402 lines
12 KiB
C
402 lines
12 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 2013 Tom Gundersen <teg@jklm.no>
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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 <ctype.h>
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#include <net/if.h>
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#include "networkd.h"
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#include "networkd-netdev.h"
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#include "network-internal.h"
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#include "path-util.h"
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#include "conf-files.h"
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#include "conf-parser.h"
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#include "util.h"
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static int network_load_one(Manager *manager, const char *filename) {
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_cleanup_network_free_ Network *network = NULL;
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_cleanup_fclose_ FILE *file = NULL;
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Route *route;
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Address *address;
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int r;
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assert(manager);
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assert(filename);
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file = fopen(filename, "re");
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if (!file) {
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if (errno == ENOENT)
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return 0;
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else
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return -errno;
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}
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if (null_or_empty_path(filename)) {
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log_debug("skipping empty file: %s", filename);
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return 0;
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}
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network = new0(Network, 1);
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if (!network)
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return log_oom();
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network->manager = manager;
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LIST_HEAD_INIT(network->static_addresses);
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LIST_HEAD_INIT(network->static_routes);
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network->vlans = hashmap_new(string_hash_func, string_compare_func);
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if (!network->vlans)
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return log_oom();
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network->macvlans = hashmap_new(uint64_hash_func, uint64_compare_func);
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if (!network->macvlans)
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return log_oom();
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network->vxlans = hashmap_new(uint64_hash_func, uint64_compare_func);
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if (!network->vxlans)
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return log_oom();
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network->addresses_by_section = hashmap_new(uint64_hash_func, uint64_compare_func);
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if (!network->addresses_by_section)
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return log_oom();
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network->routes_by_section = hashmap_new(uint64_hash_func, uint64_compare_func);
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if (!network->routes_by_section)
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return log_oom();
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network->filename = strdup(filename);
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if (!network->filename)
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return log_oom();
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network->dhcp_ntp = true;
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network->dhcp_dns = true;
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network->dhcp_hostname = true;
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network->dhcp_domainname = true;
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network->dhcp_routes = true;
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network->dhcp_sendhost = true;
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r = config_parse(NULL, filename, file,
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"Match\0Network\0Address\0Route\0DHCP\0DHCPv4\0",
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config_item_perf_lookup, network_network_gperf_lookup,
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false, false, network);
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if (r < 0) {
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log_warning("Could not parse config file %s: %s", filename, strerror(-r));
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return r;
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}
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LIST_PREPEND(networks, manager->networks, network);
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LIST_FOREACH(routes, route, network->static_routes) {
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if (!route->family) {
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log_warning("Route section without Gateway field configured in %s. "
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"Ignoring", filename);
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return 0;
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}
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}
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LIST_FOREACH(addresses, address, network->static_addresses) {
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if (!address->family) {
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log_warning("Address section without Address field configured in %s. "
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"Ignoring", filename);
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return 0;
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}
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}
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network = NULL;
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return 0;
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}
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int network_load(Manager *manager) {
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Network *network;
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_cleanup_strv_free_ char **files = NULL;
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char **f;
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int r;
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assert(manager);
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while ((network = manager->networks))
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network_free(network);
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r = conf_files_list_strv(&files, ".network", NULL, network_dirs);
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if (r < 0) {
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log_error("Failed to enumerate network files: %s", strerror(-r));
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return r;
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}
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STRV_FOREACH_BACKWARDS(f, files) {
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r = network_load_one(manager, *f);
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if (r < 0)
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return r;
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}
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return 0;
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}
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void network_free(Network *network) {
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NetDev *netdev;
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Route *route;
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Address *address;
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Iterator i;
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if (!network)
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return;
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free(network->filename);
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free(network->match_mac);
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free(network->match_path);
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free(network->match_driver);
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free(network->match_type);
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free(network->match_name);
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free(network->description);
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free(network->dhcp_vendor_class_identifier);
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while ((address = network->ntp)) {
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LIST_REMOVE(addresses, network->ntp, address);
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address_free(address);
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}
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while ((address = network->dns)) {
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LIST_REMOVE(addresses, network->dns, address);
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address_free(address);
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}
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netdev_unref(network->bridge);
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netdev_unref(network->bond);
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netdev_unref(network->tunnel);
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HASHMAP_FOREACH(netdev, network->vlans, i)
