1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 *
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
17 *
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #ifdef __FreeBSD__
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD: head/sys/netinet/sctp_bsd_addr.c 358080 2020-02-18 19:41:55Z tuexen $");
38 #endif
39
40 #include <netinet/sctp_os.h>
41 #include <netinet/sctp_var.h>
42 #include <netinet/sctp_pcb.h>
43 #include <netinet/sctp_header.h>
44 #include <netinet/sctputil.h>
45 #include <netinet/sctp_output.h>
46 #include <netinet/sctp_bsd_addr.h>
47 #include <netinet/sctp_uio.h>
48 #include <netinet/sctputil.h>
49 #include <netinet/sctp_timer.h>
50 #include <netinet/sctp_asconf.h>
51 #include <netinet/sctp_sysctl.h>
52 #include <netinet/sctp_indata.h>
53 #if defined(__FreeBSD__)
54 #include <sys/unistd.h>
55 #endif
56
57 /* Declare all of our malloc named types */
58 #ifndef __Panda__
59 MALLOC_DEFINE(SCTP_M_MAP, "sctp_map", "sctp asoc map descriptor");
60 MALLOC_DEFINE(SCTP_M_STRMI, "sctp_stri", "sctp stream in array");
61 MALLOC_DEFINE(SCTP_M_STRMO, "sctp_stro", "sctp stream out array");
62 MALLOC_DEFINE(SCTP_M_ASC_ADDR, "sctp_aadr", "sctp asconf address");
63 MALLOC_DEFINE(SCTP_M_ASC_IT, "sctp_a_it", "sctp asconf iterator");
64 MALLOC_DEFINE(SCTP_M_AUTH_CL, "sctp_atcl", "sctp auth chunklist");
65 MALLOC_DEFINE(SCTP_M_AUTH_KY, "sctp_atky", "sctp auth key");
66 MALLOC_DEFINE(SCTP_M_AUTH_HL, "sctp_athm", "sctp auth hmac list");
67 MALLOC_DEFINE(SCTP_M_AUTH_IF, "sctp_athi", "sctp auth info");
68 MALLOC_DEFINE(SCTP_M_STRESET, "sctp_stre", "sctp stream reset");
69 MALLOC_DEFINE(SCTP_M_CMSG, "sctp_cmsg", "sctp CMSG buffer");
70 MALLOC_DEFINE(SCTP_M_COPYAL, "sctp_cpal", "sctp copy all");
71 MALLOC_DEFINE(SCTP_M_VRF, "sctp_vrf", "sctp vrf struct");
72 MALLOC_DEFINE(SCTP_M_IFA, "sctp_ifa", "sctp ifa struct");
73 MALLOC_DEFINE(SCTP_M_IFN, "sctp_ifn", "sctp ifn struct");
74 MALLOC_DEFINE(SCTP_M_TIMW, "sctp_timw", "sctp time block");
75 MALLOC_DEFINE(SCTP_M_MVRF, "sctp_mvrf", "sctp mvrf pcb list");
76 MALLOC_DEFINE(SCTP_M_ITER, "sctp_iter", "sctp iterator control");
77 MALLOC_DEFINE(SCTP_M_SOCKOPT, "sctp_socko", "sctp socket option");
78 MALLOC_DEFINE(SCTP_M_MCORE, "sctp_mcore", "sctp mcore queue");
79 #endif
80
81 /* Global NON-VNET structure that controls the iterator */
82 struct iterator_control sctp_it_ctl;
83
84 #if !defined(__FreeBSD__)
85 static void
sctp_cleanup_itqueue(void)86 sctp_cleanup_itqueue(void)
87 {
88 struct sctp_iterator *it, *nit;
89
90 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
91 if (it->function_atend != NULL) {
92 (*it->function_atend) (it->pointer, it->val);
93 }
94 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
95 SCTP_FREE(it, SCTP_M_ITER);
96 }
97 }
98 #endif
99 #if defined(__Userspace__)
100 /*__Userspace__ TODO if we use thread based iterator
101 * then the implementation of wakeup will need to change.
