src/network/networkd-link.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   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-ipv4acd.h"
  13 #include "sd-ipv4ll.h"
  14 #include "sd-lldp-rx.h"
  15 #include "sd-lldp-tx.h"
  16 #include "sd-ndisc.h"
  17 #include "sd-radv.h"
  18 #include "sd-netlink.h"
  19
  20 #include "ether-addr-util.h"
  21 #include "log-link.h"
  22 #include "netif-util.h"
  23 #include "network-util.h"
  24 #include "networkd-ipv6ll.h"
  25 #include "networkd-util.h"
  26 #include "ordered-set.h"
  27 #include "resolve-util.h"
  28 #include "set.h"
  29
  30 typedef enum LinkState {
  31         LINK_STATE_PENDING,     /* udev has not initialized the link */
  32         LINK_STATE_INITIALIZED, /* udev has initialized the link */
  33         LINK_STATE_CONFIGURING, /* configuring addresses, routes, etc. */
  34         LINK_STATE_CONFIGURED,  /* everything is configured */
  35         LINK_STATE_UNMANAGED,   /* Unmanaged=yes is set */
  36         LINK_STATE_FAILED,      /* at least one configuration process failed */
  37         LINK_STATE_LINGER,      /* RTM_DELLINK for the link has been received */
  38         _LINK_STATE_MAX,
  39         _LINK_STATE_INVALID = -EINVAL,
  40 } LinkState;
  41
  42 typedef struct Manager Manager;
  43 typedef struct Network Network;
  44 typedef struct NetDev NetDev;
  45 typedef struct DUID DUID;
  46
  47 typedef struct Link {
  48         Manager *manager;
  49
  50         unsigned n_ref;
  51
  52         int ifindex;
  53         int master_ifindex;
  54         int dsa_master_ifindex;
  55         char *ifname;
  56         char **alternative_names;
  57         char *kind;
  58         unsigned short iftype;
  59         char *state_file;
  60         struct hw_addr_data hw_addr;
  61         struct hw_addr_data bcast_addr;
  62         struct hw_addr_data permanent_hw_addr;
  63         struct hw_addr_data requested_hw_addr;
  64         struct in6_addr ipv6ll_address;
  65         uint32_t mtu;
  66         uint32_t min_mtu;
  67         uint32_t max_mtu;
  68         uint32_t original_mtu;
  69         sd_device *dev;
  70         char *driver;
  71
  72         /* link-local addressing */
  73         IPv6LinkLocalAddressGenMode ipv6ll_address_gen_mode;
  74
  75         /* wlan */
  76         enum nl80211_iftype wlan_iftype;
  77         char *ssid;
  78         char *previous_ssid;
  79         struct ether_addr bssid;
  80
  81         unsigned flags;
  82         uint8_t kernel_operstate;
  83
  84         sd_event_source *carrier_lost_timer;
  85
  86         Network *network;
  87         NetDev *netdev;
  88
  89         LinkState state;
  90         LinkOperationalState operstate;
  91         LinkCarrierState carrier_state;
  92         LinkAddressState address_state;
  93         LinkAddressState ipv4_address_state;
  94         LinkAddressState ipv6_address_state;
  95         LinkOnlineState online_state;
  96
  97         unsigned static_address_messages;
  98         unsigned static_address_label_messages;
  99         unsigned static_bridge_fdb_messages;
 100         unsigned static_bridge_mdb_messages;
 101         unsigned static_ipv6_proxy_ndp_messages;
 102         unsigned static_neighbor_messages;
 103         unsigned static_nexthop_messages;
 104         unsigned static_route_messages;
 105         unsigned static_routing_policy_rule_messages;
 106         unsigned tc_messages;
 107         unsigned sr_iov_messages;
 108         unsigned set_link_messages;
 109         unsigned set_flags_messages;
 110         unsigned create_stacked_netdev_messages;
 111
 112         Set *addresses;
 113         Set *neighbors;
 114         Set *routes;
 115         Set *nexthops;
 116         Set *qdiscs;
 117         Set *tclasses;
 118
 119         sd_dhcp_client *dhcp_client;
 120         sd_dhcp_lease *dhcp_lease;
 121         char *lease_file;
 122         unsigned dhcp4_messages;
 123         bool dhcp4_configured:1;
 124         char *dhcp4_6rd_tunnel_name;
 125
 126         sd_ipv4ll *ipv4ll;
 127         bool ipv4ll_address_configured:1;
 128
 129         bool static_addresses_configured:1;
