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Sources/netifd/device.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_DEVICE_H
 15 #define __NETIFD_DEVICE_H
 16 
 17 #include <libubox/avl.h>
 18 #include <libubox/safe_list.h>
 19 #include <libubox/kvlist.h>
 20 #include <netinet/in.h>
 21 
 22 struct device;
 23 struct device_type;
 24 struct device_user;
 25 struct device_hotplug_ops;
 26 struct bridge_vlan;
 27 struct interface;
 28 
 29 typedef int (*device_state_cb)(struct device *, bool up);
 30 
 31 enum {
 32         DEV_ATTR_TYPE,
 33         DEV_ATTR_MTU,
 34         DEV_ATTR_MTU6,
 35         DEV_ATTR_MACADDR,
 36         DEV_ATTR_TXQUEUELEN,
 37         DEV_ATTR_ENABLED,
 38         DEV_ATTR_IPV6,
 39         DEV_ATTR_PROMISC,
 40         DEV_ATTR_RPFILTER,
 41         DEV_ATTR_ACCEPTLOCAL,
 42         DEV_ATTR_IGMPVERSION,
 43         DEV_ATTR_MLDVERSION,
 44         DEV_ATTR_NEIGHREACHABLETIME,
 45         DEV_ATTR_DADTRANSMITS,
 46         DEV_ATTR_MULTICAST_TO_UNICAST,
 47         DEV_ATTR_MULTICAST_ROUTER,
 48         DEV_ATTR_MULTICAST_FAST_LEAVE,
 49         DEV_ATTR_MULTICAST,
 50         DEV_ATTR_LEARNING,
 51         DEV_ATTR_UNICAST_FLOOD,
 52         DEV_ATTR_NEIGHGCSTALETIME,
 53         DEV_ATTR_SENDREDIRECTS,
 54         DEV_ATTR_NEIGHLOCKTIME,
 55         DEV_ATTR_ISOLATE,
 56         DEV_ATTR_IP6SEGMENTROUTING,
 57         DEV_ATTR_DROP_V4_UNICAST_IN_L2_MULTICAST,
 58         DEV_ATTR_DROP_V6_UNICAST_IN_L2_MULTICAST,
 59         DEV_ATTR_DROP_GRATUITOUS_ARP,
 60         DEV_ATTR_DROP_UNSOLICITED_NA,
 61         DEV_ATTR_ARP_ACCEPT,
 62         DEV_ATTR_AUTH,
 63         DEV_ATTR_SPEED,
 64         DEV_ATTR_DUPLEX,
 65         __DEV_ATTR_MAX,
 66 };
 67 
 68 enum dev_change_type {
 69         DEV_CONFIG_NO_CHANGE,
 70         DEV_CONFIG_APPLIED,
 71         DEV_CONFIG_RESTART,
 72         DEV_CONFIG_RECREATE,
 73 };
 74 
 75 struct device_type {
 76         struct list_head list;
 77         const char *name;
 78 
 79         bool bridge_capability;
 80         const char *name_prefix;
 81 
 82         const struct uci_blob_param_list *config_params;
 83 
 84         struct device *(*create)(const char *name, struct device_type *devtype,
 85                 struct blob_attr *attr);
 86         void (*config_init)(struct device *);
 87         enum dev_change_type (*reload)(struct device *, struct blob_attr *);
 88         void (*vlan_update)(struct device *);
 89         void (*dump_info)(struct device *, struct blob_buf *buf);
 90         void (*dump_stats)(struct device *, struct blob_buf *buf);
 91         int (*check_state)(struct device *);
 92         void (*stp_init)(struct device *);
 93         void (*free)(struct device *);
 94 };
 95 
 96 enum {
 97         DEV_OPT_MTU                     = (1ULL << 0),
 98         DEV_OPT_MACADDR                 = (1ULL << 1),
 99         DEV_OPT_TXQUEUELEN              = (1ULL << 2),
100         DEV_OPT_IPV6                    = (1ULL << 3),
101         DEV_OPT_PROMISC                 = (1ULL << 4),
102         DEV_OPT_RPFILTER                = (1ULL << 5),
103         DEV_OPT_ACCEPTLOCAL             = (1ULL << 6),
104         DEV_OPT_IGMPVERSION             = (1ULL << 7),
105         DEV_OPT_MLDVERSION              = (1ULL << 8),
106         DEV_OPT_NEIGHREACHABLETIME      = (1ULL << 9),
107         DEV_OPT_DEFAULT_MACADDR         = (1ULL << 10),
108         DEV_OPT_AUTH                    = (1ULL << 11),
109         DEV_OPT_MTU6                    = (1ULL << 12),
