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         Set *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, static_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, static_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         sd_dhcp_client *dhcp_client;
 236         sd_dhcp_lease *dhcp_lease;
 237         char *lease_file;
 238         uint16_t original_mtu;
 239         sd_ipv4ll *ipv4ll;
 240 };
 241
 242 struct Manager {
 243         sd_rtnl *rtnl;
 244         sd_event *event;
 245         sd_bus *bus;
 246         struct udev *udev;
 247         struct udev_monitor *udev_monitor;
 248         sd_event_source *udev_event_source;
 249         sd_event_source *sigterm_event_source;
 250         sd_event_source *sigint_event_source;
 251
 252         char *state_file;
 253
 254         Hashmap *links;
 255         Hashmap *netdevs;
 256         LIST_HEAD(Network, networks);
 257
 258         usec_t network_dirs_ts_usec;
 259         struct kmod_ctx *kmod_ctx;
 260 };
 261
 262 extern const char* const network_dirs[];
 263
 264 /* Manager */
 265
 266 int manager_new(Manager **ret);
 267 void manager_free(Manager *m);
 268
 269 int manager_load_config(Manager *m);
 270 bool manager_should_reload(Manager *m);
 271
 272 int manager_rtnl_enumerate_links(Manager *m);
 273
 274 int manager_rtnl_listen(Manager *m);
 275 int manager_udev_listen(Manager *m);
 276 int manager_bus_listen(Manager *m);
 277
 278 int manager_update_resolv_conf(Manager *m);
 279 int manager_save(Manager *m);
 280
 281 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 282 #define _cleanup_manager_free_ _cleanup_(manager_freep)
 283
 284 /* NetDev */
 285
 286 int netdev_load(Manager *manager);
 287 void netdev_drop(NetDev *netdev);
 288
 289 NetDev *netdev_unref(NetDev *netdev);
 290 NetDev *netdev_ref(NetDev *netdev);
 291
 292 DEFINE_TRIVIAL_CLEANUP_FUNC(NetDev*, netdev_unref);
 293 #define _cleanup_netdev_unref_ _cleanup_(netdev_unrefp)
 294
 295 int netdev_get(Manager *manager, const char *name, NetDev **ret);
 296 int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *newlink);
 297 int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t cb);
 298 int netdev_create_tunnel(Link *link, sd_rtnl_message_handler_t callback);
 299
 300 const char *netdev_kind_to_string(NetDevKind d) _const_;
 301 NetDevKind netdev_kind_from_string(const char *d) _pure_;
 302
 303 const char *macvlan_mode_to_string(MacVlanMode d) _const_;
 304 MacVlanMode macvlan_mode_from_string(const char *d) _pure_;
 305
 306 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);
 307
 308 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);
 309
 310 /* gperf */
 311 const struct ConfigPerfItem* network_netdev_gperf_lookup(const char *key, unsigned length);
 312
 313 /* Network */
 314
 315 int network_load(Manager *manager);
 316
 317 void network_free(Network *network);
 318
 319 DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
 320 #define _cleanup_network_free_ _cleanup_(network_freep)
 321
 322 int network_get(Manager *manager, struct udev_device *device,
 323                 const char *ifname, const struct ether_addr *mac,
 324                 Network **ret);
 325 int network_apply(Manager *manager, Network *network, Link *link);
 326
 327 int config_parse_netdev(const char *unit, const char *filename, unsigned line,
 328                         const char *section, unsigned section_line, const char *lvalue,
 329                         int ltype, const char *rvalue, void *data, void *userdata);
 330
 331 int config_parse_tunnel(const char *unit,
 332                         const char *filename,
 333                         unsigned line,
 334                         const char *section,
 335                         unsigned section_line,
 336                         const char *lvalue,
 337                         int ltype,
 338                         const char *rvalue,
 339                         void *data,
 340                         void *userdata);
 341
 342 int config_parse_tunnel_address(const char *unit,
 343                                 const char *filename,
 344                                 unsigned line,
 345                                 const char *section,
 346                                 unsigned section_line,
 347                                 const char *lvalue,
 348                                 int ltype,
 349                                 const char *rvalue,
 350                                 void *data,
 351                                 void *userdata);
 352
 353 /* gperf */
 354 const struct ConfigPerfItem* network_network_gperf_lookup(const char *key, unsigned length);
 355
 356 /* Route */
 357 int route_new_static(Network *network, unsigned section, Route **ret);
 358 int route_new_dynamic(Route **ret);
 359 void route_free(Route *route);
 360 int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 361 int route_drop(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 362
 363
 364 DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
