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
  61         /* wlan */
  62         enum nl80211_iftype wlan_iftype;
  63         char *ssid;
  64         struct ether_addr bssid;
  65
  66         unsigned flags;
  67         uint8_t kernel_operstate;
  68
  69         Network *network;
  70
  71         LinkState state;
  72         LinkOperationalState operstate;
  73         LinkCarrierState carrier_state;
  74         LinkAddressState address_state;
  75
  76         unsigned address_messages;
  77         unsigned address_label_messages;
  78         unsigned neighbor_messages;
  79         unsigned route_messages;
  80         unsigned nexthop_messages;
  81         unsigned routing_policy_rule_messages;
  82         unsigned routing_policy_rule_remove_messages;
  83         unsigned qdisc_messages;
  84         unsigned enslaving;
  85
  86         Set *addresses;
  87         Set *addresses_foreign;
  88         Set *neighbors;
  89         Set *neighbors_foreign;
  90         Set *routes;
  91         Set *routes_foreign;
  92         Set *nexthops;
  93         Set *nexthops_foreign;
  94
  95         sd_dhcp_client *dhcp_client;
  96         sd_dhcp_lease *dhcp_lease, *dhcp_lease_old;
  97         Set *dhcp_routes;
  98         char *lease_file;
  99         uint32_t original_mtu;
 100         unsigned dhcp4_messages;
 101         bool dhcp4_route_failed:1;
 102         bool dhcp4_route_retrying:1;
 103         bool dhcp4_configured:1;
 104         bool dhcp6_configured:1;
 105
 106         unsigned ndisc_messages;
 107         bool ndisc_configured;
 108
 109         sd_ipv4ll *ipv4ll;
 110         bool ipv4ll_address:1;
 111
 112         bool addresses_configured:1;
 113         bool addresses_ready:1;
 114         bool neighbors_configured:1;
 115         bool static_routes_configured:1;
 116         bool static_routes_ready:1;
 117         bool static_nexthops_configured:1;
 118         bool routing_policy_rules_configured:1;
 119         bool qdiscs_configured:1;
 120         bool setting_mtu:1;
 121         bool setting_genmode:1;
 122         bool ipv6_mtu_set:1;
 123
 124         LIST_HEAD(Address, pool_addresses);
 125
 126         sd_dhcp_server *dhcp_server;
 127
 128         sd_ndisc *ndisc;
 129         Set *ndisc_rdnss;
 130         Set *ndisc_dnssl;
 131
 132         sd_radv *radv;
 133
 134         sd_dhcp6_client *dhcp6_client;
 135
 136         /* This is about LLDP reception */
 137         sd_lldp *lldp;
 138         char *lldp_file;
 139
 140         /* This is about LLDP transmission */
 141         unsigned lldp_tx_fast; /* The LLDP txFast counter (See 802.1ab-2009, section 9.2.5.18) */
 142         sd_event_source *lldp_emit_event_source;
 143
 144         Hashmap *bound_by_links;
 145         Hashmap *bound_to_links;
 146         Set *slaves;
 147
 148         /* For speed meter */
 149         struct rtnl_link_stats64 stats_old, stats_new;
 150         bool stats_updated;
 151
 152         /* All kinds of DNS configuration */
 153         struct in_addr_data *dns;
 154         unsigned n_dns;
 155         OrderedSet *search_domains, *route_domains;
 156
 157         int dns_default_route;
 158         ResolveSupport llmnr;
 159         ResolveSupport mdns;
 160         DnssecMode dnssec_mode;
 161         DnsOverTlsMode dns_over_tls_mode;
 162         Set *dnssec_negative_trust_anchors;
 163
 164         char **ntp;
 165 } Link;
 166
 167 typedef int (*link_netlink_message_handler_t)(sd_netlink*, sd_netlink_message*, Link*);
 168
 169 DUID *link_get_duid(Link *link);
 170 int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error);
 171
 172 void link_ntp_settings_clear(Link *link);
 173 void link_dns_settings_clear(Link *link);
 174 Link *link_unref(Link *link);
 175 Link *link_ref(Link *link);
 176 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
 177 DEFINE_TRIVIAL_DESTRUCTOR(link_netlink_destroy_callback, Link, link_unref);
 178
 179 int link_get(Manager *m, int ifindex, Link **ret);
 180 int link_add(Manager *manager, sd_netlink_message *message, Link **ret);
 181 void link_drop(Link *link);
 182
 183 int link_down(Link *link, link_netlink_message_handler_t callback);
 184
 185 void link_enter_failed(Link *link);
 186 int link_initialized(Link *link, sd_device *device);
 187
 188 void link_set_state(Link *link, LinkState state);
 189 void link_check_ready(Link *link);
 190
 191 void link_update_operstate(Link *link, bool also_update_bond_master);
 192 int link_update(Link *link, sd_netlink_message *message);
 193
 194 void link_dirty(Link *link);
 195 void link_clean(Link *link);
 196 int link_save(Link *link);
 197
 198 int link_carrier_reset(Link *link);
 199 bool link_has_carrier(Link *link);
 200
 201 int link_ipv6ll_gained(Link *link, const struct in6_addr *address);
 202
 203 int link_set_mtu(Link *link, uint32_t mtu);
 204
 205 bool link_ipv4ll_enabled(Link *link, AddressFamily mask);
 206
 207 int link_stop_clients(Link *link, bool may_keep_dhcp);
 208
 209 const char* link_state_to_string(LinkState s) _const_;
 210 LinkState link_state_from_string(const char *s) _pure_;
 211
 212 uint32_t link_get_vrf_table(Link *link);
 213 uint32_t link_get_dhcp_route_table(Link *link);
 214 uint32_t link_get_ipv6_accept_ra_route_table(Link *link);
 215 int link_request_set_routes(Link *link);
 216 int link_request_set_nexthop(Link *link);
 217
 218 int link_reconfigure(Link *link, bool force);
 219
 220 int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg);
 221 #define log_link_message_error_errno(link, m, err, msg)   log_link_message_full_errno(link, m, LOG_ERR, err, msg)
 222 #define log_link_message_warning_errno(link, m, err, msg) log_link_message_full_errno(link, m, LOG_WARNING, err, msg)
 223 #define log_link_message_notice_errno(link, m, err, msg)  log_link_message_full_errno(link, m, LOG_NOTICE, err, msg)
 224 #define log_link_message_info_errno(link, m, err, msg)    log_link_message_full_errno(link, m, LOG_INFO, err, msg)
 225 #define log_link_message_debug_errno(link, m, err, msg)   log_link_message_full_errno(link, m, LOG_DEBUG, err, msg)
 226
 227 #define ADDRESS_FMT_VAL(address)                   \
 228         be32toh((address).s_addr) >> 24,           \
 229         (be32toh((address).s_addr) >> 16) & 0xFFu, \
 230         (be32toh((address).s_addr) >> 8) & 0xFFu,  \
 231         be32toh((address).s_addr) & 0xFFu