102 * Currently we are using timeo_cond for ident so_timeo
103 * but that is not sufficient if we need to use another ident
104 * like wakeup(&sctppcbinfo.iterator_running);
105 */
106 #endif
107
108 void
sctp_wakeup_iterator(void)109 sctp_wakeup_iterator(void)
110 {
111 #if defined(SCTP_PROCESS_LEVEL_LOCKS)
112 #if defined(__Userspace_os_Windows)
113 WakeAllConditionVariable(&sctp_it_ctl.iterator_wakeup);
114 #else
115 pthread_cond_broadcast(&sctp_it_ctl.iterator_wakeup);
116 #endif
117 #else
118 wakeup(&sctp_it_ctl.iterator_running);
119 #endif
120 }
121
122 #if defined(__Userspace__)
123 static void *
124 #else
125 static void
126 #endif
sctp_iterator_thread(void * v SCTP_UNUSED)127 sctp_iterator_thread(void *v SCTP_UNUSED)
128 {
129 #if defined(__Userspace__)
130 sctp_userspace_set_threadname("SCTP iterator");
131 #endif
132 SCTP_IPI_ITERATOR_WQ_LOCK();
133 /* In FreeBSD this thread never terminates. */
134 #if defined(__FreeBSD__)
135 for (;;) {
136 #else
137 while ((sctp_it_ctl.iterator_flags & SCTP_ITERATOR_MUST_EXIT) == 0) {
138 #endif
139 #if !defined(__Userspace__)
140 msleep(&sctp_it_ctl.iterator_running,
141 #if defined(__FreeBSD__)
142 &sctp_it_ctl.ipi_iterator_wq_mtx,
143 #elif defined(__APPLE__) || defined(__Userspace_os_Darwin)
144 sctp_it_ctl.ipi_iterator_wq_mtx,
145 #endif
146 0, "waiting_for_work", 0);
147 #else
148 #if defined(__Userspace_os_Windows)
149 SleepConditionVariableCS(&sctp_it_ctl.iterator_wakeup, &sctp_it_ctl.ipi_iterator_wq_mtx, INFINITE);
150 #else
151 pthread_cond_wait(&sctp_it_ctl.iterator_wakeup, &sctp_it_ctl.ipi_iterator_wq_mtx);
152 #endif
153 #endif
154 #if !defined(__FreeBSD__)
155 if (sctp_it_ctl.iterator_flags & SCTP_ITERATOR_MUST_EXIT) {
156 break;
157 }
158 #endif
159 sctp_iterator_worker();
160 }
161 #if !defined(__FreeBSD__)
162 /* Now this thread needs to be terminated */
163 sctp_cleanup_itqueue();
164 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_EXITED;
165 SCTP_IPI_ITERATOR_WQ_UNLOCK();
166 #if defined(__Userspace__)
167 sctp_wakeup_iterator();
168 return (NULL);
169 #else
170 wakeup(&sctp_it_ctl.iterator_flags);
171 thread_terminate(current_thread());
172 #ifdef INVARIANTS
173 panic("Hmm. thread_terminate() continues...");
174 #endif
175 #endif
176 #endif
177 }
178
179 void
180 sctp_startup_iterator(void)
181 {
182 if (sctp_it_ctl.thread_proc) {
183 /* You only get one */
184 return;
185 }
186 /* Initialize global locks here, thus only once. */
187 SCTP_ITERATOR_LOCK_INIT();
188 SCTP_IPI_ITERATOR_WQ_INIT();
189 TAILQ_INIT(&sctp_it_ctl.iteratorhead);
190 #if defined(__FreeBSD__)
191 #if __FreeBSD_version <= 701000
192 kthread_create(sctp_iterator_thread,
193 #else
194 kproc_create(sctp_iterator_thread,
195 #endif
196 (void *)NULL,
197 &sctp_it_ctl.thread_proc,
198 RFPROC,
199 SCTP_KTHREAD_PAGES,
200 SCTP_KTRHEAD_NAME);
201 #elif defined(__APPLE__)
202 kernel_thread_start((thread_continue_t)sctp_iterator_thread, NULL, &sctp_it_ctl.thread_proc);
203 #elif defined(__Userspace__)
204 if (sctp_userspace_thread_create(&sctp_it_ctl.thread_proc, &sctp_iterator_thread)) {
205 SCTP_PRINTF("ERROR: Creating sctp_iterator_thread failed.\n");
206 } else {
207 SCTP_BASE_VAR(iterator_thread_started) = 1;
208 }
209 #endif
210 }
211
212 #ifdef INET6
213
214 #if defined(__Userspace__)
215 /* __Userspace__ TODO. struct in6_ifaddr is defined in sys/netinet6/in6_var.h
216 ip6_use_deprecated is defined as int ip6_use_deprecated = 1; in /src/sys/netinet6/in6_proto.c
