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
  26 #include "sd-event.h"
  27 #include "sd-rtnl.h"
  28 #include "sd-bus.h"
  29 #include "sd-dhcp-client.h"
  30 #include "sd-ipv4ll.h"
  31 #include "udev.h"
  32
  33 #include "rtnl-util.h"
  34 #include "hashmap.h"
  35 #include "list.h"
  36 #include "set.h"
  37 #include "condition-util.h"
  38
  39 #define CACHE_INFO_INFINITY_LIFE_TIME 0xFFFFFFFFU
  40
  41 typedef struct NetDev NetDev;
  42 typedef struct Network Network;
  43 typedef struct Link Link;
  44 typedef struct Address Address;
  45 typedef struct Route Route;
  46 typedef struct Manager Manager;
  47
  48 typedef struct netdev_enslave_callback netdev_enslave_callback;
  49
  50 struct netdev_enslave_callback {
  51         sd_rtnl_message_handler_t callback;
  52         Link *link;
  53
  54         LIST_FIELDS(netdev_enslave_callback, callbacks);
  55 };
  56
  57 typedef enum MacVlanMode {
  58         NETDEV_MACVLAN_MODE_PRIVATE = MACVLAN_MODE_PRIVATE,
  59         NETDEV_MACVLAN_MODE_VEPA = MACVLAN_MODE_VEPA,
  60         NETDEV_MACVLAN_MODE_BRIDGE = MACVLAN_MODE_BRIDGE,
  61         NETDEV_MACVLAN_MODE_PASSTHRU = MACVLAN_MODE_PASSTHRU,
  62         _NETDEV_MACVLAN_MODE_MAX,
  63         _NETDEV_MACVLAN_MODE_INVALID = -1
  64 } MacVlanMode;
  65
  66 typedef enum NetDevKind {
  67         NETDEV_KIND_BRIDGE,
  68         NETDEV_KIND_BOND,
  69         NETDEV_KIND_VLAN,
  70         NETDEV_KIND_MACVLAN,
  71         NETDEV_KIND_IPIP,
  72         NETDEV_KIND_GRE,
  73         NETDEV_KIND_SIT,
  74         _NETDEV_KIND_MAX,
  75         _NETDEV_KIND_INVALID = -1
  76 } NetDevKind;
  77
  78 typedef enum NetDevState {
  79         NETDEV_STATE_FAILED,
  80         NETDEV_STATE_CREATING,
  81         NETDEV_STATE_READY,
  82         NETDEV_STATE_LINGER,
  83         _NETDEV_STATE_MAX,
  84         _NETDEV_STATE_INVALID = -1,
  85 } NetDevState;
  86
  87 struct NetDev {
  88         Manager *manager;
  89
  90         int n_ref;
  91
  92         char *filename;
  93
  94         Condition *match_host;
  95         Condition *match_virt;
  96         Condition *match_kernel;
  97         Condition *match_arch;
  98
  99         char *description;
 100         char *ifname;
 101         size_t mtu;
 102         NetDevKind kind;
 103
 104         uint64_t vlanid;
 105         int32_t macvlan_mode;
 106
 107         int ifindex;
 108         NetDevState state;
 109
 110         unsigned tunnel_ttl;
 111         unsigned tunnel_tos;
 112         struct in_addr tunnel_local;
 113         struct in_addr tunnel_remote;
 114
 115         LIST_HEAD(netdev_enslave_callback, callbacks);
 116 };
 117
 118 struct Network {
 119         Manager *manager;
 120
 121         char *filename;
 122
 123         struct ether_addr *match_mac;
 124         char *match_path;
 125         char *match_driver;
 126         char *match_type;
 127         char *match_name;
 128         Condition *match_host;
 129         Condition *match_virt;
 130         Condition *match_kernel;
 131         Condition *match_arch;
 132
 133         char *description;
 134         NetDev *bridge;
 135         NetDev *bond;
 136         NetDev *tunnel;
 137         Hashmap *vlans;
 138         Hashmap *macvlans;
 139         bool dhcp;
 140         bool dhcp_dns;
 141         bool dhcp_mtu;
 142         bool dhcp_hostname;
 143         bool dhcp_domainname;
 144         bool dhcp_critical;
 145         bool ipv4ll;
 146
 147         LIST_HEAD(Address, static_addresses);
 148         LIST_HEAD(Route, static_routes);
 149
 150         Hashmap *addresses_by_section;
 151         Hashmap *routes_by_section;
 152
 153         LIST_HEAD(Address, dns);
 154
 155         LIST_FIELDS(Network, networks);
 156 };
 157
 158 struct Address {
 159         Network *network;
 160         uint64_t section;
 161
 162         unsigned char family;
 163         unsigned char prefixlen;
