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         bool dhcp_domainname;
  93
  94         LIST_HEAD(Address, static_addresses);
  95         LIST_HEAD(Route, static_routes);
  96         Address *dns;
  97
  98         Hashmap *addresses_by_section;
  99         Hashmap *routes_by_section;
 100
 101         LIST_FIELDS(Network, networks);
 102 };
 103
 104 struct Address {
 105         Network *network;
 106         uint64_t section;
 107
 108         unsigned char family;
 109         unsigned char prefixlen;
 110         char *label;
 111
 112         struct in_addr netmask;
 113
 114         union {
 115                 struct in_addr in;
 116                 struct in6_addr in6;
 117         } in_addr;
 118
 119         LIST_FIELDS(Address, static_addresses);
 120 };
 121
 122 struct Route {
 123         Network *network;
 124         uint64_t section;
 125
 126         unsigned char family;
 127         unsigned char dst_family;
 128         unsigned char dst_prefixlen;
 129
 130         union {
 131                 struct in_addr in;
 132                 struct in6_addr in6;
 133         } in_addr;
 134
 135         union {
 136                 struct in_addr in;
 137                 struct in6_addr in6;
 138         } dst_addr;
 139
 140         LIST_FIELDS(Route, static_routes);
 141 };
 142
 143 typedef enum LinkState {
 144         LINK_STATE_JOINING_BRIDGE,
 145         LINK_STATE_SETTING_ADDRESSES,
 146         LINK_STATE_SETTING_ROUTES,
 147         LINK_STATE_CONFIGURED,
 148         LINK_STATE_FAILED,
 149         _LINK_STATE_MAX,
 150         _LINK_STATE_INVALID = -1
 151 } LinkState;
 152
 153 struct Link {
 154         Manager *manager;
 155
 156         uint64_t ifindex;
 157         char *ifname;
 158         struct ether_addr mac;
 159
 160         unsigned flags;
 161
 162         Network *network;
 163
 164         Route *dhcp_route;
 165         Address *dhcp_address;
 166         Address *dns;
 167         uint16_t original_mtu;
 168
 169         LinkState state;
 170
 171         unsigned addr_messages;
 172         unsigned route_messages;
 173
 174         sd_dhcp_client *dhcp;
 175 };
 176
 177 struct Manager {
 178         sd_rtnl *rtnl;
 179         sd_event *event;
 180         sd_bus *bus;
 181         struct udev *udev;
 182         struct udev_monitor *udev_monitor;
 183         sd_event_source *udev_event_source;
 184
 185         Hashmap *links;
 186         Hashmap *bridges;
 187         LIST_HEAD(Network, networks);
 188
 189         usec_t network_dirs_ts_usec;
 190 };
 191
 192 extern const char* const network_dirs[];
 193
 194 /* Manager */
 195
 196 int manager_new(Manager **ret);
 197 void manager_free(Manager *m);
 198
 199 int manager_load_config(Manager *m);
 200 bool manager_should_reload(Manager *m);
 201
 202 int manager_udev_enumerate_links(Manager *m);
 203 int manager_udev_listen(Manager *m);
 204
 205 int manager_rtnl_listen(Manager *m);
 206 int manager_bus_listen(Manager *m);
 207
 208 int manager_update_resolv_conf(Manager *m);
 209
 210 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 211 #define _cleanup_manager_free_ _cleanup_(manager_freep)
 212
 213 /* Bridge */
 214
 215 int bridge_load(Manager *manager);
 216
 217 void bridge_free(Bridge *bridge);
 218
 219 DEFINE_TRIVIAL_CLEANUP_FUNC(Bridge*, bridge_free);
 220 #define _cleanup_bridge_free_ _cleanup_(bridge_freep)
 221
 222 int bridge_get(Manager *manager, const char *name, Bridge **ret);
 223 int bridge_set_link(Manager *m, Link *link);
 224 int bridge_join(Bridge *bridge, Link *link, sd_rtnl_message_handler_t cb);
 225
 226 /* Network */
 227
 228 int network_load(Manager *manager);
 229
 230 void network_free(Network *network);
 231
 232 DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
 233 #define _cleanup_network_free_ _cleanup_(network_freep)
 234
 235 int network_get(Manager *manager, struct udev_device *device, Network **ret);
 236 int network_apply(Manager *manager, Network *network, Link *link);
 237
 238 int config_parse_bridge(const char *unit, const char *filename, unsigned line,
 239                         const char *section, unsigned section_line, const char *lvalue,
 240                         int ltype, const char *rvalue, void *data, void *userdata);
 241
 242 /* gperf */
 243
 244 const struct ConfigPerfItem* network_gperf_lookup(const char *key, unsigned length);
 245
 246 /* Route */
 247 int route_new_static(Network *network, unsigned section, Route **ret);
