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ed(1): simplify by using arc4random_buf().
[freebsd-src.git] / sys / net / if_vxlan.c
bloba5631fcc20df8cf800ac76060465bfacce0ef480
1 /*-
2 * Copyright (c) 2014, Bryan Venteicher <bryanv@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "opt_inet.h"
28 #include "opt_inet6.h"
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #include <sys/param.h>
34 #include <sys/eventhandler.h>
35 #include <sys/kernel.h>
36 #include <sys/lock.h>
37 #include <sys/hash.h>
38 #include <sys/malloc.h>
39 #include <sys/mbuf.h>
40 #include <sys/module.h>
41 #include <sys/refcount.h>
42 #include <sys/rmlock.h>
43 #include <sys/priv.h>
44 #include <sys/proc.h>
45 #include <sys/queue.h>
46 #include <sys/sbuf.h>
47 #include <sys/socket.h>
48 #include <sys/socketvar.h>
49 #include <sys/sockio.h>
50 #include <sys/sysctl.h>
51 #include <sys/systm.h>
52
53 #include <net/bpf.h>
54 #include <net/ethernet.h>
55 #include <net/if.h>
56 #include <net/if_var.h>
57 #include <net/if_clone.h>
58 #include <net/if_dl.h>
59 #include <net/if_types.h>
60 #include <net/if_vxlan.h>
61 #include <net/netisr.h>
62
63 #include <netinet/in.h>
64 #include <netinet/in_systm.h>
65 #include <netinet/in_var.h>
66 #include <netinet/in_pcb.h>
67 #include <netinet/ip.h>
68 #include <netinet/ip6.h>
69 #include <netinet/ip_var.h>
70 #include <netinet6/ip6_var.h>
71 #include <netinet/udp.h>
72 #include <netinet/udp_var.h>
73
74 struct vxlan_softc;
75 LIST_HEAD(vxlan_softc_head, vxlan_softc);
76
77 struct vxlan_socket_mc_info {
78 union vxlan_sockaddr vxlsomc_saddr;
79 union vxlan_sockaddr vxlsomc_gaddr;
80 int vxlsomc_ifidx;
81 int vxlsomc_users;
82 };
83
84 #define VXLAN_SO_MC_MAX_GROUPS 32
85
86 #define VXLAN_SO_VNI_HASH_SHIFT 6
87 #define VXLAN_SO_VNI_HASH_SIZE (1 << VXLAN_SO_VNI_HASH_SHIFT)
88 #define VXLAN_SO_VNI_HASH(_vni) ((_vni) % VXLAN_SO_VNI_HASH_SIZE)
89
90 struct vxlan_socket {
91 struct socket *vxlso_sock;
92 struct rmlock vxlso_lock;
93 u_int vxlso_refcnt;
94 union vxlan_sockaddr vxlso_laddr;
95 LIST_ENTRY(vxlan_socket) vxlso_entry;
96 struct vxlan_softc_head vxlso_vni_hash[VXLAN_SO_VNI_HASH_SIZE];
97 struct vxlan_socket_mc_info vxlso_mc[VXLAN_SO_MC_MAX_GROUPS];
98 };
99
100 #define VXLAN_SO_RLOCK(_vso, _p) rm_rlock(&(_vso)->vxlso_lock, (_p))
101 #define VXLAN_SO_RUNLOCK(_vso, _p) rm_runlock(&(_vso)->vxlso_lock, (_p))
102 #define VXLAN_SO_WLOCK(_vso) rm_wlock(&(_vso)->vxlso_lock)
103 #define VXLAN_SO_WUNLOCK(_vso) rm_wunlock(&(_vso)->vxlso_lock)
104 #define VXLAN_SO_LOCK_ASSERT(_vso) \
105 rm_assert(&(_vso)->vxlso_lock, RA_LOCKED)
106 #define VXLAN_SO_LOCK_WASSERT(_vso) \
107 rm_assert(&(_vso)->vxlso_lock, RA_WLOCKED)
108
109 #define VXLAN_SO_ACQUIRE(_vso) refcount_acquire(&(_vso)->vxlso_refcnt)
110 #define VXLAN_SO_RELEASE(_vso) refcount_release(&(_vso)->vxlso_refcnt)
111
112 struct vxlan_ftable_entry {
113 LIST_ENTRY(vxlan_ftable_entry) vxlfe_hash;
114 uint16_t vxlfe_flags;
115 uint8_t vxlfe_mac[ETHER_ADDR_LEN];
116 union vxlan_sockaddr vxlfe_raddr;
117 time_t vxlfe_expire;
118 };
119
120 #define VXLAN_FE_FLAG_DYNAMIC 0x01
121 #define VXLAN_FE_FLAG_STATIC 0x02
122
123 #define VXLAN_FE_IS_DYNAMIC(_fe) \
124 ((_fe)->vxlfe_flags & VXLAN_FE_FLAG_DYNAMIC)
125
126 #define VXLAN_SC_FTABLE_SHIFT 9
127 #define VXLAN_SC_FTABLE_SIZE (1 << VXLAN_SC_FTABLE_SHIFT)
128 #define VXLAN_SC_FTABLE_MASK (VXLAN_SC_FTABLE_SIZE - 1)
129 #define VXLAN_SC_FTABLE_HASH(_sc, _mac) \
130 (vxlan_mac_hash(_sc, _mac) % VXLAN_SC_FTABLE_SIZE)
131
132 LIST_HEAD(vxlan_ftable_head, vxlan_ftable_entry);
133
134 struct vxlan_statistics {
135 uint32_t ftable_nospace;
136 uint32_t ftable_lock_upgrade_failed;
137 };
138
139 struct vxlan_softc {
140 struct ifnet *vxl_ifp;
141 struct vxlan_socket *vxl_sock;
142 uint32_t vxl_vni;
143 union vxlan_sockaddr vxl_src_addr;
144 union vxlan_sockaddr vxl_dst_addr;
145 uint32_t vxl_flags;
146 #define VXLAN_FLAG_INIT 0x0001
147 #define VXLAN_FLAG_TEARDOWN 0x0002
148 #define VXLAN_FLAG_LEARN 0x0004
149
150 uint32_t vxl_port_hash_key;
151 uint16_t vxl_min_port;
152 uint16_t vxl_max_port;
153 uint8_t vxl_ttl;
154
155 /* Lookup table from MAC address to forwarding entry. */
156 uint32_t vxl_ftable_cnt;
157 uint32_t vxl_ftable_max;
158 uint32_t vxl_ftable_timeout;
159 uint32_t vxl_ftable_hash_key;
160 struct vxlan_ftable_head *vxl_ftable;
161
162 /* Derived from vxl_dst_addr. */
163 struct vxlan_ftable_entry vxl_default_fe;
164
165 struct ip_moptions *vxl_im4o;
166 struct ip6_moptions *vxl_im6o;
167
168 struct rmlock vxl_lock;
169 volatile u_int vxl_refcnt;
170
171 int vxl_unit;
172 int vxl_vso_mc_index;
173 struct vxlan_statistics vxl_stats;
174 struct sysctl_oid *vxl_sysctl_node;
175 struct sysctl_ctx_list vxl_sysctl_ctx;
176 struct callout vxl_callout;
177 uint8_t vxl_hwaddr[ETHER_ADDR_LEN];
178 int vxl_mc_ifindex;
179 struct ifnet *vxl_mc_ifp;
180 char vxl_mc_ifname[IFNAMSIZ];
181 LIST_ENTRY(vxlan_softc) vxl_entry;
182 LIST_ENTRY(vxlan_softc) vxl_ifdetach_list;
183 };
184
185 #define VXLAN_RLOCK(_sc, _p) rm_rlock(&(_sc)->vxl_lock, (_p))
186 #define VXLAN_RUNLOCK(_sc, _p) rm_runlock(&(_sc)->vxl_lock, (_p))
187 #define VXLAN_WLOCK(_sc) rm_wlock(&(_sc)->vxl_lock)
188 #define VXLAN_WUNLOCK(_sc) rm_wunlock(&(_sc)->vxl_lock)
189 #define VXLAN_LOCK_WOWNED(_sc) rm_wowned(&(_sc)->vxl_lock)
190 #define VXLAN_LOCK_ASSERT(_sc) rm_assert(&(_sc)->vxl_lock, RA_LOCKED)
191 #define VXLAN_LOCK_WASSERT(_sc) rm_assert(&(_sc)->vxl_lock, RA_WLOCKED)
192 #define VXLAN_UNLOCK(_sc, _p) do { \
193 if (VXLAN_LOCK_WOWNED(_sc)) \
194 VXLAN_WUNLOCK(_sc); \
195 else \
196 VXLAN_RUNLOCK(_sc, _p); \
197 } while (0)
198
199 #define VXLAN_ACQUIRE(_sc) refcount_acquire(&(_sc)->vxl_refcnt)
200 #define VXLAN_RELEASE(_sc) refcount_release(&(_sc)->vxl_refcnt)
201
202 #define satoconstsin(sa) ((const struct sockaddr_in *)(sa))
203 #define satoconstsin6(sa) ((const struct sockaddr_in6 *)(sa))
204
205 struct vxlanudphdr {
206 struct udphdr vxlh_udp;
207 struct vxlan_header vxlh_hdr;
208 } __packed;
209
210 static int vxlan_ftable_addr_cmp(const uint8_t *, const uint8_t *);
211 static void vxlan_ftable_init(struct vxlan_softc *);
212 static void vxlan_ftable_fini(struct vxlan_softc *);
213 static void vxlan_ftable_flush(struct vxlan_softc *, int);
214 static void vxlan_ftable_expire(struct vxlan_softc *);
215 static int vxlan_ftable_update_locked(struct vxlan_softc *,
216 const struct sockaddr *, const uint8_t *,
217 struct rm_priotracker *);
218 static int vxlan_ftable_update(struct vxlan_softc *,
219 const struct sockaddr *, const uint8_t *);
220 static int vxlan_ftable_sysctl_dump(SYSCTL_HANDLER_ARGS);
221
222 static struct vxlan_ftable_entry *
223 vxlan_ftable_entry_alloc(void);
224 static void vxlan_ftable_entry_free(struct vxlan_ftable_entry *);
225 static void vxlan_ftable_entry_init(struct vxlan_softc *,
226 struct vxlan_ftable_entry *, const uint8_t *,
227 const struct sockaddr *, uint32_t);
228 static void vxlan_ftable_entry_destroy(struct vxlan_softc *,
229 struct vxlan_ftable_entry *);
230 static int vxlan_ftable_entry_insert(struct vxlan_softc *,
231 struct vxlan_ftable_entry *);
232 static struct vxlan_ftable_entry *
233 vxlan_ftable_entry_lookup(struct vxlan_softc *,
234 const uint8_t *);
235 static void vxlan_ftable_entry_dump(struct vxlan_ftable_entry *,
236 struct sbuf *);
237
238 static struct vxlan_socket *
239 vxlan_socket_alloc(const union vxlan_sockaddr *);
240 static void vxlan_socket_destroy(struct vxlan_socket *);
241 static void vxlan_socket_release(struct vxlan_socket *);
242 static struct vxlan_socket *
243 vxlan_socket_lookup(union vxlan_sockaddr *vxlsa);
244 static void vxlan_socket_insert(struct vxlan_socket *);
245 static int vxlan_socket_init(struct vxlan_socket *, struct ifnet *);
246 static int vxlan_socket_bind(struct vxlan_socket *, struct ifnet *);
247 static int vxlan_socket_create(struct ifnet *, int,
248 const union vxlan_sockaddr *, struct vxlan_socket **);
249 static void vxlan_socket_ifdetach(struct vxlan_socket *,
250 struct ifnet *, struct vxlan_softc_head *);
251
252 static struct vxlan_socket *
253 vxlan_socket_mc_lookup(const union vxlan_sockaddr *);
254 static int vxlan_sockaddr_mc_info_match(
255 const struct vxlan_socket_mc_info *,
256 const union vxlan_sockaddr *,
257 const union vxlan_sockaddr *, int);
258 static int vxlan_socket_mc_join_group(struct vxlan_socket *,
259 const union vxlan_sockaddr *, const union vxlan_sockaddr *,
260 int *, union vxlan_sockaddr *);
261 static int vxlan_socket_mc_leave_group(struct vxlan_socket *,
262 const union vxlan_sockaddr *,
263 const union vxlan_sockaddr *, int);
264 static int vxlan_socket_mc_add_group(struct vxlan_socket *,
265 const union vxlan_sockaddr *, const union vxlan_sockaddr *,
266 int, int *);
267 static void vxlan_socket_mc_release_group_by_idx(struct vxlan_socket *,
268 int);
269
270 static struct vxlan_softc *
271 vxlan_socket_lookup_softc_locked(struct vxlan_socket *,
272 uint32_t);
273 static struct vxlan_softc *
274 vxlan_socket_lookup_softc(struct vxlan_socket *, uint32_t);
275 static int vxlan_socket_insert_softc(struct vxlan_socket *,
276 struct vxlan_softc *);
277 static void vxlan_socket_remove_softc(struct vxlan_socket *,
278 struct vxlan_softc *);
279
280 static struct ifnet *
281 vxlan_multicast_if_ref(struct vxlan_softc *, int);
282 static void vxlan_free_multicast(struct vxlan_softc *);
283 static int vxlan_setup_multicast_interface(struct vxlan_softc *);
284
285 static int vxlan_setup_multicast(struct vxlan_softc *);
286 static int vxlan_setup_socket(struct vxlan_softc *);
287 static void vxlan_setup_interface(struct vxlan_softc *);
288 static int vxlan_valid_init_config(struct vxlan_softc *);
289 static void vxlan_init_wait(struct vxlan_softc *);
290 static void vxlan_init_complete(struct vxlan_softc *);
291 static void vxlan_init(void *);
292 static void vxlan_release(struct vxlan_softc *);
293 static void vxlan_teardown_wait(struct vxlan_softc *);
294 static void vxlan_teardown_complete(struct vxlan_softc *);
295 static void vxlan_teardown_locked(struct vxlan_softc *);
296 static void vxlan_teardown(struct vxlan_softc *);
297 static void vxlan_ifdetach(struct vxlan_softc *, struct ifnet *,
298 struct vxlan_softc_head *);
299 static void vxlan_timer(void *);
300
301 static int vxlan_ctrl_get_config(struct vxlan_softc *, void *);
302 static int vxlan_ctrl_set_vni(struct vxlan_softc *, void *);
303 static int vxlan_ctrl_set_local_addr(struct vxlan_softc *, void *);
304 static int vxlan_ctrl_set_remote_addr(struct vxlan_softc *, void *);
305 static int vxlan_ctrl_set_local_port(struct vxlan_softc *, void *);
306 static int vxlan_ctrl_set_remote_port(struct vxlan_softc *, void *);
307 static int vxlan_ctrl_set_port_range(struct vxlan_softc *, void *);
308 static int vxlan_ctrl_set_ftable_timeout(struct vxlan_softc *, void *);
309 static int vxlan_ctrl_set_ftable_max(struct vxlan_softc *, void *);
310 static int vxlan_ctrl_set_multicast_if(struct vxlan_softc * , void *);
311 static int vxlan_ctrl_set_ttl(struct vxlan_softc *, void *);
312 static int vxlan_ctrl_set_learn(struct vxlan_softc *, void *);
313 static int vxlan_ctrl_ftable_entry_add(struct vxlan_softc *, void *);
