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 mflowtype, 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,
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,
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,
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,
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,
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,
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 mflowtype, mflowid, inp->fibnum,
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,
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 */
360 outs->state = SCTP_STREAM_CLOSED;
363 /* cut back the count */
364 asoc->pre_open_streams = newcnt;
366 SCTP_TCB_SEND_UNLOCK(stcb);
367 asoc->streamoutcnt = asoc->pre_open_streams;
368 for (i = 0; i < asoc->streamoutcnt; i++) {
369 asoc->strmout[i].state = SCTP_STREAM_OPEN;
371 /* EY - nr_sack: initialize highest tsn in nr_mapping_array */
372 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
373 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
374 sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
376 /* This is the next one we expect */
377 asoc->str_reset_seq_in = asoc->asconf_seq_in + 1;
379 asoc->mapping_array_base_tsn = ntohl(init->initial_tsn);
380 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->asconf_seq_in;
382 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
383 /* open the requested streams */
385 if (asoc->strmin != NULL) {
386 /* Free the old ones */
387 struct sctp_queued_to_read *ctl, *nctl;
389 for (i = 0; i < asoc->streamincnt; i++) {
390 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
391 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
392 sctp_free_remote_addr(ctl->whoFrom);
394 sctp_m_freem(ctl->data);
396 sctp_free_a_readq(stcb, ctl);
399 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
401 if (asoc->max_inbound_streams > ntohs(init->num_outbound_streams)) {
402 asoc->streamincnt = ntohs(init->num_outbound_streams);
404 asoc->streamincnt = asoc->max_inbound_streams;
406 SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt *
407 sizeof(struct sctp_stream_in), SCTP_M_STRMI);
408 if (asoc->strmin == NULL) {
409 /* we didn't get memory for the streams! */
410 SCTPDBG(SCTP_DEBUG_INPUT2, "process_init: couldn't get memory for the streams!\n");
413 for (i = 0; i < asoc->streamincnt; i++) {
414 asoc->strmin[i].stream_no = i;
415 asoc->strmin[i].last_sequence_delivered = 0xffff;
416 TAILQ_INIT(&asoc->strmin[i].inqueue);
417 asoc->strmin[i].delivery_started = 0;
420 * load_address_from_init will put the addresses into the
421 * association when the COOKIE is processed or the INIT-ACK is
422 * processed. Both types of COOKIE's existing and new call this
423 * routine. It will remove addresses that are no longer in the
424 * association (for the restarting case where addresses are
425 * removed). Up front when the INIT arrives we will discard it if it
426 * is a restart and new addresses have been added.
428 /* sa_ignore MEMLEAK */
433 * INIT-ACK message processing/consumption returns value < 0 on error
436 sctp_process_init_ack(struct mbuf *m, int iphlen, int offset,
437 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
438 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
439 struct sctp_nets *net, int *abort_no_unlock,
440 uint8_t mflowtype, uint32_t mflowid,
443 struct sctp_association *asoc;
445 int retval, abort_flag;
446 uint32_t initack_limit;
447 int nat_friendly = 0;
449 /* First verify that we have no illegal param's */
452 op_err = sctp_arethere_unrecognized_parameters(m,
453 (offset + sizeof(struct sctp_init_chunk)),
454 &abort_flag, (struct sctp_chunkhdr *)cp, &nat_friendly);
456 /* Send an abort and notify peer */
457 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
458 *abort_no_unlock = 1;
462 asoc->peer_supports_nat = (uint8_t) nat_friendly;
463 /* process the peer's parameters in the INIT-ACK */
464 retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb);
468 initack_limit = offset + ntohs(cp->ch.chunk_length);
469 /* load all addresses */
470 if ((retval = sctp_load_addresses_from_init(stcb, m,
471 (offset + sizeof(struct sctp_init_chunk)), initack_limit,
473 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
474 "Problem with address parameters");
475 SCTPDBG(SCTP_DEBUG_INPUT1,
476 "Load addresses from INIT causes an abort %d\n",
478 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
479 src, dst, sh, op_err,
482 *abort_no_unlock = 1;
485 /* if the peer doesn't support asconf, flush the asconf queue */
486 if (asoc->asconf_supported == 0) {
487 struct sctp_asconf_addr *param, *nparam;
489 TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
490 TAILQ_REMOVE(&asoc->asconf_queue, param, next);
491 SCTP_FREE(param, SCTP_M_ASC_ADDR);
494 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
495 stcb->asoc.local_hmacs);
497 sctp_queue_op_err(stcb, op_err);
498 /* queuing will steal away the mbuf chain to the out queue */
501 /* extract the cookie and queue it to "echo" it back... */
502 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
503 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
504 stcb->asoc.overall_error_count,
506 SCTP_FROM_SCTP_INPUT,
509 stcb->asoc.overall_error_count = 0;
510 net->error_count = 0;
513 * Cancel the INIT timer, We do this first before queueing the
514 * cookie. We always cancel at the primary to assue that we are
515 * canceling the timer started by the INIT which always goes to the
518 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
519 asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
521 /* calculate the RTO */
522 net->RTO = sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered, sctp_align_safe_nocopy,
523 SCTP_RTT_FROM_NON_DATA);
525 retval = sctp_send_cookie_echo(m, offset, stcb, net);
528 * No cookie, we probably should send a op error. But in any
529 * case if there is no cookie in the INIT-ACK, we can
530 * abandon the peer, its broke.
