src/network/networkd.h

   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 #pragma once
  23
  24 #include <arpa/inet.h>
  25 #include <linux/rtnetlink.h>
  26
  27 #include "sd-event.h"
  28 #include "sd-rtnl.h"
  29 #include "sd-dhcp-client.h"
  30 #include "udev.h"
  31
  32 #include "rtnl-util.h"
  33 #include "hashmap.h"
  34 #include "list.h"
  35
  36 typedef struct Bridge Bridge;
  37 typedef struct Network Network;
  38 typedef struct Link Link;
  39 typedef struct Address Address;
  40 typedef struct Route Route;
  41 typedef struct Manager Manager;
  42
  43 typedef struct bridge_join_callback bridge_join_callback;
  44
  45 struct bridge_join_callback {
  46         sd_rtnl_message_handler_t callback;
  47         Link *link;
  48
  49         LIST_FIELDS(bridge_join_callback, callbacks);
  50 };
  51
  52 typedef enum BridgeState {
  53         BRIDGE_STATE_FAILED,
  54         BRIDGE_STATE_CREATING,
  55         BRIDGE_STATE_READY,
  56         _BRIDGE_STATE_MAX,
  57         _BRIDGE_STATE_INVALID = -1,
  58 } BridgeState;
  59
  60 struct Bridge {
  61         Manager *manager;
  62
  63         char *filename;
  64
  65         char *description;
  66         char *name;
  67
  68         Link *link;
  69         BridgeState state;
  70
  71         LIST_HEAD(bridge_join_callback, callbacks);
  72 };
  73
  74 struct Network {
  75         Manager *manager;
  76
  77         char *filename;
  78
  79         struct ether_addr *match_mac;
  80         char *match_path;
  81         char *match_driver;
  82         char *match_type;
  83         char *match_name;
  84
  85         char *description;
  86         Bridge *bridge;
  87         bool dhcp;
  88
  89         LIST_HEAD(Address, static_addresses);
  90         LIST_HEAD(Route, static_routes);
  91         Address *dns;
  92
  93         Hashmap *addresses_by_section;
  94         Hashmap *routes_by_section;
  95
  96         LIST_FIELDS(Network, networks);
  97 };
  98
  99 struct Address {
 100         Network *network;
 101         uint64_t section;
 102
 103         unsigned char family;
 104         unsigned char prefixlen;
 105         char *label;
 106
 107         struct in_addr netmask;
 108
 109         union {
 110                 struct in_addr in;
 111                 struct in6_addr in6;
 112         } in_addr;
 113
 114         LIST_FIELDS(Address, static_addresses);
 115 };
 116
 117 struct Route {
 118         Network *network;
 119         uint64_t section;
 120
 121         unsigned char family;
 122         unsigned char dst_family;
 123         unsigned char dst_prefixlen;
 124
 125         union {
 126                 struct in_addr in;
 127                 struct in6_addr in6;
 128         } in_addr;
 129
 130         union {
 131                 struct in_addr in;
 132                 struct in6_addr in6;
 133         } dst_addr;
 134
 135         LIST_FIELDS(Route, static_routes);
 136 };
 137
 138 typedef enum LinkState {
 139         LINK_STATE_JOINING_BRIDGE,
 140         LINK_STATE_SETTING_ADDRESSES,
 141         LINK_STATE_SETTING_ROUTES,
 142         LINK_STATE_CONFIGURED,
 143         LINK_STATE_FAILED,
 144         _LINK_STATE_MAX,
 145         _LINK_STATE_INVALID = -1
 146 } LinkState;
 147
 148 struct Link {
 149         Manager *manager;
 150
 151         uint64_t ifindex;
 152         char *ifname;
 153         struct ether_addr mac;
 154
 155         unsigned flags;
 156
 157         Network *network;
 158
 159         Route *dhcp_route;
 160         Address *dhcp_address;
 161         Address *dns;
 162
 163         LinkState state;
 164
 165         unsigned addr_messages;
 166         unsigned route_messages;
 167
 168         sd_dhcp_client *dhcp;
 169 };
 170
 171 struct Manager {
 172         sd_rtnl *rtnl;
 173         sd_event *event;
 174         struct udev *udev;
 175         struct udev_monitor *udev_monitor;
 176         sd_event_source *udev_event_source;
 177
 178         Hashmap *links;
 179         Hashmap *bridges;
 180         LIST_HEAD(Network, networks);
 181
 182         usec_t network_dirs_ts_usec;
 183 };
 184
 185 extern const char* const network_dirs[];
 186
 187 /* Manager */
 188
 189 int manager_new(Manager **ret);
 190 void manager_free(Manager *m);
 191
 192 int manager_load_config(Manager *m);
 193 bool manager_should_reload(Manager *m);
 194
 195 int manager_udev_enumerate_links(Manager *m);
 196 int manager_udev_listen(Manager *m);
 197
 198 int manager_rtnl_listen(Manager *m);
 199
 200 int manager_update_resolv_conf(Manager *m);
 201
 202 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 203 #define _cleanup_manager_free_ _cleanup_(manager_freep)
 204
 205 /* Bridge */
 206
 207 int bridge_load(Manager *manager);
 208
 209 void bridge_free(Bridge *bridge);
 210
 211 DEFINE_TRIVIAL_CLEANUP_FUNC(Bridge*, bridge_free);
 212 #define _cleanup_bridge_free_ _cleanup_(bridge_freep)
 213
 214 int bridge_get(Manager *manager, const char *name, Bridge **ret);
 215 int bridge_set_link(Manager *m, Link *link);
 216 int bridge_join(Bridge *bridge, Link *link, sd_rtnl_message_handler_t cb);
 217
 218 /* Network */
 219
 220 int network_load(Manager *manager);
 221
 222 void network_free(Network *network);
