src/network/networkd-link.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 #include <endian.h>
   5
   6 #include "sd-bus.h"
   7 #include "sd-device.h"
   8 #include "sd-dhcp-client.h"
   9 #include "sd-dhcp-server.h"
  10 #include "sd-dhcp6-client.h"
  11 #include "sd-ipv4ll.h"
  12 #include "sd-lldp.h"
  13 #include "sd-ndisc.h"
  14 #include "sd-radv.h"
  15 #include "sd-netlink.h"
  16
  17 #include "list.h"
  18 #include "log-link.h"
  19 #include "network-util.h"
  20 #include "networkd-util.h"
  21 #include "set.h"
  22
  23 typedef enum LinkState {
  24         LINK_STATE_PENDING,     /* udev has not initialized the link */
  25         LINK_STATE_INITIALIZED, /* udev has initialized the link */
  26         LINK_STATE_CONFIGURING, /* configuring addresses, routes, etc. */
  27         LINK_STATE_CONFIGURED,  /* everything is configured */
  28         LINK_STATE_UNMANAGED,   /* Unmanaged=yes is set */
  29         LINK_STATE_FAILED,      /* at least one configuration process failed */
  30         LINK_STATE_LINGER,      /* RTM_DELLINK for the link has been received */
  31         _LINK_STATE_MAX,
  32         _LINK_STATE_INVALID = -1
  33 } LinkState;
  34
  35 typedef struct Manager Manager;
  36 typedef struct Network Network;
  37 typedef struct Address Address;
  38 typedef struct DUID DUID;
  39
  40 typedef struct Link {
  41         Manager *manager;
  42
  43         unsigned n_ref;
  44
  45         int ifindex;
  46         int master_ifindex;
  47         char *ifname;
  48         char *kind;
  49         unsigned short iftype;
  50         char *state_file;
  51         struct ether_addr mac;
  52         struct in6_addr ipv6ll_address;
  53         uint32_t mtu;
  54         sd_device *sd_device;
  55
  56         unsigned flags;
  57         uint8_t kernel_operstate;
  58
  59         Network *network;
  60
  61         LinkState state;
  62         LinkOperationalState operstate;
  63         LinkCarrierState carrier_state;
  64         LinkAddressState address_state;
  65
  66         unsigned address_messages;
  67         unsigned address_label_messages;
  68         unsigned neighbor_messages;
  69         unsigned route_messages;
  70         unsigned routing_policy_rule_messages;
  71         unsigned routing_policy_rule_remove_messages;
  72         unsigned enslaving;
  73
  74         Set *addresses;
  75         Set *addresses_foreign;
  76         Set *routes;
  77         Set *routes_foreign;
  78
  79         bool addresses_configured;
  80         bool addresses_ready;
  81
  82         sd_dhcp_client *dhcp_client;
  83         sd_dhcp_lease *dhcp_lease, *dhcp_lease_old;
  84         char *lease_file;
  85         uint32_t original_mtu;
  86         unsigned dhcp4_messages;
  87         bool dhcp4_configured;
  88         bool dhcp6_configured;
  89
  90         unsigned ndisc_messages;
  91         bool ndisc_configured;
  92
  93         sd_ipv4ll *ipv4ll;
  94         bool ipv4ll_address:1;
  95         bool ipv4ll_route:1;
  96
  97         bool neighbors_configured;
  98
  99         bool static_routes_configured;
 100         bool routing_policy_rules_configured;
 101         bool setting_mtu;
 102
 103         LIST_HEAD(Address, pool_addresses);
 104
 105         sd_dhcp_server *dhcp_server;
 106
 107         sd_ndisc *ndisc;
 108         Set *ndisc_rdnss;
 109         Set *ndisc_dnssl;
 110
 111         sd_radv *radv;
 112
 113         sd_dhcp6_client *dhcp6_client;
 114         bool rtnl_extended_attrs;
 115
 116         /* This is about LLDP reception */
 117         sd_lldp *lldp;
 118         char *lldp_file;
 119
 120         /* This is about LLDP transmission */
 121         unsigned lldp_tx_fast; /* The LLDP txFast counter (See 802.1ab-2009, section 9.2.5.18) */
 122         sd_event_source *lldp_emit_event_source;
 123
 124         Hashmap *bound_by_links;
 125         Hashmap *bound_to_links;
 126         Set *slaves;
 127
 128         /* For speed meter */
 129         struct rtnl_link_stats64 stats_old, stats_new;
 130         bool stats_updated;
 131
 132         int sysctl_ipv6_enabled;
 133 } Link;
 134
 135 typedef int (*link_netlink_message_handler_t)(sd_netlink*, sd_netlink_message*, Link*);
 136
 137 DUID *link_get_duid(Link *link);
 138 int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error);
 139
 140 Link *link_unref(Link *link);
 141 Link *link_ref(Link *link);
 142 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
 143 DEFINE_TRIVIAL_DESTRUCTOR(link_netlink_destroy_callback, Link, link_unref);
 144
 145 int link_get(Manager *m, int ifindex, Link **ret);
 146 int link_add(Manager *manager, sd_netlink_message *message, Link **ret);
 147 void link_drop(Link *link);
 148
 149 int link_down(Link *link, link_netlink_message_handler_t callback);
 150
 151 void link_enter_failed(Link *link);
 152 int link_initialized(Link *link, sd_device *device);
 153
 154 void link_set_state(Link *link, LinkState state);
 155 void link_check_ready(Link *link);
 156
 157 void link_update_operstate(Link *link, bool also_update_bond_master);
 158 int link_update(Link *link, sd_netlink_message *message);
 159
 160 void link_dirty(Link *link);
 161 void link_clean(Link *link);
 162 int link_save(Link *link);
 163
 164 int link_carrier_reset(Link *link);
 165 bool link_has_carrier(Link *link);
 166
 167 int link_ipv6ll_gained(Link *link, const struct in6_addr *address);
 168
 169 int link_set_mtu(Link *link, uint32_t mtu);
 170
 171 int ipv4ll_configure(Link *link);
 172 bool link_ipv4ll_enabled(Link *link, AddressFamilyBoolean mask);
 173
 174 void dhcp4_release_old_lease(Link *link);
 175 int dhcp4_configure(Link *link);
 176 int dhcp4_set_client_identifier(Link *link);
 177 int dhcp4_set_promote_secondaries(Link *link);
 178 int dhcp6_request_prefix_delegation(Link *link);
 179 int dhcp6_configure(Link *link);
 180 int dhcp6_request_address(Link *link, int ir);
 181 int dhcp6_lease_pd_prefix_lost(sd_dhcp6_client *client, Link* link);
 182
 183 int link_stop_clients(Link *link, bool may_keep_dhcp);
 184
 185 const char* link_state_to_string(LinkState s) _const_;
 186 LinkState link_state_from_string(const char *s) _pure_;
 187
 188 uint32_t link_get_vrf_table(Link *link);
 189 uint32_t link_get_dhcp_route_table(Link *link);
 190 uint32_t link_get_ipv6_accept_ra_route_table(Link *link);
 191 int link_request_set_routes(Link *link);
 192
 193 int link_sysctl_ipv6_enabled(Link *link);
 194
 195 #define ADDRESS_FMT_VAL(address)                   \
 196         be32toh((address).s_addr) >> 24,           \
 197         (be32toh((address).s_addr) >> 16) & 0xFFu, \
 198         (be32toh((address).s_addr) >> 8) & 0xFFu,  \
 199         be32toh((address).s_addr) & 0xFFu