src/network/networkd-link.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 #pragma once
   4
   5 /***
   6   This file is part of systemd.
   7
   8   Copyright 2013 Tom Gundersen <teg@jklm.no>
   9
  10   systemd is free software; you can redistribute it and/or modify it
  11   under the terms of the GNU Lesser General Public License as published by
  12   the Free Software Foundation; either version 2.1 of the License, or
  13   (at your option) any later version.
  14
  15   systemd is distributed in the hope that it will be useful, but
  16   WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18   Lesser General Public License for more details.
  19
  20   You should have received a copy of the GNU Lesser General Public License
  21   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  22 ***/
  23
  24 #include <endian.h>
  25
  26 #include "sd-dhcp-client.h"
  27 #include "sd-dhcp-server.h"
  28 #include "sd-dhcp6-client.h"
  29 #include "sd-ipv4ll.h"
  30 #include "sd-lldp.h"
  31 #include "sd-ndisc.h"
  32
  33 typedef struct Link Link;
  34
  35 typedef enum LinkState {
  36         LINK_STATE_PENDING,
  37         LINK_STATE_ENSLAVING,
  38         LINK_STATE_SETTING_ADDRESSES,
  39         LINK_STATE_SETTING_ROUTES,
  40         LINK_STATE_CONFIGURED,
  41         LINK_STATE_UNMANAGED,
  42         LINK_STATE_FAILED,
  43         LINK_STATE_LINGER,
  44         _LINK_STATE_MAX,
  45         _LINK_STATE_INVALID = -1
  46 } LinkState;
  47
  48 typedef enum LinkOperationalState {
  49         LINK_OPERSTATE_OFF,
  50         LINK_OPERSTATE_NO_CARRIER,
  51         LINK_OPERSTATE_DORMANT,
  52         LINK_OPERSTATE_CARRIER,
  53         LINK_OPERSTATE_DEGRADED,
  54         LINK_OPERSTATE_ROUTABLE,
  55         _LINK_OPERSTATE_MAX,
  56         _LINK_OPERSTATE_INVALID = -1
  57 } LinkOperationalState;
  58
  59 #include "networkd-address.h"
  60 #include "networkd-network.h"
  61 #include "networkd.h"
  62
  63 struct Link {
  64         Manager *manager;
  65
  66         int n_ref;
  67
  68         int ifindex;
  69         char *ifname;
  70         char *state_file;
  71         struct ether_addr mac;
  72         struct in6_addr ipv6ll_address;
  73         uint32_t mtu;
  74         struct udev_device *udev_device;
  75
  76         unsigned flags;
  77         uint8_t kernel_operstate;
  78
  79         Network *network;
  80
  81         LinkState state;
  82         LinkOperationalState operstate;
  83
  84         unsigned link_messages;
  85         unsigned enslaving;
  86
  87         Set *addresses;
  88         Set *addresses_foreign;
  89         Set *routes;
  90         Set *routes_foreign;
  91
  92         sd_dhcp_client *dhcp_client;
  93         sd_dhcp_lease *dhcp_lease;
  94         char *lease_file;
  95         uint16_t original_mtu;
  96         unsigned dhcp4_messages;
  97         bool dhcp4_configured;
  98         bool dhcp6_configured;
  99         unsigned ndisc_messages;
 100         bool ndisc_configured;
 101
 102         sd_ipv4ll *ipv4ll;
 103         bool ipv4ll_address:1;
 104         bool ipv4ll_route:1;
 105
 106         bool static_configured;
 107
 108         LIST_HEAD(Address, pool_addresses);
 109
 110         sd_dhcp_server *dhcp_server;
 111
 112         sd_ndisc *ndisc_router_discovery;
 113         sd_dhcp6_client *dhcp6_client;
 114         bool rtnl_extended_attrs;
 115
 116         sd_lldp *lldp;
 117         char *lldp_file;
 118
 119         Hashmap *bound_by_links;
 120         Hashmap *bound_to_links;
 121 };
 122
 123 Link *link_unref(Link *link);
 124 Link *link_ref(Link *link);
 125 int link_get(Manager *m, int ifindex, Link **ret);
 126 int link_add(Manager *manager, sd_netlink_message *message, Link **ret);
 127 void link_drop(Link *link);
 128
 129 int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata);
 130 int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata);
 131
