1/*-
2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2011, 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/* $KAME: sctp_output.c,v 1.46 2005/03/06 16:04:17 itojun Exp $ */
34
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD: head/sys/netinet/sctp_bsd_addr.c 234995 2012-05-04 09:27:00Z tuexen $");
37
38#include <netinet/sctp_os.h>
39#include <netinet/sctp_var.h>
40#include <netinet/sctp_pcb.h>
41#include <netinet/sctp_header.h>
42#include <netinet/sctputil.h>
43#include <netinet/sctp_output.h>
44#include <netinet/sctp_bsd_addr.h>
45#include <netinet/sctp_uio.h>
46#include <netinet/sctputil.h>
47#include <netinet/sctp_timer.h>
48#include <netinet/sctp_asconf.h>
49#include <netinet/sctp_sysctl.h>
50#include <netinet/sctp_indata.h>
51#include <sys/unistd.h>
52
53/* Declare all of our malloc named types */
54MALLOC_DEFINE(SCTP_M_MAP, "sctp_map", "sctp asoc map descriptor");
55MALLOC_DEFINE(SCTP_M_STRMI, "sctp_stri", "sctp stream in array");
56MALLOC_DEFINE(SCTP_M_STRMO, "sctp_stro", "sctp stream out array");
57MALLOC_DEFINE(SCTP_M_ASC_ADDR, "sctp_aadr", "sctp asconf address");
58MALLOC_DEFINE(SCTP_M_ASC_IT, "sctp_a_it", "sctp asconf iterator");
59MALLOC_DEFINE(SCTP_M_AUTH_CL, "sctp_atcl", "sctp auth chunklist");
60MALLOC_DEFINE(SCTP_M_AUTH_KY, "sctp_atky", "sctp auth key");
61MALLOC_DEFINE(SCTP_M_AUTH_HL, "sctp_athm", "sctp auth hmac list");
62MALLOC_DEFINE(SCTP_M_AUTH_IF, "sctp_athi", "sctp auth info");
63MALLOC_DEFINE(SCTP_M_STRESET, "sctp_stre", "sctp stream reset");
64MALLOC_DEFINE(SCTP_M_CMSG, "sctp_cmsg", "sctp CMSG buffer");
65MALLOC_DEFINE(SCTP_M_COPYAL, "sctp_cpal", "sctp copy all");
66MALLOC_DEFINE(SCTP_M_VRF, "sctp_vrf", "sctp vrf struct");
67MALLOC_DEFINE(SCTP_M_IFA, "sctp_ifa", "sctp ifa struct");
68MALLOC_DEFINE(SCTP_M_IFN, "sctp_ifn", "sctp ifn struct");
69MALLOC_DEFINE(SCTP_M_TIMW, "sctp_timw", "sctp time block");
70MALLOC_DEFINE(SCTP_M_MVRF, "sctp_mvrf", "sctp mvrf pcb list");
71MALLOC_DEFINE(SCTP_M_ITER, "sctp_iter", "sctp iterator control");
72MALLOC_DEFINE(SCTP_M_SOCKOPT, "sctp_socko", "sctp socket option");
73MALLOC_DEFINE(SCTP_M_MCORE, "sctp_mcore", "sctp mcore queue");
74
75/* Global NON-VNET structure that controls the iterator */
76struct iterator_control sctp_it_ctl;
77
78
79void
80sctp_wakeup_iterator(void)
81{
82 wakeup(&sctp_it_ctl.iterator_running);
83}
84
85static void
86sctp_iterator_thread(void *v SCTP_UNUSED)
87{
88 SCTP_IPI_ITERATOR_WQ_LOCK();
89 /* In FreeBSD this thread never terminates. */
90 for (;;) {
91 msleep(&sctp_it_ctl.iterator_running,
92 &sctp_it_ctl.ipi_iterator_wq_mtx,
93 0, "waiting_for_work", 0);
94 sctp_iterator_worker();
95 }
96}
97
98void
99sctp_startup_iterator(void)
100{
101 static int called = 0;
102 int ret;
103
104 if (called) {
105 /* You only get one */
106 return;
107 }
108 /* init the iterator head */
109 called = 1;
110 sctp_it_ctl.iterator_running = 0;
111 sctp_it_ctl.iterator_flags = 0;
112 sctp_it_ctl.cur_it = NULL;
113 SCTP_ITERATOR_LOCK_INIT();
114 SCTP_IPI_ITERATOR_WQ_INIT();
115 TAILQ_INIT(&sctp_it_ctl.iteratorhead);
116 ret = kproc_create(sctp_iterator_thread,
117 (void *)NULL,
118 &sctp_it_ctl.thread_proc,
119 RFPROC,
120 SCTP_KTHREAD_PAGES,
121 SCTP_KTRHEAD_NAME);
122}
123
124#ifdef INET6
125
126void
127sctp_gather_internal_ifa_flags(struct sctp_ifa *ifa)
128{
129 struct in6_ifaddr *ifa6;
130
131 ifa6 = (struct in6_ifaddr *)ifa->ifa;
132 ifa->flags = ifa6->ia6_flags;
133 if (!MODULE_GLOBAL(ip6_use_deprecated)) {
134 if (ifa->flags &
135 IN6_IFF_DEPRECATED) {
136 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
137 } else {