 223
 224 DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
 225 #define _cleanup_network_free_ _cleanup_(network_freep)
 226
 227 int network_get(Manager *manager, struct udev_device *device, Network **ret);
 228 int network_apply(Manager *manager, Network *network, Link *link);
 229
 230 int config_parse_bridge(const char *unit, const char *filename, unsigned line,
 231                         const char *section, unsigned section_line, const char *lvalue,
 232                         int ltype, const char *rvalue, void *data, void *userdata);
 233
 234 /* gperf */
 235
 236 const struct ConfigPerfItem* network_gperf_lookup(const char *key, unsigned length);
 237
 238 /* Route */
 239 int route_new_static(Network *network, unsigned section, Route **ret);
 240 int route_new_dynamic(Route **ret);
 241 void route_free(Route *route);
 242 int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 243
 244 DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
 245 #define _cleanup_route_free_ _cleanup_(route_freep)
 246
 247 int config_parse_gateway(const char *unit, const char *filename, unsigned line,
 248                          const char *section, unsigned section_line, const char *lvalue,
 249                          int ltype, const char *rvalue, void *data, void *userdata);
 250
 251 int config_parse_destination(const char *unit, const char *filename, unsigned line,
 252                              const char *section, unsigned section_line, const char *lvalue,
 253                              int ltype, const char *rvalue, void *data, void *userdata);
 254
 255 /* Address */
 256 int address_new_static(Network *network, unsigned section, Address **ret);
 257 int address_new_dynamic(Address **ret);
 258 void address_free(Address *address);
 259 int address_configure(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 260 int address_drop(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 261
 262 DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
 263 #define _cleanup_address_free_ _cleanup_(address_freep)
 264
 265 int config_parse_dns(const char *unit, const char *filename, unsigned line,
 266                      const char *section, unsigned section_line, const char *lvalue,
 267                      int ltype, const char *rvalue, void *data, void *userdata);
 268
 269 int config_parse_address(const char *unit, const char *filename, unsigned line,
 270                          const char *section, unsigned section_line, const char *lvalue,
 271                          int ltype, const char *rvalue, void *data, void *userdata);
 272
 273 int config_parse_label(const char *unit, const char *filename, unsigned line,
 274                        const char *section, unsigned section_line, const char *lvalue,
 275                        int ltype, const char *rvalue, void *data, void *userdata);
 276
 277 /* Link */
 278
 279 int link_new(Manager *manager, struct udev_device *device, Link **ret);
 280 void link_free(Link *link);
 281 int link_add(Manager *manager, struct udev_device *device, Link **ret);
 282 int link_configure(Link *link);
 283
 284 int link_update(Link *link, sd_rtnl_message *message);
 285
 286 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_free);
 287 #define _cleanup_link_free_ _cleanup_(link_freep)
 288
 289 /* Macros which append INTERFACE= to the message */
 290
 291 #define log_full_link(level, link, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", link->ifname, "%s: " fmt, link->ifname, ##__VA_ARGS__)
 292 #define log_debug_link(link, ...)       log_full_link(LOG_DEBUG, link, ##__VA_ARGS__)
 293 #define log_info_link(link, ...)        log_full_link(LOG_INFO, link, ##__VA_ARGS__)
 294 #define log_notice_link(link, ...)      log_full_link(LOG_NOTICE, link, ##__VA_ARGS__)
 295 #define log_warning_link(link, ...)     log_full_link(LOG_WARNING, link, ##__VA_ARGS__)
 296 #define log_error_link(link, ...)       log_full_link(LOG_ERR, link, ##__VA_ARGS__)
 297
 298 #define log_struct_link(level, link, ...) log_struct(level, "INTERFACE=%s", link->ifname, __VA_ARGS__)
 299
 300 /* More macros which append INTERFACE= to the message */
 301
 302 #define log_full_bridge(level, bridge, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", bridge->name, "%s: " fmt, bridge->name, ##__VA_ARGS__)
 303 #define log_debug_bridge(bridge, ...)       log_full_bridge(LOG_DEBUG, bridge, ##__VA_ARGS__)
 304 #define log_info_bridge(bridge, ...)        log_full_bridge(LOG_INFO, bridge, ##__VA_ARGS__)
 305 #define log_notice_bridge(bridge, ...)      log_full_bridge(LOG_NOTICE, bridge, ##__VA_ARGS__)
 306 #define log_warning_bridge(bridge, ...)     log_full_bridge(LOG_WARNING, bridge,## __VA_ARGS__)
 307 #define log_error_bridge(bridge, ...)       log_full_bridge(LOG_ERR, bridge, ##__VA_ARGS__)
 308
 309 #define log_struct_bridge(level, bridge, ...) log_struct(level, "INTERFACE=%s", bridge->name, __VA_ARGS__)
 310
 311 #define BRIDGE(bridge) "INTERFACE=%s", bridge->name
 312 #define ADDRESS_FMT_VAL(address)            \
 313         (address).s_addr & 0xFF,            \
 314         ((address).s_addr >> 8) & 0xFF,     \
 315         ((address).s_addr >> 16) & 0xFF,    \
 316         (address).s_addr >> 24