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