2 * Copyright (c) 2001-2008, 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.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
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.
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.
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.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <netinet/sctp_os.h>
37 #include <netinet/sctp_var.h>
38 #include <netinet/sctp_sysctl.h>
39 #include <netinet/sctp_pcb.h>
40 #include <netinet/sctp_header.h>
41 #include <netinet/sctputil.h>
42 #include <netinet/sctp_output.h>
43 #include <netinet/sctp_input.h>
44 #include <netinet/sctp_auth.h>
45 #include <netinet/sctp_indata.h>
46 #include <netinet/sctp_asconf.h>
47 #include <netinet/sctp_bsd_addr.h>
48 #include <netinet/sctp_timer.h>
49 #include <netinet/sctp_crc32.h>
50 #if defined(INET) || defined(INET6)
51 #include <netinet/udp.h>
58 sctp_stop_all_cookie_timers(struct sctp_tcb *stcb)
60 struct sctp_nets *net;
63 * This now not only stops all cookie timers it also stops any INIT
64 * timers as well. This will make sure that the timers are stopped
65 * in all collision cases.
67 SCTP_TCB_LOCK_ASSERT(stcb);
68 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
69 if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) {
70 sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE,
73 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1);
74 } else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) {
75 sctp_timer_stop(SCTP_TIMER_TYPE_INIT,
78 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2);
85 sctp_handle_init(struct mbuf *m, int iphlen, int offset,
86 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
87 struct sctp_init_chunk *cp, struct sctp_inpcb *inp,
88 struct sctp_tcb *stcb, int *abort_no_unlock,
89 uint8_t use_mflowid, uint32_t mflowid,
90 uint32_t vrf_id, uint16_t port)
92 struct sctp_init *init;
95 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_init: handling INIT tcb:%p\n",
100 /* validate length */
101 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_chunk)) {
102 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
103 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
104 use_mflowid, mflowid,
107 *abort_no_unlock = 1;
110 /* validate parameters */
112 if (init->initiate_tag == 0) {
113 /* protocol error... send abort */
114 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
115 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
116 use_mflowid, mflowid,
119 *abort_no_unlock = 1;
122 if (ntohl(init->a_rwnd) < SCTP_MIN_RWND) {
123 /* invalid parameter... send abort */
124 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
125 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
126 use_mflowid, mflowid,
129 *abort_no_unlock = 1;
132 if (init->num_inbound_streams == 0) {
133 /* protocol error... send abort */
134 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
135 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
136 use_mflowid, mflowid,
139 *abort_no_unlock = 1;
142 if (init->num_outbound_streams == 0) {
143 /* protocol error... send abort */
144 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
145 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
146 use_mflowid, mflowid,
149 *abort_no_unlock = 1;
152 if (sctp_validate_init_auth_params(m, offset + sizeof(*cp),
153 offset + ntohs(cp->ch.chunk_length))) {
154 /* auth parameter(s) error... send abort */
155 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
156 "Problem with AUTH parameters");
157 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
158 use_mflowid, mflowid,
161 *abort_no_unlock = 1;
165 * We are only accepting if we have a socket with positive
168 if ((stcb == NULL) &&
169 ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
170 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
171 (inp->sctp_socket == NULL) ||
172 (inp->sctp_socket->so_qlimit == 0))) {
174 * FIX ME ?? What about TCP model and we have a
175 * match/restart case? Actually no fix is needed. the lookup
176 * will always find the existing assoc so stcb would not be
177 * NULL. It may be questionable to do this since we COULD
178 * just send back the INIT-ACK and hope that the app did
179 * accept()'s by the time the COOKIE was sent. But there is
180 * a price to pay for COOKIE generation and I don't want to
181 * pay it on the chance that the app will actually do some
182 * accepts(). The App just looses and should NOT be in this
185 if (SCTP_BASE_SYSCTL(sctp_blackhole) == 0) {
186 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
188 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
189 use_mflowid, mflowid,
194 if ((stcb != NULL) &&
195 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT)) {
196 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending SHUTDOWN-ACK\n");
197 sctp_send_shutdown_ack(stcb, NULL);
198 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
200 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending INIT-ACK\n");
201 sctp_send_initiate_ack(inp, stcb, m, iphlen, offset, src, dst,
203 use_mflowid, mflowid,
205 ((stcb == NULL) ? SCTP_HOLDS_LOCK : SCTP_NOT_LOCKED));
209 SCTP_INP_RUNLOCK(inp);
214 * process peer "INIT/INIT-ACK" chunk returns value < 0 on error
218 sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked
219 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
226 struct sctp_stream_queue_pending *sp;
227 struct sctp_association *asoc;
230 * This function returns the number of streams that have true unsent
231 * data on them. Note that as it looks through it will clean up any
232 * places that have old data that has been sent but left at top of
236 SCTP_TCB_SEND_LOCK(stcb);
237 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
238 /* Check to see if some data queued */
239 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
240 /* sa_ignore FREED_MEMORY */
241 sp = TAILQ_FIRST(&stcb->asoc.strmout[i].outqueue);
245 if ((sp->msg_is_complete) &&
247 (sp->sender_all_done)) {
249 * We are doing differed cleanup. Last time
250 * through when we took all the data the
251 * sender_all_done was not set.
253 if (sp->put_last_out == 0) {
254 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
255 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
261 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
262 TAILQ_REMOVE(&stcb->asoc.strmout[i].outqueue, sp, next);
264 sctp_free_remote_addr(sp->net);
268 sctp_m_freem(sp->data);
271 sctp_free_a_strmoq(stcb, sp, so_locked);
278 SCTP_TCB_SEND_UNLOCK(stcb);
279 return (unsent_data);
283 sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
285 struct sctp_init *init;
286 struct sctp_association *asoc;
287 struct sctp_nets *lnet;
292 /* save off parameters */
293 asoc->peer_vtag = ntohl(init->initiate_tag);
294 asoc->peers_rwnd = ntohl(init->a_rwnd);
296 asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1;
298 if (!TAILQ_EMPTY(&asoc->nets)) {
299 /* update any ssthresh's that may have a default */
300 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
301 lnet->ssthresh = asoc->peers_rwnd;
302 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
303 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION);
307 SCTP_TCB_SEND_LOCK(stcb);
308 if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) {
310 struct sctp_stream_out *outs;
311 struct sctp_stream_queue_pending *sp, *nsp;
312 struct sctp_tmit_chunk *chk, *nchk;
314 /* abandon the upper streams */
315 newcnt = ntohs(init->num_inbound_streams);
316 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
317 if (chk->rec.data.stream_number >= newcnt) {
318 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
319 asoc->send_queue_cnt--;
320 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
321 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
324 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
327 if (chk->data != NULL) {
328 sctp_free_bufspace(stcb, asoc, chk, 1);
329 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
330 0, chk, SCTP_SO_NOT_LOCKED);
332 sctp_m_freem(chk->data);
336 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
337 /* sa_ignore FREED_MEMORY */
341 for (i = newcnt; i < asoc->pre_open_streams; i++) {
342 outs = &asoc->strmout[i];
343 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
344 TAILQ_REMOVE(&outs->outqueue, sp, next);
345 asoc->stream_queue_cnt--;
346 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL,
347 stcb, 0, sp, SCTP_SO_NOT_LOCKED);
349 sctp_m_freem(sp->data);
353 sctp_free_remote_addr(sp->net);
357 sctp_free_a_strmoq(stcb, sp, SCTP_SO_NOT_LOCKED);
358 /* sa_ignore FREED_MEMORY */
362 /* cut back the count */
363 asoc->pre_open_streams = newcnt;
365 SCTP_TCB_SEND_UNLOCK(stcb);
366 asoc->strm_realoutsize = asoc->streamoutcnt = asoc->pre_open_streams;
368 /* EY - nr_sack: initialize highest tsn in nr_mapping_array */
369 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
370 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
371 sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
373 /* This is the next one we expect */
374 asoc->str_reset_seq_in = asoc->asconf_seq_in + 1;
376 asoc->mapping_array_base_tsn = ntohl(init->initial_tsn);
377 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->asconf_seq_in;
379 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
380 /* open the requested streams */
382 if (asoc->strmin != NULL) {
383 /* Free the old ones */
384 struct sctp_queued_to_read *ctl, *nctl;
386 for (i = 0; i < asoc->streamincnt; i++) {
387 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
388 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
389 sctp_free_remote_addr(ctl->whoFrom);
391 sctp_m_freem(ctl->data);
393 sctp_free_a_readq(stcb, ctl);
396 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
398 if (asoc->max_inbound_streams > ntohs(init->num_outbound_streams)) {
399 asoc->streamincnt = ntohs(init->num_outbound_streams);
401 asoc->streamincnt = asoc->max_inbound_streams;
403 SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt *
404 sizeof(struct sctp_stream_in), SCTP_M_STRMI);
405 if (asoc->strmin == NULL) {
406 /* we didn't get memory for the streams! */
407 SCTPDBG(SCTP_DEBUG_INPUT2, "process_init: couldn't get memory for the streams!\n");
410 for (i = 0; i < asoc->streamincnt; i++) {
411 asoc->strmin[i].stream_no = i;
412 asoc->strmin[i].last_sequence_delivered = 0xffff;
413 TAILQ_INIT(&asoc->strmin[i].inqueue);
414 asoc->strmin[i].delivery_started = 0;
417 * load_address_from_init will put the addresses into the
418 * association when the COOKIE is processed or the INIT-ACK is
419 * processed. Both types of COOKIE's existing and new call this
420 * routine. It will remove addresses that are no longer in the
421 * association (for the restarting case where addresses are
422 * removed). Up front when the INIT arrives we will discard it if it
423 * is a restart and new addresses have been added.
425 /* sa_ignore MEMLEAK */
430 * INIT-ACK message processing/consumption returns value < 0 on error
433 sctp_process_init_ack(struct mbuf *m, int iphlen, int offset,
434 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
435 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
436 struct sctp_nets *net, int *abort_no_unlock,
437 uint8_t use_mflowid, uint32_t mflowid,
440 struct sctp_association *asoc;
442 int retval, abort_flag;
443 uint32_t initack_limit;
444 int nat_friendly = 0;
446 /* First verify that we have no illegal param's */
449 op_err = sctp_arethere_unrecognized_parameters(m,
450 (offset + sizeof(struct sctp_init_chunk)),
451 &abort_flag, (struct sctp_chunkhdr *)cp, &nat_friendly);
453 /* Send an abort and notify peer */
454 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
455 *abort_no_unlock = 1;
459 asoc->peer_supports_nat = (uint8_t) nat_friendly;
460 /* process the peer's parameters in the INIT-ACK */
461 retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb);
465 initack_limit = offset + ntohs(cp->ch.chunk_length);
466 /* load all addresses */
467 if ((retval = sctp_load_addresses_from_init(stcb, m,
468 (offset + sizeof(struct sctp_init_chunk)), initack_limit,
470 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
471 "Problem with address parameters");
472 SCTPDBG(SCTP_DEBUG_INPUT1,
473 "Load addresses from INIT causes an abort %d\n",
475 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
476 src, dst, sh, op_err,
477 use_mflowid, mflowid,
479 *abort_no_unlock = 1;
482 /* if the peer doesn't support asconf, flush the asconf queue */
483 if (asoc->asconf_supported == 0) {
484 struct sctp_asconf_addr *param, *nparam;
486 TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
487 TAILQ_REMOVE(&asoc->asconf_queue, param, next);
488 SCTP_FREE(param, SCTP_M_ASC_ADDR);
491 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
492 stcb->asoc.local_hmacs);
494 sctp_queue_op_err(stcb, op_err);
495 /* queuing will steal away the mbuf chain to the out queue */
498 /* extract the cookie and queue it to "echo" it back... */
499 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
500 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
501 stcb->asoc.overall_error_count,
503 SCTP_FROM_SCTP_INPUT,
506 stcb->asoc.overall_error_count = 0;
507 net->error_count = 0;
510 * Cancel the INIT timer, We do this first before queueing the
511 * cookie. We always cancel at the primary to assue that we are
512 * canceling the timer started by the INIT which always goes to the
515 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
516 asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
518 /* calculate the RTO */
519 net->RTO = sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered, sctp_align_safe_nocopy,
520 SCTP_RTT_FROM_NON_DATA);
522 retval = sctp_send_cookie_echo(m, offset, stcb, net);
525 * No cookie, we probably should send a op error. But in any
526 * case if there is no cookie in the INIT-ACK, we can
527 * abandon the peer, its broke.
530 /* We abort with an error of missing mandatory param */
531 op_err = sctp_generate_cause(SCTP_CAUSE_MISSING_PARAM, "");
534 * Expand beyond to include the mandatory
537 struct sctp_inv_mandatory_param *mp;
539 SCTP_BUF_LEN(op_err) =
540 sizeof(struct sctp_inv_mandatory_param);
542 struct sctp_inv_mandatory_param *);
543 /* Subtract the reserved param */
545 htons(sizeof(struct sctp_inv_mandatory_param) - 2);
546 mp->num_param = htonl(1);
547 mp->param = htons(SCTP_STATE_COOKIE);
550 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
551 src, dst, sh, op_err,
552 use_mflowid, mflowid,
554 *abort_no_unlock = 1;
562 sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp,
563 struct sctp_tcb *stcb, struct sctp_nets *net)
565 union sctp_sockstore store;
566 struct sctp_nets *r_net, *f_net;
569 uint16_t old_error_counter;
571 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) {
575 memset(&store, 0, sizeof(store));
576 switch (cp->heartbeat.hb_info.addr_family) {
579 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
580 store.sin.sin_family = cp->heartbeat.hb_info.addr_family;
581 store.sin.sin_len = cp->heartbeat.hb_info.addr_len;
582 store.sin.sin_port = stcb->rport;
583 memcpy(&store.sin.sin_addr, cp->heartbeat.hb_info.address,
584 sizeof(store.sin.sin_addr));
592 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
593 store.sin6.sin6_family = cp->heartbeat.hb_info.addr_family;
594 store.sin6.sin6_len = cp->heartbeat.hb_info.addr_len;
595 store.sin6.sin6_port = stcb->rport;
596 memcpy(&store.sin6.sin6_addr, cp->heartbeat.hb_info.address, sizeof(struct in6_addr));
605 r_net = sctp_findnet(stcb, &store.sa);
607 SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
610 if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
611 (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
612 (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
614 * If the its a HB and it's random value is correct when can
615 * confirm the destination.
617 r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
618 if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
619 stcb->asoc.primary_destination = r_net;
620 r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
621 f_net = TAILQ_FIRST(&stcb->asoc.nets);
622 if (f_net != r_net) {
624 * first one on the list is NOT the primary
625 * sctp_cmpaddr() is much more efficent if
626 * the primary is the first on the list,
629 TAILQ_REMOVE(&stcb->asoc.nets, r_net, sctp_next);
630 TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
634 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
635 stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
636 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
637 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
639 old_error_counter = r_net->error_count;
640 r_net->error_count = 0;
641 r_net->hb_responded = 1;
642 tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
643 tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
644 /* Now lets do a RTO with this */
645 r_net->RTO = sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv, sctp_align_safe_nocopy,
646 SCTP_RTT_FROM_NON_DATA);
647 if (!(r_net->dest_state & SCTP_ADDR_REACHABLE)) {
648 r_net->dest_state |= SCTP_ADDR_REACHABLE;
649 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
650 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
652 if (r_net->dest_state & SCTP_ADDR_PF) {
653 r_net->dest_state &= ~SCTP_ADDR_PF;
654 stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
656 if (old_error_counter > 0) {
657 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
658 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
660 if (r_net == stcb->asoc.primary_destination) {
661 if (stcb->asoc.alternate) {
662 /* release the alternate, primary is good */
663 sctp_free_remote_addr(stcb->asoc.alternate);
664 stcb->asoc.alternate = NULL;
667 /* Mobility adaptation */
669 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
670 SCTP_MOBILITY_BASE) ||
671 sctp_is_mobility_feature_on(stcb->sctp_ep,
672 SCTP_MOBILITY_FASTHANDOFF)) &&
673 sctp_is_mobility_feature_on(stcb->sctp_ep,
674 SCTP_MOBILITY_PRIM_DELETED)) {
676 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_TIMER + SCTP_LOC_7);
677 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
678 SCTP_MOBILITY_FASTHANDOFF)) {
679 sctp_assoc_immediate_retrans(stcb,
680 stcb->asoc.primary_destination);
682 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
683 SCTP_MOBILITY_BASE)) {
684 sctp_move_chunks_from_net(stcb,
685 stcb->asoc.deleted_primary);
687 sctp_delete_prim_timer(stcb->sctp_ep, stcb,
688 stcb->asoc.deleted_primary);
694 sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
697 * return 0 means we want you to proceed with the abort non-zero
698 * means no abort processing
700 struct sctpasochead *head;
702 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_WAIT) {
703 /* generate a new vtag and send init */
704 LIST_REMOVE(stcb, sctp_asocs);
705 stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
706 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
708 * put it in the bucket in the vtag hash of assoc's for the
711 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
712 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
715 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
717 * treat like a case where the cookie expired i.e.: - dump
718 * current cookie. - generate a new vtag. - resend init.
720 /* generate a new vtag and send init */
721 LIST_REMOVE(stcb, sctp_asocs);
722 stcb->asoc.state &= ~SCTP_STATE_COOKIE_ECHOED;
723 stcb->asoc.state |= SCTP_STATE_COOKIE_WAIT;
724 sctp_stop_all_cookie_timers(stcb);
725 sctp_toss_old_cookies(stcb, &stcb->asoc);
726 stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
727 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
729 * put it in the bucket in the vtag hash of assoc's for the
732 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
733 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
740 sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
741 struct sctp_nets *net)
744 * return 0 means we want you to proceed with the abort non-zero
745 * means no abort processing
747 if (stcb->asoc.auth_supported == 0) {
748 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
751 sctp_asconf_send_nat_state_update(stcb, net);
757 sctp_handle_abort(struct sctp_abort_chunk *abort,
758 struct sctp_tcb *stcb, struct sctp_nets *net)
760 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
767 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
771 len = ntohs(abort->ch.chunk_length);
772 if (len > sizeof(struct sctp_chunkhdr)) {
774 * Need to check the cause codes for our two magic nat
775 * aborts which don't kill the assoc necessarily.
