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-dhcp-client.h"
  30 #include "udev.h"
  31
  32 #include "rtnl-util.h"
  33 #include "hashmap.h"
  34 #include "list.h"
  35
  36 typedef struct Bridge Bridge;
  37 typedef struct Network Network;
  38 typedef struct Link Link;
  39 typedef struct Address Address;
  40 typedef struct Route Route;
  41 typedef struct Manager Manager;
  42
  43 typedef struct bridge_join_callback bridge_join_callback;
  44
  45 struct bridge_join_callback {
  46         sd_rtnl_message_handler_t callback;
  47         Link *link;
  48
  49         LIST_FIELDS(bridge_join_callback, callbacks);
  50 };
  51
  52 typedef enum BridgeState {
  53         BRIDGE_STATE_FAILED,
  54         BRIDGE_STATE_CREATING,
  55         BRIDGE_STATE_CREATED,
  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
  90         LIST_HEAD(Address, static_addresses);
  91         LIST_HEAD(Route, static_routes);
  92
  93         Hashmap *addresses_by_section;
  94         Hashmap *routes_by_section;
  95
  96         LIST_FIELDS(Network, networks);
  97 };
  98
  99 struct Address {
 100         Network *network;
 101         uint64_t section;
 102
 103         unsigned char family;
 104         unsigned char prefixlen;
 105         char *label;
 106
 107         struct in_addr netmask;
 108
 109         union {
 110                 struct in_addr in;
 111                 struct in6_addr in6;
 112         } in_addr;
 113
 114         LIST_FIELDS(Address, static_addresses);
 115 };
 116
 117 struct Route {
 118         Network *network;
 119         uint64_t section;
 120
 121         unsigned char family;
 122         unsigned char dst_family;
 123         unsigned char dst_prefixlen;
 124
 125         union {
 126                 struct in_addr in;
 127                 struct in6_addr in6;
 128         } in_addr;
 129
 130         union {
 131                 struct in_addr in;
 132                 struct in6_addr in6;
 133         } dst_addr;
 134
 135         LIST_FIELDS(Route, static_routes);
 136 };
 137
 138 typedef enum LinkState {
 139         LINK_STATE_JOINING_BRIDGE,
 140         LINK_STATE_SETTING_ADDRESSES,
 141         LINK_STATE_SETTING_ROUTES,
 142         LINK_STATE_CONFIGURED,
 143         LINK_STATE_FAILED,
 144         _LINK_STATE_MAX,
 145         _LINK_STATE_INVALID = -1
 146 } LinkState;
 147
 148 struct Link {
 149         Manager *manager;
 150
 151         uint64_t ifindex;
 152         char *ifname;
 153         struct ether_addr mac;
 154
 155         unsigned flags;
 156
 157         Network *network;
 158
 159         Route *dhcp_route;
 160         Address *dhcp_address;
 161
 162         LinkState state;
 163
 164         unsigned addr_messages;
 165         unsigned route_messages;
 166
 167         sd_dhcp_client *dhcp;
 168 };
 169
 170 struct Manager {
 171         sd_rtnl *rtnl;
 172         sd_event *event;
 173         struct udev *udev;
 174         struct udev_monitor *udev_monitor;
 175         sd_event_source *udev_event_source;
 176
 177         Hashmap *links;
 178         Hashmap *bridges;
 179         LIST_HEAD(Network, networks);
 180
 181         usec_t network_dirs_ts_usec;
 182 };
 183
 184 extern const char* const network_dirs[];
 185
 186 /* Manager */
 187
 188 int manager_new(Manager **ret);
 189 void manager_free(Manager *m);
 190
 191 int manager_load_config(Manager *m);
 192 bool manager_should_reload(Manager *m);
 193
 194 int manager_udev_enumerate_links(Manager *m);
 195 int manager_udev_listen(Manager *m);
 196
 197 int manager_rtnl_listen(Manager *m);
 198
 199 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 200 #define _cleanup_manager_free_ _cleanup_(manager_freep)
 201
 202 /* Bridge */
 203
 204 int bridge_load(Manager *manager);
 205
 206 void bridge_free(Bridge *bridge);
 207
 208 DEFINE_TRIVIAL_CLEANUP_FUNC(Bridge*, bridge_free);
 209 #define _cleanup_bridge_free_ _cleanup_(bridge_freep)
 210
 211 int bridge_get(Manager *manager, const char *name, Bridge **ret);
 212 int bridge_set_link(Manager *m, Link *link);
 213 int bridge_join(Bridge *bridge, Link *link, sd_rtnl_message_handler_t cb);
 214
 215 /* Network */
 216
 217 int network_load(Manager *manager);
 218
 219 void network_free(Network *network);
 220
 221 DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
 222 #define _cleanup_network_free_ _cleanup_(network_freep)
 223
 224 int network_get(Manager *manager, struct udev_device *device, Network **ret);
 225 int network_apply(Manager *manager, Network *network, Link *link);
 226
 227 int config_parse_bridge(const char *unit, const char *filename, unsigned line,
 228                         const char *section, unsigned section_line, const char *lvalue,
 229                         int ltype, const char *rvalue, void *data, void *userdata);
 230
 231 /* gperf */
 232
 233 const struct ConfigPerfItem* network_gperf_lookup(const char *key, unsigned length);
