_PLATFORM_GET, ifindex, 3, 7));
    _assert_ingress_qos_mappings(ifindex, 2, 3, 7, 4, 5);

    g_assert(nm_platform_link_vlan_set_ingress_map(NM_PLATFORM_GET, ifindex, 3, 8));
    _assert_ingress_qos_mappings(ifindex, 2, 3, 8, 4, 5);

    g_assert(nm_platform_link_vlan_set_ingress_map(NM_PLATFORM_GET, ifindex, 0, 4));
    _assert_ingress_qos_mappings(ifindex, 3, 0, 4, 3, 8, 4, 5);

    g_assert(nm_platform_link_vlan_set_ingress_map(NM_PLATFORM_GET, ifindex, 0, G_MAXUINT32));
    _assert_ingress_qos_mappings(ifindex, 3, 0, G_MAXUINT32, 3, 8, 4, 5);

    g_assert(nm_platform_link_vlan_set_ingress_map(NM_PLATFORM_GET, ifindex, 0, G_MAXUINT32 - 1));
    _assert_ingress_qos_mappings(ifindex, 3, 0, G_MAXUINT32 - 1, 3, 8, 4, 5);

    g_assert(nm_platform_link_vlan_set_ingress_map(NM_PLATFORM_GET, ifindex, 0, 5));
    _assert_ingress_qos_mappings(ifindex, 3, 0, 5, 3, 8, 4, 5);

    g_assert(nm_platform_link_vlan_set_ingress_map(NM_PLATFORM_GET, ifindex, 0, 5));
    _assert_ingress_qos_mappings(ifindex, 3, 0, 5, 3, 8, 4, 5);

    /* Set invalid values: */
    g_assert(nm_platform_link_vlan_set_ingress_map(NM_PLATFORM_GET, ifindex, 8, 3));
    _assert_ingress_qos_mappings(ifindex, 3, 0, 5, 3, 8, 4, 5);

    g_assert(nm_platform_link_vlan_set_ingress_map(NM_PLATFORM_GET, ifindex, 9, 4));
    _assert_ingress_qos_mappings(ifindex, 3, 0, 5, 3, 8, 4, 5);

    /* egress-qos-map */

    g_assert(nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, ifindex, 7, 3));
    _assert_egress_qos_mappings(ifindex, 1, 7, 3);

    g_assert(nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, ifindex, 8, 4));
    _assert_egress_qos_mappings(ifindex, 2, 7, 3, 8, 4);

    g_assert(nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, ifindex, 0, 4));
    _assert_egress_qos_mappings(ifindex, 3, 0, 4, 7, 3, 8, 4);

    g_assert(nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, ifindex, 1, 4));
    _assert_egress_qos_mappings(ifindex, 4, 0, 4, 1, 4, 7, 3, 8, 4);

    g_assert(nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, ifindex, 1, 5));
    _assert_egress_qos_mappings(ifindex, 4, 0, 4, 1, 5, 7, 3, 8, 4);

    g_assert(nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, ifindex, 9, 5));
    _assert_egress_qos_mappings(ifindex, 5, 0, 4, 1, 5, 7, 3, 8, 4, 9, 5);

    g_assert(nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, ifindex, 8, 5));
    _assert_egress_qos_mappings(ifindex, 5, 0, 4, 1, 5, 7, 3, 8, 5, 9, 5);

    g_assert(nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, ifindex, 8, 0));
    _assert_egress_qos_mappings(ifindex, 4, 0, 4, 1, 5, 7, 3, 9, 5);

    g_assert(nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, ifindex, 0, 0));
    _assert_egress_qos_mappings(ifindex, 3, 1, 5, 7, 3, 9, 5);

    g_assert(nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, ifindex, 100, 4));
    _assert_egress_qos_mappings(ifindex, 4, 1, 5, 7, 3, 9, 5, 100, 4);

    g_assert(nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, ifindex, G_MAXUINT32, 4));
    _assert_egress_qos_mappings(ifindex, 5, 1, 5, 7, 3, 9, 5, 100, 4, G_MAXUINT32, 4);

    g_assert(nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, ifindex, G_MAXUINT32, 8));
    _assert_egress_qos_mappings(ifindex, 5, 1, 5, 7, 3, 9, 5, 100, 4, G_MAXUINT32, 4);

    g_assert(nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, ifindex, G_MAXUINT32, 0));
    _assert_egress_qos_mappings(ifindex, 4, 1, 5, 7, 3, 9, 5, 100, 4);

    g_assert(nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, ifindex, 100, 0));
    _assert_egress_qos_mappings(ifindex, 3, 1, 5, 7, 3, 9, 5);

    g_assert(nm_platform_link_vlan_set_egress_map(NM_PLATFORM_GET, ifindex, 1, 0));
    _assert_egress_qos_mappings(ifindex, 2, 7, 3, 9, 5);

    {
        const NMVlanQosMapping ingress_map[] = {
            {.from = 1, .to = 5},
        };

        g_assert(nm_platform_link_vlan_change(NM_PLATFORM_GET,
                                              ifindex,
                                              0,
                                              0,
                                              TRUE,
                                              ingress_map,
                                              G_N_ELEMENTS(ingress_map),
                                              FALSE,
                                              NULL,
                                              0));
        _assert_ingress_qos_mappings(ifindex, 1, 1, 5);
    }

    {
        const NMVlanQosMapping ingress_map[] = {
            {.from = 3, .to = 5},
            {.from = 7, .to = 1655},
            {.from = 7, .to = 17655},
            {.from = 5, .to = 754},
            {.from = 4, .to = 12},
        };

        g_assert(nm_platform_link_vlan_change(NM_PLATFORM_GET,
                                              ifindex,
                                              0,
                                              0,
                                              TRUE,
                                              ingress_map,
                                              G_N_ELEMENTS(ingress_map),
                                              FALSE,
                                              NULL,
                                              0));
        _assert_ingress_qos_mappings(ifindex, 4, 3, 5, 4, 12, 7, 17655, 5, 754);
    }

    {
        const NMVlanQosMapping ingress_map[] = {
            {.from = 3, .to = 18},
            {.from = 6, .to = 121},
        };

        g_assert(nm_platform_link_vlan_change(NM_PLATFORM_GET,
                                              ifindex,
                                              0,
                                              0,
                                              FALSE,
                                              ingress_map,
                                              G_N_ELEMENTS(ingress_map),
                                              FALSE,
                                              NULL,
                                              0));
        _assert_ingress_qos_mappings(ifindex, 5, 3, 18, 4, 12, 6, 121, 7, 17655, 5, 754);
    }

    {
        const NMVlanQosMapping ingress_map[] = {
            {.from = 3, .to = 0},
            {.from = 6, .to = 7},
        };

        g_assert(nm_platform_link_vlan_change(NM_PLATFORM_GET,
                                              ifindex,
                                              0,
                                              0,
                                              TRUE,
                                              ingress_map,
                                              G_N_ELEMENTS(ingress_map),
                                              FALSE,
                                              NULL,
                                              0));
        _assert_ingress_qos_mappings(ifindex, 1, 6, 7);
    }

    {
        const NMVlanQosMapping ingress_map[] = {
            {.from = 1, .to = 5},
        };

        g_assert(nm_platform_link_vlan_change(NM_PLATFORM_GET,
                                              ifindex,
                                              0,
                                              0,
                                              TRUE,
                                              ingress_map,
                                              G_N_ELEMENTS(ingress_map),
                                              FALSE,
                                              NULL,
                                              0));
        _assert_ingress_qos_mappings(ifindex, 1, 1, 5);
    }

    {
        const NMVlanQosMapping egress_map[] = {
            {.from = 5, .to = 1},
        };

        g_assert(nm_platform_link_vlan_change(NM_PLATFORM_GET,
                                              ifindex,
                                              0,
                                              0,
                                              FALSE,
                                              NULL,
                                              0,
                                              TRUE,
                                              egress_map,
                                              G_N_ELEMENTS(egress_map)));
        _assert_egress_qos_mappings(ifindex, 1, 5, 1);
    }

    {
        const NMVlanQosMapping egress_map[] = {
            {.from = 5, .to = 3},
            {.from = 1655, .to = 5},
            {.from = 1655, .to = 7},
            {.from = G_MAXUINT32, .to = 6},
            {.from = G_MAXUINT32, .to = 8},
            {.from = 754, .to = 4},
            {.from = 3, .to = 2},
        };

        g_assert(nm_platform_link_vlan_change(NM_PLATFORM_GET,
                                              ifindex,
                                              0,
                                              0,
                                              FALSE,
                                              NULL,
                                              0,
                                              TRUE,
                                              egress_map,
                                              G_N_ELEMENTS(egress_map)));
        _assert_egress_qos_mappings(ifindex, 5, 3, 2, 5, 3, 754, 4, 1655, 7, G_MAXUINT32, 6);
    }

