src/network/networkd-network.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   This file is part of systemd.
   6
   7   Copyright 2013 Tom Gundersen <teg@jklm.no>
   8 ***/
   9
  10 #include "sd-bus.h"
  11 #include "udev.h"
  12
  13 #include "condition.h"
  14 #include "conf-parser.h"
  15 #include "dhcp-identifier.h"
  16 #include "hashmap.h"
  17 #include "netdev/netdev.h"
  18 #include "networkd-address-label.h"
  19 #include "networkd-address.h"
  20 #include "networkd-brvlan.h"
  21 #include "networkd-fdb.h"
  22 #include "networkd-ipv6-proxy-ndp.h"
  23 #include "networkd-lldp-tx.h"
  24 #include "networkd-radv.h"
  25 #include "networkd-route.h"
  26 #include "networkd-routing-policy-rule.h"
  27 #include "networkd-util.h"
  28 #include "resolve-util.h"
  29
  30 #define DHCP_ROUTE_METRIC 1024
  31 #define IPV4LL_ROUTE_METRIC 2048
  32
  33 #define BRIDGE_VLAN_BITMAP_MAX 4096
  34 #define BRIDGE_VLAN_BITMAP_LEN (BRIDGE_VLAN_BITMAP_MAX / 32)
  35
  36 typedef enum DHCPClientIdentifier {
  37         DHCP_CLIENT_ID_MAC,
  38         DHCP_CLIENT_ID_DUID,
  39         /* The following option may not be good for RFC regarding DHCP (3315 and 4361).
  40          * But some setups require this. E.g., Sky Broadband, the second largest provider in the UK
  41          * requires the client id to be set to a custom string, reported at
  42          * https://github.com/systemd/systemd/issues/7828 */
  43         DHCP_CLIENT_ID_DUID_ONLY,
  44         _DHCP_CLIENT_ID_MAX,
  45         _DHCP_CLIENT_ID_INVALID = -1,
  46 } DHCPClientIdentifier;
  47
  48 typedef enum IPv6PrivacyExtensions {
  49         /* The values map to the kernel's /proc/sys/net/ipv6/conf/xxx/use_tempaddr values */
  50         IPV6_PRIVACY_EXTENSIONS_NO,
  51         IPV6_PRIVACY_EXTENSIONS_PREFER_PUBLIC,
  52         IPV6_PRIVACY_EXTENSIONS_YES, /* aka prefer-temporary */
  53         _IPV6_PRIVACY_EXTENSIONS_MAX,
  54         _IPV6_PRIVACY_EXTENSIONS_INVALID = -1,
  55 } IPv6PrivacyExtensions;
  56
  57 typedef enum DHCPUseDomains {
  58         DHCP_USE_DOMAINS_NO,
  59         DHCP_USE_DOMAINS_YES,
  60         DHCP_USE_DOMAINS_ROUTE,
  61         _DHCP_USE_DOMAINS_MAX,
  62         _DHCP_USE_DOMAINS_INVALID = -1,
  63 } DHCPUseDomains;
  64
  65 typedef enum LLDPMode {
  66         LLDP_MODE_NO = 0,
  67         LLDP_MODE_YES = 1,
  68         LLDP_MODE_ROUTERS_ONLY = 2,
  69         _LLDP_MODE_MAX,
  70         _LLDP_MODE_INVALID = -1,
  71 } LLDPMode;
  72
  73 typedef struct DUID {
  74         /* Value of Type in [DHCP] section */
  75         DUIDType type;
  76
  77         uint8_t raw_data_len;
  78         uint8_t raw_data[MAX_DUID_LEN];
  79 } DUID;
  80
  81 typedef enum RADVPrefixDelegation {
  82         RADV_PREFIX_DELEGATION_NONE,
  83         RADV_PREFIX_DELEGATION_STATIC,
  84         RADV_PREFIX_DELEGATION_DHCP6,
  85         RADV_PREFIX_DELEGATION_BOTH,
  86 } RADVPrefixDelegation;
  87
  88 typedef struct NetworkConfigSection {
  89         unsigned line;
  90         char filename[];
  91 } NetworkConfigSection;
  92
  93 int network_config_section_new(const char *filename, unsigned line, NetworkConfigSection **s);
  94 void network_config_section_free(NetworkConfigSection *network);
  95
  96 DEFINE_TRIVIAL_CLEANUP_FUNC(NetworkConfigSection*, network_config_section_free);
  97
  98 typedef struct Manager Manager;
  99
 100 struct Network {
 101         Manager *manager;
 102
 103         char *filename;
 104         char *name;
 105
 106         Set *match_mac;
 107         char **match_path;
 108         char **match_driver;
 109         char **match_type;
 110         char **match_name;
 111
 112         Condition *match_host;
 113         Condition *match_virt;
 114         Condition *match_kernel_cmdline;
 115         Condition *match_kernel_version;
 116         Condition *match_arch;
 117
 118         char *description;
 119
 120         NetDev *bridge;
