src/network/networkd-link.h

   1 #pragma once
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2013 Tom Gundersen <teg@jklm.no>
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <endian.h>
  23
  24 #include "sd-dhcp-client.h"
  25 #include "sd-dhcp-server.h"
  26 #include "sd-dhcp6-client.h"
  27 #include "sd-ipv4ll.h"
  28 #include "sd-lldp.h"
  29 #include "sd-ndisc.h"
  30
  31 typedef struct Link Link;
  32
  33 typedef enum LinkState {
  34         LINK_STATE_PENDING,
  35         LINK_STATE_ENSLAVING,
  36         LINK_STATE_SETTING_ADDRESSES,
  37         LINK_STATE_SETTING_ROUTES,
  38         LINK_STATE_CONFIGURED,
  39         LINK_STATE_UNMANAGED,
  40         LINK_STATE_FAILED,
  41         LINK_STATE_LINGER,
  42         _LINK_STATE_MAX,
  43         _LINK_STATE_INVALID = -1
  44 } LinkState;
  45
  46 typedef enum LinkOperationalState {
  47         LINK_OPERSTATE_OFF,
  48         LINK_OPERSTATE_NO_CARRIER,
  49         LINK_OPERSTATE_DORMANT,
  50         LINK_OPERSTATE_CARRIER,
  51         LINK_OPERSTATE_DEGRADED,
  52         LINK_OPERSTATE_ROUTABLE,
  53         _LINK_OPERSTATE_MAX,
  54         _LINK_OPERSTATE_INVALID = -1
  55 } LinkOperationalState;
  56
  57 #include "networkd-address.h"
  58 #include "networkd-network.h"
  59 #include "networkd.h"
  60
  61 struct Link {
  62         Manager *manager;
  63
  64         int n_ref;
  65
  66         int ifindex;
  67         char *ifname;
  68         unsigned short iftype;
  69         char *state_file;
  70         struct ether_addr mac;
  71         struct in6_addr ipv6ll_address;
  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         Set *routes;
  89         Set *routes_foreign;
  90
  91         sd_dhcp_client *dhcp_client;
  92         sd_dhcp_lease *dhcp_lease;
  93         char *lease_file;
  94         uint16_t original_mtu;
  95         unsigned dhcp4_messages;
  96         bool dhcp4_configured;
  97         bool dhcp6_configured;
  98         unsigned ndisc_messages;
  99         bool ndisc_configured;
 100
 101         sd_ipv4ll *ipv4ll;
 102         bool ipv4ll_address:1;
 103         bool ipv4ll_route:1;
 104
 105         bool static_configured;
 106
 107         LIST_HEAD(Address, pool_addresses);
 108
 109         sd_dhcp_server *dhcp_server;
 110
 111         sd_ndisc *ndisc_router_discovery;
 112         sd_dhcp6_client *dhcp6_client;
 113         bool rtnl_extended_attrs;
 114
 115         /* This is about LLDP reception */
 116         sd_lldp *lldp;
 117         char *lldp_file;
 118
 119         /* This is about LLDP transmission */
 120         unsigned lldp_tx_fast; /* The LLDP txFast counter (See 802.1ab-2009, section 9.2.5.18) */
 121         sd_event_source *lldp_tx_event_source;
 122
 123         Hashmap *bound_by_links;
 124         Hashmap *bound_to_links;
 125 };
 126
 127 Link *link_unref(Link *link);
 128 Link *link_ref(Link *link);
 129 int link_get(Manager *m, int ifindex, Link **ret);
 130 int link_add(Manager *manager, sd_netlink_message *message, Link **ret);
 131 void link_drop(Link *link);
 132
 133 int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata);
 134 int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata);
 135
 136 void link_enter_failed(Link *link);
 137 int link_initialized(Link *link, struct udev_device *device);
 138
 139 void link_check_ready(Link *link);
 140
 141 void link_update_operstate(Link *link);
