src/network/networkd-network.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2013 Tom Gundersen <teg@jklm.no>
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include "networkd.h"
  23 #include "net-util.h"
  24 #include "path-util.h"
  25 #include "conf-files.h"
  26 #include "conf-parser.h"
  27 #include "util.h"
  28
  29 static int network_load_one(Manager *manager, const char *filename) {
  30         _cleanup_network_free_ Network *network = NULL;
  31         _cleanup_fclose_ FILE *file = NULL;
  32         Route *route;
  33         Address *address;
  34         int r;
  35
  36         assert(manager);
  37         assert(filename);
  38
  39         file = fopen(filename, "re");
  40         if (!file) {
  41                 if (errno == ENOENT)
  42                         return 0;
  43                 else
  44                         return errno;
  45         }
  46
  47         network = new0(Network, 1);
  48         if (!network)
  49                 return log_oom();
  50
  51         network->manager = manager;
  52
  53         LIST_HEAD_INIT(network->static_addresses);
  54         LIST_HEAD_INIT(network->static_routes);
  55
  56         network->addresses_by_section = hashmap_new(uint64_hash_func, uint64_compare_func);
  57         if (!network->addresses_by_section)
  58                 return log_oom();
  59
  60         network->routes_by_section = hashmap_new(uint64_hash_func, uint64_compare_func);
  61         if (!network->routes_by_section)
  62                 return log_oom();
  63
  64         network->filename = strdup(filename);
  65         if (!network->filename)
  66                 return log_oom();
  67
  68         r = config_parse(NULL, filename, file, "Match\0Network\0Address\0Route\0", config_item_perf_lookup,
  69                         (void*) network_gperf_lookup, false, false, network);
  70         if (r < 0) {
  71                 log_warning("Could not parse config file %s: %s", filename, strerror(-r));
  72                 return r;
  73         }
  74
  75         LIST_PREPEND(networks, manager->networks, network);
  76
  77         LIST_FOREACH(static_routes, route, network->static_routes) {
  78                 if (!route->family) {
  79                         log_warning("Route section without Gateway field configured in %s. "
  80                                     "Ignoring", filename);
  81                         return 0;
  82                 }
  83
  84                 if (route->dst_family && route->family != route->dst_family) {
  85                         log_warning("Route section with conflicting Gateway and Destination address "
  86                                     "family configured in %s. Ignoring", filename);
  87                         return 0;
  88                 }
  89         }
  90
  91         LIST_FOREACH(static_addresses, address, network->static_addresses) {
  92                 if (!address->family) {
  93                         log_warning("Address section without Address field configured in %s. "
  94                                     "Ignoring", filename);
  95                         return 0;
  96                 }
  97         }
  98
  99         network = NULL;
 100
 101         return 0;
 102 }
 103
 104 int network_load(Manager *manager) {
 105         Network *network;
 106         _cleanup_strv_free_ char **files = NULL;
 107         char **f;
 108         int r;
 109
 110         assert(manager);
 111
 112         while ((network = manager->networks))
 113                 network_free(network);
 114
 115         r = conf_files_list_strv(&files, ".network", NULL, network_dirs);
 116         if (r < 0) {
 117                 log_error("Failed to enumerate network files: %s", strerror(-r));
 118                 return r;
 119         }
 120
 121         STRV_FOREACH_BACKWARDS(f, files) {
 122                 r = network_load_one(manager, *f);
 123                 if (r < 0)
 124                         return r;
 125         }
 126
 127         return 0;
 128 }
 129
 130 void network_free(Network *network) {
 131         Route *route;
 132         Address *address;
 133
 134         if (!network)
 135                 return;
 136
 137         free(network->filename);
 138
 139         free(network->match_mac);
 140         free(network->match_path);
 141         free(network->match_driver);
 142         free(network->match_type);
 143         free(network->match_name);
 144
 145         free(network->description);
 146
 147         while ((route = network->static_routes))
 148                 route_free(route);
 149
 150         while ((address = network->static_addresses))
 151                 address_free(address);
 152
 153         hashmap_free(network->addresses_by_section);
 154         hashmap_free(network->routes_by_section);
 155
 156         if (network->manager && network->manager->networks)
 157                 LIST_REMOVE(networks, network->manager->networks, network);
 158
 159         free(network);
 160 }
 161
 162 int network_get(Manager *manager, struct udev_device *device, Network **ret) {
 163         Network *network;
 164
 165         assert(manager);
 166         assert(device);
 167         assert(ret);
 168
 169         if (manager_should_reload(manager))
 170                 manager_load_config(manager);
 171
 172         LIST_FOREACH(networks, network, manager->networks) {
 173                 if (net_match_config(network->match_mac, network->match_path,
 174                                         network->match_driver, network->match_type,
 175                                         network->match_name,
 176                                         udev_device_get_sysattr_value(device, "address"),
 177                                         udev_device_get_property_value(device, "ID_PATH"),
 178                                         udev_device_get_driver(device),
 179                                         udev_device_get_devtype(device),
 180                                         udev_device_get_sysname(device))) {
 181                         log_debug("%s: found matching network '%s'",
 182                                         udev_device_get_sysname(device),
 183                                         network->filename);
 184                         *ret = network;
 185                         return 0;
 186                 }
 187         }
 188
 189         *ret = NULL;
 190
 191         return -ENOENT;
 192 }
 193
 194 int network_apply(Manager *manager, Network *network, Link *link) {
 195         int r;
 196
 197         link->network = network;
 198
 199         r = link_configure(link);
 200         if (r < 0)
 201                 return r;
 202
 203         return 0;
 204 }
 205
 206 int config_parse_bridge(const char *unit,
 207                 const char *filename,
 208                 unsigned line,
 209                 const char *section,
 210                 unsigned section_line,
 211                 const char *lvalue,
 212                 int ltype,
 213                 const char *rvalue,
 214                 void *data,
 215                 void *userdata) {
 216         Network *network = userdata;
 217         Bridge *bridge;
 218         int r;
 219
 220         assert(filename);
 221         assert(lvalue);
 222         assert(rvalue);
 223         assert(data);
 224
 225         r = bridge_get(network->manager, rvalue, &bridge);
 226         if (r < 0) {
 227                 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
 228                            "Bridge is invalid, ignoring assignment: %s", rvalue);
 229                 return 0;
 230         }
 231
 232         network->bridge = bridge;
 233
 234         return 0;
 235 }