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_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         char **network_dirs;
 181         usec_t network_dirs_ts_usec;
 182 };
 183
 184 /* Manager */
 185
 186 int manager_new(Manager **ret);
 187 void manager_free(Manager *m);
 188
 189 int manager_load_config(Manager *m);
 190 bool manager_should_reload(Manager *m);
 191
 192 int manager_udev_enumerate_links(Manager *m);
 193 int manager_udev_listen(Manager *m);
 194
 195 int manager_rtnl_listen(Manager *m);
 196
 197 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 198 #define _cleanup_manager_free_ _cleanup_(manager_freep)
 199
 200 /* Bridge */
 201
 202 int bridge_load(Manager *manager);
 203
 204 void bridge_free(Bridge *bridge);
 205
 206 DEFINE_TRIVIAL_CLEANUP_FUNC(Bridge*, bridge_free);
 207 #define _cleanup_bridge_free_ _cleanup_(bridge_freep)
 208
 209 int bridge_get(Manager *manager, const char *name, Bridge **ret);
 210 int bridge_set_link(Manager *m, Link *link);
 211 int bridge_join(Bridge *bridge, Link *link, sd_rtnl_message_handler_t cb);
 212
 213 /* Network */
 214
 215 int network_load(Manager *manager);
 216
 217 void network_free(Network *network);
 218
 219 DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
 220 #define _cleanup_network_free_ _cleanup_(network_freep)
 221
 222 int network_get(Manager *manager, struct udev_device *device, Network **ret);
 223 int network_apply(Manager *manager, Network *network, Link *link);
 224
 225 int config_parse_bridge(const char *unit, const char *filename, unsigned line,
 226                         const char *section, unsigned section_line, const char *lvalue,
 227                         int ltype, const char *rvalue, void *data, void *userdata);
 228
 229 /* gperf */
 230
 231 const struct ConfigPerfItem* network_gperf_lookup(const char *key, unsigned length);
 232
 233 /* Route */
 234 int route_new_static(Network *network, unsigned section, Route **ret);
 235 int route_new_dynamic(Route **ret);
 236 void route_free(Route *route);
 237 int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 238
 239 DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
 240 #define _cleanup_route_free_ _cleanup_(route_freep)
 241
 242 int config_parse_gateway(const char *unit, const char *filename, unsigned line,
 243                          const char *section, unsigned section_line, const char *lvalue,
 244                          int ltype, const char *rvalue, void *data, void *userdata);
 245
 246 int config_parse_destination(const char *unit, const char *filename, unsigned line,
 247                              const char *section, unsigned section_line, const char *lvalue,
 248                              int ltype, const char *rvalue, void *data, void *userdata);
 249
 250 /* Address */
 251 int address_new_static(Network *network, unsigned section, Address **ret);
 252 int address_new_dynamic(Address **ret);
 253 void address_free(Address *address);
 254 int address_configure(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 255 int address_drop(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 256
 257 DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
 258 #define _cleanup_address_free_ _cleanup_(address_freep)
 259
 260 int config_parse_address(const char *unit, const char *filename, unsigned line,
 261                          const char *section, unsigned section_line, const char *lvalue,
 262                          int ltype, const char *rvalue, void *data, void *userdata);
 263
 264 int config_parse_label(const char *unit, const char *filename, unsigned line,
 265                        const char *section, unsigned section_line, const char *lvalue,
 266                        int ltype, const char *rvalue, void *data, void *userdata);
 267
 268 /* Link */
 269
 270 int link_new(Manager *manager, struct udev_device *device, Link **ret);
 271 void link_free(Link *link);
 272 int link_add(Manager *manager, struct udev_device *device);
 273 int link_configure(Link *link);
 274
 275 int link_update(Link *link, sd_rtnl_message *message);
 276
 277 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_free);
 278 #define _cleanup_link_free_ _cleanup_(link_freep)