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         /* send when a new interface created. This is before proto handlers has been attached. */
  32         IFEV_CREATE,
  33 };
  34
  35 enum interface_state {
  36         IFS_SETUP,
  37         IFS_UP,
  38         IFS_TEARDOWN,
  39         IFS_DOWN,
  40 };
  41
  42 enum interface_config_state {
  43         IFC_NORMAL,
  44         IFC_RELOAD,
  45         IFC_REMOVE
  46 };
  47
  48 enum interface_id_selection_type {
  49         IFID_FIXED,
  50         IFID_RANDOM,
  51         IFID_EUI64
  52 };
  53
  54 enum interface_update_flags {
  55         IUF_ADDRESS     = (1 << 0),
  56         IUF_ROUTE       = (1 << 1),
  57         IUF_PREFIX      = (1 << 2),
  58         IUF_DATA        = (1 << 3),
  59 };
  60
  61 struct interface_error {
  62         struct list_head list;
  63
  64         const char *subsystem;
  65         const char *code;
  66         const char *data[];
  67 };
  68
  69 struct interface_user {
  70         struct list_head list;
  71         struct interface *iface;
  72         void (*cb)(struct interface_user *dep, struct interface *iface, enum interface_event ev);
  73 };
  74
  75 struct interface_ip_settings {
  76         struct interface *iface;
  77         bool enabled;
  78         bool no_defaultroute;
  79         bool no_dns;
  80         bool no_delegation;
  81
  82         struct vlist_tree addr;
  83         struct vlist_tree route;
  84         struct vlist_tree prefix;
  85         struct vlist_tree neighbor;
  86
  87         struct vlist_simple_tree dns_servers;
  88         struct vlist_simple_tree dns_search;
  89 };
  90
  91 struct interface_data {
  92         struct avl_node node;
  93         struct blob_attr data[];
  94 };
  95
  96 struct interface_assignment_class {
  97         struct list_head head;
  98         char name[];
  99 };
 100
 101 /*
 102  * interface configuration
 103  */
 104 struct interface {
 105         struct vlist_node node;
 106         struct list_head hotplug_list;
 107         enum interface_event hotplug_ev;
 108
 109         const char *name;
 110         const char *ifname;
 111         char *jail;
 112         char *jail_ifname;
 113         int netns_fd;
 114
 115         bool available;
 116         bool autostart;
 117         bool config_autostart;
 118         bool device_config;
 119         bool enabled;
 120         bool link_state;
 121         bool force_link;
 122         bool dynamic;
 123         bool policy_rules_set;
 124         bool link_up_event;
 125
 126         time_t start_time;
 127         enum interface_state state;
 128         enum interface_config_state config_state;
 129         enum interface_update_flags updated;
 130
 131         struct list_head users;
 132
 133         /* for alias interface */
 134         const char *parent_ifname;
 135         struct interface_user parent_iface;
 136
 137         /* main interface that the interface is bound to */
 138         struct device_user main_dev;
 139         struct device_user ext_dev;
 140
 141         /* interface that layer 3 communication will go through */
 142         struct device_user l3_dev;
 143
 144         struct blob_attr *config;
 145
 146         /* primary protocol state */
 147         const struct proto_handler *proto_handler;
 148         struct interface_proto_state *proto;
 149
 150         struct interface_ip_settings proto_ip;
 151         struct interface_ip_settings config_ip;
 152         struct vlist_tree host_routes;
 153         struct vlist_tree host_neighbors;
 154
 155         int metric;
 156         int dns_metric;
 157         unsigned int ip4table;
 158         unsigned int ip6table;
 159
 160         /* IPv6 assignment parameters */
 161         enum interface_id_selection_type assignment_iface_id_selection;
 162         struct in6_addr assignment_fixed_iface_id;
 163         uint8_t assignment_length;
 164         int32_t assignment_hint;
 165         struct list_head assignment_classes;
 166         int assignment_weight;
 167
 168         /* errors/warnings while trying to bring up the interface */
 169         struct list_head errors;
 170
 171         /* extra data provided by protocol handlers or modules */
 172         struct avl_tree data;
 173
 174         struct uloop_timeout remove_timer;
 175         struct ubus_object ubus;
 176 };
 177
 178
 179 extern struct vlist_tree interfaces;
 180 extern const struct uci_blob_param_list interface_attr_list;
 181
 182 struct interface *interface_alloc(const char *name, struct blob_attr *config, bool dynamic);
 183
 184 bool interface_add(struct interface *iface, struct blob_attr *config);
 185 bool interface_add_alias(struct interface *iface, struct blob_attr *config);
 186
 187 void interface_set_proto_state(struct interface *iface, struct interface_proto_state *state);
 188
 189 void interface_set_available(struct interface *iface, bool new_state);
 190 void interface_set_up(struct interface *iface);
 191 void interface_set_down(struct interface *iface);
 192 int interface_renew(struct interface *iface);
 193
 194 void interface_set_l3_dev(struct interface *iface, struct device *dev);
 195
 196 void interface_add_user(struct interface_user *dep, struct interface *iface);
 197 void interface_remove_user(struct interface_user *dep);
 198
 199 int interface_handle_link(struct interface *iface, const char *name, bool add, bool link_ext);
 200
 201 void interface_add_error(struct interface *iface, const char *subsystem,
 202                          const char *code, const char **data, int n_data);
 203
 204 int interface_add_data(struct interface *iface, const struct blob_attr *data);
 205 int interface_parse_data(struct interface *iface, const struct blob_attr *attr);
 206
 207 void interface_update_start(struct interface *iface, const bool keep_old);
 208 void interface_update_complete(struct interface *iface);
 209
 210 void interface_start_pending(void);
 211 void interface_start_jail(const char *jail, const pid_t netns_pid);
 212 void interface_stop_jail(const char *jail, const pid_t netns_pid);
 213
 214 #endif