777 struct sctp_missing_nat_state *natc;
779 natc = (struct sctp_missing_nat_state *)(abort + 1);
780 error = ntohs(natc->cause);
781 if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
782 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
783 abort->ch.chunk_flags);
784 if (sctp_handle_nat_colliding_state(stcb)) {
787 } else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
788 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
789 abort->ch.chunk_flags);
790 if (sctp_handle_nat_missing_state(stcb, net)) {
797 /* stop any receive timers */
798 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
799 /* notify user of the abort and clean up... */
800 sctp_abort_notification(stcb, 1, error, abort, SCTP_SO_NOT_LOCKED);
802 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
803 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
804 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
805 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
807 #ifdef SCTP_ASOCLOG_OF_TSNS
808 sctp_print_out_track_log(stcb);
810 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
811 so = SCTP_INP_SO(stcb->sctp_ep);
812 atomic_add_int(&stcb->asoc.refcnt, 1);
813 SCTP_TCB_UNLOCK(stcb);
814 SCTP_SOCKET_LOCK(so, 1);
816 atomic_subtract_int(&stcb->asoc.refcnt, 1);
818 stcb->asoc.state |= SCTP_STATE_WAS_ABORTED;
819 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
820 SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
821 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
822 SCTP_SOCKET_UNLOCK(so, 1);
824 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
828 sctp_start_net_timers(struct sctp_tcb *stcb)
830 uint32_t cnt_hb_sent;
831 struct sctp_nets *net;
834 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
836 * For each network start: 1) A pmtu timer. 2) A HB timer 3)
837 * If the dest in unconfirmed send a hb as well if under
838 * max_hb_burst have been sent.
840 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
841 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
842 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
843 (cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
844 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
849 sctp_chunk_output(stcb->sctp_ep, stcb,
850 SCTP_OUTPUT_FROM_COOKIE_ACK,
857 sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
858 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
860 struct sctp_association *asoc;
861 int some_on_streamwheel;
863 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
868 SCTPDBG(SCTP_DEBUG_INPUT2,
869 "sctp_handle_shutdown: handling SHUTDOWN\n");
873 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
874 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
877 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
878 /* Shutdown NOT the expected size */
881 sctp_update_acked(stcb, cp, abort_flag);
886 if (asoc->control_pdapi) {
888 * With a normal shutdown we assume the end of last record.
890 SCTP_INP_READ_LOCK(stcb->sctp_ep);
891 asoc->control_pdapi->end_added = 1;
892 asoc->control_pdapi->pdapi_aborted = 1;
893 asoc->control_pdapi = NULL;
894 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
895 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
896 so = SCTP_INP_SO(stcb->sctp_ep);
897 atomic_add_int(&stcb->asoc.refcnt, 1);
898 SCTP_TCB_UNLOCK(stcb);
899 SCTP_SOCKET_LOCK(so, 1);
901 atomic_subtract_int(&stcb->asoc.refcnt, 1);
902 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
903 /* assoc was freed while we were unlocked */
904 SCTP_SOCKET_UNLOCK(so, 1);
908 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
909 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
910 SCTP_SOCKET_UNLOCK(so, 1);
913 /* goto SHUTDOWN_RECEIVED state to block new requests */
914 if (stcb->sctp_socket) {
915 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
916 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
917 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) {
918 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_RECEIVED);
919 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
921 * notify upper layer that peer has initiated a
924 sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
927 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
930 if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) {
932 * stop the shutdown timer, since we WILL move to
935 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
937 /* Now is there unsent data on a stream somewhere? */
938 some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
940 if (!TAILQ_EMPTY(&asoc->send_queue) ||
941 !TAILQ_EMPTY(&asoc->sent_queue) ||
942 some_on_streamwheel) {
943 /* By returning we will push more data out */
946 /* no outstanding data to send, so move on... */
947 /* send SHUTDOWN-ACK */
948 /* move to SHUTDOWN-ACK-SENT state */
949 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
950 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
951 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
953 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_ACK_SENT);
954 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
955 sctp_stop_timers_for_shutdown(stcb);
956 sctp_send_shutdown_ack(stcb, net);
957 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep,
963 sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
964 struct sctp_tcb *stcb,
965 struct sctp_nets *net)
967 struct sctp_association *asoc;
969 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
972 so = SCTP_INP_SO(stcb->sctp_ep);
974 SCTPDBG(SCTP_DEBUG_INPUT2,
975 "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
980 /* process according to association state */
981 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
982 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
983 /* unexpected SHUTDOWN-ACK... do OOTB handling... */
984 sctp_send_shutdown_complete(stcb, net, 1);
985 SCTP_TCB_UNLOCK(stcb);
988 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
989 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
990 /* unexpected SHUTDOWN-ACK... so ignore... */
991 SCTP_TCB_UNLOCK(stcb);
994 if (asoc->control_pdapi) {
996 * With a normal shutdown we assume the end of last record.
998 SCTP_INP_READ_LOCK(stcb->sctp_ep);
999 asoc->control_pdapi->end_added = 1;
1000 asoc->control_pdapi->pdapi_aborted = 1;
1001 asoc->control_pdapi = NULL;
1002 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
1003 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1004 atomic_add_int(&stcb->asoc.refcnt, 1);
1005 SCTP_TCB_UNLOCK(stcb);
1006 SCTP_SOCKET_LOCK(so, 1);
1007 SCTP_TCB_LOCK(stcb);
1008 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1009 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1010 /* assoc was freed while we were unlocked */
1011 SCTP_SOCKET_UNLOCK(so, 1);
1015 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
1016 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1017 SCTP_SOCKET_UNLOCK(so, 1);
1021 if (!TAILQ_EMPTY(&asoc->send_queue) ||
1022 !TAILQ_EMPTY(&asoc->sent_queue) ||
1023 !stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
1024 panic("Queues are not empty when handling SHUTDOWN-ACK");
1027 /* stop the timer */
1028 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
1029 /* send SHUTDOWN-COMPLETE */
1030 sctp_send_shutdown_complete(stcb, net, 0);
1031 /* notify upper layer protocol */
1032 if (stcb->sctp_socket) {
1033 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1034 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1035 stcb->sctp_socket->so_snd.sb_cc = 0;
1037 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
1039 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
1040 /* free the TCB but first save off the ep */
1041 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1042 atomic_add_int(&stcb->asoc.refcnt, 1);
1043 SCTP_TCB_UNLOCK(stcb);
1044 SCTP_SOCKET_LOCK(so, 1);
1045 SCTP_TCB_LOCK(stcb);
1046 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1048 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1049 SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
1050 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1051 SCTP_SOCKET_UNLOCK(so, 1);
1056 * Skip past the param header and then we will find the chunk that caused the
1057 * problem. There are two possiblities ASCONF or FWD-TSN other than that and
1058 * our peer must be broken.
1061 sctp_process_unrecog_chunk(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr,
1062 struct sctp_nets *net)
1064 struct sctp_chunkhdr *chk;
1066 chk = (struct sctp_chunkhdr *)((caddr_t)phdr + sizeof(*phdr));
1067 switch (chk->chunk_type) {
1068 case SCTP_ASCONF_ACK:
1070 sctp_asconf_cleanup(stcb, net);
1072 case SCTP_FORWARD_CUM_TSN:
1073 stcb->asoc.prsctp_supported = 0;
1076 SCTPDBG(SCTP_DEBUG_INPUT2,
1077 "Peer does not support chunk type %d(%x)??\n",
1078 chk->chunk_type, (uint32_t) chk->chunk_type);
1084 * Skip past the param header and then we will find the param that caused the
1085 * problem. There are a number of param's in a ASCONF OR the prsctp param
1086 * these will turn of specific features.
1087 * XXX: Is this the right thing to do?
1090 sctp_process_unrecog_param(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr)
1092 struct sctp_paramhdr *pbad;
1095 switch (ntohs(pbad->param_type)) {
1097 case SCTP_PRSCTP_SUPPORTED:
1098 stcb->asoc.prsctp_supported = 0;
1100 case SCTP_SUPPORTED_CHUNK_EXT:
1102 /* draft-ietf-tsvwg-addip-sctp */
1103 case SCTP_HAS_NAT_SUPPORT:
1104 stcb->asoc.peer_supports_nat = 0;
1106 case SCTP_ADD_IP_ADDRESS:
1107 case SCTP_DEL_IP_ADDRESS:
1108 case SCTP_SET_PRIM_ADDR:
1109 stcb->asoc.asconf_supported = 0;
1111 case SCTP_SUCCESS_REPORT:
1112 case SCTP_ERROR_CAUSE_IND:
1113 SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
1114 SCTPDBG(SCTP_DEBUG_INPUT2,
1115 "Turning off ASCONF to this strange peer\n");
1116 stcb->asoc.asconf_supported = 0;
1119 SCTPDBG(SCTP_DEBUG_INPUT2,
1120 "Peer does not support param type %d(%x)??\n",
1121 pbad->param_type, (uint32_t) pbad->param_type);
1127 sctp_handle_error(struct sctp_chunkhdr *ch,
1128 struct sctp_tcb *stcb, struct sctp_nets *net)
1131 struct sctp_paramhdr *phdr;
1132 uint16_t error, error_type;
1134 struct sctp_association *asoc;
1137 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1142 /* parse through all of the errors and process */
1144 phdr = (struct sctp_paramhdr *)((caddr_t)ch +
1145 sizeof(struct sctp_chunkhdr));
1146 chklen = ntohs(ch->chunk_length) - sizeof(struct sctp_chunkhdr);
1148 while ((size_t)chklen >= sizeof(struct sctp_paramhdr)) {
1149 /* Process an Error Cause */
1150 error_type = ntohs(phdr->param_type);
1151 error_len = ntohs(phdr->param_length);
1152 if ((error_len > chklen) || (error_len == 0)) {
1153 /* invalid param length for this param */
1154 SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in error param- chunk left:%d errorlen:%d\n",
1159 /* report the first error cause */
1162 switch (error_type) {
1163 case SCTP_CAUSE_INVALID_STREAM:
1164 case SCTP_CAUSE_MISSING_PARAM:
1165 case SCTP_CAUSE_INVALID_PARAM:
1166 case SCTP_CAUSE_NO_USER_DATA:
1167 SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %d back? We have a bug :/ (or do they?)\n",
1170 case SCTP_CAUSE_NAT_COLLIDING_STATE:
1171 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
1173 if (sctp_handle_nat_colliding_state(stcb)) {
1177 case SCTP_CAUSE_NAT_MISSING_STATE:
1178 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
1180 if (sctp_handle_nat_missing_state(stcb, net)) {
1184 case SCTP_CAUSE_STALE_COOKIE:
1186 * We only act if we have echoed a cookie and are
1189 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) {
1192 p = (int *)((caddr_t)phdr + sizeof(*phdr));
1193 /* Save the time doubled */
1194 asoc->cookie_preserve_req = ntohl(*p) << 1;
1195 asoc->stale_cookie_count++;
1196 if (asoc->stale_cookie_count >
1197 asoc->max_init_times) {
1198 sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
1199 /* now free the asoc */
1200 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1201 so = SCTP_INP_SO(stcb->sctp_ep);
1202 atomic_add_int(&stcb->asoc.refcnt, 1);
1203 SCTP_TCB_UNLOCK(stcb);
1204 SCTP_SOCKET_LOCK(so, 1);
1205 SCTP_TCB_LOCK(stcb);
1206 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1208 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1209 SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
1210 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1211 SCTP_SOCKET_UNLOCK(so, 1);
1215 /* blast back to INIT state */
1216 sctp_toss_old_cookies(stcb, &stcb->asoc);
1217 asoc->state &= ~SCTP_STATE_COOKIE_ECHOED;
1218 asoc->state |= SCTP_STATE_COOKIE_WAIT;
1219 sctp_stop_all_cookie_timers(stcb);
1220 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
1223 case SCTP_CAUSE_UNRESOLVABLE_ADDR:
1225 * Nothing we can do here, we don't do hostname
1226 * addresses so if the peer does not like my IPv6
1227 * (or IPv4 for that matter) it does not matter. If
1228 * they don't support that type of address, they can
1229 * NOT possibly get that packet type... i.e. with no
1230 * IPv6 you can't recieve a IPv6 packet. so we can
1231 * safely ignore this one. If we ever added support
1232 * for HOSTNAME Addresses, then we would need to do
1236 case SCTP_CAUSE_UNRECOG_CHUNK:
1237 sctp_process_unrecog_chunk(stcb, phdr, net);
1239 case SCTP_CAUSE_UNRECOG_PARAM:
1240 sctp_process_unrecog_param(stcb, phdr);
1242 case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
1244 * We ignore this since the timer will drive out a
1245 * new cookie anyway and there timer will drive us
1246 * to send a SHUTDOWN_COMPLETE. We can't send one
1247 * here since we don't have their tag.
1250 case SCTP_CAUSE_DELETING_LAST_ADDR:
1251 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1252 case SCTP_CAUSE_DELETING_SRC_ADDR:
1254 * We should NOT get these here, but in a
1257 SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a Operational Error?<%d>?\n",
1260 case SCTP_CAUSE_OUT_OF_RESC:
1262 * And what, pray tell do we do with the fact that
1263 * the peer is out of resources? Not really sure we
1264 * could do anything but abort. I suspect this
1265 * should have came WITH an abort instead of in a
1270 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown error type = 0x%xh\n",
1274 adjust = SCTP_SIZE32(error_len);
1276 phdr = (struct sctp_paramhdr *)((caddr_t)phdr + adjust);
1278 sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, error, ch, SCTP_SO_NOT_LOCKED);
1283 sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
1284 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
1285 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
1286 struct sctp_nets *net, int *abort_no_unlock,
1287 uint8_t use_mflowid, uint32_t mflowid,
1290 struct sctp_init_ack *init_ack;
1291 struct mbuf *op_err;
1293 SCTPDBG(SCTP_DEBUG_INPUT2,
1294 "sctp_handle_init_ack: handling INIT-ACK\n");
1297 SCTPDBG(SCTP_DEBUG_INPUT2,
1298 "sctp_handle_init_ack: TCB is null\n");
1301 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) {
1302 /* Invalid length */
1303 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1304 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1305 src, dst, sh, op_err,
1306 use_mflowid, mflowid,
1308 *abort_no_unlock = 1;
1311 init_ack = &cp->init;
1312 /* validate parameters */
1313 if (init_ack->initiate_tag == 0) {
1314 /* protocol error... send an abort */
1315 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1316 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1317 src, dst, sh, op_err,
1318 use_mflowid, mflowid,
1320 *abort_no_unlock = 1;
1323 if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) {
1324 /* protocol error... send an abort */
1325 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1326 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1327 src, dst, sh, op_err,
1328 use_mflowid, mflowid,
1330 *abort_no_unlock = 1;
1333 if (init_ack->num_inbound_streams == 0) {
1334 /* protocol error... send an abort */
1335 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1336 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1337 src, dst, sh, op_err,
1338 use_mflowid, mflowid,
1340 *abort_no_unlock = 1;
1343 if (init_ack->num_outbound_streams == 0) {
1344 /* protocol error... send an abort */
1345 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1346 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1347 src, dst, sh, op_err,
1348 use_mflowid, mflowid,
1350 *abort_no_unlock = 1;
1353 /* process according to association state... */
1354 switch (stcb->asoc.state & SCTP_STATE_MASK) {
1355 case SCTP_STATE_COOKIE_WAIT:
1356 /* this is the expected state for this chunk */
1357 /* process the INIT-ACK parameters */
1358 if (stcb->asoc.primary_destination->dest_state &
1359 SCTP_ADDR_UNCONFIRMED) {
1361 * The primary is where we sent the INIT, we can
1362 * always consider it confirmed when the INIT-ACK is
1363 * returned. Do this before we load addresses
1366 stcb->asoc.primary_destination->dest_state &=
1367 ~SCTP_ADDR_UNCONFIRMED;
1368 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
1369 stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
1371 if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
1372 net, abort_no_unlock,
1373 use_mflowid, mflowid,
1375 /* error in parsing parameters */
1378 /* update our state */
1379 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
1380 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_ECHOED);
1382 /* reset the RTO calc */
1383 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1384 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1385 stcb->asoc.overall_error_count,
1387 SCTP_FROM_SCTP_INPUT,
1390 stcb->asoc.overall_error_count = 0;
1391 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
1393 * collapse the init timer back in case of a exponential
1396 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
1399 * the send at the end of the inbound data processing will
1400 * cause the cookie to be sent
1403 case SCTP_STATE_SHUTDOWN_SENT:
1404 /* incorrect state... discard */
1406 case SCTP_STATE_COOKIE_ECHOED:
1407 /* incorrect state... discard */
1409 case SCTP_STATE_OPEN:
1410 /* incorrect state... discard */
1412 case SCTP_STATE_EMPTY:
1413 case SCTP_STATE_INUSE:
1415 /* incorrect state... discard */
1419 SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
1423 static struct sctp_tcb *
1424 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1425 struct sockaddr *src, struct sockaddr *dst,
1426 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1427 struct sctp_inpcb *inp, struct sctp_nets **netp,
1428 struct sockaddr *init_src, int *notification,
1429 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1430 uint8_t use_mflowid, uint32_t mflowid,
1431 uint32_t vrf_id, uint16_t port);
1435 * handle a state cookie for an existing association m: input packet mbuf
1436 * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
1437 * "split" mbuf and the cookie signature does not exist offset: offset into
1438 * mbuf to the cookie-echo chunk
1440 static struct sctp_tcb *
1441 sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
1442 struct sockaddr *src, struct sockaddr *dst,
1443 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1444 struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
1445 struct sockaddr *init_src, int *notification,
1446 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1447 uint8_t use_mflowid, uint32_t mflowid,
1448 uint32_t vrf_id, uint16_t port)
1450 struct sctp_association *asoc;
1451 struct sctp_init_chunk *init_cp, init_buf;
1452 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1453 struct sctp_nets *net;
1454 struct mbuf *op_err;
1455 int init_offset, initack_offset, i;
1460 #if defined(SCTP_DETAILED_STR_STATS)
1466 /* I know that the TCB is non-NULL from the caller */
1468 for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
1469 if (asoc->cookie_how[how_indx] == 0)
1472 if (how_indx < sizeof(asoc->cookie_how)) {
1473 asoc->cookie_how[how_indx] = 1;
1475 if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1476 /* SHUTDOWN came in after sending INIT-ACK */
1477 sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
1478 op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
1479 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
1480 use_mflowid, mflowid,
1482 if (how_indx < sizeof(asoc->cookie_how))
1483 asoc->cookie_how[how_indx] = 2;
1487 * find and validate the INIT chunk in the cookie (peer's info) the
1488 * INIT should start after the cookie-echo header struct (chunk
1489 * header, state cookie header struct)
1491 init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
1493 init_cp = (struct sctp_init_chunk *)
1494 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1495 (uint8_t *) & init_buf);
1496 if (init_cp == NULL) {
1497 /* could not pull a INIT chunk in cookie */
1500 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1504 * find and validate the INIT-ACK chunk in the cookie (my info) the
1505 * INIT-ACK follows the INIT chunk
1507 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1508 initack_cp = (struct sctp_init_ack_chunk *)
1509 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1510 (uint8_t *) & initack_buf);
1511 if (initack_cp == NULL) {
1512 /* could not pull INIT-ACK chunk in cookie */
1515 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1518 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1519 (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
1521 * case D in Section 5.2.4 Table 2: MMAA process accordingly
1522 * to get into the OPEN state
1524 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1526 * Opps, this means that we somehow generated two vtag's
1527 * the same. I.e. we did:
1529 * <---INIT(tag=a)------
1530 * ----INIT-ACK(tag=t)-->
1531 * ----INIT(tag=t)------> *1
1532 * <---INIT-ACK(tag=a)---
1533 * <----CE(tag=t)------------- *2
1535 * At point *1 we should be generating a different
1536 * tag t'. Which means we would throw away the CE and send
1537 * ours instead. Basically this is case C (throw away side).
