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 "dhcp-identifier.h"
  15 #include "hashmap.h"
  16 #include "resolve-util.h"
  17
  18 #include "networkd-address.h"
  19 #include "networkd-address-label.h"
  20 #include "networkd-brvlan.h"
  21 #include "networkd-fdb.h"
  22 #include "networkd-lldp-tx.h"
  23 #include "networkd-ipv6-proxy-ndp.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 "netdev/netdev.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 #define IPV6_MIN_MTU 1280
  37
  38 typedef enum DHCPClientIdentifier {
  39         DHCP_CLIENT_ID_MAC,
  40         DHCP_CLIENT_ID_DUID,
  41         /* The following option may not be good for RFC regarding DHCP (3315 and 4361).
  42          * But some setups require this. E.g., Sky Broadband, the second largest provider in the UK
  43          * requires the client id to be set to a custom string, reported at
  44          * https://github.com/systemd/systemd/issues/7828 */
  45         DHCP_CLIENT_ID_DUID_ONLY,
  46         _DHCP_CLIENT_ID_MAX,
  47         _DHCP_CLIENT_ID_INVALID = -1,
  48 } DHCPClientIdentifier;
  49
  50 typedef enum IPv6PrivacyExtensions {
  51         /* The values map to the kernel's /proc/sys/net/ipv6/conf/xxx/use_tempaddr values */
  52         IPV6_PRIVACY_EXTENSIONS_NO,
  53         IPV6_PRIVACY_EXTENSIONS_PREFER_PUBLIC,
  54         IPV6_PRIVACY_EXTENSIONS_YES, /* aka prefer-temporary */
  55         _IPV6_PRIVACY_EXTENSIONS_MAX,
  56         _IPV6_PRIVACY_EXTENSIONS_INVALID = -1,
  57 } IPv6PrivacyExtensions;
  58
  59 typedef enum DHCPUseDomains {
  60         DHCP_USE_DOMAINS_NO,
  61         DHCP_USE_DOMAINS_YES,
  62         DHCP_USE_DOMAINS_ROUTE,
  63         _DHCP_USE_DOMAINS_MAX,
  64         _DHCP_USE_DOMAINS_INVALID = -1,
  65 } DHCPUseDomains;
  66
  67 typedef enum LLDPMode {
  68         LLDP_MODE_NO = 0,
  69         LLDP_MODE_YES = 1,
  70         LLDP_MODE_ROUTERS_ONLY = 2,
  71         _LLDP_MODE_MAX,
  72         _LLDP_MODE_INVALID = -1,
  73 } LLDPMode;
  74
  75 typedef struct DUID {
  76         /* Value of Type in [DHCP] section */
  77         DUIDType type;
  78
  79         uint8_t raw_data_len;
  80         uint8_t raw_data[MAX_DUID_LEN];
  81 } DUID;
  82
  83 typedef enum RADVPrefixDelegation {
  84         RADV_PREFIX_DELEGATION_NONE,
  85         RADV_PREFIX_DELEGATION_STATIC,
  86         RADV_PREFIX_DELEGATION_DHCP6,
  87         RADV_PREFIX_DELEGATION_BOTH,
  88 } RADVPrefixDelegation;
  89
  90 typedef struct NetworkConfigSection {
  91         unsigned line;
  92         char filename[];
  93 } NetworkConfigSection;
  94
  95 int network_config_section_new(const char *filename, unsigned line, NetworkConfigSection **s);
  96 void network_config_section_free(NetworkConfigSection *network);
  97
  98 DEFINE_TRIVIAL_CLEANUP_FUNC(NetworkConfigSection*, network_config_section_free);
  99
 100 typedef struct Manager Manager;
 101
 102 struct Network {
 103         Manager *manager;
 104
 105         char *filename;
 106         char *name;
 107
 108         struct ether_addr *match_mac;
 109         char **match_path;
 110         char **match_driver;
 111         char **match_type;
 112         char **match_name;
 113
 114         Condition *match_host;
 115         Condition *match_virt;
 116         Condition *match_kernel_cmdline;
 117         Condition *match_kernel_version;
 118         Condition *match_arch;
 119
 120         char *description;
 121
 122         NetDev *bridge;
 123         NetDev *bond;
 124         NetDev *vrf;
 125         Hashmap *stacked_netdevs;
 126
 127         /* DHCP Client Support */
 128         AddressFamilyBoolean dhcp;
 129         DHCPClientIdentifier dhcp_client_identifier;
 130         char *dhcp_vendor_class_identifier;
 131         char *dhcp_hostname;
 132         unsigned dhcp_route_metric;
 133         uint32_t dhcp_route_table;