217 */
218 void
219 sctp_gather_internal_ifa_flags(struct sctp_ifa *ifa)
220 {
221 return; /* stub */
222 }
223 #else
224 void
225 sctp_gather_internal_ifa_flags(struct sctp_ifa *ifa)
226 {
227 struct in6_ifaddr *ifa6;
228
229 ifa6 = (struct in6_ifaddr *)ifa->ifa;
230 ifa->flags = ifa6->ia6_flags;
231 if (!MODULE_GLOBAL(ip6_use_deprecated)) {
232 if (ifa->flags &
233 IN6_IFF_DEPRECATED) {
234 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
235 } else {
236 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
237 }
238 } else {
239 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
240 }
241 if (ifa->flags &
242 (IN6_IFF_DETACHED |
243 IN6_IFF_ANYCAST |
244 IN6_IFF_NOTREADY)) {
245 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
246 } else {
247 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
248 }
249 }
250 #endif /* __Userspace__ */
251 #endif /* INET6 */
252
253
254 #if !defined(__Userspace__)
255 static uint32_t
256 sctp_is_desired_interface_type(struct ifnet *ifn)
257 {
258 int result;
259
260 /* check the interface type to see if it's one we care about */
261 #if defined(__APPLE__)
262 switch(ifnet_type(ifn)) {
263 #else
264 switch (ifn->if_type) {
265 #endif
266 case IFT_ETHER:
267 case IFT_ISO88023:
268 case IFT_ISO88024:
269 case IFT_ISO88025:
270 case IFT_ISO88026:
271 case IFT_STARLAN:
272 case IFT_P10:
273 case IFT_P80:
274 case IFT_HY:
275 case IFT_FDDI:
276 case IFT_XETHER:
277 case IFT_ISDNBASIC:
278 case IFT_ISDNPRIMARY:
279 case IFT_PTPSERIAL:
280 case IFT_OTHER:
281 case IFT_PPP:
282 case IFT_LOOP:
283 case IFT_SLIP:
284 case IFT_GIF:
285 case IFT_L2VLAN:
286 case IFT_STF:
287 #if !defined(__APPLE__)
288 case IFT_IP:
289 case IFT_IPOVERCDLC:
290 case IFT_IPOVERCLAW:
291 case IFT_PROPVIRTUAL: /* NetGraph Virtual too */
292 case IFT_VIRTUALIPADDRESS:
293 #endif
294 result = 1;
295 break;
296 default:
297 result = 0;
298 }
299
300 return (result);
301 }
302 #endif
303
304 #if defined(__APPLE__)
305 int
306 sctp_is_vmware_interface(struct ifnet *ifn)
307 {
308 return (strncmp(ifnet_name(ifn), "vmnet", 5) == 0);
309 }
310 #endif
311
312 #if defined(__Userspace_os_Windows)
313 #ifdef MALLOC
314 #undef MALLOC
315 #define MALLOC(x) HeapAlloc(GetProcessHeap(), 0, (x))
316 #endif
317 #ifdef FREE
318 #undef FREE
319 #define FREE(x) HeapFree(GetProcessHeap(), 0, (x))
320 #endif
321 static void
322 sctp_init_ifns_for_vrf(int vrfid)
323 {
324 #if defined(INET) || defined(INET6)
325 struct sctp_ifa *sctp_ifa;
326 DWORD Err, AdapterAddrsSize;
327 PIP_ADAPTER_ADDRESSES pAdapterAddrs, pAdapt;
328 PIP_ADAPTER_UNICAST_ADDRESS pUnicast;
329 #endif
330
331 #ifdef INET
332 AdapterAddrsSize = 0;
333
334 if ((Err = GetAdaptersAddresses(AF_INET, 0, NULL, NULL, &AdapterAddrsSize)) != 0) {
335 if ((Err != ERROR_BUFFER_OVERFLOW) && (Err != ERROR_INSUFFICIENT_BUFFER)) {
336 SCTP_PRINTF("GetAdaptersV4Addresses() sizing failed with error code %d\n", Err);
337 SCTP_PRINTF("err = %d; AdapterAddrsSize = %d\n", Err, AdapterAddrsSize);
338 return;
339 }
340 }
341
342 /* Allocate memory from sizing information */
343 if ((pAdapterAddrs = (PIP_ADAPTER_ADDRESSES) GlobalAlloc(GPTR, AdapterAddrsSize)) == NULL) {
344 SCTP_PRINTF("Memory allocation error!\n");
345 return;
346 }
347 /* Get actual adapter information */
348 if ((Err = GetAdaptersAddresses(AF_INET, 0, NULL, pAdapterAddrs, &AdapterAddrsSize)) != ERROR_SUCCESS) {