 142 int link_update(Link *link, sd_netlink_message *message);
 143
 144 void link_dirty(Link *link);
 145 void link_clean(Link *link);
 146 int link_save(Link *link);
 147
 148 int link_carrier_reset(Link *link);
 149 bool link_has_carrier(Link *link);
 150
 151 int link_ipv6ll_gained(Link *link, const struct in6_addr *address);
 152
 153 int link_set_mtu(Link *link, uint32_t mtu);
 154 int link_set_hostname(Link *link, const char *hostname);
 155 int link_set_timezone(Link *link, const char *timezone);
 156
 157 int ipv4ll_configure(Link *link);
 158 int dhcp4_configure(Link *link);
 159 int dhcp6_configure(Link *link);
 160 int dhcp6_request_address(Link *link);
 161 int ndisc_configure(Link *link);
 162
 163 const char* link_state_to_string(LinkState s) _const_;
 164 LinkState link_state_from_string(const char *s) _pure_;
 165
 166 const char* link_operstate_to_string(LinkOperationalState s) _const_;
 167 LinkOperationalState link_operstate_from_string(const char *s) _pure_;
 168
 169 extern const sd_bus_vtable link_vtable[];
 170
 171 int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error);
 172 int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error);
 173 int link_send_changed(Link *link, const char *property, ...) _sentinel_;
 174
 175 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
 176 #define _cleanup_link_unref_ _cleanup_(link_unrefp)
 177
 178 /* Macros which append INTERFACE= to the message */
 179
 180 #define log_link_full(link, level, error, ...)                          \
 181         ({                                                              \
 182                 Link *_l = (link);                                      \
 183                 _l ? log_object_internal(level, error, __FILE__, __LINE__, __func__, "INTERFACE=", _l->ifname, ##__VA_ARGS__) : \
 184                         log_internal(level, error, __FILE__, __LINE__, __func__, ##__VA_ARGS__); \
 185         })                                                              \
 186
 187 #define log_link_debug(link, ...)   log_link_full(link, LOG_DEBUG, 0, ##__VA_ARGS__)
 188 #define log_link_info(link, ...)    log_link_full(link, LOG_INFO, 0, ##__VA_ARGS__)
 189 #define log_link_notice(link, ...)  log_link_full(link, LOG_NOTICE, 0, ##__VA_ARGS__)
 190 #define log_link_warning(link, ...) log_link_full(link, LOG_WARNING, 0, ##__VA_ARGS__)
 191 #define log_link_error(link, ...)   log_link_full(link, LOG_ERR, 0, ##__VA_ARGS__)
 192
 193 #define log_link_debug_errno(link, error, ...)   log_link_full(link, LOG_DEBUG, error, ##__VA_ARGS__)
 194 #define log_link_info_errno(link, error, ...)    log_link_full(link, LOG_INFO, error, ##__VA_ARGS__)
 195 #define log_link_notice_errno(link, error, ...)  log_link_full(link, LOG_NOTICE, error, ##__VA_ARGS__)
 196 #define log_link_warning_errno(link, error, ...) log_link_full(link, LOG_WARNING, error, ##__VA_ARGS__)
 197 #define log_link_error_errno(link, error, ...)   log_link_full(link, LOG_ERR, error, ##__VA_ARGS__)
 198
 199 #define LOG_LINK_MESSAGE(link, fmt, ...) "MESSAGE=%s: " fmt, (link)->ifname, ##__VA_ARGS__
 200 #define LOG_LINK_INTERFACE(link) "INTERFACE=%s", (link)->ifname
 201
 202 #define ADDRESS_FMT_VAL(address)                   \
 203         be32toh((address).s_addr) >> 24,           \
 204         (be32toh((address).s_addr) >> 16) & 0xFFu, \
 205         (be32toh((address).s_addr) >> 8) & 0xFFu,  \
 206         be32toh((address).s_addr) & 0xFFu