abf446af60
This patch introduces sit tunnel support to networkd Example conf: file: sit.netdev [NetDev] Name=sit-tun Kind=sit MTUBytes=1480 [Tunnel] Local=10.65.223.238 Remote=10.65.223.239 file: sit.network [Match] Name=em1 [Network] Tunnel=sit-tun [tomegun: rebased]
302 lines
10 KiB
C
302 lines
10 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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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 <netinet/ether.h>
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#include <arpa/inet.h>
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#include <net/if.h>
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#include <linux/ip.h>
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#include <linux/if_tunnel.h>
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#include <libkmod.h>
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#include "sd-rtnl.h"
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#include "networkd.h"
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#include "network-internal.h"
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#include "util.h"
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static int netdev_fill_ipip_rtnl_message(Link *link, sd_rtnl_message *m) {
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NetDev *netdev;
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int r;
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assert(link);
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assert(link->network);
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assert(link->network->tunnel);
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assert(m);
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netdev = link->network->tunnel;
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r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_IFNAME, attribute: %s",
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strerror(-r));
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return r;
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}
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if(netdev->mtu) {
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r = sd_rtnl_message_append_u32(m, IFLA_MTU, netdev->mtu);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_MTU attribute: %s",
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strerror(-r));
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return r;
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}
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}
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r = sd_rtnl_message_open_container(m, IFLA_LINKINFO);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_LINKINFO attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_open_container_union(m, IFLA_INFO_DATA,
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netdev_kind_to_string(netdev->kind));
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_INFO_DATA attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_append_u32(m, IFLA_IPTUN_LINK, link->ifindex);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_IPTUN_LINK attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_LOCAL, &netdev->tunnel_local);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_IPTUN_LOCAL attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_REMOTE, &netdev->tunnel_remote);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_IPTUN_REMOTE attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_append_u8(m, IFLA_IPTUN_TTL, netdev->tunnel_ttl);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_IPTUN_TTL attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_close_container(m);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_INFO_DATA attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_close_container(m);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_LINKINFO attribute: %s",
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strerror(-r));
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return r;
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}
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return r;
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}
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static int netdev_fill_sit_rtnl_message(Link *link, sd_rtnl_message *m) {
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NetDev *netdev;
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int r;
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assert(link);
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assert(link->network);
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assert(link->network->tunnel);
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assert(m);
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netdev = link->network->tunnel;
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r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_IFNAME, attribute: %s",
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strerror(-r));
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return r;
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}
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if(netdev->mtu) {
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r = sd_rtnl_message_append_u32(m, IFLA_MTU, netdev->mtu);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_MTU attribute: %s",
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strerror(-r));
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return r;
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}
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}
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r = sd_rtnl_message_open_container(m, IFLA_LINKINFO);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_LINKINFO attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_open_container_union(m, IFLA_INFO_DATA,
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netdev_kind_to_string(netdev->kind));
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_INFO_DATA attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_append_u32(m, IFLA_IPTUN_LINK, link->ifindex);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_IPTUN_LINK attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_LOCAL, &netdev->tunnel_local);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_IPTUN_LOCAL attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_REMOTE, &netdev->tunnel_remote);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_IPTUN_REMOTE attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_append_u8(m, IFLA_IPTUN_TOS, netdev->tunnel_tos);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_IPTUN_TOS attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_close_container(m);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_INFO_DATA attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_close_container(m);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not append IFLA_LINKINFO attribute: %s",
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strerror(-r));
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return r;
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}
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return r;
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}
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int netdev_create_tunnel(Link *link, sd_rtnl_message_handler_t callback) {
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_cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
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NetDev *netdev;
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int r;
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assert(link);
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assert(link->network);
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assert(link->network->tunnel);
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netdev = link->network->tunnel;
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assert(netdev);
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assert(netdev->ifname);
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assert(netdev->manager);
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assert(netdev->manager->rtnl);
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assert(netdev->manager->kmod_ctx);
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/* Load kernel module first */
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switch(netdev->kind) {
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case NETDEV_KIND_IPIP:
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case NETDEV_KIND_GRE:
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case NETDEV_KIND_SIT:
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r = load_module(netdev->manager->kmod_ctx,
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netdev_kind_to_string(netdev->kind));
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not load Kernel module: %s . Ignoring",
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netdev_kind_to_string(netdev->kind));
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return r;
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}
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break;
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default:
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return -ENOTSUP;
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}
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r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not allocate RTM_NEWLINK message: %s",
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strerror(-r));
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return r;
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}
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switch(netdev->kind) {
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case NETDEV_KIND_IPIP:
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r = netdev_fill_ipip_rtnl_message(link, m);
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if(r < 0)
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return r;
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break;
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case NETDEV_KIND_SIT:
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r = netdev_fill_sit_rtnl_message(link, m);
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if(r < 0)
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return r;
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break;
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case NETDEV_KIND_GRE:
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default:
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return -ENOTSUP;
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}
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r = sd_rtnl_call_async(netdev->manager->rtnl, m, callback, netdev, 0, NULL);
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if (r < 0) {
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log_error_netdev(netdev,
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"Could not send rtnetlink message: %s", strerror(-r));
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return r;
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}
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log_debug_netdev(netdev, "Creating tunnel netdev: %s",
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netdev_kind_to_string(netdev->kind));
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netdev->state = NETDEV_STATE_CREATING;
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return 0;
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}
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