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 Bridge Bridge;
  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 bridge_join_callback bridge_join_callback;
  45
  46 struct bridge_join_callback {
  47         sd_rtnl_message_handler_t callback;
  48         Link *link;
  49
  50         LIST_FIELDS(bridge_join_callback, callbacks);
  51 };
  52
  53 typedef enum BridgeState {
  54         BRIDGE_STATE_FAILED,
  55         BRIDGE_STATE_CREATING,
  56         BRIDGE_STATE_READY,
  57         _BRIDGE_STATE_MAX,
  58         _BRIDGE_STATE_INVALID = -1,
  59 } BridgeState;
  60
  61 struct Bridge {
  62         Manager *manager;
  63
  64         char *filename;
  65
  66         char *description;
  67         char *name;
  68
  69         Link *link;
  70         BridgeState state;
  71
  72         LIST_HEAD(bridge_join_callback, callbacks);
  73 };
  74
  75 struct Network {
  76         Manager *manager;
  77
  78         char *filename;
  79
  80         struct ether_addr *match_mac;
  81         char *match_path;
  82         char *match_driver;
  83         char *match_type;
  84         char *match_name;
  85
  86         char *description;
  87         Bridge *bridge;
  88         bool dhcp;
  89         bool dhcp_dns;
  90         bool dhcp_mtu;
  91         bool dhcp_hostname;
  92
  93         LIST_HEAD(Address, static_addresses);
  94         LIST_HEAD(Route, static_routes);
  95         Address *dns;
  96
  97         Hashmap *addresses_by_section;
  98         Hashmap *routes_by_section;
  99
 100         LIST_FIELDS(Network, networks);
 101 };
 102
 103 struct Address {
 104         Network *network;
 105         uint64_t section;
 106
 107         unsigned char family;
 108         unsigned char prefixlen;
 109         char *label;
 110
 111         struct in_addr netmask;
 112
 113         union {
 114                 struct in_addr in;
 115                 struct in6_addr in6;
 116         } in_addr;
 117
 118         LIST_FIELDS(Address, static_addresses);
 119 };
 120
 121 struct Route {
 122         Network *network;
 123         uint64_t section;
 124
 125         unsigned char family;
 126         unsigned char dst_family;
 127         unsigned char dst_prefixlen;
 128
 129         union {
 130                 struct in_addr in;
 131                 struct in6_addr in6;
 132         } in_addr;
 133
 134         union {
 135                 struct in_addr in;
 136                 struct in6_addr in6;
 137         } dst_addr;
 138
 139         LIST_FIELDS(Route, static_routes);
 140 };
 141
 142 typedef enum LinkState {
 143         LINK_STATE_JOINING_BRIDGE,
 144         LINK_STATE_SETTING_ADDRESSES,
 145         LINK_STATE_SETTING_ROUTES,
 146         LINK_STATE_CONFIGURED,
 147         LINK_STATE_FAILED,
 148         _LINK_STATE_MAX,
 149         _LINK_STATE_INVALID = -1
 150 } LinkState;
 151
 152 struct Link {
 153         Manager *manager;
 154
 155         uint64_t ifindex;
 156         char *ifname;
 157         struct ether_addr mac;
 158
 159         unsigned flags;
 160
 161         Network *network;
 162
 163         Route *dhcp_route;
 164         Address *dhcp_address;
 165         Address *dns;
 166         uint16_t original_mtu;
 167
 168         LinkState state;
 169
 170         unsigned addr_messages;
 171         unsigned route_messages;
 172
 173         sd_dhcp_client *dhcp;
 174 };
 175
 176 struct Manager {
 177         sd_rtnl *rtnl;
 178         sd_event *event;
 179         sd_bus *bus;
 180         struct udev *udev;
 181         struct udev_monitor *udev_monitor;
 182         sd_event_source *udev_event_source;
 183
 184         Hashmap *links;
 185         Hashmap *bridges;
 186         LIST_HEAD(Network, networks);
 187
 188         usec_t network_dirs_ts_usec;
 189 };
 190
 191 extern const char* const network_dirs[];
 192
 193 /* Manager */
 194
 195 int manager_new(Manager **ret);
 196 void manager_free(Manager *m);
 197
 198 int manager_load_config(Manager *m);
 199 bool manager_should_reload(Manager *m);
 200
 201 int manager_udev_enumerate_links(Manager *m);
 202 int manager_udev_listen(Manager *m);
 203
 204 int manager_rtnl_listen(Manager *m);
 205 int manager_bus_listen(Manager *m);
 206
 207 int manager_update_resolv_conf(Manager *m);
 208
 209 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 210 #define _cleanup_manager_free_ _cleanup_(manager_freep)
 211
 212 /* Bridge */
 213
 214 int bridge_load(Manager *manager);
 215
 216 void bridge_free(Bridge *bridge);
 217
 218 DEFINE_TRIVIAL_CLEANUP_FUNC(Bridge*, bridge_free);
 219 #define _cleanup_bridge_free_ _cleanup_(bridge_freep)
 220
 221 int bridge_get(Manager *manager, const char *name, Bridge **ret);
