1/*-
2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * a) Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 *
10 * b) Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the distribution.
13 *
14 * c) Neither the name of Cisco Systems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28 * THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31/* $KAME: sctp_output.c,v 1.46 2005/03/06 16:04:17 itojun Exp $ */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/sys/netinet/sctp_bsd_addr.c 175751 2008-01-28 10:33:41Z rrs $");
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
52/* Declare all of our malloc named types */
53
54/* Note to Michael/Peter for mac-os,
55 * I think mac has this too since I
56 * do see the M_PCB type, so I
57 * will also put in the mac file the
58 * MALLOC_DECLARE. If this does not
59 * work for mac uncomment the defines for
60 * the strings that we use in Panda, I put
61 * them in comments in the mac-os file.
62 */
63MALLOC_DEFINE(SCTP_M_MAP, "sctp_map", "sctp asoc map descriptor");
64MALLOC_DEFINE(SCTP_M_STRMI, "sctp_stri", "sctp stream in array");
65MALLOC_DEFINE(SCTP_M_STRMO, "sctp_stro", "sctp stream out array");
66MALLOC_DEFINE(SCTP_M_ASC_ADDR, "sctp_aadr", "sctp asconf address");
67MALLOC_DEFINE(SCTP_M_ASC_IT, "sctp_a_it", "sctp asconf iterator");
68MALLOC_DEFINE(SCTP_M_AUTH_CL, "sctp_atcl", "sctp auth chunklist");
69MALLOC_DEFINE(SCTP_M_AUTH_KY, "sctp_atky", "sctp auth key");
70MALLOC_DEFINE(SCTP_M_AUTH_HL, "sctp_athm", "sctp auth hmac list");
71MALLOC_DEFINE(SCTP_M_AUTH_IF, "sctp_athi", "sctp auth info");
72MALLOC_DEFINE(SCTP_M_STRESET, "sctp_stre", "sctp stream reset");
73MALLOC_DEFINE(SCTP_M_CMSG, "sctp_cmsg", "sctp CMSG buffer");
74MALLOC_DEFINE(SCTP_M_COPYAL, "sctp_cpal", "sctp copy all");
75MALLOC_DEFINE(SCTP_M_VRF, "sctp_vrf", "sctp vrf struct");
76MALLOC_DEFINE(SCTP_M_IFA, "sctp_ifa", "sctp ifa struct");
77MALLOC_DEFINE(SCTP_M_IFN, "sctp_ifn", "sctp ifn struct");
78MALLOC_DEFINE(SCTP_M_TIMW, "sctp_timw", "sctp time block");
79MALLOC_DEFINE(SCTP_M_MVRF, "sctp_mvrf", "sctp mvrf pcb list");
80MALLOC_DEFINE(SCTP_M_ITER, "sctp_iter", "sctp iterator control");
81MALLOC_DEFINE(SCTP_M_SOCKOPT, "sctp_socko", "sctp socket option");
82
83
84#if defined(SCTP_USE_THREAD_BASED_ITERATOR)
85void
86sctp_wakeup_iterator(void)
87{
88 wakeup(&sctppcbinfo.iterator_running);
89}
90
91static void
92sctp_iterator_thread(void *v)
93{
94 SCTP_IPI_ITERATOR_WQ_LOCK();
95 sctppcbinfo.iterator_running = 0;
96 while (1) {
97 msleep(&sctppcbinfo.iterator_running,
98 &sctppcbinfo.ipi_iterator_wq_mtx,
99 0, "waiting_for_work", 0);
100 sctp_iterator_worker();
101 }
102}
103
104void
105sctp_startup_iterator(void)
106{
107 int ret;
108
109 ret = kproc_create(sctp_iterator_thread,
110 (void *)NULL,
111 &sctppcbinfo.thread_proc,
112 RFPROC,
113 SCTP_KTHREAD_PAGES,
114 SCTP_KTRHEAD_NAME);
115}
116
117#endif
118
119
120void
121sctp_gather_internal_ifa_flags(struct sctp_ifa *ifa)
122{
123 struct in6_ifaddr *ifa6;
124
125 ifa6 = (struct in6_ifaddr *)ifa->ifa;
126 ifa->flags = ifa6->ia6_flags;
127 if (!ip6_use_deprecated) {
128 if (ifa->flags &
129 IN6_IFF_DEPRECATED) {
130 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
131 } else {
132 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
133 }
134 } else {
135 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
136 }
137 if (ifa->flags &
