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         LIST_HEAD(Address, static_addresses);
 110         LIST_HEAD(Route, static_routes);
 111
 112         Hashmap *addresses_by_section;
 113         Hashmap *routes_by_section;
 114
 115         bool wildcard_domain;
 116         char **domains, **dns, **ntp;
 117
 118         LLMNRSupport llmnr;
 119
 120         LIST_FIELDS(Network, networks);
 121 };
 122
 123 struct Address {
 124         Network *network;
 125         unsigned section;
 126
 127         int family;
 128         unsigned char prefixlen;
 129         unsigned char scope;
 130         unsigned char flags;
 131         char *label;
 132
 133         struct in_addr broadcast;
 134         struct ifa_cacheinfo cinfo;
 135
 136         union in_addr_union in_addr;
 137         union in_addr_union in_addr_peer;
 138
 139         LIST_FIELDS(Address, addresses);
 140 };
 141
 142 struct Route {
 143         Network *network;
 144         unsigned section;
 145
 146         int family;
 147         unsigned char dst_prefixlen;
 148         unsigned char scope;
 149         uint32_t metrics;
 150         unsigned char protocol;  /* RTPROT_* */
 151
 152         union in_addr_union in_addr;
 153         union in_addr_union dst_addr;
 154         union in_addr_union prefsrc_addr;
 155
 156         LIST_FIELDS(Route, routes);
 157 };
 158
 159 struct AddressPool {
 160         Manager *manager;
 161
 162         int family;
 163         unsigned prefixlen;
 164
 165         union in_addr_union in_addr;
 166
 167         LIST_FIELDS(AddressPool, address_pools);
 168 };
 169
 170 struct Manager {
 171         sd_rtnl *rtnl;
 172         sd_event *event;
 173         sd_bus *bus;
 174         struct udev *udev;
 175         struct udev_monitor *udev_monitor;
 176         sd_event_source *udev_event_source;
 177
 178         char *state_file;
 179
 180         Hashmap *links;
 181         Hashmap *netdevs;
 182         LIST_HEAD(Network, networks);
 183         LIST_HEAD(AddressPool, address_pools);
 184
 185         usec_t network_dirs_ts_usec;
 186 };
 187
 188 extern const char* const network_dirs[];
 189
 190 /* Manager */
 191
 192 int manager_new(Manager **ret);
 193 void manager_free(Manager *m);
 194
 195 int manager_load_config(Manager *m);
 196 bool manager_should_reload(Manager *m);
 197
 198 int manager_rtnl_enumerate_links(Manager *m);
 199
 200 int manager_rtnl_listen(Manager *m);
 201 int manager_udev_listen(Manager *m);
 202 int manager_bus_listen(Manager *m);
 203
 204 int manager_save(Manager *m);
 205
 206 int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found);
 207
 208 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 209 #define _cleanup_manager_free_ _cleanup_(manager_freep)
 210
 211 /* Network */
 212
 213 int network_load(Manager *manager);
 214
 215 void network_free(Network *network);
 216
 217 DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
 218 #define _cleanup_network_free_ _cleanup_(network_freep)
 219
 220 int network_get(Manager *manager, struct udev_device *device,
 221                 const char *ifname, const struct ether_addr *mac,
 222                 Network **ret);
 223 int network_apply(Manager *manager, Network *network, Link *link);
 224
 225 int config_parse_netdev(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 int config_parse_domains(const char *unit,
 230                          const char *filename,
 231                          unsigned line,
 232                          const char *section,
 233                          unsigned section_line,
 234                          const char *lvalue,
 235                          int ltype,
 236                          const char *rvalue,
 237                          void *data,
 238                          void *userdata);
 239
 240 int config_parse_tunnel(const char *unit,
 241                         const char *filename,
 242                         unsigned line,
 243                         const char *section,
 244                         unsigned section_line,
 245                         const char *lvalue,
 246                         int ltype,
 247                         const char *rvalue,
 248                         void *data,
 249                         void *userdata);
 250
 251 int config_parse_tunnel_address(const char *unit,
 252                                 const char *filename,
 253                                 unsigned line,
 254                                 const char *section,
 255                                 unsigned section_line,
 256                                 const char *lvalue,
 257                                 int ltype,
 258                                 const char *rvalue,
 259                                 void *data,
 260                                 void *userdata);
 261
 262 /* gperf */