 132 void link_enter_failed(Link *link);
 133 int link_initialized(Link *link, struct udev_device *device);
 134
 135 void link_check_ready(Link *link);
 136
 137 void link_update_operstate(Link *link);
 138 int link_update(Link *link, sd_netlink_message *message);
 139
 140 void link_dirty(Link *link);
 141 void link_clean(Link *link);
 142 int link_save(Link *link);
 143
 144 int link_carrier_reset(Link *link);
 145 bool link_has_carrier(Link *link);
 146
 147 int link_ipv6ll_gained(Link *link, const struct in6_addr *address);
 148
 149 int link_set_mtu(Link *link, uint32_t mtu);
 150 int link_set_hostname(Link *link, const char *hostname);
 151 int link_set_timezone(Link *link, const char *timezone);
 152
 153 int ipv4ll_configure(Link *link);
 154 int dhcp4_configure(Link *link);
 155 int dhcp6_configure(Link *link);
 156 int dhcp6_request_address(Link *link);
 157 int ndisc_configure(Link *link);
 158
 159 bool link_lldp_enabled(Link *link);
 160 bool link_ipv4ll_enabled(Link *link);
 161 bool link_ipv6ll_enabled(Link *link);
 162 bool link_dhcp4_server_enabled(Link *link);
 163 bool link_dhcp4_enabled(Link *link);
 164 bool link_dhcp6_enabled(Link *link);
 165 bool link_ipv6_accept_ra_enabled(Link *link);
 166
 167 const char* link_state_to_string(LinkState s) _const_;
 168 LinkState link_state_from_string(const char *s) _pure_;
 169
 170 const char* link_operstate_to_string(LinkOperationalState s) _const_;
 171 LinkOperationalState link_operstate_from_string(const char *s) _pure_;
 172
 173 extern const sd_bus_vtable link_vtable[];
 174
 175 int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error);
 176 int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error);
 177 int link_send_changed(Link *link, const char *property, ...) _sentinel_;
 178
 179 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
 180 #define _cleanup_link_unref_ _cleanup_(link_unrefp)
 181
 182 /* Macros which append INTERFACE= to the message */
 183
 184 #define log_link_full(link, level, error, ...)                          \
 185         ({                                                              \
 186                 Link *_l = (link);                                      \
 187                 _l ? log_object_internal(level, error, __FILE__, __LINE__, __func__, "INTERFACE=", _l->ifname, ##__VA_ARGS__) : \
 188                         log_internal(level, error, __FILE__, __LINE__, __func__, ##__VA_ARGS__); \
 189         })                                                              \
 190
 191 #define log_link_debug(link, ...)   log_link_full(link, LOG_DEBUG, 0, ##__VA_ARGS__)
 192 #define log_link_info(link, ...)    log_link_full(link, LOG_INFO, 0, ##__VA_ARGS__)
 193 #define log_link_notice(link, ...)  log_link_full(link, LOG_NOTICE, 0, ##__VA_ARGS__)
 194 #define log_link_warning(link, ...) log_link_full(link, LOG_WARNING, 0, ##__VA_ARGS__)
 195 #define log_link_error(link, ...)   log_link_full(link, LOG_ERR, 0, ##__VA_ARGS__)
 196
 197 #define log_link_debug_errno(link, error, ...)   log_link_full(link, LOG_DEBUG, error, ##__VA_ARGS__)
 198 #define log_link_info_errno(link, error, ...)    log_link_full(link, LOG_INFO, error, ##__VA_ARGS__)
 199 #define log_link_notice_errno(link, error, ...)  log_link_full(link, LOG_NOTICE, error, ##__VA_ARGS__)
 200 #define log_link_warning_errno(link, error, ...) log_link_full(link, LOG_WARNING, error, ##__VA_ARGS__)
 201 #define log_link_error_errno(link, error, ...)   log_link_full(link, LOG_ERR, error, ##__VA_ARGS__)
 202
 203 #define LOG_LINK_MESSAGE(link, fmt, ...) "MESSAGE=%s: " fmt, (link)->ifname, ##__VA_ARGS__
 204 #define LOG_LINK_INTERFACE(link) "INTERFACE=%s", (link)->ifname
 205
 206 #define ADDRESS_FMT_VAL(address)                   \
 207         be32toh((address).s_addr) >> 24,           \
 208         (be32toh((address).s_addr) >> 16) & 0xFFu, \
 209         (be32toh((address).s_addr) >> 8) & 0xFFu,  \
 210         be32toh((address).s_addr) & 0xFFu