138 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
139 }
140 } else {
141 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
142 }
143 if (ifa->flags &
144 (IN6_IFF_DETACHED |
145 IN6_IFF_ANYCAST |
146 IN6_IFF_NOTREADY)) {
147 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
148 } else {
149 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
150 }
151}
152
153#endif /* INET6 */
154
155
156static uint32_t
157sctp_is_desired_interface_type(struct ifaddr *ifa)
158{
159 int result;
160
161 /* check the interface type to see if it's one we care about */
162 switch (ifa->ifa_ifp->if_type) {
163 case IFT_ETHER:
164 case IFT_ISO88023:
165 case IFT_ISO88024:
166 case IFT_ISO88025:
167 case IFT_ISO88026:
168 case IFT_STARLAN:
169 case IFT_P10:
170 case IFT_P80:
171 case IFT_HY:
172 case IFT_FDDI:
173 case IFT_XETHER:
174 case IFT_ISDNBASIC:
175 case IFT_ISDNPRIMARY:
176 case IFT_PTPSERIAL:
177 case IFT_OTHER:
178 case IFT_PPP:
179 case IFT_LOOP:
180 case IFT_SLIP:
181 case IFT_GIF:
182 case IFT_L2VLAN:
183 case IFT_STF:
184 case IFT_IP:
185 case IFT_IPOVERCDLC:
186 case IFT_IPOVERCLAW:
187 case IFT_PROPVIRTUAL: /* NetGraph Virtual too */
188 case IFT_VIRTUALIPADDRESS:
189 result = 1;
190 break;
191 default:
192 result = 0;
193 }
194
195 return (result);
196}
197
198
199
200
201static void
202sctp_init_ifns_for_vrf(int vrfid)
203{
204 /*
205 * Here we must apply ANY locks needed by the IFN we access and also
206 * make sure we lock any IFA that exists as we float through the
207 * list of IFA's
208 */
209 struct ifnet *ifn;
210 struct ifaddr *ifa;
211 struct sctp_ifa *sctp_ifa;
212 uint32_t ifa_flags;
213
214#ifdef INET6
215 struct in6_ifaddr *ifa6;
216
217#endif
218
219 IFNET_RLOCK();
220 TAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_list) {
221 IF_ADDR_RLOCK(ifn);
222 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
223 if (ifa->ifa_addr == NULL) {
224 continue;
225 }
226 switch (ifa->ifa_addr->sa_family) {
227#ifdef INET
228 case AF_INET:
229 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
230 continue;
231 }
232 break;
233#endif
234#ifdef INET6
235 case AF_INET6:
236 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
237 /* skip unspecifed addresses */
238 continue;
239 }
240 break;
241#endif
242 default:
243 continue;
244 }
245 if (sctp_is_desired_interface_type(ifa) == 0) {
246 /* non desired type */
247 continue;
248 }
249 switch (ifa->ifa_addr->sa_family) {
250#ifdef INET
251 case AF_INET:
252 ifa_flags = 0;
253 break;
254#endif
255#ifdef INET6
256 case AF_INET6:
257 ifa6 = (struct in6_ifaddr *)ifa;
258 ifa_flags = ifa6->ia6_flags;
259 break;
260#endif
261 default:
262 ifa_flags = 0;
263 break;
264 }
265 sctp_ifa = sctp_add_addr_to_vrf(vrfid,
266 (void *)ifn,
267 ifn->if_index,
268 ifn->if_type,
269 ifn->if_xname,
270 (void *)ifa,
271 ifa->ifa_addr,
272 ifa_flags,
273 0);
274 if (sctp_ifa) {
275 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
276 }
277 }
278 IF_ADDR_RUNLOCK(ifn);
279 }
280 IFNET_RUNLOCK();
281}
282
283void
284sctp_init_vrf_list(int vrfid)
285{
286 if (vrfid > SCTP_MAX_VRF_ID)
287 /* can't do that */
288 return;
289
290 /* Don't care about return here */
291 (void)sctp_allocate_vrf(vrfid);
292
293 /*
294 * Now we need to build all the ifn's for this vrf and there
295 * addresses
296 */
297 sctp_init_ifns_for_vrf(vrfid);
298}
299
300void
301sctp_addr_change(struct ifaddr *ifa, int cmd)
302{
303 uint32_t ifa_flags = 0;
304
305 /*
306 * BSD only has one VRF, if this changes we will need to hook in the
307 * right things here to get the id to pass to the address managment
308 * routine.