138 (IN6_IFF_DETACHED |
139 IN6_IFF_ANYCAST |
140 IN6_IFF_NOTREADY)) {
141 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
142 } else {
143 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
144 }
145}
146
147
148
149static uint32_t
150sctp_is_desired_interface_type(struct ifaddr *ifa)
151{
152 int result;
153
154 /* check the interface type to see if it's one we care about */
155 switch (ifa->ifa_ifp->if_type) {
156 case IFT_ETHER:
157 case IFT_ISO88023:
158 case IFT_ISO88024:
159 case IFT_ISO88025:
160 case IFT_ISO88026:
161 case IFT_STARLAN:
162 case IFT_P10:
163 case IFT_P80:
164 case IFT_HY:
165 case IFT_FDDI:
166 case IFT_XETHER:
167 case IFT_ISDNBASIC:
168 case IFT_ISDNPRIMARY:
169 case IFT_PTPSERIAL:
170 case IFT_OTHER:
171 case IFT_PPP:
172 case IFT_LOOP:
173 case IFT_SLIP:
174 case IFT_IP:
175 case IFT_IPOVERCDLC:
176 case IFT_IPOVERCLAW:
177 case IFT_VIRTUALIPADDRESS:
178 result = 1;
179 break;
180 default:
181 result = 0;
182 }
183
184 return (result);
185}
186
187static void
188sctp_init_ifns_for_vrf(int vrfid)
189{
190 /*
191 * Here we must apply ANY locks needed by the IFN we access and also
192 * make sure we lock any IFA that exists as we float through the
193 * list of IFA's
194 */
195 struct ifnet *ifn;
196 struct ifaddr *ifa;
197 struct in6_ifaddr *ifa6;
198 struct sctp_ifa *sctp_ifa;
199 uint32_t ifa_flags;
200
201 TAILQ_FOREACH(ifn, &ifnet, if_list) {
202 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
203 if (ifa->ifa_addr == NULL) {
204 continue;
205 }
206 if ((ifa->ifa_addr->sa_family != AF_INET) &&
207 (ifa->ifa_addr->sa_family != AF_INET6)
208 ) {
209 /* non inet/inet6 skip */
210 continue;
211 }
212 if (ifa->ifa_addr->sa_family == AF_INET6) {
213 ifa6 = (struct in6_ifaddr *)ifa;
214 ifa_flags = ifa6->ia6_flags;
215 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
216 /* skip unspecifed addresses */
217 continue;
218 }
219 } else if (ifa->ifa_addr->sa_family == AF_INET) {
220 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
221 continue;
222 }
223 }
224 if (sctp_is_desired_interface_type(ifa) == 0) {
225 /* non desired type */
226 continue;
227 }
228 if ((ifa->ifa_addr->sa_family == AF_INET6) ||
229 (ifa->ifa_addr->sa_family == AF_INET)) {
230 if (ifa->ifa_addr->sa_family == AF_INET6) {
231 ifa6 = (struct in6_ifaddr *)ifa;
232 ifa_flags = ifa6->ia6_flags;
233 } else {
234 ifa_flags = 0;
235 }
236 sctp_ifa = sctp_add_addr_to_vrf(vrfid,
237 (void *)ifn,
238 ifn->if_index,
239 ifn->if_type,
240 ifn->if_xname,
241 (void *)ifa,
242 ifa->ifa_addr,
243 ifa_flags, 0
244 );
245 if (sctp_ifa) {
246 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
247 }
248 }
249 }
250 }
251}
252
253
254void
255sctp_init_vrf_list(int vrfid)
256{
257 if (vrfid > SCTP_MAX_VRF_ID)
258 /* can't do that */
259 return;
260
261 /* Don't care about return here */
262 (void)sctp_allocate_vrf(vrfid);
263
264 /*
265 * Now we need to build all the ifn's for this vrf and there
266 * addresses
267 */
268 sctp_init_ifns_for_vrf(vrfid);
269}
270
271static uint8_t first_time = 0;
272
273
274void
275sctp_addr_change(struct ifaddr *ifa, int cmd)
276{
277 struct sctp_ifa *ifap = NULL;
278 uint32_t ifa_flags = 0;
279 struct in6_ifaddr *ifa6;
280
281 /*
282 * BSD only has one VRF, if this changes we will need to hook in the
283 * right things here to get the id to pass to the address managment
284 * routine.