 365 #define _cleanup_route_free_ _cleanup_(route_freep)
 366
 367 int config_parse_gateway(const char *unit, const char *filename, unsigned line,
 368                          const char *section, unsigned section_line, const char *lvalue,
 369                          int ltype, const char *rvalue, void *data, void *userdata);
 370
 371 int config_parse_destination(const char *unit, const char *filename, unsigned line,
 372                              const char *section, unsigned section_line, const char *lvalue,
 373                              int ltype, const char *rvalue, void *data, void *userdata);
 374
 375 /* Address */
 376 int address_new_static(Network *network, unsigned section, Address **ret);
 377 int address_new_dynamic(Address **ret);
 378 void address_free(Address *address);
 379 int address_configure(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 380 int address_update(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 381 int address_drop(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 382
 383 DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
 384 #define _cleanup_address_free_ _cleanup_(address_freep)
 385
 386 int config_parse_dns(const char *unit, const char *filename, unsigned line,
 387                      const char *section, unsigned section_line, const char *lvalue,
 388                      int ltype, const char *rvalue, void *data, void *userdata);
 389
 390 int config_parse_address(const char *unit, const char *filename, unsigned line,
 391                          const char *section, unsigned section_line, const char *lvalue,
 392                          int ltype, const char *rvalue, void *data, void *userdata);
 393
 394 int config_parse_broadcast(const char *unit, const char *filename, unsigned line,
 395                            const char *section, unsigned section_line, const char *lvalue,
 396                            int ltype, const char *rvalue, void *data, void *userdata);
 397
 398 int config_parse_label(const char *unit, const char *filename, unsigned line,
 399                        const char *section, unsigned section_line, const char *lvalue,
 400                        int ltype, const char *rvalue, void *data, void *userdata);
 401
 402 /* Link */
 403
 404 Link *link_unref(Link *link);
 405 Link *link_ref(Link *link);
 406 int link_get(Manager *m, int ifindex, Link **ret);
 407 int link_add(Manager *manager, sd_rtnl_message *message, Link **ret);
 408 void link_drop(Link *link);
 409
 410 int link_update(Link *link, sd_rtnl_message *message);
 411 int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata);
 412
 413 int link_initialized(Link *link, struct udev_device *device);
 414
 415 int link_save(Link *link);
 416
 417 bool link_has_carrier(unsigned flags, uint8_t operstate);
 418
 419 const char* link_state_to_string(LinkState s) _const_;
 420 LinkState link_state_from_string(const char *s) _pure_;
 421
 422 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
 423 #define _cleanup_link_unref_ _cleanup_(link_unrefp)
 424
 425 /* Macros which append INTERFACE= to the message */
 426
 427 #define log_full_link(level, link, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", link->ifname, "%*s: " fmt, IFNAMSIZ, link->ifname, ##__VA_ARGS__)
 428 #define log_debug_link(link, ...)       log_full_link(LOG_DEBUG, link, ##__VA_ARGS__)
 429 #define log_info_link(link, ...)        log_full_link(LOG_INFO, link, ##__VA_ARGS__)
 430 #define log_notice_link(link, ...)      log_full_link(LOG_NOTICE, link, ##__VA_ARGS__)
 431 #define log_warning_link(link, ...)     log_full_link(LOG_WARNING, link, ##__VA_ARGS__)
 432 #define log_error_link(link, ...)       log_full_link(LOG_ERR, link, ##__VA_ARGS__)
 433
 434 #define log_struct_link(level, link, ...) log_struct(level, "INTERFACE=%s", link->ifname, __VA_ARGS__)
 435
 436 /* More macros which append INTERFACE= to the message */
 437
 438 #define log_full_netdev(level, netdev, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", netdev->ifname, "%*s: " fmt, IFNAMSIZ, netdev->ifname, ##__VA_ARGS__)
 439 #define log_debug_netdev(netdev, ...)       log_full_netdev(LOG_DEBUG, netdev, ##__VA_ARGS__)
 440 #define log_info_netdev(netdev, ...)        log_full_netdev(LOG_INFO, netdev, ##__VA_ARGS__)
 441 #define log_notice_netdev(netdev, ...)      log_full_netdev(LOG_NOTICE, netdev, ##__VA_ARGS__)
 442 #define log_warning_netdev(netdev, ...)     log_full_netdev(LOG_WARNING, netdev,## __VA_ARGS__)
 443 #define log_error_netdev(netdev, ...)       log_full_netdev(LOG_ERR, netdev, ##__VA_ARGS__)
 444
 445 #define log_struct_netdev(level, netdev, ...) log_struct(level, "INTERFACE=%s", netdev->ifname, __VA_ARGS__)
 446
 447 #define NETDEV(netdev) "INTERFACE=%s", netdev->ifname
 448 #define ADDRESS_FMT_VAL(address)            \
 449         (address).s_addr & 0xFF,            \
 450         ((address).s_addr >> 8) & 0xFF,     \
 451         ((address).s_addr >> 16) & 0xFF,    \
 452         (address).s_addr >> 24