309 */
310 if (SCTP_BASE_VAR(first_time) == 0) {
311 /* Special test to see if my ::1 will showup with this */
312 SCTP_BASE_VAR(first_time) = 1;
313 sctp_init_ifns_for_vrf(SCTP_DEFAULT_VRFID);
314 }
315 if ((cmd != RTM_ADD) && (cmd != RTM_DELETE)) {
316 /* don't know what to do with this */
317 return;
318 }
319 if (ifa->ifa_addr == NULL) {
320 return;
321 }
322 switch (ifa->ifa_addr->sa_family) {
323#ifdef INET
324 case AF_INET:
325 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
326 return;
327 }
328 break;
329#endif
330#ifdef INET6
331 case AF_INET6:
332 ifa_flags = ((struct in6_ifaddr *)ifa)->ia6_flags;
333 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
334 /* skip unspecifed addresses */
335 return;
336 }
337 break;
338#endif
339 default:
340 /* non inet/inet6 skip */
341 return;
342 }
343
344 if (sctp_is_desired_interface_type(ifa) == 0) {
345 /* non desired type */
346 return;
347 }
348 if (cmd == RTM_ADD) {
349 (void)sctp_add_addr_to_vrf(SCTP_DEFAULT_VRFID, (void *)ifa->ifa_ifp,
350 ifa->ifa_ifp->if_index, ifa->ifa_ifp->if_type,
351 ifa->ifa_ifp->if_xname,
352 (void *)ifa, ifa->ifa_addr, ifa_flags, 1);
353 } else {
354
355 sctp_del_addr_from_vrf(SCTP_DEFAULT_VRFID, ifa->ifa_addr,
356 ifa->ifa_ifp->if_index,
357 ifa->ifa_ifp->if_xname
358 );
359 /*
360 * We don't bump refcount here so when it completes the
361 * final delete will happen.
362 */
363 }
364}
365
366void
367 sctp_add_or_del_interfaces(int (*pred) (struct ifnet *), int add){
368 struct ifnet *ifn;
369 struct ifaddr *ifa;
370
371 IFNET_RLOCK();
372 TAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_list) {
373 if (!(*pred) (ifn)) {
374 continue;
375 }
376 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
377 sctp_addr_change(ifa, add ? RTM_ADD : RTM_DELETE);
378 }
379 }
380 IFNET_RUNLOCK();
381}
382
383struct mbuf *
384sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header,
385 int how, int allonebuf, int type)
386{
387 struct mbuf *m = NULL;
388
389 m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0);
390 if (m == NULL) {
391 /* bad, no memory */
392 return (m);
393 }
394 if (allonebuf) {
395 int siz;
396
397 if (SCTP_BUF_IS_EXTENDED(m)) {
398 siz = SCTP_BUF_EXTEND_SIZE(m);
399 } else {
400 if (want_header)
401 siz = MHLEN;
402 else
403 siz = MLEN;
404 }
405 if (siz < space_needed) {
406 m_freem(m);
407 return (NULL);
408 }
409 }
410 if (SCTP_BUF_NEXT(m)) {
411 sctp_m_freem(SCTP_BUF_NEXT(m));
412 SCTP_BUF_NEXT(m) = NULL;
413 }
414#ifdef SCTP_MBUF_LOGGING
415 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
416 if (SCTP_BUF_IS_EXTENDED(m)) {
417 sctp_log_mb(m, SCTP_MBUF_IALLOC);
418 }
419 }
420#endif
421 return (m);
422}
423
424
425#ifdef SCTP_PACKET_LOGGING
426void
427sctp_packet_log(struct mbuf *m, int length)
428{
429 int *lenat, thisone;
430 void *copyto;
431 uint32_t *tick_tock;
432 int total_len;
433 int grabbed_lock = 0;
434 int value, newval, thisend, thisbegin;
435
436 /*
437 * Buffer layout. -sizeof this entry (total_len) -previous end
438 * (value) -ticks of log (ticks) o -ip packet o -as logged -
439 * where this started (thisbegin) x <--end points here
440 */
441 total_len = SCTP_SIZE32((length + (4 * sizeof(int))));
442 /* Log a packet to the buffer. */