314 static int vxlan_ctrl_ftable_entry_rem(struct vxlan_softc *, void *);
315 static int vxlan_ctrl_flush(struct vxlan_softc *, void *);
316 static int vxlan_ioctl_drvspec(struct vxlan_softc *,
317 struct ifdrv *, int);
318 static int vxlan_ioctl_ifflags(struct vxlan_softc *);
319 static int vxlan_ioctl(struct ifnet *, u_long, caddr_t);
320
321 #if defined(INET) || defined(INET6)
322 static uint16_t vxlan_pick_source_port(struct vxlan_softc *, struct mbuf *);
323 static void vxlan_encap_header(struct vxlan_softc *, struct mbuf *,
324 int, uint16_t, uint16_t);
325 #endif
326 static int vxlan_encap4(struct vxlan_softc *,
327 const union vxlan_sockaddr *, struct mbuf *);
328 static int vxlan_encap6(struct vxlan_softc *,
329 const union vxlan_sockaddr *, struct mbuf *);
330 static int vxlan_transmit(struct ifnet *, struct mbuf *);
331 static void vxlan_qflush(struct ifnet *);
332 static void vxlan_rcv_udp_packet(struct mbuf *, int, struct inpcb *,
333 const struct sockaddr *, void *);
334 static int vxlan_input(struct vxlan_socket *, uint32_t, struct mbuf **,
335 const struct sockaddr *);
336
337 static void vxlan_set_default_config(struct vxlan_softc *);
338 static int vxlan_set_user_config(struct vxlan_softc *,
339 struct ifvxlanparam *);
340 static int vxlan_clone_create(struct if_clone *, int, caddr_t);
341 static void vxlan_clone_destroy(struct ifnet *);
342
343 static uint32_t vxlan_mac_hash(struct vxlan_softc *, const uint8_t *);
344 static void vxlan_fakeaddr(struct vxlan_softc *);
345
346 static int vxlan_sockaddr_cmp(const union vxlan_sockaddr *,
347 const struct sockaddr *);
348 static void vxlan_sockaddr_copy(union vxlan_sockaddr *,
349 const struct sockaddr *);
350 static int vxlan_sockaddr_in_equal(const union vxlan_sockaddr *,
351 const struct sockaddr *);
352 static void vxlan_sockaddr_in_copy(union vxlan_sockaddr *,
353 const struct sockaddr *);
354 static int vxlan_sockaddr_supported(const union vxlan_sockaddr *, int);
355 static int vxlan_sockaddr_in_any(const union vxlan_sockaddr *);
356 static int vxlan_sockaddr_in_multicast(const union vxlan_sockaddr *);
357
358 static int vxlan_can_change_config(struct vxlan_softc *);
359 static int vxlan_check_vni(uint32_t);
360 static int vxlan_check_ttl(int);
361 static int vxlan_check_ftable_timeout(uint32_t);
362 static int vxlan_check_ftable_max(uint32_t);
363
364 static void vxlan_sysctl_setup(struct vxlan_softc *);
365 static void vxlan_sysctl_destroy(struct vxlan_softc *);
366 static int vxlan_tunable_int(struct vxlan_softc *, const char *, int);
367
368 static void vxlan_ifdetach_event(void *, struct ifnet *);
369 static void vxlan_load(void);
370 static void vxlan_unload(void);
371 static int vxlan_modevent(module_t, int, void *);
372
373 static const char vxlan_name[] = "vxlan";
374 static MALLOC_DEFINE(M_VXLAN, vxlan_name,
375 "Virtual eXtensible LAN Interface");
376 static struct if_clone *vxlan_cloner;
377 static struct mtx vxlan_list_mtx;
378 static LIST_HEAD(, vxlan_socket) vxlan_socket_list;
379
380 static eventhandler_tag vxlan_ifdetach_event_tag;
381
382 SYSCTL_DECL(_net_link);
383 SYSCTL_NODE(_net_link, OID_AUTO, vxlan, CTLFLAG_RW, 0,
384 "Virtual eXtensible Local Area Network");
385
386 static int vxlan_legacy_port = 0;
387 TUNABLE_INT("net.link.vxlan.legacy_port", &vxlan_legacy_port);
388 static int vxlan_reuse_port = 0;
389 TUNABLE_INT("net.link.vxlan.reuse_port", &vxlan_reuse_port);
390
391 /* Default maximum number of addresses in the forwarding table. */
392 #ifndef VXLAN_FTABLE_MAX
393 #define VXLAN_FTABLE_MAX 2000
394 #endif
395
396 /* Timeout (in seconds) of addresses learned in the forwarding table. */
397 #ifndef VXLAN_FTABLE_TIMEOUT
398 #define VXLAN_FTABLE_TIMEOUT (20 * 60)
399 #endif
400
401 /*
402 * Maximum timeout (in seconds) of addresses learned in the forwarding
403 * table.
404 */
405 #ifndef VXLAN_FTABLE_MAX_TIMEOUT
406 #define VXLAN_FTABLE_MAX_TIMEOUT (60 * 60 * 24)
407 #endif
408
409 /* Number of seconds between pruning attempts of the forwarding table. */
410 #ifndef VXLAN_FTABLE_PRUNE
411 #define VXLAN_FTABLE_PRUNE (5 * 60)
412 #endif
413
414 static int vxlan_ftable_prune_period = VXLAN_FTABLE_PRUNE;
415
416 struct vxlan_control {
417 int (*vxlc_func)(struct vxlan_softc *, void *);
418 int vxlc_argsize;
419 int vxlc_flags;
420 #define VXLAN_CTRL_FLAG_COPYIN 0x01
421 #define VXLAN_CTRL_FLAG_COPYOUT 0x02
422 #define VXLAN_CTRL_FLAG_SUSER 0x04
423 };
424
425 static const struct vxlan_control vxlan_control_table[] = {
426 [VXLAN_CMD_GET_CONFIG] =
427 { vxlan_ctrl_get_config, sizeof(struct ifvxlancfg),
428 VXLAN_CTRL_FLAG_COPYOUT
429 },
430
431 [VXLAN_CMD_SET_VNI] =
432 { vxlan_ctrl_set_vni, sizeof(struct ifvxlancmd),
433 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER,
434 },
435
436 [VXLAN_CMD_SET_LOCAL_ADDR] =
437 { vxlan_ctrl_set_local_addr, sizeof(struct ifvxlancmd),
438 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER,
439 },
440
441 [VXLAN_CMD_SET_REMOTE_ADDR] =
442 { vxlan_ctrl_set_remote_addr, sizeof(struct ifvxlancmd),
443 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER,
444 },
445
446 [VXLAN_CMD_SET_LOCAL_PORT] =
447 { vxlan_ctrl_set_local_port, sizeof(struct ifvxlancmd),
448 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER,
449 },
450
451 [VXLAN_CMD_SET_REMOTE_PORT] =
452 { vxlan_ctrl_set_remote_port, sizeof(struct ifvxlancmd),
453 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER,
454 },
455
456 [VXLAN_CMD_SET_PORT_RANGE] =
457 { vxlan_ctrl_set_port_range, sizeof(struct ifvxlancmd),
458 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER,
459 },
460
461 [VXLAN_CMD_SET_FTABLE_TIMEOUT] =
462 { vxlan_ctrl_set_ftable_timeout, sizeof(struct ifvxlancmd),
463 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER,
464 },
465
466 [VXLAN_CMD_SET_FTABLE_MAX] =
467 { vxlan_ctrl_set_ftable_max, sizeof(struct ifvxlancmd),
468 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER,
469 },
470
471 [VXLAN_CMD_SET_MULTICAST_IF] =
472 { vxlan_ctrl_set_multicast_if, sizeof(struct ifvxlancmd),
473 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER,
474 },
475
476 [VXLAN_CMD_SET_TTL] =
477 { vxlan_ctrl_set_ttl, sizeof(struct ifvxlancmd),
478 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER,
479 },
480
481 [VXLAN_CMD_SET_LEARN] =
482 { vxlan_ctrl_set_learn, sizeof(struct ifvxlancmd),
483 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER,
484 },
485
486 [VXLAN_CMD_FTABLE_ENTRY_ADD] =
487 { vxlan_ctrl_ftable_entry_add, sizeof(struct ifvxlancmd),
488 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER,
489 },
490
491 [VXLAN_CMD_FTABLE_ENTRY_REM] =
492 { vxlan_ctrl_ftable_entry_rem, sizeof(struct ifvxlancmd),
493 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER,
494 },
495
496 [VXLAN_CMD_FLUSH] =
497 { vxlan_ctrl_flush, sizeof(struct ifvxlancmd),
498 VXLAN_CTRL_FLAG_COPYIN | VXLAN_CTRL_FLAG_SUSER,
499 },
500 };
501
502 static const int vxlan_control_table_size = nitems(vxlan_control_table);
503
504 static int
505 vxlan_ftable_addr_cmp(const uint8_t *a, const uint8_t *b)
506 {
507 int i, d;
508
509 for (i = 0, d = 0; i < ETHER_ADDR_LEN && d == 0; i++)
510 d = ((int)a[i]) - ((int)b[i]);
511
512 return (d);
513 }
514
515 static void
516 vxlan_ftable_init(struct vxlan_softc *sc)
517 {
518 int i;
519
520 sc->vxl_ftable = malloc(sizeof(struct vxlan_ftable_head) *
521 VXLAN_SC_FTABLE_SIZE, M_VXLAN, M_ZERO | M_WAITOK);
522
523 for (i = 0; i < VXLAN_SC_FTABLE_SIZE; i++)
524 LIST_INIT(&sc->vxl_ftable[i]);
525 sc->vxl_ftable_hash_key = arc4random();
526 }
527
528 static void
529 vxlan_ftable_fini(struct vxlan_softc *sc)
530 {
531 int i;
532
533 for (i = 0; i < VXLAN_SC_FTABLE_SIZE; i++) {
534 KASSERT(LIST_EMPTY(&sc->vxl_ftable[i]),
535 ("%s: vxlan %p ftable[%d] not empty", __func__, sc, i));
536 }
537 MPASS(sc->vxl_ftable_cnt == 0);
538
539 free(sc->vxl_ftable, M_VXLAN);
540 sc->vxl_ftable = NULL;
541 }
542
543 static void
544 vxlan_ftable_flush(struct vxlan_softc *sc, int all)
545 {
546 struct vxlan_ftable_entry *fe, *tfe;
547 int i;
548
549 for (i = 0; i < VXLAN_SC_FTABLE_SIZE; i++) {
550 LIST_FOREACH_SAFE(fe, &sc->vxl_ftable[i], vxlfe_hash, tfe) {
551 if (all || VXLAN_FE_IS_DYNAMIC(fe))
552 vxlan_ftable_entry_destroy(sc, fe);
553 }
554 }
555 }
556
557 static void
558 vxlan_ftable_expire(struct vxlan_softc *sc)
559 {
560 struct vxlan_ftable_entry *fe, *tfe;
561 int i;
562
563 VXLAN_LOCK_WASSERT(sc);
564
565 for (i = 0; i < VXLAN_SC_FTABLE_SIZE; i++) {
566 LIST_FOREACH_SAFE(fe, &sc->vxl_ftable[i], vxlfe_hash, tfe) {
567 if (VXLAN_FE_IS_DYNAMIC(fe) &&
568 time_uptime >= fe->vxlfe_expire)
569 vxlan_ftable_entry_destroy(sc, fe);
570 }
571 }
572 }
573
574 static int
575 vxlan_ftable_update_locked(struct vxlan_softc *sc, const struct sockaddr *sa,
576 const uint8_t *mac, struct rm_priotracker *tracker)
577 {
578 union vxlan_sockaddr vxlsa;
579 struct vxlan_ftable_entry *fe;
580 int error;
581
582 VXLAN_LOCK_ASSERT(sc);
583
584 again:
585 /*
586 * A forwarding entry for this MAC address might already exist. If
587 * so, update it, otherwise create a new one. We may have to upgrade
588 * the lock if we have to change or create an entry.
589 */
590 fe = vxlan_ftable_entry_lookup(sc, mac);
591 if (fe != NULL) {
592 fe->vxlfe_expire = time_uptime + sc->vxl_ftable_timeout;
593
594 if (!VXLAN_FE_IS_DYNAMIC(fe) ||
595 vxlan_sockaddr_in_equal(&fe->vxlfe_raddr, sa))
596 return (0);
597 if (!VXLAN_LOCK_WOWNED(sc)) {
598 VXLAN_RUNLOCK(sc, tracker);
599 VXLAN_WLOCK(sc);
600 sc->vxl_stats.ftable_lock_upgrade_failed++;
601 goto again;
602 }
603 vxlan_sockaddr_in_copy(&fe->vxlfe_raddr, sa);
604 return (0);
605 }
606
607 if (!VXLAN_LOCK_WOWNED(sc)) {
608 VXLAN_RUNLOCK(sc, tracker);
609 VXLAN_WLOCK(sc);
610 sc->vxl_stats.ftable_lock_upgrade_failed++;
611 goto again;
612 }
613
614 if (sc->vxl_ftable_cnt >= sc->vxl_ftable_max) {
615 sc->vxl_stats.ftable_nospace++;
616 return (ENOSPC);
617 }
618
619 fe = vxlan_ftable_entry_alloc();
620 if (fe == NULL)
621 return (ENOMEM);
622
623 /*
624 * The source port may be randomly select by the remove host, so
625 * use the port of the default destination address.
626 */
627 vxlan_sockaddr_copy(&vxlsa, sa);
628 vxlsa.in4.sin_port = sc->vxl_dst_addr.in4.sin_port;
629
630 vxlan_ftable_entry_init(sc, fe, mac, &vxlsa.sa,
631 VXLAN_FE_FLAG_DYNAMIC);
632
633 /* The prior lookup failed, so the insert should not. */
634 error = vxlan_ftable_entry_insert(sc, fe);
635 MPASS(error == 0);
636
637 return (0);
638 }
639
640 static int
641 vxlan_ftable_update(struct vxlan_softc *sc, const struct sockaddr *sa,
642 const uint8_t *mac)
643 {
644 struct rm_priotracker tracker;
645 int error;
646
647 VXLAN_RLOCK(sc, &tracker);
648 error = vxlan_ftable_update_locked(sc, sa, mac, &tracker);
649 VXLAN_UNLOCK(sc, &tracker);
650
651 return (error);
652 }
653
654 static int
655 vxlan_ftable_sysctl_dump(SYSCTL_HANDLER_ARGS)
656 {
657 struct rm_priotracker tracker;
658 struct sbuf sb;
659 struct vxlan_softc *sc;
660 struct vxlan_ftable_entry *fe;
661 size_t size;
662 int i, error;
663
664 /*
665 * This is mostly intended for debugging during development. It is
666 * not practical to dump an entire large table this way.