 164         unsigned char scope;
 165         char *label;
 166
 167         struct in_addr broadcast;
 168         struct ifa_cacheinfo cinfo;
 169
 170         union {
 171                 struct in_addr in;
 172                 struct in6_addr in6;
 173         } in_addr;
 174
 175         LIST_FIELDS(Address, addresses);
 176 };
 177
 178 struct Route {
 179         Network *network;
 180         uint64_t section;
 181
 182         unsigned char family;
 183         unsigned char dst_prefixlen;
 184         unsigned char scope;
 185         uint32_t metrics;
 186
 187         union {
 188                 struct in_addr in;
 189                 struct in6_addr in6;
 190         } in_addr;
 191
 192         union {
 193                 struct in_addr in;
 194                 struct in6_addr in6;
 195         } dst_addr;
 196
 197         LIST_FIELDS(Route, routes);
 198 };
 199
 200 typedef enum LinkState {
 201         LINK_STATE_INITIALIZING,
 202         LINK_STATE_ENSLAVING,
 203         LINK_STATE_SETTING_ADDRESSES,
 204         LINK_STATE_SETTING_ROUTES,
 205         LINK_STATE_CONFIGURED,
 206         LINK_STATE_UNMANAGED,
 207         LINK_STATE_FAILED,
 208         LINK_STATE_LINGER,
 209         _LINK_STATE_MAX,
 210         _LINK_STATE_INVALID = -1
 211 } LinkState;
 212
 213 struct Link {
 214         Manager *manager;
 215
 216         int n_ref;
 217
 218         uint64_t ifindex;
 219         char *ifname;
 220         char *state_file;
 221         struct ether_addr mac;
 222         struct udev_device *udev_device;
 223
 224         unsigned flags;
 225         uint8_t operstate;
 226
 227         Network *network;
 228
 229         LinkState state;
 230
 231         unsigned addr_messages;
 232         unsigned route_messages;
 233         unsigned enslaving;
 234
 235         LIST_HEAD(Address, addresses);
 236
 237         sd_dhcp_client *dhcp_client;
 238         sd_dhcp_lease *dhcp_lease;
 239         char *lease_file;
 240         uint16_t original_mtu;
 241         sd_ipv4ll *ipv4ll;
 242 };
 243
 244 struct Manager {
 245         sd_rtnl *rtnl;
 246         sd_event *event;
 247         sd_bus *bus;
 248         struct udev *udev;
 249         struct udev_monitor *udev_monitor;
 250         sd_event_source *udev_event_source;
 251         sd_event_source *sigterm_event_source;
 252         sd_event_source *sigint_event_source;
 253
 254         char *state_file;
 255
 256         Hashmap *links;
 257         Hashmap *netdevs;
 258         LIST_HEAD(Network, networks);
 259
 260         usec_t network_dirs_ts_usec;
 261         struct kmod_ctx *kmod_ctx;
 262 };
 263
 264 extern const char* const network_dirs[];
 265
 266 /* Manager */
 267
 268 int manager_new(Manager **ret);
 269 void manager_free(Manager *m);
 270
 271 int manager_load_config(Manager *m);
 272 bool manager_should_reload(Manager *m);
 273
 274 int manager_rtnl_enumerate_links(Manager *m);
 275
 276 int manager_rtnl_listen(Manager *m);
 277 int manager_udev_listen(Manager *m);
 278 int manager_bus_listen(Manager *m);
 279
 280 int manager_save(Manager *m);
 281
 282 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 283 #define _cleanup_manager_free_ _cleanup_(manager_freep)
 284
 285 /* NetDev */
 286
 287 int netdev_load(Manager *manager);
 288 void netdev_drop(NetDev *netdev);
 289
 290 NetDev *netdev_unref(NetDev *netdev);
 291 NetDev *netdev_ref(NetDev *netdev);
 292
 293 DEFINE_TRIVIAL_CLEANUP_FUNC(NetDev*, netdev_unref);
 294 #define _cleanup_netdev_unref_ _cleanup_(netdev_unrefp)
 295
 296 int netdev_get(Manager *manager, const char *name, NetDev **ret);
 297 int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *newlink);
 298 int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t cb);
 299 int netdev_create_tunnel(Link *link, sd_rtnl_message_handler_t callback);
 300
 301 const char *netdev_kind_to_string(NetDevKind d) _const_;
