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-bus.h"
  25 #include "sd-dhcp-client.h"
  26 #include "sd-dhcp-server.h"
  27 #include "sd-dhcp6-client.h"
  28 #include "sd-ipv4ll.h"
  29 #include "sd-lldp.h"
  30 #include "sd-ndisc.h"
  31 #include "sd-netlink.h"
  32
  33 #include "list.h"
  34 #include "set.h"
  35
  36 typedef enum LinkState {
  37         LINK_STATE_PENDING,
  38         LINK_STATE_ENSLAVING,
  39         LINK_STATE_SETTING_ADDRESSES,
  40         LINK_STATE_SETTING_ROUTES,
  41         LINK_STATE_CONFIGURED,
  42         LINK_STATE_UNMANAGED,
  43         LINK_STATE_FAILED,
  44         LINK_STATE_LINGER,
  45         _LINK_STATE_MAX,
  46         _LINK_STATE_INVALID = -1
  47 } LinkState;
  48
  49 typedef enum LinkOperationalState {
  50         LINK_OPERSTATE_OFF,
  51         LINK_OPERSTATE_NO_CARRIER,
  52         LINK_OPERSTATE_DORMANT,
  53         LINK_OPERSTATE_CARRIER,
  54         LINK_OPERSTATE_DEGRADED,
  55         LINK_OPERSTATE_ROUTABLE,
  56         _LINK_OPERSTATE_MAX,
  57         _LINK_OPERSTATE_INVALID = -1
  58 } LinkOperationalState;
  59
  60 typedef struct Manager Manager;
  61 typedef struct Network Network;
  62 typedef struct Address Address;
  63
  64 typedef struct Link {
  65         Manager *manager;
  66
  67         int n_ref;
  68
  69         int ifindex;
  70         char *ifname;
  71         char *kind;
  72         unsigned short iftype;
  73         char *state_file;
  74         struct ether_addr mac;
  75         struct in6_addr ipv6ll_address;
  76         uint32_t mtu;
  77         struct udev_device *udev_device;
  78
  79         unsigned flags;
  80         uint8_t kernel_operstate;
  81
  82         Network *network;
  83
  84         LinkState state;
  85         LinkOperationalState operstate;
  86
  87         unsigned link_messages;
  88         unsigned enslaving;
  89
  90         Set *addresses;
  91         Set *addresses_foreign;
  92         Set *routes;
  93         Set *routes_foreign;
  94
  95         sd_dhcp_client *dhcp_client;
  96         sd_dhcp_lease *dhcp_lease;
  97         char *lease_file;
  98         uint16_t original_mtu;
  99         unsigned dhcp4_messages;
 100         bool dhcp4_configured;
 101         bool dhcp6_configured;
 102
 103         unsigned ndisc_messages;
 104         bool ndisc_configured;
 105
 106         sd_ipv4ll *ipv4ll;
 107         bool ipv4ll_address:1;
 108         bool ipv4ll_route:1;
 109
 110         bool static_configured;
 111
 112         LIST_HEAD(Address, pool_addresses);
 113
 114         sd_dhcp_server *dhcp_server;
 115
 116         sd_ndisc *ndisc;
 117         Set *ndisc_rdnss;
 118         Set *ndisc_dnssl;
 119
 120         sd_dhcp6_client *dhcp6_client;
 121         bool rtnl_extended_attrs;
 122
 123         /* This is about LLDP reception */
 124         sd_lldp *lldp;
 125         char *lldp_file;
 126
 127         /* This is about LLDP transmission */
 128         unsigned lldp_tx_fast; /* The LLDP txFast counter (See 802.1ab-2009, section 9.2.5.18) */
 129         sd_event_source *lldp_emit_event_source;
 130
 131         Hashmap *bound_by_links;
 132         Hashmap *bound_to_links;
 133 } Link;
 134
 135 Link *link_unref(Link *link);
 136 Link *link_ref(Link *link);
 137 int link_get(Manager *m, int ifindex, Link **ret);
 138 int link_add(Manager *manager, sd_netlink_message *message, Link **ret);
 139 void link_drop(Link *link);
 140
 141 int link_up(Link *link);
 142 int link_down(Link *link);
 143
 144 int link_address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata);