    {
        const NMVlanQosMapping egress_map[] = {
            {.from = 754, .to = 3},
            {.from = 755, .to = 8},
            {.from = 1655, .to = 0},
            {.from = 6, .to = 1},
        };

        g_assert(nm_platform_link_vlan_change(NM_PLATFORM_GET,
                                              ifindex,
                                              0,
                                              0,
                                              FALSE,
                                              NULL,
                                              0,
                                              FALSE,
                                              egress_map,
                                              G_N_ELEMENTS(egress_map)));
        _assert_egress_qos_mappings(ifindex, 5, 3, 2, 5, 3, 6, 1, 754, 3, G_MAXUINT32, 6);
    }

    {
        const NMVlanQosMapping egress_map[] = {
            {.from = 6, .to = 0},
            {.from = 3, .to = 4},
        };

        g_assert(nm_platform_link_vlan_change(NM_PLATFORM_GET,
                                              ifindex,
                                              0,
                                              0,
                                              FALSE,
                                              NULL,
                                              0,
                                              TRUE,
                                              egress_map,
                                              G_N_ELEMENTS(egress_map)));
        _assert_egress_qos_mappings(ifindex, 1, 3, 4);
    }

    {
        const NMVlanQosMapping egress_map[] = {
            {.from = 1, .to = 5},
        };

        g_assert(nm_platform_link_vlan_change(NM_PLATFORM_GET,
                                              ifindex,
                                              0,
                                              0,
                                              FALSE,
                                              NULL,
                                              0,
                                              TRUE,
                                              egress_map,
                                              G_N_ELEMENTS(egress_map)));
        _assert_egress_qos_mappings(ifindex, 1, 1, 5);
    }

    {
        const NMVlanQosMapping ingress_map[] = {
            {.from = 6, .to = 145},
            {.from = 4, .to = 1},
            {.from = 6, .to = 12},
        };
        const NMVlanQosMapping egress_map[] = {
            {.from = 1, .to = 5},
            {.from = 3232, .to = 7},
        };

        g_assert(nm_platform_link_vlan_change(NM_PLATFORM_GET,
                                              ifindex,
                                              NM_VLAN_FLAG_REORDER_HEADERS | NM_VLAN_FLAG_GVRP,
                                              NM_VLAN_FLAG_REORDER_HEADERS,
                                              TRUE,
                                              ingress_map,
                                              G_N_ELEMENTS(ingress_map),
                                              TRUE,
                                              egress_map,
                                              G_N_ELEMENTS(egress_map)));
        _assert_ingress_qos_mappings(ifindex, 2, 4, 1, 6, 12);
        _assert_egress_qos_mappings(ifindex, 2, 1, 5, 3232, 7);
        _assert_vlan_flags(ifindex, NM_VLAN_FLAG_REORDER_HEADERS);
    }

    {
        const NMVlanQosMapping ingress_map[] = {
            {.from = 6, .to = 145},
            {.from = 4, .to = 1},
            {.from = 6, .to = 12},
        };
        const NMVlanQosMapping egress_map[] = {
            {.from = 1, .to = 7},
            {.from = 64, .to = 10},
            {.from = 64, .to = 10},
            {.from = 64, .to = 10},
            {.from = 64, .to = 10},
            {.from = 3232, .to = 0},
            {.from = 64, .to = 4},
        };

        g_assert(nm_platform_link_vlan_change(NM_PLATFORM_GET,
                                              ifindex,
                                              NM_VLAN_FLAG_GVRP,
                                              NM_VLAN_FLAG_GVRP,
                                              FALSE,
                                              ingress_map,
                                              G_N_ELEMENTS(ingress_map),
                                              FALSE,
                                              egress_map,
                                              G_N_ELEMENTS(egress_map)));
        _assert_ingress_qos_mappings(ifindex, 2, 4, 1, 6, 12);
        _assert_egress_qos_mappings(ifindex, 2, 1, 7, 64, 4);
        _assert_vlan_flags(ifindex, NM_VLAN_FLAG_REORDER_HEADERS | NM_VLAN_FLAG_GVRP);
    }

    nmtstp_link_delete(NULL, -1, ifindex, DEVICE_NAME, TRUE);
    nmtstp_link_delete(NULL, -1, ifindex_parent, PARENT_NAME, TRUE);
}

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

static void
test_create_many_links_do(guint n_devices)
{
    gint64                time, start_time = nm_utils_get_monotonic_timestamp_nsec();
    guint                 i;
    char                  name[64];
    const NMPlatformLink *pllink;
    gs_unref_array GArray *ifindexes = g_array_sized_new(FALSE, FALSE, sizeof(int), n_devices);
    const int              EX        = ((int) (nmtst_get_rand_uint32() % 4)) - 1;

    g_assert(EX >= -1 && EX <= 2);

    _LOGI(">>> create devices (EX=%d)...", EX);

    for (i = 0; i < n_devices; i++) {
        nm_sprintf_buf(name, "t-%05u", i);
        if (EX == 2) {
            /* This mode is different from letting nmtstp_link_dummy_add()
             * because in this case we don't process any platform events
             * while adding all the links. */
            nmtstp_run_command_check("ip link add %s type dummy", name);
        } else
            nmtstp_link_dummy_add(NULL, EX, name);
    }

    _LOGI(">>> process events after creating devices...");

    nm_platform_process_events(NM_PLATFORM_GET);

    _LOGI(">>> check devices...");

    for (i = 0; i < n_devices; i++) {
        nm_sprintf_buf(name, "t-%05u", i);

        pllink = nm_platform_link_get_by_ifname(NM_PLATFORM_GET, name);
        g_assert(pllink);
        g_assert_cmpint(pllink->type, ==, NM_LINK_TYPE_DUMMY);
        g_assert_cmpstr(pllink->name, ==, name);

        g_array_append_val(ifindexes, pllink->ifindex);
    }

    _LOGI(">>> delete devices...");

    g_assert_cmpint(ifindexes->len, ==, n_devices);
    for (i = 0; i < n_devices; i++) {
        nm_sprintf_buf(name, "t-%05u", i);

        if (EX == 2)
            nmtstp_run_command_check("ip link delete %s", name);
        else
            nmtstp_link_delete(NULL, EX, g_array_index(ifindexes, int, i), name, TRUE);
    }

    _LOGI(">>> process events after deleting devices...");
    nm_platform_process_events(NM_PLATFORM_GET);

    time = nm_utils_get_monotonic_timestamp_nsec() - start_time;
    _LOGI(">>> finished in %ld.%09ld seconds",
          (long) (time / NM_UTILS_NSEC_PER_SEC),
          (long) (time % NM_UTILS_NSEC_PER_SEC));
}

static void
test_create_many_links(gconstpointer user_data)
{
    guint n_devices = GPOINTER_TO_UINT(user_data);

    if (n_devices > 100 && nmtst_test_quick()) {
        g_print("Skipping test: don't run long running test %s (NMTST_DEBUG=slow)\n",
                g_get_prgname() ?: "test-link-linux");
        g_test_skip("Skip long running test");
        return;
    }

    test_create_many_links_do(n_devices);
}

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

static void
test_nl_bugs_veth(void)
{
    const char *          IFACE_VETH0 = "nm-test-veth0";
    const char *          IFACE_VETH1 = "nm-test-veth1";
    int                   ifindex_veth0, ifindex_veth1;
    int                   i;
    const NMPlatformLink *pllink_veth0, *pllink_veth1;
    gs_free_error GError * error     = NULL;
    NMTstpNamespaceHandle *ns_handle = NULL;

    /* create veth pair. */
    ifindex_veth0 = nmtstp_link_veth_add(NM_PLATFORM_GET, -1, IFACE_VETH0, IFACE_VETH1)->ifindex;
    ifindex_veth1 =
        nmtstp_link_get_typed(NM_PLATFORM_GET, -1, IFACE_VETH1, NM_LINK_TYPE_VETH)->ifindex;

    /* assert that nm_platform_link_veth_get_properties() returns the expected peer ifindexes. */
    g_assert(nm_platform_link_veth_get_properties(NM_PLATFORM_GET, ifindex_veth0, &i));
    g_assert_cmpint(i, ==, ifindex_veth1);

    g_assert(nm_platform_link_veth_get_properties(NM_PLATFORM_GET, ifindex_veth1, &i));
    g_assert_cmpint(i, ==, ifindex_veth0);

    /* assert that NMPlatformLink.parent is the peer-ifindex. */
    pllink_veth0 = nm_platform_link_get(NM_PLATFORM_GET, ifindex_veth0);
    g_assert(pllink_veth0);
    if (pllink_veth0->parent == 0) {
        /* Kernels prior to 4.1 dated 21 June, 2015 don't support exposing the veth peer
         * as IFA_LINK. skip the remainder of the test. */
        goto out;
    }
    g_assert_cmpint(pllink_veth0->parent, ==, ifindex_veth1);