 302 NetDevKind netdev_kind_from_string(const char *d) _pure_;
 303
 304 const char *macvlan_mode_to_string(MacVlanMode d) _const_;
 305 MacVlanMode macvlan_mode_from_string(const char *d) _pure_;
 306
 307 int config_parse_netdev_kind(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 308
 309 int config_parse_macvlan_mode(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 310
 311 /* gperf */
 312 const struct ConfigPerfItem* network_netdev_gperf_lookup(const char *key, unsigned length);
 313
 314 /* Network */
 315
 316 int network_load(Manager *manager);
 317
 318 void network_free(Network *network);
 319
 320 DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
 321 #define _cleanup_network_free_ _cleanup_(network_freep)
 322
 323 int network_get(Manager *manager, struct udev_device *device,
 324                 const char *ifname, const struct ether_addr *mac,
 325                 Network **ret);
 326 int network_apply(Manager *manager, Network *network, Link *link);
 327
 328 int config_parse_netdev(const char *unit, const char *filename, unsigned line,
 329                         const char *section, unsigned section_line, const char *lvalue,
 330                         int ltype, const char *rvalue, void *data, void *userdata);
 331
 332 int config_parse_tunnel(const char *unit,
 333                         const char *filename,
 334                         unsigned line,
 335                         const char *section,
 336                         unsigned section_line,
 337                         const char *lvalue,
 338                         int ltype,
 339                         const char *rvalue,
 340                         void *data,
 341                         void *userdata);
 342
 343 int config_parse_tunnel_address(const char *unit,
 344                                 const char *filename,
 345                                 unsigned line,
 346                                 const char *section,
 347                                 unsigned section_line,
 348                                 const char *lvalue,
 349                                 int ltype,
 350                                 const char *rvalue,
 351                                 void *data,
 352                                 void *userdata);
 353
 354 /* gperf */
 355 const struct ConfigPerfItem* network_network_gperf_lookup(const char *key, unsigned length);
 356
 357 /* Route */
 358 int route_new_static(Network *network, unsigned section, Route **ret);
 359 int route_new_dynamic(Route **ret);
 360 void route_free(Route *route);
 361 int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 362 int route_drop(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 363
 364
 365 DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
 366 #define _cleanup_route_free_ _cleanup_(route_freep)
 367
 368 int config_parse_gateway(const char *unit, const char *filename, unsigned line,
 369                          const char *section, unsigned section_line, const char *lvalue,
 370                          int ltype, const char *rvalue, void *data, void *userdata);
 371
 372 int config_parse_destination(const char *unit, const char *filename, unsigned line,
 373                              const char *section, unsigned section_line, const char *lvalue,
 374                              int ltype, const char *rvalue, void *data, void *userdata);
 375
 376 /* Address */
 377 int address_new_static(Network *network, unsigned section, Address **ret);
 378 int address_new_dynamic(Address **ret);
 379 void address_free(Address *address);
 380 int address_configure(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 381 int address_update(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 382 int address_drop(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 383 bool address_equal(Address *a1, Address *a2);
 384
 385 DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
