1 /*-
2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
15 *
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: releng/11.0/sys/netinet/sctp_bsd_addr.c 298942 2016-05-02 20:56:11Z pfg $");
35
36 #include <netinet/sctp_os.h>
37 #include <netinet/sctp_var.h>
38 #include <netinet/sctp_pcb.h>
39 #include <netinet/sctp_header.h>
40 #include <netinet/sctputil.h>
41 #include <netinet/sctp_output.h>
42 #include <netinet/sctp_bsd_addr.h>
43 #include <netinet/sctp_uio.h>
44 #include <netinet/sctputil.h>
45 #include <netinet/sctp_timer.h>
46 #include <netinet/sctp_asconf.h>
47 #include <netinet/sctp_sysctl.h>
48 #include <netinet/sctp_indata.h>
49 #include <sys/unistd.h>
50
51 /* Declare all of our malloc named types */
52 MALLOC_DEFINE(SCTP_M_MAP, "sctp_map", "sctp asoc map descriptor");
53 MALLOC_DEFINE(SCTP_M_STRMI, "sctp_stri", "sctp stream in array");
54 MALLOC_DEFINE(SCTP_M_STRMO, "sctp_stro", "sctp stream out array");
55 MALLOC_DEFINE(SCTP_M_ASC_ADDR, "sctp_aadr", "sctp asconf address");
56 MALLOC_DEFINE(SCTP_M_ASC_IT, "sctp_a_it", "sctp asconf iterator");
57 MALLOC_DEFINE(SCTP_M_AUTH_CL, "sctp_atcl", "sctp auth chunklist");
58 MALLOC_DEFINE(SCTP_M_AUTH_KY, "sctp_atky", "sctp auth key");
59 MALLOC_DEFINE(SCTP_M_AUTH_HL, "sctp_athm", "sctp auth hmac list");
60 MALLOC_DEFINE(SCTP_M_AUTH_IF, "sctp_athi", "sctp auth info");
61 MALLOC_DEFINE(SCTP_M_STRESET, "sctp_stre", "sctp stream reset");
62 MALLOC_DEFINE(SCTP_M_CMSG, "sctp_cmsg", "sctp CMSG buffer");
63 MALLOC_DEFINE(SCTP_M_COPYAL, "sctp_cpal", "sctp copy all");
64 MALLOC_DEFINE(SCTP_M_VRF, "sctp_vrf", "sctp vrf struct");
65 MALLOC_DEFINE(SCTP_M_IFA, "sctp_ifa", "sctp ifa struct");
66 MALLOC_DEFINE(SCTP_M_IFN, "sctp_ifn", "sctp ifn struct");
67 MALLOC_DEFINE(SCTP_M_TIMW, "sctp_timw", "sctp time block");
68 MALLOC_DEFINE(SCTP_M_MVRF, "sctp_mvrf", "sctp mvrf pcb list");
69 MALLOC_DEFINE(SCTP_M_ITER, "sctp_iter", "sctp iterator control");
70 MALLOC_DEFINE(SCTP_M_SOCKOPT, "sctp_socko", "sctp socket option");
71 MALLOC_DEFINE(SCTP_M_MCORE, "sctp_mcore", "sctp mcore queue");
72
73 /* Global NON-VNET structure that controls the iterator */
74 struct iterator_control sctp_it_ctl;
75
76
77 void
78 sctp_wakeup_iterator(void)
79 {
80 wakeup(&sctp_it_ctl.iterator_running);
81 }
82
83 static void
84 sctp_iterator_thread(void *v SCTP_UNUSED)
85 {
86 SCTP_IPI_ITERATOR_WQ_LOCK();
87 /* In FreeBSD this thread never terminates. */
88 for (;;) {
89 msleep(&sctp_it_ctl.iterator_running,
90 &sctp_it_ctl.ipi_iterator_wq_mtx,
91 0, "waiting_for_work", 0);
92 sctp_iterator_worker();
93 }
94 }
95
96 void
97 sctp_startup_iterator(void)
98 {
99 if (sctp_it_ctl.thread_proc) {
100 /* You only get one */
101 return;
102 }
103 /* Initialize global locks here, thus only once. */
104 SCTP_ITERATOR_LOCK_INIT();
105 SCTP_IPI_ITERATOR_WQ_INIT();
106 TAILQ_INIT(&sctp_it_ctl.iteratorhead);
107 kproc_create(sctp_iterator_thread,
108 (void *)NULL,
109 &sctp_it_ctl.thread_proc,
110 RFPROC,
111 SCTP_KTHREAD_PAGES,
112 SCTP_KTRHEAD_NAME);
113 }
114
115 #ifdef INET6
116
117 void
118 sctp_gather_internal_ifa_flags(struct sctp_ifa *ifa)
119 {
120 struct in6_ifaddr *ifa6;
121
122 ifa6 = (struct in6_ifaddr *)ifa->ifa;
123 ifa->flags = ifa6->ia6_flags;
124 if (!MODULE_GLOBAL(ip6_use_deprecated)) {
125 if (ifa->flags &
126 IN6_IFF_DEPRECATED) {
127 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
128 } else {
129 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
130 }
131 } else {
132 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
133 }
134 if (ifa->flags &