349 SCTP_PRINTF("GetAdaptersV4Addresses() failed with error code %d\n", Err);
350 FREE(pAdapterAddrs);
351 return;
352 }
353 /* Enumerate through each returned adapter and save its information */
354 for (pAdapt = pAdapterAddrs; pAdapt; pAdapt = pAdapt->Next) {
355 if (pAdapt->IfType == IF_TYPE_IEEE80211 || pAdapt->IfType == IF_TYPE_ETHERNET_CSMACD) {
356 for (pUnicast = pAdapt->FirstUnicastAddress; pUnicast; pUnicast = pUnicast->Next) {
357 if (IN4_ISLINKLOCAL_ADDRESS(&(((struct sockaddr_in *)(pUnicast->Address.lpSockaddr))->sin_addr))) {
358 continue;
359 }
360 sctp_ifa = sctp_add_addr_to_vrf(0,
361 NULL,
362 pAdapt->IfIndex,
363 (pAdapt->IfType == IF_TYPE_IEEE80211)?MIB_IF_TYPE_ETHERNET:pAdapt->IfType,
364 pAdapt->AdapterName,
365 NULL,
366 pUnicast->Address.lpSockaddr,
367 pAdapt->Flags,
368 0);
369 if (sctp_ifa) {
370 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
371 }
372 }
373 }
374 }
375 FREE(pAdapterAddrs);
376 #endif
377 #ifdef INET6
378 AdapterAddrsSize = 0;
379
380 if ((Err = GetAdaptersAddresses(AF_INET6, 0, NULL, NULL, &AdapterAddrsSize)) != 0) {
381 if ((Err != ERROR_BUFFER_OVERFLOW) && (Err != ERROR_INSUFFICIENT_BUFFER)) {
382 SCTP_PRINTF("GetAdaptersV6Addresses() sizing failed with error code %d\n", Err);
383 SCTP_PRINTF("err = %d; AdapterAddrsSize = %d\n", Err, AdapterAddrsSize);
384 return;
385 }
386 }
387 /* Allocate memory from sizing information */
388 if ((pAdapterAddrs = (PIP_ADAPTER_ADDRESSES) GlobalAlloc(GPTR, AdapterAddrsSize)) == NULL) {
389 SCTP_PRINTF("Memory allocation error!\n");
390 return;
391 }
392 /* Get actual adapter information */
393 if ((Err = GetAdaptersAddresses(AF_INET6, 0, NULL, pAdapterAddrs, &AdapterAddrsSize)) != ERROR_SUCCESS) {
394 SCTP_PRINTF("GetAdaptersV6Addresses() failed with error code %d\n", Err);
395 FREE(pAdapterAddrs);
396 return;
397 }
398 /* Enumerate through each returned adapter and save its information */
399 for (pAdapt = pAdapterAddrs; pAdapt; pAdapt = pAdapt->Next) {
400 if (pAdapt->IfType == IF_TYPE_IEEE80211 || pAdapt->IfType == IF_TYPE_ETHERNET_CSMACD) {
401 for (pUnicast = pAdapt->FirstUnicastAddress; pUnicast; pUnicast = pUnicast->Next) {
402 sctp_ifa = sctp_add_addr_to_vrf(0,
403 NULL,
404 pAdapt->Ipv6IfIndex,
405 (pAdapt->IfType == IF_TYPE_IEEE80211)?MIB_IF_TYPE_ETHERNET:pAdapt->IfType,
406 pAdapt->AdapterName,
407 NULL,
408 pUnicast->Address.lpSockaddr,
409 pAdapt->Flags,
410 0);
411 if (sctp_ifa) {
412 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
413 }
414 }
415 }
416 }
417 FREE(pAdapterAddrs);
418 #endif
419 }
420 #elif defined(__Userspace__)
421 static void
422 sctp_init_ifns_for_vrf(int vrfid)
423 {
424 #if defined(INET) || defined(INET6)
425 int rc;
426 struct ifaddrs *ifa, *ifas;
427 struct sctp_ifa *sctp_ifa;
428 uint32_t ifa_flags;
429
430 rc = getifaddrs(&ifas);
431 if (rc != 0) {
432 return;
433 }
434 for (ifa = ifas; ifa; ifa = ifa->ifa_next) {
435 if (ifa->ifa_addr == NULL) {
436 continue;
437 }
438 #if !defined(INET)
439 if (ifa->ifa_addr->sa_family != AF_INET6) {
440 /* non inet6 skip */
441 continue;
442 }
443 #elif !defined(INET6)
444 if (ifa->ifa_addr->sa_family != AF_INET) {
445 /* non inet skip */
446 continue;
447 }
448 #else
449 if ((ifa->ifa_addr->sa_family != AF_INET) && (ifa->ifa_addr->sa_family != AF_INET6)) {
450 /* non inet/inet6 skip */
451 continue;
452 }
453 #endif
454 #if defined(INET6)
455 if ((ifa->ifa_addr->sa_family == AF_INET6) &&
