/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

/***
  This file is part of systemd.

  Copyright 2013 Tom Gundersen <teg@jklm.no>

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <net/if.h>

#include "networkd.h"
#include "network-internal.h"
#include "list.h"

int netdev_create_vlan(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) {
        _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
        const char *kind;
        int r;

        assert(netdev);
        assert(netdev->kind == NETDEV_KIND_VLAN);
        assert(link);
        assert(callback);
        assert(netdev->ifname);
        assert(netdev->manager);
        assert(netdev->manager->rtnl);

        r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_NEWLINK, 0);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not allocate RTM_NEWLINK message: %s",
                                 strerror(-r));
                return r;
        }

        if (link) {
                r = sd_rtnl_message_append_u32(req, IFLA_LINK, link->ifindex);
                if (r < 0) {
                        log_error_netdev(netdev,
                                         "Could not append IFLA_LINK attribute: %s",
                                         strerror(-r));
                        return r;
                }
        }

        r = sd_rtnl_message_append_string(req, IFLA_IFNAME, netdev->ifname);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not append IFLA_IFNAME attribute: %s",
                                 strerror(-r));
                return r;
        }

        if (netdev->mtu) {
                r = sd_rtnl_message_append_u32(req, IFLA_MTU, netdev->mtu);
                if (r < 0) {
                        log_error_netdev(netdev,
                                         "Could not append IFLA_MTU attribute: %s",
                                         strerror(-r));
                        return r;
                }
        }

        if (netdev->mac) {
                r = sd_rtnl_message_append_ether_addr(req, IFLA_ADDRESS, netdev->mac);
                if (r < 0) {
                        log_error_netdev(netdev,
                                         "Colud not append IFLA_ADDRESS attribute: %s",
                                         strerror(-r));
                    return r;
                }
        }

        r = sd_rtnl_message_open_container(req, IFLA_LINKINFO);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not open IFLA_LINKINFO container: %s",
                                 strerror(-r));
                return r;
        }

        kind = netdev_kind_to_string(netdev->kind);
        if (!kind) {
                log_error_netdev(netdev, "Invalid kind");
                return -EINVAL;
        }

        r = sd_rtnl_message_open_container_union(req, IFLA_INFO_DATA, kind);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not open IFLA_INFO_DATA container: %s",
                                  strerror(-r));
                return r;
        }

        if (netdev->vlanid <= VLANID_MAX) {
                r = sd_rtnl_message_append_u16(req, IFLA_VLAN_ID, netdev->vlanid);
                if (r < 0) {
                        log_error_netdev(netdev,
                                         "Could not append IFLA_VLAN_ID attribute: %s",
                                         strerror(-r));
                        return r;
                }
        }

        r = sd_rtnl_message_close_container(req);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not close IFLA_INFO_DATA container %s",
                                 strerror(-r));
                return r;
        }

        r = sd_rtnl_message_close_container(req);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not close IFLA_LINKINFO container %s",
                                 strerror(-r));
                return r;
        }

        r = sd_rtnl_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL);
        if (r < 0) {
                log_error_netdev(netdev,
                                 "Could not send rtnetlink message: %s", strerror(-r));
                return r;
        }

        link_ref(link);

        log_debug_netdev(netdev, "creating netdev");

        netdev->state = NETDEV_STATE_CREATING;

        return 0;
}