 130         bool static_address_labels_configured:1;
 131         bool static_bridge_fdb_configured:1;
 132         bool static_bridge_mdb_configured:1;
 133         bool static_ipv6_proxy_ndp_configured:1;
 134         bool static_neighbors_configured:1;
 135         bool static_nexthops_configured:1;
 136         bool static_routes_configured:1;
 137         bool static_routing_policy_rules_configured:1;
 138         bool tc_configured:1;
 139         bool sr_iov_configured:1;
 140         bool activated:1;
 141         bool master_set:1;
 142         bool stacked_netdevs_created:1;
 143
 144         sd_dhcp_server *dhcp_server;
 145
 146         sd_ndisc *ndisc;
 147         Set *ndisc_rdnss;
 148         Set *ndisc_dnssl;
 149         unsigned ndisc_messages;
 150         bool ndisc_configured:1;
 151
 152         sd_radv *radv;
 153
 154         sd_dhcp6_client *dhcp6_client;
 155         sd_dhcp6_lease *dhcp6_lease;
 156         unsigned dhcp6_messages;
 157         bool dhcp6_configured;
 158
 159         Set *dhcp_pd_prefixes;
 160         unsigned dhcp_pd_messages;
 161         bool dhcp_pd_configured;
 162
 163         /* This is about LLDP reception */
 164         sd_lldp_rx *lldp_rx;
 165         char *lldp_file;
 166
 167         /* This is about LLDP transmission */
 168         sd_lldp_tx *lldp_tx;
 169
 170         Hashmap *bound_by_links;
 171         Hashmap *bound_to_links;
 172         Set *slaves;
 173
 174         /* For speed meter */
 175         struct rtnl_link_stats64 stats_old, stats_new;
 176         bool stats_updated;
 177
 178         /* All kinds of DNS configuration the user configured via D-Bus */
 179         struct in_addr_full **dns;
 180         unsigned n_dns;
 181         OrderedSet *search_domains, *route_domains;
 182
 183         int dns_default_route;
 184         ResolveSupport llmnr;
 185         ResolveSupport mdns;
 186         DnssecMode dnssec_mode;
 187         DnsOverTlsMode dns_over_tls_mode;
 188         Set *dnssec_negative_trust_anchors;
 189
 190         /* Similar, but NTP server configuration */
 191         char **ntp;
 192 } Link;
 193
 194 typedef int (*link_netlink_message_handler_t)(sd_netlink*, sd_netlink_message*, Link*);
 195
 196 bool link_is_ready_to_configure(Link *link, bool allow_unmanaged);
 197
 198 void link_ntp_settings_clear(Link *link);
 199 void link_dns_settings_clear(Link *link);
 200 Link *link_unref(Link *link);
 201 Link *link_ref(Link *link);
 202 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
 203 DEFINE_TRIVIAL_DESTRUCTOR(link_netlink_destroy_callback, Link, link_unref);
 204
 205 int link_get_by_index(Manager *m, int ifindex, Link **ret);
 206 int link_get_by_name(Manager *m, const char *ifname, Link **ret);
 207 int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret);
 208 int link_get_master(Link *link, Link **ret);
 209
 210 int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg);
 211 int link_call_getlink(Link *link, link_netlink_message_handler_t callback);
 212 int link_handle_bound_to_list(Link *link);
 213
 214 void link_enter_failed(Link *link);
 215 void link_set_state(Link *link, LinkState state);
 216 void link_check_ready(Link *link);
 217
 218 void link_update_operstate(Link *link, bool also_update_bond_master);
 219
 220 static inline bool link_has_carrier(Link *link) {
 221         assert(link);
 222         return netif_has_carrier(link->kernel_operstate, link->flags);
 223 }
 224
 225 bool link_ipv6_enabled(Link *link);
 226 int link_ipv6ll_gained(Link *link);
 227
 228 bool link_ipv4ll_enabled(Link *link);
 229
 230 int link_stop_engines(Link *link, bool may_keep_dhcp);
 231
 232 const char* link_state_to_string(LinkState s) _const_;
 233 LinkState link_state_from_string(const char *s) _pure_;
 234
 235 int link_reconfigure(Link *link, bool force);
 236 int link_reconfigure_after_sleep(Link *link);
 237
 238 int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action);
 239 int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *m);
 240
 241 int link_flags_to_string_alloc(uint32_t flags, char **ret);
 242 const char *kernel_operstate_to_string(int t) _const_;