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netdev_unref(netdev);
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hashmap_free(network->vlans);
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HASHMAP_FOREACH(netdev, network->macvlans, i)
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netdev_unref(netdev);
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hashmap_free(network->macvlans);
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HASHMAP_FOREACH(netdev, network->vxlans, i)
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netdev_unref(netdev);
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hashmap_free(network->vxlans);
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while ((route = network->static_routes))
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route_free(route);
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while ((address = network->static_addresses))
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address_free(address);
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hashmap_free(network->addresses_by_section);
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hashmap_free(network->routes_by_section);
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if (network->manager && network->manager->networks)
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LIST_REMOVE(networks, network->manager->networks, network);
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condition_free_list(network->match_host);
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condition_free_list(network->match_virt);
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condition_free_list(network->match_kernel);
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condition_free_list(network->match_arch);
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free(network);
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}
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int network_get(Manager *manager, struct udev_device *device,
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const char *ifname, const struct ether_addr *address,
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Network **ret) {
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Network *network;
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assert(manager);
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assert(ret);
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LIST_FOREACH(networks, network, manager->networks) {
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if (net_match_config(network->match_mac, network->match_path,
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network->match_driver, network->match_type,
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network->match_name, network->match_host,
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network->match_virt, network->match_kernel,
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network->match_arch,
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address,
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udev_device_get_property_value(device, "ID_PATH"),
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udev_device_get_driver(udev_device_get_parent(device)),
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udev_device_get_property_value(device, "ID_NET_DRIVER"),
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udev_device_get_devtype(device),
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ifname)) {
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log_debug("%-*s: found matching network '%s'", IFNAMSIZ, ifname,
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network->filename);
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*ret = network;
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return 0;
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}
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}
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*ret = NULL;
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return -ENOENT;
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}
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int network_apply(Manager *manager, Network *network, Link *link) {
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int r;
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link->network = network;
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if (network->dns || network->ntp) {
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r = link_save(link);
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if (r < 0)
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return r;
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}
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return 0;
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}
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int config_parse_netdev(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Network *network = userdata;
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_cleanup_free_ char *kind_string = NULL;
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char *p;
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NetDev *netdev;
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NetDevKind kind;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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kind_string = strdup(lvalue);
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if (!kind_string)
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return log_oom();
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/* the keys are CamelCase versions of the kind */
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for (p = kind_string; *p; p++)
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*p = tolower(*p);
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kind = netdev_kind_from_string(kind_string);
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if (kind == _NETDEV_KIND_INVALID) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Invalid NetDev kind: %s", lvalue);
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return 0;
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}
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r = netdev_get(network->manager, rvalue, &netdev);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"%s could not be found, ignoring assignment: %s", lvalue, rvalue);
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return 0;
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}
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if (netdev->kind != kind) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"NetDev is not a %s, ignoring assignment: %s", lvalue, rvalue);
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return 0;
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}
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switch (kind) {
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case NETDEV_KIND_BRIDGE:
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network->bridge = netdev;
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break;
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case NETDEV_KIND_BOND:
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network->bond = netdev;
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break;
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case NETDEV_KIND_VLAN:
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r = hashmap_put(network->vlans, &netdev->vlanid, netdev);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Can not add VLAN to network: %s", rvalue);
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return 0;
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}
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break;
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case NETDEV_KIND_MACVLAN:
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r = hashmap_put(network->macvlans, netdev->ifname, netdev);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Can not add MACVLAN to network: %s", rvalue);
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return 0;
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}
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break;
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case NETDEV_KIND_VXLAN:
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r = hashmap_put(network->vxlans, netdev->ifname, netdev);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Can not add VXLAN to network: %s", rvalue);
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return 0;
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}
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break;
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default:
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assert_not_reached("Can not parse NetDev");
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}
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netdev_ref(netdev);
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return 0;
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}
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int config_parse_tunnel(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Network *network = userdata;
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NetDev *netdev;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = netdev_get(network->manager, rvalue, &netdev);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Tunnel is invalid, ignoring assignment: %s", rvalue);
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return 0;
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}
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if (netdev->kind != NETDEV_KIND_IPIP &&
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netdev->kind != NETDEV_KIND_SIT &&
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netdev->kind != NETDEV_KIND_GRE &&
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netdev->kind != NETDEV_KIND_VTI) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"NetDev is not a tunnel, ignoring assignment: %s", rvalue);
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return 0;
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}
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network->tunnel = netdev;
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return 0;
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}
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