135 (IN6_IFF_DETACHED |
136 IN6_IFF_ANYCAST |
137 IN6_IFF_NOTREADY)) {
138 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
139 } else {
140 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
141 }
142 }
143
144 #endif /* INET6 */
145
146
147 static uint32_t
148 sctp_is_desired_interface_type(struct ifnet *ifn)
149 {
150 int result;
151
152 /* check the interface type to see if it's one we care about */
153 switch (ifn->if_type) {
154 case IFT_ETHER:
155 case IFT_ISO88023:
156 case IFT_ISO88024:
157 case IFT_ISO88025:
158 case IFT_ISO88026:
159 case IFT_STARLAN:
160 case IFT_P10:
161 case IFT_P80:
162 case IFT_HY:
163 case IFT_FDDI:
164 case IFT_XETHER:
165 case IFT_ISDNBASIC:
166 case IFT_ISDNPRIMARY:
167 case IFT_PTPSERIAL:
168 case IFT_OTHER:
169 case IFT_PPP:
170 case IFT_LOOP:
171 case IFT_SLIP:
172 case IFT_GIF:
173 case IFT_L2VLAN:
174 case IFT_STF:
175 case IFT_IP:
176 case IFT_IPOVERCDLC:
177 case IFT_IPOVERCLAW:
178 case IFT_PROPVIRTUAL: /* NetGraph Virtual too */
179 case IFT_VIRTUALIPADDRESS:
180 result = 1;
181 break;
182 default:
183 result = 0;
184 }
185
186 return (result);
187 }
188
189
190
191
192 static void
193 sctp_init_ifns_for_vrf(int vrfid)
194 {
195 /*
196 * Here we must apply ANY locks needed by the IFN we access and also
197 * make sure we lock any IFA that exists as we float through the
198 * list of IFA's
199 */
200 struct ifnet *ifn;
201 struct ifaddr *ifa;
202 struct sctp_ifa *sctp_ifa;
203 uint32_t ifa_flags;
204
205 #ifdef INET6
206 struct in6_ifaddr *ifa6;
207
208 #endif
209
210 IFNET_RLOCK();
211 TAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_list) {
212 if (sctp_is_desired_interface_type(ifn) == 0) {
213 /* non desired type */
214 continue;
215 }
216 IF_ADDR_RLOCK(ifn);
217 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
218 if (ifa->ifa_addr == NULL) {
219 continue;
220 }
221 switch (ifa->ifa_addr->sa_family) {
222 #ifdef INET
223 case AF_INET:
224 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
225 continue;
226 }
227 break;
228 #endif
229 #ifdef INET6
230 case AF_INET6:
231 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
232 /* skip unspecifed addresses */
233 continue;
234 }
235 break;
236 #endif
237 default:
238 continue;
239 }
240 switch (ifa->ifa_addr->sa_family) {
241 #ifdef INET
242 case AF_INET:
243 ifa_flags = 0;
244 break;
245 #endif
246 #ifdef INET6
247 case AF_INET6:
248 ifa6 = (struct in6_ifaddr *)ifa;
249 ifa_flags = ifa6->ia6_flags;
250 break;
251 #endif
252 default:
253 ifa_flags = 0;
254 break;
255 }
256 sctp_ifa = sctp_add_addr_to_vrf(vrfid,
257 (void *)ifn,
258 ifn->if_index,
259 ifn->if_type,
260 ifn->if_xname,
261 (void *)ifa,
262 ifa->ifa_addr,
263 ifa_flags,
264 0);
265 if (sctp_ifa) {
266 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
267 }
268 }
269 IF_ADDR_RUNLOCK(ifn);
270 }
271 IFNET_RUNLOCK();
272 }
273
274 void
275 sctp_init_vrf_list(int vrfid)
276 {
277 if (vrfid > SCTP_MAX_VRF_ID)
278 /* can't do that */
279 return;
280
281 /* Don't care about return here */
282 (void)sctp_allocate_vrf(vrfid);
283
284 /*
285 * Now we need to build all the ifn's for this vrf and there
286 * addresses
287 */
288 sctp_init_ifns_for_vrf(vrfid);
289 }
290
291 void
292 sctp_addr_change(struct ifaddr *ifa, int cmd)
293 {
294 uint32_t ifa_flags = 0;
295
296 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
297 return;
298 }
299 /*
300 * BSD only has one VRF, if this changes we will need to hook in the
301 * right things here to get the id to pass to the address management
302 * routine.