 386 #define _cleanup_address_free_ _cleanup_(address_freep)
 387
 388 int config_parse_dns(const char *unit, const char *filename, unsigned line,
 389                      const char *section, unsigned section_line, const char *lvalue,
 390                      int ltype, const char *rvalue, void *data, void *userdata);
 391
 392 int config_parse_address(const char *unit, const char *filename, unsigned line,
 393                          const char *section, unsigned section_line, const char *lvalue,
 394                          int ltype, const char *rvalue, void *data, void *userdata);
 395
 396 int config_parse_broadcast(const char *unit, const char *filename, unsigned line,
 397                            const char *section, unsigned section_line, const char *lvalue,
 398                            int ltype, const char *rvalue, void *data, void *userdata);
 399
 400 int config_parse_label(const char *unit, const char *filename, unsigned line,
 401                        const char *section, unsigned section_line, const char *lvalue,
 402                        int ltype, const char *rvalue, void *data, void *userdata);
 403
 404 /* Link */
 405
 406 Link *link_unref(Link *link);
 407 Link *link_ref(Link *link);
 408 int link_get(Manager *m, int ifindex, Link **ret);
 409 int link_add(Manager *manager, sd_rtnl_message *message, Link **ret);
 410 void link_drop(Link *link);
 411
 412 int link_update(Link *link, sd_rtnl_message *message);
 413 int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata);
 414
 415 int link_initialized(Link *link, struct udev_device *device);
 416
 417 int link_save(Link *link);
 418
 419 bool link_has_carrier(unsigned flags, uint8_t operstate);
 420
 421 const char* link_state_to_string(LinkState s) _const_;
 422 LinkState link_state_from_string(const char *s) _pure_;
 423
 424 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
 425 #define _cleanup_link_unref_ _cleanup_(link_unrefp)
 426
 427 /* Macros which append INTERFACE= to the message */
 428
 429 #define log_full_link(level, link, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", link->ifname, "%*s: " fmt, IFNAMSIZ, link->ifname, ##__VA_ARGS__)
 430 #define log_debug_link(link, ...)       log_full_link(LOG_DEBUG, link, ##__VA_ARGS__)
 431 #define log_info_link(link, ...)        log_full_link(LOG_INFO, link, ##__VA_ARGS__)
 432 #define log_notice_link(link, ...)      log_full_link(LOG_NOTICE, link, ##__VA_ARGS__)
 433 #define log_warning_link(link, ...)     log_full_link(LOG_WARNING, link, ##__VA_ARGS__)
 434 #define log_error_link(link, ...)       log_full_link(LOG_ERR, link, ##__VA_ARGS__)
 435
 436 #define log_struct_link(level, link, ...) log_struct(level, "INTERFACE=%s", link->ifname, __VA_ARGS__)
 437
 438 /* More macros which append INTERFACE= to the message */
 439
 440 #define log_full_netdev(level, netdev, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", netdev->ifname, "%*s: " fmt, IFNAMSIZ, netdev->ifname, ##__VA_ARGS__)
 441 #define log_debug_netdev(netdev, ...)       log_full_netdev(LOG_DEBUG, netdev, ##__VA_ARGS__)
 442 #define log_info_netdev(netdev, ...)        log_full_netdev(LOG_INFO, netdev, ##__VA_ARGS__)
 443 #define log_notice_netdev(netdev, ...)      log_full_netdev(LOG_NOTICE, netdev, ##__VA_ARGS__)
 444 #define log_warning_netdev(netdev, ...)     log_full_netdev(LOG_WARNING, netdev,## __VA_ARGS__)
 445 #define log_error_netdev(netdev, ...)       log_full_netdev(LOG_ERR, netdev, ##__VA_ARGS__)
 446
 447 #define log_struct_netdev(level, netdev, ...) log_struct(level, "INTERFACE=%s", netdev->ifname, __VA_ARGS__)
 448
 449 #define NETDEV(netdev) "INTERFACE=%s", netdev->ifname
 450 #define ADDRESS_FMT_VAL(address)            \
 451         (address).s_addr & 0xFF,            \
 452         ((address).s_addr >> 8) & 0xFF,     \
 453         ((address).s_addr >> 16) & 0xFF,    \
 454         (address).s_addr >> 24