285 */
286 if (first_time == 0) {
287 /* Special test to see if my ::1 will showup with this */
288 first_time = 1;
289 sctp_init_ifns_for_vrf(SCTP_DEFAULT_VRFID);
290 }
291 if ((cmd != RTM_ADD) && (cmd != RTM_DELETE)) {
292 /* don't know what to do with this */
293 return;
294 }
295 if (ifa->ifa_addr == NULL) {
296 return;
297 }
298 if ((ifa->ifa_addr->sa_family != AF_INET) &&
299 (ifa->ifa_addr->sa_family != AF_INET6)
300 ) {
301 /* non inet/inet6 skip */
302 return;
303 }
304 if (ifa->ifa_addr->sa_family == AF_INET6) {
305 ifa6 = (struct in6_ifaddr *)ifa;
306 ifa_flags = ifa6->ia6_flags;
307 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
308 /* skip unspecifed addresses */
309 return;
310 }
311 } else if (ifa->ifa_addr->sa_family == AF_INET) {
312 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
313 return;
314 }
315 }
316 if (sctp_is_desired_interface_type(ifa) == 0) {
317 /* non desired type */
318 return;
319 }
320 if (cmd == RTM_ADD) {
321 ifap = sctp_add_addr_to_vrf(SCTP_DEFAULT_VRFID, (void *)ifa->ifa_ifp,
322 ifa->ifa_ifp->if_index, ifa->ifa_ifp->if_type,
323 ifa->ifa_ifp->if_xname,
324 (void *)ifa, ifa->ifa_addr, ifa_flags, 1);
325 } else if (cmd == RTM_DELETE) {
326
327 sctp_del_addr_from_vrf(SCTP_DEFAULT_VRFID, ifa->ifa_addr,
328 ifa->ifa_ifp->if_index,
329 ifa->ifa_ifp->if_xname
330 );
331 /*
332 * We don't bump refcount here so when it completes the
333 * final delete will happen.
334 */
335 }
336}
337
338struct mbuf *
339sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header,
340 int how, int allonebuf, int type)
341{
342 struct mbuf *m = NULL;
343
344 m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0);
345 if (m == NULL) {
346 /* bad, no memory */
347 return (m);
348 }
349 if (allonebuf) {
350 int siz;
351
352 if (SCTP_BUF_IS_EXTENDED(m)) {
353 siz = SCTP_BUF_EXTEND_SIZE(m);
354 } else {
355 if (want_header)
356 siz = MHLEN;
357 else
358 siz = MLEN;
359 }
360 if (siz < space_needed) {
361 m_freem(m);
362 return (NULL);
363 }
364 }
365 if (SCTP_BUF_NEXT(m)) {
366 sctp_m_freem(SCTP_BUF_NEXT(m));
367 SCTP_BUF_NEXT(m) = NULL;
368 }
369#ifdef SCTP_MBUF_LOGGING
370 if (sctp_logging_level & SCTP_MBUF_LOGGING_ENABLE) {
371 if (SCTP_BUF_IS_EXTENDED(m)) {
372 sctp_log_mb(m, SCTP_MBUF_IALLOC);
373 }
374 }
375#endif
376 return (m);
377}
378
379
380#ifdef SCTP_PACKET_LOGGING
381
382int packet_log_writers = 0;
383int packet_log_end = 0;
384uint8_t packet_log_buffer[SCTP_PACKET_LOG_SIZE];
385
386
387void
388sctp_packet_log(struct mbuf *m, int length)
389{
390 int *lenat, thisone;
391 void *copyto;
392 uint32_t *tick_tock;
393 int total_len;
394 int grabbed_lock = 0;
395 int value, newval, thisend, thisbegin;
396
397 /*
398 * Buffer layout. -sizeof this entry (total_len) -previous end
399 * (value) -ticks of log (ticks) o -ip packet o -as logged -
400 * where this started (thisbegin) x <--end points here
401 */
402 total_len = SCTP_SIZE32((length + (4 * sizeof(int))));
403 /* Log a packet to the buffer. */
404 if (total_len > SCTP_PACKET_LOG_SIZE) {
405 /* Can't log this packet I have not a buffer big enough */
406 return;
407 }
408 if (length < (SCTP_MIN_V4_OVERHEAD + sizeof(struct sctp_cookie_ack_chunk))) {
409 return;
410 }
411 atomic_add_int(&packet_log_writers, 1);
412try_again:
413 if (packet_log_writers > SCTP_PKTLOG_WRITERS_NEED_LOCK) {