 263 const struct ConfigPerfItem* network_network_gperf_lookup(const char *key, unsigned length);
 264
 265 /* Route */
 266 int route_new_static(Network *network, unsigned section, Route **ret);
 267 int route_new_dynamic(Route **ret, unsigned char rtm_protocol);
 268 void route_free(Route *route);
 269 int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 270 int route_drop(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 271
 272
 273 DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
 274 #define _cleanup_route_free_ _cleanup_(route_freep)
 275
 276 int config_parse_gateway(const char *unit, const char *filename, unsigned line,
 277                          const char *section, unsigned section_line, const char *lvalue,
 278                          int ltype, const char *rvalue, void *data, void *userdata);
 279
 280 int config_parse_destination(const char *unit, const char *filename, unsigned line,
 281                              const char *section, unsigned section_line, const char *lvalue,
 282                              int ltype, const char *rvalue, void *data, void *userdata);
 283
 284 int config_parse_route_priority(const char *unit, const char *filename, unsigned line,
 285                                 const char *section, unsigned section_line, const char *lvalue,
 286                                 int ltype, const char *rvalue, void *data, void *userdata);
 287 /* Address */
 288 int address_new_static(Network *network, unsigned section, Address **ret);
 289 int address_new_dynamic(Address **ret);
 290 void address_free(Address *address);
 291 int address_configure(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 292 int address_update(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 293 int address_drop(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 294 bool address_equal(Address *a1, Address *a2);
 295
 296 DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
 297 #define _cleanup_address_free_ _cleanup_(address_freep)
 298
 299 int config_parse_address(const char *unit, const char *filename, unsigned line,
 300                          const char *section, unsigned section_line, const char *lvalue,
 301                          int ltype, const char *rvalue, void *data, void *userdata);
 302
 303 int config_parse_broadcast(const char *unit, const char *filename, unsigned line,
 304                            const char *section, unsigned section_line, const char *lvalue,
 305                            int ltype, const char *rvalue, void *data, void *userdata);
 306
 307 int config_parse_label(const char *unit, const char *filename, unsigned line,
 308                        const char *section, unsigned section_line, const char *lvalue,
 309                        int ltype, const char *rvalue, void *data, void *userdata);
 310
 311 /* DHCP support */
 312
 313 const char* dhcp_support_to_string(DHCPSupport i) _const_;
 314 DHCPSupport dhcp_support_from_string(const char *s) _pure_;
 315
 316 int config_parse_dhcp(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 /* LLMNR support */
 321
 322 const char* llmnr_support_to_string(LLMNRSupport i) _const_;
 323 LLMNRSupport llmnr_support_from_string(const char *s) _pure_;
 324
 325 int config_parse_llmnr(const char *unit, const char *filename, unsigned line,
 326                       const char *section, unsigned section_line, const char *lvalue,
 327                       int ltype, const char *rvalue, void *data, void *userdata);
 328
 329 /* Address Pool */
 330
 331 int address_pool_new(Manager *m, AddressPool **ret, int family, const union in_addr_union *u, unsigned prefixlen);
 332 int address_pool_new_from_string(Manager *m, AddressPool **ret, int family, const char *p, unsigned prefixlen);
 333 void address_pool_free(AddressPool *p);
 334
 335 int address_pool_acquire(AddressPool *p, unsigned prefixlen, union in_addr_union *found);
 336
 337 /* Macros which append INTERFACE= to the message */
 338
 339 #define log_full_link(level, link, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", link->ifname, "%-*s: " fmt, IFNAMSIZ, link->ifname, ##__VA_ARGS__)
 340 #define log_debug_link(link, ...)       log_full_link(LOG_DEBUG, link, ##__VA_ARGS__)
 341 #define log_info_link(link, ...)        log_full_link(LOG_INFO, link, ##__VA_ARGS__)
 342 #define log_notice_link(link, ...)      log_full_link(LOG_NOTICE, link, ##__VA_ARGS__)
 343 #define log_warning_link(link, ...)     log_full_link(LOG_WARNING, link, ##__VA_ARGS__)
 344 #define log_error_link(link, ...)       log_full_link(LOG_ERR, link, ##__VA_ARGS__)
 345
 346 #define log_struct_link(level, link, ...) log_struct(level, "INTERFACE=%s", link->ifname, __VA_ARGS__)
 347
 348 #define ADDRESS_FMT_VAL(address)            \
 349         (address).s_addr & 0xFF,            \
 350         ((address).s_addr >> 8) & 0xFF,     \
 351         ((address).s_addr >> 16) & 0xFF,    \
 352         (address).s_addr >> 24