1539 if (how_indx < sizeof(asoc->cookie_how))
1540 asoc->cookie_how[how_indx] = 17;
1544 switch (SCTP_GET_STATE(asoc)) {
1545 case SCTP_STATE_COOKIE_WAIT:
1546 case SCTP_STATE_COOKIE_ECHOED:
1548 * INIT was sent but got a COOKIE_ECHO with the
1549 * correct tags... just accept it...but we must
1550 * process the init so that we can make sure we have
1551 * the right seq no's.
1553 /* First we must process the INIT !! */
1554 retval = sctp_process_init(init_cp, stcb);
1556 if (how_indx < sizeof(asoc->cookie_how))
1557 asoc->cookie_how[how_indx] = 3;
1560 /* we have already processed the INIT so no problem */
1561 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb,
1562 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
1563 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
1564 /* update current state */
1565 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)
1566 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1568 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1570 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1571 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1572 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1573 stcb->sctp_ep, stcb, asoc->primary_destination);
1575 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1576 sctp_stop_all_cookie_timers(stcb);
1577 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1578 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1579 (inp->sctp_socket->so_qlimit == 0)
1581 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1586 * Here is where collision would go if we
1587 * did a connect() and instead got a
1588 * init/init-ack/cookie done before the
1589 * init-ack came back..
1591 stcb->sctp_ep->sctp_flags |=
1592 SCTP_PCB_FLAGS_CONNECTED;
1593 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1594 so = SCTP_INP_SO(stcb->sctp_ep);
1595 atomic_add_int(&stcb->asoc.refcnt, 1);
1596 SCTP_TCB_UNLOCK(stcb);
1597 SCTP_SOCKET_LOCK(so, 1);
1598 SCTP_TCB_LOCK(stcb);
1599 atomic_add_int(&stcb->asoc.refcnt, -1);
1600 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1601 SCTP_SOCKET_UNLOCK(so, 1);
1605 soisconnected(stcb->sctp_socket);
1606 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1607 SCTP_SOCKET_UNLOCK(so, 1);
1610 /* notify upper layer */
1611 *notification = SCTP_NOTIFY_ASSOC_UP;
1613 * since we did not send a HB make sure we don't
1616 net->hb_responded = 1;
1617 net->RTO = sctp_calculate_rto(stcb, asoc, net,
1618 &cookie->time_entered,
1619 sctp_align_unsafe_makecopy,
1620 SCTP_RTT_FROM_NON_DATA);
1622 if (stcb->asoc.sctp_autoclose_ticks &&
1623 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1624 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1630 * we're in the OPEN state (or beyond), so peer must
1631 * have simply lost the COOKIE-ACK
1635 sctp_stop_all_cookie_timers(stcb);
1637 * We ignore the return code here.. not sure if we should
1638 * somehow abort.. but we do have an existing asoc. This
1639 * really should not fail.
1641 if (sctp_load_addresses_from_init(stcb, m,
1642 init_offset + sizeof(struct sctp_init_chunk),
1643 initack_offset, src, dst, init_src)) {
1644 if (how_indx < sizeof(asoc->cookie_how))
1645 asoc->cookie_how[how_indx] = 4;
1648 /* respond with a COOKIE-ACK */
1649 sctp_toss_old_cookies(stcb, asoc);
1650 sctp_send_cookie_ack(stcb);
1651 if (how_indx < sizeof(asoc->cookie_how))
1652 asoc->cookie_how[how_indx] = 5;
1655 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1656 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1657 cookie->tie_tag_my_vtag == 0 &&
1658 cookie->tie_tag_peer_vtag == 0) {
1660 * case C in Section 5.2.4 Table 2: XMOO silently discard
1662 if (how_indx < sizeof(asoc->cookie_how))
1663 asoc->cookie_how[how_indx] = 6;
1667 * If nat support, and the below and stcb is established, send back
1668 * a ABORT(colliding state) if we are established.
1670 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) &&
1671 (asoc->peer_supports_nat) &&
1672 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1673 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1674 (asoc->peer_vtag == 0)))) {
1676 * Special case - Peer's support nat. We may have two init's
1677 * that we gave out the same tag on since one was not
1678 * established.. i.e. we get INIT from host-1 behind the nat
1679 * and we respond tag-a, we get a INIT from host-2 behind
1680 * the nat and we get tag-a again. Then we bring up host-1
1681 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1682 * Now we have colliding state. We must send an abort here
1683 * with colliding state indication.
1685 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1686 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1687 use_mflowid, mflowid,
1691 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1692 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1693 (asoc->peer_vtag == 0))) {
1695 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1696 * should be ok, re-accept peer info
1698 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1700 * Extension of case C. If we hit this, then the
1701 * random number generator returned the same vtag
1702 * when we first sent our INIT-ACK and when we later
1703 * sent our INIT. The side with the seq numbers that
1704 * are different will be the one that normnally
1705 * would have hit case C. This in effect "extends"
1706 * our vtags in this collision case to be 64 bits.
1707 * The same collision could occur aka you get both
1708 * vtag and seq number the same twice in a row.. but
1709 * is much less likely. If it did happen then we
1710 * would proceed through and bring up the assoc.. we
1711 * may end up with the wrong stream setup however..
1712 * which would be bad.. but there is no way to
1713 * tell.. until we send on a stream that does not
1716 if (how_indx < sizeof(asoc->cookie_how))
1717 asoc->cookie_how[how_indx] = 7;
1721 if (how_indx < sizeof(asoc->cookie_how))
1722 asoc->cookie_how[how_indx] = 8;
1723 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
1724 sctp_stop_all_cookie_timers(stcb);
1726 * since we did not send a HB make sure we don't double
1729 net->hb_responded = 1;
1730 if (stcb->asoc.sctp_autoclose_ticks &&
1731 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1732 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1735 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1736 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
1738 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1740 * Ok the peer probably discarded our data (if we
1741 * echoed a cookie+data). So anything on the
1742 * sent_queue should be marked for retransmit, we
1743 * may not get something to kick us so it COULD
1744 * still take a timeout to move these.. but it can't
1745 * hurt to mark them.
1747 struct sctp_tmit_chunk *chk;
1749 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1750 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1751 chk->sent = SCTP_DATAGRAM_RESEND;
1752 sctp_flight_size_decrease(chk);
1753 sctp_total_flight_decrease(stcb, chk);
1754 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1760 /* process the INIT info (peer's info) */
1761 retval = sctp_process_init(init_cp, stcb);
1763 if (how_indx < sizeof(asoc->cookie_how))
1764 asoc->cookie_how[how_indx] = 9;
1767 if (sctp_load_addresses_from_init(stcb, m,
1768 init_offset + sizeof(struct sctp_init_chunk),
1769 initack_offset, src, dst, init_src)) {
1770 if (how_indx < sizeof(asoc->cookie_how))
1771 asoc->cookie_how[how_indx] = 10;
1774 if ((asoc->state & SCTP_STATE_COOKIE_WAIT) ||
1775 (asoc->state & SCTP_STATE_COOKIE_ECHOED)) {
1776 *notification = SCTP_NOTIFY_ASSOC_UP;
1778 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1779 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1780 (inp->sctp_socket->so_qlimit == 0)) {
1781 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1785 stcb->sctp_ep->sctp_flags |=
1786 SCTP_PCB_FLAGS_CONNECTED;
1787 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1788 so = SCTP_INP_SO(stcb->sctp_ep);
1789 atomic_add_int(&stcb->asoc.refcnt, 1);
1790 SCTP_TCB_UNLOCK(stcb);
1791 SCTP_SOCKET_LOCK(so, 1);
1792 SCTP_TCB_LOCK(stcb);
1793 atomic_add_int(&stcb->asoc.refcnt, -1);
1794 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1795 SCTP_SOCKET_UNLOCK(so, 1);
1799 soisconnected(stcb->sctp_socket);
1800 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1801 SCTP_SOCKET_UNLOCK(so, 1);
1804 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)
1805 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1807 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1808 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1809 } else if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
1810 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1812 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1814 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1815 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1816 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1817 stcb->sctp_ep, stcb, asoc->primary_destination);
1819 sctp_stop_all_cookie_timers(stcb);
1820 sctp_toss_old_cookies(stcb, asoc);
1821 sctp_send_cookie_ack(stcb);
1824 * only if we have retrans set do we do this. What
1825 * this call does is get only the COOKIE-ACK out and
1826 * then when we return the normal call to
1827 * sctp_chunk_output will get the retrans out behind
1830 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1832 if (how_indx < sizeof(asoc->cookie_how))
1833 asoc->cookie_how[how_indx] = 11;
1837 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1838 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1839 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1840 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1841 cookie->tie_tag_peer_vtag != 0) {
1842 struct sctpasochead *head;
1844 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1849 if (asoc->peer_supports_nat) {
1851 * This is a gross gross hack. Just call the
1852 * cookie_new code since we are allowing a duplicate
1853 * association. I hope this works...
1855 return (sctp_process_cookie_new(m, iphlen, offset, src, dst,
1856 sh, cookie, cookie_len,
1857 inp, netp, init_src, notification,
1858 auth_skipped, auth_offset, auth_len,
1859 use_mflowid, mflowid,
1863 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1866 if (how_indx < sizeof(asoc->cookie_how))
1867 asoc->cookie_how[how_indx] = 12;
1868 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1869 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
1871 /* notify upper layer */
1872 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1873 atomic_add_int(&stcb->asoc.refcnt, 1);
1874 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_OPEN) &&
1875 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1876 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) {
1877 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1879 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
1880 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1881 } else if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) {
1882 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1884 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1885 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1886 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1887 stcb->sctp_ep, stcb, asoc->primary_destination);
1889 } else if (!(asoc->state & SCTP_STATE_SHUTDOWN_SENT)) {
1890 /* move to OPEN state, if not in SHUTDOWN_SENT */
1891 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1893 asoc->pre_open_streams =
1894 ntohs(initack_cp->init.num_outbound_streams);
1895 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1896 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1897 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1899 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1901 asoc->str_reset_seq_in = asoc->init_seq_number;
1903 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1904 if (asoc->mapping_array) {
1905 memset(asoc->mapping_array, 0,
1906 asoc->mapping_array_size);
1908 if (asoc->nr_mapping_array) {
1909 memset(asoc->nr_mapping_array, 0,
1910 asoc->mapping_array_size);
1912 SCTP_TCB_UNLOCK(stcb);
1913 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1914 so = SCTP_INP_SO(stcb->sctp_ep);
1915 SCTP_SOCKET_LOCK(so, 1);
1917 SCTP_INP_INFO_WLOCK();
1918 SCTP_INP_WLOCK(stcb->sctp_ep);
1919 SCTP_TCB_LOCK(stcb);
1920 atomic_add_int(&stcb->asoc.refcnt, -1);
1921 /* send up all the data */
1922 SCTP_TCB_SEND_LOCK(stcb);
1924 sctp_report_all_outbound(stcb, 0, 1, SCTP_SO_LOCKED);
1925 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1926 stcb->asoc.strmout[i].chunks_on_queues = 0;
1927 #if defined(SCTP_DETAILED_STR_STATS)
1928 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1929 asoc->strmout[i].abandoned_sent[j] = 0;
1930 asoc->strmout[i].abandoned_unsent[j] = 0;
1933 asoc->strmout[i].abandoned_sent[0] = 0;
1934 asoc->strmout[i].abandoned_unsent[0] = 0;
1936 stcb->asoc.strmout[i].stream_no = i;
1937 stcb->asoc.strmout[i].next_sequence_send = 0;
1938 stcb->asoc.strmout[i].last_msg_incomplete = 0;
1940 /* process the INIT-ACK info (my info) */
1941 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
1942 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1944 /* pull from vtag hash */
1945 LIST_REMOVE(stcb, sctp_asocs);
1946 /* re-insert to new vtag position */
1947 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
1948 SCTP_BASE_INFO(hashasocmark))];
1950 * put it in the bucket in the vtag hash of assoc's for the
1953 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
1955 SCTP_TCB_SEND_UNLOCK(stcb);
1956 SCTP_INP_WUNLOCK(stcb->sctp_ep);
1957 SCTP_INP_INFO_WUNLOCK();
1958 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1959 SCTP_SOCKET_UNLOCK(so, 1);
1961 asoc->total_flight = 0;
1962 asoc->total_flight_count = 0;
1963 /* process the INIT info (peer's info) */
1964 retval = sctp_process_init(init_cp, stcb);
1966 if (how_indx < sizeof(asoc->cookie_how))
1967 asoc->cookie_how[how_indx] = 13;
1972 * since we did not send a HB make sure we don't double
1975 net->hb_responded = 1;
1977 if (sctp_load_addresses_from_init(stcb, m,
1978 init_offset + sizeof(struct sctp_init_chunk),
1979 initack_offset, src, dst, init_src)) {
1980 if (how_indx < sizeof(asoc->cookie_how))
1981 asoc->cookie_how[how_indx] = 14;
1985 /* respond with a COOKIE-ACK */
1986 sctp_stop_all_cookie_timers(stcb);
1987 sctp_toss_old_cookies(stcb, asoc);
1988 sctp_send_cookie_ack(stcb);
1989 if (how_indx < sizeof(asoc->cookie_how))
1990 asoc->cookie_how[how_indx] = 15;
1994 if (how_indx < sizeof(asoc->cookie_how))
1995 asoc->cookie_how[how_indx] = 16;
1996 /* all other cases... */
2002 * handle a state cookie for a new association m: input packet mbuf chain--
2003 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
2004 * and the cookie signature does not exist offset: offset into mbuf to the
2005 * cookie-echo chunk length: length of the cookie chunk to: where the init
2006 * was from returns a new TCB
2008 static struct sctp_tcb *
2009 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
2010 struct sockaddr *src, struct sockaddr *dst,
2011 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
2012 struct sctp_inpcb *inp, struct sctp_nets **netp,
2013 struct sockaddr *init_src, int *notification,
2014 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2015 uint8_t use_mflowid, uint32_t mflowid,
2016 uint32_t vrf_id, uint16_t port)
2018 struct sctp_tcb *stcb;
2019 struct sctp_init_chunk *init_cp, init_buf;
2020 struct sctp_init_ack_chunk *initack_cp, initack_buf;
2021 union sctp_sockstore store;
2022 struct sctp_association *asoc;
2023 int init_offset, initack_offset, initack_limit;
2026 uint8_t auth_chunk_buf[SCTP_PARAM_BUFFER_SIZE];
2028 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2031 so = SCTP_INP_SO(inp);
2035 * find and validate the INIT chunk in the cookie (peer's info) the
2036 * INIT should start after the cookie-echo header struct (chunk
2037 * header, state cookie header struct)
2039 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
2040 init_cp = (struct sctp_init_chunk *)
2041 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
2042 (uint8_t *) & init_buf);
2043 if (init_cp == NULL) {
2044 /* could not pull a INIT chunk in cookie */
2045 SCTPDBG(SCTP_DEBUG_INPUT1,
2046 "process_cookie_new: could not pull INIT chunk hdr\n");
2049 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
2050 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
2053 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
2055 * find and validate the INIT-ACK chunk in the cookie (my info) the
2056 * INIT-ACK follows the INIT chunk
2058 initack_cp = (struct sctp_init_ack_chunk *)
2059 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
2060 (uint8_t *) & initack_buf);
2061 if (initack_cp == NULL) {
2062 /* could not pull INIT-ACK chunk in cookie */
2063 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
2066 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
2070 * NOTE: We can't use the INIT_ACK's chk_length to determine the
2071 * "initack_limit" value. This is because the chk_length field
2072 * includes the length of the cookie, but the cookie is omitted when
2073 * the INIT and INIT_ACK are tacked onto the cookie...
2075 initack_limit = offset + cookie_len;
2078 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2083 * Here we do a trick, we set in NULL for the proc/thread argument.
2084 * We do this since in effect we only use the p argument when the
2085 * socket is unbound and we must do an implicit bind. Since we are
2086 * getting a cookie, we cannot be unbound.