414 SCTP_IP_PKTLOG_LOCK();
415 grabbed_lock = 1;
416again_locked:
417 value = packet_log_end;
418 newval = packet_log_end + total_len;
419 if (newval >= SCTP_PACKET_LOG_SIZE) {
420 /* we wrapped */
421 thisbegin = 0;
422 thisend = total_len;
423 } else {
424 thisbegin = packet_log_end;
425 thisend = newval;
426 }
427 if (!(atomic_cmpset_int(&packet_log_end, value, thisend))) {
428 goto again_locked;
429 }
430 } else {
431 value = packet_log_end;
432 newval = packet_log_end + total_len;
433 if (newval >= SCTP_PACKET_LOG_SIZE) {
434 /* we wrapped */
435 thisbegin = 0;
436 thisend = total_len;
437 } else {
438 thisbegin = packet_log_end;
439 thisend = newval;
440 }
441 if (!(atomic_cmpset_int(&packet_log_end, value, thisend))) {
442 goto try_again;
443 }
444 }
445 /* Sanity check */
446 if (thisend >= SCTP_PACKET_LOG_SIZE) {
447 printf("Insanity stops a log thisbegin:%d thisend:%d writers:%d lock:%d end:%d\n",
448 thisbegin,
449 thisend,
450 packet_log_writers,
451 grabbed_lock,
452 packet_log_end);
453 packet_log_end = 0;
454 goto no_log;
455
456 }
457 lenat = (int *)&packet_log_buffer[thisbegin];
458 *lenat = total_len;
459 lenat++;
460 *lenat = value;
461 lenat++;
462 tick_tock = (uint32_t *) lenat;
463 lenat++;
464 *tick_tock = sctp_get_tick_count();
465 copyto = (void *)lenat;
466 thisone = thisend - sizeof(int);
467 lenat = (int *)&packet_log_buffer[thisone];
468 *lenat = thisbegin;
469 if (grabbed_lock) {
470 SCTP_IP_PKTLOG_UNLOCK();
471 grabbed_lock = 0;
472 }
473 m_copydata(m, 0, length, (caddr_t)copyto);
474no_log:
475 if (grabbed_lock) {
476 SCTP_IP_PKTLOG_UNLOCK();
477 }
478 atomic_subtract_int(&packet_log_writers, 1);
479}
480
481
482int
483sctp_copy_out_packet_log(uint8_t * target, int length)
484{
485 /*
486 * We wind through the packet log starting at start copying up to
487 * length bytes out. We return the number of bytes copied.
488 */
489 int tocopy, this_copy;
490 int *lenat;
491 int did_delay = 0;
492
493 tocopy = length;
494 if (length < (2 * sizeof(int))) {
495 /* not enough room */
496 return (0);
497 }
498 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
499 atomic_add_int(&packet_log_writers, SCTP_PKTLOG_WRITERS_NEED_LOCK);
500again:
501 if ((did_delay == 0) && (packet_log_writers != SCTP_PKTLOG_WRITERS_NEED_LOCK)) {
502 /*
503 * we delay here for just a moment hoping the
504 * writer(s) that were present when we entered will
505 * have left and we only have locking ones that will
506 * contend with us for the lock. This does not
507 * assure 100% access, but its good enough for a
508 * logging facility like this.
509 */
510 did_delay = 1;
511 DELAY(10);
512 goto again;
513 }
514 }
515 SCTP_IP_PKTLOG_LOCK();
516 lenat = (int *)target;
517 *lenat = packet_log_end;
518 lenat++;
519 this_copy = min((length - sizeof(int)), SCTP_PACKET_LOG_SIZE);
520 memcpy((void *)lenat, (void *)packet_log_buffer, this_copy);
521 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
522 atomic_subtract_int(&packet_log_writers,
523 SCTP_PKTLOG_WRITERS_NEED_LOCK);
524 }
525 SCTP_IP_PKTLOG_UNLOCK();
526 return (this_copy + sizeof(int));
527}
528
529#endif
2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * a) Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 *
10 * b) Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the distribution.
