/*-*- 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/veth.h> #include "sd-rtnl.h" #include "networkd.h" static int netdev_fill_veth_rtnl_message(NetDev *netdev, sd_rtnl_message *m) { int r; assert(netdev); assert(m); r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname); if (r < 0) { log_error_netdev(netdev, "Could not append IFLA_IFNAME, 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_open_container(m, VETH_INFO_PEER); if (r < 0) { log_error_netdev(netdev, "Could not append IFLA_IPTUN_LINK attribute: %s", strerror(-r)); return r; } if(netdev->ifname_peer) { r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname_peer); if (r < 0) { log_error("Failed to add netlink interface name: %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_veth(NetDev *netdev, sd_rtnl_message_handler_t callback) { _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL; int r; assert(netdev); assert(netdev->ifname); assert(netdev->manager); assert(netdev->manager->rtnl); 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; } if(netdev->kind != NETDEV_KIND_VETH) return -ENOTSUP; r = netdev_fill_veth_rtnl_message(netdev, m); if(r < 0) return r; 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 veth netdev: %s", netdev_kind_to_string(netdev->kind)); netdev->state = NETDEV_STATE_CREATING; return 0; }