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.h"
  60 #include "networkd-network.h"
  61 #include "networkd-address.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         uint32_t mtu;
  73         struct udev_device *udev_device;
  74
  75         unsigned flags;
  76         uint8_t kernel_operstate;
  77
  78         Network *network;
  79
  80         LinkState state;
  81         LinkOperationalState operstate;
  82
  83         unsigned link_messages;
  84         unsigned enslaving;
  85
  86         Set *addresses;
  87         Set *addresses_foreign;
  88
  89         sd_dhcp_client *dhcp_client;
  90         sd_dhcp_lease *dhcp_lease;
  91         char *lease_file;
  92         uint16_t original_mtu;
  93         unsigned dhcp4_messages;
  94         bool dhcp4_configured;
  95         bool dhcp6_configured;
  96
  97         sd_ipv4ll *ipv4ll;
  98         bool ipv4ll_address;
  99         bool ipv4ll_route;
 100
 101         bool static_configured;
 102
 103         LIST_HEAD(Address, pool_addresses);
 104
 105         sd_dhcp_server *dhcp_server;
 106
 107         sd_ndisc *ndisc_router_discovery;
 108         sd_dhcp6_client *dhcp6_client;
 109         bool rtnl_extended_attrs;
 110
 111         sd_lldp *lldp;
 112         char *lldp_file;
 113
 114         Hashmap *bound_by_links;
 115         Hashmap *bound_to_links;
 116 };
 117
 118 Link *link_unref(Link *link);
 119 Link *link_ref(Link *link);
 120 int link_get(Manager *m, int ifindex, Link **ret);
 121 int link_add(Manager *manager, sd_netlink_message *message, Link **ret);
 122 void link_drop(Link *link);
 123
 124 int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata);
 125 int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata);
 126
 127 void link_enter_failed(Link *link);
 128 int link_initialized(Link *link, struct udev_device *device);
 129
 130 void link_check_ready(Link *link);
 131
 132 void link_update_operstate(Link *link);
 133 int link_update(Link *link, sd_netlink_message *message);
 134
 135 void link_dirty(Link *link);
 136 void link_clean(Link *link);
 137 int link_save(Link *link);
 138
 139 int link_carrier_reset(Link *link);
 140 bool link_has_carrier(Link *link);
 141
 142 int link_set_mtu(Link *link, uint32_t mtu);
 143 int link_set_hostname(Link *link, const char *hostname);
 144 int link_set_timezone(Link *link, const char *timezone);
 145
 146 int ipv4ll_configure(Link *link);
 147 int dhcp4_configure(Link *link);
 148 int dhcp6_configure(Link *link, bool information_request);
 149 int ndisc_configure(Link *link);
 150
 151 bool link_lldp_enabled(Link *link);
 152 bool link_ipv4ll_enabled(Link *link);
 153 bool link_ipv6ll_enabled(Link *link);
 154 bool link_dhcp4_server_enabled(Link *link);
 155 bool link_dhcp4_enabled(Link *link);
 156 bool link_dhcp6_enabled(Link *link);
 157
 158 const char* link_state_to_string(LinkState s) _const_;
 159 LinkState link_state_from_string(const char *s) _pure_;
 160
 161 const char* link_operstate_to_string(LinkOperationalState s) _const_;
 162 LinkOperationalState link_operstate_from_string(const char *s) _pure_;
 163
 164 extern const sd_bus_vtable link_vtable[];
 165
 166 int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error);
 167 int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error);
 168 int link_send_changed(Link *link, const char *property, ...) _sentinel_;
 169
 170 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
 171 #define _cleanup_link_unref_ _cleanup_(link_unrefp)
 172
 173 /* Macros which append INTERFACE= to the message */
 174
 175 #define log_link_full(link, level, error, ...)                          \
 176         ({                                                              \
 177                 Link *_l = (link);                                      \
 178                 _l ? log_object_internal(level, error, __FILE__, __LINE__, __func__, "INTERFACE=", _l->ifname, ##__VA_ARGS__) : \
 179                         log_internal(level, error, __FILE__, __LINE__, __func__, ##__VA_ARGS__); \
 180         })                                                              \
 181
 182 #define log_link_debug(link, ...)   log_link_full(link, LOG_DEBUG, 0, ##__VA_ARGS__)
 183 #define log_link_info(link, ...)    log_link_full(link, LOG_INFO, 0, ##__VA_ARGS__)
 184 #define log_link_notice(link, ...)  log_link_full(link, LOG_NOTICE, 0, ##__VA_ARGS__)
 185 #define log_link_warning(link, ...) log_link_full(link, LOG_WARNING, 0, ##__VA_ARGS__)
 186 #define log_link_error(link, ...)   log_link_full(link, LOG_ERR, 0, ##__VA_ARGS__)
 187
 188 #define log_link_debug_errno(link, error, ...)   log_link_full(link, LOG_DEBUG, error, ##__VA_ARGS__)
 189 #define log_link_info_errno(link, error, ...)    log_link_full(link, LOG_INFO, error, ##__VA_ARGS__)
 190 #define log_link_notice_errno(link, error, ...)  log_link_full(link, LOG_NOTICE, error, ##__VA_ARGS__)
 191 #define log_link_warning_errno(link, error, ...) log_link_full(link, LOG_WARNING, error, ##__VA_ARGS__)
 192 #define log_link_error_errno(link, error, ...)   log_link_full(link, LOG_ERR, error, ##__VA_ARGS__)
 193
 194 #define LOG_LINK_MESSAGE(link, fmt, ...) "MESSAGE=%s: " fmt, (link)->ifname, ##__VA_ARGS__
 195 #define LOG_LINK_INTERFACE(link) "INTERFACE=%s", (link)->ifname
 196
 197 #define ADDRESS_FMT_VAL(address)                   \
 198         be32toh((address).s_addr) >> 24,           \
 199         (be32toh((address).s_addr) >> 16) & 0xFFu, \
 200         (be32toh((address).s_addr) >> 8) & 0xFFu,  \
 201         be32toh((address).s_addr) & 0xFFu