13 *
14 * c) Neither the name of Cisco Systems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28 * THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31/* $KAME: sctp_output.c,v 1.46 2005/03/06 16:04:17 itojun Exp $ */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: head/sys/netinet/sctp_bsd_addr.c 175751 2008-01-28 10:33:41Z rrs $");
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
52/* Declare all of our malloc named types */
53
54/* Note to Michael/Peter for mac-os,
55 * I think mac has this too since I
56 * do see the M_PCB type, so I
57 * will also put in the mac file the
58 * MALLOC_DECLARE. If this does not
59 * work for mac uncomment the defines for
60 * the strings that we use in Panda, I put
61 * them in comments in the mac-os file.
62 */
63MALLOC_DEFINE(SCTP_M_MAP, "sctp_map", "sctp asoc map descriptor");
64MALLOC_DEFINE(SCTP_M_STRMI, "sctp_stri", "sctp stream in array");
65MALLOC_DEFINE(SCTP_M_STRMO, "sctp_stro", "sctp stream out array");
66MALLOC_DEFINE(SCTP_M_ASC_ADDR, "sctp_aadr", "sctp asconf address");
67MALLOC_DEFINE(SCTP_M_ASC_IT, "sctp_a_it", "sctp asconf iterator");
68MALLOC_DEFINE(SCTP_M_AUTH_CL, "sctp_atcl", "sctp auth chunklist");
69MALLOC_DEFINE(SCTP_M_AUTH_KY, "sctp_atky", "sctp auth key");
70MALLOC_DEFINE(SCTP_M_AUTH_HL, "sctp_athm", "sctp auth hmac list");
71MALLOC_DEFINE(SCTP_M_AUTH_IF, "sctp_athi", "sctp auth info");
72MALLOC_DEFINE(SCTP_M_STRESET, "sctp_stre", "sctp stream reset");
73MALLOC_DEFINE(SCTP_M_CMSG, "sctp_cmsg", "sctp CMSG buffer");
74MALLOC_DEFINE(SCTP_M_COPYAL, "sctp_cpal", "sctp copy all");
75MALLOC_DEFINE(SCTP_M_VRF, "sctp_vrf", "sctp vrf struct");
76MALLOC_DEFINE(SCTP_M_IFA, "sctp_ifa", "sctp ifa struct");
77MALLOC_DEFINE(SCTP_M_IFN, "sctp_ifn", "sctp ifn struct");
78MALLOC_DEFINE(SCTP_M_TIMW, "sctp_timw", "sctp time block");
79MALLOC_DEFINE(SCTP_M_MVRF, "sctp_mvrf", "sctp mvrf pcb list");
80MALLOC_DEFINE(SCTP_M_ITER, "sctp_iter", "sctp iterator control");
81MALLOC_DEFINE(SCTP_M_SOCKOPT, "sctp_socko", "sctp socket option");
82
83
84#if defined(SCTP_USE_THREAD_BASED_ITERATOR)
85void
86sctp_wakeup_iterator(void)
87{
88 wakeup(&sctppcbinfo.iterator_running);
89}
90
91static void
92sctp_iterator_thread(void *v)
93{
94 SCTP_IPI_ITERATOR_WQ_LOCK();
95 sctppcbinfo.iterator_running = 0;
96 while (1) {
97 msleep(&sctppcbinfo.iterator_running,
98 &sctppcbinfo.ipi_iterator_wq_mtx,
99 0, "waiting_for_work", 0);
100 sctp_iterator_worker();
101 }
102}
103
104void
105sctp_startup_iterator(void)
106{
107 int ret;
108
109 ret = kproc_create(sctp_iterator_thread,
110 (void *)NULL,
111 &sctppcbinfo.thread_proc,
112 RFPROC,
113 SCTP_KTHREAD_PAGES,
114 SCTP_KTRHEAD_NAME);
115}
116
117#endif
118
119
120void
121sctp_gather_internal_ifa_flags(struct sctp_ifa *ifa)
122{
123 struct in6_ifaddr *ifa6;
124
125 ifa6 = (struct in6_ifaddr *)ifa->ifa;
126 ifa->flags = ifa6->ia6_flags;
127 if (!ip6_use_deprecated) {
128 if (ifa->flags &
129 IN6_IFF_DEPRECATED) {
130 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
131 } else {
132 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
133 }
134 } else {
135 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
136 }
137 if (ifa->flags &
138 (IN6_IFF_DETACHED |
139 IN6_IFF_ANYCAST |
140 IN6_IFF_NOTREADY)) {