 234
 235 /* Route */
 236 int route_new_static(Network *network, unsigned section, Route **ret);
 237 int route_new_dynamic(Route **ret);
 238 void route_free(Route *route);
 239 int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 240
 241 DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
 242 #define _cleanup_route_free_ _cleanup_(route_freep)
 243
 244 int config_parse_gateway(const char *unit, const char *filename, unsigned line,
 245                          const char *section, unsigned section_line, const char *lvalue,
 246                          int ltype, const char *rvalue, void *data, void *userdata);
 247
 248 int config_parse_destination(const char *unit, const char *filename, unsigned line,
 249                              const char *section, unsigned section_line, const char *lvalue,
 250                              int ltype, const char *rvalue, void *data, void *userdata);
 251
 252 /* Address */
 253 int address_new_static(Network *network, unsigned section, Address **ret);
 254 int address_new_dynamic(Address **ret);
 255 void address_free(Address *address);
 256 int address_configure(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 257 int address_drop(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 258
 259 DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
 260 #define _cleanup_address_free_ _cleanup_(address_freep)
 261
 262 int config_parse_address(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 int config_parse_label(const char *unit, const char *filename, unsigned line,
 267                        const char *section, unsigned section_line, const char *lvalue,
 268                        int ltype, const char *rvalue, void *data, void *userdata);
 269
 270 /* Link */
 271
 272 int link_new(Manager *manager, struct udev_device *device, Link **ret);
 273 void link_free(Link *link);
 274 int link_add(Manager *manager, struct udev_device *device, Link **ret);
 275 int link_configure(Link *link);
 276
 277 int link_update(Link *link, sd_rtnl_message *message);
 278
 279 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_free);
 280 #define _cleanup_link_free_ _cleanup_(link_freep)
 281
 282 /* Macros which append INTERFACE= to the message */
 283
 284 #define log_full_link(level, link, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", link->ifname, "%s: " fmt, link->ifname, __VA_ARGS__)
 285 #define log_debug_link(link, ...)       log_full_link(LOG_DEBUG, link, __VA_ARGS__)
 286 #define log_info_link(link, ...)        log_full_link(LOG_INFO, link, __VA_ARGS__)
 287 #define log_notice_link(link, ...)      log_full_link(LOG_NOTICE, link, __VA_ARGS__)
 288 #define log_warning_link(link, ...)     log_full_link(LOG_WARNING, link, __VA_ARGS__)
 289 #define log_error_link(link, ...)       log_full_link(LOG_ERR, link, __VA_ARGS__)
 290
 291 #define log_link_full(level, link, message) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", link->ifname, "%s: " message, link->ifname)
 292 #define log_link_debug(link, ...)       log_link_full(LOG_DEBUG, link, __VA_ARGS__)
 293 #define log_link_info(link, ...)        log_link_full(LOG_INFO, link, __VA_ARGS__)
 294 #define log_link_notice(link, ...)      log_link_full(LOG_NOTICE, link, __VA_ARGS__)
 295 #define log_link_warning(link, ...)     log_link_full(LOG_WARNING, link, __VA_ARGS__)
 296 #define log_link_error(link, ...)       log_link_full(LOG_ERR, link, __VA_ARGS__)
 297
 298 #define log_struct_link(level, link, ...) log_struct(level, "INTERFACE=%s", link->ifname, __VA_ARGS__)
 299
 300 /* More macros which append INTERFACE= to the message */
 301
 302 #define log_full_bridge(level, bridge, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", bridge->name, "%s: " fmt, bridge->name, __VA_ARGS__)
 303 #define log_debug_bridge(bridge, ...)       log_full_bridge(LOG_DEBUG, bridge, __VA_ARGS__)
 304 #define log_info_bridge(bridge, ...)        log_full_bridge(LOG_INFO, bridge, __VA_ARGS__)
 305 #define log_notice_bridge(bridge, ...)      log_full_bridge(LOG_NOTICE, bridge, __VA_ARGS__)
 306 #define log_warning_bridge(bridge, ...)     log_full_bridge(LOG_WARNING, bridge, __VA_ARGS__)
 307 #define log_error_bridge(bridge, ...)       log_full_bridge(LOG_ERR, bridge, __VA_ARGS__)
 308
 309 #define log_bridge_full(level, bridge, message) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", bridge->name, "%s: " message, bridge->name)
 310 #define log_bridge_debug(bridge, ...)       log_bridge_full(LOG_DEBUG, bridge, __VA_ARGS__)
 311 #define log_bridge_info(bridge, ...)        log_bridge_full(LOG_INFO, bridge, __VA_ARGS__)
 312 #define log_bridge_notice(bridge, ...)      log_bridge_full(LOG_NOTICE, bridge, __VA_ARGS__)
 313 #define log_bridge_warning(bridge, ...)     log_bridge_full(LOG_WARNING, bridge, __VA_ARGS__)
 314 #define log_bridge_error(bridge, ...)       log_bridge_full(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