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
  26 #include "sd-event.h"
  27 #include "sd-rtnl.h"
  28 #include "sd-bus.h"
  29 #include "sd-dhcp-client.h"
  30 #include "sd-dhcp-server.h"
  31 #include "sd-ipv4ll.h"
  32 #include "sd-icmp6-nd.h"
  33 #include "sd-dhcp6-client.h"
  34 #include "udev.h"
  35
  36 #include "rtnl-util.h"
  37 #include "hashmap.h"
  38 #include "list.h"
  39 #include "set.h"
  40 #include "condition.h"
  41 #include "in-addr-util.h"
  42
  43 #define CACHE_INFO_INFINITY_LIFE_TIME 0xFFFFFFFFU
  44 #define DHCP_ROUTE_METRIC 1024
  45 #define IPV4LL_ROUTE_METRIC 2048
  46
  47 typedef struct NetDev NetDev;
  48 typedef struct Network Network;
  49 typedef struct Link Link;
  50 typedef struct Address Address;
  51 typedef struct Route Route;
  52 typedef struct Manager Manager;
  53 typedef struct AddressPool AddressPool;
  54
  55 typedef enum DHCPSupport {
  56         DHCP_SUPPORT_NONE,
  57         DHCP_SUPPORT_BOTH,
  58         DHCP_SUPPORT_V4,
  59         DHCP_SUPPORT_V6,
  60         _DHCP_SUPPORT_MAX,
  61         _DHCP_SUPPORT_INVALID = -1,
  62 } DHCPSupport;
  63
  64 typedef enum LLMNRSupport {
  65         LLMNR_SUPPORT_NO,
  66         LLMNR_SUPPORT_YES,
  67         LLMNR_SUPPORT_RESOLVE,
  68         _LLMNR_SUPPORT_MAX,
  69         _LLMNR_SUPPORT_INVALID = -1,
  70 } LLMNRSupport;
  71
  72 struct Network {
  73         Manager *manager;
  74
  75         char *filename;
  76
  77         struct ether_addr *match_mac;
  78         char *match_path;
  79         char *match_driver;
  80         char *match_type;
  81         char *match_name;
  82         char *dhcp_vendor_class_identifier;
  83
  84         Condition *match_host;
  85         Condition *match_virt;
  86         Condition *match_kernel;
  87         Condition *match_arch;
  88
  89         char *description;
  90         NetDev *bridge;
  91         NetDev *bond;
  92         Hashmap *stacked_netdevs;
  93         DHCPSupport dhcp;
  94         bool dhcp_dns;
  95         bool dhcp_ntp;
  96         bool dhcp_mtu;
  97         bool dhcp_hostname;
  98         bool dhcp_domains;
  99         bool dhcp_sendhost;
 100         bool dhcp_broadcast;
 101         bool dhcp_critical;
 102         bool dhcp_routes;
 103         unsigned dhcp_route_metric;
 104         bool ipv4ll;
 105         bool ipv4ll_route;
 106
 107         bool dhcp_server;
 108
 109         unsigned cost;
 110
 111         LIST_HEAD(Address, static_addresses);
 112         LIST_HEAD(Route, static_routes);
 113
 114         Hashmap *addresses_by_section;
 115         Hashmap *routes_by_section;
 116
 117         bool wildcard_domain;
 118         char **domains, **dns, **ntp;
 119
 120         LLMNRSupport llmnr;
 121
 122         LIST_FIELDS(Network, networks);
 123 };
 124
 125 struct Address {
 126         Network *network;
 127         unsigned section;
 128
 129         int family;
 130         unsigned char prefixlen;
 131         unsigned char scope;
 132         unsigned char flags;
 133         char *label;
 134
 135         struct in_addr broadcast;
 136         struct ifa_cacheinfo cinfo;
 137
 138         union in_addr_union in_addr;
 139         union in_addr_union in_addr_peer;
 140
 141         LIST_FIELDS(Address, addresses);
 142 };
 143
 144 struct Route {
 145         Network *network;
 146         unsigned section;
 147
 148         int family;
 149         unsigned char dst_prefixlen;
 150         unsigned char scope;
 151         uint32_t metrics;
 152         unsigned char protocol;  /* RTPROT_* */
 153
 154         union in_addr_union in_addr;
 155         union in_addr_union dst_addr;
 156         union in_addr_union prefsrc_addr;
 157
 158         LIST_FIELDS(Route, routes);
 159 };
 160
 161 struct AddressPool {
 162         Manager *manager;
 163
 164         int family;
 165         unsigned prefixlen;
 166
 167         union in_addr_union in_addr;
 168
 169         LIST_FIELDS(AddressPool, address_pools);
 170 };
 171
 172 struct Manager {
 173         sd_rtnl *rtnl;
 174         sd_event *event;
 175         sd_bus *bus;
 176         struct udev *udev;
 177         struct udev_monitor *udev_monitor;
 178         sd_event_source *udev_event_source;
 179
 180         char *state_file;
 181
 182         Hashmap *links;
 183         Hashmap *netdevs;
 184         LIST_HEAD(Network, networks);
 185         LIST_HEAD(AddressPool, address_pools);
 186
 187         usec_t network_dirs_ts_usec;
 188 };
 189
 190 extern const char* const network_dirs[];
 191
 192 /* Manager */
 193
 194 int manager_new(Manager **ret);
 195 void manager_free(Manager *m);
 196
 197 int manager_load_config(Manager *m);
 198 bool manager_should_reload(Manager *m);
 199
 200 int manager_rtnl_enumerate_links(Manager *m);
 201
 202 int manager_rtnl_listen(Manager *m);
 203 int manager_udev_listen(Manager *m);
 204 int manager_bus_listen(Manager *m);
 205
 206 int manager_save(Manager *m);
 207
 208 int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found);
 209
 210 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 211 #define _cleanup_manager_free_ _cleanup_(manager_freep)
 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,
 223                 const char *ifname, const struct ether_addr *mac,
 224                 Network **ret);
 225 int network_apply(Manager *manager, Network *network, Link *link);
 226
 227 int config_parse_netdev(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 int config_parse_domains(const char *unit,
 232                          const char *filename,
 233                          unsigned line,
 234                          const char *section,
 235                          unsigned section_line,
 236                          const char *lvalue,
 237                          int ltype,
 238                          const char *rvalue,