303 */
304 if (SCTP_BASE_VAR(first_time) == 0) {
305 /* Special test to see if my ::1 will showup with this */
306 SCTP_BASE_VAR(first_time) = 1;
307 sctp_init_ifns_for_vrf(SCTP_DEFAULT_VRFID);
308 }
309 if ((cmd != RTM_ADD) && (cmd != RTM_DELETE)) {
310 /* don't know what to do with this */
311 return;
312 }
313 if (ifa->ifa_addr == NULL) {
314 return;
315 }
316 if (sctp_is_desired_interface_type(ifa->ifa_ifp) == 0) {
317 /* non desired type */
318 return;
319 }
320 switch (ifa->ifa_addr->sa_family) {
321 #ifdef INET
322 case AF_INET:
323 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
324 return;
325 }
326 break;
327 #endif
328 #ifdef INET6
329 case AF_INET6:
330 ifa_flags = ((struct in6_ifaddr *)ifa)->ia6_flags;
331 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
332 /* skip unspecifed addresses */
333 return;
334 }
335 break;
336 #endif
337 default:
338 /* non inet/inet6 skip */
339 return;
340 }
341 if (cmd == RTM_ADD) {
342 (void)sctp_add_addr_to_vrf(SCTP_DEFAULT_VRFID, (void *)ifa->ifa_ifp,
343 ifa->ifa_ifp->if_index, ifa->ifa_ifp->if_type, ifa->ifa_ifp->if_xname,
344 (void *)ifa, ifa->ifa_addr, ifa_flags, 1);
345 } else {
346
347 sctp_del_addr_from_vrf(SCTP_DEFAULT_VRFID, ifa->ifa_addr,
348 ifa->ifa_ifp->if_index,
349 ifa->ifa_ifp->if_xname);
350
351 /*
352 * We don't bump refcount here so when it completes the
353 * final delete will happen.
354 */
355 }
356 }
357
358 void
359 sctp_add_or_del_interfaces(int (*pred) (struct ifnet *), int add){
360 struct ifnet *ifn;
361 struct ifaddr *ifa;
362
363 IFNET_RLOCK();
364 TAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_list) {
365 if (!(*pred) (ifn)) {
366 continue;
367 }
368 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
369 sctp_addr_change(ifa, add ? RTM_ADD : RTM_DELETE);
370 }
371 }
372 IFNET_RUNLOCK();
373 }
374
375 struct mbuf *
376 sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header,
377 int how, int allonebuf, int type)
378 {
379 struct mbuf *m = NULL;
380
381 m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0);
382 if (m == NULL) {
383 /* bad, no memory */
384 return (m);
385 }
386 if (allonebuf) {
387 if (SCTP_BUF_SIZE(m) < space_needed) {
388 m_freem(m);
389 return (NULL);
390 }
391 }
392 if (SCTP_BUF_NEXT(m)) {
393 sctp_m_freem(SCTP_BUF_NEXT(m));
394 SCTP_BUF_NEXT(m) = NULL;
395 }
396 #ifdef SCTP_MBUF_LOGGING
397 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
398 sctp_log_mb(m, SCTP_MBUF_IALLOC);
399 }
400 #endif
401 return (m);
402 }
403
404
405 #ifdef SCTP_PACKET_LOGGING
406 void
407 sctp_packet_log(struct mbuf *m)
408 {
409 int *lenat, thisone;
410 void *copyto;
411 uint32_t *tick_tock;
412 int length;
413 int total_len;
414 int grabbed_lock = 0;
415 int value, newval, thisend, thisbegin;
416
417 /*
418 * Buffer layout. -sizeof this entry (total_len) -previous end
419 * (value) -ticks of log (ticks) o -ip packet o -as logged -
420 * where this started (thisbegin) x <--end points here
421 */
422 length = SCTP_HEADER_LEN(m);
423 total_len = SCTP_SIZE32((length + (4 * sizeof(int))));
424 /* Log a packet to the buffer. */
425 if (total_len > SCTP_PACKET_LOG_SIZE) {
426 /* Can't log this packet I have not a buffer big enough */
427 return;
428 }
429 if (length < (int)(SCTP_MIN_V4_OVERHEAD + sizeof(struct sctp_cookie_ack_chunk))) {
430 return;
431 }
432 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), 1);
433 try_again:
434 if (SCTP_BASE_VAR(packet_log_writers) > SCTP_PKTLOG_WRITERS_NEED_LOCK) {
