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-util.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         bool ipv4ll;
 104         bool ipv4ll_route;
 105
 106         bool dhcp_server;
 107
 108         LIST_HEAD(Address, static_addresses);
 109         LIST_HEAD(Route, static_routes);
 110
 111         Hashmap *addresses_by_section;
 112         Hashmap *routes_by_section;
 113
 114         bool wildcard_domain;
 115         char **domains, **dns, **ntp;
 116
 117         LLMNRSupport llmnr;
 118
 119         LIST_FIELDS(Network, networks);
 120 };
 121
 122 struct Address {
 123         Network *network;
 124         unsigned section;
 125
 126         int family;
 127         unsigned char prefixlen;
 128         unsigned char scope;
 129         unsigned char flags;
 130         char *label;
 131
 132         struct in_addr broadcast;
 133         struct ifa_cacheinfo cinfo;
 134
 135         union in_addr_union in_addr;
 136         union in_addr_union in_addr_peer;
 137
 138         LIST_FIELDS(Address, addresses);
 139 };
 140
 141 struct Route {
 142         Network *network;
 143         unsigned section;
 144
 145         int family;
 146         unsigned char dst_prefixlen;
 147         unsigned char scope;
 148         uint32_t metrics;
 149         unsigned char protocol;  /* RTPROT_* */
 150
 151         union in_addr_union in_addr;
 152         union in_addr_union dst_addr;
 153         union in_addr_union prefsrc_addr;
 154
 155         LIST_FIELDS(Route, routes);
 156 };
 157
 158 struct AddressPool {
 159         Manager *manager;
 160
 161         int family;
 162         unsigned prefixlen;
 163
 164         union in_addr_union in_addr;
 165
 166         LIST_FIELDS(AddressPool, address_pools);
 167 };
 168
 169 struct Manager {
 170         sd_rtnl *rtnl;
 171         sd_event *event;
 172         sd_bus *bus;
 173         struct udev *udev;
 174         struct udev_monitor *udev_monitor;
 175         sd_event_source *udev_event_source;
 176         sd_event_source *sigterm_event_source;
 177         sd_event_source *sigint_event_source;
 178
 179         char *state_file;
 180
 181         Hashmap *links;
 182         Hashmap *netdevs;
 183         LIST_HEAD(Network, networks);
 184         LIST_HEAD(AddressPool, address_pools);
 185
 186         usec_t network_dirs_ts_usec;
 187 };
 188
 189 extern const char* const network_dirs[];
 190
 191 /* Manager */
 192
 193 int manager_new(Manager **ret);
 194 void manager_free(Manager *m);
 195
 196 int manager_load_config(Manager *m);
 197 bool manager_should_reload(Manager *m);
 198
 199 int manager_rtnl_enumerate_links(Manager *m);
 200
 201 int manager_rtnl_listen(Manager *m);
 202 int manager_udev_listen(Manager *m);
 203 int manager_bus_listen(Manager *m);
 204
 205 int manager_save(Manager *m);
 206
 207 int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found);
 208
 209 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 210 #define _cleanup_manager_free_ _cleanup_(manager_freep)
 211
 212 /* Network */
 213
 214 int network_load(Manager *manager);
 215
 216 void network_free(Network *network);
 217
 218 DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
 219 #define _cleanup_network_free_ _cleanup_(network_freep)
 220
 221 int network_get(Manager *manager, struct udev_device *device,
 222                 const char *ifname, const struct ether_addr *mac,
 223                 Network **ret);
 224 int network_apply(Manager *manager, Network *network, Link *link);
 225
 226 int config_parse_netdev(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 int config_parse_domains(const char *unit,
 231                          const char *filename,
 232                          unsigned line,
 233                          const char *section,
 234                          unsigned section_line,
 235                          const char *lvalue,
 236                          int ltype,
 237                          const char *rvalue,
 238                          void *data,
 239                          void *userdata);
 240
 241 int config_parse_tunnel(const char *unit,
 242                         const char *filename,
 243                         unsigned line,
 244                         const char *section,
 245                         unsigned section_line,
 246                         const char *lvalue,
 247                         int ltype,
 248                         const char *rvalue,
 249                         void *data,
 250                         void *userdata);
 251
 252 int config_parse_tunnel_address(const char *unit,
 253                                 const char *filename,
 254                                 unsigned line,
 255                                 const char *section,
 256                                 unsigned section_line,
 257                                 const char *lvalue,
 258                                 int ltype,
