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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2014 Susant Sahani <susant@redhat.com>
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 <netinet/ether.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <linux/ip.h>
#include <linux/if_tunnel.h>
#include <libkmod.h>
#include "sd-rtnl.h"
#include "networkd.h"
#include "network-internal.h"
#include "util.h"
static int netdev_fill_ipip_rtnl_message(Link *link, sd_rtnl_message *m) {
NetDev *netdev;
int r;
assert(link);
assert(link->network);
assert(link->network->tunnel);
assert(m);
netdev = link->network->tunnel;
r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->name);
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(m, IFLA_MTU, netdev->mtu);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_MTU attribute: %s",
strerror(-r));
return r;
}
}
r = sd_rtnl_message_open_container(m, IFLA_LINKINFO);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_LINKINFO attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_open_container_union(m, IFLA_INFO_DATA,
netdev_kind_to_string(netdev->kind));
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_INFO_DATA attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_append_u32(m, IFLA_IPTUN_LINK, link->ifindex);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_IPTUN_LINK attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_LOCAL, &netdev->tunnel_local);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_IPTUN_LOCAL attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_REMOTE, &netdev->tunnel_remote);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_IPTUN_REMOTE attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_close_container(m);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_INFO_DATA attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_close_container(m);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_LINKINFO attribute: %s",
strerror(-r));
return r;
}
return r;
}
int netdev_create_tunnel(Link *link, sd_rtnl_message_handler_t callback) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
NetDev *netdev;
int r;
assert(link);
assert(link->network);
assert(link->network->tunnel);
netdev = link->network->tunnel;
assert(netdev);
assert(netdev->name);
assert(netdev->manager);
assert(netdev->manager->rtnl);
assert(netdev->manager->kmod_ctx);
/* Load kernel module first */
switch(netdev->kind) {
case NETDEV_KIND_IPIP:
case NETDEV_KIND_GRE:
case NETDEV_KIND_SIT:
r = load_module(netdev->manager->kmod_ctx,
netdev_kind_to_string(netdev->kind));
if (r < 0) {
log_error_netdev(netdev,
"Could not load Kernel module: %s . Ignoring",
netdev_kind_to_string(netdev->kind));
return r;
}
break;
default:
return -ENOTSUP;
}
r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
if (r < 0) {
log_error_netdev(netdev,
"Could not allocate RTM_NEWLINK message: %s",
strerror(-r));
return r;
}
switch(netdev->kind) {
case NETDEV_KIND_IPIP:
r = netdev_fill_ipip_rtnl_message(link, m);
if(r < 0)
return r;
break;
case NETDEV_KIND_GRE:
case NETDEV_KIND_SIT:
default:
return -ENOTSUP;
}
r = sd_rtnl_call_async(netdev->manager->rtnl, m, callback, netdev, 0, NULL);
if (r < 0) {
log_error_netdev(netdev,
"Could not send rtnetlink message: %s", strerror(-r));
return r;
}
log_debug_netdev(netdev, "Creating tunnel netdev: %s",
netdev_kind_to_string(netdev->kind));
netdev->state = NETDEV_STATE_CREATING;
return 0;
}
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