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 *kind;
  52         unsigned short iftype;
  53         char *state_file;
  54         struct ether_addr mac;
  55         struct in6_addr ipv6ll_address;
  56         uint32_t mtu;
  57         sd_device *sd_device;
  58
  59         /* wlan */
  60         enum nl80211_iftype wlan_iftype;
  61         char *ssid;
  62         struct ether_addr bssid;
  63
  64         unsigned flags;
  65         uint8_t kernel_operstate;
  66
  67         Network *network;
  68
  69         LinkState state;
  70         LinkOperationalState operstate;
  71         LinkCarrierState carrier_state;
  72         LinkAddressState address_state;
  73
  74         unsigned address_messages;
  75         unsigned address_label_messages;
  76         unsigned neighbor_messages;
  77         unsigned route_messages;
  78         unsigned nexthop_messages;
  79         unsigned routing_policy_rule_messages;
  80         unsigned routing_policy_rule_remove_messages;
  81         unsigned qdisc_messages;
  82         unsigned enslaving;
  83
  84         Set *addresses;
  85         Set *addresses_foreign;
  86         Set *neighbors;
  87         Set *neighbors_foreign;
  88         Set *routes;
  89         Set *routes_foreign;
  90         Set *nexthops;
  91         Set *nexthops_foreign;
  92
  93         sd_dhcp_client *dhcp_client;
  94         sd_dhcp_lease *dhcp_lease, *dhcp_lease_old;
  95         Set *dhcp_routes;
  96         char *lease_file;
  97         uint32_t original_mtu;
  98         unsigned dhcp4_messages;
  99         bool dhcp4_route_failed:1;
 100         bool dhcp4_route_retrying:1;
 101         bool dhcp4_configured:1;
 102         bool dhcp6_configured:1;
 103
 104         unsigned ndisc_messages;
 105         bool ndisc_configured;
 106
 107         sd_ipv4ll *ipv4ll;
 108         bool ipv4ll_address:1;
 109
 110         bool addresses_configured:1;
 111         bool addresses_ready:1;
 112         bool neighbors_configured:1;
 113         bool static_routes_configured:1;
 114         bool static_routes_ready:1;
 115         bool static_nexthops_configured:1;
 116         bool routing_policy_rules_configured:1;
 117         bool qdiscs_configured:1;
 118         bool setting_mtu:1;
 119
 120         LIST_HEAD(Address, pool_addresses);
 121
 122         sd_dhcp_server *dhcp_server;
 123
 124         sd_ndisc *ndisc;
 125         Set *ndisc_rdnss;
 126         Set *ndisc_dnssl;
 127
 128         sd_radv *radv;
 129
 130         sd_dhcp6_client *dhcp6_client;
 131
 132         /* This is about LLDP reception */
 133         sd_lldp *lldp;
 134         char *lldp_file;
 135
 136         /* This is about LLDP transmission */
 137         unsigned lldp_tx_fast; /* The LLDP txFast counter (See 802.1ab-2009, section 9.2.5.18) */
 138         sd_event_source *lldp_emit_event_source;
 139
 140         Hashmap *bound_by_links;
 141         Hashmap *bound_to_links;
 142         Set *slaves;
 143
 144         /* For speed meter */
 145         struct rtnl_link_stats64 stats_old, stats_new;
 146         bool stats_updated;
 147
 148         /* All kinds of DNS configuration */
 149         struct in_addr_data *dns;
 150         unsigned n_dns;
 151         OrderedSet *search_domains, *route_domains;
 152
 153         int dns_default_route;
 154         ResolveSupport llmnr;
 155         ResolveSupport mdns;
 156         DnssecMode dnssec_mode;
 157         DnsOverTlsMode dns_over_tls_mode;
 158         Set *dnssec_negative_trust_anchors;
 159
 160         char **ntp;
 161 } Link;
 162
 163 typedef int (*link_netlink_message_handler_t)(sd_netlink*, sd_netlink_message*, Link*);
 164
 165 DUID *link_get_duid(Link *link);
 166 int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error);
 167
 168 void link_ntp_settings_clear(Link *link);
 169 void link_dns_settings_clear(Link *link);
 170 Link *link_unref(Link *link);
 171 Link *link_ref(Link *link);
 172 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
 173 DEFINE_TRIVIAL_DESTRUCTOR(link_netlink_destroy_callback, Link, link_unref);
 174
 175 int link_get(Manager *m, int ifindex, Link **ret);
 176 int link_add(Manager *manager, sd_netlink_message *message, Link **ret);
 177 void link_drop(Link *link);
 178
 179 int link_down(Link *link, link_netlink_message_handler_t callback);
 180
 181 void link_enter_failed(Link *link);
 182 int link_initialized(Link *link, sd_device *device);
 183
 184 void link_set_state(Link *link, LinkState state);
 185 void link_check_ready(Link *link);
 186
 187 void link_update_operstate(Link *link, bool also_update_bond_master);
 188 int link_update(Link *link, sd_netlink_message *message);
 189
 190 void link_dirty(Link *link);
 191 void link_clean(Link *link);
 192 int link_save(Link *link);
 193
 194 int link_carrier_reset(Link *link);
 195 bool link_has_carrier(Link *link);
 196
 197 int link_ipv6ll_gained(Link *link, const struct in6_addr *address);
 198
 199 int link_set_mtu(Link *link, uint32_t mtu);
 200
 201 bool link_ipv4ll_enabled(Link *link, AddressFamily mask);
 202
 203 int link_stop_clients(Link *link, bool may_keep_dhcp);
 204
 205 const char* link_state_to_string(LinkState s) _const_;
 206 LinkState link_state_from_string(const char *s) _pure_;
 207
 208 uint32_t link_get_vrf_table(Link *link);
 209 uint32_t link_get_dhcp_route_table(Link *link);
 210 uint32_t link_get_ipv6_accept_ra_route_table(Link *link);
 211 int link_request_set_routes(Link *link);
 212 int link_request_set_nexthop(Link *link);
 213
 214 int link_reconfigure(Link *link, bool force);
 215
 216 #define ADDRESS_FMT_VAL(address)                   \
 217         be32toh((address).s_addr) >> 24,           \
 218         (be32toh((address).s_addr) >> 16) & 0xFFu, \
 219         (be32toh((address).s_addr) >> 8) & 0xFFu,  \
 220         be32toh((address).s_addr) & 0xFFu