141 ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
142 } else {
143 ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
144 }
145}
146
147
148
149static uint32_t
150sctp_is_desired_interface_type(struct ifaddr *ifa)
151{
152 int result;
153
154 /* check the interface type to see if it's one we care about */
155 switch (ifa->ifa_ifp->if_type) {
156 case IFT_ETHER:
157 case IFT_ISO88023:
158 case IFT_ISO88024:
159 case IFT_ISO88025:
160 case IFT_ISO88026:
161 case IFT_STARLAN:
162 case IFT_P10:
163 case IFT_P80:
164 case IFT_HY:
165 case IFT_FDDI:
166 case IFT_XETHER:
167 case IFT_ISDNBASIC:
168 case IFT_ISDNPRIMARY:
169 case IFT_PTPSERIAL:
170 case IFT_OTHER:
171 case IFT_PPP:
172 case IFT_LOOP:
173 case IFT_SLIP:
174 case IFT_IP:
175 case IFT_IPOVERCDLC:
176 case IFT_IPOVERCLAW:
177 case IFT_VIRTUALIPADDRESS:
178 result = 1;
179 break;
180 default:
181 result = 0;
182 }
183
184 return (result);
185}
186
187static void
188sctp_init_ifns_for_vrf(int vrfid)
189{
190 /*
191 * Here we must apply ANY locks needed by the IFN we access and also
192 * make sure we lock any IFA that exists as we float through the
193 * list of IFA's
194 */
195 struct ifnet *ifn;
196 struct ifaddr *ifa;
197 struct in6_ifaddr *ifa6;
198 struct sctp_ifa *sctp_ifa;
199 uint32_t ifa_flags;
200
201 TAILQ_FOREACH(ifn, &ifnet, if_list) {
202 TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
203 if (ifa->ifa_addr == NULL) {
204 continue;
205 }
206 if ((ifa->ifa_addr->sa_family != AF_INET) &&
207 (ifa->ifa_addr->sa_family != AF_INET6)
208 ) {
209 /* non inet/inet6 skip */
210 continue;
211 }
212 if (ifa->ifa_addr->sa_family == AF_INET6) {
213 ifa6 = (struct in6_ifaddr *)ifa;
214 ifa_flags = ifa6->ia6_flags;
215 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
216 /* skip unspecifed addresses */
217 continue;
218 }
219 } else if (ifa->ifa_addr->sa_family == AF_INET) {
220 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
221 continue;
222 }
223 }
224 if (sctp_is_desired_interface_type(ifa) == 0) {
225 /* non desired type */
226 continue;
227 }
228 if ((ifa->ifa_addr->sa_family == AF_INET6) ||
229 (ifa->ifa_addr->sa_family == AF_INET)) {
230 if (ifa->ifa_addr->sa_family == AF_INET6) {
231 ifa6 = (struct in6_ifaddr *)ifa;
232 ifa_flags = ifa6->ia6_flags;
233 } else {
234 ifa_flags = 0;
235 }
236 sctp_ifa = sctp_add_addr_to_vrf(vrfid,
237 (void *)ifn,
238 ifn->if_index,
239 ifn->if_type,
240 ifn->if_xname,
241 (void *)ifa,
242 ifa->ifa_addr,
243 ifa_flags, 0
244 );
245 if (sctp_ifa) {
246 sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
247 }
248 }
249 }
250 }
251}
252
253
254void
255sctp_init_vrf_list(int vrfid)
256{
257 if (vrfid > SCTP_MAX_VRF_ID)
258 /* can't do that */
259 return;
260
261 /* Don't care about return here */
262 (void)sctp_allocate_vrf(vrfid);
263
264 /*
265 * Now we need to build all the ifn's for this vrf and there
266 * addresses
267 */
268 sctp_init_ifns_for_vrf(vrfid);
269}
270
271static uint8_t first_time = 0;
272
273
274void
275sctp_addr_change(struct ifaddr *ifa, int cmd)
276{
277 struct sctp_ifa *ifap = NULL;
278 uint32_t ifa_flags = 0;
279 struct in6_ifaddr *ifa6;
280
281 /*
282 * BSD only has one VRF, if this changes we will need to hook in the
283 * right things here to get the id to pass to the address managment
284 * routine.