443 if (total_len > SCTP_PACKET_LOG_SIZE) {
444 /* Can't log this packet I have not a buffer big enough */
445 return;
446 }
447 if (length < (int)(SCTP_MIN_V4_OVERHEAD + sizeof(struct sctp_cookie_ack_chunk))) {
448 return;
449 }
450 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), 1);
451try_again:
452 if (SCTP_BASE_VAR(packet_log_writers) > SCTP_PKTLOG_WRITERS_NEED_LOCK) {
453 SCTP_IP_PKTLOG_LOCK();
454 grabbed_lock = 1;
455again_locked:
456 value = SCTP_BASE_VAR(packet_log_end);
457 newval = SCTP_BASE_VAR(packet_log_end) + total_len;
458 if (newval >= SCTP_PACKET_LOG_SIZE) {
459 /* we wrapped */
460 thisbegin = 0;
461 thisend = total_len;
462 } else {
463 thisbegin = SCTP_BASE_VAR(packet_log_end);
464 thisend = newval;
465 }
466 if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) {
467 goto again_locked;
468 }
469 } else {
470 value = SCTP_BASE_VAR(packet_log_end);
471 newval = SCTP_BASE_VAR(packet_log_end) + total_len;
472 if (newval >= SCTP_PACKET_LOG_SIZE) {
473 /* we wrapped */
474 thisbegin = 0;
475 thisend = total_len;
476 } else {
477 thisbegin = SCTP_BASE_VAR(packet_log_end);
478 thisend = newval;
479 }
480 if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) {
481 goto try_again;
482 }
483 }
484 /* Sanity check */
485 if (thisend >= SCTP_PACKET_LOG_SIZE) {
486 SCTP_PRINTF("Insanity stops a log thisbegin:%d thisend:%d writers:%d lock:%d end:%d\n",
487 thisbegin,
488 thisend,
489 SCTP_BASE_VAR(packet_log_writers),
490 grabbed_lock,
491 SCTP_BASE_VAR(packet_log_end));
492 SCTP_BASE_VAR(packet_log_end) = 0;
493 goto no_log;
494
495 }
496 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisbegin];
497 *lenat = total_len;
498 lenat++;
499 *lenat = value;
500 lenat++;
501 tick_tock = (uint32_t *) lenat;
502 lenat++;
503 *tick_tock = sctp_get_tick_count();
504 copyto = (void *)lenat;
505 thisone = thisend - sizeof(int);
506 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisone];
507 *lenat = thisbegin;
508 if (grabbed_lock) {
509 SCTP_IP_PKTLOG_UNLOCK();
510 grabbed_lock = 0;
511 }
512 m_copydata(m, 0, length, (caddr_t)copyto);
513no_log:
514 if (grabbed_lock) {
515 SCTP_IP_PKTLOG_UNLOCK();
516 }
517 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers), 1);
518}
519
520
521int
522sctp_copy_out_packet_log(uint8_t * target, int length)
523{
524 /*
525 * We wind through the packet log starting at start copying up to
526 * length bytes out. We return the number of bytes copied.
527 */
528 int tocopy, this_copy;
529 int *lenat;
530 int did_delay = 0;
531
532 tocopy = length;
533 if (length < (int)(2 * sizeof(int))) {
534 /* not enough room */
535 return (0);
536 }
537 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
538 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), SCTP_PKTLOG_WRITERS_NEED_LOCK);
539again:
540 if ((did_delay == 0) && (SCTP_BASE_VAR(packet_log_writers) != SCTP_PKTLOG_WRITERS_NEED_LOCK)) {
541 /*
542 * we delay here for just a moment hoping the
543 * writer(s) that were present when we entered will
544 * have left and we only have locking ones that will
545 * contend with us for the lock. This does not
546 * assure 100% access, but its good enough for a
547 * logging facility like this.