 134         uint16_t dhcp_client_port;
 135         bool dhcp_anonymize;
 136         bool dhcp_send_hostname;
 137         bool dhcp_broadcast;
 138         bool dhcp_critical;
 139         bool dhcp_use_dns;
 140         bool dhcp_use_ntp;
 141         bool dhcp_use_mtu;
 142         bool dhcp_use_routes;
 143         bool dhcp_use_timezone;
 144         bool rapid_commit;
 145         bool dhcp_use_hostname;
 146         bool dhcp_route_table_set;
 147         DHCPUseDomains dhcp_use_domains;
 148
 149         /* DHCP Server Support */
 150         bool dhcp_server;
 151         bool dhcp_server_emit_dns;
 152         struct in_addr *dhcp_server_dns;
 153         unsigned n_dhcp_server_dns;
 154         bool dhcp_server_emit_ntp;
 155         struct in_addr *dhcp_server_ntp;
 156         unsigned n_dhcp_server_ntp;
 157         bool dhcp_server_emit_router;
 158         bool dhcp_server_emit_timezone;
 159         char *dhcp_server_timezone;
 160         usec_t dhcp_server_default_lease_time_usec, dhcp_server_max_lease_time_usec;
 161         uint32_t dhcp_server_pool_offset;
 162         uint32_t dhcp_server_pool_size;
 163
 164         /* IPV4LL Support */
 165         AddressFamilyBoolean link_local;
 166         bool ipv4ll_route;
 167
 168         /* IPv6 prefix delegation support */
 169         RADVPrefixDelegation router_prefix_delegation;
 170         usec_t router_lifetime_usec;
 171         uint8_t router_preference;
 172         bool router_managed;
 173         bool router_other_information;
 174         bool router_emit_dns;
 175         bool router_emit_domains;
 176         usec_t router_dns_lifetime_usec;
 177         struct in6_addr *router_dns;
 178         unsigned n_router_dns;
 179         char **router_search_domains;
 180
 181         /* Bridge Support */
 182         bool use_bpdu;
 183         bool hairpin;
 184         bool fast_leave;
 185         bool allow_port_to_be_root;
 186         bool unicast_flood;
 187         uint32_t cost;
 188         uint16_t priority;
 189
 190         bool use_br_vlan;
 191         uint16_t pvid;
 192         uint32_t br_vid_bitmap[BRIDGE_VLAN_BITMAP_LEN];
 193         uint32_t br_untagged_bitmap[BRIDGE_VLAN_BITMAP_LEN];
 194
 195         AddressFamilyBoolean ip_forward;
 196         bool ip_masquerade;
 197
 198         int ipv6_accept_ra;
 199         int ipv6_dad_transmits;
 200         int ipv6_hop_limit;
 201         int ipv6_proxy_ndp;
 202         int proxy_arp;
 203         unsigned ipv6_mtu;
 204
 205         bool ipv6_accept_ra_use_dns;
 206         bool active_slave;
 207         bool primary_slave;
 208         DHCPUseDomains ipv6_accept_ra_use_domains;
 209         uint32_t ipv6_accept_ra_route_table;
 210
 211         union in_addr_union ipv6_token;
 212         IPv6PrivacyExtensions ipv6_privacy_extensions;
 213
 214         struct ether_addr *mac;
 215         size_t mtu;
 216         int arp;
 217         bool unmanaged;
 218         bool configure_without_carrier;
 219         uint32_t iaid;
 220         DUID duid;
 221
 222         bool required_for_online; /* Is this network required to be considered online? */
 223
 224         LLDPMode lldp_mode; /* LLDP reception */
 225         LLDPEmit lldp_emit; /* LLDP transmission */
 226
 227         LIST_HEAD(Address, static_addresses);
 228         LIST_HEAD(Route, static_routes);
 229         LIST_HEAD(FdbEntry, static_fdb_entries);
 230         LIST_HEAD(IPv6ProxyNDPAddress, ipv6_proxy_ndp_addresses);
 231         LIST_HEAD(AddressLabel, address_labels);
 232         LIST_HEAD(Prefix, static_prefixes);
 233         LIST_HEAD(RoutingPolicyRule, rules);
 234
 235         unsigned n_static_addresses;
 236         unsigned n_static_routes;
 237         unsigned n_static_fdb_entries;
 238         unsigned n_ipv6_proxy_ndp_addresses;
 239         unsigned n_address_labels;
 240         unsigned n_static_prefixes;