456 IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
457 /* skip unspecifed addresses */
458 continue;
459 }
460 #endif
461 #if defined(INET)
462 if (ifa->ifa_addr->sa_family == AF_INET &&
463 ((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
464 continue;
465 }
466 #endif
467 ifa_flags = 0;
468 sctp_ifa = sctp_add_addr_to_vrf(vrfid,
469 NULL,
470 if_nametoindex(ifa->ifa_name),
471 0,
472 ifa->ifa_name,
473 NULL,
474 ifa->ifa_addr,
475 ifa_flags,
476 0);
477 if (sctp_ifa) {
478 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
479 }
480 }
481 freeifaddrs(ifas);
482 #endif
483 }
484 #endif
485
486 #if defined(__APPLE__)
487 static void
488 sctp_init_ifns_for_vrf(int vrfid)
489 {
490 /* Here we must apply ANY locks needed by the
491 * IFN we access and also make sure we lock
492 * any IFA that exists as we float through the
493 * list of IFA's
494 */
495 struct ifnet **ifnetlist;
496 uint32_t i, j, count;
497 char name[SCTP_IFNAMSIZ];
498 struct ifnet *ifn;
499 struct ifaddr **ifaddrlist;
500 struct ifaddr *ifa;
501 struct in6_ifaddr *ifa6;
502 struct sctp_ifa *sctp_ifa;
503 uint32_t ifa_flags;
504
505 if (ifnet_list_get(IFNET_FAMILY_ANY, &ifnetlist, &count) != 0) {
506 return;
507 }
508 for (i = 0; i < count; i++) {
509 ifn = ifnetlist[i];
510 if (SCTP_BASE_SYSCTL(sctp_ignore_vmware_interfaces) && sctp_is_vmware_interface(ifn)) {
511 continue;
512 }
513 if (sctp_is_desired_interface_type(ifn) == 0) {
514 /* non desired type */
515 continue;
516 }
517 if (ifnet_get_address_list(ifn, &ifaddrlist) != 0) {
518 continue;
519 }
520 for (j = 0; ifaddrlist[j] != NULL; j++) {
521 ifa = ifaddrlist[j];
522 if (ifa->ifa_addr == NULL) {
523 continue;
524 }
525 if ((ifa->ifa_addr->sa_family != AF_INET) && (ifa->ifa_addr->sa_family != AF_INET6)) {
526 /* non inet/inet6 skip */
527 continue;
528 }
529 if (ifa->ifa_addr->sa_family == AF_INET6) {
530 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
531 /* skip unspecifed addresses */
532 continue;
533 }
534 } else {
535 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == INADDR_ANY) {
536 continue;
537 }
538 }
539 if (ifa->ifa_addr->sa_family == AF_INET6) {
540 ifa6 = (struct in6_ifaddr *)ifa;
541 ifa_flags = ifa6->ia6_flags;
542 } else {
543 ifa_flags = 0;
544 }
545 SCTP_SNPRINTF(name, SCTP_IFNAMSIZ, "%s%d", ifnet_name(ifn), ifnet_unit(ifn));
546 sctp_ifa = sctp_add_addr_to_vrf(vrfid,
547 (void *)ifn, /* XXX */
548 ifnet_index(ifn),
549 ifnet_type(ifn),
550 name,
551 (void *)ifa, /* XXX */
552 ifa->ifa_addr,
553 ifa_flags,
554 0);
555 if (sctp_ifa) {
556 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
557 }
558 }
559 ifnet_free_address_list(ifaddrlist);
560 }
561 ifnet_list_free(ifnetlist);
562 }
563 #endif
564
565 #if defined(__FreeBSD__)
566 static void
567 sctp_init_ifns_for_vrf(int vrfid)
568 {
569 /* Here we must apply ANY locks needed by the
570 * IFN we access and also make sure we lock
571 * any IFA that exists as we float through the
572 * list of IFA's
573 */
574 struct epoch_tracker et;
575 struct ifnet *ifn;
576 struct ifaddr *ifa;
577 struct sctp_ifa *sctp_ifa;
578 uint32_t ifa_flags;
579 #ifdef INET6
580 struct in6_ifaddr *ifa6;
581 #endif
582
583 IFNET_RLOCK();
584 NET_EPOCH_ENTER(et);
585 CK_STAILQ_FOREACH(ifn, &MODULE_GLOBAL(ifnet), if_link) {
586 if (sctp_is_desired_interface_type(ifn) == 0) {
587 /* non desired type */
588 continue;
589 }
590 CK_STAILQ_FOREACH(ifa, &ifn->if_addrhead, ifa_link) {