435 SCTP_IP_PKTLOG_LOCK();
436 grabbed_lock = 1;
437 again_locked:
438 value = SCTP_BASE_VAR(packet_log_end);
439 newval = SCTP_BASE_VAR(packet_log_end) + total_len;
440 if (newval >= SCTP_PACKET_LOG_SIZE) {
441 /* we wrapped */
442 thisbegin = 0;
443 thisend = total_len;
444 } else {
445 thisbegin = SCTP_BASE_VAR(packet_log_end);
446 thisend = newval;
447 }
448 if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) {
449 goto again_locked;
450 }
451 } else {
452 value = SCTP_BASE_VAR(packet_log_end);
453 newval = SCTP_BASE_VAR(packet_log_end) + total_len;
454 if (newval >= SCTP_PACKET_LOG_SIZE) {
455 /* we wrapped */
456 thisbegin = 0;
457 thisend = total_len;
458 } else {
459 thisbegin = SCTP_BASE_VAR(packet_log_end);
460 thisend = newval;
461 }
462 if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) {
463 goto try_again;
464 }
465 }
466 /* Sanity check */
467 if (thisend >= SCTP_PACKET_LOG_SIZE) {
468 SCTP_PRINTF("Insanity stops a log thisbegin:%d thisend:%d writers:%d lock:%d end:%d\n",
469 thisbegin,
470 thisend,
471 SCTP_BASE_VAR(packet_log_writers),
472 grabbed_lock,
473 SCTP_BASE_VAR(packet_log_end));
474 SCTP_BASE_VAR(packet_log_end) = 0;
475 goto no_log;
476
477 }
478 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisbegin];
479 *lenat = total_len;
480 lenat++;
481 *lenat = value;
482 lenat++;
483 tick_tock = (uint32_t *) lenat;
484 lenat++;
485 *tick_tock = sctp_get_tick_count();
486 copyto = (void *)lenat;
487 thisone = thisend - sizeof(int);
488 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisone];
489 *lenat = thisbegin;
490 if (grabbed_lock) {
491 SCTP_IP_PKTLOG_UNLOCK();
492 grabbed_lock = 0;
493 }
494 m_copydata(m, 0, length, (caddr_t)copyto);
495 no_log:
496 if (grabbed_lock) {
497 SCTP_IP_PKTLOG_UNLOCK();
498 }
499 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers), 1);
500 }
501
502
503 int
504 sctp_copy_out_packet_log(uint8_t * target, int length)
505 {
506 /*
507 * We wind through the packet log starting at start copying up to
508 * length bytes out. We return the number of bytes copied.
509 */
510 int tocopy, this_copy;
511 int *lenat;
512 int did_delay = 0;
513
514 tocopy = length;
515 if (length < (int)(2 * sizeof(int))) {
516 /* not enough room */
517 return (0);
518 }
519 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
520 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), SCTP_PKTLOG_WRITERS_NEED_LOCK);
521 again:
522 if ((did_delay == 0) && (SCTP_BASE_VAR(packet_log_writers) != SCTP_PKTLOG_WRITERS_NEED_LOCK)) {
523 /*
524 * we delay here for just a moment hoping the
525 * writer(s) that were present when we entered will
526 * have left and we only have locking ones that will
527 * contend with us for the lock. This does not
528 * assure 100% access, but its good enough for a
529 * logging facility like this.
530 */
531 did_delay = 1;
532 DELAY(10);
533 goto again;
534 }
535 }
536 SCTP_IP_PKTLOG_LOCK();
537 lenat = (int *)target;
538 *lenat = SCTP_BASE_VAR(packet_log_end);
539 lenat++;
540 this_copy = min((length - sizeof(int)), SCTP_PACKET_LOG_SIZE);
541 memcpy((void *)lenat, (void *)SCTP_BASE_VAR(packet_log_buffer), this_copy);
542 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
543 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers),
544 SCTP_PKTLOG_WRITERS_NEED_LOCK);
545 }
546 SCTP_IP_PKTLOG_UNLOCK();
547 return (this_copy + sizeof(int));
548 }
549
550 #endif
Cache object: 0286baa0c58ca4eb267e732cf3152182
|