diff options
Diffstat (limited to 'src/network/networkd-tunnel.c')
| -rw-r--r-- | src/network/networkd-tunnel.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/src/network/networkd-tunnel.c b/src/network/networkd-tunnel.c new file mode 100644 index 0000000000..49a4975522 --- /dev/null +++ b/src/network/networkd-tunnel.c @@ -0,0 +1,192 @@ +/*-*- 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; +} |