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_READY,
  56         _BRIDGE_STATE_MAX,
  57         _BRIDGE_STATE_INVALID = -1,
  58 } BridgeState;
  59
  60 struct Bridge {
  61         Manager *manager;
  62
  63         char *filename;
  64
  65         char *description;
  66         char *name;
  67
  68         Link *link;
  69         BridgeState state;
  70
  71         LIST_HEAD(bridge_join_callback, callbacks);
  72 };
  73
  74 struct Network {
  75         Manager *manager;
  76
  77         char *filename;
  78
  79         struct ether_addr *match_mac;
  80         char *match_path;
  81         char *match_driver;
  82         char *match_type;
  83         char *match_name;
  84
  85         char *description;
  86         Bridge *bridge;
  87         bool dhcp;
  88
  89         LIST_HEAD(Address, static_addresses);
  90         LIST_HEAD(Route, static_routes);
  91
  92         Hashmap *addresses_by_section;
  93         Hashmap *routes_by_section;
  94
  95         LIST_FIELDS(Network, networks);
  96 };
  97
  98 struct Address {
  99         Network *network;
 100         uint64_t section;
 101
 102         unsigned char family;
 103         unsigned char prefixlen;
 104         char *label;
 105
 106         struct in_addr netmask;
 107
 108         union {
 109                 struct in_addr in;
 110                 struct in6_addr in6;
 111         } in_addr;
 112
 113         LIST_FIELDS(Address, static_addresses);
 114 };
 115
 116 struct Route {
 117         Network *network;
 118         uint64_t section;
 119
 120         unsigned char family;
 121         unsigned char dst_family;
 122         unsigned char dst_prefixlen;
 123
 124         union {
 125                 struct in_addr in;
 126                 struct in6_addr in6;
 127         } in_addr;
 128
 129         union {
 130                 struct in_addr in;
 131                 struct in6_addr in6;
 132         } dst_addr;
 133
 134         LIST_FIELDS(Route, static_routes);
 135 };
 136
 137 typedef enum LinkState {
 138         LINK_STATE_JOINING_BRIDGE,
 139         LINK_STATE_SETTING_ADDRESSES,
 140         LINK_STATE_SETTING_ROUTES,
 141         LINK_STATE_CONFIGURED,
 142         LINK_STATE_FAILED,
 143         _LINK_STATE_MAX,
 144         _LINK_STATE_INVALID = -1
 145 } LinkState;
 146
 147 struct Link {
 148         Manager *manager;
 149
 150         uint64_t ifindex;
 151         char *ifname;
 152         struct ether_addr mac;
 153
 154         unsigned flags;
 155
 156         Network *network;
 157
 158         Route *dhcp_route;
 159         Address *dhcp_address;
 160
 161         LinkState state;
 162
 163         unsigned addr_messages;
 164         unsigned route_messages;
 165
 166         sd_dhcp_client *dhcp;
 167 };
 168
 169 struct Manager {
 170         sd_rtnl *rtnl;
 171         sd_event *event;
 172         struct udev *udev;
 173         struct udev_monitor *udev_monitor;
 174         sd_event_source *udev_event_source;
 175
 176         Hashmap *links;
 177         Hashmap *bridges;
 178         LIST_HEAD(Network, networks);
 179
 180         usec_t network_dirs_ts_usec;
 181 };
 182
 183 extern const char* const network_dirs[];
 184
 185 /* Manager */
 186
 187 int manager_new(Manager **ret);
 188 void manager_free(Manager *m);
 189
 190 int manager_load_config(Manager *m);
 191 bool manager_should_reload(Manager *m);
 192
 193 int manager_udev_enumerate_links(Manager *m);
 194 int manager_udev_listen(Manager *m);
 195
 196 int manager_rtnl_listen(Manager *m);
 197
 198 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 199 #define _cleanup_manager_free_ _cleanup_(manager_freep)
 200
 201 /* Bridge */
 202
 203 int bridge_load(Manager *manager);
 204
 205 void bridge_free(Bridge *bridge);
 206
 207 DEFINE_TRIVIAL_CLEANUP_FUNC(Bridge*, bridge_free);
 208 #define _cleanup_bridge_free_ _cleanup_(bridge_freep)
 209
 210 int bridge_get(Manager *manager, const char *name, Bridge **ret);
 211 int bridge_set_link(Manager *m, Link *link);
 212 int bridge_join(Bridge *bridge, Link *link, sd_rtnl_message_handler_t cb);
 213
 214 /* Network */
 215
 216 int network_load(Manager *manager);
 217
 218 void network_free(Network *network);
 219
 220 DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
 221 #define _cleanup_network_free_ _cleanup_(network_freep)
 222
 223 int network_get(Manager *manager, struct udev_device *device, Network **ret);
 224 int network_apply(Manager *manager, Network *network, Link *link);
 225
 226 int config_parse_bridge(const char *unit, const char *filename, unsigned line,
