/* SPDX-License-Identifier: LGPL-2.1-or-later */

#include <net/if.h>
#include <netinet/in.h>
#include <linux/if_arp.h>

#include "conf-parser.h"
#include "ipvlan.h"
#include "ipvlan-util.h"
#include "networkd-link.h"
#include "string-util.h"

DEFINE_CONFIG_PARSE_ENUM(config_parse_ipvlan_mode, ipvlan_mode, IPVlanMode, "Failed to parse ipvlan mode");
DEFINE_CONFIG_PARSE_ENUM(config_parse_ipvlan_flags, ipvlan_flags, IPVlanFlags, "Failed to parse ipvlan flags");

static int netdev_ipvlan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *req) {
        IPVlan *m;
        int r;

        assert(netdev);
        assert(link);
        assert(netdev->ifname);

        if (netdev->kind == NETDEV_KIND_IPVLAN)
                m = IPVLAN(netdev);
        else
                m = IPVTAP(netdev);

        assert(m);

        if (m->mode != _NETDEV_IPVLAN_MODE_INVALID) {
                r = sd_netlink_message_append_u16(req, IFLA_IPVLAN_MODE, m->mode);
                if (r < 0)
                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPVLAN_MODE attribute: %m");
        }

        if (m->flags != _NETDEV_IPVLAN_FLAGS_INVALID) {
                r = sd_netlink_message_append_u16(req, IFLA_IPVLAN_FLAGS, m->flags);
                if (r < 0)
                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPVLAN_FLAGS attribute: %m");
        }

        return 0;
}

static void ipvlan_init(NetDev *n) {
        IPVlan *m;

        assert(n);

        if (n->kind == NETDEV_KIND_IPVLAN)
                m = IPVLAN(n);
        else
                m = IPVTAP(n);

        assert(m);

        m->mode = _NETDEV_IPVLAN_MODE_INVALID;
        m->flags = _NETDEV_IPVLAN_FLAGS_INVALID;
}

const NetDevVTable ipvlan_vtable = {
        .object_size = sizeof(IPVlan),
        .init = ipvlan_init,
        .sections = NETDEV_COMMON_SECTIONS "IPVLAN\0",
        .fill_message_create = netdev_ipvlan_fill_message_create,
        .create_type = NETDEV_CREATE_STACKED,
        .iftype = ARPHRD_ETHER,
        .generate_mac = true,
};

const NetDevVTable ipvtap_vtable = {
        .object_size = sizeof(IPVlan),
        .init = ipvlan_init,
        .sections = NETDEV_COMMON_SECTIONS "IPVTAP\0",
        .fill_message_create = netdev_ipvlan_fill_message_create,
        .create_type = NETDEV_CREATE_STACKED,
        .iftype = ARPHRD_ETHER,
        .generate_mac = true,
};

IPVlanMode link_get_ipvlan_mode(Link *link) {
        NetDev *netdev;

        if (!streq_ptr(link->kind, "ipvlan"))
                return _NETDEV_IPVLAN_MODE_INVALID;

        if (netdev_get(link->manager, link->ifname, &netdev) < 0)
                return _NETDEV_IPVLAN_MODE_INVALID;

        if (netdev->kind != NETDEV_KIND_IPVLAN)
                return _NETDEV_IPVLAN_MODE_INVALID;

        return IPVLAN(netdev)->mode;
}
