src/network/networkd-link.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 #include <endian.h>
   5 #include <linux/nl80211.h>
   6
   7 #include "sd-bus.h"
   8 #include "sd-device.h"
   9 #include "sd-dhcp-client.h"
  10 #include "sd-dhcp-server.h"
  11 #include "sd-dhcp6-client.h"
  12 #include "sd-ipv4ll.h"
  13 #include "sd-lldp.h"
  14 #include "sd-ndisc.h"
  15 #include "sd-radv.h"
  16 #include "sd-netlink.h"
  17
  18 #include "list.h"
  19 #include "log-link.h"
  20 #include "network-util.h"
  21 #include "networkd-util.h"
  22 #include "ordered-set.h"
  23 #include "resolve-util.h"
  24 #include "set.h"
  25
  26 typedef enum LinkState {
  27         LINK_STATE_PENDING,     /* udev has not initialized the link */
  28         LINK_STATE_INITIALIZED, /* udev has initialized the link */
  29         LINK_STATE_CONFIGURING, /* configuring addresses, routes, etc. */
  30         LINK_STATE_CONFIGURED,  /* everything is configured */
  31         LINK_STATE_UNMANAGED,   /* Unmanaged=yes is set */
  32         LINK_STATE_FAILED,      /* at least one configuration process failed */
  33         LINK_STATE_LINGER,      /* RTM_DELLINK for the link has been received */
  34         _LINK_STATE_MAX,
  35         _LINK_STATE_INVALID = -1
  36 } LinkState;
  37
  38 typedef enum LinkIPv6AddressGenMode {
  39        LINK_IPV6_ADDRESSS_GEN_MODE_EUI64          = IN6_ADDR_GEN_MODE_EUI64,
  40        LINK_IPV6_ADDRESSS_GEN_MODE_NONE           = IN6_ADDR_GEN_MODE_NONE,
  41        LINK_IPV6_ADDRESSS_GEN_MODE_STABLE_PRIVACY = IN6_ADDR_GEN_MODE_STABLE_PRIVACY,
  42        LINK_IPV6_ADDRESSS_GEN_MODE_RANDOM         = IN6_ADDR_GEN_MODE_RANDOM,
  43        _LINK_IPV6_ADDRESS_GEN_MODE_MAX,
  44        _LINK_IPV6_ADDRESS_GEN_MODE_INVALID        = -1
  45 } LinkIPv6AddressGenMode;
  46
  47 typedef struct Manager Manager;
  48 typedef struct Network Network;
  49 typedef struct Address Address;
  50 typedef struct DUID DUID;
  51
  52 typedef struct Link {
  53         Manager *manager;
  54
  55         unsigned n_ref;
  56
  57         int ifindex;
  58         int master_ifindex;
  59         char *ifname;
  60         char **alternative_names;
  61         char *kind;
  62         unsigned short iftype;
  63         char *state_file;
  64         struct ether_addr mac;
  65         struct ether_addr permanent_mac;
  66         struct in6_addr ipv6ll_address;
  67         uint32_t mtu;
  68         sd_device *sd_device;
  69
  70         /* wlan */
  71         enum nl80211_iftype wlan_iftype;
  72         char *ssid;
  73         struct ether_addr bssid;
  74
  75         unsigned flags;
  76         uint8_t kernel_operstate;
  77
  78         Network *network;
  79
  80         LinkState state;
  81         LinkOperationalState operstate;
  82         LinkCarrierState carrier_state;
  83         LinkAddressState address_state;
  84
  85         unsigned address_messages;
  86         unsigned address_label_messages;
  87         unsigned neighbor_messages;
  88         unsigned route_messages;
  89         unsigned nexthop_messages;
  90         unsigned routing_policy_rule_messages;
  91         unsigned routing_policy_rule_remove_messages;
  92         unsigned tc_messages;
  93         unsigned enslaving;
  94
  95         Set *addresses;
  96         Set *addresses_foreign;
  97         Set *neighbors;
  98         Set *neighbors_foreign;
  99         Set *routes;
 100         Set *routes_foreign;
 101         Set *nexthops;
 102         Set *nexthops_foreign;
 103
 104         sd_dhcp_client *dhcp_client;
 105         sd_dhcp_lease *dhcp_lease, *dhcp_lease_old;
 106         Set *dhcp_routes;
 107         char *lease_file;
 108         uint32_t original_mtu;
 109         unsigned dhcp4_messages;
 110         bool dhcp4_route_failed:1;
 111         bool dhcp4_route_retrying:1;
 112         bool dhcp4_configured:1;
 113         bool dhcp6_configured:1;
 114
 115         unsigned ndisc_messages;
 116         bool ndisc_configured;
 117
 118         sd_ipv4ll *ipv4ll;
 119         bool ipv4ll_address:1;
 120
 121         bool addresses_configured:1;
 122         bool addresses_ready:1;
 123         bool neighbors_configured:1;
 124         bool static_routes_configured:1;
 125         bool static_routes_ready:1;
 126         bool static_nexthops_configured:1;
 127         bool routing_policy_rules_configured:1;
 128         bool tc_configured:1;
 129         bool setting_mtu:1;
 130         bool setting_genmode:1;
 131         bool ipv6_mtu_set:1;
 132
