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         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         sd_event_source *sigterm_event_source;
 178         sd_event_source *sigint_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 /* gperf */
 265 const struct ConfigPerfItem* network_network_gperf_lookup(const char *key, unsigned length);
 266
 267 /* Route */
 268 int route_new_static(Network *network, unsigned section, Route **ret);
 269 int route_new_dynamic(Route **ret, unsigned char rtm_protocol);
 270 void route_free(Route *route);
 271 int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 272 int route_drop(Route *route, Link *link, sd_rtnl_message_handler_t callback);
 273
 274
 275 DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
 276 #define _cleanup_route_free_ _cleanup_(route_freep)
 277
 278 int config_parse_gateway(const char *unit, const char *filename, unsigned line,
 279                          const char *section, unsigned section_line, const char *lvalue,
 280                          int ltype, const char *rvalue, void *data, void *userdata);
 281
 282 int config_parse_destination(const char *unit, const char *filename, unsigned line,
 283                              const char *section, unsigned section_line, const char *lvalue,
 284                              int ltype, const char *rvalue, void *data, void *userdata);
 285
 286 int config_parse_route_priority(const char *unit, const char *filename, unsigned line,
 287                                 const char *section, unsigned section_line, const char *lvalue,
 288                                 int ltype, const char *rvalue, void *data, void *userdata);
 289 /* Address */
 290 int address_new_static(Network *network, unsigned section, Address **ret);
 291 int address_new_dynamic(Address **ret);
 292 void address_free(Address *address);
 293 int address_configure(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 294 int address_update(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 295 int address_drop(Address *address, Link *link, sd_rtnl_message_handler_t callback);
 296 bool address_equal(Address *a1, Address *a2);
 297
 298 DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
 299 #define _cleanup_address_free_ _cleanup_(address_freep)
 300
 301 int config_parse_address(const char *unit, const char *filename, unsigned line,
 302                          const char *section, unsigned section_line, const char *lvalue,
 303                          int ltype, const char *rvalue, void *data, void *userdata);
 304
 305 int config_parse_broadcast(const char *unit, const char *filename, unsigned line,
 306                            const char *section, unsigned section_line, const char *lvalue,
 307                            int ltype, const char *rvalue, void *data, void *userdata);
 308
 309 int config_parse_label(const char *unit, const char *filename, unsigned line,
 310                        const char *section, unsigned section_line, const char *lvalue,
 311                        int ltype, const char *rvalue, void *data, void *userdata);
 312
 313 /* DHCP support */
 314
 315 const char* dhcp_support_to_string(DHCPSupport i) _const_;
 316 DHCPSupport dhcp_support_from_string(const char *s) _pure_;
 317
 318 int config_parse_dhcp(const char *unit, const char *filename, unsigned line,
 319                       const char *section, unsigned section_line, const char *lvalue,
 320                       int ltype, const char *rvalue, void *data, void *userdata);
 321
 322 /* LLMNR support */
 323
 324 const char* llmnr_support_to_string(LLMNRSupport i) _const_;
 325 LLMNRSupport llmnr_support_from_string(const char *s) _pure_;
 326
 327 int config_parse_llmnr(const char *unit, const char *filename, unsigned line,
 328                       const char *section, unsigned section_line, const char *lvalue,
 329                       int ltype, const char *rvalue, void *data, void *userdata);
 330
 331 /* Address Pool */
 332
 333 int address_pool_new(Manager *m, AddressPool **ret, int family, const union in_addr_union *u, unsigned prefixlen);
 334 int address_pool_new_from_string(Manager *m, AddressPool **ret, int family, const char *p, unsigned prefixlen);
 335 void address_pool_free(AddressPool *p);
 336
 337 int address_pool_acquire(AddressPool *p, unsigned prefixlen, union in_addr_union *found);
 338
 339 /* Macros which append INTERFACE= to the message */
 340
 341 #define log_full_link(level, link, fmt, ...) log_meta_object(level, __FILE__, __LINE__, __func__, "INTERFACE=", link->ifname, "%-*s: " fmt, IFNAMSIZ, link->ifname, ##__VA_ARGS__)
 342 #define log_debug_link(link, ...)       log_full_link(LOG_DEBUG, link, ##__VA_ARGS__)
 343 #define log_info_link(link, ...)        log_full_link(LOG_INFO, link, ##__VA_ARGS__)
 344 #define log_notice_link(link, ...)      log_full_link(LOG_NOTICE, link, ##__VA_ARGS__)
 345 #define log_warning_link(link, ...)     log_full_link(LOG_WARNING, link, ##__VA_ARGS__)
 346 #define log_error_link(link, ...)       log_full_link(LOG_ERR, link, ##__VA_ARGS__)
 347
 348 #define log_struct_link(level, link, ...) log_struct(level, "INTERFACE=%s", link->ifname, __VA_ARGS__)
 349
 350 #define ADDRESS_FMT_VAL(address)            \
 351         (address).s_addr & 0xFF,            \
 352         ((address).s_addr >> 8) & 0xFF,     \
 353         ((address).s_addr >> 16) & 0xFF,    \
 354         (address).s_addr >> 24