    /* The following tests whether we have a workaround for kernel bug
     * https://bugzilla.redhat.com/show_bug.cgi?id=1285827 in place. */
    pllink_veth1 = nm_platform_link_get(NM_PLATFORM_GET, ifindex_veth1);
    g_assert(pllink_veth1);
    g_assert_cmpint(pllink_veth1->parent, ==, ifindex_veth0);

    /* move one veth peer to another namespace and check that the
     * parent/IFLA_LINK of the remaining peer properly updates
     * (https://bugzilla.redhat.com/show_bug.cgi?id=1262908). */
    ns_handle = nmtstp_namespace_create(CLONE_NEWNET, &error);
    g_assert_no_error(error);
    g_assert(ns_handle);

    nmtstp_run_command_check("ip link set %s netns %ld",
                             IFACE_VETH1,
                             (long) nmtstp_namespace_handle_get_pid(ns_handle));
    NMTST_WAIT_ASSERT(100, {
        nmtstp_wait_for_signal(NM_PLATFORM_GET, 50);
        nm_platform_process_events(NM_PLATFORM_GET);

        pllink_veth1 = nm_platform_link_get(NM_PLATFORM_GET, ifindex_veth1);
        pllink_veth0 = nm_platform_link_get(NM_PLATFORM_GET, ifindex_veth0);
        if (!pllink_veth1 && pllink_veth0 && pllink_veth0->parent == NM_PLATFORM_LINK_OTHER_NETNS) {
            break;
        }
    });

out:
    nmtstp_link_delete(NULL, -1, ifindex_veth0, IFACE_VETH0, TRUE);
    g_assert(!nmtstp_link_get(NM_PLATFORM_GET, ifindex_veth0, IFACE_VETH0));
    g_assert(!nmtstp_link_get(NM_PLATFORM_GET, ifindex_veth1, IFACE_VETH1));
    nmtstp_namespace_handle_release(ns_handle);
}

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

static void
test_nl_bugs_spuroius_newlink(void)
{
    const char *          IFACE_BOND0  = "nm-test-bond0";
    const char *          IFACE_DUMMY0 = "nm-test-dummy0";
    int                   ifindex_bond0, ifindex_dummy0;
    const NMPlatformLink *pllink;
    gboolean              wait_for_settle;

    /* see https://bugzilla.redhat.com/show_bug.cgi?id=1285719 */

    nmtstp_run_command_check("ip link add %s type dummy", IFACE_DUMMY0);
    ifindex_dummy0 =
        nmtstp_assert_wait_for_link(NM_PLATFORM_GET, IFACE_DUMMY0, NM_LINK_TYPE_DUMMY, 100)
            ->ifindex;

    nmtstp_run_command_check("ip link add %s type bond", IFACE_BOND0);
    ifindex_bond0 =
        nmtstp_assert_wait_for_link(NM_PLATFORM_GET, IFACE_BOND0, NM_LINK_TYPE_BOND, 100)->ifindex;

    nmtstp_link_set_updown(NULL, -1, ifindex_bond0, TRUE);

    nmtstp_run_command_check("ip link set %s master %s", IFACE_DUMMY0, IFACE_BOND0);
    NMTST_WAIT_ASSERT(100, {
        nmtstp_wait_for_signal(NM_PLATFORM_GET, 50);

        pllink = nm_platform_link_get(NM_PLATFORM_GET, ifindex_dummy0);
        g_assert(pllink);
        if (pllink->master == ifindex_bond0)
            break;
    });

    nmtstp_run_command_check("ip link del %s", IFACE_BOND0);

    wait_for_settle = TRUE;
    nmtstp_wait_for_signal(NM_PLATFORM_GET, 50);
again:
    nm_platform_process_events(NM_PLATFORM_GET);
    pllink = nm_platform_link_get(NM_PLATFORM_GET, ifindex_bond0);
    g_assert(!pllink);

    if (wait_for_settle) {
        wait_for_settle = FALSE;
        NMTST_WAIT(300, { nmtstp_wait_for_signal(NM_PLATFORM_GET, 50); });
        goto again;
    }

    g_assert(!nmtstp_link_get(NM_PLATFORM_GET, ifindex_bond0, IFACE_BOND0));
    nmtstp_link_delete(NULL, -1, ifindex_dummy0, IFACE_DUMMY0, TRUE);
}

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

static void
test_nl_bugs_spuroius_dellink(void)
{
    const char *          IFACE_BRIDGE0 = "nm-test-bridge0";
    const char *          IFACE_DUMMY0  = "nm-test-dummy0";
    int                   ifindex_bridge0, ifindex_dummy0;
    const NMPlatformLink *pllink;
    gboolean              wait_for_settle;

    /* see https://bugzilla.redhat.com/show_bug.cgi?id=1285719 */

    nmtstp_run_command_check("ip link add %s type dummy", IFACE_DUMMY0);
    ifindex_dummy0 =
        nmtstp_assert_wait_for_link(NM_PLATFORM_GET, IFACE_DUMMY0, NM_LINK_TYPE_DUMMY, 100)
            ->ifindex;

    nmtstp_run_command_check("ip link add %s type bridge", IFACE_BRIDGE0);
    ifindex_bridge0 =
        nmtstp_assert_wait_for_link(NM_PLATFORM_GET, IFACE_BRIDGE0, NM_LINK_TYPE_BRIDGE, 100)
            ->ifindex;

    nmtstp_link_set_updown(NULL, -1, ifindex_bridge0, TRUE);

    nmtstp_run_command_check("ip link set %s master %s", IFACE_DUMMY0, IFACE_BRIDGE0);
    NMTST_WAIT_ASSERT(100, {
        nmtstp_wait_for_signal(NM_PLATFORM_GET, 50);

        pllink = nm_platform_link_get(NM_PLATFORM_GET, ifindex_dummy0);
        g_assert(pllink);
        if (pllink->master == ifindex_bridge0)
            break;
    });

    nm_platform_process_events(NM_PLATFORM_GET);

    nmtstp_run_command_check("ip link set %s nomaster", IFACE_DUMMY0);

    wait_for_settle = TRUE;
    nmtstp_wait_for_signal(NM_PLATFORM_GET, 50);
again:
    nm_platform_process_events(NM_PLATFORM_GET);
    pllink = nm_platform_link_get(NM_PLATFORM_GET, ifindex_bridge0);
    g_assert(pllink);
    pllink = nm_platform_link_get(NM_PLATFORM_GET, ifindex_dummy0);
    g_assert(pllink);
    g_assert_cmpint(pllink->parent, ==, 0);

    if (wait_for_settle) {
        wait_for_settle = FALSE;
        NMTST_WAIT(300, { nmtstp_wait_for_signal(NM_PLATFORM_GET, 50); });
        goto again;
    }

    nmtstp_link_delete(NULL, -1, ifindex_bridge0, IFACE_BRIDGE0, TRUE);
    nmtstp_link_delete(NULL, -1, ifindex_dummy0, IFACE_DUMMY0, TRUE);
}

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

static void
_test_netns_setup(gpointer fixture, gconstpointer test_data)
{
    /* the singleton platform instance has netns support disabled.
     * Destroy the instance before the test and re-create it afterwards. */
    g_object_unref(NM_PLATFORM_GET);
}

static void
_test_netns_teardown(gpointer fixture, gconstpointer test_data)
{
    nmtstp_setup_platform();
}

static NMPlatform *
_test_netns_create_platform(void)
{
    NMPNetns *  netns;
    NMPlatform *platform;

    netns = nmp_netns_new();
    g_assert(NMP_IS_NETNS(netns));

    platform = nm_linux_platform_new(TRUE, TRUE);
    g_assert(NM_IS_LINUX_PLATFORM(platform));

    nmp_netns_pop(netns);
    g_object_unref(netns);

    return platform;
}

static gboolean
_test_netns_check_skip(void)
{
    static int      support       = -1;
    static int      support_errsv = 0;
    NMPNetns *      netns;
    gs_unref_object NMPNetns *netns2 = NULL;

    netns = nmp_netns_get_current();
    if (!netns) {
        g_test_skip("No netns support");
        return TRUE;
    }

    g_assert(nmp_netns_get_fd_net(netns) > 0);

    if (support == -1) {
        support = (setns(nmp_netns_get_fd_net(netns), CLONE_NEWNET) == 0);
        if (!support)
            support_errsv = errno;
    }
    if (!support) {
        _LOGD("setns() failed with \"%s\". This indicates missing support (valgrind?)",
              nm_strerror_native(support_errsv));
        g_test_skip("No netns support (setns failed)");
        return TRUE;
    }

    netns2 = nmp_netns_new();
    if (!netns2) {
        /* skip tests for https://bugzilla.gnome.org/show_bug.cgi?id=790214 */
        g_assert_cmpint(errno, ==, EINVAL);
        g_test_skip("No netns support to create another netns");
        return TRUE;
    }
    nmp_netns_pop(netns2);

    return FALSE;
}

static gboolean
_check_sysctl_skip(void)
{
    if (access("/proc/sys/net/ipv4/ip_forward", W_OK) == -1) {
        g_test_skip("Can not write sysctls");
        return TRUE;
    }

    return FALSE;
}

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

#define _sysctl_assert_eq(plat, path, value)                                   \
    G_STMT_START                                                               \
    {                                                                          \
        gs_free char *_val = NULL;                                             \
                                                                               \
        _val = nm_platform_sysctl_get(plat, NMP_SYSCTL_PATHID_ABSOLUTE(path)); \
        g_assert_cmpstr(_val, ==, value);                                      \
    }                                                                          \
    G_STMT_END

static void
test_netns_general(gpointer fixture, gconstpointer test_data)
{
    gs_unref_object NMPlatform *platform_1 = NULL;
    gs_unref_object NMPlatform *platform_2 = NULL;
    NMPNetns *                  netns_tmp;
    char                        sbuf[100];
    int                         i, j, k;
    gboolean                    ethtool_support;
    NMPUtilsEthtoolDriverInfo   driver_info;

    if (_test_netns_check_skip())
        return;

    if (_check_sysctl_skip())
        return;

    platform_1 = nm_linux_platform_new(TRUE, TRUE);
    platform_2 = _test_netns_create_platform();

