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         bool dhcp_dns;
  89         bool dhcp_mtu;
  90
  91         LIST_HEAD(Address, static_addresses);
  92         LIST_HEAD(Route, static_routes);
  93         Address *dns;
  94
  95         Hashmap *addresses_by_section;
  96         Hashmap *routes_by_section;
  97
  98         LIST_FIELDS(Network, networks);
  99 };
 100
 101 struct Address {
 102         Network *network;
 103         uint64_t section;
 104
 105         unsigned char family;
 106         unsigned char prefixlen;
 107         char *label;
 108
 109         struct in_addr netmask;
 110
 111         union {
 112                 struct in_addr in;
 113                 struct in6_addr in6;
 114         } in_addr;
 115
 116         LIST_FIELDS(Address, static_addresses);
 117 };
 118
 119 struct Route {
 120         Network *network;
 121         uint64_t section;
 122
 123         unsigned char family;
 124         unsigned char dst_family;
 125         unsigned char dst_prefixlen;
 126
 127         union {
 128                 struct in_addr in;
 129                 struct in6_addr in6;
 130         } in_addr;
 131
 132         union {
 133                 struct in_addr in;
 134                 struct in6_addr in6;
 135         } dst_addr;
 136
 137         LIST_FIELDS(Route, static_routes);
 138 };
 139
 140 typedef enum LinkState {
 141         LINK_STATE_JOINING_BRIDGE,
 142         LINK_STATE_SETTING_ADDRESSES,
 143         LINK_STATE_SETTING_ROUTES,
 144         LINK_STATE_CONFIGURED,
 145         LINK_STATE_FAILED,
 146         _LINK_STATE_MAX,
 147         _LINK_STATE_INVALID = -1
 148 } LinkState;
 149
 150 struct Link {
 151         Manager *manager;
 152
 153         uint64_t ifindex;
 154         char *ifname;
 155         struct ether_addr mac;
 156
 157         unsigned flags;
 158
 159         Network *network;
 160
 161         Route *dhcp_route;
 162         Address *dhcp_address;
 163         Address *dns;
 164         uint16_t original_mtu;
 165
 166         LinkState state;
 167
 168         unsigned addr_messages;
 169         unsigned route_messages;
 170
 171         sd_dhcp_client *dhcp;
 172 };
 173
 174 struct Manager {
 175         sd_rtnl *rtnl;
 176         sd_event *event;
 177         struct udev *udev;
 178         struct udev_monitor *udev_monitor;
 179         sd_event_source *udev_event_source;
 180
 181         Hashmap *links;
 182         Hashmap *bridges;
 183         LIST_HEAD(Network, networks);
 184
 185         usec_t network_dirs_ts_usec;
 186 };
 187
 188 extern const char* const network_dirs[];
 189
 190 /* Manager */
 191
 192 int manager_new(Manager **ret);
 193 void manager_free(Manager *m);
 194
 195 int manager_load_config(Manager *m);
 196 bool manager_should_reload(Manager *m);
 197
 198 int manager_udev_enumerate_links(Manager *m);
 199 int manager_udev_listen(Manager *m);
 200
 201 int manager_rtnl_listen(Manager *m);
 202
 203 int manager_update_resolv_conf(Manager *m);
 204
 205 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 206 #define _cleanup_manager_free_ _cleanup_(manager_freep)
 207
 208 /* Bridge */
 209
 210 int bridge_load(Manager *manager);
 211
 212 void bridge_free(Bridge *bridge);
 213
 214 DEFINE_TRIVIAL_CLEANUP_FUNC(Bridge*, bridge_free);
 215 #define _cleanup_bridge_free_ _cleanup_(bridge_freep)
 216
 217 int bridge_get(Manager *manager, const char *name, Bridge **ret);
 218 int bridge_set_link(Manager *m, Link *link);
 219 int bridge_join(Bridge *bridge, Link *link, sd_rtnl_message_handler_t cb);
 220
 221 /* Network */
 222
 223 int network_load(Manager *manager);
 224
 225 void network_free(Network *network);
 226
 227 DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
 228 #define _cleanup_network_free_ _cleanup_(network_freep)
 229
 230 int network_get(Manager *manager, struct udev_device *device, Network **ret);
 231 int network_apply(Manager *manager, Network *network, Link *link);
 232
 233 int config_parse_bridge(const char *unit, const char *filename, unsigned line,
 234                         const char *section, unsigned section_line, const char *lvalue,
 235                         int ltype, const char *rvalue, void *data, void *userdata);
 236
 237 /* gperf */
 238
 239 const struct ConfigPerfItem* network_gperf_lookup(const char *key, unsigned length);
 240
 241 /* Route */
 242 int route_new_static(Network *network, unsigned section, Route **ret);