667 */
668
669 sc = arg1;
670 size = PAGE_SIZE; /* Calculate later. */
671
672 sbuf_new(&sb, NULL, size, SBUF_FIXEDLEN);
673 sbuf_putc(&sb, '\n');
674
675 VXLAN_RLOCK(sc, &tracker);
676 for (i = 0; i < VXLAN_SC_FTABLE_SIZE; i++) {
677 LIST_FOREACH(fe, &sc->vxl_ftable[i], vxlfe_hash) {
678 if (sbuf_error(&sb) != 0)
679 break;
680 vxlan_ftable_entry_dump(fe, &sb);
681 }
682 }
683 VXLAN_RUNLOCK(sc, &tracker);
684
685 if (sbuf_len(&sb) == 1)
686 sbuf_setpos(&sb, 0);
687
688 sbuf_finish(&sb);
689 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
690 sbuf_delete(&sb);
691
692 return (error);
693 }
694
695 static struct vxlan_ftable_entry *
696 vxlan_ftable_entry_alloc(void)
697 {
698 struct vxlan_ftable_entry *fe;
699
700 fe = malloc(sizeof(*fe), M_VXLAN, M_ZERO | M_NOWAIT);
701
702 return (fe);
703 }
704
705 static void
706 vxlan_ftable_entry_free(struct vxlan_ftable_entry *fe)
707 {
708
709 free(fe, M_VXLAN);
710 }
711
712 static void
713 vxlan_ftable_entry_init(struct vxlan_softc *sc, struct vxlan_ftable_entry *fe,
714 const uint8_t *mac, const struct sockaddr *sa, uint32_t flags)
715 {
716
717 fe->vxlfe_flags = flags;
718 fe->vxlfe_expire = time_uptime + sc->vxl_ftable_timeout;
719 memcpy(fe->vxlfe_mac, mac, ETHER_ADDR_LEN);
720 vxlan_sockaddr_copy(&fe->vxlfe_raddr, sa);
721 }
722
723 static void
724 vxlan_ftable_entry_destroy(struct vxlan_softc *sc,
725 struct vxlan_ftable_entry *fe)
726 {
727
728 sc->vxl_ftable_cnt--;
729 LIST_REMOVE(fe, vxlfe_hash);
730 vxlan_ftable_entry_free(fe);
731 }
732
733 static int
734 vxlan_ftable_entry_insert(struct vxlan_softc *sc,
735 struct vxlan_ftable_entry *fe)
736 {
737 struct vxlan_ftable_entry *lfe;
738 uint32_t hash;
739 int dir;
740
741 VXLAN_LOCK_WASSERT(sc);
742 hash = VXLAN_SC_FTABLE_HASH(sc, fe->vxlfe_mac);
743
744 lfe = LIST_FIRST(&sc->vxl_ftable[hash]);
745 if (lfe == NULL) {
746 LIST_INSERT_HEAD(&sc->vxl_ftable[hash], fe, vxlfe_hash);
747 goto out;
748 }
749
750 do {
751 dir = vxlan_ftable_addr_cmp(fe->vxlfe_mac, lfe->vxlfe_mac);
752 if (dir == 0)
753 return (EEXIST);
754 if (dir > 0) {
755 LIST_INSERT_BEFORE(lfe, fe, vxlfe_hash);
756 goto out;
757 } else if (LIST_NEXT(lfe, vxlfe_hash) == NULL) {
758 LIST_INSERT_AFTER(lfe, fe, vxlfe_hash);
759 goto out;
760 } else
761 lfe = LIST_NEXT(lfe, vxlfe_hash);
762 } while (lfe != NULL);
763
764 out:
765 sc->vxl_ftable_cnt++;
766
767 return (0);
768 }
769
770 static struct vxlan_ftable_entry *
771 vxlan_ftable_entry_lookup(struct vxlan_softc *sc, const uint8_t *mac)
772 {
773 struct vxlan_ftable_entry *fe;
774 uint32_t hash;
775 int dir;
776
777 VXLAN_LOCK_ASSERT(sc);
778 hash = VXLAN_SC_FTABLE_HASH(sc, mac);
779
780 LIST_FOREACH(fe, &sc->vxl_ftable[hash], vxlfe_hash) {
781 dir = vxlan_ftable_addr_cmp(fe->vxlfe_mac, mac);
782 if (dir == 0)
783 return (fe);
784 if (dir > 0)
785 break;
786 }
787
788 return (NULL);
789 }
790
791 static void
792 vxlan_ftable_entry_dump(struct vxlan_ftable_entry *fe, struct sbuf *sb)
793 {
794 char buf[64];
795 const union vxlan_sockaddr *sa;
796 const void *addr;
797 int i, len, af, width;
798
799 sa = &fe->vxlfe_raddr;
800 af = sa->sa.sa_family;
801 len = sbuf_len(sb);
802
803 sbuf_printf(sb, "%c 0x%02X ", VXLAN_FE_IS_DYNAMIC(fe) ? 'D' : 'S',
804 fe->vxlfe_flags);
805
806 for (i = 0; i < ETHER_ADDR_LEN - 1; i++)
807 sbuf_printf(sb, "%02X:", fe->vxlfe_mac[i]);
808 sbuf_printf(sb, "%02X ", fe->vxlfe_mac[i]);
809
810 if (af == AF_INET) {
811 addr = &sa->in4.sin_addr;
812 width = INET_ADDRSTRLEN - 1;
813 } else {
814 addr = &sa->in6.sin6_addr;
815 width = INET6_ADDRSTRLEN - 1;
816 }
817 inet_ntop(af, addr, buf, sizeof(buf));
818 sbuf_printf(sb, "%*s ", width, buf);
819
820 sbuf_printf(sb, "%08jd", (intmax_t)fe->vxlfe_expire);
821
822 sbuf_putc(sb, '\n');
823
824 /* Truncate a partial line. */
825 if (sbuf_error(sb) != 0)
826 sbuf_setpos(sb, len);
827 }
828
829 static struct vxlan_socket *
830 vxlan_socket_alloc(const union vxlan_sockaddr *sa)
831 {
832 struct vxlan_socket *vso;
833 int i;
834
835 vso = malloc(sizeof(*vso), M_VXLAN, M_WAITOK | M_ZERO);
836 rm_init(&vso->vxlso_lock, "vxlansorm");
837 refcount_init(&vso->vxlso_refcnt, 0);
838 for (i = 0; i < VXLAN_SO_VNI_HASH_SIZE; i++)
839 LIST_INIT(&vso->vxlso_vni_hash[i]);
840 vso->vxlso_laddr = *sa;
841
842 return (vso);
843 }
844
845 static void
846 vxlan_socket_destroy(struct vxlan_socket *vso)
847 {
848 struct socket *so;
849 struct vxlan_socket_mc_info *mc;
850 int i;
851
852 for (i = 0; i < VXLAN_SO_MC_MAX_GROUPS; i++) {
853 mc = &vso->vxlso_mc[i];
854 KASSERT(mc->vxlsomc_gaddr.sa.sa_family == AF_UNSPEC,
855 ("%s: socket %p mc[%d] still has address",
856 __func__, vso, i));
857 }
858
859 for (i = 0; i < VXLAN_SO_VNI_HASH_SIZE; i++) {
860 KASSERT(LIST_EMPTY(&vso->vxlso_vni_hash[i]),
861 ("%s: socket %p vni_hash[%d] not empty",
862 __func__, vso, i));
863 }
864
865 so = vso->vxlso_sock;
866 if (so != NULL) {
867 vso->vxlso_sock = NULL;
868 soclose(so);
869 }
870
871 rm_destroy(&vso->vxlso_lock);
872 free(vso, M_VXLAN);
873 }
874
875 static void
876 vxlan_socket_release(struct vxlan_socket *vso)
877 {
878 int destroy;
879
880 mtx_lock(&vxlan_list_mtx);
881 destroy = VXLAN_SO_RELEASE(vso);
882 if (destroy != 0)
883 LIST_REMOVE(vso, vxlso_entry);
884 mtx_unlock(&vxlan_list_mtx);
885
886 if (destroy != 0)
887 vxlan_socket_destroy(vso);
888 }
889
890 static struct vxlan_socket *
891 vxlan_socket_lookup(union vxlan_sockaddr *vxlsa)
892 {
893 struct vxlan_socket *vso;
894
895 mtx_lock(&vxlan_list_mtx);
896 LIST_FOREACH(vso, &vxlan_socket_list, vxlso_entry) {
897 if (vxlan_sockaddr_cmp(&vso->vxlso_laddr, &vxlsa->sa) == 0) {
898 VXLAN_SO_ACQUIRE(vso);
899 break;
900 }
901 }
902 mtx_unlock(&vxlan_list_mtx);
903
904 return (vso);
905 }
906
907 static void
908 vxlan_socket_insert(struct vxlan_socket *vso)
909 {
910
911 mtx_lock(&vxlan_list_mtx);
912 VXLAN_SO_ACQUIRE(vso);
913 LIST_INSERT_HEAD(&vxlan_socket_list, vso, vxlso_entry);
914 mtx_unlock(&vxlan_list_mtx);
915 }
916
917 static int
918 vxlan_socket_init(struct vxlan_socket *vso, struct ifnet *ifp)
919 {
920 struct thread *td;
921 int error;
922
923 td = curthread;
924
925 error = socreate(vso->vxlso_laddr.sa.sa_family, &vso->vxlso_sock,
926 SOCK_DGRAM, IPPROTO_UDP, td->td_ucred, td);
927 if (error) {
928 if_printf(ifp, "cannot create socket: %d\n", error);
929 return (error);
930 }
931
932 error = udp_set_kernel_tunneling(vso->vxlso_sock,
933 vxlan_rcv_udp_packet, NULL, vso);
934 if (error) {
935 if_printf(ifp, "cannot set tunneling function: %d\n", error);
936 return (error);
937 }
938
939 if (vxlan_reuse_port != 0) {
940 struct sockopt sopt;
941 int val = 1;
942
943 bzero(&sopt, sizeof(sopt));
944 sopt.sopt_dir = SOPT_SET;
945 sopt.sopt_level = IPPROTO_IP;
946 sopt.sopt_name = SO_REUSEPORT;
947 sopt.sopt_val = &val;
948 sopt.sopt_valsize = sizeof(val);
949 error = sosetopt(vso->vxlso_sock, &sopt);
950 if (error) {
951 if_printf(ifp,
952 "cannot set REUSEADDR socket opt: %d\n", error);
953 return (error);
954 }
955 }
956
957 return (0);
958 }
959
960 static int
961 vxlan_socket_bind(struct vxlan_socket *vso, struct ifnet *ifp)
962 {
963 union vxlan_sockaddr laddr;
964 struct thread *td;
965 int error;
966
967 td = curthread;
968 laddr = vso->vxlso_laddr;
969
970 error = sobind(vso->vxlso_sock, &laddr.sa, td);
971 if (error) {
972 if (error != EADDRINUSE)
973 if_printf(ifp, "cannot bind socket: %d\n", error);
974 return (error);
975 }
976
977 return (0);
978 }
979
980 static int
981 vxlan_socket_create(struct ifnet *ifp, int multicast,
982 const union vxlan_sockaddr *saddr, struct vxlan_socket **vsop)
983 {
984 union vxlan_sockaddr laddr;
985 struct vxlan_socket *vso;
986 int error;
987
988 laddr = *saddr;
989
990 /*
991 * If this socket will be multicast, then only the local port
992 * must be specified when binding.
993 */
994 if (multicast != 0) {
995 if (VXLAN_SOCKADDR_IS_IPV4(&laddr))
996 laddr.in4.sin_addr.s_addr = INADDR_ANY;
997 #ifdef INET6
998 else
999 laddr.in6.sin6_addr = in6addr_any;
1000 #endif
1001 }
1002
1003 vso = vxlan_socket_alloc(&laddr);
1004 if (vso == NULL)
1005 return (ENOMEM);
1006
1007 error = vxlan_socket_init(vso, ifp);
1008 if (error)
1009 goto fail;
1010
1011 error = vxlan_socket_bind(vso, ifp);
1012 if (error)
1013 goto fail;
1014
1015 /*
1016 * There is a small window between the bind completing and
1017 * inserting the socket, so that a concurrent create may fail.
1018 * Let's not worry about that for now.
1019 */
1020 vxlan_socket_insert(vso);
1021 *vsop = vso;
1022
1023 return (0);
1024
1025 fail:
1026 vxlan_socket_destroy(vso);
1027
1028 return (error);
1029 }
1030
1031 static void
1032 vxlan_socket_ifdetach(struct vxlan_socket *vso, struct ifnet *ifp,
1033 struct vxlan_softc_head *list)
1034 {
1035 struct rm_priotracker tracker;
1036 struct vxlan_softc *sc;
1037 int i;
1038
1039 VXLAN_SO_RLOCK(vso, &tracker);
1040 for (i = 0; i < VXLAN_SO_VNI_HASH_SIZE; i++) {
1041 LIST_FOREACH(sc, &vso->vxlso_vni_hash[i], vxl_entry)
1042 vxlan_ifdetach(sc, ifp, list);
1043 }
1044 VXLAN_SO_RUNLOCK(vso, &tracker);
1045 }
1046
1047 static struct vxlan_socket *
1048 vxlan_socket_mc_lookup(const union vxlan_sockaddr *vxlsa)
1049 {
1050 struct vxlan_socket *vso;
1051 union vxlan_sockaddr laddr;
1052
1053 laddr = *vxlsa;
1054
1055 if (VXLAN_SOCKADDR_IS_IPV4(&laddr))
1056 laddr.in4.sin_addr.s_addr = INADDR_ANY;
1057 #ifdef INET6
1058 else
1059 laddr.in6.sin6_addr = in6addr_any;
1060 #endif
1061
1062 vso = vxlan_socket_lookup(&laddr);
1063
1064 return (vso);
1065 }
1066
1067 static int
1068 vxlan_sockaddr_mc_info_match(const struct vxlan_socket_mc_info *mc,
1069 const union vxlan_sockaddr *group, const union vxlan_sockaddr *local,
1070 int ifidx)
1071 {
1072
1073 if (!vxlan_sockaddr_in_any(local) &&
1074 !vxlan_sockaddr_in_equal(&mc->vxlsomc_saddr, &local->sa))
1075 return (0);
1076 if (!vxlan_sockaddr_in_equal(&mc->vxlsomc_gaddr, &group->sa))
1077 return (0);
1078 if (ifidx != 0 && ifidx != mc->vxlsomc_ifidx)
1079 return (0);
1080
1081 return (1);
1082 }
1083
1084 static int
1085 vxlan_socket_mc_join_group(struct vxlan_socket *vso,
1086 const union vxlan_sockaddr *group, const union vxlan_sockaddr *local,
1087 int *ifidx, union vxlan_sockaddr *source)
1088 {
1089 struct sockopt sopt;
1090 int error;
1091
1092 *source = *local;
1093
1094 if (VXLAN_SOCKADDR_IS_IPV4(group)) {
1095 struct ip_mreq mreq;
1096
1097 mreq.imr_multiaddr = group->in4.sin_addr;
1098 mreq.imr_interface = local->in4.sin_addr;
1099
1100 bzero(&sopt, sizeof(sopt));
1101 sopt.sopt_dir = SOPT_SET;
1102 sopt.sopt_level = IPPROTO_IP;
1103 sopt.sopt_name = IP_ADD_MEMBERSHIP;
1104 sopt.sopt_val = &mreq;
1105 sopt.sopt_valsize = sizeof(mreq);
1106 error = sosetopt(vso->vxlso_sock, &sopt);
1107 if (error)
1108 return (error);
1109
1110 /*
1111 * BMV: Ideally, there would be a formal way for us to get
1112 * the local interface that was selected based on the
1113 * imr_interface address. We could then update *ifidx so
1114 * vxlan_sockaddr_mc_info_match() would return a match for
1115 * later creates that explicitly set the multicast interface.