 133         LIST_HEAD(Address, pool_addresses);
 134
 135         sd_dhcp_server *dhcp_server;
 136
 137         sd_ndisc *ndisc;
 138         Set *ndisc_rdnss;
 139         Set *ndisc_dnssl;
 140
 141         sd_radv *radv;
 142
 143         sd_dhcp6_client *dhcp6_client;
 144
 145         /* This is about LLDP reception */
 146         sd_lldp *lldp;
 147         char *lldp_file;
 148
 149         /* This is about LLDP transmission */
 150         unsigned lldp_tx_fast; /* The LLDP txFast counter (See 802.1ab-2009, section 9.2.5.18) */
 151         sd_event_source *lldp_emit_event_source;
 152
 153         Hashmap *bound_by_links;
 154         Hashmap *bound_to_links;
 155         Set *slaves;
 156
 157         /* For speed meter */
 158         struct rtnl_link_stats64 stats_old, stats_new;
 159         bool stats_updated;
 160
 161         /* All kinds of DNS configuration */
 162         struct in_addr_data *dns;
 163         unsigned n_dns;
 164         OrderedSet *search_domains, *route_domains;
 165
 166         int dns_default_route;
 167         ResolveSupport llmnr;
 168         ResolveSupport mdns;
 169         DnssecMode dnssec_mode;
 170         DnsOverTlsMode dns_over_tls_mode;
 171         Set *dnssec_negative_trust_anchors;
 172
 173         char **ntp;
 174 } Link;
 175
 176 typedef int (*link_netlink_message_handler_t)(sd_netlink*, sd_netlink_message*, Link*);
 177
 178 DUID *link_get_duid(Link *link);
 179 int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error);
 180
 181 void link_ntp_settings_clear(Link *link);
 182 void link_dns_settings_clear(Link *link);
 183 Link *link_unref(Link *link);
 184 Link *link_ref(Link *link);
 185 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
 186 DEFINE_TRIVIAL_DESTRUCTOR(link_netlink_destroy_callback, Link, link_unref);
 187
 188 int link_get(Manager *m, int ifindex, Link **ret);
 189 int link_add(Manager *manager, sd_netlink_message *message, Link **ret);
 190 void link_drop(Link *link);
 191
 192 int link_down(Link *link, link_netlink_message_handler_t callback);
 193
 194 void link_enter_failed(Link *link);
 195 int link_initialized(Link *link, sd_device *device);
 196
 197 void link_set_state(Link *link, LinkState state);
 198 void link_check_ready(Link *link);
 199
 200 void link_update_operstate(Link *link, bool also_update_bond_master);
 201 int link_update(Link *link, sd_netlink_message *message);
 202
 203 void link_dirty(Link *link);
 204 void link_clean(Link *link);
 205 int link_save(Link *link);
 206
 207 int link_carrier_reset(Link *link);
 208 bool link_has_carrier(Link *link);
 209
 210 int link_ipv6ll_gained(Link *link, const struct in6_addr *address);
 211
 212 int link_set_mtu(Link *link, uint32_t mtu);
 213
 214 bool link_ipv4ll_enabled(Link *link, AddressFamily mask);
 215
 216 int link_stop_clients(Link *link, bool may_keep_dhcp);
 217
 218 const char* link_state_to_string(LinkState s) _const_;
 219 LinkState link_state_from_string(const char *s) _pure_;
 220
 221 const char* link_ipv6_address_gen_mode_to_string(LinkIPv6AddressGenMode s) _const_;
 222 LinkIPv6AddressGenMode link_ipv6_address_gen_mode_from_string(const char *s) _pure_;
 223
 224 uint32_t link_get_vrf_table(Link *link);
 225 uint32_t link_get_dhcp_route_table(Link *link);
 226 uint32_t link_get_ipv6_accept_ra_route_table(Link *link);
 227 int link_request_set_routes(Link *link);
 228 int link_request_set_nexthop(Link *link);
 229
 230 int link_reconfigure(Link *link, bool force);
 231
 232 CONFIG_PARSER_PROTOTYPE(config_parse_link_ipv6_address_gen_mode);
 233
 234 int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg);
 235 #define log_link_message_error_errno(link, m, err, msg)   log_link_message_full_errno(link, m, LOG_ERR, err, msg)
 236 #define log_link_message_warning_errno(link, m, err, msg) log_link_message_full_errno(link, m, LOG_WARNING, err, msg)
 237 #define log_link_message_notice_errno(link, m, err, msg)  log_link_message_full_errno(link, m, LOG_NOTICE, err, msg)
 238 #define log_link_message_info_errno(link, m, err, msg)    log_link_message_full_errno(link, m, LOG_INFO, err, msg)
 239 #define log_link_message_debug_errno(link, m, err, msg)   log_link_message_full_errno(link, m, LOG_DEBUG, err, msg)
 240
 241 #define ADDRESS_FMT_VAL(address)                   \
 242         be32toh((address).s_addr) >> 24,           \
 243         (be32toh((address).s_addr) >> 16) & 0xFFu, \
 244         (be32toh((address).s_addr) >> 8) & 0xFFu,  \
 245         be32toh((address).s_addr) & 0xFFu