    /* add some dummy devices. The "other-*" devices are there to bump the ifindex */
    for (k = 0; k < 2; k++) {
        NMPlatform *p  = (k == 0 ? platform_1 : platform_2);
        const char *id = (k == 0 ? "a" : "b");

        for (i = 0, j = nmtst_get_rand_uint32() % 5; i < j; i++)
            _ADD_DUMMY(p, nm_sprintf_buf(sbuf, "other-a-%s-%02d", id, i));

        _ADD_DUMMY(p, "dummy1_");

        for (i = 0, j = nmtst_get_rand_uint32() % 5; i < j; i++)
            _ADD_DUMMY(p, nm_sprintf_buf(sbuf, "other-b-%s-%02d", id, i));

        _ADD_DUMMY(p, nm_sprintf_buf(sbuf, "dummy2%s", id));

        for (i = 0, j = nmtst_get_rand_uint32() % 5; i < j; i++)
            _ADD_DUMMY(p, nm_sprintf_buf(sbuf, "other-c-%s-%02d", id, i));
    }

    _sysctl_assert_eq(
        platform_1,
        "/sys/devices/virtual/net/dummy1_/ifindex",
        nm_sprintf_buf(
            sbuf,
            "%d",
            nmtstp_link_get_typed(platform_1, 0, "dummy1_", NM_LINK_TYPE_DUMMY)->ifindex));
    _sysctl_assert_eq(
        platform_1,
        "/sys/devices/virtual/net/dummy2a/ifindex",
        nm_sprintf_buf(
            sbuf,
            "%d",
            nmtstp_link_get_typed(platform_1, 0, "dummy2a", NM_LINK_TYPE_DUMMY)->ifindex));
    _sysctl_assert_eq(platform_1, "/sys/devices/virtual/net/dummy2b/ifindex", NULL);

    _sysctl_assert_eq(
        platform_2,
        "/sys/devices/virtual/net/dummy1_/ifindex",
        nm_sprintf_buf(
            sbuf,
            "%d",
            nmtstp_link_get_typed(platform_2, 0, "dummy1_", NM_LINK_TYPE_DUMMY)->ifindex));
    _sysctl_assert_eq(platform_2, "/sys/devices/virtual/net/dummy2a/ifindex", NULL);
    _sysctl_assert_eq(
        platform_2,
        "/sys/devices/virtual/net/dummy2b/ifindex",
        nm_sprintf_buf(
            sbuf,
            "%d",
            nmtstp_link_get_typed(platform_2, 0, "dummy2b", NM_LINK_TYPE_DUMMY)->ifindex));

    for (i = 0; i < 10; i++) {
        NMPlatform *pl;
        const char *path;

        j = nmtst_get_rand_uint32() % 2;

        if (nmtst_get_rand_uint32() % 2) {
            pl = platform_1;
            if (nmtst_get_rand_uint32() % 2)
                path = "/proc/sys/net/ipv6/conf/dummy1_/disable_ipv6";
            else
                path = "/proc/sys/net/ipv6/conf/dummy2a/disable_ipv6";
        } else {
            pl = platform_2;
            if (nmtst_get_rand_uint32() % 2)
                path = "/proc/sys/net/ipv6/conf/dummy1_/disable_ipv6";
            else
                path = "/proc/sys/net/ipv6/conf/dummy2b/disable_ipv6";
        }
        g_assert(nm_platform_sysctl_set(pl,
                                        NMP_SYSCTL_PATHID_ABSOLUTE(path),
                                        nm_sprintf_buf(sbuf, "%d", j)));
        _sysctl_assert_eq(pl, path, nm_sprintf_buf(sbuf, "%d", j));
    }

    _sysctl_assert_eq(platform_1, "/proc/sys/net/ipv6/conf/dummy2b/disable_ipv6", NULL);
    _sysctl_assert_eq(platform_2, "/proc/sys/net/ipv6/conf/dummy2a/disable_ipv6", NULL);

    /* Kernels prior to 3.19 dated 8 February, 2015 don't support ethtool -i for dummy devices.
     * Work around that and skip asserts that are known to fail. */
    ethtool_support = nmtstp_run_command("ethtool -i dummy1_ > /dev/null") == 0;
    if (ethtool_support) {
        g_assert(nmp_utils_ethtool_get_driver_info(
            nmtstp_link_get_typed(platform_1, 0, "dummy1_", NM_LINK_TYPE_DUMMY)->ifindex,
            &driver_info));
        g_assert(nmp_utils_ethtool_get_driver_info(
            nmtstp_link_get_typed(platform_1, 0, "dummy2a", NM_LINK_TYPE_DUMMY)->ifindex,
            &driver_info));
        g_assert_cmpint(nmtstp_run_command("ethtool -i dummy1_ > /dev/null"), ==, 0);
        g_assert_cmpint(nmtstp_run_command("ethtool -i dummy2a > /dev/null"), ==, 0);
        g_assert_cmpint(nmtstp_run_command("ethtool -i dummy2b 2> /dev/null"), !=, 0);
    }

    g_assert(nm_platform_netns_push(platform_2, &netns_tmp));

    if (ethtool_support) {
        g_assert(nmp_utils_ethtool_get_driver_info(
            nmtstp_link_get_typed(platform_2, 0, "dummy1_", NM_LINK_TYPE_DUMMY)->ifindex,
            &driver_info));
        g_assert(nmp_utils_ethtool_get_driver_info(
            nmtstp_link_get_typed(platform_2, 0, "dummy2b", NM_LINK_TYPE_DUMMY)->ifindex,
            &driver_info));
        g_assert_cmpint(nmtstp_run_command("ethtool -i dummy1_ > /dev/null"), ==, 0);
        g_assert_cmpint(nmtstp_run_command("ethtool -i dummy2a 2> /dev/null"), !=, 0);
        g_assert_cmpint(nmtstp_run_command("ethtool -i dummy2b > /dev/null"), ==, 0);
    }

    nmp_netns_pop(netns_tmp);
}

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

static void
test_netns_set_netns(gpointer fixture, gconstpointer test_data)
{
    NMPlatform *    platforms[3];
    gs_unref_object NMPlatform *platform_0 = NULL;
    gs_unref_object NMPlatform *platform_1 = NULL;
    gs_unref_object NMPlatform *platform_2 = NULL;
    nm_auto_pop_netns NMPNetns *netns_pop  = NULL;

    if (_test_netns_check_skip())
        return;

    platforms[0] = platform_0 = nm_linux_platform_new(TRUE, TRUE);
    platforms[1] = platform_1 = _test_netns_create_platform();
    platforms[2] = platform_2 = _test_netns_create_platform();

    nmtstp_netns_select_random(platforms, G_N_ELEMENTS(platforms), &netns_pop);

#define LINK_MOVE_NAME "link-move"
    g_assert(!nm_platform_link_get_by_ifname(platform_1, LINK_MOVE_NAME));
    g_assert(!nm_platform_link_get_by_ifname(platform_2, LINK_MOVE_NAME));
    _ADD_DUMMY(platform_1, LINK_MOVE_NAME);
    g_assert(nm_platform_link_get_by_ifname(platform_1, LINK_MOVE_NAME));
    g_assert(!nm_platform_link_get_by_ifname(platform_2, LINK_MOVE_NAME));
    g_assert(nm_platform_link_set_netns(
        platform_1,
        nm_platform_link_get_by_ifname(platform_1, LINK_MOVE_NAME)->ifindex,
        nmp_netns_get_fd_net(nm_platform_netns_get(platform_2))));
    g_assert(!nm_platform_link_get_by_ifname(platform_1, LINK_MOVE_NAME));
    g_assert(!nm_platform_link_get_by_ifname(platform_2, LINK_MOVE_NAME));
    nmtstp_assert_wait_for_link(platform_2, LINK_MOVE_NAME, NM_LINK_TYPE_DUMMY, 100);
    g_assert(!nm_platform_link_get_by_ifname(platform_1, LINK_MOVE_NAME));
    g_assert(nm_platform_link_get_by_ifname(platform_2, LINK_MOVE_NAME));
}