591 if (ifa->ifa_addr == NULL) {
592 continue;
593 }
594 switch (ifa->ifa_addr->sa_family) {
595 #ifdef INET
596 case AF_INET:
597 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
598 continue;
599 }
600 break;
601 #endif
602 #ifdef INET6
603 case AF_INET6:
604 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
605 /* skip unspecifed addresses */
606 continue;
607 }
608 break;
609 #endif
610 default:
611 continue;
612 }
613 switch (ifa->ifa_addr->sa_family) {
614 #ifdef INET
615 case AF_INET:
616 ifa_flags = 0;
617 break;
618 #endif
619 #ifdef INET6
620 case AF_INET6:
621 ifa6 = (struct in6_ifaddr *)ifa;
622 ifa_flags = ifa6->ia6_flags;
623 break;
624 #endif
625 default:
626 ifa_flags = 0;
627 break;
628 }
629 sctp_ifa = sctp_add_addr_to_vrf(vrfid,
630 (void *)ifn,
631 ifn->if_index,
632 ifn->if_type,
633 ifn->if_xname,
634 (void *)ifa,
635 ifa->ifa_addr,
636 ifa_flags,
637 0);
638 if (sctp_ifa) {
639 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
640 }
641 }
642 }
643 NET_EPOCH_EXIT(et);
644 IFNET_RUNLOCK();
645 }
646 #endif
647
648 void
649 sctp_init_vrf_list(int vrfid)
650 {
651 if (vrfid > SCTP_MAX_VRF_ID)
652 /* can't do that */
653 return;
654
655 /* Don't care about return here */
656 (void)sctp_allocate_vrf(vrfid);
657
658 /* Now we need to build all the ifn's
659 * for this vrf and there addresses
660 */
661 sctp_init_ifns_for_vrf(vrfid);
662 }
663
664 void
665 sctp_addr_change(struct ifaddr *ifa, int cmd)
666 {
667 #if defined(__Userspace__)
668 return;
669 #else
670 uint32_t ifa_flags = 0;
671
672 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
673 return;
674 }
675 /* BSD only has one VRF, if this changes
676 * we will need to hook in the right
677 * things here to get the id to pass to
678 * the address management routine.
679 */
680 if (SCTP_BASE_VAR(first_time) == 0) {
681 /* Special test to see if my ::1 will showup with this */
682 SCTP_BASE_VAR(first_time) = 1;
683 sctp_init_ifns_for_vrf(SCTP_DEFAULT_VRFID);
684 }
685
686 if ((cmd != RTM_ADD) && (cmd != RTM_DELETE)) {
687 /* don't know what to do with this */
688 return;
689 }
690
691 if (ifa->ifa_addr == NULL) {
692 return;
693 }
694 if (sctp_is_desired_interface_type(ifa->ifa_ifp) == 0) {
695 /* non desired type */
696 return;
697 }
698 switch (ifa->ifa_addr->sa_family) {
699 #ifdef INET
700 case AF_INET:
701 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
702 return;
703 }
704 break;
705 #endif
706 #ifdef INET6
707 case AF_INET6:
708 ifa_flags = ((struct in6_ifaddr *)ifa)->ia6_flags;
709 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
710 /* skip unspecifed addresses */
711 return;
712 }
713 break;
714 #endif
715 default:
716 /* non inet/inet6 skip */
717 return;
718 }
719 if (cmd == RTM_ADD) {
720 (void)sctp_add_addr_to_vrf(SCTP_DEFAULT_VRFID, (void *)ifa->ifa_ifp,
721 #if defined(__APPLE__)
722 ifnet_index(ifa->ifa_ifp), ifnet_type(ifa->ifa_ifp), ifnet_name(ifa->ifa_ifp),
723 #else
724 ifa->ifa_ifp->if_index, ifa->ifa_ifp->if_type, ifa->ifa_ifp->if_xname,
725 #endif
726 (void *)ifa, ifa->ifa_addr, ifa_flags, 1);
727 } else {
728
729 sctp_del_addr_from_vrf(SCTP_DEFAULT_VRFID, ifa->ifa_addr,
730 #if defined(__APPLE__)
731 ifnet_index(ifa->ifa_ifp),
732 ifnet_name(ifa->ifa_ifp));
733 #else
734 ifa->ifa_ifp->if_index,
735 ifa->ifa_ifp->if_xname);
736 #endif
737
738 /* We don't bump refcount here so when it completes
739 * the final delete will happen.
