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 struct Manager Manager;
  39 typedef struct Network Network;
  40 typedef struct Address Address;
  41 typedef struct DUID DUID;
  42
  43 typedef struct Link {
  44         Manager *manager;
  45
  46         unsigned n_ref;
  47
  48         int ifindex;
  49         int master_ifindex;
  50         char *ifname;
  51         char **alternative_names;
  52         char *kind;
  53         unsigned short iftype;
  54         char *state_file;
  55         struct ether_addr mac;
  56         struct ether_addr permanent_mac;
  57         struct in6_addr ipv6ll_address;
  58         uint32_t mtu;
  59         sd_device *sd_device;
  60         char *driver;
  61
  62         /* wlan */
  63         enum nl80211_iftype wlan_iftype;
  64         char *ssid;
  65         struct ether_addr bssid;
  66
  67         unsigned flags;
  68         uint8_t kernel_operstate;
  69
  70         Network *network;
  71
  72         LinkState state;
  73         LinkOperationalState operstate;
  74         LinkCarrierState carrier_state;
  75         LinkAddressState address_state;
  76
  77         unsigned address_messages;
  78         unsigned address_label_messages;
  79         unsigned neighbor_messages;
  80         unsigned route_messages;
  81         unsigned nexthop_messages;
  82         unsigned routing_policy_rule_messages;
  83         unsigned routing_policy_rule_remove_messages;
  84         unsigned tc_messages;
  85         unsigned sr_iov_messages;
  86         unsigned enslaving;
  87
  88         Set *addresses;
  89         Set *addresses_foreign;
  90         Set *neighbors;
  91         Set *neighbors_foreign;
  92         Set *routes;
  93         Set *routes_foreign;
  94         Set *nexthops;
  95         Set *nexthops_foreign;
  96
  97         sd_dhcp_client *dhcp_client;
  98         sd_dhcp_lease *dhcp_lease;
  99         Address *dhcp_address, *dhcp_address_old;
 100         Set *dhcp_routes, *dhcp_routes_old;
 101         char *lease_file;
 102         uint32_t original_mtu;
 103         unsigned dhcp4_messages;
 104         unsigned dhcp4_remove_messages;
 105         unsigned dhcp6_address_messages;
 106         unsigned dhcp6_route_messages;
 107         unsigned dhcp6_pd_address_messages;
 108         unsigned dhcp6_pd_route_messages;
 109         bool dhcp4_route_failed:1;
 110         bool dhcp4_route_retrying:1;
 111         bool dhcp4_configured:1;
 112         bool dhcp4_address_bind:1;
 113         bool dhcp6_address_configured:1;
 114         bool dhcp6_route_configured:1;
 115         bool dhcp6_pd_address_configured:1;
 116         bool dhcp6_pd_route_configured:1;
 117
 118         unsigned ndisc_addresses_messages;
 119         unsigned ndisc_routes_messages;
 120         bool ndisc_addresses_configured:1;
 121         bool ndisc_routes_configured:1;
 122
 123         sd_ipv4ll *ipv4ll;
 124         bool ipv4ll_address:1;
 125
 126         bool addresses_configured:1;
 127         bool addresses_ready:1;
 128         bool neighbors_configured:1;
 129         bool static_routes_configured:1;
 130         bool static_nexthops_configured:1;
 131         bool routing_policy_rules_configured:1;
 132         bool tc_configured:1;
 133         bool sr_iov_configured:1;
 134         bool setting_mtu:1;
 135         bool setting_genmode:1;
 136         bool ipv6_mtu_set:1;
 137
 138         LIST_HEAD(Address, pool_addresses);
 139
 140         sd_dhcp_server *dhcp_server;
 141
 142         sd_ndisc *ndisc;
 143         Set *ndisc_rdnss;
 144         Set *ndisc_dnssl;
 145         Set *ndisc_addresses, *ndisc_addresses_old;
 146         Set *ndisc_routes, *ndisc_routes_old;
 147
 148         sd_radv *radv;
 149
 150         sd_dhcp6_client *dhcp6_client;
 151
 152         /* This is about LLDP reception */
 153         sd_lldp *lldp;
 154         char *lldp_file;
 155
