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-ipv4ll.h"
  29 #include "sd-icmp6-nd.h"
  30 #include "sd-dhcp6-client.h"
  31 #include "sd-lldp.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         LIST_HEAD(Address, addresses);
  87
  88         sd_dhcp_client *dhcp_client;
  89         sd_dhcp_lease *dhcp_lease;
  90         char *lease_file;
  91         uint16_t original_mtu;
  92         unsigned dhcp4_messages;
  93         bool dhcp4_configured;
  94         bool dhcp6_configured;
  95
  96         sd_ipv4ll *ipv4ll;
  97         bool ipv4ll_address;
  98         bool ipv4ll_route;
  99
 100         bool static_configured;
 101
 102         LIST_HEAD(Address, pool_addresses);
 103
 104         sd_dhcp_server *dhcp_server;
 105
 106         sd_icmp6_nd *icmp6_router_discovery;
 107         sd_dhcp6_client *dhcp6_client;
 108         bool rtnl_extended_attrs;
 109
 110         sd_lldp *lldp;
 111         char *lldp_file;
 112
 113         Hashmap *bound_by_links;
 114         Hashmap *bound_to_links;
 115 };
 116
 117 Link *link_unref(Link *link);
 118 Link *link_ref(Link *link);
 119 int link_get(Manager *m, int ifindex, Link **ret);
 120 int link_add(Manager *manager, sd_netlink_message *message, Link **ret);
 121 void link_drop(Link *link);
 122
 123 int link_address_drop_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata);
 124 int link_route_drop_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata);
 125
 126 void link_enter_failed(Link *link);
 127 int link_initialized(Link *link, struct udev_device *device);
 128
 129 void link_client_handler(Link *link);
 130
 131 int link_update(Link *link, sd_netlink_message *message);
 132 int link_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message, void *userdata);
 133
 134 int link_save(Link *link);
 135
 136 int link_carrier_reset(Link *link);
 137 bool link_has_carrier(Link *link);
 138
 139 int link_set_mtu(Link *link, uint32_t mtu);
 140 int link_set_hostname(Link *link, const char *hostname);
 141 int link_set_timezone(Link *link, const char *timezone);
 142
 143 int ipv4ll_configure(Link *link);
 144 int dhcp4_configure(Link *link);
 145 int icmp6_configure(Link *link);
 146
 147 bool link_lldp_enabled(Link *link);
 148 bool link_ipv4ll_enabled(Link *link);
 149 bool link_ipv6ll_enabled(Link *link);
 150 bool link_dhcp4_server_enabled(Link *link);
 151 bool link_dhcp4_enabled(Link *link);
 152 bool link_dhcp6_enabled(Link *link);
 153
 154 const char* link_state_to_string(LinkState s) _const_;
 155 LinkState link_state_from_string(const char *s) _pure_;
 156
 157 const char* link_operstate_to_string(LinkOperationalState s) _const_;
 158 LinkOperationalState link_operstate_from_string(const char *s) _pure_;
 159
 160 extern const sd_bus_vtable link_vtable[];
 161
 162 int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error);
 163 int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error);
 164 int link_send_changed(Link *link, const char *property, ...) _sentinel_;
 165
 166 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
 167 #define _cleanup_link_unref_ _cleanup_(link_unrefp)
 168
 169 /* Macros which append INTERFACE= to the message */
 170
 171 #define log_link_full(link, level, error, ...)                          \
 172         ({                                                              \
 173                 Link *_l = (link);                                      \
 174                 _l ? log_object_internal(level, error, __FILE__, __LINE__, __func__, "INTERFACE=", _l->ifname, ##__VA_ARGS__) : \
 175                         log_internal(level, error, __FILE__, __LINE__, __func__, ##__VA_ARGS__); \
 176         })                                                              \
 177
 178 #define log_link_debug(link, ...)   log_link_full(link, LOG_DEBUG, 0, ##__VA_ARGS__)
 179 #define log_link_info(link, ...)    log_link_full(link, LOG_INFO, 0, ##__VA_ARGS__)
 180 #define log_link_notice(link, ...)  log_link_full(link, LOG_NOTICE, 0, ##__VA_ARGS__)
 181 #define log_link_warning(link, ...) log_link_full(link, LOG_WARNING, 0, ##__VA_ARGS__)
 182 #define log_link_error(link, ...)   log_link_full(link, LOG_ERR, 0, ##__VA_ARGS__)
 183
 184 #define log_link_debug_errno(link, error, ...)   log_link_full(link, LOG_DEBUG, error, ##__VA_ARGS__)
 185 #define log_link_info_errno(link, error, ...)    log_link_full(link, LOG_INFO, error, ##__VA_ARGS__)
 186 #define log_link_notice_errno(link, error, ...)  log_link_full(link, LOG_NOTICE, error, ##__VA_ARGS__)
 187 #define log_link_warning_errno(link, error, ...) log_link_full(link, LOG_WARNING, error, ##__VA_ARGS__)
 188 #define log_link_error_errno(link, error, ...)   log_link_full(link, LOG_ERR, error, ##__VA_ARGS__)
 189
 190 #define LOG_LINK_MESSAGE(link, fmt, ...) "MESSAGE=%s: " fmt, (link)->ifname, ##__VA_ARGS__
 191 #define LOG_LINK_INTERFACE(link) "INTERFACE=%s", (link)->ifname
 192
 193 #define ADDRESS_FMT_VAL(address)                   \
 194         be32toh((address).s_addr) >> 24,           \
 195         (be32toh((address).s_addr) >> 16) & 0xFFu, \
 196         (be32toh((address).s_addr) >> 8) & 0xFFu,  \
 197         be32toh((address).s_addr) & 0xFFu