548 */
549 did_delay = 1;
550 DELAY(10);
551 goto again;
552 }
553 }
554 SCTP_IP_PKTLOG_LOCK();
555 lenat = (int *)target;
556 *lenat = SCTP_BASE_VAR(packet_log_end);
557 lenat++;
558 this_copy = min((length - sizeof(int)), SCTP_PACKET_LOG_SIZE);
559 memcpy((void *)lenat, (void *)SCTP_BASE_VAR(packet_log_buffer), this_copy);
560 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
561 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers),
562 SCTP_PKTLOG_WRITERS_NEED_LOCK);
563 }
564 SCTP_IP_PKTLOG_UNLOCK();
565 return (this_copy + sizeof(int));
566}
567
568#endif
2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2011, 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/* $KAME: sctp_output.c,v 1.46 2005/03/06 16:04:17 itojun Exp $ */
34
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD: head/sys/netinet/sctp_bsd_addr.c 234995 2012-05-04 09:27:00Z tuexen $");
37
38#include <netinet/sctp_os.h>
39#include <netinet/sctp_var.h>
40#include <netinet/sctp_pcb.h>
41#include <netinet/sctp_header.h>
42#include <netinet/sctputil.h>
43#include <netinet/sctp_output.h>
44#include <netinet/sctp_bsd_addr.h>
45#include <netinet/sctp_uio.h>
46#include <netinet/sctputil.h>
47#include <netinet/sctp_timer.h>
48#include <netinet/sctp_asconf.h>
49#include <netinet/sctp_sysctl.h>
50#include <netinet/sctp_indata.h>
51#include <sys/unistd.h>
52
53/* Declare all of our malloc named types */
54MALLOC_DEFINE(SCTP_M_MAP, "sctp_map", "sctp asoc map descriptor");
55MALLOC_DEFINE(SCTP_M_STRMI, "sctp_stri", "sctp stream in array");
56MALLOC_DEFINE(SCTP_M_STRMO, "sctp_stro", "sctp stream out array");
57MALLOC_DEFINE(SCTP_M_ASC_ADDR, "sctp_aadr", "sctp asconf address");
58MALLOC_DEFINE(SCTP_M_ASC_IT, "sctp_a_it", "sctp asconf iterator");
59MALLOC_DEFINE(SCTP_M_AUTH_CL, "sctp_atcl", "sctp auth chunklist");
60MALLOC_DEFINE(SCTP_M_AUTH_KY, "sctp_atky", "sctp auth key");
61MALLOC_DEFINE(SCTP_M_AUTH_HL, "sctp_athm", "sctp auth hmac list");
62MALLOC_DEFINE(SCTP_M_AUTH_IF, "sctp_athi", "sctp auth info");
63MALLOC_DEFINE(SCTP_M_STRESET, "sctp_stre", "sctp stream reset");
64MALLOC_DEFINE(SCTP_M_CMSG, "sctp_cmsg", "sctp CMSG buffer");
65MALLOC_DEFINE(SCTP_M_COPYAL, "sctp_cpal", "sctp copy all");
66MALLOC_DEFINE(SCTP_M_VRF, "sctp_vrf", "sctp vrf struct");
67MALLOC_DEFINE(SCTP_M_IFA, "sctp_ifa", "sctp ifa struct");
68MALLOC_DEFINE(SCTP_M_IFN, "sctp_ifn", "sctp ifn struct");
69MALLOC_DEFINE(SCTP_M_TIMW, "sctp_timw", "sctp time block");
70MALLOC_DEFINE(SCTP_M_MVRF, "sctp_mvrf", "sctp mvrf pcb list");
71MALLOC_DEFINE(SCTP_M_ITER, "sctp_iter", "sctp iterator control");
72MALLOC_DEFINE(SCTP_M_SOCKOPT, "sctp_socko", "sctp socket option");
73MALLOC_DEFINE(SCTP_M_MCORE, "sctp_mcore", "sctp mcore queue");
74
75/* Global NON-VNET structure that controls the iterator */
76struct iterator_control sctp_it_ctl;
77
78
79void
80sctp_wakeup_iterator(void)
81{
82 wakeup(&sctp_it_ctl.iterator_running);
83}
84
85static void
86sctp_iterator_thread(void *v SCTP_UNUSED)
87{
88 SCTP_IPI_ITERATOR_WQ_LOCK();
89 /* In FreeBSD this thread never terminates. */
90 for (;;) {
91 msleep(&sctp_it_ctl.iterator_running,
92 &sctp_it_ctl.ipi_iterator_wq_mtx,
93 0, "waiting_for_work", 0);
94 sctp_iterator_worker();
95 }
96}
97
98void
99sctp_startup_iterator(void)
100{
101 static int called = 0;
102 int ret;
103
104 if (called) {
105 /* You only get one */
106 return;
107 }
108 /* init the iterator head */
109 called = 1;
110 sctp_it_ctl.iterator_running = 0;
111 sctp_it_ctl.iterator_flags = 0;
112 sctp_it_ctl.cur_it = NULL;
113 SCTP_ITERATOR_LOCK_INIT();
114 SCTP_IPI_ITERATOR_WQ_INIT();
115 TAILQ_INIT(&sctp_it_ctl.iteratorhead);
116 ret = kproc_create(sctp_iterator_thread,
117 (void *)NULL,
118 &sctp_it_ctl.thread_proc,
119 RFPROC,
120 SCTP_KTHREAD_PAGES,
121 SCTP_KTRHEAD_NAME);
122}
123
124#ifdef INET6
125
126void
127sctp_gather_internal_ifa_flags(struct sctp_ifa *ifa)
128{