2088 stcb = sctp_aloc_assoc(inp, init_src, &error,
2089 ntohl(initack_cp->init.initiate_tag), vrf_id,
2090 (struct thread *)NULL
2093 struct mbuf *op_err;
2095 /* memory problem? */
2096 SCTPDBG(SCTP_DEBUG_INPUT1,
2097 "process_cookie_new: no room for another TCB!\n");
2098 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2099 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2100 src, dst, sh, op_err,
2101 use_mflowid, mflowid,
2105 /* get the correct sctp_nets */
2107 *netp = sctp_findnet(stcb, init_src);
2110 /* get scope variables out of cookie */
2111 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2112 asoc->scope.site_scope = cookie->site_scope;
2113 asoc->scope.local_scope = cookie->local_scope;
2114 asoc->scope.loopback_scope = cookie->loopback_scope;
2116 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2117 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2118 struct mbuf *op_err;
2121 * Houston we have a problem. The EP changed while the
2122 * cookie was in flight. Only recourse is to abort the
2125 atomic_add_int(&stcb->asoc.refcnt, 1);
2126 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2127 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2128 src, dst, sh, op_err,
2129 use_mflowid, mflowid,
2131 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2132 SCTP_TCB_UNLOCK(stcb);
2133 SCTP_SOCKET_LOCK(so, 1);
2134 SCTP_TCB_LOCK(stcb);
2136 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2137 SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
2138 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2139 SCTP_SOCKET_UNLOCK(so, 1);
2141 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2144 /* process the INIT-ACK info (my info) */
2145 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2146 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2147 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
2148 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
2149 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
2150 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
2151 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
2152 asoc->str_reset_seq_in = asoc->init_seq_number;
2154 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
2156 /* process the INIT info (peer's info) */
2158 retval = sctp_process_init(init_cp, stcb);
2162 atomic_add_int(&stcb->asoc.refcnt, 1);
2163 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2164 SCTP_TCB_UNLOCK(stcb);
2165 SCTP_SOCKET_LOCK(so, 1);
2166 SCTP_TCB_LOCK(stcb);
2168 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
2169 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2170 SCTP_SOCKET_UNLOCK(so, 1);
2172 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2175 /* load all addresses */
2176 if (sctp_load_addresses_from_init(stcb, m,
2177 init_offset + sizeof(struct sctp_init_chunk), initack_offset,
2178 src, dst, init_src)) {
2179 atomic_add_int(&stcb->asoc.refcnt, 1);
2180 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2181 SCTP_TCB_UNLOCK(stcb);
2182 SCTP_SOCKET_LOCK(so, 1);
2183 SCTP_TCB_LOCK(stcb);
2185 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_17);
2186 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2187 SCTP_SOCKET_UNLOCK(so, 1);
2189 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2193 * verify any preceding AUTH chunk that was skipped
2195 /* pull the local authentication parameters from the cookie/init-ack */
2196 sctp_auth_get_cookie_params(stcb, m,
2197 initack_offset + sizeof(struct sctp_init_ack_chunk),
2198 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2200 struct sctp_auth_chunk *auth;
2202 auth = (struct sctp_auth_chunk *)
2203 sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2204 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2205 /* auth HMAC failed, dump the assoc and packet */
2206 SCTPDBG(SCTP_DEBUG_AUTH1,
2207 "COOKIE-ECHO: AUTH failed\n");
2208 atomic_add_int(&stcb->asoc.refcnt, 1);
2209 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2210 SCTP_TCB_UNLOCK(stcb);
2211 SCTP_SOCKET_LOCK(so, 1);
2212 SCTP_TCB_LOCK(stcb);
2214 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2215 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2216 SCTP_SOCKET_UNLOCK(so, 1);
2218 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2221 /* remaining chunks checked... good to go */
2222 stcb->asoc.authenticated = 1;
2225 /* update current state */
2226 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2227 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
2228 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2229 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2230 stcb->sctp_ep, stcb, asoc->primary_destination);
2232 sctp_stop_all_cookie_timers(stcb);
2233 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2234 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2237 * if we're doing ASCONFs, check to see if we have any new local
2238 * addresses that need to get added to the peer (eg. addresses
2239 * changed while cookie echo in flight). This needs to be done
2240 * after we go to the OPEN state to do the correct asconf
2241 * processing. else, make sure we have the correct addresses in our
2245 /* warning, we re-use sin, sin6, sa_store here! */
2246 /* pull in local_address (our "from" address) */
2247 switch (cookie->laddr_type) {
2249 case SCTP_IPV4_ADDRESS:
2250 /* source addr is IPv4 */
2251 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2252 store.sin.sin_family = AF_INET;
2253 store.sin.sin_len = sizeof(struct sockaddr_in);
2254 store.sin.sin_addr.s_addr = cookie->laddress[0];
2258 case SCTP_IPV6_ADDRESS:
2259 /* source addr is IPv6 */
2260 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2261 store.sin6.sin6_family = AF_INET6;
2262 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2263 store.sin6.sin6_scope_id = cookie->scope_id;
2264 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2268 atomic_add_int(&stcb->asoc.refcnt, 1);
2269 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2270 SCTP_TCB_UNLOCK(stcb);
2271 SCTP_SOCKET_LOCK(so, 1);
2272 SCTP_TCB_LOCK(stcb);
2274 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2275 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2276 SCTP_SOCKET_UNLOCK(so, 1);
2278 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2282 /* set up to notify upper layer */
2283 *notification = SCTP_NOTIFY_ASSOC_UP;
2284 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2285 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2286 (inp->sctp_socket->so_qlimit == 0)) {
2288 * This is an endpoint that called connect() how it got a
2289 * cookie that is NEW is a bit of a mystery. It must be that
2290 * the INIT was sent, but before it got there.. a complete
2291 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2292 * should have went to the other code.. not here.. oh well..
2293 * a bit of protection is worth having..
2295 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2296 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2297 atomic_add_int(&stcb->asoc.refcnt, 1);
2298 SCTP_TCB_UNLOCK(stcb);
2299 SCTP_SOCKET_LOCK(so, 1);
2300 SCTP_TCB_LOCK(stcb);
2301 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2302 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2303 SCTP_SOCKET_UNLOCK(so, 1);
2307 soisconnected(stcb->sctp_socket);
2308 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2309 SCTP_SOCKET_UNLOCK(so, 1);
2311 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2312 (inp->sctp_socket->so_qlimit)) {
2314 * We don't want to do anything with this one. Since it is
2315 * the listening guy. The timer will get started for
2316 * accepted connections in the caller.
2320 /* since we did not send a HB make sure we don't double things */
2321 if ((netp) && (*netp))
2322 (*netp)->hb_responded = 1;
2324 if (stcb->asoc.sctp_autoclose_ticks &&
2325 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2326 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2328 /* calculate the RTT */
2329 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2330 if ((netp) && (*netp)) {
2331 (*netp)->RTO = sctp_calculate_rto(stcb, asoc, *netp,
2332 &cookie->time_entered, sctp_align_unsafe_makecopy,
2333 SCTP_RTT_FROM_NON_DATA);
2335 /* respond with a COOKIE-ACK */
2336 sctp_send_cookie_ack(stcb);
2339 * check the address lists for any ASCONFs that need to be sent
2340 * AFTER the cookie-ack is sent
2342 sctp_check_address_list(stcb, m,
2343 initack_offset + sizeof(struct sctp_init_ack_chunk),
2344 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2345 &store.sa, cookie->local_scope, cookie->site_scope,
2346 cookie->ipv4_scope, cookie->loopback_scope);
2353 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2354 * we NEED to make sure we are not already using the vtag. If so we
2355 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2356 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2357 SCTP_BASE_INFO(hashasocmark))];
2358 LIST_FOREACH(stcb, head, sctp_asocs) {
2359 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2360 -- SEND ABORT - TRY AGAIN --
2366 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2367 * existing (non-NULL) TCB
2369 static struct mbuf *
2370 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2371 struct sockaddr *src, struct sockaddr *dst,
2372 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2373 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2374 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2375 struct sctp_tcb **locked_tcb,
2376 uint8_t use_mflowid, uint32_t mflowid,
2377 uint32_t vrf_id, uint16_t port)
2379 struct sctp_state_cookie *cookie;
2380 struct sctp_tcb *l_stcb = *stcb;
2381 struct sctp_inpcb *l_inp;
2382 struct sockaddr *to;
2383 struct sctp_pcb *ep;
2385 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2387 uint8_t cookie_ok = 0;
2388 unsigned int sig_offset, cookie_offset;
2389 unsigned int cookie_len;
2391 struct timeval time_expires;
2392 int notification = 0;
2393 struct sctp_nets *netl;
2394 int had_a_existing_tcb = 0;
2395 int send_int_conf = 0;
2398 struct sockaddr_in sin;
2402 struct sockaddr_in6 sin6;
2406 SCTPDBG(SCTP_DEBUG_INPUT2,
2407 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2409 if (inp_p == NULL) {
2412 cookie = &cp->cookie;
2413 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2414 cookie_len = ntohs(cp->ch.chunk_length);
2416 if ((cookie->peerport != sh->src_port) &&
2417 (cookie->myport != sh->dest_port) &&
2418 (cookie->my_vtag != sh->v_tag)) {
2420 * invalid ports or bad tag. Note that we always leave the
2421 * v_tag in the header in network order and when we stored
2422 * it in the my_vtag slot we also left it in network order.
2423 * This maintains the match even though it may be in the
2424 * opposite byte order of the machine :->
2428 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2429 sizeof(struct sctp_init_chunk) +
2430 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2431 /* cookie too small */
2435 * split off the signature into its own mbuf (since it should not be
2436 * calculated in the sctp_hmac_m() call).
2438 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2439 m_sig = m_split(m, sig_offset, M_NOWAIT);
2440 if (m_sig == NULL) {
2441 /* out of memory or ?? */
2444 #ifdef SCTP_MBUF_LOGGING
2445 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2448 for (mat = m_sig; mat; mat = SCTP_BUF_NEXT(mat)) {
2449 if (SCTP_BUF_IS_EXTENDED(mat)) {
2450 sctp_log_mb(mat, SCTP_MBUF_SPLIT);
2457 * compute the signature/digest for the cookie
2459 ep = &(*inp_p)->sctp_ep;
2462 SCTP_TCB_UNLOCK(l_stcb);
2464 SCTP_INP_RLOCK(l_inp);
2466 SCTP_TCB_LOCK(l_stcb);
2468 /* which cookie is it? */
2469 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2470 (ep->current_secret_number != ep->last_secret_number)) {
2471 /* it's the old cookie */
2472 (void)sctp_hmac_m(SCTP_HMAC,
2473 (uint8_t *) ep->secret_key[(int)ep->last_secret_number],
2474 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2476 /* it's the current cookie */
2477 (void)sctp_hmac_m(SCTP_HMAC,
2478 (uint8_t *) ep->secret_key[(int)ep->current_secret_number],
2479 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2481 /* get the signature */
2482 SCTP_INP_RUNLOCK(l_inp);
2483 sig = (uint8_t *) sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *) & tmp_sig);
2485 /* couldn't find signature */
2486 sctp_m_freem(m_sig);
2489 /* compare the received digest with the computed digest */
2490 if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2491 /* try the old cookie? */
2492 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2493 (ep->current_secret_number != ep->last_secret_number)) {
2494 /* compute digest with old */
2495 (void)sctp_hmac_m(SCTP_HMAC,
2496 (uint8_t *) ep->secret_key[(int)ep->last_secret_number],
2497 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2499 if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2507 * Now before we continue we must reconstruct our mbuf so that
2508 * normal processing of any other chunks will work.
2514 while (SCTP_BUF_NEXT(m_at) != NULL) {
2515 m_at = SCTP_BUF_NEXT(m_at);
2517 SCTP_BUF_NEXT(m_at) = m_sig;
2520 if (cookie_ok == 0) {
2521 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2522 SCTPDBG(SCTP_DEBUG_INPUT2,
2523 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2524 (uint32_t) offset, cookie_offset, sig_offset);
2528 * check the cookie timestamps to be sure it's not stale
2530 (void)SCTP_GETTIME_TIMEVAL(&now);
2531 /* Expire time is in Ticks, so we convert to seconds */
2532 time_expires.tv_sec = cookie->time_entered.tv_sec + TICKS_TO_SEC(cookie->cookie_life);
2533 time_expires.tv_usec = cookie->time_entered.tv_usec;
2535 * TODO sctp_constants.h needs alternative time macros when _KERNEL
2538 if (timevalcmp(&now, &time_expires, >)) {
2539 /* cookie is stale! */
2540 struct mbuf *op_err;
2541 struct sctp_stale_cookie_msg *scm;
2544 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_stale_cookie_msg),
2545 0, M_NOWAIT, 1, MT_DATA);
2546 if (op_err == NULL) {
2551 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_stale_cookie_msg);
2552 scm = mtod(op_err, struct sctp_stale_cookie_msg *);
2553 scm->ph.param_type = htons(SCTP_CAUSE_STALE_COOKIE);
2554 scm->ph.param_length = htons((sizeof(struct sctp_paramhdr) +
2555 (sizeof(uint32_t))));
2556 /* seconds to usec */
2557 tim = (now.tv_sec - time_expires.tv_sec) * 1000000;
2560 tim = now.tv_usec - cookie->time_entered.tv_usec;
2561 scm->time_usec = htonl(tim);
2562 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2563 use_mflowid, mflowid,
2568 * Now we must see with the lookup address if we have an existing
2569 * asoc. This will only happen if we were in the COOKIE-WAIT state
2570 * and a INIT collided with us and somewhere the peer sent the
2571 * cookie on another address besides the single address our assoc
2572 * had for him. In this case we will have one of the tie-tags set at
2573 * least AND the address field in the cookie can be used to look it
2577 switch (cookie->addr_type) {
2579 case SCTP_IPV6_ADDRESS:
2580 memset(&sin6, 0, sizeof(sin6));
2581 sin6.sin6_family = AF_INET6;
2582 sin6.sin6_len = sizeof(sin6);
2583 sin6.sin6_port = sh->src_port;
2584 sin6.sin6_scope_id = cookie->scope_id;
2585 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2586 sizeof(sin6.sin6_addr.s6_addr));
2587 to = (struct sockaddr *)&sin6;
2591 case SCTP_IPV4_ADDRESS:
2592 memset(&sin, 0, sizeof(sin));
2593 sin.sin_family = AF_INET;
2594 sin.sin_len = sizeof(sin);
2595 sin.sin_port = sh->src_port;
2596 sin.sin_addr.s_addr = cookie->address[0];
2597 to = (struct sockaddr *)&sin;
2601 /* This should not happen */
2604 if ((*stcb == NULL) && to) {
2605 /* Yep, lets check */
2606 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2607 if (*stcb == NULL) {
2609 * We should have only got back the same inp. If we
2610 * got back a different ep we have a problem. The
2611 * original findep got back l_inp and now
2613 if (l_inp != *inp_p) {
2614 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2617 if (*locked_tcb == NULL) {
2619 * In this case we found the assoc only
2620 * after we locked the create lock. This
2621 * means we are in a colliding case and we
2622 * must make sure that we unlock the tcb if
2623 * its one of the cases where we throw away
2624 * the incoming packets.
2626 *locked_tcb = *stcb;
2629 * We must also increment the inp ref count
2630 * since the ref_count flags was set when we
2631 * did not find the TCB, now we found it
2632 * which reduces the refcount.. we must
2633 * raise it back out to balance it all :-)
2635 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2636 if ((*stcb)->sctp_ep != l_inp) {
2637 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2638 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2646 cookie_len -= SCTP_SIGNATURE_SIZE;
2647 if (*stcb == NULL) {
2648 /* this is the "normal" case... get a new TCB */
2649 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2650 cookie, cookie_len, *inp_p,
2651 netp, to, ¬ification,
2652 auth_skipped, auth_offset, auth_len,
2653 use_mflowid, mflowid,
2656 /* this is abnormal... cookie-echo on existing TCB */
2657 had_a_existing_tcb = 1;
2658 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2660 cookie, cookie_len, *inp_p, *stcb, netp, to,
2661 ¬ification, auth_skipped, auth_offset, auth_len,
2662 use_mflowid, mflowid,
2666 if (*stcb == NULL) {
2667 /* still no TCB... must be bad cookie-echo */
2670 if ((*netp != NULL) && (use_mflowid != 0)) {
2671 (*netp)->flowid = mflowid;
2673 (*netp)->flowidset = 1;
2677 * Ok, we built an association so confirm the address we sent the
2680 netl = sctp_findnet(*stcb, to);
2682 * This code should in theory NOT run but
2685 /* TSNH! Huh, why do I need to add this address here? */
2686 if (sctp_add_remote_addr(*stcb, to, NULL, SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2689 netl = sctp_findnet(*stcb, to);
2692 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2693 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2694 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2699 sctp_start_net_timers(*stcb);
2700 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2701 if (!had_a_existing_tcb ||
2702 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2704 * If we have a NEW cookie or the connect never
2705 * reached the connected state during collision we
2706 * must do the TCP accept thing.
2708 struct socket *so, *oso;
2709 struct sctp_inpcb *inp;
2711 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2713 * For a restart we will keep the same
2714 * socket, no need to do anything. I THINK!!
2716 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2717 if (send_int_conf) {
2718 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2719 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2723 oso = (*inp_p)->sctp_socket;
2724 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2725 SCTP_TCB_UNLOCK((*stcb));
2726 CURVNET_SET(oso->so_vnet);
2727 so = sonewconn(oso, 0
2730 SCTP_TCB_LOCK((*stcb));
2731 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2734 struct mbuf *op_err;
2736 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2737 struct socket *pcb_so;
2740 /* Too many sockets */
2741 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2742 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2743 sctp_abort_association(*inp_p, NULL, m, iphlen,
2744 src, dst, sh, op_err,
2745 use_mflowid, mflowid,
2747 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2748 pcb_so = SCTP_INP_SO(*inp_p);
2749 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2750 SCTP_TCB_UNLOCK((*stcb));
2751 SCTP_SOCKET_LOCK(pcb_so, 1);
2752 SCTP_TCB_LOCK((*stcb));
2753 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2755 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2756 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2757 SCTP_SOCKET_UNLOCK(pcb_so, 1);
2761 inp = (struct sctp_inpcb *)so->so_pcb;
2762 SCTP_INP_INCR_REF(inp);
2764 * We add the unbound flag here so that if we get an
2765 * soabort() before we get the move_pcb done, we
2766 * will properly cleanup.
2768 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2769 SCTP_PCB_FLAGS_CONNECTED |
2770 SCTP_PCB_FLAGS_IN_TCPPOOL |
2771 SCTP_PCB_FLAGS_UNBOUND |
2772 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2773 SCTP_PCB_FLAGS_DONT_WAKE);
2774 inp->sctp_features = (*inp_p)->sctp_features;
2775 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2776 inp->sctp_socket = so;
2777 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2778 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2779 inp->ecn_supported = (*inp_p)->ecn_supported;
2780 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2781 inp->auth_supported = (*inp_p)->auth_supported;
2782 inp->asconf_supported = (*inp_p)->asconf_supported;
2783 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2784 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2785 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2786 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2787 inp->sctp_context = (*inp_p)->sctp_context;
2788 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2789 inp->inp_starting_point_for_iterator = NULL;
2791 * copy in the authentication parameters from the
2794 if (inp->sctp_ep.local_hmacs)
2795 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2796 inp->sctp_ep.local_hmacs =
2797 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2798 if (inp->sctp_ep.local_auth_chunks)
2799 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2800 inp->sctp_ep.local_auth_chunks =
2801 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2804 * Now we must move it from one hash table to
2805 * another and get the tcb in the right place.