1116 *
1117 * If we really need to, we can of course look in the INP's
1118 * membership list:
1119 * sotoinpcb(vso->vxlso_sock)->inp_moptions->
1120 * imo_membership[]->inm_ifp
1121 * similarly to imo_match_group().
1122 */
1123 source->in4.sin_addr = local->in4.sin_addr;
1124
1125 } else if (VXLAN_SOCKADDR_IS_IPV6(group)) {
1126 struct ipv6_mreq mreq;
1127
1128 mreq.ipv6mr_multiaddr = group->in6.sin6_addr;
1129 mreq.ipv6mr_interface = *ifidx;
1130
1131 bzero(&sopt, sizeof(sopt));
1132 sopt.sopt_dir = SOPT_SET;
1133 sopt.sopt_level = IPPROTO_IPV6;
1134 sopt.sopt_name = IPV6_JOIN_GROUP;
1135 sopt.sopt_val = &mreq;
1136 sopt.sopt_valsize = sizeof(mreq);
1137 error = sosetopt(vso->vxlso_sock, &sopt);
1138 if (error)
1139 return (error);
1140
1141 /*
1142 * BMV: As with IPv4, we would really like to know what
1143 * interface in6p_lookup_mcast_ifp() selected.
1144 */
1145 } else
1146 error = EAFNOSUPPORT;
1147
1148 return (error);
1149 }
1150
1151 static int
1152 vxlan_socket_mc_leave_group(struct vxlan_socket *vso,
1153 const union vxlan_sockaddr *group, const union vxlan_sockaddr *source,
1154 int ifidx)
1155 {
1156 struct sockopt sopt;
1157 int error;
1158
1159 bzero(&sopt, sizeof(sopt));
1160 sopt.sopt_dir = SOPT_SET;
1161
1162 if (VXLAN_SOCKADDR_IS_IPV4(group)) {
1163 struct ip_mreq mreq;
1164
1165 mreq.imr_multiaddr = group->in4.sin_addr;
1166 mreq.imr_interface = source->in4.sin_addr;
1167
1168 sopt.sopt_level = IPPROTO_IP;
1169 sopt.sopt_name = IP_DROP_MEMBERSHIP;
1170 sopt.sopt_val = &mreq;
1171 sopt.sopt_valsize = sizeof(mreq);
1172 error = sosetopt(vso->vxlso_sock, &sopt);
1173
1174 } else if (VXLAN_SOCKADDR_IS_IPV6(group)) {
1175 struct ipv6_mreq mreq;
1176
1177 mreq.ipv6mr_multiaddr = group->in6.sin6_addr;
1178 mreq.ipv6mr_interface = ifidx;
1179
1180 sopt.sopt_level = IPPROTO_IPV6;
1181 sopt.sopt_name = IPV6_LEAVE_GROUP;
1182 sopt.sopt_val = &mreq;
1183 sopt.sopt_valsize = sizeof(mreq);
1184 error = sosetopt(vso->vxlso_sock, &sopt);
1185
1186 } else
1187 error = EAFNOSUPPORT;
1188
1189 return (error);
1190 }
1191
1192 static int
1193 vxlan_socket_mc_add_group(struct vxlan_socket *vso,
1194 const union vxlan_sockaddr *group, const union vxlan_sockaddr *local,
1195 int ifidx, int *idx)
1196 {
1197 union vxlan_sockaddr source;
1198 struct vxlan_socket_mc_info *mc;
1199 int i, empty, error;
1200
1201 /*
1202 * Within a socket, the same multicast group may be used by multiple
1203 * interfaces, each with a different network identifier. But a socket
1204 * may only join a multicast group once, so keep track of the users
1205 * here.
1206 */
1207
1208 VXLAN_SO_WLOCK(vso);
1209 for (empty = 0, i = 0; i < VXLAN_SO_MC_MAX_GROUPS; i++) {
1210 mc = &vso->vxlso_mc[i];
1211
1212 if (mc->vxlsomc_gaddr.sa.sa_family == AF_UNSPEC) {
1213 empty++;
1214 continue;
1215 }
1216
1217 if (vxlan_sockaddr_mc_info_match(mc, group, local, ifidx))
1218 goto out;
1219 }
1220 VXLAN_SO_WUNLOCK(vso);
1221
1222 if (empty == 0)
1223 return (ENOSPC);
1224
1225 error = vxlan_socket_mc_join_group(vso, group, local, &ifidx, &source);
1226 if (error)
1227 return (error);
1228
1229 VXLAN_SO_WLOCK(vso);
1230 for (i = 0; i < VXLAN_SO_MC_MAX_GROUPS; i++) {
1231 mc = &vso->vxlso_mc[i];
1232
1233 if (mc->vxlsomc_gaddr.sa.sa_family == AF_UNSPEC) {
1234 vxlan_sockaddr_copy(&mc->vxlsomc_gaddr, &group->sa);
1235 vxlan_sockaddr_copy(&mc->vxlsomc_saddr, &source.sa);
1236 mc->vxlsomc_ifidx = ifidx;
1237 goto out;
1238 }
1239 }
1240 VXLAN_SO_WUNLOCK(vso);
1241
1242 error = vxlan_socket_mc_leave_group(vso, group, &source, ifidx);
1243 MPASS(error == 0);
1244
1245 return (ENOSPC);
1246
1247 out:
1248 mc->vxlsomc_users++;
1249 VXLAN_SO_WUNLOCK(vso);
1250
1251 *idx = i;
1252
1253 return (0);
1254 }
1255
1256 static void
1257 vxlan_socket_mc_release_group_by_idx(struct vxlan_socket *vso, int idx)
1258 {
1259 union vxlan_sockaddr group, source;
1260 struct vxlan_socket_mc_info *mc;
1261 int ifidx, leave;
1262
1263 KASSERT(idx >= 0 && idx < VXLAN_SO_MC_MAX_GROUPS,
1264 ("%s: vso %p idx %d out of bounds", __func__, vso, idx));
1265
1266 leave = 0;
1267 mc = &vso->vxlso_mc[idx];
1268
1269 VXLAN_SO_WLOCK(vso);
1270 mc->vxlsomc_users--;
1271 if (mc->vxlsomc_users == 0) {
1272 group = mc->vxlsomc_gaddr;
1273 source = mc->vxlsomc_saddr;
1274 ifidx = mc->vxlsomc_ifidx;
1275 bzero(mc, sizeof(*mc));
1276 leave = 1;
1277 }
1278 VXLAN_SO_WUNLOCK(vso);
1279
1280 if (leave != 0) {
1281 /*
1282 * Our socket's membership in this group may have already
1283 * been removed if we joined through an interface that's
1284 * been detached.
1285 */
1286 vxlan_socket_mc_leave_group(vso, &group, &source, ifidx);
1287 }
1288 }
1289
1290 static struct vxlan_softc *
1291 vxlan_socket_lookup_softc_locked(struct vxlan_socket *vso, uint32_t vni)
1292 {
1293 struct vxlan_softc *sc;
1294 uint32_t hash;
1295
1296 VXLAN_SO_LOCK_ASSERT(vso);
1297 hash = VXLAN_SO_VNI_HASH(vni);
1298
1299 LIST_FOREACH(sc, &vso->vxlso_vni_hash[hash], vxl_entry) {
1300 if (sc->vxl_vni == vni) {
1301 VXLAN_ACQUIRE(sc);
1302 break;
1303 }
1304 }
1305
1306 return (sc);
1307 }
1308
1309 static struct vxlan_softc *
1310 vxlan_socket_lookup_softc(struct vxlan_socket *vso, uint32_t vni)
1311 {
1312 struct rm_priotracker tracker;
1313 struct vxlan_softc *sc;
1314
1315 VXLAN_SO_RLOCK(vso, &tracker);
1316 sc = vxlan_socket_lookup_softc_locked(vso, vni);
1317 VXLAN_SO_RUNLOCK(vso, &tracker);
1318
1319 return (sc);
1320 }
1321
1322 static int
1323 vxlan_socket_insert_softc(struct vxlan_socket *vso, struct vxlan_softc *sc)
1324 {
1325 struct vxlan_softc *tsc;
1326 uint32_t vni, hash;
1327
1328 vni = sc->vxl_vni;
1329 hash = VXLAN_SO_VNI_HASH(vni);
1330
1331 VXLAN_SO_WLOCK(vso);
1332 tsc = vxlan_socket_lookup_softc_locked(vso, vni);
1333 if (tsc != NULL) {
1334 VXLAN_SO_WUNLOCK(vso);
1335 vxlan_release(tsc);
1336 return (EEXIST);
1337 }
1338
1339 VXLAN_ACQUIRE(sc);
1340 LIST_INSERT_HEAD(&vso->vxlso_vni_hash[hash], sc, vxl_entry);
1341 VXLAN_SO_WUNLOCK(vso);
1342
1343 return (0);
1344 }
1345
1346 static void
1347 vxlan_socket_remove_softc(struct vxlan_socket *vso, struct vxlan_softc *sc)
1348 {
1349
1350 VXLAN_SO_WLOCK(vso);
1351 LIST_REMOVE(sc, vxl_entry);
1352 VXLAN_SO_WUNLOCK(vso);
1353
1354 vxlan_release(sc);
1355 }
1356
1357 static struct ifnet *
1358 vxlan_multicast_if_ref(struct vxlan_softc *sc, int ipv4)
1359 {
1360 struct ifnet *ifp;
1361
1362 VXLAN_LOCK_ASSERT(sc);
1363
1364 if (ipv4 && sc->vxl_im4o != NULL)
1365 ifp = sc->vxl_im4o->imo_multicast_ifp;
1366 else if (!ipv4 && sc->vxl_im6o != NULL)
1367 ifp = sc->vxl_im6o->im6o_multicast_ifp;
1368 else
1369 ifp = NULL;
1370
1371 if (ifp != NULL)
1372 if_ref(ifp);
1373
1374 return (ifp);
1375 }
1376
1377 static void
1378 vxlan_free_multicast(struct vxlan_softc *sc)
1379 {
1380
1381 if (sc->vxl_mc_ifp != NULL) {
1382 if_rele(sc->vxl_mc_ifp);
1383 sc->vxl_mc_ifp = NULL;
1384 sc->vxl_mc_ifindex = 0;
1385 }
1386
1387 if (sc->vxl_im4o != NULL) {
1388 free(sc->vxl_im4o, M_VXLAN);
1389 sc->vxl_im4o = NULL;
1390 }
1391
1392 if (sc->vxl_im6o != NULL) {
1393 free(sc->vxl_im6o, M_VXLAN);
1394 sc->vxl_im6o = NULL;
1395 }
1396 }
1397
1398 static int
1399 vxlan_setup_multicast_interface(struct vxlan_softc *sc)
1400 {
1401 struct ifnet *ifp;
1402
1403 ifp = ifunit_ref(sc->vxl_mc_ifname);
1404 if (ifp == NULL) {
1405 if_printf(sc->vxl_ifp, "multicast interfaces %s does "
1406 "not exist\n", sc->vxl_mc_ifname);
1407 return (ENOENT);
1408 }
1409
1410 if ((ifp->if_flags & IFF_MULTICAST) == 0) {
1411 if_printf(sc->vxl_ifp, "interface %s does not support "
1412 "multicast\n", sc->vxl_mc_ifname);
1413 if_rele(ifp);
1414 return (ENOTSUP);
1415 }
1416
1417 sc->vxl_mc_ifp = ifp;
1418 sc->vxl_mc_ifindex = ifp->if_index;
1419
1420 return (0);
1421 }
1422
1423 static int
1424 vxlan_setup_multicast(struct vxlan_softc *sc)
1425 {
1426 const union vxlan_sockaddr *group;
1427 int error;
1428
1429 group = &sc->vxl_dst_addr;
1430 error = 0;
1431
1432 if (sc->vxl_mc_ifname[0] != '\0') {
1433 error = vxlan_setup_multicast_interface(sc);
1434 if (error)
1435 return (error);
1436 }
1437
1438 /*
1439 * Initialize an multicast options structure that is sufficiently
1440 * populated for use in the respective IP output routine. This
1441 * structure is typically stored in the socket, but our sockets
1442 * may be shared among multiple interfaces.
1443 */
1444 if (VXLAN_SOCKADDR_IS_IPV4(group)) {
1445 sc->vxl_im4o = malloc(sizeof(struct ip_moptions), M_VXLAN,
1446 M_ZERO | M_WAITOK);
1447 sc->vxl_im4o->imo_multicast_ifp = sc->vxl_mc_ifp;
1448 sc->vxl_im4o->imo_multicast_ttl = sc->vxl_ttl;
1449 sc->vxl_im4o->imo_multicast_vif = -1;
1450 } else if (VXLAN_SOCKADDR_IS_IPV6(group)) {
1451 sc->vxl_im6o = malloc(sizeof(struct ip6_moptions), M_VXLAN,
1452 M_ZERO | M_WAITOK);
1453 sc->vxl_im6o->im6o_multicast_ifp = sc->vxl_mc_ifp;
1454 sc->vxl_im6o->im6o_multicast_hlim = sc->vxl_ttl;
1455 }
1456
1457 return (error);
1458 }
1459
1460 static int
1461 vxlan_setup_socket(struct vxlan_softc *sc)
1462 {
1463 struct vxlan_socket *vso;
1464 struct ifnet *ifp;
1465 union vxlan_sockaddr *saddr, *daddr;
1466 int multicast, error;
1467
1468 vso = NULL;
1469 ifp = sc->vxl_ifp;
1470 saddr = &sc->vxl_src_addr;
1471 daddr = &sc->vxl_dst_addr;
1472
1473 multicast = vxlan_sockaddr_in_multicast(daddr);
1474 MPASS(multicast != -1);
1475 sc->vxl_vso_mc_index = -1;
1476
1477 /*
1478 * Try to create the socket. If that fails, attempt to use an
1479 * existing socket.
