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-bus.h"
  30 #include "sd-dhcp-client.h"
  31 #include "udev.h"
  32
  33 #include "rtnl-util.h"
  34 #include "hashmap.h"
  35 #include "list.h"
  36
  37 typedef struct Netdev Netdev;
  38 typedef struct Network Network;
  39 typedef struct Link Link;
  40 typedef struct Address Address;
  41 typedef struct Route Route;
  42 typedef struct Manager Manager;
  43
  44 typedef struct netdev_enslave_callback netdev_enslave_callback;
  45
  46 struct netdev_enslave_callback {
  47         sd_rtnl_message_handler_t callback;
  48         Link *link;
  49
  50         LIST_FIELDS(netdev_enslave_callback, callbacks);
  51 };
  52
  53 typedef enum NetdevKind {
  54         NETDEV_KIND_BRIDGE,
  55         NETDEV_KIND_BOND,
  56         NETDEV_KIND_VLAN,
  57         _NETDEV_KIND_MAX,
  58         _NETDEV_KIND_INVALID = -1
  59 } NetdevKind;
  60
  61 typedef enum NetdevState {
  62         NETDEV_STATE_FAILED,
  63         NETDEV_STATE_CREATING,
  64         NETDEV_STATE_READY,
  65         _NETDEV_STATE_MAX,
  66         _NETDEV_STATE_INVALID = -1,
  67 } NetdevState;
  68
  69 struct Netdev {
  70         Manager *manager;
  71
  72         char *filename;
  73
  74         char *description;
  75         char *name;
  76         NetdevKind kind;
  77
  78         int vlanid;
  79
  80         int ifindex;
  81         NetdevState state;
  82
  83         LIST_HEAD(netdev_enslave_callback, callbacks);
  84 };
  85
  86 struct Network {
  87         Manager *manager;
  88
  89         char *filename;
  90
  91         struct ether_addr *match_mac;
  92         char *match_path;
  93         char *match_driver;
  94         char *match_type;
  95         char *match_name;
  96
  97         char *description;
  98         Netdev *bridge;
  99         Netdev *bond;
 100         Netdev *vlan;
 101         bool dhcp;
 102         bool dhcp_dns;
 103         bool dhcp_mtu;
 104         bool dhcp_hostname;
 105         bool dhcp_domainname;
 106         bool dhcp_critical;
 107
 108         LIST_HEAD(Address, static_addresses);
 109         LIST_HEAD(Route, static_routes);
 110         Address *dns;
 111
 112         Hashmap *addresses_by_section;
 113         Hashmap *routes_by_section;
 114
 115         LIST_FIELDS(Network, networks);
 116 };
 117
 118 struct Address {
 119         Network *network;
 120         uint64_t section;
 121
 122         unsigned char family;
 123         unsigned char prefixlen;
 124         char *label;
 125
 126         struct in_addr broadcast;
 127
 128         union {
 129                 struct in_addr in;
 130                 struct in6_addr in6;
 131         } in_addr;
 132
 133         LIST_FIELDS(Address, static_addresses);
 134 };
 135
 136 struct Route {
 137         Network *network;
 138         uint64_t section;
 139
 140         unsigned char family;
 141         unsigned char dst_prefixlen;
 142
 143         union {
 144                 struct in_addr in;
 145                 struct in6_addr in6;
 146         } in_addr;
 147
 148         union {
 149                 struct in_addr in;
 150                 struct in6_addr in6;
 151         } dst_addr;
 152
 153         LIST_FIELDS(Route, static_routes);
 154 };
 155
 156 typedef enum LinkState {
 157         LINK_STATE_ENSLAVING,
 158         LINK_STATE_SETTING_ADDRESSES,
 159         LINK_STATE_SETTING_ROUTES,
 160         LINK_STATE_CONFIGURED,
 161         LINK_STATE_FAILED,
 162         _LINK_STATE_MAX,
 163         _LINK_STATE_INVALID = -1
 164 } LinkState;
 165
 166 struct Link {
 167         Manager *manager;
 168
 169         uint64_t ifindex;
 170         char *ifname;
 171         struct ether_addr mac;
 172
 173         unsigned flags;
 174
 175         Network *network;
 176
 177         LinkState state;
 178
 179         unsigned addr_messages;
 180         unsigned route_messages;