2809 * This is where the one-2-one socket is put into
2810 * the accept state waiting for the accept!
2813 (*stcb)->asoc.state |= SCTP_STATE_IN_ACCEPT_QUEUE;
2815 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2817 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2818 SCTP_TCB_UNLOCK((*stcb));
2820 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2822 SCTP_TCB_LOCK((*stcb));
2823 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2827 * now we must check to see if we were aborted while
2828 * the move was going on and the lock/unlock
2831 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2833 * yep it was, we leave the assoc attached
2834 * to the socket since the sctp_inpcb_free()
2835 * call will send an abort for us.
2837 SCTP_INP_DECR_REF(inp);
2840 SCTP_INP_DECR_REF(inp);
2841 /* Switch over to the new guy */
2843 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2844 if (send_int_conf) {
2845 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2846 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2849 * Pull it from the incomplete queue and wake the
2852 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2853 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2854 SCTP_TCB_UNLOCK((*stcb));
2855 SCTP_SOCKET_LOCK(so, 1);
2858 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2859 SCTP_TCB_LOCK((*stcb));
2860 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2861 SCTP_SOCKET_UNLOCK(so, 1);
2867 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2869 if (send_int_conf) {
2870 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2871 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2877 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2878 struct sctp_tcb *stcb, struct sctp_nets *net)
2880 /* cp must not be used, others call this without a c-ack :-) */
2881 struct sctp_association *asoc;
2883 SCTPDBG(SCTP_DEBUG_INPUT2,
2884 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2885 if ((stcb == NULL) || (net == NULL)) {
2890 sctp_stop_all_cookie_timers(stcb);
2891 /* process according to association state */
2892 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) {
2893 /* state change only needed when I am in right state */
2894 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2895 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
2896 sctp_start_net_timers(stcb);
2897 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2898 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2899 stcb->sctp_ep, stcb, asoc->primary_destination);
2903 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2904 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2905 if (asoc->overall_error_count == 0) {
2906 net->RTO = sctp_calculate_rto(stcb, asoc, net,
2907 &asoc->time_entered, sctp_align_safe_nocopy,
2908 SCTP_RTT_FROM_NON_DATA);
2910 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2911 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2912 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2913 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2914 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2918 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2919 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2920 so = SCTP_INP_SO(stcb->sctp_ep);
2921 atomic_add_int(&stcb->asoc.refcnt, 1);
2922 SCTP_TCB_UNLOCK(stcb);
2923 SCTP_SOCKET_LOCK(so, 1);
2924 SCTP_TCB_LOCK(stcb);
2925 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2927 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
2928 soisconnected(stcb->sctp_socket);
2930 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2931 SCTP_SOCKET_UNLOCK(so, 1);
2935 * since we did not send a HB make sure we don't double
2938 net->hb_responded = 1;
2940 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2942 * We don't need to do the asconf thing, nor hb or
2943 * autoclose if the socket is closed.
2947 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
2951 if (stcb->asoc.sctp_autoclose_ticks &&
2952 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2953 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
2954 stcb->sctp_ep, stcb, NULL);
2957 * send ASCONF if parameters are pending and ASCONFs are
2958 * allowed (eg. addresses changed when init/cookie echo were
2961 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
2962 (stcb->asoc.asconf_supported == 1) &&
2963 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
2964 #ifdef SCTP_TIMER_BASED_ASCONF
2965 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2966 stcb->sctp_ep, stcb,
2967 stcb->asoc.primary_destination);
2969 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2970 SCTP_ADDR_NOT_LOCKED);
2975 /* Toss the cookie if I can */
2976 sctp_toss_old_cookies(stcb, asoc);
2977 if (!TAILQ_EMPTY(&asoc->sent_queue)) {
2978 /* Restart the timer if we have pending data */
2979 struct sctp_tmit_chunk *chk;
2981 chk = TAILQ_FIRST(&asoc->sent_queue);
2982 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
2987 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
2988 struct sctp_tcb *stcb)
2990 struct sctp_nets *net;
2991 struct sctp_tmit_chunk *lchk;
2992 struct sctp_ecne_chunk bkup;
2993 uint8_t override_bit;
2994 uint32_t tsn, window_data_tsn;
2996 unsigned int pkt_cnt;
2998 len = ntohs(cp->ch.chunk_length);
2999 if ((len != sizeof(struct sctp_ecne_chunk)) &&
3000 (len != sizeof(struct old_sctp_ecne_chunk))) {
3003 if (len == sizeof(struct old_sctp_ecne_chunk)) {
3004 /* Its the old format */
3005 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
3006 bkup.num_pkts_since_cwr = htonl(1);
3009 SCTP_STAT_INCR(sctps_recvecne);
3010 tsn = ntohl(cp->tsn);
3011 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
3012 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
3014 window_data_tsn = stcb->asoc.sending_seq - 1;
3016 window_data_tsn = lchk->rec.data.TSN_seq;
3019 /* Find where it was sent to if possible. */
3021 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
3022 if (lchk->rec.data.TSN_seq == tsn) {
3024 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
3027 if (SCTP_TSN_GT(lchk->rec.data.TSN_seq, tsn)) {
3033 * What to do. A previous send of a CWR was possibly lost.
3034 * See how old it is, we may have it marked on the actual
3037 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3038 if (tsn == net->last_cwr_tsn) {
3039 /* Found him, send it off */
3045 * If we reach here, we need to send a special CWR
3046 * that says hey, we did this a long time ago and
3047 * you lost the response.
3049 net = TAILQ_FIRST(&stcb->asoc.nets);
3054 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
3061 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
3062 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3064 * JRS - Use the congestion control given in the pluggable
3067 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
3069 * We reduce once every RTT. So we will only lower cwnd at
3070 * the next sending seq i.e. the window_data_tsn
3072 net->cwr_window_tsn = window_data_tsn;
3073 net->ecn_ce_pkt_cnt += pkt_cnt;
3074 net->lost_cnt = pkt_cnt;
3075 net->last_cwr_tsn = tsn;
3077 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
3078 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
3079 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3081 * Another loss in the same window update how many
3082 * marks/packets lost we have had.
3086 if (pkt_cnt > net->lost_cnt) {
3087 /* Should be the case */
3088 cnt = (pkt_cnt - net->lost_cnt);
3089 net->ecn_ce_pkt_cnt += cnt;
3091 net->lost_cnt = pkt_cnt;
3092 net->last_cwr_tsn = tsn;
3094 * Most CC functions will ignore this call, since we
3095 * are in-window yet of the initial CE the peer saw.
3097 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
3101 * We always send a CWR this way if our previous one was lost our
3102 * peer will get an update, or if it is not time again to reduce we
3103 * still get the cwr to the peer. Note we set the override when we
3104 * could not find the TSN on the chunk or the destination network.
3106 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
3110 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
3113 * Here we get a CWR from the peer. We must look in the outqueue and
3114 * make sure that we have a covered ECNE in the control chunk part.
3117 struct sctp_tmit_chunk *chk;
3118 struct sctp_ecne_chunk *ecne;
3122 cwr_tsn = ntohl(cp->tsn);
3124 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
3125 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
3126 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
3129 if ((override == 0) && (chk->whoTo != net)) {
3130 /* Must be from the right src unless override is set */
3133 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
3134 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
3135 /* this covers this ECNE, we can remove it */
3136 stcb->asoc.ecn_echo_cnt_onq--;
3137 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
3140 sctp_m_freem(chk->data);
3143 stcb->asoc.ctrl_queue_cnt--;
3144 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3145 if (override == 0) {
3153 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3154 struct sctp_tcb *stcb, struct sctp_nets *net)
3156 struct sctp_association *asoc;
3158 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3163 SCTPDBG(SCTP_DEBUG_INPUT2,
3164 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3169 /* process according to association state */
3170 if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3171 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3172 SCTPDBG(SCTP_DEBUG_INPUT2,
3173 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3174 SCTP_TCB_UNLOCK(stcb);
3177 /* notify upper layer protocol */
3178 if (stcb->sctp_socket) {
3179 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3182 if (!TAILQ_EMPTY(&asoc->send_queue) ||
3183 !TAILQ_EMPTY(&asoc->sent_queue) ||
3184 !stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
3185 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3188 /* stop the timer */
3189 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
3190 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3192 SCTPDBG(SCTP_DEBUG_INPUT2,
3193 "sctp_handle_shutdown_complete: calls free-asoc\n");
3194 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3195 so = SCTP_INP_SO(stcb->sctp_ep);
3196 atomic_add_int(&stcb->asoc.refcnt, 1);
3197 SCTP_TCB_UNLOCK(stcb);
3198 SCTP_SOCKET_LOCK(so, 1);
3199 SCTP_TCB_LOCK(stcb);
3200 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3202 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
3203 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3204 SCTP_SOCKET_UNLOCK(so, 1);
3210 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3211 struct sctp_nets *net, uint8_t flg)
3213 switch (desc->chunk_type) {
3215 /* find the tsn to resend (possibly */
3218 struct sctp_tmit_chunk *tp1;
3220 tsn = ntohl(desc->tsn_ifany);
3221 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3222 if (tp1->rec.data.TSN_seq == tsn) {
3226 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, tsn)) {
3234 * Do it the other way , aka without paying
3235 * attention to queue seq order.
3237 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3238 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3239 if (tp1->rec.data.TSN_seq == tsn) {
3246 SCTP_STAT_INCR(sctps_pdrptsnnf);
3248 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3251 if (((flg & SCTP_BADCRC) == 0) &&
3252 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3255 if ((stcb->asoc.peers_rwnd == 0) &&
3256 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3257 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3260 if (stcb->asoc.peers_rwnd == 0 &&
3261 (flg & SCTP_FROM_MIDDLE_BOX)) {
3262 SCTP_STAT_INCR(sctps_pdrpdizrw);
3265 ddp = (uint8_t *) (mtod(tp1->data, caddr_t)+
3266 sizeof(struct sctp_data_chunk));
3270 for (iii = 0; iii < sizeof(desc->data_bytes);
3272 if (ddp[iii] != desc->data_bytes[iii]) {
3273 SCTP_STAT_INCR(sctps_pdrpbadd);
3281 * this guy had a RTO calculation
3282 * pending on it, cancel it
3284 if (tp1->whoTo->rto_needed == 0) {
3285 tp1->whoTo->rto_needed = 1;
3289 SCTP_STAT_INCR(sctps_pdrpmark);
3290 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3291 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3293 * mark it as if we were doing a FR, since
3294 * we will be getting gap ack reports behind
3295 * the info from the router.
3297 tp1->rec.data.doing_fast_retransmit = 1;
3299 * mark the tsn with what sequences can
3302 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3303 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3305 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq;
3308 /* restart the timer */
3309 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3310 stcb, tp1->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3311 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3314 /* fix counts and things */
3315 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3316 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3317 tp1->whoTo->flight_size,
3320 tp1->rec.data.TSN_seq);
3322 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3323 sctp_flight_size_decrease(tp1);
3324 sctp_total_flight_decrease(stcb, tp1);
3326 tp1->sent = SCTP_DATAGRAM_RESEND;
3332 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3333 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3336 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3338 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3341 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3342 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3343 audit, stcb->asoc.sent_queue_retran_cnt);
3344 #ifndef SCTP_AUDITING_ENABLED
3345 stcb->asoc.sent_queue_retran_cnt = audit;
3353 struct sctp_tmit_chunk *asconf;
3355 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3357 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3362 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3363 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3364 asconf->sent = SCTP_DATAGRAM_RESEND;
3365 asconf->snd_count--;
3369 case SCTP_INITIATION:
3370 /* resend the INIT */
3371 stcb->asoc.dropped_special_cnt++;
3372 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3374 * If we can get it in, in a few attempts we do
3375 * this, otherwise we let the timer fire.
3377 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3378 stcb, net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3379 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3382 case SCTP_SELECTIVE_ACK:
3383 case SCTP_NR_SELECTIVE_ACK:
3384 /* resend the sack */
3385 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3387 case SCTP_HEARTBEAT_REQUEST:
3388 /* resend a demand HB */
3389 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3391 * Only retransmit if we KNOW we wont destroy the
3394 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3398 sctp_send_shutdown(stcb, net);
3400 case SCTP_SHUTDOWN_ACK:
3401 sctp_send_shutdown_ack(stcb, net);
3403 case SCTP_COOKIE_ECHO:
3405 struct sctp_tmit_chunk *cookie;
3408 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3410 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3415 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3416 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3417 cookie->sent = SCTP_DATAGRAM_RESEND;
3418 sctp_stop_all_cookie_timers(stcb);
3422 case SCTP_COOKIE_ACK:
3423 sctp_send_cookie_ack(stcb);
3425 case SCTP_ASCONF_ACK:
3426 /* resend last asconf ack */
3427 sctp_send_asconf_ack(stcb);
3429 case SCTP_FORWARD_CUM_TSN:
3430 send_forward_tsn(stcb, &stcb->asoc);
3432 /* can't do anything with these */
3433 case SCTP_PACKET_DROPPED:
3434 case SCTP_INITIATION_ACK: /* this should not happen */
3435 case SCTP_HEARTBEAT_ACK:
3436 case SCTP_ABORT_ASSOCIATION:
3437 case SCTP_OPERATION_ERROR:
3438 case SCTP_SHUTDOWN_COMPLETE:
3448 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t * list)
3454 * We set things to 0xffff since this is the last delivered sequence
3455 * and we will be sending in 0 after the reset.
3458 if (number_entries) {
3459 for (i = 0; i < number_entries; i++) {
3460 temp = ntohs(list[i]);
3461 if (temp >= stcb->asoc.streamincnt) {
3464 stcb->asoc.strmin[temp].last_sequence_delivered = 0xffff;
3468 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3469 stcb->asoc.strmin[i].last_sequence_delivered = 0xffff;
3472 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3476 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t * list)
3481 if (number_entries > 0) {
3482 for (i = 0; i < number_entries; i++) {
3483 temp = ntohs(list[i]);
3484 if (temp >= stcb->asoc.streamoutcnt) {
3485 /* no such stream */
3488 stcb->asoc.strmout[temp].next_sequence_send = 0;
3491 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3492 stcb->asoc.strmout[i].next_sequence_send = 0;
3495 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3499 struct sctp_stream_reset_request *
3500 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3502 struct sctp_association *asoc;
3503 struct sctp_chunkhdr *ch;
3504 struct sctp_stream_reset_request *r;
3505 struct sctp_tmit_chunk *chk;
3509 if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
3510 asoc->stream_reset_outstanding = 0;
3513 if (stcb->asoc.str_reset == NULL) {
3514 asoc->stream_reset_outstanding = 0;
3517 chk = stcb->asoc.str_reset;
3518 if (chk->data == NULL) {
3522 /* he wants a copy of the chk pointer */
3525 clen = chk->send_size;
3526 ch = mtod(chk->data, struct sctp_chunkhdr *);
3527 r = (struct sctp_stream_reset_request *)(ch + 1);
3528 if (ntohl(r->request_seq) == seq) {
3532 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3533 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3534 /* move to the next one, there can only be a max of two */
3535 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3536 if (ntohl(r->request_seq) == seq) {
3540 /* that seq is not here */
3545 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3547 struct sctp_association *asoc;
3548 struct sctp_tmit_chunk *chk = stcb->asoc.str_reset;
3550 if (stcb->asoc.str_reset == NULL) {
3555 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3556 TAILQ_REMOVE(&asoc->control_send_queue,
3560 sctp_m_freem(chk->data);
3563 asoc->ctrl_queue_cnt--;
3564 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3565 /* sa_ignore NO_NULL_CHK */
3566 stcb->asoc.str_reset = NULL;
3571 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3572 uint32_t seq, uint32_t action,
3573 struct sctp_stream_reset_response *respin)
3577 struct sctp_association *asoc = &stcb->asoc;
3578 struct sctp_tmit_chunk *chk;
3579 struct sctp_stream_reset_request *req_param;
3580 struct sctp_stream_reset_out_request *req_out_param;
3581 struct sctp_stream_reset_in_request *req_in_param;
3582 uint32_t number_entries;
3584 if (asoc->stream_reset_outstanding == 0) {
3588 if (seq == stcb->asoc.str_reset_seq_out) {
3589 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3590 if (req_param != NULL) {
3591 stcb->asoc.str_reset_seq_out++;
3592 type = ntohs(req_param->ph.param_type);
3593 lparm_len = ntohs(req_param->ph.param_length);
3594 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3595 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3596 number_entries = (lparm_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3597 asoc->stream_reset_out_is_outstanding = 0;
3598 if (asoc->stream_reset_outstanding)
3599 asoc->stream_reset_outstanding--;
3600 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3602 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3603 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3604 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3606 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3608 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3609 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3610 number_entries = (lparm_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3611 if (asoc->stream_reset_outstanding)
3612 asoc->stream_reset_outstanding--;
3613 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3614 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3615 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3616 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3617 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3618 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3620 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3621 /* Ok we now may have more streams */
3624 num_stream = stcb->asoc.strm_pending_add_size;
3625 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3627 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3629 stcb->asoc.strm_pending_add_size = 0;
3630 if (asoc->stream_reset_outstanding)
3631 asoc->stream_reset_outstanding--;
3632 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3633 /* Put the new streams into effect */
3634 stcb->asoc.streamoutcnt += num_stream;
3635 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3636 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3637 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3638 SCTP_STREAM_CHANGE_DENIED);
3640 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3641 SCTP_STREAM_CHANGE_FAILED);
3643 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3644 if (asoc->stream_reset_outstanding)
3645 asoc->stream_reset_outstanding--;
3646 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3647 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3648 SCTP_STREAM_CHANGE_DENIED);
3649 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3650 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3651 SCTP_STREAM_CHANGE_FAILED);
3653 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3655 * a) Adopt the new in tsn.