1480 */
1481 error = vxlan_socket_create(ifp, multicast, saddr, &vso);
1482 if (error) {
1483 if (multicast != 0)
1484 vso = vxlan_socket_mc_lookup(saddr);
1485 else
1486 vso = vxlan_socket_lookup(saddr);
1487
1488 if (vso == NULL) {
1489 if_printf(ifp, "cannot create socket (error: %d), "
1490 "and no existing socket found\n", error);
1491 goto out;
1492 }
1493 }
1494
1495 if (multicast != 0) {
1496 error = vxlan_setup_multicast(sc);
1497 if (error)
1498 goto out;
1499
1500 error = vxlan_socket_mc_add_group(vso, daddr, saddr,
1501 sc->vxl_mc_ifindex, &sc->vxl_vso_mc_index);
1502 if (error)
1503 goto out;
1504 }
1505
1506 sc->vxl_sock = vso;
1507 error = vxlan_socket_insert_softc(vso, sc);
1508 if (error) {
1509 sc->vxl_sock = NULL;
1510 if_printf(ifp, "network identifier %d already exists in "
1511 "this socket\n", sc->vxl_vni);
1512 goto out;
1513 }
1514
1515 return (0);
1516
1517 out:
1518 if (vso != NULL) {
1519 if (sc->vxl_vso_mc_index != -1) {
1520 vxlan_socket_mc_release_group_by_idx(vso,
1521 sc->vxl_vso_mc_index);
1522 sc->vxl_vso_mc_index = -1;
1523 }
1524 if (multicast != 0)
1525 vxlan_free_multicast(sc);
1526 vxlan_socket_release(vso);
1527 }
1528
1529 return (error);
1530 }
1531
1532 static void
1533 vxlan_setup_interface(struct vxlan_softc *sc)
1534 {
1535 struct ifnet *ifp;
1536
1537 ifp = sc->vxl_ifp;
1538 ifp->if_hdrlen = ETHER_HDR_LEN + sizeof(struct vxlanudphdr);
1539
1540 if (VXLAN_SOCKADDR_IS_IPV4(&sc->vxl_dst_addr) != 0)
1541 ifp->if_hdrlen += sizeof(struct ip);
1542 else if (VXLAN_SOCKADDR_IS_IPV6(&sc->vxl_dst_addr) != 0)
1543 ifp->if_hdrlen += sizeof(struct ip6_hdr);
1544 }
1545
1546 static int
1547 vxlan_valid_init_config(struct vxlan_softc *sc)
1548 {
1549 const char *reason;
1550
1551 if (vxlan_check_vni(sc->vxl_vni) != 0) {
1552 reason = "invalid virtual network identifier specified";
1553 goto fail;
1554 }
1555
1556 if (vxlan_sockaddr_supported(&sc->vxl_src_addr, 1) == 0) {
1557 reason = "source address type is not supported";
1558 goto fail;
1559 }
1560
1561 if (vxlan_sockaddr_supported(&sc->vxl_dst_addr, 0) == 0) {
1562 reason = "destination address type is not supported";
1563 goto fail;
1564 }
1565
1566 if (vxlan_sockaddr_in_any(&sc->vxl_dst_addr) != 0) {
1567 reason = "no valid destination address specified";
1568 goto fail;
1569 }
1570
1571 if (vxlan_sockaddr_in_multicast(&sc->vxl_dst_addr) == 0 &&
1572 sc->vxl_mc_ifname[0] != '\0') {
1573 reason = "can only specify interface with a group address";
1574 goto fail;
1575 }
1576
1577 if (vxlan_sockaddr_in_any(&sc->vxl_src_addr) == 0) {
1578 if (VXLAN_SOCKADDR_IS_IPV4(&sc->vxl_src_addr) ^
1579 VXLAN_SOCKADDR_IS_IPV4(&sc->vxl_dst_addr)) {
1580 reason = "source and destination address must both "
1581 "be either IPv4 or IPv6";
1582 goto fail;
1583 }
1584 }
1585
1586 if (sc->vxl_src_addr.in4.sin_port == 0) {
1587 reason = "local port not specified";
1588 goto fail;
1589 }
1590
1591 if (sc->vxl_dst_addr.in4.sin_port == 0) {
1592 reason = "remote port not specified";
1593 goto fail;
1594 }
1595
1596 return (0);
1597
1598 fail:
1599 if_printf(sc->vxl_ifp, "cannot initialize interface: %s\n", reason);
1600 return (EINVAL);
1601 }
1602
1603 static void
1604 vxlan_init_wait(struct vxlan_softc *sc)
1605 {
1606
1607 VXLAN_LOCK_WASSERT(sc);
1608 while (sc->vxl_flags & VXLAN_FLAG_INIT)
1609 rm_sleep(sc, &sc->vxl_lock, 0, "vxlint", hz);
1610 }
1611
1612 static void
1613 vxlan_init_complete(struct vxlan_softc *sc)
1614 {
1615
1616 VXLAN_WLOCK(sc);
1617 sc->vxl_flags &= ~VXLAN_FLAG_INIT;
1618 wakeup(sc);
1619 VXLAN_WUNLOCK(sc);
1620 }
1621
1622 static void
1623 vxlan_init(void *xsc)
1624 {
1625 static const uint8_t empty_mac[ETHER_ADDR_LEN];
1626 struct vxlan_softc *sc;
1627 struct ifnet *ifp;
1628
1629 sc = xsc;
1630 ifp = sc->vxl_ifp;
1631
1632 VXLAN_WLOCK(sc);
1633 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
1634 VXLAN_WUNLOCK(sc);
1635 return;
1636 }
1637 sc->vxl_flags |= VXLAN_FLAG_INIT;
1638 VXLAN_WUNLOCK(sc);
1639
1640 if (vxlan_valid_init_config(sc) != 0)
1641 goto out;
1642
1643 vxlan_setup_interface(sc);
1644
1645 if (vxlan_setup_socket(sc) != 0)
1646 goto out;
1647
1648 /* Initialize the default forwarding entry. */
1649 vxlan_ftable_entry_init(sc, &sc->vxl_default_fe, empty_mac,
1650 &sc->vxl_dst_addr.sa, VXLAN_FE_FLAG_STATIC);
1651
1652 VXLAN_WLOCK(sc);
1653 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1654 callout_reset(&sc->vxl_callout, vxlan_ftable_prune_period * hz,
1655 vxlan_timer, sc);
1656 VXLAN_WUNLOCK(sc);
1657
1658 out:
1659 vxlan_init_complete(sc);
1660 }
1661
1662 static void
1663 vxlan_release(struct vxlan_softc *sc)
1664 {
1665
1666 /*
1667 * The softc may be destroyed as soon as we release our reference,
1668 * so we cannot serialize the wakeup with the softc lock. We use a
1669 * timeout in our sleeps so a missed wakeup is unfortunate but not
1670 * fatal.
1671 */
1672 if (VXLAN_RELEASE(sc) != 0)
1673 wakeup(sc);
1674 }
1675
1676 static void
1677 vxlan_teardown_wait(struct vxlan_softc *sc)
1678 {
1679
1680 VXLAN_LOCK_WASSERT(sc);
1681 while (sc->vxl_flags & VXLAN_FLAG_TEARDOWN)
1682 rm_sleep(sc, &sc->vxl_lock, 0, "vxltrn", hz);
1683 }
1684
1685 static void
1686 vxlan_teardown_complete(struct vxlan_softc *sc)
1687 {
1688
1689 VXLAN_WLOCK(sc);
1690 sc->vxl_flags &= ~VXLAN_FLAG_TEARDOWN;
1691 wakeup(sc);
1692 VXLAN_WUNLOCK(sc);
1693 }
1694
1695 static void
1696 vxlan_teardown_locked(struct vxlan_softc *sc)
1697 {
1698 struct ifnet *ifp;
1699 struct vxlan_socket *vso;
1700
1701 ifp = sc->vxl_ifp;
1702
1703 VXLAN_LOCK_WASSERT(sc);
1704 MPASS(sc->vxl_flags & VXLAN_FLAG_TEARDOWN);
1705
1706 ifp->if_flags &= ~IFF_UP;
1707 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1708 callout_stop(&sc->vxl_callout);
1709 vso = sc->vxl_sock;
1710 sc->vxl_sock = NULL;
1711
1712 VXLAN_WUNLOCK(sc);
1713
1714 if (vso != NULL) {
1715 vxlan_socket_remove_softc(vso, sc);
1716
1717 if (sc->vxl_vso_mc_index != -1) {
1718 vxlan_socket_mc_release_group_by_idx(vso,
1719 sc->vxl_vso_mc_index);
1720 sc->vxl_vso_mc_index = -1;
1721 }
1722 }
1723
1724 VXLAN_WLOCK(sc);
1725 while (sc->vxl_refcnt != 0)
1726 rm_sleep(sc, &sc->vxl_lock, 0, "vxldrn", hz);
1727 VXLAN_WUNLOCK(sc);
1728
1729 callout_drain(&sc->vxl_callout);
1730
1731 vxlan_free_multicast(sc);
1732 if (vso != NULL)
1733 vxlan_socket_release(vso);
1734
1735 vxlan_teardown_complete(sc);
1736 }
1737
1738 static void
1739 vxlan_teardown(struct vxlan_softc *sc)
1740 {
1741
1742 VXLAN_WLOCK(sc);
1743 if (sc->vxl_flags & VXLAN_FLAG_TEARDOWN) {
1744 vxlan_teardown_wait(sc);
1745 VXLAN_WUNLOCK(sc);
1746 return;
1747 }
1748
1749 sc->vxl_flags |= VXLAN_FLAG_TEARDOWN;
1750 vxlan_teardown_locked(sc);
1751 }
1752
1753 static void
1754 vxlan_ifdetach(struct vxlan_softc *sc, struct ifnet *ifp,
1755 struct vxlan_softc_head *list)
1756 {
1757
1758 VXLAN_WLOCK(sc);
1759
1760 if (sc->vxl_mc_ifp != ifp)
1761 goto out;
1762 if (sc->vxl_flags & VXLAN_FLAG_TEARDOWN)
1763 goto out;
1764
1765 sc->vxl_flags |= VXLAN_FLAG_TEARDOWN;
1766 LIST_INSERT_HEAD(list, sc, vxl_ifdetach_list);
1767
1768 out:
1769 VXLAN_WUNLOCK(sc);
1770 }
1771
1772 static void
1773 vxlan_timer(void *xsc)
1774 {
1775 struct vxlan_softc *sc;
1776
1777 sc = xsc;
1778 VXLAN_LOCK_WASSERT(sc);
1779
1780 vxlan_ftable_expire(sc);
1781 callout_schedule(&sc->vxl_callout, vxlan_ftable_prune_period * hz);
1782 }
1783
1784 static int
1785 vxlan_ioctl_ifflags(struct vxlan_softc *sc)
1786 {
1787 struct ifnet *ifp;
1788
1789 ifp = sc->vxl_ifp;
1790
1791 if (ifp->if_flags & IFF_UP) {
1792 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
1793 vxlan_init(sc);
1794 } else {
1795 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
1796 vxlan_teardown(sc);
1797 }
1798
1799 return (0);
1800 }
1801
1802 static int
1803 vxlan_ctrl_get_config(struct vxlan_softc *sc, void *arg)
1804 {
1805 struct rm_priotracker tracker;
1806 struct ifvxlancfg *cfg;
1807
1808 cfg = arg;
1809 bzero(cfg, sizeof(*cfg));
1810
1811 VXLAN_RLOCK(sc, &tracker);
1812 cfg->vxlc_vni = sc->vxl_vni;
1813 memcpy(&cfg->vxlc_local_sa, &sc->vxl_src_addr,
1814 sizeof(union vxlan_sockaddr));
1815 memcpy(&cfg->vxlc_remote_sa, &sc->vxl_dst_addr,
1816 sizeof(union vxlan_sockaddr));
1817 cfg->vxlc_mc_ifindex = sc->vxl_mc_ifindex;
1818 cfg->vxlc_ftable_cnt = sc->vxl_ftable_cnt;
1819 cfg->vxlc_ftable_max = sc->vxl_ftable_max;
1820 cfg->vxlc_ftable_timeout = sc->vxl_ftable_timeout;
1821 cfg->vxlc_port_min = sc->vxl_min_port;
1822 cfg->vxlc_port_max = sc->vxl_max_port;
1823 cfg->vxlc_learn = (sc->vxl_flags & VXLAN_FLAG_LEARN) != 0;
1824 cfg->vxlc_ttl = sc->vxl_ttl;
1825 VXLAN_RUNLOCK(sc, &tracker);
1826
1827 return (0);
1828 }
1829
1830 static int
1831 vxlan_ctrl_set_vni(struct vxlan_softc *sc, void *arg)
1832 {
1833 struct ifvxlancmd *cmd;
1834 int error;
1835
1836 cmd = arg;
1837
1838 if (vxlan_check_vni(cmd->vxlcmd_vni) != 0)
1839 return (EINVAL);
1840
1841 VXLAN_WLOCK(sc);
1842 if (vxlan_can_change_config(sc)) {
1843 sc->vxl_vni = cmd->vxlcmd_vni;
1844 error = 0;
1845 } else
1846 error = EBUSY;
1847 VXLAN_WUNLOCK(sc);
1848
1849 return (error);
1850 }
1851
1852 static int
1853 vxlan_ctrl_set_local_addr(struct vxlan_softc *sc, void *arg)
1854 {
1855 struct ifvxlancmd *cmd;
1856 union vxlan_sockaddr *vxlsa;
1857 int error;
1858
1859 cmd = arg;
1860 vxlsa = &cmd->vxlcmd_sa;
1861
1862 if (!VXLAN_SOCKADDR_IS_IPV46(vxlsa))
1863 return (EINVAL);
1864 if (vxlan_sockaddr_in_multicast(vxlsa) != 0)
1865 return (EINVAL);
1866
1867 VXLAN_WLOCK(sc);
1868 if (vxlan_can_change_config(sc)) {
1869 vxlan_sockaddr_in_copy(&sc->vxl_src_addr, &vxlsa->sa);
1870 error = 0;
1871 } else
1872 error = EBUSY;
1873 VXLAN_WUNLOCK(sc);
1874
1875 return (error);
1876 }
1877
1878 static int
1879 vxlan_ctrl_set_remote_addr(struct vxlan_softc *sc, void *arg)
1880 {
1881 struct ifvxlancmd *cmd;
1882 union vxlan_sockaddr *vxlsa;
1883 int error;
1884
1885 cmd = arg;
1886 vxlsa = &cmd->vxlcmd_sa;
1887
1888 if (!VXLAN_SOCKADDR_IS_IPV46(vxlsa))
1889 return (EINVAL);
1890
1891 VXLAN_WLOCK(sc);
1892 if (vxlan_can_change_config(sc)) {
1893 vxlan_sockaddr_in_copy(&sc->vxl_dst_addr, &vxlsa->sa);
1894 error = 0;
1895 } else
1896 error = EBUSY;
1897 VXLAN_WUNLOCK(sc);
1898
1899 return (error);
1900 }
1901
1902 static int
1903 vxlan_ctrl_set_local_port(struct vxlan_softc *sc, void *arg)
1904 {
1905 struct ifvxlancmd *cmd;
1906 int error;
1907
1908 cmd = arg;
1909
1910 if (cmd->vxlcmd_port == 0)
1911 return (EINVAL);
1912
1913 VXLAN_WLOCK(sc);
1914 if (vxlan_can_change_config(sc)) {
1915 sc->vxl_src_addr.in4.sin_port = htons(cmd->vxlcmd_port);
1916 error = 0;
1917 } else
1918 error = EBUSY;
1919 VXLAN_WUNLOCK(sc);
1920
1921 return (error);
1922 }
1923
1924 static int
1925 vxlan_ctrl_set_remote_port(struct vxlan_softc *sc, void *arg)
1926 {
1927 struct ifvxlancmd *cmd;
1928 int error;
1929
1930 cmd = arg;
1931
1932 if (cmd->vxlcmd_port == 0)