 121         NetDev *bond;
 122         NetDev *vrf;
 123         Hashmap *stacked_netdevs;
 124
 125         /* DHCP Client Support */
 126         AddressFamilyBoolean dhcp;
 127         DHCPClientIdentifier dhcp_client_identifier;
 128         char *dhcp_vendor_class_identifier;
 129         char **dhcp_user_class;
 130         char *dhcp_hostname;
 131         unsigned dhcp_route_metric;
 132         uint32_t dhcp_route_table;
 133         uint16_t dhcp_client_port;
 134         bool dhcp_anonymize;
 135         bool dhcp_send_hostname;
 136         bool dhcp_broadcast;
 137         bool dhcp_critical;
 138         bool dhcp_use_dns;
 139         bool dhcp_use_ntp;
 140         bool dhcp_use_mtu;
 141         bool dhcp_use_routes;
 142         bool dhcp_use_timezone;
 143         bool rapid_commit;
 144         bool dhcp_use_hostname;
 145         bool dhcp_route_table_set;
 146         DHCPUseDomains dhcp_use_domains;
 147
 148         /* DHCP Server Support */
 149         bool dhcp_server;
 150         bool dhcp_server_emit_dns;
 151         struct in_addr *dhcp_server_dns;
 152         unsigned n_dhcp_server_dns;
 153         bool dhcp_server_emit_ntp;
 154         struct in_addr *dhcp_server_ntp;
 155         unsigned n_dhcp_server_ntp;
 156         bool dhcp_server_emit_router;
 157         bool dhcp_server_emit_timezone;
 158         char *dhcp_server_timezone;
 159         usec_t dhcp_server_default_lease_time_usec, dhcp_server_max_lease_time_usec;
 160         uint32_t dhcp_server_pool_offset;
 161         uint32_t dhcp_server_pool_size;
 162
 163         /* IPV4LL Support */
 164         AddressFamilyBoolean link_local;
 165         bool ipv4ll_route;
 166
 167         /* IPv6 prefix delegation support */
 168         RADVPrefixDelegation router_prefix_delegation;
 169         usec_t router_lifetime_usec;
 170         uint8_t router_preference;
 171         bool router_managed;
 172         bool router_other_information;
 173         bool router_emit_dns;
 174         bool router_emit_domains;
 175         usec_t router_dns_lifetime_usec;
 176         struct in6_addr *router_dns;
 177         unsigned n_router_dns;
 178         char **router_search_domains;
 179
 180         /* Bridge Support */
 181         int use_bpdu;
 182         int hairpin;
 183         int fast_leave;
 184         int allow_port_to_be_root;
 185         int unicast_flood;
 186         uint32_t cost;
 187         uint16_t priority;
 188
 189         bool use_br_vlan;
 190         uint16_t pvid;
 191         uint32_t br_vid_bitmap[BRIDGE_VLAN_BITMAP_LEN];
 192         uint32_t br_untagged_bitmap[BRIDGE_VLAN_BITMAP_LEN];
 193
 194         /* CAN support */
 195         size_t can_bitrate;
 196         unsigned can_sample_point;
 197         usec_t can_restart_us;
 198
 199         AddressFamilyBoolean ip_forward;
 200         bool ip_masquerade;
 201
 202         int ipv6_accept_ra;
 203         int ipv6_dad_transmits;
 204         int ipv6_hop_limit;
 205         int ipv6_proxy_ndp;
 206         int proxy_arp;
 207         uint32_t ipv6_mtu;
 208
 209         bool ipv6_accept_ra_use_dns;
 210         bool active_slave;
 211         bool primary_slave;
 212         DHCPUseDomains ipv6_accept_ra_use_domains;
 213         uint32_t ipv6_accept_ra_route_table;
 214
 215         union in_addr_union ipv6_token;
 216         IPv6PrivacyExtensions ipv6_privacy_extensions;
 217
 218         struct ether_addr *mac;
 219         uint32_t mtu;
 220         int arp;
 221         int multicast;
 222         int allmulticast;
 223         bool unmanaged;
 224         bool configure_without_carrier;
 225         uint32_t iaid;
 226         DUID duid;
 227
 228         bool required_for_online; /* Is this network required to be considered online? */
 229
 230         LLDPMode lldp_mode; /* LLDP reception */
 231         LLDPEmit lldp_emit; /* LLDP transmission */
 232
 233         LIST_HEAD(Address, static_addresses);