 241         unsigned n_rules;
 242
 243         Hashmap *addresses_by_section;
 244         Hashmap *routes_by_section;
 245         Hashmap *fdb_entries_by_section;
 246         Hashmap *address_labels_by_section;
 247         Hashmap *prefixes_by_section;
 248         Hashmap *rules_by_section;
 249
 250         struct in_addr_data *dns;
 251         unsigned n_dns;
 252
 253         char **search_domains, **route_domains, **ntp, **bind_carrier;
 254
 255         ResolveSupport llmnr;
 256         ResolveSupport mdns;
 257         DnssecMode dnssec_mode;
 258         Set *dnssec_negative_trust_anchors;
 259
 260         LIST_FIELDS(Network, networks);
 261 };
 262
 263 void network_free(Network *network);
 264
 265 DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
 266
 267 int network_load(Manager *manager);
 268
 269 int network_get_by_name(Manager *manager, const char *name, Network **ret);
 270 int network_get(Manager *manager, struct udev_device *device, const char *ifname, const struct ether_addr *mac, Network **ret);
 271 int network_apply(Network *network, Link *link);
 272 void network_apply_anonymize_if_set(Network *network);
 273
 274 bool network_has_static_ipv6_addresses(Network *network);
 275
 276 int config_parse_netdev(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 277 int config_parse_domains(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 278 int config_parse_tunnel(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 279 int config_parse_dhcp(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 280 int config_parse_dns(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 281 int config_parse_dhcp_client_identifier(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 282 int config_parse_ipv6token(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 283 int config_parse_ipv6_privacy_extensions(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 284 int config_parse_hostname(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 285 int config_parse_timezone(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 286 int config_parse_dhcp_server_dns(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 287 int config_parse_radv_dns(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 288 int config_parse_radv_search_domains(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 289 int config_parse_dhcp_server_ntp(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 290 int config_parse_dnssec_negative_trust_anchors(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 291 int config_parse_dhcp_use_domains(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 292 int config_parse_lldp_mode(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 293 int config_parse_dhcp_route_table(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 294 int config_parse_ntp(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 295 int config_parse_ipv6_mtu(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 296 /* Legacy IPv4LL support */
 297 int config_parse_ipv4ll(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 298
 299 const struct ConfigPerfItem* network_network_gperf_lookup(const char *key, GPERF_LEN_TYPE length);
 300
 301 extern const sd_bus_vtable network_vtable[];
 302
 303 int network_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error);
 304 int network_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error);
 305
 306 const char* ipv6_privacy_extensions_to_string(IPv6PrivacyExtensions i) _const_;
 307 IPv6PrivacyExtensions ipv6_privacy_extensions_from_string(const char *s) _pure_;
 308
 309 const char* dhcp_use_domains_to_string(DHCPUseDomains p) _const_;
 310 DHCPUseDomains dhcp_use_domains_from_string(const char *s) _pure_;
 311
 312 const char* lldp_mode_to_string(LLDPMode m) _const_;
 313 LLDPMode lldp_mode_from_string(const char *s) _pure_;