 243 int route_new_dynamic(Route **ret);
 244 void route_free(Route *route);
 245 int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 246
 247 DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
 248 #define _cleanup_route_free_ _cleanup_(route_freep)
 249
 250 int config_parse_gateway(const char *unit, const char *filename, unsigned line,
 251                          const char *section, unsigned section_line, const char *lvalue,
 252                          int ltype, const char *rvalue, void *data, void *userdata);
 253
 254 int config_parse_destination(const char *unit, const char *filename, unsigned line,
 255                              const char *section, unsigned section_line, const char *lvalue,
 256                              int ltype, const char *rvalue, void *data, void *userdata);
 257
 258 /* Address */
 259 int address_new_static(Network *network, unsigned section, Address **ret);
 260 int address_new_dynamic(Address **ret);
 261 void address_free(Address *address);
 262 int address_configure(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 263 int address_drop(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 264
 265 DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
 266 #define _cleanup_address_free_ _cleanup_(address_freep)
 267
 268 int config_parse_dns(const char *unit, const char *filename, unsigned line,
 269                      const char *section, unsigned section_line, const char *lvalue,
 270                      int ltype, const char *rvalue, void *data, void *userdata);
 271
 272 int config_parse_address(const char *unit, const char *filename, unsigned line,
 273                          const char *section, unsigned section_line, const char *lvalue,
 274                          int ltype, const char *rvalue, void *data, void *userdata);
 275
 276 int config_parse_label(const char *unit, const char *filename, unsigned line,
 277                        const char *section, unsigned section_line, const char *lvalue,
 278                        int ltype, const char *rvalue, void *data, void *userdata);
 279
 280 /* Link */
 281
 282 int link_new(Manager *manager, struct udev_device *device, Link **ret);
 283 void link_free(Link *link);
 284 int link_add(Manager *manager, struct udev_device *device, Link **ret);
 285 int link_configure(Link *link);
 286
 287 int link_update(Link *link, sd_rtnl_message *message);
 288
 289 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_free);
 290 #define _cleanup_link_free_ _cleanup_(link_freep)
 291
 292 /* Macros which append INTERFACE= to the message */
 293
 294 #define log_full_link(level, link, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", link->ifname, "%s: " fmt, link->ifname, ##__VA_ARGS__)
 295 #define log_debug_link(link, ...)       log_full_link(LOG_DEBUG, link, ##__VA_ARGS__)
 296 #define log_info_link(link, ...)        log_full_link(LOG_INFO, link, ##__VA_ARGS__)
 297 #define log_notice_link(link, ...)      log_full_link(LOG_NOTICE, link, ##__VA_ARGS__)
 298 #define log_warning_link(link, ...)     log_full_link(LOG_WARNING, link, ##__VA_ARGS__)
 299 #define log_error_link(link, ...)       log_full_link(LOG_ERR, link, ##__VA_ARGS__)
 300
 301 #define log_struct_link(level, link, ...) log_struct(level, "INTERFACE=%s", link->ifname, __VA_ARGS__)
 302
 303 /* More macros which append INTERFACE= to the message */
 304
 305 #define log_full_bridge(level, bridge, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", bridge->name, "%s: " fmt, bridge->name, ##__VA_ARGS__)
 306 #define log_debug_bridge(bridge, ...)       log_full_bridge(LOG_DEBUG, bridge, ##__VA_ARGS__)
 307 #define log_info_bridge(bridge, ...)        log_full_bridge(LOG_INFO, bridge, ##__VA_ARGS__)
 308 #define log_notice_bridge(bridge, ...)      log_full_bridge(LOG_NOTICE, bridge, ##__VA_ARGS__)
 309 #define log_warning_bridge(bridge, ...)     log_full_bridge(LOG_WARNING, bridge,## __VA_ARGS__)
 310 #define log_error_bridge(bridge, ...)       log_full_bridge(LOG_ERR, bridge, ##__VA_ARGS__)
 311
 312 #define log_struct_bridge(level, bridge, ...) log_struct(level, "INTERFACE=%s", bridge->name, __VA_ARGS__)
 313
 314 #define BRIDGE(bridge) "INTERFACE=%s", bridge->name
 315 #define ADDRESS_FMT_VAL(address)            \
 316         (address).s_addr & 0xFF,            \
 317         ((address).s_addr >> 8) & 0xFF,     \
 318         ((address).s_addr >> 16) & 0xFF,    \
 319         (address).s_addr >> 24