interface.h

   1 /*
   2  * netifd - network interface daemon
   3  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14 #ifndef __NETIFD_INTERFACE_H
  15 #define __NETIFD_INTERFACE_H
  16
  17 #include "device.h"
  18 #include "config.h"
  19
  20 struct interface;
  21 struct interface_proto_state;
  22
  23 enum interface_event {
  24         IFEV_DOWN,
  25         IFEV_UP,
  26         IFEV_UPDATE,
  27         IFEV_FREE,
  28         IFEV_RELOAD,
  29 };
  30
  31 enum interface_state {
  32         IFS_SETUP,
  33         IFS_UP,
  34         IFS_TEARDOWN,
  35         IFS_DOWN,
  36 };
  37
  38 enum interface_config_state {
  39         IFC_NORMAL,
  40         IFC_RELOAD,
  41         IFC_REMOVE
  42 };
  43
  44 enum interface_id_selection_type {
  45         IFID_FIXED,
  46         IFID_RANDOM,
  47         IFID_EUI64
  48 };
  49
  50 enum interface_update_flags {
  51         IUF_ADDRESS     = (1 << 0),
  52         IUF_ROUTE       = (1 << 1),
  53         IUF_PREFIX      = (1 << 2),
  54         IUF_DATA        = (1 << 3),
  55 };
  56
  57 struct interface_error {
  58         struct list_head list;
  59
  60         const char *subsystem;
  61         const char *code;
  62         const char *data[];
  63 };
  64
  65 struct interface_user {
  66         struct list_head list;
  67         struct interface *iface;
  68         void (*cb)(struct interface_user *dep, struct interface *iface, enum interface_event ev);
  69 };
  70
  71 struct interface_ip_settings {
  72         struct interface *iface;
  73         bool enabled;
  74         bool no_defaultroute;
  75         bool no_dns;
  76         bool no_delegation;
  77
  78         struct vlist_tree addr;
  79         struct vlist_tree route;
  80         struct vlist_tree prefix;
  81
  82         struct vlist_simple_tree dns_servers;
  83         struct vlist_simple_tree dns_search;
  84 };
  85
  86 struct interface_data {
  87         struct avl_node node;
  88         struct blob_attr data[];
  89 };
  90
  91 struct interface_assignment_class {
  92         struct list_head head;
  93         char name[];
  94 };
  95
  96 /*
  97  * interface configuration
  98  */
  99 struct interface {
 100         struct vlist_node node;
 101         struct list_head hotplug_list;
 102         enum interface_event hotplug_ev;
 103
 104         const char *name;
 105         const char *ifname;
 106
 107         bool available;
 108         bool autostart;
 109         bool config_autostart;
 110         bool device_config;
 111         bool enabled;
 112         bool link_state;
 113         bool force_link;
 114         bool dynamic;
 115
 116         time_t start_time;
 117         enum interface_state state;
 118         enum interface_config_state config_state;
 119         enum interface_update_flags updated;
 120
 121         struct list_head users;
 122
 123         /* for alias interface */
 124         const char *parent_ifname;
 125         struct interface_user parent_iface;
 126
 127         /* main interface that the interface is bound to */
 128         struct device_user main_dev;
 129         struct device_user ext_dev;
 130
 131         /* interface that layer 3 communication will go through */
 132         struct device_user l3_dev;
 133
 134         struct blob_attr *config;
 135
 136         /* primary protocol state */
 137         const struct proto_handler *proto_handler;
 138         struct interface_proto_state *proto;
 139
 140         struct interface_ip_settings proto_ip;
 141         struct interface_ip_settings config_ip;
 142         struct vlist_tree host_routes;
 143
 144         int metric;
 145         unsigned int ip4table;
 146         unsigned int ip6table;
 147
 148         /* IPv6 assignment parameters */
 149         enum interface_id_selection_type assignment_iface_id_selection;
 150         struct in6_addr assignment_fixed_iface_id;
 151         uint8_t assignment_length;
 152         int32_t assignment_hint;
 153         struct list_head assignment_classes;
 154
 155         /* errors/warnings while trying to bring up the interface */
 156         struct list_head errors;
 157
 158         /* extra data provided by protocol handlers or modules */
 159         struct avl_tree data;
 160
 161         struct uloop_timeout remove_timer;
 162         struct ubus_object ubus;
 163 };
 164
 165
 166 extern struct vlist_tree interfaces;
 167 extern const struct uci_blob_param_list interface_attr_list;
 168
 169 struct interface *interface_alloc(const char *name, struct blob_attr *config);
 170
 171 void interface_set_dynamic(struct interface *iface);
 172
 173 void interface_add(struct interface *iface, struct blob_attr *config);
 174 bool interface_add_alias(struct interface *iface, struct blob_attr *config);
 175
 176 void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state);
 177
 178 void interface_set_available(struct interface *iface, bool new_state);
 179 int interface_set_up(struct interface *iface);
 180 int interface_set_down(struct interface *iface);
 181 void __interface_set_down(struct interface *iface, bool force);
 182
 183 void interface_set_main_dev(struct interface *iface, struct device *dev);
 184 void interface_set_l3_dev(struct interface *iface, struct device *dev);
 185
 186 void interface_add_user(struct interface_user *dep, struct interface *iface);
 187 void interface_remove_user(struct interface_user *dep);
 188
 189 int interface_remove_link(struct interface *iface, struct device *dev);
 190 int interface_handle_link(struct interface *iface, const char *name, bool add, bool link_ext);
 191
 192 void interface_add_error(struct interface *iface, const char *subsystem,
 193                          const char *code, const char **data, int n_data);
 194
 195 int interface_add_data(struct interface *iface, const struct blob_attr *data);
 196
 197 void interface_update_start(struct interface *iface);
 198 void interface_update_complete(struct interface *iface);
 199
 200 void interface_start_pending(void);
 201
 202 #endif