 239                          void *data,
 240                          void *userdata);
 241
 242 int config_parse_tunnel(const char *unit,
 243                         const char *filename,
 244                         unsigned line,
 245                         const char *section,
 246                         unsigned section_line,
 247                         const char *lvalue,
 248                         int ltype,
 249                         const char *rvalue,
 250                         void *data,
 251                         void *userdata);
 252
 253 int config_parse_tunnel_address(const char *unit,
 254                                 const char *filename,
 255                                 unsigned line,
 256                                 const char *section,
 257                                 unsigned section_line,
 258                                 const char *lvalue,
 259                                 int ltype,
 260                                 const char *rvalue,
 261                                 void *data,
 262                                 void *userdata);
 263
 264 int config_parse_vxlan_group_address(const char *unit,
 265                                      const char *filename,
 266                                      unsigned line,
 267                                      const char *section,
 268                                      unsigned section_line,
 269                                      const char *lvalue,
 270                                      int ltype,
 271                                      const char *rvalue,
 272                                      void *data,
 273                                      void *userdata);
 274
 275 /* gperf */
 276 const struct ConfigPerfItem* network_network_gperf_lookup(const char *key, unsigned length);
 277
 278 /* Route */
 279 int route_new_static(Network *network, unsigned section, Route **ret);
 280 int route_new_dynamic(Route **ret, unsigned char rtm_protocol);
 281 void route_free(Route *route);
 282 int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 283 int route_drop(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 284
 285
 286 DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
 287 #define _cleanup_route_free_ _cleanup_(route_freep)
 288
 289 int config_parse_gateway(const char *unit, const char *filename, unsigned line,
 290                          const char *section, unsigned section_line, const char *lvalue,
 291                          int ltype, const char *rvalue, void *data, void *userdata);
 292
 293 int config_parse_destination(const char *unit, const char *filename, unsigned line,
 294                              const char *section, unsigned section_line, const char *lvalue,
 295                              int ltype, const char *rvalue, void *data, void *userdata);
 296
 297 int config_parse_route_priority(const char *unit, const char *filename, unsigned line,
 298                                 const char *section, unsigned section_line, const char *lvalue,
 299                                 int ltype, const char *rvalue, void *data, void *userdata);
 300 /* Address */
 301 int address_new_static(Network *network, unsigned section, Address **ret);
 302 int address_new_dynamic(Address **ret);
 303 void address_free(Address *address);
 304 int address_configure(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 305 int address_update(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 306 int address_drop(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 307 bool address_equal(Address *a1, Address *a2);
 308
 309 DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
 310 #define _cleanup_address_free_ _cleanup_(address_freep)
 311
 312 int config_parse_address(const char *unit, const char *filename, unsigned line,
 313                          const char *section, unsigned section_line, const char *lvalue,
 314                          int ltype, const char *rvalue, void *data, void *userdata);
 315
 316 int config_parse_broadcast(const char *unit, const char *filename, unsigned line,
 317                            const char *section, unsigned section_line, const char *lvalue,
 318                            int ltype, const char *rvalue, void *data, void *userdata);
 319
 320 int config_parse_label(const char *unit, const char *filename, unsigned line,
 321                        const char *section, unsigned section_line, const char *lvalue,
 322                        int ltype, const char *rvalue, void *data, void *userdata);
 323
 324 /* DHCP support */
 325
 326 const char* dhcp_support_to_string(DHCPSupport i) _const_;
 327 DHCPSupport dhcp_support_from_string(const char *s) _pure_;
 328
 329 int config_parse_dhcp(const char *unit, const char *filename, unsigned line,
 330                       const char *section, unsigned section_line, const char *lvalue,
 331                       int ltype, const char *rvalue, void *data, void *userdata);
 332
 333 /* LLMNR support */
 334
 335 const char* llmnr_support_to_string(LLMNRSupport i) _const_;
 336 LLMNRSupport llmnr_support_from_string(const char *s) _pure_;
 337
 338 int config_parse_llmnr(const char *unit, const char *filename, unsigned line,
 339                       const char *section, unsigned section_line, const char *lvalue,
 340                       int ltype, const char *rvalue, void *data, void *userdata);
 341
 342 /* Address Pool */
 343
 344 int address_pool_new(Manager *m, AddressPool **ret, int family, const union in_addr_union *u, unsigned prefixlen);
 345 int address_pool_new_from_string(Manager *m, AddressPool **ret, int family, const char *p, unsigned prefixlen);
 346 void address_pool_free(AddressPool *p);
 347
 348 int address_pool_acquire(AddressPool *p, unsigned prefixlen, union in_addr_union *found);