 156         /* This is about LLDP transmission */
 157         unsigned lldp_tx_fast; /* The LLDP txFast counter (See 802.1ab-2009, section 9.2.5.18) */
 158         sd_event_source *lldp_emit_event_source;
 159
 160         Hashmap *bound_by_links;
 161         Hashmap *bound_to_links;
 162         Set *slaves;
 163
 164         /* For speed meter */
 165         struct rtnl_link_stats64 stats_old, stats_new;
 166         bool stats_updated;
 167
 168         /* All kinds of DNS configuration the user configured via D-Bus */
 169         struct in_addr_full **dns;
 170         unsigned n_dns;
 171         OrderedSet *search_domains, *route_domains;
 172
 173         int dns_default_route;
 174         ResolveSupport llmnr;
 175         ResolveSupport mdns;
 176         DnssecMode dnssec_mode;
 177         DnsOverTlsMode dns_over_tls_mode;
 178         Set *dnssec_negative_trust_anchors;
 179
 180         /* Similar, but NTP server configuration */
 181         char **ntp;
 182 } Link;
 183
 184 typedef int (*link_netlink_message_handler_t)(sd_netlink*, sd_netlink_message*, Link*);
 185
 186 DUID *link_get_duid(Link *link);
 187 int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error);
 188
 189 void link_ntp_settings_clear(Link *link);
 190 void link_dns_settings_clear(Link *link);
 191 Link *link_unref(Link *link);
 192 Link *link_ref(Link *link);
 193 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
 194 DEFINE_TRIVIAL_DESTRUCTOR(link_netlink_destroy_callback, Link, link_unref);
 195
 196 int link_get(Manager *m, int ifindex, Link **ret);
 197 int link_add(Manager *manager, sd_netlink_message *message, Link **ret);
 198 void link_drop(Link *link);
 199
 200 int link_down(Link *link, link_netlink_message_handler_t callback);
 201
 202 void link_enter_failed(Link *link);
 203 int link_initialized(Link *link, sd_device *device);
 204
 205 void link_set_state(Link *link, LinkState state);
 206 void link_check_ready(Link *link);
 207
 208 void link_update_operstate(Link *link, bool also_update_bond_master);
 209 int link_update(Link *link, sd_netlink_message *message);
 210
 211 void link_dirty(Link *link);
 212 void link_clean(Link *link);
 213 int link_save(Link *link);
 214 int link_save_and_clean(Link *link);
 215
 216 int link_carrier_reset(Link *link);
 217 bool link_has_carrier(Link *link);
 218
 219 int link_ipv6ll_gained(Link *link, const struct in6_addr *address);
 220
 221 int link_set_mtu(Link *link, uint32_t mtu);
 222
 223 bool link_ipv4ll_enabled(Link *link, AddressFamily mask);
 224
 225 int link_stop_clients(Link *link, bool may_keep_dhcp);
 226
 227 const char* link_state_to_string(LinkState s) _const_;
 228 LinkState link_state_from_string(const char *s) _pure_;
 229
 230 uint32_t link_get_vrf_table(Link *link);
 231 uint32_t link_get_dhcp_route_table(Link *link);
 232 uint32_t link_get_ipv6_accept_ra_route_table(Link *link);
 233 int link_request_set_routes(Link *link);
 234
 235 int link_reconfigure(Link *link, bool force);
 236
 237 int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg);
 238 #define log_link_message_error_errno(link, m, err, msg)   log_link_message_full_errno(link, m, LOG_ERR, err, msg)
 239 #define log_link_message_warning_errno(link, m, err, msg) log_link_message_full_errno(link, m, LOG_WARNING, err, msg)
 240 #define log_link_message_notice_errno(link, m, err, msg)  log_link_message_full_errno(link, m, LOG_NOTICE, err, msg)
 241 #define log_link_message_info_errno(link, m, err, msg)    log_link_message_full_errno(link, m, LOG_INFO, err, msg)
 242 #define log_link_message_debug_errno(link, m, err, msg)   log_link_message_full_errno(link, m, LOG_DEBUG, err, msg)
 243
 244 #define ADDRESS_FMT_VAL(address)                   \
 245         be32toh((address).s_addr) >> 24,           \
 246         (be32toh((address).s_addr) >> 16) & 0xFFu, \
 247         (be32toh((address).s_addr) >> 8) & 0xFFu,  \
 248         be32toh((address).s_addr) & 0xFFu