3657 * c) Adopt the new out-tsn
3659 struct sctp_stream_reset_response_tsn *resp;
3660 struct sctp_forward_tsn_chunk fwdtsn;
3663 if (respin == NULL) {
3667 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3668 resp = (struct sctp_stream_reset_response_tsn *)respin;
3669 asoc->stream_reset_outstanding--;
3670 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3671 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3672 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3673 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3677 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3678 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3679 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3681 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3682 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3683 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3685 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3686 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3688 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3689 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3691 sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL);
3692 sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL);
3693 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3694 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3695 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3696 SCTP_ASSOC_RESET_DENIED);
3698 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3699 SCTP_ASSOC_RESET_FAILED);
3702 /* get rid of the request and get the request flags */
3703 if (asoc->stream_reset_outstanding == 0) {
3704 sctp_clean_up_stream_reset(stcb);
3712 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3713 struct sctp_tmit_chunk *chk,
3714 struct sctp_stream_reset_in_request *req, int trunc)
3722 * peer wants me to send a str-reset to him for my outgoing seq's if
3725 struct sctp_association *asoc = &stcb->asoc;
3727 seq = ntohl(req->request_seq);
3728 if (asoc->str_reset_seq_in == seq) {
3729 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3730 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3731 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3733 /* Can't do it, since they exceeded our buffer size */
3734 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3735 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3736 len = ntohs(req->ph.param_length);
3737 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3738 for (i = 0; i < number_entries; i++) {
3739 temp = ntohs(req->list_of_streams[i]);
3740 req->list_of_streams[i] = temp;
3742 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3743 sctp_add_stream_reset_out(chk, number_entries, req->list_of_streams,
3744 asoc->str_reset_seq_out,
3745 seq, (asoc->sending_seq - 1));
3746 asoc->stream_reset_out_is_outstanding = 1;
3747 asoc->str_reset = chk;
3748 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
3749 stcb->asoc.stream_reset_outstanding++;
3751 /* Can't do it, since we have sent one out */
3752 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3754 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3755 asoc->str_reset_seq_in++;
3756 } else if (asoc->str_reset_seq_in - 1 == seq) {
3757 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3758 } else if (asoc->str_reset_seq_in - 2 == seq) {
3759 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3761 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3766 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3767 struct sctp_tmit_chunk *chk,
3768 struct sctp_stream_reset_tsn_request *req)
3770 /* reset all in and out and update the tsn */
3772 * A) reset my str-seq's on in and out. B) Select a receive next,
3773 * and set cum-ack to it. Also process this selected number as a
3774 * fwd-tsn as well. C) set in the response my next sending seq.
3776 struct sctp_forward_tsn_chunk fwdtsn;
3777 struct sctp_association *asoc = &stcb->asoc;
3781 seq = ntohl(req->request_seq);
3782 if (asoc->str_reset_seq_in == seq) {
3783 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3784 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3785 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3787 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3788 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3789 fwdtsn.ch.chunk_flags = 0;
3790 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3791 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3795 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3796 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3797 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3799 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3800 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3801 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3802 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3803 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3804 atomic_add_int(&asoc->sending_seq, 1);
3805 /* save off historical data for retrans */
3806 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3807 asoc->last_sending_seq[0] = asoc->sending_seq;
3808 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3809 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3810 sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL);
3811 sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL);
3812 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3813 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3815 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3816 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3817 asoc->str_reset_seq_in++;
3818 } else if (asoc->str_reset_seq_in - 1 == seq) {
3819 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3820 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3821 } else if (asoc->str_reset_seq_in - 2 == seq) {
3822 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3823 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3825 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3831 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3832 struct sctp_tmit_chunk *chk,
3833 struct sctp_stream_reset_out_request *req, int trunc)
3836 int number_entries, len;
3837 struct sctp_association *asoc = &stcb->asoc;
3839 seq = ntohl(req->request_seq);
3841 /* now if its not a duplicate we process it */
3842 if (asoc->str_reset_seq_in == seq) {
3843 len = ntohs(req->ph.param_length);
3844 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3846 * the sender is resetting, handle the list issue.. we must
3847 * a) verify if we can do the reset, if so no problem b) If
3848 * we can't do the reset we must copy the request. c) queue
3849 * it, and setup the data in processor to trigger it off
3850 * when needed and dequeue all the queued data.
3852 tsn = ntohl(req->send_reset_at_tsn);
3854 /* move the reset action back one */
3855 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3856 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3857 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3859 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3860 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
3861 /* we can do it now */
3862 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
3863 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3866 * we must queue it up and thus wait for the TSN's
3867 * to arrive that are at or before tsn
3869 struct sctp_stream_reset_list *liste;
3872 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
3873 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
3874 siz, SCTP_M_STRESET);
3875 if (liste == NULL) {
3876 /* gak out of memory */
3877 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3878 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3882 liste->number_entries = number_entries;
3883 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
3884 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
3885 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3887 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3888 asoc->str_reset_seq_in++;
3889 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3891 * one seq back, just echo back last action since my
3892 * response was lost.
3894 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3895 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3897 * two seq back, just echo back last action since my
3898 * response was lost.
3900 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3902 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3907 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3908 struct sctp_stream_reset_add_strm *str_add)
3911 * Peer is requesting to add more streams. If its within our
3912 * max-streams we will allow it.
3914 uint32_t num_stream, i;
3916 struct sctp_association *asoc = &stcb->asoc;
3917 struct sctp_queued_to_read *ctl, *nctl;
3919 /* Get the number. */
3920 seq = ntohl(str_add->request_seq);
3921 num_stream = ntohs(str_add->number_of_streams);
3922 /* Now what would be the new total? */
3923 if (asoc->str_reset_seq_in == seq) {
3924 num_stream += stcb->asoc.streamincnt;
3925 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3926 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3927 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3928 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
3929 (num_stream > 0xffff)) {
3930 /* We must reject it they ask for to many */
3932 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3934 /* Ok, we can do that :-) */
3935 struct sctp_stream_in *oldstrm;
3937 /* save off the old */
3938 oldstrm = stcb->asoc.strmin;
3939 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
3940 (num_stream * sizeof(struct sctp_stream_in)),
3942 if (stcb->asoc.strmin == NULL) {
3943 stcb->asoc.strmin = oldstrm;
3946 /* copy off the old data */
3947 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3948 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3949 stcb->asoc.strmin[i].stream_no = i;
3950 stcb->asoc.strmin[i].last_sequence_delivered = oldstrm[i].last_sequence_delivered;
3951 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
3952 /* now anything on those queues? */
3953 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next, nctl) {
3954 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next);
3955 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next);
3958 /* Init the new streams */
3959 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
3960 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3961 stcb->asoc.strmin[i].stream_no = i;
3962 stcb->asoc.strmin[i].last_sequence_delivered = 0xffff;
3963 stcb->asoc.strmin[i].delivery_started = 0;
3965 SCTP_FREE(oldstrm, SCTP_M_STRMI);
3966 /* update the size */
3967 stcb->asoc.streamincnt = num_stream;
3968 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3969 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3971 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3972 asoc->str_reset_seq_in++;
3973 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3975 * one seq back, just echo back last action since my
3976 * response was lost.
3978 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3979 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3981 * two seq back, just echo back last action since my
3982 * response was lost.
3984 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3986 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3992 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3993 struct sctp_stream_reset_add_strm *str_add)
3996 * Peer is requesting to add more streams. If its within our
3997 * max-streams we will allow it.
3999 uint16_t num_stream;
4001 struct sctp_association *asoc = &stcb->asoc;
4003 /* Get the number. */
4004 seq = ntohl(str_add->request_seq);
4005 num_stream = ntohs(str_add->number_of_streams);
4006 /* Now what would be the new total? */
4007 if (asoc->str_reset_seq_in == seq) {
4008 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4009 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4010 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4011 } else if (stcb->asoc.stream_reset_outstanding) {
4012 /* We must reject it we have something pending */
4013 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
4015 /* Ok, we can do that :-) */
4018 mychk = stcb->asoc.streamoutcnt;
4019 mychk += num_stream;
4020 if (mychk < 0x10000) {
4021 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4022 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 0, 1, num_stream, 0, 1)) {
4023 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4026 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4029 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
4030 asoc->str_reset_seq_in++;
4031 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4033 * one seq back, just echo back last action since my
4034 * response was lost.
4036 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4037 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4039 * two seq back, just echo back last action since my
4040 * response was lost.
4042 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4044 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4049 __attribute__((noinline))
4052 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
4053 struct sctp_chunkhdr *ch_req)
4055 int chk_length, param_len, ptype;
4056 struct sctp_paramhdr pstore;
4057 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
4061 struct sctp_tmit_chunk *chk;
4062 struct sctp_chunkhdr *ch;
4063 struct sctp_paramhdr *ph;
4067 /* now it may be a reset or a reset-response */
4068 chk_length = ntohs(ch_req->chunk_length);
4070 /* setup for adding the response */
4071 sctp_alloc_a_chunk(stcb, chk);
4075 chk->copy_by_ref = 0;
4076 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
4077 chk->rec.chunk_id.can_take_data = 0;
4079 chk->asoc = &stcb->asoc;
4080 chk->no_fr_allowed = 0;
4081 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
4082 chk->book_size_scale = 0;
4083 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
4084 if (chk->data == NULL) {
4087 sctp_m_freem(chk->data);
4090 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
4093 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
4095 /* setup chunk parameters */
4096 chk->sent = SCTP_DATAGRAM_UNSENT;
4100 ch = mtod(chk->data, struct sctp_chunkhdr *);
4101 ch->chunk_type = SCTP_STREAM_RESET;
4102 ch->chunk_flags = 0;
4103 ch->chunk_length = htons(chk->send_size);
4104 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4105 offset += sizeof(struct sctp_chunkhdr);
4106 while ((size_t)chk_length >= sizeof(struct sctp_stream_reset_tsn_request)) {
4107 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *) & pstore);
4110 param_len = ntohs(ph->param_length);
4111 if (param_len < (int)sizeof(struct sctp_stream_reset_tsn_request)) {
4115 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, (int)sizeof(cstore)),
4116 (uint8_t *) & cstore);
4117 ptype = ntohs(ph->param_type);
4119 if (param_len > (int)sizeof(cstore)) {
4124 if (num_param > SCTP_MAX_RESET_PARAMS) {
4125 /* hit the max of parameters already sorry.. */
4128 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4129 struct sctp_stream_reset_out_request *req_out;
4131 req_out = (struct sctp_stream_reset_out_request *)ph;
4133 if (stcb->asoc.stream_reset_outstanding) {
4134 seq = ntohl(req_out->response_seq);
4135 if (seq == stcb->asoc.str_reset_seq_out) {
4137 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4140 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4141 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4142 struct sctp_stream_reset_add_strm *str_add;
4144 str_add = (struct sctp_stream_reset_add_strm *)ph;
4146 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4147 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4148 struct sctp_stream_reset_add_strm *str_add;
4150 str_add = (struct sctp_stream_reset_add_strm *)ph;
4152 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4153 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4154 struct sctp_stream_reset_in_request *req_in;
4157 req_in = (struct sctp_stream_reset_in_request *)ph;
4158 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4159 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4160 struct sctp_stream_reset_tsn_request *req_tsn;
4163 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4164 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4166 goto strres_nochunk;
4170 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4171 struct sctp_stream_reset_response *resp;
4174 resp = (struct sctp_stream_reset_response *)ph;
4175 seq = ntohl(resp->response_seq);
4176 result = ntohl(resp->result);
4177 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4179 goto strres_nochunk;
4184 offset += SCTP_SIZE32(param_len);
4185 chk_length -= SCTP_SIZE32(param_len);
4188 /* we have no response free the stuff */
4189 goto strres_nochunk;
4191 /* ok we have a chunk to link in */
4192 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4195 stcb->asoc.ctrl_queue_cnt++;
4200 * Handle a router or endpoints report of a packet loss, there are two ways
4201 * to handle this, either we get the whole packet and must disect it
4202 * ourselves (possibly with truncation and or corruption) or it is a summary
4203 * from a middle box that did the disectting for us.
4206 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4207 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4209 uint32_t bottle_bw, on_queue;
4213 struct sctp_chunk_desc desc;
4214 struct sctp_chunkhdr *ch;
4216 chlen = ntohs(cp->ch.chunk_length);
4217 chlen -= sizeof(struct sctp_pktdrop_chunk);
4218 /* XXX possible chlen underflow */
4221 if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)
4222 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4224 ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr));
4225 chlen -= sizeof(struct sctphdr);
4226 /* XXX possible chlen underflow */
4227 memset(&desc, 0, sizeof(desc));
4229 trunc_len = (uint16_t) ntohs(cp->trunc_len);
4230 if (trunc_len > limit) {
4233 /* now the chunks themselves */
4234 while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) {
4235 desc.chunk_type = ch->chunk_type;
4236 /* get amount we need to move */
4237 at = ntohs(ch->chunk_length);
4238 if (at < sizeof(struct sctp_chunkhdr)) {
4239 /* corrupt chunk, maybe at the end? */
4240 SCTP_STAT_INCR(sctps_pdrpcrupt);
4243 if (trunc_len == 0) {
4244 /* we are supposed to have all of it */
4246 /* corrupt skip it */
4247 SCTP_STAT_INCR(sctps_pdrpcrupt);
4251 /* is there enough of it left ? */
4252 if (desc.chunk_type == SCTP_DATA) {
4253 if (chlen < (sizeof(struct sctp_data_chunk) +
4254 sizeof(desc.data_bytes))) {
4258 if (chlen < sizeof(struct sctp_chunkhdr)) {
4263 if (desc.chunk_type == SCTP_DATA) {
4264 /* can we get out the tsn? */
4265 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4266 SCTP_STAT_INCR(sctps_pdrpmbda);
4268 if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) {
4270 struct sctp_data_chunk *dcp;
4274 dcp = (struct sctp_data_chunk *)ch;
4275 ddp = (uint8_t *) (dcp + 1);
4276 for (iii = 0; iii < sizeof(desc.data_bytes); iii++) {
4277 desc.data_bytes[iii] = ddp[iii];
4279 desc.tsn_ifany = dcp->dp.tsn;
4281 /* nope we are done. */
4282 SCTP_STAT_INCR(sctps_pdrpnedat);
4286 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4287 SCTP_STAT_INCR(sctps_pdrpmbct);
4290 if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) {
4291 SCTP_STAT_INCR(sctps_pdrppdbrk);
4294 if (SCTP_SIZE32(at) > chlen) {
4297 chlen -= SCTP_SIZE32(at);
4298 if (chlen < sizeof(struct sctp_chunkhdr)) {
4299 /* done, none left */
4302 ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at));
4304 /* Now update any rwnd --- possibly */
4305 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4306 /* From a peer, we get a rwnd report */
4309 SCTP_STAT_INCR(sctps_pdrpfehos);
4311 bottle_bw = ntohl(cp->bottle_bw);
4312 on_queue = ntohl(cp->current_onq);
4313 if (bottle_bw && on_queue) {
4314 /* a rwnd report is in here */
4315 if (bottle_bw > on_queue)
4316 a_rwnd = bottle_bw - on_queue;
4321 stcb->asoc.peers_rwnd = 0;
4323 if (a_rwnd > stcb->asoc.total_flight) {
4324 stcb->asoc.peers_rwnd =
4325 a_rwnd - stcb->asoc.total_flight;
4327 stcb->asoc.peers_rwnd = 0;
4329 if (stcb->asoc.peers_rwnd <
4330 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4331 /* SWS sender side engages */
4332 stcb->asoc.peers_rwnd = 0;
4337 SCTP_STAT_INCR(sctps_pdrpfmbox);
4340 /* now middle boxes in sat networks get a cwnd bump */
4341 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) &&
4342 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4343 (stcb->asoc.sat_network)) {
4345 * This is debateable but for sat networks it makes sense
4346 * Note if a T3 timer has went off, we will prohibit any
4347 * changes to cwnd until we exit the t3 loss recovery.
4349 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4350 net, cp, &bottle_bw, &on_queue);
4355 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4356 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4357 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4358 * length of the complete packet outputs: - length: modified to remaining
4359 * length after control processing - netp: modified to new sctp_nets after
4360 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4361 * bad packet,...) otherwise return the tcb for this packet
4364 __attribute__((noinline))
4366 static struct sctp_tcb *
4367 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4368 struct sockaddr *src, struct sockaddr *dst,
4369 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4370 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4371 uint8_t use_mflowid, uint32_t mflowid,
4372 uint32_t vrf_id, uint16_t port)
4374 struct sctp_association *asoc;
4375 struct mbuf *op_err;
4376 char msg[SCTP_DIAG_INFO_LEN];
4378 int num_chunks = 0; /* number of control chunks processed */
4379 uint32_t chk_length;
4381 int abort_no_unlock = 0;
4385 * How big should this be, and should it be alloc'd? Lets try the
4386 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4387 * until we get into jumbo grams and such..
4389 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4390 struct sctp_tcb *locked_tcb = stcb;
4392 uint32_t auth_offset = 0, auth_len = 0;
4393 int auth_skipped = 0;
4396 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4401 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4402 iphlen, *offset, length, (void *)stcb);
4404 /* validate chunk header length... */
4405 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4406 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4407 ntohs(ch->chunk_length));
4409 SCTP_TCB_UNLOCK(locked_tcb);
4414 * validate the verification tag
4416 vtag_in = ntohl(sh->v_tag);
4419 SCTP_TCB_LOCK_ASSERT(locked_tcb);
4421 if (ch->chunk_type == SCTP_INITIATION) {
4422 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4423 ntohs(ch->chunk_length), vtag_in);
4425 /* protocol error- silently discard... */
4426 SCTP_STAT_INCR(sctps_badvtag);
4428 SCTP_TCB_UNLOCK(locked_tcb);
4432 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4434 * If there is no stcb, skip the AUTH chunk and process
4435 * later after a stcb is found (to validate the lookup was
4438 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4440 (inp->auth_supported == 1)) {
4441 /* save this chunk for later processing */
4443 auth_offset = *offset;
4444 auth_len = ntohs(ch->chunk_length);
4446 /* (temporarily) move past this chunk */
4447 *offset += SCTP_SIZE32(auth_len);
4448 if (*offset >= length) {
4449 /* no more data left in the mbuf chain */
4452 SCTP_TCB_UNLOCK(locked_tcb);
4456 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4457 sizeof(struct sctp_chunkhdr), chunk_buf);
4463 SCTP_TCB_UNLOCK(locked_tcb);
4467 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4468 goto process_control_chunks;
4471 * first check if it's an ASCONF with an unknown src addr we
4472 * need to look inside to find the association
4474 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4475 struct sctp_chunkhdr *asconf_ch = ch;
4476 uint32_t asconf_offset = 0, asconf_len = 0;
4478 /* inp's refcount may be reduced */
4479 SCTP_INP_INCR_REF(inp);
4481 asconf_offset = *offset;
4483 asconf_len = ntohs(asconf_ch->chunk_length);
4484 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4486 stcb = sctp_findassociation_ep_asconf(m,
4489 sh, &inp, netp, vrf_id);
4492 asconf_offset += SCTP_SIZE32(asconf_len);
4493 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4494 sizeof(struct sctp_chunkhdr), chunk_buf);
4495 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4498 * reduce inp's refcount if not reduced in
4499 * sctp_findassociation_ep_asconf().