1933 return (EINVAL);
1934
1935 VXLAN_WLOCK(sc);
1936 if (vxlan_can_change_config(sc)) {
1937 sc->vxl_dst_addr.in4.sin_port = htons(cmd->vxlcmd_port);
1938 error = 0;
1939 } else
1940 error = EBUSY;
1941 VXLAN_WUNLOCK(sc);
1942
1943 return (error);
1944 }
1945
1946 static int
1947 vxlan_ctrl_set_port_range(struct vxlan_softc *sc, void *arg)
1948 {
1949 struct ifvxlancmd *cmd;
1950 uint16_t min, max;
1951 int error;
1952
1953 cmd = arg;
1954 min = cmd->vxlcmd_port_min;
1955 max = cmd->vxlcmd_port_max;
1956
1957 if (max < min)
1958 return (EINVAL);
1959
1960 VXLAN_WLOCK(sc);
1961 if (vxlan_can_change_config(sc)) {
1962 sc->vxl_min_port = min;
1963 sc->vxl_max_port = max;
1964 error = 0;
1965 } else
1966 error = EBUSY;
1967 VXLAN_WUNLOCK(sc);
1968
1969 return (error);
1970 }
1971
1972 static int
1973 vxlan_ctrl_set_ftable_timeout(struct vxlan_softc *sc, void *arg)
1974 {
1975 struct ifvxlancmd *cmd;
1976 int error;
1977
1978 cmd = arg;
1979
1980 VXLAN_WLOCK(sc);
1981 if (vxlan_check_ftable_timeout(cmd->vxlcmd_ftable_timeout) == 0) {
1982 sc->vxl_ftable_timeout = cmd->vxlcmd_ftable_timeout;
1983 error = 0;
1984 } else
1985 error = EINVAL;
1986 VXLAN_WUNLOCK(sc);
1987
1988 return (error);
1989 }
1990
1991 static int
1992 vxlan_ctrl_set_ftable_max(struct vxlan_softc *sc, void *arg)
1993 {
1994 struct ifvxlancmd *cmd;
1995 int error;
1996
1997 cmd = arg;
1998
1999 VXLAN_WLOCK(sc);
2000 if (vxlan_check_ftable_max(cmd->vxlcmd_ftable_max) == 0) {
2001 sc->vxl_ftable_max = cmd->vxlcmd_ftable_max;
2002 error = 0;
2003 } else
2004 error = EINVAL;
2005 VXLAN_WUNLOCK(sc);
2006
2007 return (error);
2008 }
2009
2010 static int
2011 vxlan_ctrl_set_multicast_if(struct vxlan_softc * sc, void *arg)
2012 {
2013 struct ifvxlancmd *cmd;
2014 int error;
2015
2016 cmd = arg;
2017
2018 VXLAN_WLOCK(sc);
2019 if (vxlan_can_change_config(sc)) {
2020 strlcpy(sc->vxl_mc_ifname, cmd->vxlcmd_ifname, IFNAMSIZ);
2021 error = 0;
2022 } else
2023 error = EBUSY;
2024 VXLAN_WUNLOCK(sc);
2025
2026 return (error);
2027 }
2028
2029 static int
2030 vxlan_ctrl_set_ttl(struct vxlan_softc *sc, void *arg)
2031 {
2032 struct ifvxlancmd *cmd;
2033 int error;
2034
2035 cmd = arg;
2036
2037 VXLAN_WLOCK(sc);
2038 if (vxlan_check_ttl(cmd->vxlcmd_ttl) == 0) {
2039 sc->vxl_ttl = cmd->vxlcmd_ttl;
2040 if (sc->vxl_im4o != NULL)
2041 sc->vxl_im4o->imo_multicast_ttl = sc->vxl_ttl;
2042 if (sc->vxl_im6o != NULL)
2043 sc->vxl_im6o->im6o_multicast_hlim = sc->vxl_ttl;
2044 error = 0;
2045 } else
2046 error = EINVAL;
2047 VXLAN_WUNLOCK(sc);
2048
2049 return (error);
2050 }
2051
2052 static int
2053 vxlan_ctrl_set_learn(struct vxlan_softc *sc, void *arg)
2054 {
2055 struct ifvxlancmd *cmd;
2056
2057 cmd = arg;
2058
2059 VXLAN_WLOCK(sc);
2060 if (cmd->vxlcmd_flags & VXLAN_CMD_FLAG_LEARN)
2061 sc->vxl_flags |= VXLAN_FLAG_LEARN;
2062 else
2063 sc->vxl_flags &= ~VXLAN_FLAG_LEARN;
2064 VXLAN_WUNLOCK(sc);
2065
2066 return (0);
2067 }
2068
2069 static int
2070 vxlan_ctrl_ftable_entry_add(struct vxlan_softc *sc, void *arg)
2071 {
2072 union vxlan_sockaddr vxlsa;
2073 struct ifvxlancmd *cmd;
2074 struct vxlan_ftable_entry *fe;
2075 int error;
2076
2077 cmd = arg;
2078 vxlsa = cmd->vxlcmd_sa;
2079
2080 if (!VXLAN_SOCKADDR_IS_IPV46(&vxlsa))
2081 return (EINVAL);
2082 if (vxlan_sockaddr_in_any(&vxlsa) != 0)
2083 return (EINVAL);
2084 if (vxlan_sockaddr_in_multicast(&vxlsa) != 0)
2085 return (EINVAL);
2086 /* BMV: We could support both IPv4 and IPv6 later. */
2087 if (vxlsa.sa.sa_family != sc->vxl_dst_addr.sa.sa_family)
2088 return (EAFNOSUPPORT);
2089
2090 fe = vxlan_ftable_entry_alloc();
2091 if (fe == NULL)
2092 return (ENOMEM);
2093
2094 if (vxlsa.in4.sin_port == 0)
2095 vxlsa.in4.sin_port = sc->vxl_dst_addr.in4.sin_port;
2096
2097 vxlan_ftable_entry_init(sc, fe, cmd->vxlcmd_mac, &vxlsa.sa,
2098 VXLAN_FE_FLAG_STATIC);
2099
2100 VXLAN_WLOCK(sc);
2101 error = vxlan_ftable_entry_insert(sc, fe);
2102 VXLAN_WUNLOCK(sc);
2103
2104 if (error)
2105 vxlan_ftable_entry_free(fe);
2106
2107 return (error);
2108 }
2109
2110 static int
2111 vxlan_ctrl_ftable_entry_rem(struct vxlan_softc *sc, void *arg)
2112 {
2113 struct ifvxlancmd *cmd;
2114 struct vxlan_ftable_entry *fe;
2115 int error;
2116
2117 cmd = arg;
2118
2119 VXLAN_WLOCK(sc);
2120 fe = vxlan_ftable_entry_lookup(sc, cmd->vxlcmd_mac);
2121 if (fe != NULL) {
2122 vxlan_ftable_entry_destroy(sc, fe);
2123 error = 0;
2124 } else
2125 error = ENOENT;
2126 VXLAN_WUNLOCK(sc);
2127
2128 return (error);
2129 }
2130
2131 static int
2132 vxlan_ctrl_flush(struct vxlan_softc *sc, void *arg)
2133 {
2134 struct ifvxlancmd *cmd;
2135 int all;
2136
2137 cmd = arg;
2138 all = cmd->vxlcmd_flags & VXLAN_CMD_FLAG_FLUSH_ALL;
2139
2140 VXLAN_WLOCK(sc);
2141 vxlan_ftable_flush(sc, all);
2142 VXLAN_WUNLOCK(sc);
2143
2144 return (0);
2145 }
2146
2147 static int
2148 vxlan_ioctl_drvspec(struct vxlan_softc *sc, struct ifdrv *ifd, int get)
2149 {
2150 const struct vxlan_control *vc;
2151 union {
2152 struct ifvxlancfg cfg;
2153 struct ifvxlancmd cmd;
2154 } args;
2155 int out, error;
2156
2157 if (ifd->ifd_cmd >= vxlan_control_table_size)
2158 return (EINVAL);
2159
2160 bzero(&args, sizeof(args));
2161 vc = &vxlan_control_table[ifd->ifd_cmd];
2162 out = (vc->vxlc_flags & VXLAN_CTRL_FLAG_COPYOUT) != 0;
2163
2164 if ((get != 0 && out == 0) || (get == 0 && out != 0))
2165 return (EINVAL);
2166
2167 if (vc->vxlc_flags & VXLAN_CTRL_FLAG_SUSER) {
2168 error = priv_check(curthread, PRIV_NET_VXLAN);
2169 if (error)
2170 return (error);
2171 }
2172
2173 if (ifd->ifd_len != vc->vxlc_argsize ||
2174 ifd->ifd_len > sizeof(args))
2175 return (EINVAL);
2176
2177 if (vc->vxlc_flags & VXLAN_CTRL_FLAG_COPYIN) {
2178 error = copyin(ifd->ifd_data, &args, ifd->ifd_len);
2179 if (error)
2180 return (error);
2181 }
2182
2183 error = vc->vxlc_func(sc, &args);
2184 if (error)
2185 return (error);
2186
2187 if (vc->vxlc_flags & VXLAN_CTRL_FLAG_COPYOUT) {
2188 error = copyout(&args, ifd->ifd_data, ifd->ifd_len);
2189 if (error)
2190 return (error);
2191 }
2192
2193 return (0);
2194 }
2195
2196 static int
2197 vxlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
2198 {
2199 struct vxlan_softc *sc;
2200 struct ifreq *ifr;
2201 struct ifdrv *ifd;
2202 int error;
2203
2204 sc = ifp->if_softc;
2205 ifr = (struct ifreq *) data;
2206 ifd = (struct ifdrv *) data;
2207
2208 switch (cmd) {
2209 case SIOCADDMULTI:
2210 case SIOCDELMULTI:
2211 error = 0;
2212 break;
2213
2214 case SIOCGDRVSPEC:
2215 case SIOCSDRVSPEC:
2216 error = vxlan_ioctl_drvspec(sc, ifd, cmd == SIOCGDRVSPEC);
2217 break;
2218
2219 case SIOCSIFFLAGS:
2220 error = vxlan_ioctl_ifflags(sc);
2221 break;
2222 default:
2223 error = ether_ioctl(ifp, cmd, data);
2224 break;
2225 }
2226
2227 return (error);
2228 }
2229
2230 #if defined(INET) || defined(INET6)
2231 static uint16_t
2232 vxlan_pick_source_port(struct vxlan_softc *sc, struct mbuf *m)
2233 {
2234 int range;
2235 uint32_t hash;
2236
2237 range = sc->vxl_max_port - sc->vxl_min_port + 1;
2238
2239 /* check if flowid is set and not opaque */
2240 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE &&
2241 M_HASHTYPE_GET(m) != M_HASHTYPE_OPAQUE)
2242 hash = m->m_pkthdr.flowid;
2243 else
2244 hash = jenkins_hash(m->m_data, ETHER_HDR_LEN,
2245 sc->vxl_port_hash_key);
2246
2247 return (sc->vxl_min_port + (hash % range));
2248 }
2249
2250 static void
2251 vxlan_encap_header(struct vxlan_softc *sc, struct mbuf *m, int ipoff,
2252 uint16_t srcport, uint16_t dstport)
2253 {
2254 struct vxlanudphdr *hdr;
2255 struct udphdr *udph;
2256 struct vxlan_header *vxh;
2257 int len;
2258
2259 len = m->m_pkthdr.len - ipoff;
2260 MPASS(len >= sizeof(struct vxlanudphdr));
2261 hdr = mtodo(m, ipoff);
2262
2263 udph = &hdr->vxlh_udp;
2264 udph->uh_sport = srcport;
2265 udph->uh_dport = dstport;
2266 udph->uh_ulen = htons(len);
2267 udph->uh_sum = 0;
2268
2269 vxh = &hdr->vxlh_hdr;
2270 vxh->vxlh_flags = htonl(VXLAN_HDR_FLAGS_VALID_VNI);
2271 vxh->vxlh_vni = htonl(sc->vxl_vni << VXLAN_HDR_VNI_SHIFT);
2272 }
2273 #endif
2274
2275 static int
2276 vxlan_encap4(struct vxlan_softc *sc, const union vxlan_sockaddr *fvxlsa,
2277 struct mbuf *m)
2278 {
2279 #ifdef INET
2280 struct ifnet *ifp;
2281 struct ip *ip;
2282 struct in_addr srcaddr, dstaddr;
2283 uint16_t srcport, dstport;
2284 int len, mcast, error;
2285
2286 ifp = sc->vxl_ifp;
2287 srcaddr = sc->vxl_src_addr.in4.sin_addr;
2288 srcport = vxlan_pick_source_port(sc, m);
2289 dstaddr = fvxlsa->in4.sin_addr;
2290 dstport = fvxlsa->in4.sin_port;
2291
2292 M_PREPEND(m, sizeof(struct ip) + sizeof(struct vxlanudphdr),
2293 M_NOWAIT);
2294 if (m == NULL) {
2295 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
2296 return (ENOBUFS);
2297 }
2298
2299 len = m->m_pkthdr.len;
2300
2301 ip = mtod(m, struct ip *);
2302 ip->ip_tos = 0;
2303 ip->ip_len = htons(len);
2304 ip->ip_off = 0;
2305 ip->ip_ttl = sc->vxl_ttl;
2306 ip->ip_p = IPPROTO_UDP;
2307 ip->ip_sum = 0;
2308 ip->ip_src = srcaddr;
2309 ip->ip_dst = dstaddr;
2310
2311 vxlan_encap_header(sc, m, sizeof(struct ip), srcport, dstport);
2312
2313 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0;
2314 m->m_flags &= ~(M_MCAST | M_BCAST);
2315
2316 error = ip_output(m, NULL, NULL, 0, sc->vxl_im4o, NULL);
2317 if (error == 0) {
2318 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
2319 if_inc_counter(ifp, IFCOUNTER_OBYTES, len);
2320 if (mcast != 0)
2321 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
2322 } else
2323 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
2324
2325 return (error);
2326 #else
2327 m_freem(m);
2328 return (ENOTSUP);
2329 #endif
2330 }
2331
2332 static int
2333 vxlan_encap6(struct vxlan_softc *sc, const union vxlan_sockaddr *fvxlsa,
2334 struct mbuf *m)
2335 {
2336 #ifdef INET6
2337 struct ifnet *ifp;
2338 struct ip6_hdr *ip6;
2339 const struct in6_addr *srcaddr, *dstaddr;
2340 uint16_t srcport, dstport;
2341 int len, mcast, error;
2342
2343 ifp = sc->vxl_ifp;
2344 srcaddr = &sc->vxl_src_addr.in6.sin6_addr;
2345 srcport = vxlan_pick_source_port(sc, m);
2346 dstaddr = &fvxlsa->in6.sin6_addr;
2347 dstport = fvxlsa->in6.sin6_port;
2348
2349 M_PREPEND(m, sizeof(struct ip6_hdr) + sizeof(struct vxlanudphdr),
2350 M_NOWAIT);
2351 if (m == NULL) {
2352 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
2353 return (ENOBUFS);
2354 }
2355
2356 len = m->m_pkthdr.len;
2357
2358 ip6 = mtod(m, struct ip6_hdr *);
2359 ip6->ip6_flow = 0; /* BMV: Keep in forwarding entry? */
2360 ip6->ip6_vfc = IPV6_VERSION;
2361 ip6->ip6_plen = 0;
2362 ip6->ip6_nxt = IPPROTO_UDP;
2363 ip6->ip6_hlim = sc->vxl_ttl;
2364 ip6->ip6_src = *srcaddr;
2365 ip6->ip6_dst = *dstaddr;
2366
2367 vxlan_encap_header(sc, m, sizeof(struct ip6_hdr), srcport, dstport);
2368
2369 /*
2370 * XXX BMV We need support for RFC6935 before we can send and
2371 * receive IPv6 UDP packets with a zero checksum.