 181         unsigned enslaving;
 182
 183         sd_dhcp_client *dhcp_client;
 184         sd_dhcp_lease *dhcp_lease;
 185         uint16_t original_mtu;
 186 };
 187
 188 struct Manager {
 189         sd_rtnl *rtnl;
 190         sd_event *event;
 191         sd_bus *bus;
 192         struct udev *udev;
 193         struct udev_monitor *udev_monitor;
 194         sd_event_source *udev_event_source;
 195
 196         Hashmap *links;
 197         Hashmap *netdevs;
 198         LIST_HEAD(Network, networks);
 199
 200         usec_t network_dirs_ts_usec;
 201 };
 202
 203 extern const char* const network_dirs[];
 204
 205 /* Manager */
 206
 207 int manager_new(Manager **ret);
 208 void manager_free(Manager *m);
 209
 210 int manager_load_config(Manager *m);
 211 bool manager_should_reload(Manager *m);
 212
 213 int manager_udev_enumerate_links(Manager *m);
 214 int manager_udev_listen(Manager *m);
 215
 216 int manager_rtnl_listen(Manager *m);
 217 int manager_bus_listen(Manager *m);
 218
 219 int manager_update_resolv_conf(Manager *m);
 220
 221 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 222 #define _cleanup_manager_free_ _cleanup_(manager_freep)
 223
 224 /* Netdev */
 225
 226 int netdev_load(Manager *manager);
 227
 228 void netdev_free(Netdev *netdev);
 229
 230 DEFINE_TRIVIAL_CLEANUP_FUNC(Netdev*, netdev_free);
 231 #define _cleanup_netdev_free_ _cleanup_(netdev_freep)
 232
 233 int netdev_get(Manager *manager, const char *name, Netdev **ret);
 234 int netdev_set_ifindex(Netdev *netdev, int ifindex);
 235 int netdev_enslave(Netdev *netdev, Link *link, sd_rtnl_message_handler_t cb);
 236
 237 const char *netdev_kind_to_string(NetdevKind d) _const_;
 238 NetdevKind netdev_kind_from_string(const char *d) _pure_;
 239
 240 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);
 241
 242 /* Network */
 243
 244 int network_load(Manager *manager);
 245
 246 void network_free(Network *network);
 247
 248 DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
 249 #define _cleanup_network_free_ _cleanup_(network_freep)
 250
 251 int network_get(Manager *manager, struct udev_device *device, Network **ret);
 252 int network_apply(Manager *manager, Network *network, Link *link);
 253
 254 int config_parse_bridge(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 int config_parse_bond(const char *unit, const char *filename, unsigned line,
 259                       const char *section, unsigned section_line, const char *lvalue,
 260                       int ltype, const char *rvalue, void *data, void *userdata);
 261
 262 int config_parse_vlan(const char *unit, const char *filename, unsigned line,
 263                       const char *section, unsigned section_line, const char *lvalue,
 264                       int ltype, const char *rvalue, void *data, void *userdata);
 265
 266 /* gperf */
 267
 268 const struct ConfigPerfItem* network_gperf_lookup(const char *key, unsigned length);
 269
 270 /* Route */
 271 int route_new_static(Network *network, unsigned section, Route **ret);
 272 int route_new_dynamic(Route **ret);
 273 void route_free(Route *route);
 274 int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 275
 276 DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
 277 #define _cleanup_route_free_ _cleanup_(route_freep)
 278
 279 int config_parse_gateway(const char *unit, const char *filename, unsigned line,
 280                          const char *section, unsigned section_line, const char *lvalue,
 281                          int ltype, const char *rvalue, void *data, void *userdata);
 282
 283 int config_parse_destination(const char *unit, const char *filename, unsigned line,
 284                              const char *section, unsigned section_line, const char *lvalue,
 285                              int ltype, const char *rvalue, void *data, void *userdata);
 286
 287 /* Address */
