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_UP_FAILED,
  27         IFEV_UPDATE,
  28         IFEV_FREE,
  29         IFEV_RELOAD,
  30         IFEV_LINK_UP,
  31 };
  32
  33 enum interface_state {
  34         IFS_SETUP,
  35         IFS_UP,
  36         IFS_TEARDOWN,
  37         IFS_DOWN,
  38 };
  39
  40 enum interface_config_state {
  41         IFC_NORMAL,
  42         IFC_RELOAD,
  43         IFC_REMOVE
  44 };
  45
  46 enum interface_id_selection_type {
  47         IFID_FIXED,
  48         IFID_RANDOM,
  49         IFID_EUI64
  50 };
  51
  52 enum interface_update_flags {
  53         IUF_ADDRESS     = (1 << 0),
  54         IUF_ROUTE       = (1 << 1),
  55         IUF_PREFIX      = (1 << 2),
  56         IUF_DATA        = (1 << 3),
  57 };
  58
  59 struct interface_error {
  60         struct list_head list;
  61
  62         const char *subsystem;
  63         const char *code;
  64         const char *data[];
  65 };
  66
  67 struct interface_user {
  68         struct list_head list;
  69         struct interface *iface;
  70         void (*cb)(struct interface_user *dep, struct interface *iface, enum interface_event ev);
  71 };
  72
  73 struct interface_ip_settings {
  74         struct interface *iface;
  75         bool enabled;
  76         bool no_defaultroute;
  77         bool no_dns;
  78         bool no_delegation;
  79
  80         struct vlist_tree addr;
  81         struct vlist_tree route;
  82         struct vlist_tree prefix;
  83
  84         struct vlist_simple_tree dns_servers;
  85         struct vlist_simple_tree dns_search;
  86 };
  87
  88 struct interface_data {
  89         struct avl_node node;
  90         struct blob_attr data[];
  91 };
  92
  93 struct interface_assignment_class {
  94         struct list_head head;
  95         char name[];
  96 };
  97
  98 /*
  99  * interface configuration
 100  */
 101 struct interface {
 102         struct vlist_node node;
 103         struct list_head hotplug_list;
 104         enum interface_event hotplug_ev;
 105
 106         const char *name;
 107         const char *ifname;
 108
 109         bool available;
 110         bool autostart;
 111         bool config_autostart;
 112         bool device_config;
 113         bool enabled;
 114         bool link_state;
 115         bool force_link;
 116         bool dynamic;
 117         bool policy_rules_set;
 118         bool link_up_event;
 119
 120         time_t start_time;
 121         enum interface_state state;
 122         enum interface_config_state config_state;
 123         enum interface_update_flags updated;
 124
 125         struct list_head users;
 126
 127         /* for alias interface */
 128         const char *parent_ifname;
 129         struct interface_user parent_iface;
 130
 131         /* main interface that the interface is bound to */
 132         struct device_user main_dev;
 133         struct device_user ext_dev;
 134
 135         /* interface that layer 3 communication will go through */
 136         struct device_user l3_dev;
 137
 138         struct blob_attr *config;
 139
 140         /* primary protocol state */
 141         const struct proto_handler *proto_handler;
 142         struct interface_proto_state *proto;
 143
 144         struct interface_ip_settings proto_ip;
 145         struct interface_ip_settings config_ip;
 146         struct vlist_tree host_routes;
 147
 148         int metric;
 149         int dns_metric;
 150         unsigned int ip4table;
 151         unsigned int ip6table;
 152
 153         /* IPv6 assignment parameters */
 154         enum interface_id_selection_type assignment_iface_id_selection;
 155         struct in6_addr assignment_fixed_iface_id;
 156         uint8_t assignment_length;
 157         int32_t assignment_hint;
 158         struct list_head assignment_classes;
 159         int assignment_weight;
 160
 161         /* errors/warnings while trying to bring up the interface */
 162         struct list_head errors;
 163
 164         /* extra data provided by protocol handlers or modules */
 165         struct avl_tree data;
 166
 167         struct uloop_timeout remove_timer;
 168         struct ubus_object ubus;
 169 };
 170
 171
 172 extern struct vlist_tree interfaces;
 173 extern const struct uci_blob_param_list interface_attr_list;
 174
 175 struct interface *interface_alloc(const char *name, struct blob_attr *config);
 176
 177 void interface_set_dynamic(struct interface *iface);
 178
 179 void interface_add(struct interface *iface, struct blob_attr *config);
 180 bool interface_add_alias(struct interface *iface, struct blob_attr *config);
 181
 182 void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state);
 183
 184 void interface_set_available(struct interface *iface, bool new_state);
 185 int interface_set_up(struct interface *iface);
 186 int interface_set_down(struct interface *iface);
 187 void __interface_set_down(struct interface *iface, bool force);
 188 int interface_renew(struct interface *iface);
 189
 190 void interface_set_main_dev(struct interface *iface, struct device *dev);
 191 void interface_set_l3_dev(struct interface *iface, struct device *dev);
 192
 193 void interface_add_user(struct interface_user *dep, struct interface *iface);
 194 void interface_remove_user(struct interface_user *dep);
 195
 196 int interface_remove_link(struct interface *iface, struct device *dev);
 197 int interface_handle_link(struct interface *iface, const char *name, bool add, bool link_ext);
 198
 199 void interface_add_error(struct interface *iface, const char *subsystem,
 200                          const char *code, const char **data, int n_data);
 201
 202 int interface_add_data(struct interface *iface, const struct blob_attr *data);
 203 int interface_parse_data(struct interface *iface, const struct blob_attr *attr);
 204
 205 void interface_update_start(struct interface *iface, const bool keep_old);
 206 void interface_update_complete(struct interface *iface);
 207
 208 void interface_start_pending(void);
 209
 210 #endif