4501 SCTP_INP_DECR_REF(inp);
4506 /* now go back and verify any auth chunk to be sure */
4507 if (auth_skipped && (stcb != NULL)) {
4508 struct sctp_auth_chunk *auth;
4510 auth = (struct sctp_auth_chunk *)
4511 sctp_m_getptr(m, auth_offset,
4512 auth_len, chunk_buf);
4515 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4517 /* auth HMAC failed so dump it */
4520 SCTP_TCB_UNLOCK(locked_tcb);
4524 /* remaining chunks are HMAC checked */
4525 stcb->asoc.authenticated = 1;
4530 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__);
4531 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4533 /* no association, so it's out of the blue... */
4534 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4535 use_mflowid, mflowid,
4539 SCTP_TCB_UNLOCK(locked_tcb);
4544 /* ABORT and SHUTDOWN can use either v_tag... */
4545 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4546 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4547 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4548 /* Take the T-bit always into account. */
4549 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4550 (vtag_in == asoc->my_vtag)) ||
4551 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4552 (vtag_in == asoc->peer_vtag))) {
4555 /* drop this packet... */
4556 SCTP_STAT_INCR(sctps_badvtag);
4558 SCTP_TCB_UNLOCK(locked_tcb);
4562 } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
4563 if (vtag_in != asoc->my_vtag) {
4565 * this could be a stale SHUTDOWN-ACK or the
4566 * peer never got the SHUTDOWN-COMPLETE and
4567 * is still hung; we have started a new asoc
4568 * but it won't complete until the shutdown
4572 SCTP_TCB_UNLOCK(locked_tcb);
4574 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__);
4575 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4577 sctp_handle_ootb(m, iphlen, *offset, src, dst,
4579 use_mflowid, mflowid,
4584 /* for all other chunks, vtag must match */
4585 if (vtag_in != asoc->my_vtag) {
4586 /* invalid vtag... */
4587 SCTPDBG(SCTP_DEBUG_INPUT3,
4588 "invalid vtag: %xh, expect %xh\n",
4589 vtag_in, asoc->my_vtag);
4590 SCTP_STAT_INCR(sctps_badvtag);
4592 SCTP_TCB_UNLOCK(locked_tcb);
4598 } /* end if !SCTP_COOKIE_ECHO */
4600 * process all control chunks...
4602 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4603 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4604 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4605 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
4606 /* implied cookie-ack.. we must have lost the ack */
4607 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
4608 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
4609 stcb->asoc.overall_error_count,
4611 SCTP_FROM_SCTP_INPUT,
4614 stcb->asoc.overall_error_count = 0;
4615 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4618 process_control_chunks:
4619 while (IS_SCTP_CONTROL(ch)) {
4620 /* validate chunk length */
4621 chk_length = ntohs(ch->chunk_length);
4622 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4623 ch->chunk_type, chk_length);
4624 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4625 if (chk_length < sizeof(*ch) ||
4626 (*offset + (int)chk_length) > length) {
4629 SCTP_TCB_UNLOCK(locked_tcb);
4633 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4635 * INIT-ACK only gets the init ack "header" portion only
4636 * because we don't have to process the peer's COOKIE. All
4637 * others get a complete chunk.
4639 if ((ch->chunk_type == SCTP_INITIATION_ACK) ||
4640 (ch->chunk_type == SCTP_INITIATION)) {
4641 /* get an init-ack chunk */
4642 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4643 sizeof(struct sctp_init_ack_chunk), chunk_buf);
4647 SCTP_TCB_UNLOCK(locked_tcb);
4652 /* For cookies and all other chunks. */
4653 if (chk_length > sizeof(chunk_buf)) {
4655 * use just the size of the chunk buffer so
4656 * the front part of our chunks fit in
4657 * contiguous space up to the chunk buffer
4658 * size (508 bytes). For chunks that need to
4659 * get more than that they must use the
4660 * sctp_m_getptr() function or other means
4661 * (e.g. know how to parse mbuf chains).
4662 * Cookies do this already.
4664 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4665 (sizeof(chunk_buf) - 4),
4670 SCTP_TCB_UNLOCK(locked_tcb);
4675 /* We can fit it all */
4676 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4677 chk_length, chunk_buf);
4679 SCTP_PRINTF("sctp_process_control: Can't get the all data....\n");
4682 SCTP_TCB_UNLOCK(locked_tcb);
4689 /* Save off the last place we got a control from */
4691 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4693 * allow last_control to be NULL if
4694 * ASCONF... ASCONF processing will find the
4697 if ((netp != NULL) && (*netp != NULL))
4698 stcb->asoc.last_control_chunk_from = *netp;
4701 #ifdef SCTP_AUDITING_ENABLED
4702 sctp_audit_log(0xB0, ch->chunk_type);
4705 /* check to see if this chunk required auth, but isn't */
4706 if ((stcb != NULL) &&
4707 (stcb->asoc.auth_supported == 1) &&
4708 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4709 !stcb->asoc.authenticated) {
4710 /* "silently" ignore */
4711 SCTP_STAT_INCR(sctps_recvauthmissing);
4714 switch (ch->chunk_type) {
4715 case SCTP_INITIATION:
4716 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4717 /* The INIT chunk must be the only chunk. */
4718 if ((num_chunks > 1) ||
4719 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4720 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4721 "INIT not the only chunk");
4722 sctp_abort_association(inp, stcb, m, iphlen,
4723 src, dst, sh, op_err,
4724 use_mflowid, mflowid,
4729 /* Honor our resource limit. */
4730 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4731 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4732 sctp_abort_association(inp, stcb, m, iphlen,
4733 src, dst, sh, op_err,
4734 use_mflowid, mflowid,
4739 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4740 (struct sctp_init_chunk *)ch, inp,
4741 stcb, &abort_no_unlock,
4742 use_mflowid, mflowid,
4745 if ((!abort_no_unlock) && (locked_tcb)) {
4746 SCTP_TCB_UNLOCK(locked_tcb);
4750 case SCTP_PAD_CHUNK:
4752 case SCTP_INITIATION_ACK:
4753 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT-ACK\n");
4754 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4755 /* We are not interested anymore */
4756 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
4759 if (locked_tcb != stcb) {
4761 SCTP_TCB_UNLOCK(locked_tcb);
4765 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4766 so = SCTP_INP_SO(inp);
4767 atomic_add_int(&stcb->asoc.refcnt, 1);
4768 SCTP_TCB_UNLOCK(stcb);
4769 SCTP_SOCKET_LOCK(so, 1);
4770 SCTP_TCB_LOCK(stcb);
4771 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4773 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
4774 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4775 SCTP_SOCKET_UNLOCK(so, 1);
4781 /* The INIT-ACK chunk must be the only chunk. */
4782 if ((num_chunks > 1) ||
4783 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4786 SCTP_TCB_UNLOCK(locked_tcb);
4790 if ((netp) && (*netp)) {
4791 ret = sctp_handle_init_ack(m, iphlen, *offset,
4793 (struct sctp_init_ack_chunk *)ch,
4796 use_mflowid, mflowid,
4802 if (abort_no_unlock) {
4806 * Special case, I must call the output routine to
4807 * get the cookie echoed
4809 if ((stcb != NULL) && (ret == 0)) {
4810 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4813 SCTP_TCB_UNLOCK(locked_tcb);
4817 case SCTP_SELECTIVE_ACK:
4819 struct sctp_sack_chunk *sack;
4821 uint32_t a_rwnd, cum_ack;
4822 uint16_t num_seg, num_dup;
4824 int offset_seg, offset_dup;
4826 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SACK\n");
4827 SCTP_STAT_INCR(sctps_recvsacks);
4829 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing SACK chunk\n");
4832 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4833 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4836 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4838 * If we have sent a shutdown-ack, we will pay no
4839 * attention to a sack sent in to us since
4840 * we don't care anymore.
4844 sack = (struct sctp_sack_chunk *)ch;
4845 flags = ch->chunk_flags;
4846 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4847 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4848 num_dup = ntohs(sack->sack.num_dup_tsns);
4849 a_rwnd = (uint32_t) ntohl(sack->sack.a_rwnd);
4850 if (sizeof(struct sctp_sack_chunk) +
4851 num_seg * sizeof(struct sctp_gap_ack_block) +
4852 num_dup * sizeof(uint32_t) != chk_length) {
4853 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4856 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4857 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4858 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SACK process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4859 cum_ack, num_seg, a_rwnd);
4860 stcb->asoc.seen_a_sack_this_pkt = 1;
4861 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4863 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4864 (stcb->asoc.saw_sack_with_frags == 0) &&
4865 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4866 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))
4869 * We have a SIMPLE sack having no
4870 * prior segments and data on sent
4871 * queue to be acked.. Use the
4872 * faster path sack processing. We
4873 * also allow window update sacks
4874 * with no missing segments to go
4877 sctp_express_handle_sack(stcb, cum_ack, a_rwnd, &abort_now, ecne_seen);
4880 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
4881 num_seg, 0, num_dup, &abort_now, flags,
4882 cum_ack, a_rwnd, ecne_seen);
4885 /* ABORT signal from sack processing */
4889 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
4890 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
4891 (stcb->asoc.stream_queue_cnt == 0)) {
4892 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
4897 * EY - nr_sack: If the received chunk is an
4900 case SCTP_NR_SELECTIVE_ACK:
4902 struct sctp_nr_sack_chunk *nr_sack;
4904 uint32_t a_rwnd, cum_ack;
4905 uint16_t num_seg, num_nr_seg, num_dup;
4907 int offset_seg, offset_dup;
4909 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_NR_SACK\n");
4910 SCTP_STAT_INCR(sctps_recvsacks);
4912 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing NR-SACK chunk\n");
4915 if (stcb->asoc.nrsack_supported == 0) {
4918 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4919 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR-SACK chunk, too small\n");
4922 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4924 * If we have sent a shutdown-ack, we will pay no
4925 * attention to a sack sent in to us since
4926 * we don't care anymore.
4930 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4931 flags = ch->chunk_flags;
4932 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4933 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4934 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4935 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4936 a_rwnd = (uint32_t) ntohl(nr_sack->nr_sack.a_rwnd);
4937 if (sizeof(struct sctp_nr_sack_chunk) +
4938 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4939 num_dup * sizeof(uint32_t) != chk_length) {
4940 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
4943 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
4944 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4945 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_NR_SACK process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4946 cum_ack, num_seg, a_rwnd);
4947 stcb->asoc.seen_a_sack_this_pkt = 1;
4948 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4949 (num_seg == 0) && (num_nr_seg == 0) &&
4950 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4951 (stcb->asoc.saw_sack_with_frags == 0) &&
4952 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4953 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
4955 * We have a SIMPLE sack having no
4956 * prior segments and data on sent
4957 * queue to be acked. Use the faster
4958 * path sack processing. We also
4959 * allow window update sacks with no
4960 * missing segments to go this way
4963 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
4964 &abort_now, ecne_seen);
4967 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
4968 num_seg, num_nr_seg, num_dup, &abort_now, flags,
4969 cum_ack, a_rwnd, ecne_seen);
4972 /* ABORT signal from sack processing */
4976 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
4977 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
4978 (stcb->asoc.stream_queue_cnt == 0)) {
4979 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
4984 case SCTP_HEARTBEAT_REQUEST:
4985 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
4986 if ((stcb) && netp && *netp) {
4987 SCTP_STAT_INCR(sctps_recvheartbeat);
4988 sctp_send_heartbeat_ack(stcb, m, *offset,
4991 /* He's alive so give him credit */
4992 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
4993 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
4994 stcb->asoc.overall_error_count,
4996 SCTP_FROM_SCTP_INPUT,
4999 stcb->asoc.overall_error_count = 0;
5002 case SCTP_HEARTBEAT_ACK:
5003 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT-ACK\n");
5004 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
5008 SCTP_TCB_UNLOCK(locked_tcb);
5012 /* He's alive so give him credit */
5013 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5014 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5015 stcb->asoc.overall_error_count,
5017 SCTP_FROM_SCTP_INPUT,
5020 stcb->asoc.overall_error_count = 0;
5021 SCTP_STAT_INCR(sctps_recvheartbeatack);
5023 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
5026 case SCTP_ABORT_ASSOCIATION:
5027 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
5029 if ((stcb) && netp && *netp)
5030 sctp_handle_abort((struct sctp_abort_chunk *)ch,
5036 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
5038 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
5041 SCTP_TCB_UNLOCK(locked_tcb);
5045 if (netp && *netp) {
5048 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
5049 stcb, *netp, &abort_flag);
5056 case SCTP_SHUTDOWN_ACK:
5057 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-ACK, stcb %p\n", (void *)stcb);
5058 if ((stcb) && (netp) && (*netp))
5059 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
5064 case SCTP_OPERATION_ERROR:
5065 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP-ERR\n");
5066 if ((stcb) && netp && *netp && sctp_handle_error(ch, stcb, *netp) < 0) {
5071 case SCTP_COOKIE_ECHO:
5072 SCTPDBG(SCTP_DEBUG_INPUT3,
5073 "SCTP_COOKIE-ECHO, stcb %p\n", (void *)stcb);
5074 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
5077 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5078 /* We are not interested anymore */
5081 SCTP_TCB_UNLOCK(stcb);
5088 * First are we accepting? We do this again here
5089 * since it is possible that a previous endpoint WAS
5090 * listening responded to a INIT-ACK and then
5091 * closed. We opened and bound.. and are now no
5095 if ((stcb == NULL) && (inp->sctp_socket->so_qlen >= inp->sctp_socket->so_qlimit)) {
5096 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
5097 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
5098 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
5099 sctp_abort_association(inp, stcb, m, iphlen,
5100 src, dst, sh, op_err,
5101 use_mflowid, mflowid,
5107 struct mbuf *ret_buf;
5108 struct sctp_inpcb *linp;
5117 SCTP_ASOC_CREATE_LOCK(linp);
5118 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
5119 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
5120 SCTP_ASOC_CREATE_UNLOCK(linp);
5126 sctp_handle_cookie_echo(m, iphlen,
5130 (struct sctp_cookie_echo_chunk *)ch,
5144 SCTP_ASOC_CREATE_UNLOCK(linp);
5146 if (ret_buf == NULL) {
5148 SCTP_TCB_UNLOCK(locked_tcb);
5150 SCTPDBG(SCTP_DEBUG_INPUT3,
5151 "GAK, null buffer\n");
5155 /* if AUTH skipped, see if it verified... */
5160 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
5162 * Restart the timer if we have
5165 struct sctp_tmit_chunk *chk;
5167 chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
5168 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
5172 case SCTP_COOKIE_ACK:
5173 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE-ACK, stcb %p\n", (void *)stcb);
5174 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
5176 SCTP_TCB_UNLOCK(locked_tcb);
5180 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5181 /* We are not interested anymore */
5182 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
5185 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5186 so = SCTP_INP_SO(inp);
5187 atomic_add_int(&stcb->asoc.refcnt, 1);
5188 SCTP_TCB_UNLOCK(stcb);
5189 SCTP_SOCKET_LOCK(so, 1);
5190 SCTP_TCB_LOCK(stcb);
5191 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5193 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
5194 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5195 SCTP_SOCKET_UNLOCK(so, 1);
5201 /* He's alive so give him credit */
5202 if ((stcb) && netp && *netp) {
5203 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5204 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5205 stcb->asoc.overall_error_count,
5207 SCTP_FROM_SCTP_INPUT,
5210 stcb->asoc.overall_error_count = 0;
5211 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
5215 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-ECHO\n");
5216 /* He's alive so give him credit */
5217 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_ecne_chunk))) {
5220 SCTP_TCB_UNLOCK(locked_tcb);
5226 if (stcb->asoc.ecn_supported == 0) {
5229 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5230 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5231 stcb->asoc.overall_error_count,
5233 SCTP_FROM_SCTP_INPUT,
5236 stcb->asoc.overall_error_count = 0;
5237 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch,
5243 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-CWR\n");
5244 /* He's alive so give him credit */
5245 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_cwr_chunk))) {
5248 SCTP_TCB_UNLOCK(locked_tcb);
5254 if (stcb->asoc.ecn_supported == 0) {
5257 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5258 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5259 stcb->asoc.overall_error_count,
5261 SCTP_FROM_SCTP_INPUT,
5264 stcb->asoc.overall_error_count = 0;
5265 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5268 case SCTP_SHUTDOWN_COMPLETE:
5269 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-COMPLETE, stcb %p\n", (void *)stcb);
5270 /* must be first and only chunk */
5271 if ((num_chunks > 1) ||
5272 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5275 SCTP_TCB_UNLOCK(locked_tcb);
5279 if ((stcb) && netp && *netp) {
5280 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5287 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5288 /* He's alive so give him credit */
5290 if (stcb->asoc.asconf_supported == 0) {
5293 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5294 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5295 stcb->asoc.overall_error_count,
5297 SCTP_FROM_SCTP_INPUT,
5300 stcb->asoc.overall_error_count = 0;