2372 */
2373 {
2374 struct udphdr *hdr = mtodo(m, sizeof(struct ip6_hdr));
2375 hdr->uh_sum = in6_cksum_pseudo(ip6,
2376 m->m_pkthdr.len - sizeof(struct ip6_hdr), IPPROTO_UDP, 0);
2377 m->m_pkthdr.csum_flags = CSUM_UDP_IPV6;
2378 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
2379 }
2380
2381 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0;
2382 m->m_flags &= ~(M_MCAST | M_BCAST);
2383
2384 error = ip6_output(m, NULL, NULL, 0, sc->vxl_im6o, NULL, NULL);
2385 if (error == 0) {
2386 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
2387 if_inc_counter(ifp, IFCOUNTER_OBYTES, len);
2388 if (mcast != 0)
2389 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
2390 } else
2391 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
2392
2393 return (error);
2394 #else
2395 m_freem(m);
2396 return (ENOTSUP);
2397 #endif
2398 }
2399
2400 static int
2401 vxlan_transmit(struct ifnet *ifp, struct mbuf *m)
2402 {
2403 struct rm_priotracker tracker;
2404 union vxlan_sockaddr vxlsa;
2405 struct vxlan_softc *sc;
2406 struct vxlan_ftable_entry *fe;
2407 struct ifnet *mcifp;
2408 struct ether_header *eh;
2409 int ipv4, error;
2410
2411 sc = ifp->if_softc;
2412 eh = mtod(m, struct ether_header *);
2413 fe = NULL;
2414 mcifp = NULL;
2415
2416 ETHER_BPF_MTAP(ifp, m);
2417
2418 VXLAN_RLOCK(sc, &tracker);
2419 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
2420 VXLAN_RUNLOCK(sc, &tracker);
2421 m_freem(m);
2422 return (ENETDOWN);
2423 }
2424
2425 if ((m->m_flags & (M_BCAST | M_MCAST)) == 0)
2426 fe = vxlan_ftable_entry_lookup(sc, eh->ether_dhost);
2427 if (fe == NULL)
2428 fe = &sc->vxl_default_fe;
2429 vxlan_sockaddr_copy(&vxlsa, &fe->vxlfe_raddr.sa);
2430
2431 ipv4 = VXLAN_SOCKADDR_IS_IPV4(&vxlsa) != 0;
2432 if (vxlan_sockaddr_in_multicast(&vxlsa) != 0)
2433 mcifp = vxlan_multicast_if_ref(sc, ipv4);
2434
2435 VXLAN_ACQUIRE(sc);
2436 VXLAN_RUNLOCK(sc, &tracker);
2437
2438 if (ipv4 != 0)
2439 error = vxlan_encap4(sc, &vxlsa, m);
2440 else
2441 error = vxlan_encap6(sc, &vxlsa, m);
2442
2443 vxlan_release(sc);
2444 if (mcifp != NULL)
2445 if_rele(mcifp);
2446
2447 return (error);
2448 }
2449
2450 static void
2451 vxlan_qflush(struct ifnet *ifp __unused)
2452 {
2453 }
2454
2455 static void
2456 vxlan_rcv_udp_packet(struct mbuf *m, int offset, struct inpcb *inpcb,
2457 const struct sockaddr *srcsa, void *xvso)
2458 {
2459 struct vxlan_socket *vso;
2460 struct vxlan_header *vxh, vxlanhdr;
2461 uint32_t vni;
2462 int error;
2463
2464 M_ASSERTPKTHDR(m);
2465 vso = xvso;
2466 offset += sizeof(struct udphdr);
2467
2468 if (m->m_pkthdr.len < offset + sizeof(struct vxlan_header))
2469 goto out;
2470
2471 if (__predict_false(m->m_len < offset + sizeof(struct vxlan_header))) {
2472 m_copydata(m, offset, sizeof(struct vxlan_header),
2473 (caddr_t) &vxlanhdr);
2474 vxh = &vxlanhdr;
2475 } else
2476 vxh = mtodo(m, offset);
2477
2478 /*
2479 * Drop if there is a reserved bit set in either the flags or VNI
2480 * fields of the header. This goes against the specification, but
2481 * a bit set may indicate an unsupported new feature. This matches
2482 * the behavior of the Linux implementation.
2483 */
2484 if (vxh->vxlh_flags != htonl(VXLAN_HDR_FLAGS_VALID_VNI) ||
2485 vxh->vxlh_vni & ~htonl(VXLAN_VNI_MASK))
2486 goto out;
2487
2488 vni = ntohl(vxh->vxlh_vni) >> VXLAN_HDR_VNI_SHIFT;
2489 /* Adjust to the start of the inner Ethernet frame. */
2490 m_adj(m, offset + sizeof(struct vxlan_header));
2491
2492 error = vxlan_input(vso, vni, &m, srcsa);
2493 MPASS(error != 0 || m == NULL);
2494
2495 out:
2496 if (m != NULL)
2497 m_freem(m);
2498 }
2499
2500 static int
2501 vxlan_input(struct vxlan_socket *vso, uint32_t vni, struct mbuf **m0,
2502 const struct sockaddr *sa)
2503 {
2504 struct vxlan_softc *sc;
2505 struct ifnet *ifp;
2506 struct mbuf *m;
2507 struct ether_header *eh;
2508 int error;
2509
2510 sc = vxlan_socket_lookup_softc(vso, vni);
2511 if (sc == NULL)
2512 return (ENOENT);
2513
2514 ifp = sc->vxl_ifp;
2515 m = *m0;
2516 eh = mtod(m, struct ether_header *);
2517
2518 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
2519 error = ENETDOWN;
2520 goto out;
2521 } else if (ifp == m->m_pkthdr.rcvif) {
2522 /* XXX Does not catch more complex loops. */
2523 error = EDEADLK;
2524 goto out;
2525 }
2526
2527 if (sc->vxl_flags & VXLAN_FLAG_LEARN)
2528 vxlan_ftable_update(sc, sa, eh->ether_shost);
2529
2530 m_clrprotoflags(m);
2531 m->m_pkthdr.rcvif = ifp;
2532 M_SETFIB(m, ifp->if_fib);
2533
2534 error = netisr_queue_src(NETISR_ETHER, 0, m);
2535 *m0 = NULL;
2536
2537 out:
2538 vxlan_release(sc);
2539 return (error);
2540 }
2541
2542 static void
2543 vxlan_set_default_config(struct vxlan_softc *sc)
2544 {
2545
2546 sc->vxl_flags |= VXLAN_FLAG_LEARN;
2547
2548 sc->vxl_vni = VXLAN_VNI_MAX;
2549 sc->vxl_ttl = IPDEFTTL;
2550
2551 if (!vxlan_tunable_int(sc, "legacy_port", vxlan_legacy_port)) {
2552 sc->vxl_src_addr.in4.sin_port = htons(VXLAN_PORT);
2553 sc->vxl_dst_addr.in4.sin_port = htons(VXLAN_PORT);
2554 } else {
2555 sc->vxl_src_addr.in4.sin_port = htons(VXLAN_LEGACY_PORT);
2556 sc->vxl_dst_addr.in4.sin_port = htons(VXLAN_LEGACY_PORT);
2557 }
2558
2559 sc->vxl_min_port = V_ipport_firstauto;
2560 sc->vxl_max_port = V_ipport_lastauto;
2561
2562 sc->vxl_ftable_max = VXLAN_FTABLE_MAX;
2563 sc->vxl_ftable_timeout = VXLAN_FTABLE_TIMEOUT;
2564 }
2565
2566 static int
2567 vxlan_set_user_config(struct vxlan_softc *sc, struct ifvxlanparam *vxlp)
2568 {
2569
2570 #ifndef INET
2571 if (vxlp->vxlp_with & (VXLAN_PARAM_WITH_LOCAL_ADDR4 |
2572 VXLAN_PARAM_WITH_REMOTE_ADDR4))
2573 return (EAFNOSUPPORT);
2574 #endif
2575
2576 #ifndef INET6
2577 if (vxlp->vxlp_with & (VXLAN_PARAM_WITH_LOCAL_ADDR6 |
2578 VXLAN_PARAM_WITH_REMOTE_ADDR6))
2579 return (EAFNOSUPPORT);
2580 #endif
2581
2582 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_VNI) {
2583 if (vxlan_check_vni(vxlp->vxlp_vni) == 0)
2584 sc->vxl_vni = vxlp->vxlp_vni;
2585 }
2586
2587 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_LOCAL_ADDR4) {
2588 sc->vxl_src_addr.in4.sin_len = sizeof(struct sockaddr_in);
2589 sc->vxl_src_addr.in4.sin_family = AF_INET;
2590 sc->vxl_src_addr.in4.sin_addr = vxlp->vxlp_local_in4;
2591 } else if (vxlp->vxlp_with & VXLAN_PARAM_WITH_LOCAL_ADDR6) {
2592 sc->vxl_src_addr.in6.sin6_len = sizeof(struct sockaddr_in6);
2593 sc->vxl_src_addr.in6.sin6_family = AF_INET6;
2594 sc->vxl_src_addr.in6.sin6_addr = vxlp->vxlp_local_in6;
2595 }
2596
2597 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_REMOTE_ADDR4) {
2598 sc->vxl_dst_addr.in4.sin_len = sizeof(struct sockaddr_in);
2599 sc->vxl_dst_addr.in4.sin_family = AF_INET;
2600 sc->vxl_dst_addr.in4.sin_addr = vxlp->vxlp_remote_in4;
2601 } else if (vxlp->vxlp_with & VXLAN_PARAM_WITH_REMOTE_ADDR6) {
2602 sc->vxl_dst_addr.in6.sin6_len = sizeof(struct sockaddr_in6);
2603 sc->vxl_dst_addr.in6.sin6_family = AF_INET6;
2604 sc->vxl_dst_addr.in6.sin6_addr = vxlp->vxlp_remote_in6;
2605 }
2606
2607 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_LOCAL_PORT)
2608 sc->vxl_src_addr.in4.sin_port = htons(vxlp->vxlp_local_port);
2609 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_REMOTE_PORT)
2610 sc->vxl_dst_addr.in4.sin_port = htons(vxlp->vxlp_remote_port);
2611
2612 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_PORT_RANGE) {
2613 if (vxlp->vxlp_min_port <= vxlp->vxlp_max_port) {
2614 sc->vxl_min_port = vxlp->vxlp_min_port;
2615 sc->vxl_max_port = vxlp->vxlp_max_port;
2616 }
2617 }
2618
2619 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_MULTICAST_IF)
2620 strlcpy(sc->vxl_mc_ifname, vxlp->vxlp_mc_ifname, IFNAMSIZ);
2621
2622 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_FTABLE_TIMEOUT) {
2623 if (vxlan_check_ftable_timeout(vxlp->vxlp_ftable_timeout) == 0)
2624 sc->vxl_ftable_timeout = vxlp->vxlp_ftable_timeout;
2625 }
2626
2627 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_FTABLE_MAX) {
2628 if (vxlan_check_ftable_max(vxlp->vxlp_ftable_max) == 0)
2629 sc->vxl_ftable_max = vxlp->vxlp_ftable_max;
2630 }
2631
2632 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_TTL) {
2633 if (vxlan_check_ttl(vxlp->vxlp_ttl) == 0)
2634 sc->vxl_ttl = vxlp->vxlp_ttl;
2635 }
2636
2637 if (vxlp->vxlp_with & VXLAN_PARAM_WITH_LEARN) {
2638 if (vxlp->vxlp_learn == 0)
2639 sc->vxl_flags &= ~VXLAN_FLAG_LEARN;
2640 }
2641
2642 return (0);
2643 }
2644
2645 static int
2646 vxlan_clone_create(struct if_clone *ifc, int unit, caddr_t params)
2647 {
2648 struct vxlan_softc *sc;
2649 struct ifnet *ifp;
2650 struct ifvxlanparam vxlp;
2651 int error;
2652
2653 sc = malloc(sizeof(struct vxlan_softc), M_VXLAN, M_WAITOK | M_ZERO);
2654 sc->vxl_unit = unit;
2655 vxlan_set_default_config(sc);
2656
2657 if (params != 0) {
2658 error = copyin(params, &vxlp, sizeof(vxlp));
2659 if (error)
2660 goto fail;
2661
2662 error = vxlan_set_user_config(sc, &vxlp);
2663 if (error)
2664 goto fail;
2665 }
2666
2667 ifp = if_alloc(IFT_ETHER);
2668 if (ifp == NULL) {
2669 error = ENOSPC;
2670 goto fail;
2671 }
2672
2673 sc->vxl_ifp = ifp;
2674 rm_init(&sc->vxl_lock, "vxlanrm");
2675 callout_init_rw(&sc->vxl_callout, &sc->vxl_lock, 0);
2676 sc->vxl_port_hash_key = arc4random();
2677 vxlan_ftable_init(sc);
2678
2679 vxlan_sysctl_setup(sc);
2680
2681 ifp->if_softc = sc;
2682 if_initname(ifp, vxlan_name, unit);
2683 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
2684 ifp->if_init = vxlan_init;
2685 ifp->if_ioctl = vxlan_ioctl;
2686 ifp->if_transmit = vxlan_transmit;
2687 ifp->if_qflush = vxlan_qflush;
2688
2689 vxlan_fakeaddr(sc);
2690 ether_ifattach(ifp, sc->vxl_hwaddr);
2691
2692 ifp->if_baudrate = 0;
2693 ifp->if_hdrlen = 0;
2694
2695 return (0);
2696
2697 fail:
2698 free(sc, M_VXLAN);
2699 return (error);
2700 }
2701
2702 static void
2703 vxlan_clone_destroy(struct ifnet *ifp)
2704 {
2705 struct vxlan_softc *sc;
2706
2707 sc = ifp->if_softc;
2708
2709 vxlan_teardown(sc);
2710
2711 vxlan_ftable_flush(sc, 1);
2712
2713 ether_ifdetach(ifp);
2714 if_free(ifp);
2715
2716 vxlan_ftable_fini(sc);
2717
2718 vxlan_sysctl_destroy(sc);
2719 rm_destroy(&sc->vxl_lock);
2720 free(sc, M_VXLAN);
2721 }
2722
2723 /* BMV: Taken from if_bridge. */
2724 static uint32_t
2725 vxlan_mac_hash(struct vxlan_softc *sc, const uint8_t *addr)
2726 {
2727 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = sc->vxl_ftable_hash_key;
2728
2729 b += addr[5] << 8;
2730 b += addr[4];
2731 a += addr[3] << 24;
2732 a += addr[2] << 16;
2733 a += addr[1] << 8;
2734 a += addr[0];
2735
2736 /*
2737 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
2738 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
2739 */
2740 #define mix(a, b, c) \
2741 do { \
2742 a -= b; a -= c; a ^= (c >> 13); \
2743 b -= c; b -= a; b ^= (a << 8); \
2744 c -= a; c -= b; c ^= (b >> 13); \
2745 a -= b; a -= c; a ^= (c >> 12); \
2746 b -= c; b -= a; b ^= (a << 16); \
2747 c -= a; c -= b; c ^= (b >> 5); \
2748 a -= b; a -= c; a ^= (c >> 3); \
2749 b -= c; b -= a; b ^= (a << 10); \
2750 c -= a; c -= b; c ^= (b >> 15); \
2751 } while (0)
2752
2753 mix(a, b, c);
2754
2755 #undef mix
2756
2757 return (c);
2758 }
2759
2760 static void
2761 vxlan_fakeaddr(struct vxlan_softc *sc)
2762 {
2763
2764 /*
2765 * Generate a non-multicast, locally administered address.