285 */
286 if (first_time == 0) {
287 /* Special test to see if my ::1 will showup with this */
288 first_time = 1;
289 sctp_init_ifns_for_vrf(SCTP_DEFAULT_VRFID);
290 }
291 if ((cmd != RTM_ADD) && (cmd != RTM_DELETE)) {
292 /* don't know what to do with this */
293 return;
294 }
295 if (ifa->ifa_addr == NULL) {
296 return;
297 }
298 if ((ifa->ifa_addr->sa_family != AF_INET) &&
299 (ifa->ifa_addr->sa_family != AF_INET6)
300 ) {
301 /* non inet/inet6 skip */
302 return;
303 }
304 if (ifa->ifa_addr->sa_family == AF_INET6) {
305 ifa6 = (struct in6_ifaddr *)ifa;
306 ifa_flags = ifa6->ia6_flags;
307 if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
308 /* skip unspecifed addresses */
309 return;
310 }
311 } else if (ifa->ifa_addr->sa_family == AF_INET) {
312 if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
313 return;
314 }
315 }
316 if (sctp_is_desired_interface_type(ifa) == 0) {
317 /* non desired type */
318 return;
319 }
320 if (cmd == RTM_ADD) {
321 ifap = sctp_add_addr_to_vrf(SCTP_DEFAULT_VRFID, (void *)ifa->ifa_ifp,
322 ifa->ifa_ifp->if_index, ifa->ifa_ifp->if_type,
323 ifa->ifa_ifp->if_xname,
324 (void *)ifa, ifa->ifa_addr, ifa_flags, 1);
325 } else if (cmd == RTM_DELETE) {
326
327 sctp_del_addr_from_vrf(SCTP_DEFAULT_VRFID, ifa->ifa_addr,
328 ifa->ifa_ifp->if_index,
329 ifa->ifa_ifp->if_xname
330 );
331 /*
332 * We don't bump refcount here so when it completes the
333 * final delete will happen.
334 */
335 }
336}
337
338struct mbuf *
339sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header,
340 int how, int allonebuf, int type)
341{
342 struct mbuf *m = NULL;
343
344 m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0);
345 if (m == NULL) {
346 /* bad, no memory */
347 return (m);
348 }
349 if (allonebuf) {
350 int siz;
351
352 if (SCTP_BUF_IS_EXTENDED(m)) {
353 siz = SCTP_BUF_EXTEND_SIZE(m);
354 } else {
355 if (want_header)
356 siz = MHLEN;
357 else
358 siz = MLEN;
359 }
360 if (siz < space_needed) {
361 m_freem(m);
362 return (NULL);
363 }
364 }
365 if (SCTP_BUF_NEXT(m)) {
366 sctp_m_freem(SCTP_BUF_NEXT(m));
367 SCTP_BUF_NEXT(m) = NULL;
368 }
369#ifdef SCTP_MBUF_LOGGING
370 if (sctp_logging_level & SCTP_MBUF_LOGGING_ENABLE) {
371 if (SCTP_BUF_IS_EXTENDED(m)) {
372 sctp_log_mb(m, SCTP_MBUF_IALLOC);
373 }
374 }
375#endif
376 return (m);
377}
378
379
380#ifdef SCTP_PACKET_LOGGING
381
382int packet_log_writers = 0;
383int packet_log_end = 0;
384uint8_t packet_log_buffer[SCTP_PACKET_LOG_SIZE];
385
386
387void
388sctp_packet_log(struct mbuf *m, int length)
389{
390 int *lenat, thisone;
391 void *copyto;
392 uint32_t *tick_tock;
393 int total_len;
394 int grabbed_lock = 0;
395 int value, newval, thisend, thisbegin;
396
397 /*
398 * Buffer layout. -sizeof this entry (total_len) -previous end
399 * (value) -ticks of log (ticks) o -ip packet o -as logged -
400 * where this started (thisbegin) x <--end points here
401 */
402 total_len = SCTP_SIZE32((length + (4 * sizeof(int))));
403 /* Log a packet to the buffer. */
404 if (total_len > SCTP_PACKET_LOG_SIZE) {
405 /* Can't log this packet I have not a buffer big enough */
406 return;
407 }
408 if (length < (SCTP_MIN_V4_OVERHEAD + sizeof(struct sctp_cookie_ack_chunk))) {
409 return;
410 }