5301 sctp_handle_asconf(m, *offset, src,
5302 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5306 case SCTP_ASCONF_ACK:
5307 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF-ACK\n");
5308 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5311 SCTP_TCB_UNLOCK(locked_tcb);
5316 if ((stcb) && netp && *netp) {
5317 if (stcb->asoc.asconf_supported == 0) {
5320 /* He's alive so give him credit */
5321 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5322 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5323 stcb->asoc.overall_error_count,
5325 SCTP_FROM_SCTP_INPUT,
5328 stcb->asoc.overall_error_count = 0;
5329 sctp_handle_asconf_ack(m, *offset,
5330 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5331 if (abort_no_unlock)
5335 case SCTP_FORWARD_CUM_TSN:
5336 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_FWD-TSN\n");
5337 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5340 SCTP_TCB_UNLOCK(locked_tcb);
5345 /* He's alive so give him credit */
5349 if (stcb->asoc.prsctp_supported == 0) {
5352 stcb->asoc.overall_error_count = 0;
5353 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5354 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5355 stcb->asoc.overall_error_count,
5357 SCTP_FROM_SCTP_INPUT,
5361 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5362 /* We are not interested anymore */
5363 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5364 so = SCTP_INP_SO(inp);
5365 atomic_add_int(&stcb->asoc.refcnt, 1);
5366 SCTP_TCB_UNLOCK(stcb);
5367 SCTP_SOCKET_LOCK(so, 1);
5368 SCTP_TCB_LOCK(stcb);
5369 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5371 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
5372 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5373 SCTP_SOCKET_UNLOCK(so, 1);
5378 sctp_handle_forward_tsn(stcb,
5379 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5384 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5385 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5386 stcb->asoc.overall_error_count,
5388 SCTP_FROM_SCTP_INPUT,
5391 stcb->asoc.overall_error_count = 0;
5396 case SCTP_STREAM_RESET:
5397 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5398 if (((stcb == NULL) || (ch == NULL) || (chk_length < sizeof(struct sctp_stream_reset_tsn_req)))) {
5401 SCTP_TCB_UNLOCK(locked_tcb);
5406 if (stcb->asoc.reconfig_supported == 0) {
5409 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5410 /* stop processing */
5415 case SCTP_PACKET_DROPPED:
5416 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5417 /* re-get it all please */
5418 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5421 SCTP_TCB_UNLOCK(locked_tcb);
5426 if (ch && (stcb) && netp && (*netp)) {
5427 if (stcb->asoc.pktdrop_supported == 0) {
5430 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5432 min(chk_length, (sizeof(chunk_buf) - 4)));
5436 case SCTP_AUTHENTICATION:
5437 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5439 /* save the first AUTH for later processing */
5440 if (auth_skipped == 0) {
5441 auth_offset = *offset;
5442 auth_len = chk_length;
5445 /* skip this chunk (temporarily) */
5448 if (stcb->asoc.auth_supported == 0) {
5451 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5452 (chk_length > (sizeof(struct sctp_auth_chunk) +
5453 SCTP_AUTH_DIGEST_LEN_MAX))) {
5456 SCTP_TCB_UNLOCK(locked_tcb);
5461 if (got_auth == 1) {
5462 /* skip this chunk... it's already auth'd */
5466 if ((ch == NULL) || sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch,
5468 /* auth HMAC failed so dump the packet */
5472 /* remaining chunks are HMAC checked */
5473 stcb->asoc.authenticated = 1;
5479 /* it's an unknown chunk! */
5480 if ((ch->chunk_type & 0x40) && (stcb != NULL)) {
5482 struct sctp_paramhdr *phd;
5484 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
5485 0, M_NOWAIT, 1, MT_DATA);
5487 phd = mtod(mm, struct sctp_paramhdr *);
5489 * We cheat and use param type since
5490 * we did not bother to define a
5491 * error cause struct. They are the
5492 * same basic format with different
5495 phd->param_type = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5496 phd->param_length = htons(chk_length + sizeof(*phd));
5497 SCTP_BUF_LEN(mm) = sizeof(*phd);
5498 SCTP_BUF_NEXT(mm) = SCTP_M_COPYM(m, *offset, chk_length, M_NOWAIT);
5499 if (SCTP_BUF_NEXT(mm)) {
5500 if (sctp_pad_lastmbuf(SCTP_BUF_NEXT(mm), SCTP_SIZE32(chk_length) - chk_length, NULL) == NULL) {
5503 #ifdef SCTP_MBUF_LOGGING
5504 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5507 for (mat = SCTP_BUF_NEXT(mm); mat; mat = SCTP_BUF_NEXT(mat)) {
5508 if (SCTP_BUF_IS_EXTENDED(mat)) {
5509 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
5514 sctp_queue_op_err(stcb, mm);
5521 if ((ch->chunk_type & 0x80) == 0) {
5522 /* discard this packet */
5525 } /* else skip this bad chunk and continue... */
5527 } /* switch (ch->chunk_type) */
5531 /* get the next chunk */
5532 *offset += SCTP_SIZE32(chk_length);
5533 if (*offset >= length) {
5534 /* no more data left in the mbuf chain */
5537 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5538 sizeof(struct sctp_chunkhdr), chunk_buf);
5541 SCTP_TCB_UNLOCK(locked_tcb);
5548 if (asconf_cnt > 0 && stcb != NULL) {
5549 sctp_send_asconf_ack(stcb);
5557 __attribute__((noinline))
5560 sctp_validate_no_locks(struct sctp_inpcb *inp)
5562 struct sctp_tcb *lstcb;
5564 LIST_FOREACH(lstcb, &inp->sctp_asoc_list, sctp_tcblist) {
5565 if (mtx_owned(&lstcb->tcb_mtx)) {
5566 panic("Own lock on stcb at return from input");
5569 if (mtx_owned(&inp->inp_create_mtx)) {
5570 panic("Own create lock on inp");
5572 if (mtx_owned(&inp->inp_mtx)) {
5573 panic("Own inp lock on inp");
5580 * common input chunk processing (v4 and v6)
5583 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5584 struct sockaddr *src, struct sockaddr *dst,
5585 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5586 #if !defined(SCTP_WITH_NO_CSUM)
5587 uint8_t compute_crc,
5590 uint8_t use_mflowid, uint32_t mflowid,
5591 uint32_t vrf_id, uint16_t port)
5594 int fwd_tsn_seen = 0, data_processed = 0;
5595 struct mbuf *m = *mm, *op_err;
5596 char msg[SCTP_DIAG_INFO_LEN];
5598 int cnt_ctrl_ready = 0;
5599 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5600 struct sctp_tcb *stcb = NULL;
5601 struct sctp_nets *net = NULL;
5603 SCTP_STAT_INCR(sctps_recvdatagrams);
5604 #ifdef SCTP_AUDITING_ENABLED
5605 sctp_audit_log(0xE0, 1);
5606 sctp_auditing(0, inp, stcb, net);
5608 #if !defined(SCTP_WITH_NO_CSUM)
5609 if (compute_crc != 0) {
5610 uint32_t check, calc_check;
5612 check = sh->checksum;
5614 calc_check = sctp_calculate_cksum(m, iphlen);
5615 sh->checksum = check;
5616 if (calc_check != check) {
5617 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5618 calc_check, check, (void *)m, length, iphlen);
5619 stcb = sctp_findassociation_addr(m, offset, src, dst,
5620 sh, ch, &inp, &net, vrf_id);
5621 #if defined(INET) || defined(INET6)
5622 if ((net != NULL) && (port != 0)) {
5623 if (net->port == 0) {
5624 sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
5629 if ((net != NULL) && (use_mflowid != 0)) {
5630 net->flowid = mflowid;
5635 if ((inp != NULL) && (stcb != NULL)) {
5636 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5637 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5638 } else if ((inp != NULL) && (stcb == NULL)) {
5641 SCTP_STAT_INCR(sctps_badsum);
5642 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5647 /* Destination port of 0 is illegal, based on RFC4960. */
5648 if (sh->dest_port == 0) {
5649 SCTP_STAT_INCR(sctps_hdrops);
5652 stcb = sctp_findassociation_addr(m, offset, src, dst,
5653 sh, ch, &inp, &net, vrf_id);
5654 #if defined(INET) || defined(INET6)
5655 if ((net != NULL) && (port != 0)) {
5656 if (net->port == 0) {
5657 sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
5662 if ((net != NULL) && (use_mflowid != 0)) {
5663 net->flowid = mflowid;
5669 SCTP_STAT_INCR(sctps_noport);
5670 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5673 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5674 sctp_send_shutdown_complete2(src, dst, sh,
5675 use_mflowid, mflowid,
5679 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5682 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5683 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5684 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5685 (ch->chunk_type != SCTP_INIT))) {
5686 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5688 sctp_send_abort(m, iphlen, src, dst,
5690 use_mflowid, mflowid,
5695 } else if (stcb == NULL) {
5700 * I very much doubt any of the IPSEC stuff will work but I have no
5701 * idea, so I will leave it in place.
5704 switch (dst->sa_family) {
5707 if (ipsec4_in_reject(m, &inp->ip_inp.inp)) {
5708 IPSECSTAT_INC(ips_in_polvio);
5709 SCTP_STAT_INCR(sctps_hdrops);
5716 if (ipsec6_in_reject(m, &inp->ip_inp.inp)) {
5717 IPSEC6STAT_INC(ips_in_polvio);
5718 SCTP_STAT_INCR(sctps_hdrops);
5728 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5729 (void *)m, iphlen, offset, length, (void *)stcb);
5731 /* always clear this before beginning a packet */
5732 stcb->asoc.authenticated = 0;
5733 stcb->asoc.seen_a_sack_this_pkt = 0;
5734 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5735 (void *)stcb, stcb->asoc.state);
5737 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5738 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5740 * If we hit here, we had a ref count
5741 * up when the assoc was aborted and the
5742 * timer is clearing out the assoc, we should
5743 * NOT respond to any packet.. its OOTB.
5745 SCTP_TCB_UNLOCK(stcb);
5747 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__);
5748 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5750 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5751 use_mflowid, mflowid,
5756 if (IS_SCTP_CONTROL(ch)) {
5757 /* process the control portion of the SCTP packet */
5758 /* sa_ignore NO_NULL_CHK */
5759 stcb = sctp_process_control(m, iphlen, &offset, length,
5761 inp, stcb, &net, &fwd_tsn_seen,
5762 use_mflowid, mflowid,
5766 * This covers us if the cookie-echo was there and
5767 * it changes our INP.
5769 inp = stcb->sctp_ep;
5770 #if defined(INET) || defined(INET6)
5771 if ((net) && (port)) {
5772 if (net->port == 0) {
5773 sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
5781 * no control chunks, so pre-process DATA chunks (these
5782 * checks are taken care of by control processing)
5786 * if DATA only packet, and auth is required, then punt...
5787 * can't have authenticated without any AUTH (control)
5790 if ((stcb != NULL) &&
5791 (stcb->asoc.auth_supported == 1) &&
5792 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5793 /* "silently" ignore */
5794 SCTP_STAT_INCR(sctps_recvauthmissing);
5798 /* out of the blue DATA chunk */
5799 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__);
5800 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5802 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5803 use_mflowid, mflowid,
5807 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5808 /* v_tag mismatch! */
5809 SCTP_STAT_INCR(sctps_badvtag);
5816 * no valid TCB for this packet, or we found it's a bad
5817 * packet while processing control, or we're done with this
5818 * packet (done or skip rest of data), so we drop it...
5823 * DATA chunk processing
5825 /* plow through the data chunks while length > offset */
5828 * Rest should be DATA only. Check authentication state if AUTH for
5831 if ((length > offset) &&
5833 (stcb->asoc.auth_supported == 1) &&
5834 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5835 !stcb->asoc.authenticated) {
5836 /* "silently" ignore */
5837 SCTP_STAT_INCR(sctps_recvauthmissing);
5838 SCTPDBG(SCTP_DEBUG_AUTH1,
5839 "Data chunk requires AUTH, skipped\n");
5842 if (length > offset) {
5846 * First check to make sure our state is correct. We would
5847 * not get here unless we really did have a tag, so we don't
5848 * abort if this happens, just dump the chunk silently.
5850 switch (SCTP_GET_STATE(&stcb->asoc)) {
5851 case SCTP_STATE_COOKIE_ECHOED:
5853 * we consider data with valid tags in this state
5854 * shows us the cookie-ack was lost. Imply it was
5857 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5858 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5859 stcb->asoc.overall_error_count,
5861 SCTP_FROM_SCTP_INPUT,
5864 stcb->asoc.overall_error_count = 0;
5865 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5867 case SCTP_STATE_COOKIE_WAIT:
5869 * We consider OOTB any data sent during asoc setup.
5871 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__);
5872 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5874 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5875 use_mflowid, mflowid,
5878 /* sa_ignore NOTREACHED */
5880 case SCTP_STATE_EMPTY: /* should not happen */
5881 case SCTP_STATE_INUSE: /* should not happen */
5882 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5883 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5886 /* sa_ignore NOTREACHED */
5888 case SCTP_STATE_OPEN:
5889 case SCTP_STATE_SHUTDOWN_SENT:
5892 /* plow through the data chunks while length > offset */
5893 retval = sctp_process_data(mm, iphlen, &offset, length,
5895 inp, stcb, net, &high_tsn,
5896 use_mflowid, mflowid,
5900 * The association aborted, NO UNLOCK needed since
5901 * the association is destroyed.
5908 * Anything important needs to have been m_copy'ed in
5912 /* take care of ecn */
5913 if ((data_processed == 1) &&
5914 (stcb->asoc.ecn_supported == 1) &&
5915 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5916 /* Yep, we need to add a ECNE */
5917 sctp_send_ecn_echo(stcb, net, high_tsn);
5919 if ((data_processed == 0) && (fwd_tsn_seen)) {
5921 uint32_t highest_tsn;
5923 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5924 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5926 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5928 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5929 stcb->asoc.send_sack = 1;
5930 sctp_sack_check(stcb, was_a_gap);
5931 } else if (fwd_tsn_seen) {
5932 stcb->asoc.send_sack = 1;
5934 /* trigger send of any chunks in queue... */
5936 #ifdef SCTP_AUDITING_ENABLED
5937 sctp_audit_log(0xE0, 2);
5938 sctp_auditing(1, inp, stcb, net);
5940 SCTPDBG(SCTP_DEBUG_INPUT1,
5941 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5942 stcb->asoc.peers_rwnd,
5943 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5944 stcb->asoc.total_flight);
5945 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5946 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5947 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5949 if (cnt_ctrl_ready ||
5951 (stcb->asoc.peers_rwnd > 0 ||
5952 (stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) {
5953 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5954 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5955 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5957 #ifdef SCTP_AUDITING_ENABLED
5958 sctp_audit_log(0xE0, 3);
5959 sctp_auditing(2, inp, stcb, net);
5963 SCTP_TCB_UNLOCK(stcb);
5965 if (inp_decr != NULL) {
5966 /* reduce ref-count */
5967 SCTP_INP_WLOCK(inp_decr);
5968 SCTP_INP_DECR_REF(inp_decr);
5969 SCTP_INP_WUNLOCK(inp_decr);
5973 sctp_validate_no_locks(inp);
5981 sctp_print_mbuf_chain(struct mbuf *m)
5983 for (; m; m = SCTP_BUF_NEXT(m)) {
5984 SCTP_PRINTF("%p: m_len = %ld\n", (void *)m, SCTP_BUF_LEN(m));
5985 if (SCTP_BUF_IS_EXTENDED(m))
5986 SCTP_PRINTF("%p: extend_size = %d\n", (void *)m, SCTP_BUF_EXTEND_SIZE(m));
5994 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5998 uint32_t vrf_id = 0;
6000 struct sockaddr_in src, dst;
6003 struct sctp_chunkhdr *ch;
6006 #if !defined(SCTP_WITH_NO_CSUM)
6007 uint8_t compute_crc;
6011 uint8_t use_mflowid;
6014 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
6015 SCTP_RELEASE_PKT(i_pak);
6018 m = SCTP_HEADER_TO_CHAIN(i_pak);
6019 #ifdef SCTP_MBUF_LOGGING
6020 /* Log in any input mbufs */
6021 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6024 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6025 if (SCTP_BUF_IS_EXTENDED(mat)) {
6026 sctp_log_mb(mat, SCTP_MBUF_INPUT);
6031 #ifdef SCTP_PACKET_LOGGING
6032 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
6036 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
6037 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
6039 if_name(m->m_pkthdr.rcvif),
6040 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
6041 if (m->m_flags & M_FLOWID) {
6042 mflowid = m->m_pkthdr.flowid;
6048 SCTP_STAT_INCR(sctps_recvpackets);
6049 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
6050 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
6051 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
6052 if (SCTP_BUF_LEN(m) < offset) {
6053 if ((m = m_pullup(m, offset)) == NULL) {
6054 SCTP_STAT_INCR(sctps_hdrops);
6058 ip = mtod(m, struct ip *);
6059 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
6060 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
6061 offset -= sizeof(struct sctp_chunkhdr);
6062 memset(&src, 0, sizeof(struct sockaddr_in));
6063 src.sin_family = AF_INET;
6064 src.sin_len = sizeof(struct sockaddr_in);
6065 src.sin_port = sh->src_port;
6066 src.sin_addr = ip->ip_src;
6067 memset(&dst, 0, sizeof(struct sockaddr_in));
6068 dst.sin_family = AF_INET;
6069 dst.sin_len = sizeof(struct sockaddr_in);
6070 dst.sin_port = sh->dest_port;
6071 dst.sin_addr = ip->ip_dst;
6072 length = ntohs(ip->ip_len);
6073 /* Validate mbuf chain length with IP payload length. */
6074 if (SCTP_HEADER_LEN(m) != length) {
6075 SCTPDBG(SCTP_DEBUG_INPUT1,
6076 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
6077 SCTP_STAT_INCR(sctps_hdrops);
6080 /* SCTP does not allow broadcasts or multicasts */
6081 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
6084 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
6087 ecn_bits = ip->ip_tos;
6088 #if defined(SCTP_WITH_NO_CSUM)
6089 SCTP_STAT_INCR(sctps_recvnocrc);
6091 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
6092 SCTP_STAT_INCR(sctps_recvhwcrc);
6095 SCTP_STAT_INCR(sctps_recvswcrc);
6099 sctp_common_input_processing(&m, iphlen, offset, length,
6100 (struct sockaddr *)&src,
6101 (struct sockaddr *)&dst,
6103 #if !defined(SCTP_WITH_NO_CSUM)
6107 use_mflowid, mflowid,
6116 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6117 extern int *sctp_cpuarry;
6122 sctp_input(struct mbuf *m, int off)
6124 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6129 uint32_t flowid, tag;
6132 if (m->m_flags & M_FLOWID) {
6133 flowid = m->m_pkthdr.flowid;
6136 * No flow id built by lower layers fix it so we
6139 offset = off + sizeof(struct sctphdr);
6140 if (SCTP_BUF_LEN(m) < offset) {
6141 if ((m = m_pullup(m, offset)) == NULL) {
6142 SCTP_STAT_INCR(sctps_hdrops);
6146 ip = mtod(m, struct ip *);
6147 sh = (struct sctphdr *)((caddr_t)ip + off);
6148 tag = htonl(sh->v_tag);
6149 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
6150 m->m_pkthdr.flowid = flowid;
6151 m->m_flags |= M_FLOWID;
6153 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
6154 sctp_queue_to_mcore(m, off, cpu_to_use);
6158 sctp_input_with_port(m, off, 0);