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

static char *
_get_current_namespace_id(int ns_type)
{
    const char *p;
    GError *    error = NULL;
    char *      id;

    switch (ns_type) {
    case CLONE_NEWNET:
        p = "/proc/self/ns/net";
        break;
    case CLONE_NEWNS:
        p = "/proc/self/ns/mnt";
        break;
    default:
        g_assert_not_reached();
    }

    id = g_file_read_link(p, &error);
    g_assert_no_error(error);
    g_assert(id);
    return id;
}

static char *
_get_sysctl_value(const char *path)
{
    char *        data          = NULL;
    gs_free_error GError *error = NULL;

    if (!g_file_get_contents(path, &data, NULL, &error)) {
        nmtst_assert_error(error, G_FILE_ERROR, G_FILE_ERROR_NOENT, NULL);
        g_assert(!data);
    } else {
        g_assert_no_error(error);
        g_assert(data);
        g_strstrip(data);
    }
    return data;
}

static void
test_netns_push(gpointer fixture, gconstpointer test_data)
{
    gs_unref_object NMPlatform *platform_0    = NULL;
    gs_unref_object NMPlatform *platform_1    = NULL;
    gs_unref_object NMPlatform *platform_2    = NULL;
    nm_auto_pop_netns NMPNetns *netns_pop     = NULL;
    gs_unref_ptrarray GPtrArray *device_names = g_ptr_array_new_with_free_func(g_free);
    int                          i, j;
    const int ns_types_list[] = {CLONE_NEWNET, CLONE_NEWNS, CLONE_NEWNET | CLONE_NEWNS};
    const int ns_types_test[] = {CLONE_NEWNET, CLONE_NEWNS};
    typedef struct {
        NMPlatform *platform;
        const char *device_name;
        const char *sysctl_path;
        const char *sysctl_value;
        const char *ns_net;
        const char *ns_mnt;
    } PlatformData;
    PlatformData  pl[3] = {};
    PlatformData *pl_base;
    struct {
        PlatformData *pl;
        int           ns_types;
    } stack[6] = {};
    int nstack;

    if (_test_netns_check_skip())
        return;

    if (_check_sysctl_skip())
        return;

    pl[0].platform = platform_0 = nm_linux_platform_new(TRUE, TRUE);
    pl[1].platform = platform_1 = _test_netns_create_platform();
    pl[2].platform = platform_2 = _test_netns_create_platform();

    pl_base = &pl[0];
    i       = nmtst_get_rand_uint32() % (G_N_ELEMENTS(pl) + 1);
    if (i < G_N_ELEMENTS(pl)) {
        pl_base = &pl[i];
        g_assert(nm_platform_netns_push(pl[i].platform, &netns_pop));
    }

    for (i = 0; i < G_N_ELEMENTS(pl); i++) {
        nm_auto_pop_netns NMPNetns *netns_free = NULL;
        char *                      tmp;

        g_assert(nm_platform_netns_push(pl[i].platform, &netns_free));

        tmp = g_strdup_printf("nmtst-dev-%d", i);
        g_ptr_array_add(device_names, tmp);
        pl[i].device_name = tmp;

        tmp = g_strdup_printf("/proc/sys/net/ipv6/conf/%s/disable_ipv6", pl[i].device_name);
        g_ptr_array_add(device_names, tmp);
        pl[i].sysctl_path = tmp;

        pl[i].sysctl_value = nmtst_get_rand_uint32() % 2 ? "1" : "0";

        _ADD_DUMMY(pl[i].platform, pl[i].device_name);

        g_assert(nm_platform_sysctl_set(pl[i].platform,
                                        NMP_SYSCTL_PATHID_ABSOLUTE(pl[i].sysctl_path),
                                        pl[i].sysctl_value));

        tmp = _get_current_namespace_id(CLONE_NEWNET);
        g_ptr_array_add(device_names, tmp);
        pl[i].ns_net = tmp;

        tmp = _get_current_namespace_id(CLONE_NEWNS);
        g_ptr_array_add(device_names, tmp);
        pl[i].ns_mnt = tmp;
    }

    nstack = nmtst_get_rand_uint32() % (G_N_ELEMENTS(stack) + 1);
    for (i = 0; i < nstack; i++) {
        stack[i].pl       = &pl[nmtst_get_rand_uint32() % G_N_ELEMENTS(pl)];
        stack[i].ns_types = ns_types_list[nmtst_get_rand_uint32() % G_N_ELEMENTS(ns_types_list)];

        nmp_netns_push_type(nm_platform_netns_get(stack[i].pl->platform), stack[i].ns_types);
    }

    /* pop some again. */
    for (i = nmtst_get_rand_uint32() % (nstack + 1); i > 0; i--) {
        g_assert(nstack > 0);
        nstack--;
        nmp_netns_pop(nm_platform_netns_get(stack[nstack].pl->platform));
    }

    for (i = 0; i < G_N_ELEMENTS(ns_types_test); i++) {
        int           ns_type = ns_types_test[i];
        PlatformData *p;
        gs_free char *current_namespace_id = NULL;

        p = pl_base;
        for (j = nstack; j >= 1;) {
            j--;
            if (NM_FLAGS_ANY(stack[j].ns_types, ns_type)) {
                p = stack[j].pl;
                break;
            }
        }

        current_namespace_id = _get_current_namespace_id(ns_type);

        if (ns_type == CLONE_NEWNET) {
            g_assert_cmpstr(current_namespace_id, ==, p->ns_net);
            for (j = 0; j < G_N_ELEMENTS(pl); j++) {
                gs_free char *data = NULL;

                if (p == &pl[j])
                    g_assert_cmpint(
                        nmtstp_run_command("ip link show %s 1>/dev/null", pl[j].device_name),
                        ==,
                        0);
                else
                    g_assert_cmpint(
                        nmtstp_run_command("ip link show %s 2>/dev/null", pl[j].device_name),
                        !=,
                        0);

                data = _get_sysctl_value(pl[j].sysctl_path);
                if (p == &pl[j])
                    g_assert_cmpstr(data, ==, pl[j].sysctl_value);
                else
                    g_assert(!data);
            }
        } else if (ns_type == CLONE_NEWNS) {
            g_assert_cmpstr(current_namespace_id, ==, p->ns_mnt);
            for (j = 0; j < G_N_ELEMENTS(pl); j++) {
                char          path[600];
                gs_free char *data = NULL;

                nm_sprintf_buf(path, "/sys/devices/virtual/net/%s/ifindex", pl[j].device_name);

                data = _get_sysctl_value(path);
                if (p == &pl[j])
                    g_assert_cmpstr(data,
                                    ==,
                                    nm_sprintf_buf(path,
                                                   "%d",
                                                   nmtstp_link_get_typed(p->platform,
                                                                         0,
                                                                         p->device_name,
                                                                         NM_LINK_TYPE_DUMMY)
                                                       ->ifindex));
                else
                    g_assert(!data);
            }
        } else
            g_assert_not_reached();
    }

    for (i = nstack; i >= 1;) {
        i--;
        nmp_netns_pop(nm_platform_netns_get(stack[i].pl->platform));
    }
}

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

static void
test_netns_bind_to_path(gpointer fixture, gconstpointer test_data)
{
#define P_VAR_RUN                "/run"
#define P_VAR_RUN_NETNS          "/run/netns"
#define P_VAR_RUN_NETNS_BINDNAME "/run/netns/" P_NETNS_BINDNAME
#define P_NETNS_BINDNAME         "nmtst-iproute2-netns"
    gs_unref_object NMPlatform *platform_0 = NULL;
    gs_unref_object NMPlatform *platform_1 = NULL;
    gs_unref_object NMPlatform *platform_2 = NULL;
    nm_auto_pop_netns NMPNetns *netns_pop  = NULL;
    NMPlatform *                platforms[3];
    NMPNetns *                  netns;
    int                         i;

    if (_test_netns_check_skip())
        return;

    platforms[0] = platform_0 = nm_linux_platform_new(TRUE, TRUE);
    platforms[1] = platform_1 = _test_netns_create_platform();
    platforms[2] = platform_2 = _test_netns_create_platform();

    nmtstp_netns_select_random(platforms, G_N_ELEMENTS(platforms), &netns_pop);

    g_assert_cmpint(
        mount("tmpfs", P_VAR_RUN, "tmpfs", MS_NOATIME | MS_NODEV | MS_NOSUID, "mode=0755,size=32K"),
        ==,
        0);
    g_assert_cmpint(mkdir(P_VAR_RUN_NETNS, 755), ==, 0);

    i     = (nmtst_get_rand_uint32() % 2) + 1;
    netns = nm_platform_netns_get(platforms[i]);

