114 lines
3.2 KiB
C
114 lines
3.2 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2014 Susant Sahani <susant@redhat.com>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <linux/veth.h>
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#include <net/if.h>
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#include "sd-netlink.h"
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#include "netdev/veth.h"
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static int netdev_veth_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
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Veth *v;
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int r;
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assert(netdev);
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assert(!link);
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assert(m);
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v = VETH(netdev);
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assert(v);
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r = sd_netlink_message_open_container(m, VETH_INFO_PEER);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append VETH_INFO_PEER attribute: %m");
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if (v->ifname_peer) {
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r = sd_netlink_message_append_string(m, IFLA_IFNAME, v->ifname_peer);
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if (r < 0)
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return log_error_errno(r, "Failed to add netlink interface name: %m");
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}
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if (v->mac_peer) {
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r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, v->mac_peer);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS attribute: %m");
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}
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r = sd_netlink_message_close_container(m);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
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return r;
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}
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static int netdev_veth_verify(NetDev *netdev, const char *filename) {
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Veth *v;
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int r;
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assert(netdev);
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assert(filename);
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v = VETH(netdev);
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assert(v);
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if (!v->ifname_peer) {
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log_warning("Veth NetDev without peer name configured in %s. Ignoring",
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filename);
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return -EINVAL;
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}
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if (!v->mac_peer) {
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r = netdev_get_mac(v->ifname_peer, &v->mac_peer);
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if (r < 0) {
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log_warning("Failed to generate predictable MAC address for %s. Ignoring",
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v->ifname_peer);
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return -EINVAL;
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}
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}
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return 0;
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}
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static void veth_done(NetDev *n) {
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Veth *v;
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assert(n);
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v = VETH(n);
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assert(v);
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free(v->ifname_peer);
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free(v->mac_peer);
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}
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const NetDevVTable veth_vtable = {
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.object_size = sizeof(Veth),
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.sections = "Match\0NetDev\0Peer\0",
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.done = veth_done,
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.fill_message_create = netdev_veth_fill_message_create,
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.create_type = NETDEV_CREATE_INDEPENDENT,
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.config_verify = netdev_veth_verify,
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};
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