740 */
741 }
742 #endif
743 }
744
745 #if defined(__FreeBSD__)
746 void
747 sctp_addr_change_event_handler(void *arg __unused, struct ifaddr *ifa, int cmd) {
748 sctp_addr_change(ifa, cmd);
749 }
750 #endif
751 #if defined(__APPLE__)
752 void
753 sctp_add_or_del_interfaces(int (*pred)(struct ifnet *), int add)
754 {
755 struct ifnet **ifnetlist;
756 struct ifaddr **ifaddrlist;
757 uint32_t i, j, count;
758
759 if (ifnet_list_get(IFNET_FAMILY_ANY, &ifnetlist, &count) != 0) {
760 return;
761 }
762 for (i = 0; i < count; i++) {
763 if (!(*pred)(ifnetlist[i])) {
764 continue;
765 }
766 if (ifnet_get_address_list(ifnetlist[i], &ifaddrlist) != 0) {
767 continue;
768 }
769 for (j = 0; ifaddrlist[j] != NULL; j++) {
770 sctp_addr_change(ifaddrlist[j], add ? RTM_ADD : RTM_DELETE);
771 }
772 ifnet_free_address_list(ifaddrlist);
773 }
774 ifnet_list_free(ifnetlist);
775 return;
776 }
777 #endif
778
779 struct mbuf *
780 sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header,
781 int how, int allonebuf, int type)
782 {
783 struct mbuf *m = NULL;
784 #if defined(__FreeBSD__) && __FreeBSD_version > 1100052 || defined(__Userspace__)
785 #if defined(__Userspace__)
786 m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0, allonebuf);
787 #else
788 m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0);
789 #endif
790 if (m == NULL) {
791 /* bad, no memory */
792 return (m);
793 }
794 #if !defined(__Userspace__)
795 if (allonebuf) {
796 if (SCTP_BUF_SIZE(m) < space_needed) {
797 m_freem(m);
798 return (NULL);
799 }
800 KASSERT(SCTP_BUF_NEXT(m) == NULL, ("%s: no chain allowed", __FUNCTION__));
801 }
802 #endif
803 #ifdef SCTP_MBUF_LOGGING
804 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
805 sctp_log_mb(m, SCTP_MBUF_IALLOC);
806 }
807 #endif
808 #else
809 int mbuf_threshold;
810 unsigned int size;
811
812 if (want_header) {
813 MGETHDR(m, how, type);
814 size = MHLEN;
815 } else {
816 MGET(m, how, type);
817 size = MLEN;
818 }
819 if (m == NULL) {
820 return (NULL);
821 }
822 if (allonebuf == 0) {
823 mbuf_threshold = SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count);
824 } else {
825 mbuf_threshold = 1;
826 }
827
828 if (space_needed > (unsigned int)(((mbuf_threshold - 1) * MLEN) + MHLEN)) {
829 MCLGET(m, how);
830 if (m == NULL) {
831 return (NULL);
832 }
833 if (SCTP_BUF_IS_EXTENDED(m) == 0) {
834 sctp_m_freem(m);
835 return (NULL);
836 }
837 size = SCTP_BUF_EXTEND_SIZE(m);
838 }
839 if (allonebuf != 0 && size < space_needed) {
840 m_freem(m);
841 return (NULL);
842 }
843 SCTP_BUF_LEN(m) = 0;
844 SCTP_BUF_NEXT(m) = SCTP_BUF_NEXT_PKT(m) = NULL;
845 #ifdef SCTP_MBUF_LOGGING
846 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
847 sctp_log_mb(m, SCTP_MBUF_IALLOC);
848 }
849 #endif
850 #endif
851 return (m);
852 }
853
854
855 #ifdef SCTP_PACKET_LOGGING
856 void
857 sctp_packet_log(struct mbuf *m)
858 {
859 int *lenat, thisone;
860 void *copyto;
861 uint32_t *tick_tock;
862 int length;
863 int total_len;
864 int grabbed_lock = 0;
865 int value, newval, thisend, thisbegin;
866 /*
867 * Buffer layout.