    _ADD_DUMMY(platforms[i], "dummy2b");

    g_assert(!g_file_test(P_VAR_RUN_NETNS_BINDNAME, G_FILE_TEST_EXISTS));
    g_assert_cmpint(nmtstp_run_command("ip netns exec " P_NETNS_BINDNAME " true 2>/dev/null"),
                    !=,
                    0);

    g_assert(nmp_netns_bind_to_path(netns, P_VAR_RUN_NETNS_BINDNAME, NULL));

    g_assert(g_file_test(P_VAR_RUN_NETNS_BINDNAME, G_FILE_TEST_EXISTS));
    g_assert_cmpint(nmtstp_run_command("ip netns exec " P_NETNS_BINDNAME " true"), ==, 0);
    g_assert_cmpint(
        nmtstp_run_command("ip netns exec " P_NETNS_BINDNAME " ip link show dummy2b 1>/dev/null"),
        ==,
        0);

    g_assert(nmp_netns_bind_to_path_destroy(netns, P_VAR_RUN_NETNS_BINDNAME));

    g_assert(!g_file_test(P_VAR_RUN_NETNS_BINDNAME, G_FILE_TEST_EXISTS));
    g_assert_cmpint(nmtstp_run_command("ip netns exec " P_NETNS_BINDNAME " true 2>/dev/null"),
                    !=,
                    0);

    g_assert_cmpint(umount(P_VAR_RUN), ==, 0);
}

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

static void
test_sysctl_rename(void)
{
    NMPlatform *const PL        = NM_PLATFORM_GET;
    const char *const IFNAME[3] = {
        "nm-dummy-0",
        "nm-dummy-1",
        "nm-dummy-2",
    };
    int                   ifindex[G_N_ELEMENTS(IFNAME)] = {0};
    nm_auto_close int     dirfd                         = -1;
    int                   i;
    char                  ifname_buf[IFNAMSIZ];
    char *                s;
    const NMPlatformLink *pllink;

    ifindex[0] = nmtstp_link_dummy_add(PL, -1, IFNAME[0])->ifindex;
    ifindex[1] = nmtstp_link_dummy_add(PL, -1, IFNAME[1])->ifindex;

    s = (nmtst_get_rand_uint32() % 2) ? NULL : ifname_buf;

    if (nmtst_get_rand_uint32() % 2) {
        /* bring the platform cache out of sync */
        nmtstp_run_command_check("ip link set %s name %s", IFNAME[0], IFNAME[2]);
        nm_platform_process_events(PL);
        nmtstp_run_command_check("ip link set %s name %s", IFNAME[2], IFNAME[0]);

        pllink = nm_platform_link_get_by_ifname(PL, IFNAME[2]);
        g_assert(pllink && pllink->ifindex == ifindex[0]);
        pllink = nm_platform_link_get_by_ifname(PL, IFNAME[0]);
        g_assert(!pllink);
    }

    /* open dirfd for IFNAME[0] */
    i = nmtst_get_rand_uint32() % (2 + G_N_ELEMENTS(IFNAME));
    if (i == 0) {
        dirfd = nm_platform_sysctl_open_netdir(PL, ifindex[0], s);
    } else {
        const char *ifname_guess;

        /* provide a wrong or no guess. */
        ifname_guess = i == 1 ? NULL : IFNAME[i - 2];
        dirfd        = nmp_utils_sysctl_open_netdir(ifindex[0], ifname_guess, s);
    }
    g_assert(dirfd >= 0);
    if (s)
        g_assert_cmpstr(s, ==, IFNAME[0]);

    /* possibly rename the interfaces. */
    switch (nmtst_get_rand_uint32() % 4) {
    case 0:
        break;
    case 1:
        nmtstp_run_command_check("ip link set %s name %s", IFNAME[0], IFNAME[2]);
        break;
    case 2:
        nmtstp_run_command_check("ip link set %s name %s", IFNAME[0], IFNAME[2]);
        nmtstp_run_command_check("ip link set %s name %s", IFNAME[1], IFNAME[0]);
        break;
    }

    /* possibly, resync platform cache (should make no difference). */
    if (nmtst_get_rand_uint32() % 2)
        nm_platform_process_events(PL);

    /* check that we still read the same file. */
    switch (nmtst_get_rand_uint32() % 2) {
    case 0:
    {
        gs_free char *c = NULL;

        if (!nm_utils_file_get_contents(dirfd,
                                        "ifindex",
                                        1 * 1024 * 1024,
                                        NM_UTILS_FILE_GET_CONTENTS_FLAG_NONE,
                                        &c,
                                        NULL,
                                        NULL,
                                        NULL))
            g_assert_not_reached();
        g_assert_cmpint(ifindex[0], ==, (int) _nm_utils_ascii_str_to_int64(c, 10, 0, G_MAXINT, -1));
        break;
    }
    case 1:
    {
        g_assert_cmpint(ifindex[0],
                        ==,
                        (gint32) nm_platform_sysctl_get_int32(
                            PL,
                            NMP_SYSCTL_PATHID_NETDIR(dirfd, s ?: "<unknown>", "ifindex"),
                            -1));
        break;
    }
    }

    nm_platform_process_events(PL);
    nmtstp_link_delete(PL, -1, ifindex[0], NULL, TRUE);
    nmtstp_link_delete(PL, -1, ifindex[1], NULL, TRUE);
}

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

static void
test_sysctl_netns_switch(void)
{
    const char *const IFNAME = "nm-dummy-0";
    int               ifindex, ifindex_tmp;
    nm_auto_close int dirfd = -1;
    char              ifname_buf[IFNAMSIZ];
    char *            s;
    gs_unref_object NMPlatform *platform_0  = NULL;
    gs_unref_object NMPlatform *platform_1  = NULL;
    gs_unref_object NMPlatform *platform_2  = NULL;
    nm_auto_pop_netns NMPNetns *netns_pop_1 = NULL;
    nm_auto_pop_netns NMPNetns *netns_pop_2 = NULL;
    nm_auto_pop_netns NMPNetns *netns_pop_3 = NULL;
    NMPlatform *                PL;
    NMPlatform *                platforms[3];

    if (_test_netns_check_skip())
        return;

    platforms[0] = platform_0 = nm_linux_platform_new(TRUE, TRUE);
    platforms[1] = platform_1 = _test_netns_create_platform();
    platforms[2] = platform_2 = _test_netns_create_platform();
    PL                        = platforms[nmtst_get_rand_uint32() % 3];

    nmtstp_netns_select_random(platforms, G_N_ELEMENTS(platforms), &netns_pop_1);

    ifindex = nmtstp_link_dummy_add(PL, FALSE, IFNAME)->ifindex;

    nmtstp_netns_select_random(platforms, G_N_ELEMENTS(platforms), &netns_pop_2);

    s     = (nmtst_get_rand_uint32() % 2) ? NULL : ifname_buf;
    dirfd = nm_platform_sysctl_open_netdir(PL, ifindex, s);
    g_assert(dirfd >= 0);
    if (s)
        g_assert_cmpstr(s, ==, IFNAME);

    nmtstp_netns_select_random(platforms, G_N_ELEMENTS(platforms), &netns_pop_3);

    /* even if we switch to other namespaces, we can still lookup the path correctly,
     * either using dirfd or via the platform instance (which switches namespace as needed). */
    {
        gs_free char *c = NULL;

        if (!nm_utils_file_get_contents(dirfd,
                                        "ifindex",
                                        0,
                                        NM_UTILS_FILE_GET_CONTENTS_FLAG_NONE,
                                        &c,
                                        NULL,
                                        NULL,
                                        NULL))
            g_assert_not_reached();
        g_assert_cmpint(ifindex, ==, (int) _nm_utils_ascii_str_to_int64(c, 10, 0, G_MAXINT, -1));
    }
    g_assert_cmpint(ifindex,
                    ==,
                    (gint32) nm_platform_sysctl_get_int32(
                        PL,
                        NMP_SYSCTL_PATHID_NETDIR(dirfd, s ?: "<unknown>", "ifindex"),
                        -1));
    g_assert_cmpint(
        ifindex,
        ==,
        (gint32) nm_platform_sysctl_get_int32(
            PL,
            NMP_SYSCTL_PATHID_ABSOLUTE(nm_sprintf_bufa(100, "/sys/class/net/%s/ifindex", IFNAME)),
            -1));