 222 int bridge_set_link(Manager *m, Link *link);
 223 int bridge_join(Bridge *bridge, Link *link, sd_rtnl_message_handler_t cb);
 224
 225 /* Network */
 226
 227 int network_load(Manager *manager);
 228
 229 void network_free(Network *network);
 230
 231 DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
 232 #define _cleanup_network_free_ _cleanup_(network_freep)
 233
 234 int network_get(Manager *manager, struct udev_device *device, Network **ret);
 235 int network_apply(Manager *manager, Network *network, Link *link);
 236
 237 int config_parse_bridge(const char *unit, const char *filename, unsigned line,
 238                         const char *section, unsigned section_line, const char *lvalue,
 239                         int ltype, const char *rvalue, void *data, void *userdata);
 240
 241 /* gperf */
 242
 243 const struct ConfigPerfItem* network_gperf_lookup(const char *key, unsigned length);
 244
 245 /* Route */
 246 int route_new_static(Network *network, unsigned section, Route **ret);
 247 int route_new_dynamic(Route **ret);
 248 void route_free(Route *route);
 249 int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 250
 251 DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
 252 #define _cleanup_route_free_ _cleanup_(route_freep)
 253
 254 int config_parse_gateway(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_destination(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 /* Address */
 263 int address_new_static(Network *network, unsigned section, Address **ret);
 264 int address_new_dynamic(Address **ret);
 265 void address_free(Address *address);
 266 int address_configure(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 267 int address_drop(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 268
 269 DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
 270 #define _cleanup_address_free_ _cleanup_(address_freep)
 271
 272 int config_parse_dns(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_address(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 int config_parse_label(const char *unit, const char *filename, unsigned line,
 281                        const char *section, unsigned section_line, const char *lvalue,
 282                        int ltype, const char *rvalue, void *data, void *userdata);
 283
 284 /* Link */
 285
 286 int link_new(Manager *manager, struct udev_device *device, Link **ret);
 287 void link_free(Link *link);
 288 int link_add(Manager *manager, struct udev_device *device, Link **ret);
 289 int link_configure(Link *link);
 290
 291 int link_update(Link *link, sd_rtnl_message *message);
 292
 293 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_free);
 294 #define _cleanup_link_free_ _cleanup_(link_freep)
 295
 296 /* Macros which append INTERFACE= to the message */
 297
 298 #define log_full_link(level, link, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", link->ifname, "%s: " fmt, link->ifname, ##__VA_ARGS__)
 299 #define log_debug_link(link, ...)       log_full_link(LOG_DEBUG, link, ##__VA_ARGS__)
 300 #define log_info_link(link, ...)        log_full_link(LOG_INFO, link, ##__VA_ARGS__)
 301 #define log_notice_link(link, ...)      log_full_link(LOG_NOTICE, link, ##__VA_ARGS__)
 302 #define log_warning_link(link, ...)     log_full_link(LOG_WARNING, link, ##__VA_ARGS__)
 303 #define log_error_link(link, ...)       log_full_link(LOG_ERR, link, ##__VA_ARGS__)
 304
 305 #define log_struct_link(level, link, ...) log_struct(level, "INTERFACE=%s", link->ifname, __VA_ARGS__)
 306
 307 /* More macros which append INTERFACE= to the message */
 308
 309 #define log_full_bridge(level, bridge, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", bridge->name, "%s: " fmt, bridge->name, ##__VA_ARGS__)
 310 #define log_debug_bridge(bridge, ...)       log_full_bridge(LOG_DEBUG, bridge, ##__VA_ARGS__)
 311 #define log_info_bridge(bridge, ...)        log_full_bridge(LOG_INFO, bridge, ##__VA_ARGS__)
 312 #define log_notice_bridge(bridge, ...)      log_full_bridge(LOG_NOTICE, bridge, ##__VA_ARGS__)
 313 #define log_warning_bridge(bridge, ...)     log_full_bridge(LOG_WARNING, bridge,## __VA_ARGS__)
 314 #define log_error_bridge(bridge, ...)       log_full_bridge(LOG_ERR, bridge, ##__VA_ARGS__)
 315
 316 #define log_struct_bridge(level, bridge, ...) log_struct(level, "INTERFACE=%s", bridge->name, __VA_ARGS__)
 317
 318 #define BRIDGE(bridge) "INTERFACE=%s", bridge->name
 319 #define ADDRESS_FMT_VAL(address)            \
 320         (address).s_addr & 0xFF,            \
 321         ((address).s_addr >> 8) & 0xFF,     \
 322         ((address).s_addr >> 16) & 0xFF,    \
 323         (address).s_addr >> 24