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Sources/netifd/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 *device;
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, struct blob_attr *vlan, 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
215 

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