 259                                 const char *rvalue,
 260                                 void *data,
 261                                 void *userdata);
 262
 263 /* gperf */
 264 const struct ConfigPerfItem* network_network_gperf_lookup(const char *key, unsigned length);
 265
 266 /* Route */
 267 int route_new_static(Network *network, unsigned section, Route **ret);
 268 int route_new_dynamic(Route **ret, unsigned char rtm_protocol);
 269 void route_free(Route *route);
 270 int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 271 int route_drop(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 272
 273
 274 DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
 275 #define _cleanup_route_free_ _cleanup_(route_freep)
 276
 277 int config_parse_gateway(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_destination(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 int config_parse_route_priority(const char *unit, const char *filename, unsigned line,
 286                                 const char *section, unsigned section_line, const char *lvalue,
 287                                 int ltype, const char *rvalue, void *data, void *userdata);
 288 /* Address */
 289 int address_new_static(Network *network, unsigned section, Address **ret);
 290 int address_new_dynamic(Address **ret);
 291 void address_free(Address *address);
 292 int address_configure(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 293 int address_update(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 294 int address_drop(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 295 bool address_equal(Address *a1, Address *a2);
 296
 297 DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
 298 #define _cleanup_address_free_ _cleanup_(address_freep)
 299
 300 int config_parse_address(const char *unit, const char *filename, unsigned line,
 301                          const char *section, unsigned section_line, const char *lvalue,
 302                          int ltype, const char *rvalue, void *data, void *userdata);
 303
 304 int config_parse_broadcast(const char *unit, const char *filename, unsigned line,
 305                            const char *section, unsigned section_line, const char *lvalue,
 306                            int ltype, const char *rvalue, void *data, void *userdata);
 307
 308 int config_parse_label(const char *unit, const char *filename, unsigned line,
 309                        const char *section, unsigned section_line, const char *lvalue,
 310                        int ltype, const char *rvalue, void *data, void *userdata);
 311
 312 /* DHCP support */
 313
 314 const char* dhcp_support_to_string(DHCPSupport i) _const_;
 315 DHCPSupport dhcp_support_from_string(const char *s) _pure_;
 316
 317 int config_parse_dhcp(const char *unit, const char *filename, unsigned line,
 318                       const char *section, unsigned section_line, const char *lvalue,
 319                       int ltype, const char *rvalue, void *data, void *userdata);
 320
 321 /* LLMNR support */
 322
 323 const char* llmnr_support_to_string(LLMNRSupport i) _const_;
 324 LLMNRSupport llmnr_support_from_string(const char *s) _pure_;
 325
 326 int config_parse_llmnr(const char *unit, const char *filename, unsigned line,
 327                       const char *section, unsigned section_line, const char *lvalue,
 328                       int ltype, const char *rvalue, void *data, void *userdata);
 329
 330 /* Address Pool */
 331
 332 int address_pool_new(Manager *m, AddressPool **ret, int family, const union in_addr_union *u, unsigned prefixlen);
 333 int address_pool_new_from_string(Manager *m, AddressPool **ret, int family, const char *p, unsigned prefixlen);
 334 void address_pool_free(AddressPool *p);
 335
 336 int address_pool_acquire(AddressPool *p, unsigned prefixlen, union in_addr_union *found);
 337
 338 /* Macros which append INTERFACE= to the message */
 339
 340 #define log_full_link(level, link, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", link->ifname, "%-*s: " fmt, IFNAMSIZ, link->ifname, ##__VA_ARGS__)
 341 #define log_debug_link(link, ...)       log_full_link(LOG_DEBUG, link, ##__VA_ARGS__)
 342 #define log_info_link(link, ...)        log_full_link(LOG_INFO, link, ##__VA_ARGS__)
 343 #define log_notice_link(link, ...)      log_full_link(LOG_NOTICE, link, ##__VA_ARGS__)
 344 #define log_warning_link(link, ...)     log_full_link(LOG_WARNING, link, ##__VA_ARGS__)
 345 #define log_error_link(link, ...)       log_full_link(LOG_ERR, link, ##__VA_ARGS__)
 346
 347 #define log_struct_link(level, link, ...) log_struct(level, "INTERFACE=%s", link->ifname, __VA_ARGS__)
 348
 349 #define ADDRESS_FMT_VAL(address)            \
 350         (address).s_addr & 0xFF,            \
 351         ((address).s_addr >> 8) & 0xFF,     \
 352         ((address).s_addr >> 16) & 0xFF,    \
 353         (address).s_addr >> 24