 145 int link_route_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata);
 146
 147 void link_enter_failed(Link *link);
 148 int link_initialized(Link *link, struct udev_device *device);
 149
 150 void link_check_ready(Link *link);
 151
 152 void link_update_operstate(Link *link);
 153 int link_update(Link *link, sd_netlink_message *message);
 154
 155 void link_dirty(Link *link);
 156 void link_clean(Link *link);
 157 int link_save(Link *link);
 158
 159 int link_carrier_reset(Link *link);
 160 bool link_has_carrier(Link *link);
 161
 162 int link_ipv6ll_gained(Link *link, const struct in6_addr *address);
 163
 164 int link_set_mtu(Link *link, uint32_t mtu);
 165
 166 int ipv4ll_configure(Link *link);
 167 int dhcp4_configure(Link *link);
 168 int dhcp6_configure(Link *link);
 169 int dhcp6_request_address(Link *link, int ir);
 170
 171 const char* link_state_to_string(LinkState s) _const_;
 172 LinkState link_state_from_string(const char *s) _pure_;
 173
 174 const char* link_operstate_to_string(LinkOperationalState s) _const_;
 175 LinkOperationalState link_operstate_from_string(const char *s) _pure_;
 176
 177 extern const sd_bus_vtable link_vtable[];
 178
 179 int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error);
 180 int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error);
 181 int link_send_changed(Link *link, const char *property, ...) _sentinel_;
 182
 183 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_unref);
 184 #define _cleanup_link_unref_ _cleanup_(link_unrefp)
 185
 186 /* Macros which append INTERFACE= to the message */
 187
 188 #define log_link_full(link, level, error, ...)                          \
 189         ({                                                              \
 190                 const Link *_l = (link);                                \
 191                 _l ? log_object_internal(level, error, __FILE__, __LINE__, __func__, "INTERFACE=", _l->ifname, NULL, NULL, ##__VA_ARGS__) : \
 192                         log_internal(level, error, __FILE__, __LINE__, __func__, ##__VA_ARGS__); \
 193         })                                                              \
 194
 195 #define log_link_debug(link, ...)   log_link_full(link, LOG_DEBUG, 0, ##__VA_ARGS__)
 196 #define log_link_info(link, ...)    log_link_full(link, LOG_INFO, 0, ##__VA_ARGS__)
 197 #define log_link_notice(link, ...)  log_link_full(link, LOG_NOTICE, 0, ##__VA_ARGS__)
 198 #define log_link_warning(link, ...) log_link_full(link, LOG_WARNING, 0, ##__VA_ARGS__)
 199 #define log_link_error(link, ...)   log_link_full(link, LOG_ERR, 0, ##__VA_ARGS__)
 200
 201 #define log_link_debug_errno(link, error, ...)   log_link_full(link, LOG_DEBUG, error, ##__VA_ARGS__)
 202 #define log_link_info_errno(link, error, ...)    log_link_full(link, LOG_INFO, error, ##__VA_ARGS__)
 203 #define log_link_notice_errno(link, error, ...)  log_link_full(link, LOG_NOTICE, error, ##__VA_ARGS__)
 204 #define log_link_warning_errno(link, error, ...) log_link_full(link, LOG_WARNING, error, ##__VA_ARGS__)
 205 #define log_link_error_errno(link, error, ...)   log_link_full(link, LOG_ERR, error, ##__VA_ARGS__)
 206
 207 #define LOG_LINK_MESSAGE(link, fmt, ...) "MESSAGE=%s: " fmt, (link)->ifname, ##__VA_ARGS__
 208 #define LOG_LINK_INTERFACE(link) "INTERFACE=%s", (link)->ifname
 209
 210 #define ADDRESS_FMT_VAL(address)                   \
 211         be32toh((address).s_addr) >> 24,           \
 212         (be32toh((address).s_addr) >> 16) & 0xFFu, \
 213         (be32toh((address).s_addr) >> 8) & 0xFFu,  \
 214         be32toh((address).s_addr) & 0xFFu