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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
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 <net/if.h>
#include <linux/veth.h>
#include "sd-netlink.h"
#include "netdev/veth.h"
static int netdev_veth_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
Veth *v;
int r;
assert(netdev);
assert(!link);
assert(m);
v = VETH(netdev);
assert(v);
r = sd_netlink_message_open_container(m, VETH_INFO_PEER);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append VETH_INFO_PEER attribute: %m");
if (v->ifname_peer) {
r = sd_netlink_message_append_string(m, IFLA_IFNAME, v->ifname_peer);
if (r < 0)
return log_error_errno(r, "Failed to add netlink interface name: %m");
}
if (v->mac_peer) {
r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, v->mac_peer);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS attribute: %m");
}
r = sd_netlink_message_close_container(m);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
return r;
}
static int netdev_veth_verify(NetDev *netdev, const char *filename) {
Veth *v;
int r;
assert(netdev);
assert(filename);
v = VETH(netdev);
assert(v);
if (!v->ifname_peer) {
log_warning("Veth NetDev without peer name configured in %s. Ignoring",
filename);
return -EINVAL;
}
if (!v->mac_peer) {
r = netdev_get_mac(v->ifname_peer, &v->mac_peer);
if (r < 0) {
log_warning("Failed to generate predictable MAC address for %s. Ignoring",
v->ifname_peer);
return -EINVAL;
}
}
return 0;
}
static void veth_done(NetDev *n) {
Veth *v;
assert(n);
v = VETH(n);
assert(v);
free(v->ifname_peer);
free(v->mac_peer);
}
const NetDevVTable veth_vtable = {
.object_size = sizeof(Veth),
.sections = "Match\0NetDev\0Peer\0",
.done = veth_done,
.fill_message_create = netdev_veth_fill_message_create,
.create_type = NETDEV_CREATE_INDEPENDENT,
.config_verify = netdev_veth_verify,
};
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