110         DEV_OPT_DADTRANSMITS            = (1ULL << 13),
111         DEV_OPT_MULTICAST_TO_UNICAST    = (1ULL << 14),
112         DEV_OPT_MULTICAST_ROUTER        = (1ULL << 15),
113         DEV_OPT_MULTICAST               = (1ULL << 16),
114         DEV_OPT_LEARNING                = (1ULL << 17),
115         DEV_OPT_UNICAST_FLOOD           = (1ULL << 18),
116         DEV_OPT_NEIGHGCSTALETIME        = (1ULL << 19),
117         DEV_OPT_MULTICAST_FAST_LEAVE    = (1ULL << 20),
118         DEV_OPT_SENDREDIRECTS           = (1ULL << 21),
119         DEV_OPT_NEIGHLOCKTIME           = (1ULL << 22),
120         DEV_OPT_ISOLATE                 = (1ULL << 23),
121         DEV_OPT_IP6SEGMENTROUTING       = (1ULL << 24),
122         DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST = (1ULL << 25),
123         DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST = (1ULL << 26),
124         DEV_OPT_DROP_GRATUITOUS_ARP     = (1ULL << 27),
125         DEV_OPT_DROP_UNSOLICITED_NA     = (1ULL << 28),
126         DEV_OPT_ARP_ACCEPT              = (1ULL << 29),
127         DEV_OPT_SPEED                   = (1ULL << 30),
128         DEV_OPT_DUPLEX                  = (1ULL << 31),
129 };
130 
131 /* events broadcasted to all users of a device */
132 enum device_event {
133         DEV_EVENT_ADD,
134         DEV_EVENT_REMOVE,
135 
136         DEV_EVENT_UPDATE_IFNAME,
137         DEV_EVENT_UPDATE_IFINDEX,
138 
139         DEV_EVENT_SETUP,
140         DEV_EVENT_TEARDOWN,
141         DEV_EVENT_UP,
142         DEV_EVENT_DOWN,
143 
144         DEV_EVENT_AUTH_UP,
145         DEV_EVENT_LINK_UP,
146         DEV_EVENT_LINK_DOWN,
147 
148         /* Topology changed (i.e. bridge member added) */
149         DEV_EVENT_TOPO_CHANGE,
150 
151         __DEV_EVENT_MAX
152 };
153 
154 /*
155  * device dependency with callbacks
156  */
157 struct device_user {
158         struct safe_list list;
159 
160         bool claimed;
161         bool hotplug;
162         bool alias;
163 
164         uint8_t ev_idx[__DEV_EVENT_MAX];
165 
166         struct device *dev;
167         void (*cb)(struct device_user *, enum device_event);
168 };
169 
170 struct device_settings {
171         uint64_t flags;
172         uint64_t valid_flags;
173         unsigned int mtu;
174         unsigned int mtu6;
175         unsigned int txqueuelen;
176         uint8_t macaddr[6];
177         bool ipv6;
178         bool promisc;
179         unsigned int rpfilter;
180         bool acceptlocal;
181         unsigned int igmpversion;
182         unsigned int mldversion;
183         unsigned int neigh4reachabletime;
184         unsigned int neigh6reachabletime;
185         unsigned int neigh4gcstaletime;
186         unsigned int neigh6gcstaletime;
187         int neigh4locktime;
188         unsigned int dadtransmits;
189         bool multicast_to_unicast;
190         unsigned int multicast_router;
191         bool multicast_fast_leave;
192         bool multicast;
193         bool learning;
194         bool unicast_flood;
195         bool sendredirects;
196         bool ip6segmentrouting;
197         bool isolate;
198         bool drop_v4_unicast_in_l2_multicast;
199         bool drop_v6_unicast_in_l2_multicast;
200         bool drop_gratuitous_arp;
201         bool drop_unsolicited_na;
202         bool arp_accept;
203         bool auth;
204         unsigned int speed;
205         bool duplex;
206 };
207 
208 /*
209  * link layer device. typically represents a linux network device.