 248 int route_new_dynamic(Route **ret);
 249 void route_free(Route *route);
 250 int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 251
 252 DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
 253 #define _cleanup_route_free_ _cleanup_(route_freep)
 254
 255 int config_parse_gateway(const char *unit, const char *filename, unsigned line,
 256                          const char *section, unsigned section_line, const char *lvalue,
 257                          int ltype, const char *rvalue, void *data, void *userdata);
 258
 259 int config_parse_destination(const char *unit, const char *filename, unsigned line,
 260                              const char *section, unsigned section_line, const char *lvalue,
 261                              int ltype, const char *rvalue, void *data, void *userdata);
 262
 263 /* Address */
 264 int address_new_static(Network *network, unsigned section, Address **ret);
 265 int address_new_dynamic(Address **ret);
 266 void address_free(Address *address);
 267 int address_configure(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 268 int address_drop(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 269
 270 DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
 271 #define _cleanup_address_free_ _cleanup_(address_freep)
 272
 273 int config_parse_dns(const char *unit, const char *filename, unsigned line,
 274                      const char *section, unsigned section_line, const char *lvalue,
 275                      int ltype, const char *rvalue, void *data, void *userdata);
 276
 277 int config_parse_address(const char *unit, const char *filename, unsigned line,
 278                          const char *section, unsigned section_line, const char *lvalue,
 279                          int ltype, const char *rvalue, void *data, void *userdata);
 280
 281 int config_parse_label(const char *unit, const char *filename, unsigned line,
 282                        const char *section, unsigned section_line, const char *lvalue,
 283                        int ltype, const char *rvalue, void *data, void *userdata);
 284
 285 /* Link */
 286
 287 int link_new(Manager *manager, struct udev_device *device, Link **ret);
 288 void link_free(Link *link);
 289 int link_add(Manager *manager, struct udev_device *device, Link **ret);
 290 int link_configure(Link *link);
 291
 292 int link_update(Link *link, sd_rtnl_message *message);
 293
 294 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_free);
 295 #define _cleanup_link_free_ _cleanup_(link_freep)
 296
 297 /* Macros which append INTERFACE= to the message */
 298
 299 #define log_full_link(level, link, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", link->ifname, "%s: " fmt, link->ifname, ##__VA_ARGS__)
 300 #define log_debug_link(link, ...)       log_full_link(LOG_DEBUG, link, ##__VA_ARGS__)
 301 #define log_info_link(link, ...)        log_full_link(LOG_INFO, link, ##__VA_ARGS__)
 302 #define log_notice_link(link, ...)      log_full_link(LOG_NOTICE, link, ##__VA_ARGS__)
 303 #define log_warning_link(link, ...)     log_full_link(LOG_WARNING, link, ##__VA_ARGS__)
 304 #define log_error_link(link, ...)       log_full_link(LOG_ERR, link, ##__VA_ARGS__)
 305
 306 #define log_struct_link(level, link, ...) log_struct(level, "INTERFACE=%s", link->ifname, __VA_ARGS__)
 307
 308 /* More macros which append INTERFACE= to the message */
 309
 310 #define log_full_bridge(level, bridge, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", bridge->name, "%s: " fmt, bridge->name, ##__VA_ARGS__)
 311 #define log_debug_bridge(bridge, ...)       log_full_bridge(LOG_DEBUG, bridge, ##__VA_ARGS__)
 312 #define log_info_bridge(bridge, ...)        log_full_bridge(LOG_INFO, bridge, ##__VA_ARGS__)
 313 #define log_notice_bridge(bridge, ...)      log_full_bridge(LOG_NOTICE, bridge, ##__VA_ARGS__)
 314 #define log_warning_bridge(bridge, ...)     log_full_bridge(LOG_WARNING, bridge,## __VA_ARGS__)
 315 #define log_error_bridge(bridge, ...)       log_full_bridge(LOG_ERR, bridge, ##__VA_ARGS__)
 316
 317 #define log_struct_bridge(level, bridge, ...) log_struct(level, "INTERFACE=%s", bridge->name, __VA_ARGS__)
 318
 319 #define BRIDGE(bridge) "INTERFACE=%s", bridge->name
 320 #define ADDRESS_FMT_VAL(address)            \
 321         (address).s_addr & 0xFF,            \
 322         ((address).s_addr >> 8) & 0xFF,     \
 323         ((address).s_addr >> 16) & 0xFF,    \
 324         (address).s_addr >> 24