868 * -sizeof this entry (total_len)
869 * -previous end (value)
870 * -ticks of log (ticks)
871 * o -ip packet
872 * o -as logged
873 * - where this started (thisbegin)
874 * x <--end points here
875 */
876 length = SCTP_HEADER_LEN(m);
877 total_len = SCTP_SIZE32((length + (4 * sizeof(int))));
878 /* Log a packet to the buffer. */
879 if (total_len> SCTP_PACKET_LOG_SIZE) {
880 /* Can't log this packet I have not a buffer big enough */
881 return;
882 }
883 if (length < (int)(SCTP_MIN_V4_OVERHEAD + sizeof(struct sctp_cookie_ack_chunk))) {
884 return;
885 }
886 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), 1);
887 try_again:
888 if (SCTP_BASE_VAR(packet_log_writers) > SCTP_PKTLOG_WRITERS_NEED_LOCK) {
889 SCTP_IP_PKTLOG_LOCK();
890 grabbed_lock = 1;
891 again_locked:
892 value = SCTP_BASE_VAR(packet_log_end);
893 newval = SCTP_BASE_VAR(packet_log_end) + total_len;
894 if (newval >= SCTP_PACKET_LOG_SIZE) {
895 /* we wrapped */
896 thisbegin = 0;
897 thisend = total_len;
898 } else {
899 thisbegin = SCTP_BASE_VAR(packet_log_end);
900 thisend = newval;
901 }
902 if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) {
903 goto again_locked;
904 }
905 } else {
906 value = SCTP_BASE_VAR(packet_log_end);
907 newval = SCTP_BASE_VAR(packet_log_end) + total_len;
908 if (newval >= SCTP_PACKET_LOG_SIZE) {
909 /* we wrapped */
910 thisbegin = 0;
911 thisend = total_len;
912 } else {
913 thisbegin = SCTP_BASE_VAR(packet_log_end);
914 thisend = newval;
915 }
916 if (!(atomic_cmpset_int(&SCTP_BASE_VAR(packet_log_end), value, thisend))) {
917 goto try_again;
918 }
919 }
920 /* Sanity check */
921 if (thisend >= SCTP_PACKET_LOG_SIZE) {
922 SCTP_PRINTF("Insanity stops a log thisbegin:%d thisend:%d writers:%d lock:%d end:%d\n",
923 thisbegin,
924 thisend,
925 SCTP_BASE_VAR(packet_log_writers),
926 grabbed_lock,
927 SCTP_BASE_VAR(packet_log_end));
928 SCTP_BASE_VAR(packet_log_end) = 0;
929 goto no_log;
930
931 }
932 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisbegin];
933 *lenat = total_len;
934 lenat++;
935 *lenat = value;
936 lenat++;
937 tick_tock = (uint32_t *)lenat;
938 lenat++;
939 *tick_tock = sctp_get_tick_count();
940 copyto = (void *)lenat;
941 thisone = thisend - sizeof(int);
942 lenat = (int *)&SCTP_BASE_VAR(packet_log_buffer)[thisone];
943 *lenat = thisbegin;
944 if (grabbed_lock) {
945 SCTP_IP_PKTLOG_UNLOCK();
946 grabbed_lock = 0;
947 }
948 m_copydata(m, 0, length, (caddr_t)copyto);
949 no_log:
950 if (grabbed_lock) {
951 SCTP_IP_PKTLOG_UNLOCK();
952 }
953 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers), 1);
954 }
955
956
957 int
958 sctp_copy_out_packet_log(uint8_t *target, int length)
959 {
960 /* We wind through the packet log starting at
961 * start copying up to length bytes out.
962 * We return the number of bytes copied.
963 */
964 int tocopy, this_copy;
965 int *lenat;
966 int did_delay = 0;
967
968 tocopy = length;
969 if (length < (int)(2 * sizeof(int))) {
970 /* not enough room */
971 return (0);
972 }
973 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
974 atomic_add_int(&SCTP_BASE_VAR(packet_log_writers), SCTP_PKTLOG_WRITERS_NEED_LOCK);
975 again:
976 if ((did_delay == 0) && (SCTP_BASE_VAR(packet_log_writers) != SCTP_PKTLOG_WRITERS_NEED_LOCK)) {
977 /* we delay here for just a moment hoping the writer(s) that were
978 * present when we entered will have left and we only have
979 * locking ones that will contend with us for the lock. This
980 * does not assure 100% access, but its good enough for
981 * a logging facility like this.
982 */
983 did_delay = 1;
984 DELAY(10);
985 goto again;
986 }
987 }
988 SCTP_IP_PKTLOG_LOCK();
989 lenat = (int *)target;
990 *lenat = SCTP_BASE_VAR(packet_log_end);
991 lenat++;
992 this_copy = min((length - sizeof(int)), SCTP_PACKET_LOG_SIZE);
993 memcpy((void *)lenat, (void *)SCTP_BASE_VAR(packet_log_buffer), this_copy);
994 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
995 atomic_subtract_int(&SCTP_BASE_VAR(packet_log_writers),
996 SCTP_PKTLOG_WRITERS_NEED_LOCK);
997 }
998 SCTP_IP_PKTLOG_UNLOCK();
999 return (this_copy + sizeof(int));
1000 }
1001
1002 #endif
1003