210  * can be used to support VLANs as well
211  */
212 struct device {
213         struct device_type *type;
214 
215         struct avl_node avl;
216         struct safe_list users;
217         struct safe_list aliases;
218 
219         struct vlist_tree vlans;
220         struct kvlist vlan_aliases;
221 
222         char ifname[IFNAMSIZ + 1];
223         int ifindex;
224 
225         struct blob_attr *config;
226         bool config_pending;
227         bool sys_present;
228         /* DEV_EVENT_ADD */
229         bool present;
230         /* DEV_EVENT_UP */
231         int active;
232         /* DEV_EVENT_LINK_UP */
233         bool link_active;
234         bool auth_status;
235 
236         bool external;
237         bool disabled;
238         bool deferred;
239         bool hidden;
240 
241         bool current_config;
242         bool iface_config;
243         bool default_config;
244         bool wireless;
245         bool wireless_ap;
246         bool wireless_proxyarp;
247         bool wireless_isolate;
248         bool bpdu_filter;
249 
250         struct interface *config_iface;
251 
252         /* set interface up or down */
253         device_state_cb set_state;
254 
255         const struct device_hotplug_ops *hotplug_ops;
256 
257         struct device_user parent;
258 
259         struct device_settings orig_settings;
260         struct device_settings settings;
261 };
262 
263 struct device_hotplug_ops {
264         int (*prepare)(struct device *dev, struct device **bridge_dev);
265         int (*add)(struct device *main, struct device *member, struct blob_attr *vlan);
266         int (*del)(struct device *main, struct device *member, struct blob_attr *vlan);
267 };
268 
269 enum bridge_vlan_flags {
270         BRVLAN_F_SELF =         (1 << 0),
271         BRVLAN_F_PVID =         (1 << 1),
272         BRVLAN_F_UNTAGGED =     (1 << 2),
273 };
274 
275 struct bridge_vlan_port {
276         const char *ifname;
277         uint16_t flags;
278         int8_t check;
279 };
280 
281 struct bridge_vlan_hotplug_port {
282         struct list_head list;
283         struct bridge_vlan_port port;
284 };
285 
286 struct bridge_vlan {
287         struct vlist_node node;
288 
289         struct bridge_vlan_port *ports;
290         int n_ports;
291 
292         struct list_head hotplug_ports;
293 
294         uint16_t vid;
295         bool local;
296         bool pending;
297 };
298 
299 extern const struct uci_blob_param_list device_attr_list;
300 extern struct device_type simple_device_type;
301 extern struct device_type tunnel_device_type;
302 
303 void device_vlan_update(bool done);
304 void device_stp_init(void);
305 
306 int device_type_add(struct device_type *devtype);
307 struct device_type *device_type_get(const char *tname);
308 struct device *device_create(const char *name, struct device_type *type,
309                              struct blob_attr *config);
310 void device_merge_settings(struct device *dev, struct device_settings *n);
311 void device_init_settings(struct device *dev, struct blob_attr **tb);
312 void device_init_pending(void);
313 
314 enum dev_change_type
315 device_apply_config(struct device *dev, struct device_type *type,
316                     struct blob_attr *config);
317 
318 void device_reset_config(void);
319 void device_reset_old(void);
320 
321 int device_init_virtual(struct device *dev, struct device_type *type, const char *name);
322 int device_init(struct device *dev, struct device_type *type, const char *ifname);
323 void device_cleanup(struct device *dev);
324 struct device *device_find(const char *name);
325 
326 struct device *__device_get(const char *name, int create, bool check_vlan);
327 static inline struct device *device_get(const char *name, int create)
328 {
329         return __device_get(name, create, true);
330 }
331 
332 void device_add_user(struct device_user *dep, struct device *dev);
333 void device_remove_user(struct device_user *dep);
334 void device_broadcast_event(struct device *dev, enum device_event ev);
335 
336 void device_set_present(struct device *dev, bool state);
337 void device_set_link(struct device *dev, bool state);
338 void device_set_ifindex(struct device *dev, int ifindex);
339 int device_set_ifname(struct device *dev, const char *name);
340 void device_refresh_present(struct device *dev);
341 int device_claim(struct device_user *dep);
342 void device_release(struct device_user *dep);
343 int device_check_state(struct device *dev);
344 void device_dump_status(struct blob_buf *b, struct device *dev);
345 
346 void device_free_unused(void);
347 
348 struct device *get_vlan_device_chain(const char *ifname, int create);
349 void alias_notify_device(const char *name, struct device *dev);
350 struct device *device_alias_get(const char *name);
351 
352 void device_set_auth_status(struct device *dev, bool value);
353 
354 static inline void
355 device_set_deferred(struct device *dev, bool value)
356 {
357         dev->deferred = value;
358         device_refresh_present(dev);
359 }
360 
361 static inline void
362 device_set_disabled(struct device *dev, bool value)
363 {
364         dev->disabled = value;
365         device_refresh_present(dev);
366 }
367 
368 static inline bool
369 device_link_active(struct device *dev)
370 {
371         if (dev->settings.auth && !dev->auth_status)
372                 return false;
373 
374         return dev->link_active;
375 }
376 
377 bool device_check_ip6segmentrouting(void);
378 void device_hotplug_event(const char *name, bool add);
379 
380 #endif
381 

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