411 atomic_add_int(&packet_log_writers, 1);
412try_again:
413 if (packet_log_writers > SCTP_PKTLOG_WRITERS_NEED_LOCK) {
414 SCTP_IP_PKTLOG_LOCK();
415 grabbed_lock = 1;
416again_locked:
417 value = packet_log_end;
418 newval = packet_log_end + total_len;
419 if (newval >= SCTP_PACKET_LOG_SIZE) {
420 /* we wrapped */
421 thisbegin = 0;
422 thisend = total_len;
423 } else {
424 thisbegin = packet_log_end;
425 thisend = newval;
426 }
427 if (!(atomic_cmpset_int(&packet_log_end, value, thisend))) {
428 goto again_locked;
429 }
430 } else {
431 value = packet_log_end;
432 newval = packet_log_end + total_len;
433 if (newval >= SCTP_PACKET_LOG_SIZE) {
434 /* we wrapped */
435 thisbegin = 0;
436 thisend = total_len;
437 } else {
438 thisbegin = packet_log_end;
439 thisend = newval;
440 }
441 if (!(atomic_cmpset_int(&packet_log_end, value, thisend))) {
442 goto try_again;
443 }
444 }
445 /* Sanity check */
446 if (thisend >= SCTP_PACKET_LOG_SIZE) {
447 printf("Insanity stops a log thisbegin:%d thisend:%d writers:%d lock:%d end:%d\n",
448 thisbegin,
449 thisend,
450 packet_log_writers,
451 grabbed_lock,
452 packet_log_end);
453 packet_log_end = 0;
454 goto no_log;
455
456 }
457 lenat = (int *)&packet_log_buffer[thisbegin];
458 *lenat = total_len;
459 lenat++;
460 *lenat = value;
461 lenat++;
462 tick_tock = (uint32_t *) lenat;
463 lenat++;
464 *tick_tock = sctp_get_tick_count();
465 copyto = (void *)lenat;
466 thisone = thisend - sizeof(int);
467 lenat = (int *)&packet_log_buffer[thisone];
468 *lenat = thisbegin;
469 if (grabbed_lock) {
470 SCTP_IP_PKTLOG_UNLOCK();
471 grabbed_lock = 0;
472 }
473 m_copydata(m, 0, length, (caddr_t)copyto);
474no_log:
475 if (grabbed_lock) {
476 SCTP_IP_PKTLOG_UNLOCK();
477 }
478 atomic_subtract_int(&packet_log_writers, 1);
479}
480
481
482int
483sctp_copy_out_packet_log(uint8_t * target, int length)
484{
485 /*
486 * We wind through the packet log starting at start copying up to
487 * length bytes out. We return the number of bytes copied.
488 */
489 int tocopy, this_copy;
490 int *lenat;
491 int did_delay = 0;
492
493 tocopy = length;
494 if (length < (2 * sizeof(int))) {
495 /* not enough room */
496 return (0);
497 }
498 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
499 atomic_add_int(&packet_log_writers, SCTP_PKTLOG_WRITERS_NEED_LOCK);
500again:
501 if ((did_delay == 0) && (packet_log_writers != SCTP_PKTLOG_WRITERS_NEED_LOCK)) {
502 /*
503 * we delay here for just a moment hoping the
504 * writer(s) that were present when we entered will
505 * have left and we only have locking ones that will
506 * contend with us for the lock. This does not
507 * assure 100% access, but its good enough for a
508 * logging facility like this.
509 */
510 did_delay = 1;
511 DELAY(10);
512 goto again;
513 }
514 }
515 SCTP_IP_PKTLOG_LOCK();
516 lenat = (int *)target;
517 *lenat = packet_log_end;
518 lenat++;
519 this_copy = min((length - sizeof(int)), SCTP_PACKET_LOG_SIZE);
520 memcpy((void *)lenat, (void *)packet_log_buffer, this_copy);
521 if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
522 atomic_subtract_int(&packet_log_writers,
523 SCTP_PKTLOG_WRITERS_NEED_LOCK);
524 }
525 SCTP_IP_PKTLOG_UNLOCK();
526 return (this_copy + sizeof(int));
527}
528
529#endif