 288 int address_new_static(Network *network, unsigned section, Address **ret);
 289 int address_new_dynamic(Address **ret);
 290 void address_free(Address *address);
 291 int address_configure(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 292 int address_drop(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 293
 294 DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
 295 #define _cleanup_address_free_ _cleanup_(address_freep)
 296
 297 int config_parse_dns(const char *unit, const char *filename, unsigned line,
 298                      const char *section, unsigned section_line, const char *lvalue,
 299                      int ltype, const char *rvalue, void *data, void *userdata);
 300
 301 int config_parse_address(const char *unit, const char *filename, unsigned line,
 302                          const char *section, unsigned section_line, const char *lvalue,
 303                          int ltype, const char *rvalue, void *data, void *userdata);
 304
 305 int config_parse_broadcast(const char *unit, const char *filename, unsigned line,
 306                            const char *section, unsigned section_line, const char *lvalue,
 307                            int ltype, const char *rvalue, void *data, void *userdata);
 308
 309 int config_parse_label(const char *unit, const char *filename, unsigned line,
 310                        const char *section, unsigned section_line, const char *lvalue,
 311                        int ltype, const char *rvalue, void *data, void *userdata);
 312
 313 /* Link */
 314
 315 int link_new(Manager *manager, struct udev_device *device, Link **ret);
 316 void link_free(Link *link);
 317 int link_add(Manager *manager, struct udev_device *device, Link **ret);
 318 int link_configure(Link *link);
 319
 320 int link_update(Link *link, sd_rtnl_message *message);
 321
 322 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_free);
 323 #define _cleanup_link_free_ _cleanup_(link_freep)
 324
 325 /* Macros which append INTERFACE= to the message */
 326
 327 #define log_full_link(level, link, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", link->ifname, "%s: " fmt, link->ifname, ##__VA_ARGS__)
 328 #define log_debug_link(link, ...)       log_full_link(LOG_DEBUG, link, ##__VA_ARGS__)
 329 #define log_info_link(link, ...)        log_full_link(LOG_INFO, link, ##__VA_ARGS__)
 330 #define log_notice_link(link, ...)      log_full_link(LOG_NOTICE, link, ##__VA_ARGS__)
 331 #define log_warning_link(link, ...)     log_full_link(LOG_WARNING, link, ##__VA_ARGS__)
 332 #define log_error_link(link, ...)       log_full_link(LOG_ERR, link, ##__VA_ARGS__)
 333
 334 #define log_struct_link(level, link, ...) log_struct(level, "INTERFACE=%s", link->ifname, __VA_ARGS__)
 335
 336 /* More macros which append INTERFACE= to the message */
 337
 338 #define log_full_netdev(level, netdev, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", netdev->name, "%s: " fmt, netdev->name, ##__VA_ARGS__)
 339 #define log_debug_netdev(netdev, ...)       log_full_netdev(LOG_DEBUG, netdev, ##__VA_ARGS__)
 340 #define log_info_netdev(netdev, ...)        log_full_netdev(LOG_INFO, netdev, ##__VA_ARGS__)
 341 #define log_notice_netdev(netdev, ...)      log_full_netdev(LOG_NOTICE, netdev, ##__VA_ARGS__)
 342 #define log_warning_netdev(netdev, ...)     log_full_netdev(LOG_WARNING, netdev,## __VA_ARGS__)
 343 #define log_error_netdev(netdev, ...)       log_full_netdev(LOG_ERR, netdev, ##__VA_ARGS__)
 344
 345 #define log_struct_netdev(level, netdev, ...) log_struct(level, "INTERFACE=%s", netdev->name, __VA_ARGS__)
 346
 347 #define NETDEV(netdev) "INTERFACE=%s", netdev->name
 348 #define ADDRESS_FMT_VAL(address)            \
 349         (address).s_addr & 0xFF,            \
 350         ((address).s_addr >> 8) & 0xFF,     \
 351         ((address).s_addr >> 16) & 0xFF,    \
 352         (address).s_addr >> 24