    /* also test that nm_platform_sysctl_get() sets errno to ENOENT for non-existing paths. */
    {
        gint64 i64;
        int    errsv;
        char * v;

        errno = ESRCH;
        v     = nm_platform_sysctl_get(
            PL,
            NMP_SYSCTL_PATHID_ABSOLUTE("/sys/devices/virtual/net/not-existing/ifindex"));
        errsv = errno;
        g_assert(!v);
        g_assert_cmpint(errsv, ==, ENOENT);

        errno = ESRCH;
        i64   = nm_platform_sysctl_get_int_checked(
            PL,
            NMP_SYSCTL_PATHID_ABSOLUTE("/sys/devices/virtual/net/not-existing/ifindex"),
            10,
            1,
            G_MAXINT,
            -1);
        errsv = errno;
        g_assert_cmpint(i64, ==, -1);
        g_assert_cmpint(errsv, ==, ENOENT);

        errno = ESRCH;
        v     = nm_platform_sysctl_get(
            PL,
            NMP_SYSCTL_PATHID_ABSOLUTE("/sys/devices/virtual/net/lo/not-existing"));
        errsv = errno;
        g_assert(!v);
        g_assert_cmpint(errsv, ==, ENOENT);

        errno = ESRCH;
        i64   = nm_platform_sysctl_get_int_checked(
            PL,
            NMP_SYSCTL_PATHID_ABSOLUTE("/sys/devices/virtual/net/lo/not-existing"),
            10,
            1,
            G_MAXINT,
            -1);
        errsv = errno;
        g_assert_cmpint(i64, ==, -1);
        g_assert_cmpint(errsv, ==, ENOENT);
    }

    /* accessing the path directly, only succeeds iff the current namespace happens to be the namespace
     * in which we created the link. */
    {
        gs_free char *c = NULL;

        if (!nm_utils_file_get_contents(-1,
                                        nm_sprintf_bufa(100, "/sys/class/net/%s/ifindex", IFNAME),
                                        0,
                                        NM_UTILS_FILE_GET_CONTENTS_FLAG_NONE,
                                        &c,
                                        NULL,
                                        NULL,
                                        NULL))
            ifindex_tmp = -1;
        else
            ifindex_tmp = _nm_utils_ascii_str_to_int64(c, 10, 0, G_MAXINT, -2);
    }
    if (nmp_netns_get_current() == nm_platform_netns_get(PL))
        g_assert_cmpint(ifindex_tmp, ==, ifindex);
    else
        g_assert_cmpint(ifindex_tmp, ==, -1);

    nmtstp_link_delete(PL, FALSE, ifindex, NULL, TRUE);
}

typedef struct {
    GMainLoop * loop;
    const char *path;
    gboolean    expected_success;
    gint32      expected_value;
} SetAsyncData;

static void
sysctl_set_async_cb(GError *error, gpointer user_data)
{
    SetAsyncData *data = user_data;

    if (data->expected_success) {
        g_assert_no_error(error);
        g_assert_cmpint(nm_platform_sysctl_get_int32(NM_PLATFORM_GET,
                                                     NMP_SYSCTL_PATHID_ABSOLUTE(data->path),
                                                     -1),
                        ==,
                        data->expected_value);
    } else
        g_assert(error);

    g_main_loop_quit(data->loop);
}

static void
test_sysctl_set_async(void)
{
    NMPlatform *const PL     = NM_PLATFORM_GET;
    const char *const IFNAME = "nm-dummy-0";
    const char *const PATH   = "/proc/sys/net/ipv4/conf/nm-dummy-0/rp_filter";
    GMainLoop *       loop;
    gs_unref_object GCancellable *cancellable = NULL;
    gboolean                      proc_writable;
    SetAsyncData                  data;
    int                           ifindex;

    ifindex       = nmtstp_link_dummy_add(PL, -1, IFNAME)->ifindex;
    loop          = g_main_loop_new(NULL, FALSE);
    cancellable   = g_cancellable_new();
    proc_writable = access(PATH, W_OK) == 0;

    data = (SetAsyncData){
        .loop             = loop,
        .path             = PATH,
        .expected_success = proc_writable,
        .expected_value   = 2,
    };

    nm_platform_sysctl_set_async(PL,
                                 NMP_SYSCTL_PATHID_ABSOLUTE(PATH),
                                 (const char *[]){"2", NULL},
                                 sysctl_set_async_cb,
                                 &data,
                                 cancellable);

    if (!nmtst_main_loop_run(loop, 1000))
        g_assert_not_reached();

    data = (SetAsyncData){
        .loop             = loop,
        .path             = PATH,
        .expected_success = proc_writable,
        .expected_value   = 1,
    };

    nm_platform_sysctl_set_async(PL,
                                 NMP_SYSCTL_PATHID_ABSOLUTE(PATH),
                                 (const char *[]){"2", "0", "1", "0", "1", NULL},
                                 sysctl_set_async_cb,
                                 &data,
                                 cancellable);

    if (!nmtst_main_loop_run(loop, 2000))
        g_assert_not_reached();

    nmtstp_link_delete(NULL, -1, ifindex, IFNAME, TRUE);
    g_main_loop_unref(loop);
}

static void
test_sysctl_set_async_fail(void)
{
    NMPlatform *const PL     = NM_PLATFORM_GET;
    const char *const IFNAME = "nm-dummy-0";
    const char *const PATH   = "/proc/sys/net/ipv4/conf/nm-dummy-0/does-not-exist";
    GMainLoop *       loop;
    gs_unref_object GCancellable *cancellable = NULL;
    SetAsyncData                  data;
    int                           ifindex;

    ifindex     = nmtstp_link_dummy_add(PL, -1, IFNAME)->ifindex;
    loop        = g_main_loop_new(NULL, FALSE);
    cancellable = g_cancellable_new();

    data = (SetAsyncData){
        .loop             = loop,
        .path             = PATH,
        .expected_success = FALSE,
    };

    nm_platform_sysctl_set_async(PL,
                                 NMP_SYSCTL_PATHID_ABSOLUTE(PATH),
                                 (const char *[]){"2", NULL},
                                 sysctl_set_async_cb,
                                 &data,
                                 cancellable);

    if (!nmtst_main_loop_run(loop, 1000))
        g_assert_not_reached();

    nmtstp_link_delete(NULL, -1, ifindex, IFNAME, TRUE);
    g_main_loop_unref(loop);
}

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

static gpointer
_test_netns_mt_thread(gpointer data)
{
    NMPNetns *      netns1           = data;
    gs_unref_object NMPNetns *netns2 = NULL;
    NMPNetns *                netns_bottom;
    NMPNetns *                initial;

    netns_bottom = nmp_netns_get_initial();
    g_assert(netns_bottom);

    /* I don't know why, but we need to create a new netns here at least once.
     * Otherwise, setns(, CLONE_NEWNS) below fails with EINVAL (???).
     *
     * Something is not right here, but what?  */
    netns2 = nmp_netns_new();
    nmp_netns_pop(netns2);
    g_clear_object(&netns2);

    nmp_netns_push(netns1);
    nmp_netns_push_type(netns_bottom, CLONE_NEWNET);
    nmp_netns_push_type(netns_bottom, CLONE_NEWNS);
    nmp_netns_push_type(netns1, CLONE_NEWNS);
    nmp_netns_pop(netns1);
    nmp_netns_pop(netns_bottom);
    nmp_netns_pop(netns_bottom);
    nmp_netns_pop(netns1);

    initial = nmp_netns_get_initial();
    g_assert(NMP_IS_NETNS(initial));
    return g_object_ref(initial);
}

static void
test_netns_mt(void)
{
    gs_unref_object NMPNetns *netns1 = NULL;
    NMPNetns *                initial_from_other_thread;
    GThread *                 th;

    if (_test_netns_check_skip())
        return;

    netns1 = nmp_netns_new();
    g_assert(NMP_NETNS(netns1));
    nmp_netns_pop(netns1);

    th                        = g_thread_new("nm-test-netns-mt", _test_netns_mt_thread, netns1);
    initial_from_other_thread = g_thread_join(th);
    g_assert(NMP_IS_NETNS(initial_from_other_thread));

    if (nmtst_get_rand_bool()) {
        nmp_netns_push(initial_from_other_thread);
        nmp_netns_pop(initial_from_other_thread);
    }

    g_object_add_weak_pointer(G_OBJECT(initial_from_other_thread),
                              (gpointer *) &initial_from_other_thread);
    g_object_unref(initial_from_other_thread);
    g_assert(initial_from_other_thread == NULL);
}

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

static void
ethtool_features_dump(const NMEthtoolFeatureStates *features)
{
    guint i, j;

    g_assert(features);

    _LOGT(">>> %u features (%u ss-features)", features->n_states, features->n_ss_features);

    for (i = 0; i < features->n_states; i++) {
        const NMEthtoolFeatureState *s = &features->states_list[i];

        _LOGT(">>> feature-list[%3u]: %3d = %-32s (%3u) | %s %s %s %s",
              i,
              (int) s->info->ethtool_id,
              s->info->kernel_names[s->idx_kernel_name],
              s->idx_ss_features,
              s->active ? "ACT" : "act",
              s->available ? "AVA" : "ava",
              s->never_changed ? "NCH" : "nch",
              s->requested ? "REQ" : "req");
    }
    for (i = 0; i < _NM_ETHTOOL_ID_FEATURE_NUM; i++) {
        _LOGT(">>> feature-idx [%3u]: %-32s = %u features",
              i + (guint) _NM_ETHTOOL_ID_FEATURE_FIRST,
              nm_ethtool_data[i + _NM_ETHTOOL_ID_FEATURE_FIRST]->optname,
              (guint) NM_PTRARRAY_LEN(features->states_indexed[i]));
        for (j = 0; features->states_indexed[i] && features->states_indexed[i][j]; j++) {
            const NMEthtoolFeatureState *s = features->states_indexed[i][j];