 227                         const char *section, unsigned section_line, const char *lvalue,
 228                         int ltype, const char *rvalue, void *data, void *userdata);
 229
 230 /* gperf */
 231
 232 const struct ConfigPerfItem* network_gperf_lookup(const char *key, unsigned length);
 233
 234 /* Route */
 235 int route_new_static(Network *network, unsigned section, Route **ret);
 236 int route_new_dynamic(Route **ret);
 237 void route_free(Route *route);
 238 int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 239
 240 DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
 241 #define _cleanup_route_free_ _cleanup_(route_freep)
 242
 243 int config_parse_gateway(const char *unit, const char *filename, unsigned line,
 244                          const char *section, unsigned section_line, const char *lvalue,
 245                          int ltype, const char *rvalue, void *data, void *userdata);
 246
 247 int config_parse_destination(const char *unit, const char *filename, unsigned line,
 248                              const char *section, unsigned section_line, const char *lvalue,
 249                              int ltype, const char *rvalue, void *data, void *userdata);
 250
 251 /* Address */
 252 int address_new_static(Network *network, unsigned section, Address **ret);
 253 int address_new_dynamic(Address **ret);
 254 void address_free(Address *address);
 255 int address_configure(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 256 int address_drop(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 257
 258 DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
 259 #define _cleanup_address_free_ _cleanup_(address_freep)
 260
 261 int config_parse_address(const char *unit, const char *filename, unsigned line,
 262                          const char *section, unsigned section_line, const char *lvalue,
 263                          int ltype, const char *rvalue, void *data, void *userdata);
 264
 265 int config_parse_label(const char *unit, const char *filename, unsigned line,
 266                        const char *section, unsigned section_line, const char *lvalue,
 267                        int ltype, const char *rvalue, void *data, void *userdata);
 268
 269 /* Link */
 270
 271 int link_new(Manager *manager, struct udev_device *device, Link **ret);
 272 void link_free(Link *link);
 273 int link_add(Manager *manager, struct udev_device *device, Link **ret);
 274 int link_configure(Link *link);
 275
 276 int link_update(Link *link, sd_rtnl_message *message);
 277
 278 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_free);
 279 #define _cleanup_link_free_ _cleanup_(link_freep)
 280
 281 /* Macros which append INTERFACE= to the message */
 282
 283 #define log_full_link(level, link, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", link->ifname, "%s: " fmt, link->ifname, ##__VA_ARGS__)
 284 #define log_debug_link(link, ...)       log_full_link(LOG_DEBUG, link, ##__VA_ARGS__)
 285 #define log_info_link(link, ...)        log_full_link(LOG_INFO, link, ##__VA_ARGS__)
 286 #define log_notice_link(link, ...)      log_full_link(LOG_NOTICE, link, ##__VA_ARGS__)
 287 #define log_warning_link(link, ...)     log_full_link(LOG_WARNING, link, ##__VA_ARGS__)
 288 #define log_error_link(link, ...)       log_full_link(LOG_ERR, link, ##__VA_ARGS__)
 289
 290 #define log_struct_link(level, link, ...) log_struct(level, "INTERFACE=%s", link->ifname, __VA_ARGS__)
 291
 292 /* More macros which append INTERFACE= to the message */
 293
 294 #define log_full_bridge(level, bridge, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", bridge->name, "%s: " fmt, bridge->name, ##__VA_ARGS__)
 295 #define log_debug_bridge(bridge, ...)       log_full_bridge(LOG_DEBUG, bridge, ##__VA_ARGS__)
 296 #define log_info_bridge(bridge, ...)        log_full_bridge(LOG_INFO, bridge, ##__VA_ARGS__)
 297 #define log_notice_bridge(bridge, ...)      log_full_bridge(LOG_NOTICE, bridge, ##__VA_ARGS__)
 298 #define log_warning_bridge(bridge, ...)     log_full_bridge(LOG_WARNING, bridge,## __VA_ARGS__)
 299 #define log_error_bridge(bridge, ...)       log_full_bridge(LOG_ERR, bridge, ##__VA_ARGS__)
 300
 301 #define log_struct_bridge(level, bridge, ...) log_struct(level, "INTERFACE=%s", bridge->name, __VA_ARGS__)
 302
 303 #define BRIDGE(bridge) "INTERFACE=%s", bridge->name
 304 #define ADDRESS_FMT_VAL(address)            \
 305         (address).s_addr & 0xFF,            \
 306         ((address).s_addr >> 8) & 0xFF,     \
 307         ((address).s_addr >> 16) & 0xFF,    \
 308         (address).s_addr >> 24