129 struct in6_ifaddr *ifa6;
130
131 ifa6 = (struct in6_ifaddr *)ifa->ifa;
132 ifa->flags = ifa6->ia6_flags;
133 if (!MODULE_GLOBAL(ip6_use_deprecated)) {
134 if (ifa->flags &
135 IN6_IFF_DEPRECATED) {
136 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
137 } else {
138 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
139 }
140 } else {
141 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
142 }
143 if (ifa->flags &
144 (IN6_IFF_DETACHED |
145 IN6_IFF_ANYCAST |
146 IN6_IFF_NOTREADY)) {
147 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
148 } else {
149 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
150 }
151}
152
153#endif /* INET6 */
154
155
156static uint32_t
157sctp_is_desired_interface_type(struct ifaddr *ifa)
158{
159 int result;
160
161 /* check the interface type to see if it's one we care about */
162 switch (ifa->ifa_ifp->if_type) {
163 case IFT_ETHER:
164 case IFT_ISO88023:
165 case IFT_ISO88024:
166 case IFT_ISO88025:
167 case IFT_ISO88026:
168 case IFT_STARLAN:
169 case IFT_P10:
170 case IFT_P80:
171 case IFT_HY:
172 case IFT_FDDI:
173 case IFT_XETHER:
174 case IFT_ISDNBASIC:
175 case IFT_ISDNPRIMARY:
176 case IFT_PTPSERIAL:
177 case IFT_OTHER:
178 case IFT_PPP:
179 case IFT_LOOP:
180 case IFT_SLIP:
181 case IFT_GIF:
182 case IFT_L2VLAN:
183 case IFT_STF:
184 case IFT_IP:
185 case IFT_IPOVERCDLC:
186 case IFT_IPOVERCLAW:
187 case IFT_PROPVIRTUAL: /* NetGraph Virtual too */
188 case IFT_VIRTUALIPADDRESS:
189 result = 1;
190 break;
191 default:
192 result = 0;
193 }
194
195 return (result);
196}
197
198
199
200
201static void
202sctp_init_ifns_for_vrf(int vrfid)
203{
204 /*
205 * Here we must apply ANY locks needed by the IFN we access and also
206 * make sure we lock any IFA that exists as we float through the
207 * list of IFA's
208 */
209 struct ifnet *ifn;
210 struct ifaddr *ifa;
211 struct sctp_ifa *sctp_ifa;
212 uint32_t ifa_flags;
213
214#ifdef INET6
215 struct in6_ifaddr *ifa6;
216
217#endif
218
219 IFNET_RLOCK();
220 TAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_list) {
221 IF_ADDR_RLOCK(ifn);
222 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
223 if (ifa->ifa_addr == NULL) {
224 continue;
225 }
226 switch (ifa->ifa_addr->sa_family) {
227#ifdef INET
228 case AF_INET:
229 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
230 continue;
231 }
232 break;
233#endif
234#ifdef INET6
235 case AF_INET6:
236 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
237 /* skip unspecifed addresses */
238 continue;
239 }
240 break;
241#endif
242 default:
243 continue;
244 }
245 if (sctp_is_desired_interface_type(ifa) == 0) {
246 /* non desired type */
247 continue;
248 }
249 switch (ifa->ifa_addr->sa_family) {
250#ifdef INET
251 case AF_INET:
252 ifa_flags = 0;
253 break;
254#endif
255#ifdef INET6
256 case AF_INET6:
257 ifa6 = (struct in6_ifaddr *)ifa;
258 ifa_flags = ifa6->ia6_flags;
259 break;
260#endif
261 default:
262 ifa_flags = 0;
263 break;
264 }
265 sctp_ifa = sctp_add_addr_to_vrf(vrfid,
266 (void *)ifn,
267 ifn->if_index,
268 ifn->if_type,
269 ifn->if_xname,
270 (void *)ifa,
271 ifa->ifa_addr,
272 ifa_flags,
273 0);
274 if (sctp_ifa) {
275 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
276 }
277 }
278 IF_ADDR_RUNLOCK(ifn);
279 }
280 IFNET_RUNLOCK();
281}
282
283void
284sctp_init_vrf_list(int vrfid)
285{
286 if (vrfid > SCTP_MAX_VRF_ID)
287 /* can't do that */
288 return;
289
290 /* Don't care about return here */
291 (void)sctp_allocate_vrf(vrfid);
292
293 /*
294 * Now we need to build all the ifn's for this vrf and there
295 * addresses
296 */
297 sctp_init_ifns_for_vrf(vrfid);
298}
299
300void
301sctp_addr_change(struct ifaddr *ifa, int cmd)
302{
303 uint32_t ifa_flags = 0;
304
305 /*
306 * BSD only has one VRF, if this changes we will need to hook in the
307 * right things here to get the id to pass to the address managment
308 * routine.