 234         LIST_HEAD(Route, static_routes);
 235         LIST_HEAD(FdbEntry, static_fdb_entries);
 236         LIST_HEAD(IPv6ProxyNDPAddress, ipv6_proxy_ndp_addresses);
 237         LIST_HEAD(AddressLabel, address_labels);
 238         LIST_HEAD(Prefix, static_prefixes);
 239         LIST_HEAD(RoutingPolicyRule, rules);
 240
 241         unsigned n_static_addresses;
 242         unsigned n_static_routes;
 243         unsigned n_static_fdb_entries;
 244         unsigned n_ipv6_proxy_ndp_addresses;
 245         unsigned n_address_labels;
 246         unsigned n_static_prefixes;
 247         unsigned n_rules;
 248
 249         Hashmap *addresses_by_section;
 250         Hashmap *routes_by_section;
 251         Hashmap *fdb_entries_by_section;
 252         Hashmap *address_labels_by_section;
 253         Hashmap *prefixes_by_section;
 254         Hashmap *rules_by_section;
 255
 256         struct in_addr_data *dns;
 257         unsigned n_dns;
 258
 259         char **search_domains, **route_domains, **ntp, **bind_carrier;
 260
 261         ResolveSupport llmnr;
 262         ResolveSupport mdns;
 263         DnssecMode dnssec_mode;
 264         PrivateDnsMode private_dns_mode;
 265         Set *dnssec_negative_trust_anchors;
 266
 267         LIST_FIELDS(Network, networks);
 268 };
 269
 270 void network_free(Network *network);
 271
 272 DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
 273
 274 int network_load(Manager *manager);
 275
 276 int network_get_by_name(Manager *manager, const char *name, Network **ret);
 277 int network_get(Manager *manager, struct udev_device *device, const char *ifname, const struct ether_addr *mac, Network **ret);
 278 int network_apply(Network *network, Link *link);
 279 void network_apply_anonymize_if_set(Network *network);
 280
 281 bool network_has_static_ipv6_addresses(Network *network);
 282
 283 CONFIG_PARSER_PROTOTYPE(config_parse_netdev);
 284 CONFIG_PARSER_PROTOTYPE(config_parse_domains);
 285 CONFIG_PARSER_PROTOTYPE(config_parse_tunnel);
 286 CONFIG_PARSER_PROTOTYPE(config_parse_dhcp);
 287 CONFIG_PARSER_PROTOTYPE(config_parse_dns);
 288 CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_client_identifier);
 289 CONFIG_PARSER_PROTOTYPE(config_parse_ipv6token);
 290 CONFIG_PARSER_PROTOTYPE(config_parse_ipv6_privacy_extensions);
 291 CONFIG_PARSER_PROTOTYPE(config_parse_hostname);
 292 CONFIG_PARSER_PROTOTYPE(config_parse_timezone);
 293 CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_server_dns);
 294 CONFIG_PARSER_PROTOTYPE(config_parse_radv_dns);
 295 CONFIG_PARSER_PROTOTYPE(config_parse_radv_search_domains);
 296 CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_server_ntp);
 297 CONFIG_PARSER_PROTOTYPE(config_parse_dnssec_negative_trust_anchors);
 298 CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_use_domains);
 299 CONFIG_PARSER_PROTOTYPE(config_parse_lldp_mode);
 300 CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_route_table);
 301 CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_user_class);
 302 CONFIG_PARSER_PROTOTYPE(config_parse_ntp);
 303 /* Legacy IPv4LL support */
 304 CONFIG_PARSER_PROTOTYPE(config_parse_ipv4ll);
 305
 306 const struct ConfigPerfItem* network_network_gperf_lookup(const char *key, GPERF_LEN_TYPE length);
 307
 308 extern const sd_bus_vtable network_vtable[];
 309
 310 int network_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error);
 311 int network_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error);
 312
 313 const char* ipv6_privacy_extensions_to_string(IPv6PrivacyExtensions i) _const_;
 314 IPv6PrivacyExtensions ipv6_privacy_extensions_from_string(const char *s) _pure_;
 315
 316 const char* dhcp_use_domains_to_string(DHCPUseDomains p) _const_;
 317 DHCPUseDomains dhcp_use_domains_from_string(const char *s) _pure_;
 318
 319 const char* lldp_mode_to_string(LLDPMode m) _const_;
 320 LLDPMode lldp_mode_from_string(const char *s) _pure_;