            _LOGT(">>>  %3u: %-32s | %s %s %s %s",
                  j,
                  s->info->kernel_names[s->idx_kernel_name],
                  s->active ? "ACT" : "act",
                  s->available ? "AVA" : "ava",
                  s->never_changed ? "NCH" : "nch",
                  s->requested ? "REQ" : "req");
        }
    }
}

static void
test_ethtool_features_get(void)
{
    gs_unref_ptrarray GPtrArray *gfree_keeper = g_ptr_array_new_with_free_func(g_free);
    const int                    IFINDEX      = 1;
    guint                        i;
    guint                        i_run;

    for (i_run = 0; i_run < 5; i_run++) {
        NMEthtoolFeatureStates *features;
        NMTernary *             requested;
        gboolean                do_set = TRUE;

        requested = g_new(NMTernary, _NM_ETHTOOL_ID_FEATURE_NUM);
        for (i = 0; i < _NM_ETHTOOL_ID_FEATURE_NUM; i++)
            requested[i] = NM_TERNARY_DEFAULT;
        g_ptr_array_add(gfree_keeper, requested);

        if (i_run == 0) {
            requested[_NM_ETHTOOL_ID_FEATURE_AS_IDX(NM_ETHTOOL_ID_FEATURE_RX)]  = NM_TERNARY_FALSE;
            requested[_NM_ETHTOOL_ID_FEATURE_AS_IDX(NM_ETHTOOL_ID_FEATURE_TSO)] = NM_TERNARY_FALSE;
            requested[_NM_ETHTOOL_ID_FEATURE_AS_IDX(NM_ETHTOOL_ID_FEATURE_TX_TCP6_SEGMENTATION)] =
                NM_TERNARY_FALSE;
        } else if (i_run == 1)
            do_set = FALSE;
        else if (i_run == 2) {
            requested[_NM_ETHTOOL_ID_FEATURE_AS_IDX(NM_ETHTOOL_ID_FEATURE_TSO)] = NM_TERNARY_FALSE;
            requested[_NM_ETHTOOL_ID_FEATURE_AS_IDX(NM_ETHTOOL_ID_FEATURE_TX_TCP6_SEGMENTATION)] =
                NM_TERNARY_TRUE;
        } else if (i_run == 3)
            do_set = FALSE;

        _LOGT(">>> ethtool-features-get RUN %u (do-set=%s", i_run, do_set ? "set" : "reset");

        features = nmp_utils_ethtool_get_features(IFINDEX);
        g_ptr_array_add(gfree_keeper, features);

        ethtool_features_dump(features);

        if (_LOGT_ENABLED())
            _system("ethtool -k lo");

        if (!do_set) {
            requested = gfree_keeper->pdata[i_run * 2 - 2];
            features  = gfree_keeper->pdata[i_run * 2 - 1];
        }

        nmp_utils_ethtool_set_features(IFINDEX, features, requested, do_set);
    }
}

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

NMTstpSetupFunc const _nmtstp_setup_platform_func = SETUP;

void
_nmtstp_init_tests(int *argc, char ***argv)
{
    nmtst_init_with_logging(argc, argv, NULL, "ALL");
}

void
_nmtstp_setup_tests(void)
{
    nmtstp_link_delete(NM_PLATFORM_GET, -1, -1, DEVICE_NAME, FALSE);
    nmtstp_link_delete(NM_PLATFORM_GET, -1, -1, SLAVE_NAME, FALSE);
    nmtstp_link_delete(NM_PLATFORM_GET, -1, -1, PARENT_NAME, FALSE);
    g_assert(!nm_platform_link_get_by_ifname(NM_PLATFORM_GET, DEVICE_NAME));
    g_assert(!nm_platform_link_get_by_ifname(NM_PLATFORM_GET, SLAVE_NAME));
    g_assert(!nm_platform_link_get_by_ifname(NM_PLATFORM_GET, PARENT_NAME));

    g_test_add_func("/link/bogus", test_bogus);
    g_test_add_func("/link/loopback", test_loopback);
    g_test_add_func("/link/internal", test_internal);
    g_test_add_func("/link/software/bridge", test_bridge);
    g_test_add_func("/link/software/bond", test_bond);
    g_test_add_func("/link/software/team", test_team);
    g_test_add_func("/link/software/vlan", test_vlan);
    g_test_add_func("/link/software/bridge/addr", test_bridge_addr);

    if (nmtstp_is_root_test()) {
        g_test_add_func("/link/external", test_external);

        test_software_detect_add("/link/software/detect/bridge", NM_LINK_TYPE_BRIDGE, 0);
        test_software_detect_add("/link/software/detect/gre", NM_LINK_TYPE_GRE, 0);
        test_software_detect_add("/link/software/detect/gretap", NM_LINK_TYPE_GRETAP, 0);
        test_software_detect_add("/link/software/detect/ip6tnl/0", NM_LINK_TYPE_IP6TNL, 0);
        test_software_detect_add("/link/software/detect/ip6tnl/1", NM_LINK_TYPE_IP6TNL, 1);
        test_software_detect_add("/link/software/detect/ip6gre", NM_LINK_TYPE_IP6GRE, 0);
        test_software_detect_add("/link/software/detect/ip6gretap", NM_LINK_TYPE_IP6GRETAP, 0);
        test_software_detect_add("/link/software/detect/ipip", NM_LINK_TYPE_IPIP, 0);
        test_software_detect_add("/link/software/detect/macvlan", NM_LINK_TYPE_MACVLAN, 0);
        test_software_detect_add("/link/software/detect/macvtap", NM_LINK_TYPE_MACVTAP, 0);
        test_software_detect_add("/link/software/detect/sit", NM_LINK_TYPE_SIT, 0);
        test_software_detect_add("/link/software/detect/tun", NM_LINK_TYPE_TUN, 0);
        test_software_detect_add("/link/software/detect/vlan", NM_LINK_TYPE_VLAN, 0);
        test_software_detect_add("/link/software/detect/vrf", NM_LINK_TYPE_VRF, 0);
        test_software_detect_add("/link/software/detect/vxlan/0", NM_LINK_TYPE_VXLAN, 0);
        test_software_detect_add("/link/software/detect/vxlan/1", NM_LINK_TYPE_VXLAN, 1);
        test_software_detect_add("/link/software/detect/wireguard/0", NM_LINK_TYPE_WIREGUARD, 0);
        test_software_detect_add("/link/software/detect/wireguard/1", NM_LINK_TYPE_WIREGUARD, 1);
        test_software_detect_add("/link/software/detect/wireguard/2", NM_LINK_TYPE_WIREGUARD, 2);

        g_test_add_func("/link/software/vlan/set-xgress", test_vlan_set_xgress);

        g_test_add_data_func("/link/create-many-links/20",
                             GUINT_TO_POINTER(20),
                             test_create_many_links);
        g_test_add_data_func("/link/create-many-links/1000",
                             GUINT_TO_POINTER(1000),
                             test_create_many_links);

        g_test_add_func("/link/nl-bugs/veth", test_nl_bugs_veth);
        g_test_add_func("/link/nl-bugs/spurious-newlink", test_nl_bugs_spuroius_newlink);
        g_test_add_func("/link/nl-bugs/spurious-dellink", test_nl_bugs_spuroius_dellink);

        g_test_add_vtable("/general/netns/general",
                          0,
                          NULL,
                          _test_netns_setup,
                          test_netns_general,
                          _test_netns_teardown);
        g_test_add_vtable("/general/netns/set-netns",
                          0,
                          NULL,
                          _test_netns_setup,
                          test_netns_set_netns,
                          _test_netns_teardown);
        g_test_add_vtable("/general/netns/push",
                          0,
                          NULL,
                          _test_netns_setup,
                          test_netns_push,
                          _test_netns_teardown);
        g_test_add_vtable("/general/netns/bind-to-path",
                          0,
                          NULL,
                          _test_netns_setup,
                          test_netns_bind_to_path,
                          _test_netns_teardown);

        g_test_add_func("/general/netns/mt", test_netns_mt);

        g_test_add_func("/general/sysctl/rename", test_sysctl_rename);
        g_test_add_func("/general/sysctl/netns-switch", test_sysctl_netns_switch);
        g_test_add_func("/general/sysctl/set-async", test_sysctl_set_async);
        g_test_add_func("/general/sysctl/set-async-fail", test_sysctl_set_async_fail);

        g_test_add_func("/link/ethtool/features/get", test_ethtool_features_get);
    }
}