309 */
310 if (SCTP_BASE_VAR(first_time) == 0) {
311 /* Special test to see if my ::1 will showup with this */
312 SCTP_BASE_VAR(first_time) = 1;
313 sctp_init_ifns_for_vrf(SCTP_DEFAULT_VRFID);
314 }
315 if ((cmd != RTM_ADD) && (cmd != RTM_DELETE)) {
316 /* don't know what to do with this */
317 return;
318 }
319 if (ifa->ifa_addr == NULL) {
320 return;
321 }
322 switch (ifa->ifa_addr->sa_family) {
323#ifdef INET
324 case AF_INET:
325 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
326 return;
327 }
328 break;
329#endif
330#ifdef INET6
331 case AF_INET6:
332 ifa_flags = ((struct in6_ifaddr *)ifa)->ia6_flags;
333 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
334 /* skip unspecifed addresses */
335 return;
336 }
337 break;
338#endif
339 default:
340 /* non inet/inet6 skip */
341 return;
342 }
343
344 if (sctp_is_desired_interface_type(ifa) == 0) {
345 /* non desired type */
346 return;
347 }
348 if (cmd == RTM_ADD) {
349 (void)sctp_add_addr_to_vrf(SCTP_DEFAULT_VRFID, (void *)ifa->ifa_ifp,
350 ifa->ifa_ifp->if_index, ifa->ifa_ifp->if_type,
351 ifa->ifa_ifp->if_xname,
352 (void *)ifa, ifa->ifa_addr, ifa_flags, 1);
353 } else {
354
355 sctp_del_addr_from_vrf(SCTP_DEFAULT_VRFID, ifa->ifa_addr,
356 ifa->ifa_ifp->if_index,
357 ifa->ifa_ifp->if_xname
358 );
359 /*
360 * We don't bump refcount here so when it completes the
361 * final delete will happen.
362 */
363 }
364}
365
366void
367 sctp_add_or_del_interfaces(int (*pred) (struct ifnet *), int add){
368 struct ifnet *ifn;
369 struct ifaddr *ifa;
370
371 IFNET_RLOCK();
372 TAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_list) {
373 if (!(*pred) (ifn)) {
374 continue;
375 }
376 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
377 sctp_addr_change(ifa, add ? RTM_ADD : RTM_DELETE);
378 }
379 }
380 IFNET_RUNLOCK();
381}
382
383struct mbuf *
384sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header,
385 int how, int allonebuf, int type)
386{
387 struct mbuf *m = NULL;
388
389 m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0);
390 if (m == NULL) {
391 /* bad, no memory */
392 return (m);
393 }
394 if (allonebuf) {
395 int siz;
396
397 if (SCTP_BUF_IS_EXTENDED(m)) {
398 siz = SCTP_BUF_EXTEND_SIZE(m);
399 } else {
400 if (want_header)
401 siz = MHLEN;
402 else
403 siz = MLEN;
404 }
405 if (siz < space_needed) {
406 m_freem(m);
407 return (NULL);
408 }
409 }
410 if (SCTP_BUF_NEXT(m)) {
411 sctp_m_freem(SCTP_BUF_NEXT(m));
412 SCTP_BUF_NEXT(m) = NULL;
413 }
414#ifdef SCTP_MBUF_LOGGING
415 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
416 if (SCTP_BUF_IS_EXTENDED(m)) {
417 sctp_log_mb(m, SCTP_MBUF_IALLOC);
418 }
419 }
420#endif
421 return (m);
422}
423
424
425#ifdef SCTP_PACKET_LOGGING
426void
427sctp_packet_log(struct mbuf *m, int length)
428{
429 int *lenat, thisone;
430 void *copyto;
431 uint32_t *tick_tock;
432 int total_len;
433 int grabbed_lock = 0;
434 int value, newval, thisend, thisbegin;
435
436 /*
437 * Buffer layout. -sizeof this entry (total_len) -previous end
438 * (value) -ticks of log (ticks) o -ip packet o -as logged -
439 * where this started (thisbegin) x <--end points here
440 */
441 total_len = SCTP_SIZE32((length + (4 * sizeof(int))));
442 /* Log a packet to the buffer. */
443 if (total_len > SCTP_PACKET_LOG_SIZE) {
444 /* Can't log this packet I have not a buffer big enough */
445 return;
446 }
447 if (length < (int)(SCTP_MIN_V4_OVERHEAD + sizeof(struct sctp_cookie_ack_chunk))) {
448 return;
449 }
450 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), 1);