2766 *
2767 * BMV: Should we use the FreeBSD OUI range instead?
2768 */
2769 arc4rand(sc->vxl_hwaddr, ETHER_ADDR_LEN, 1);
2770 sc->vxl_hwaddr[0] &= ~1;
2771 sc->vxl_hwaddr[0] |= 2;
2772 }
2773
2774 static int
2775 vxlan_sockaddr_cmp(const union vxlan_sockaddr *vxladdr,
2776 const struct sockaddr *sa)
2777 {
2778
2779 return (bcmp(&vxladdr->sa, sa, vxladdr->sa.sa_len));
2780 }
2781
2782 static void
2783 vxlan_sockaddr_copy(union vxlan_sockaddr *vxladdr,
2784 const struct sockaddr *sa)
2785 {
2786
2787 MPASS(sa->sa_family == AF_INET || sa->sa_family == AF_INET6);
2788 bzero(vxladdr, sizeof(*vxladdr));
2789
2790 if (sa->sa_family == AF_INET) {
2791 vxladdr->in4 = *satoconstsin(sa);
2792 vxladdr->in4.sin_len = sizeof(struct sockaddr_in);
2793 } else if (sa->sa_family == AF_INET6) {
2794 vxladdr->in6 = *satoconstsin6(sa);
2795 vxladdr->in6.sin6_len = sizeof(struct sockaddr_in6);
2796 }
2797 }
2798
2799 static int
2800 vxlan_sockaddr_in_equal(const union vxlan_sockaddr *vxladdr,
2801 const struct sockaddr *sa)
2802 {
2803 int equal;
2804
2805 if (sa->sa_family == AF_INET) {
2806 const struct in_addr *in4 = &satoconstsin(sa)->sin_addr;
2807 equal = in4->s_addr == vxladdr->in4.sin_addr.s_addr;
2808 } else if (sa->sa_family == AF_INET6) {
2809 const struct in6_addr *in6 = &satoconstsin6(sa)->sin6_addr;
2810 equal = IN6_ARE_ADDR_EQUAL(in6, &vxladdr->in6.sin6_addr);
2811 } else
2812 equal = 0;
2813
2814 return (equal);
2815 }
2816
2817 static void
2818 vxlan_sockaddr_in_copy(union vxlan_sockaddr *vxladdr,
2819 const struct sockaddr *sa)
2820 {
2821
2822 MPASS(sa->sa_family == AF_INET || sa->sa_family == AF_INET6);
2823
2824 if (sa->sa_family == AF_INET) {
2825 const struct in_addr *in4 = &satoconstsin(sa)->sin_addr;
2826 vxladdr->in4.sin_family = AF_INET;
2827 vxladdr->in4.sin_len = sizeof(struct sockaddr_in);
2828 vxladdr->in4.sin_addr = *in4;
2829 } else if (sa->sa_family == AF_INET6) {
2830 const struct in6_addr *in6 = &satoconstsin6(sa)->sin6_addr;
2831 vxladdr->in6.sin6_family = AF_INET6;
2832 vxladdr->in6.sin6_len = sizeof(struct sockaddr_in6);
2833 vxladdr->in6.sin6_addr = *in6;
2834 }
2835 }
2836
2837 static int
2838 vxlan_sockaddr_supported(const union vxlan_sockaddr *vxladdr, int unspec)
2839 {
2840 const struct sockaddr *sa;
2841 int supported;
2842
2843 sa = &vxladdr->sa;
2844 supported = 0;
2845
2846 if (sa->sa_family == AF_UNSPEC && unspec != 0) {
2847 supported = 1;
2848 } else if (sa->sa_family == AF_INET) {
2849 #ifdef INET
2850 supported = 1;
2851 #endif
2852 } else if (sa->sa_family == AF_INET6) {
2853 #ifdef INET6
2854 supported = 1;
2855 #endif
2856 }
2857
2858 return (supported);
2859 }
2860
2861 static int
2862 vxlan_sockaddr_in_any(const union vxlan_sockaddr *vxladdr)
2863 {
2864 const struct sockaddr *sa;
2865 int any;
2866
2867 sa = &vxladdr->sa;
2868
2869 if (sa->sa_family == AF_INET) {
2870 const struct in_addr *in4 = &satoconstsin(sa)->sin_addr;
2871 any = in4->s_addr == INADDR_ANY;
2872 } else if (sa->sa_family == AF_INET6) {
2873 const struct in6_addr *in6 = &satoconstsin6(sa)->sin6_addr;
2874 any = IN6_IS_ADDR_UNSPECIFIED(in6);
2875 } else
2876 any = -1;
2877
2878 return (any);
2879 }
2880
2881 static int
2882 vxlan_sockaddr_in_multicast(const union vxlan_sockaddr *vxladdr)
2883 {
2884 const struct sockaddr *sa;
2885 int mc;
2886
2887 sa = &vxladdr->sa;
2888
2889 if (sa->sa_family == AF_INET) {
2890 const struct in_addr *in4 = &satoconstsin(sa)->sin_addr;
2891 mc = IN_MULTICAST(ntohl(in4->s_addr));
2892 } else if (sa->sa_family == AF_INET6) {
2893 const struct in6_addr *in6 = &satoconstsin6(sa)->sin6_addr;
2894 mc = IN6_IS_ADDR_MULTICAST(in6);
2895 } else
2896 mc = -1;
2897
2898 return (mc);
2899 }
2900
2901 static int
2902 vxlan_can_change_config(struct vxlan_softc *sc)
2903 {
2904 struct ifnet *ifp;
2905
2906 ifp = sc->vxl_ifp;
2907 VXLAN_LOCK_ASSERT(sc);
2908
2909 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
2910 return (0);
2911 if (sc->vxl_flags & (VXLAN_FLAG_INIT | VXLAN_FLAG_TEARDOWN))
2912 return (0);
2913
2914 return (1);
2915 }
2916
2917 static int
2918 vxlan_check_vni(uint32_t vni)
2919 {
2920
2921 return (vni >= VXLAN_VNI_MAX);
2922 }
2923
2924 static int
2925 vxlan_check_ttl(int ttl)
2926 {
2927
2928 return (ttl > MAXTTL);
2929 }
2930
2931 static int
2932 vxlan_check_ftable_timeout(uint32_t timeout)
2933 {
2934
2935 return (timeout > VXLAN_FTABLE_MAX_TIMEOUT);
2936 }
2937
2938 static int
2939 vxlan_check_ftable_max(uint32_t max)
2940 {
2941
2942 return (max > VXLAN_FTABLE_MAX);
2943 }
2944
2945 static void
2946 vxlan_sysctl_setup(struct vxlan_softc *sc)
2947 {
2948 struct sysctl_ctx_list *ctx;
2949 struct sysctl_oid *node;
2950 struct vxlan_statistics *stats;
2951 char namebuf[8];
2952
2953 ctx = &sc->vxl_sysctl_ctx;
2954 stats = &sc->vxl_stats;
2955 snprintf(namebuf, sizeof(namebuf), "%d", sc->vxl_unit);
2956
2957 sysctl_ctx_init(ctx);
2958 sc->vxl_sysctl_node = SYSCTL_ADD_NODE(ctx,
2959 SYSCTL_STATIC_CHILDREN(_net_link_vxlan), OID_AUTO, namebuf,
2960 CTLFLAG_RD, NULL, "");
2961
2962 node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(sc->vxl_sysctl_node),
2963 OID_AUTO, "ftable", CTLFLAG_RD, NULL, "");
2964 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(node), OID_AUTO, "count",
2965 CTLFLAG_RD, &sc->vxl_ftable_cnt, 0,
2966 "Number of entries in fowarding table");
2967 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(node), OID_AUTO, "max",
2968 CTLFLAG_RD, &sc->vxl_ftable_max, 0,
2969 "Maximum number of entries allowed in fowarding table");
2970 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(node), OID_AUTO, "timeout",
2971 CTLFLAG_RD, &sc->vxl_ftable_timeout, 0,
2972 "Number of seconds between prunes of the forwarding table");
2973 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(node), OID_AUTO, "dump",
2974 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_SKIP,
2975 sc, 0, vxlan_ftable_sysctl_dump, "A",
2976 "Dump the forwarding table entries");
2977
2978 node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(sc->vxl_sysctl_node),
2979 OID_AUTO, "stats", CTLFLAG_RD, NULL, "");
2980 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(node), OID_AUTO,
2981 "ftable_nospace", CTLFLAG_RD, &stats->ftable_nospace, 0,
2982 "Fowarding table reached maximum entries");
2983 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(node), OID_AUTO,
2984 "ftable_lock_upgrade_failed", CTLFLAG_RD,
2985 &stats->ftable_lock_upgrade_failed, 0,
2986 "Forwarding table update required lock upgrade");
2987 }
2988
2989 static void
2990 vxlan_sysctl_destroy(struct vxlan_softc *sc)
2991 {
2992
2993 sysctl_ctx_free(&sc->vxl_sysctl_ctx);
2994 sc->vxl_sysctl_node = NULL;
2995 }
2996
2997 static int
2998 vxlan_tunable_int(struct vxlan_softc *sc, const char *knob, int def)
2999 {
3000 char path[64];
3001
3002 snprintf(path, sizeof(path), "net.link.vxlan.%d.%s",
3003 sc->vxl_unit, knob);
3004 TUNABLE_INT_FETCH(path, &def);
3005
3006 return (def);
3007 }
3008
3009 static void
3010 vxlan_ifdetach_event(void *arg __unused, struct ifnet *ifp)
3011 {
3012 struct vxlan_softc_head list;
3013 struct vxlan_socket *vso;
3014 struct vxlan_softc *sc, *tsc;
3015
3016 LIST_INIT(&list);
3017
3018 if (ifp->if_flags & IFF_RENAMING)
3019 return;
3020 if ((ifp->if_flags & IFF_MULTICAST) == 0)
3021 return;
3022
3023 mtx_lock(&vxlan_list_mtx);
3024 LIST_FOREACH(vso, &vxlan_socket_list, vxlso_entry)
3025 vxlan_socket_ifdetach(vso, ifp, &list);
3026 mtx_unlock(&vxlan_list_mtx);
3027
3028 LIST_FOREACH_SAFE(sc, &list, vxl_ifdetach_list, tsc) {
3029 LIST_REMOVE(sc, vxl_ifdetach_list);
3030
3031 VXLAN_WLOCK(sc);
3032 if (sc->vxl_flags & VXLAN_FLAG_INIT)
3033 vxlan_init_wait(sc);
3034 vxlan_teardown_locked(sc);
3035 }
3036 }
3037
3038 static void
3039 vxlan_load(void)
3040 {
3041
3042 mtx_init(&vxlan_list_mtx, "vxlan list", NULL, MTX_DEF);
3043 LIST_INIT(&vxlan_socket_list);
3044 vxlan_ifdetach_event_tag = EVENTHANDLER_REGISTER(ifnet_departure_event,
3045 vxlan_ifdetach_event, NULL, EVENTHANDLER_PRI_ANY);
3046 vxlan_cloner = if_clone_simple(vxlan_name, vxlan_clone_create,
3047 vxlan_clone_destroy, 0);
3048 }
3049
3050 static void
3051 vxlan_unload(void)
3052 {
3053
3054 EVENTHANDLER_DEREGISTER(ifnet_departure_event,
3055 vxlan_ifdetach_event_tag);
3056 if_clone_detach(vxlan_cloner);
3057 mtx_destroy(&vxlan_list_mtx);
3058 MPASS(LIST_EMPTY(&vxlan_socket_list));
3059 }
3060
3061 static int
3062 vxlan_modevent(module_t mod, int type, void *unused)
3063 {
3064 int error;
3065
3066 error = 0;
3067
3068 switch (type) {
3069 case MOD_LOAD:
3070 vxlan_load();
3071 break;
3072 case MOD_UNLOAD:
3073 vxlan_unload();
3074 break;
3075 default:
3076 error = ENOTSUP;
3077 break;
3078 }
3079
3080 return (error);
3081 }
3082
3083 static moduledata_t vxlan_mod = {
3084 "if_vxlan",
3085 vxlan_modevent,
3086 0
3087 };
3088
3089 DECLARE_MODULE(if_vxlan, vxlan_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
3090 MODULE_VERSION(if_vxlan, 1);
FreeBSD src