451try_again:
452 if (SCTP_BASE_VAR(packet_log_writers) > SCTP_PKTLOG_WRITERS_NEED_LOCK) {
453 SCTP_IP_PKTLOG_LOCK();
454 grabbed_lock = 1;
455again_locked:
456 value = SCTP_BASE_VAR(packet_log_end);
457 newval = SCTP_BASE_VAR(packet_log_end) + total_len;
458 if (newval >= SCTP_PACKET_LOG_SIZE) {
459 /* we wrapped */
460 thisbegin = 0;
461 thisend = total_len;
462 } else {
463 thisbegin = SCTP_BASE_VAR(packet_log_end);
464 thisend = newval;
465 }
466 if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) {
467 goto again_locked;
468 }
469 } else {
470 value = SCTP_BASE_VAR(packet_log_end);
471 newval = SCTP_BASE_VAR(packet_log_end) + total_len;
472 if (newval >= SCTP_PACKET_LOG_SIZE) {
473 /* we wrapped */
474 thisbegin = 0;
475 thisend = total_len;
476 } else {
477 thisbegin = SCTP_BASE_VAR(packet_log_end);
478 thisend = newval;
479 }
480 if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) {
481 goto try_again;
482 }
483 }
484 /* Sanity check */
485 if (thisend >= SCTP_PACKET_LOG_SIZE) {
486 SCTP_PRINTF("Insanity stops a log thisbegin:%d thisend:%d writers:%d lock:%d end:%d\n",
487 thisbegin,
488 thisend,
489 SCTP_BASE_VAR(packet_log_writers),
490 grabbed_lock,
491 SCTP_BASE_VAR(packet_log_end));
492 SCTP_BASE_VAR(packet_log_end) = 0;
493 goto no_log;
494
495 }
496 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisbegin];
497 *lenat = total_len;
498 lenat++;
499 *lenat = value;
500 lenat++;
501 tick_tock = (uint32_t *) lenat;
502 lenat++;
503 *tick_tock = sctp_get_tick_count();
504 copyto = (void *)lenat;
505 thisone = thisend - sizeof(int);
506 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisone];
507 *lenat = thisbegin;
508 if (grabbed_lock) {
509 SCTP_IP_PKTLOG_UNLOCK();
510 grabbed_lock = 0;
511 }
512 m_copydata(m, 0, length, (caddr_t)copyto);
513no_log:
514 if (grabbed_lock) {
515 SCTP_IP_PKTLOG_UNLOCK();
516 }
517 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers), 1);
518}
519
520
521int
522sctp_copy_out_packet_log(uint8_t * target, int length)
523{
524 /*
525 * We wind through the packet log starting at start copying up to
526 * length bytes out. We return the number of bytes copied.
527 */
528 int tocopy, this_copy;
529 int *lenat;
530 int did_delay = 0;
531
532 tocopy = length;
533 if (length < (int)(2 * sizeof(int))) {
534 /* not enough room */
535 return (0);
536 }
537 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
538 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), SCTP_PKTLOG_WRITERS_NEED_LOCK);
539again:
540 if ((did_delay == 0) && (SCTP_BASE_VAR(packet_log_writers) != SCTP_PKTLOG_WRITERS_NEED_LOCK)) {
541 /*
542 * we delay here for just a moment hoping the
543 * writer(s) that were present when we entered will
544 * have left and we only have locking ones that will
545 * contend with us for the lock. This does not
546 * assure 100% access, but its good enough for a
547 * logging facility like this.
548 */
549 did_delay = 1;
550 DELAY(10);
551 goto again;
552 }
553 }
554 SCTP_IP_PKTLOG_LOCK();
555 lenat = (int *)target;
556 *lenat = SCTP_BASE_VAR(packet_log_end);
557 lenat++;
558 this_copy = min((length - sizeof(int)), SCTP_PACKET_LOG_SIZE);
559 memcpy((void *)lenat, (void *)SCTP_BASE_VAR(packet_log_buffer), this_copy);
560 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
561 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers),
562 SCTP_PKTLOG_WRITERS_NEED_LOCK);
563 }
564 SCTP_IP_PKTLOG_UNLOCK();
565 return (this_copy + sizeof(int));
566}
567
568#endif