533 /* We abort with an error of missing mandatory param */
534 op_err = sctp_generate_cause(SCTP_CAUSE_MISSING_PARAM, "");
537 * Expand beyond to include the mandatory
540 struct sctp_inv_mandatory_param *mp;
542 SCTP_BUF_LEN(op_err) =
543 sizeof(struct sctp_inv_mandatory_param);
545 struct sctp_inv_mandatory_param *);
546 /* Subtract the reserved param */
548 htons(sizeof(struct sctp_inv_mandatory_param) - 2);
549 mp->num_param = htonl(1);
550 mp->param = htons(SCTP_STATE_COOKIE);
553 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
554 src, dst, sh, op_err,
557 *abort_no_unlock = 1;
565 sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp,
566 struct sctp_tcb *stcb, struct sctp_nets *net)
568 union sctp_sockstore store;
569 struct sctp_nets *r_net, *f_net;
572 uint16_t old_error_counter;
574 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) {
578 memset(&store, 0, sizeof(store));
579 switch (cp->heartbeat.hb_info.addr_family) {
582 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
583 store.sin.sin_family = cp->heartbeat.hb_info.addr_family;
584 store.sin.sin_len = cp->heartbeat.hb_info.addr_len;
585 store.sin.sin_port = stcb->rport;
586 memcpy(&store.sin.sin_addr, cp->heartbeat.hb_info.address,
587 sizeof(store.sin.sin_addr));
595 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
596 store.sin6.sin6_family = cp->heartbeat.hb_info.addr_family;
597 store.sin6.sin6_len = cp->heartbeat.hb_info.addr_len;
598 store.sin6.sin6_port = stcb->rport;
599 memcpy(&store.sin6.sin6_addr, cp->heartbeat.hb_info.address, sizeof(struct in6_addr));
608 r_net = sctp_findnet(stcb, &store.sa);
610 SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
613 if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
614 (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
615 (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
617 * If the its a HB and it's random value is correct when can
618 * confirm the destination.
620 r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
621 if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
622 stcb->asoc.primary_destination = r_net;
623 r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
624 f_net = TAILQ_FIRST(&stcb->asoc.nets);
625 if (f_net != r_net) {
627 * first one on the list is NOT the primary
628 * sctp_cmpaddr() is much more efficent if
629 * the primary is the first on the list,
632 TAILQ_REMOVE(&stcb->asoc.nets, r_net, sctp_next);
633 TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
637 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
638 stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
639 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
640 r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
641 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
643 old_error_counter = r_net->error_count;
644 r_net->error_count = 0;
645 r_net->hb_responded = 1;
646 tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
647 tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
648 /* Now lets do a RTO with this */
649 r_net->RTO = sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv, sctp_align_safe_nocopy,
650 SCTP_RTT_FROM_NON_DATA);
651 if (!(r_net->dest_state & SCTP_ADDR_REACHABLE)) {
652 r_net->dest_state |= SCTP_ADDR_REACHABLE;
653 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
654 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
656 if (r_net->dest_state & SCTP_ADDR_PF) {
657 r_net->dest_state &= ~SCTP_ADDR_PF;
658 stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
660 if (old_error_counter > 0) {
661 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
662 stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5);
663 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
665 if (r_net == stcb->asoc.primary_destination) {
666 if (stcb->asoc.alternate) {
667 /* release the alternate, primary is good */
668 sctp_free_remote_addr(stcb->asoc.alternate);
669 stcb->asoc.alternate = NULL;
672 /* Mobility adaptation */
674 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
675 SCTP_MOBILITY_BASE) ||
676 sctp_is_mobility_feature_on(stcb->sctp_ep,
677 SCTP_MOBILITY_FASTHANDOFF)) &&
678 sctp_is_mobility_feature_on(stcb->sctp_ep,
679 SCTP_MOBILITY_PRIM_DELETED)) {
681 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
682 stcb->sctp_ep, stcb, NULL,
683 SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
684 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
685 SCTP_MOBILITY_FASTHANDOFF)) {
686 sctp_assoc_immediate_retrans(stcb,
687 stcb->asoc.primary_destination);
689 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
690 SCTP_MOBILITY_BASE)) {
691 sctp_move_chunks_from_net(stcb,
692 stcb->asoc.deleted_primary);
694 sctp_delete_prim_timer(stcb->sctp_ep, stcb,
695 stcb->asoc.deleted_primary);
701 sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
704 * return 0 means we want you to proceed with the abort non-zero
705 * means no abort processing
707 struct sctpasochead *head;
709 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_WAIT) {
710 /* generate a new vtag and send init */
711 LIST_REMOVE(stcb, sctp_asocs);
712 stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
713 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
715 * put it in the bucket in the vtag hash of assoc's for the
718 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
719 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
722 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
724 * treat like a case where the cookie expired i.e.: - dump
725 * current cookie. - generate a new vtag. - resend init.
727 /* generate a new vtag and send init */
728 LIST_REMOVE(stcb, sctp_asocs);
729 stcb->asoc.state &= ~SCTP_STATE_COOKIE_ECHOED;
730 stcb->asoc.state |= SCTP_STATE_COOKIE_WAIT;
731 sctp_stop_all_cookie_timers(stcb);
732 sctp_toss_old_cookies(stcb, &stcb->asoc);
733 stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
734 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
736 * put it in the bucket in the vtag hash of assoc's for the
739 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
740 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
747 sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
748 struct sctp_nets *net)
751 * return 0 means we want you to proceed with the abort non-zero
752 * means no abort processing
754 if (stcb->asoc.auth_supported == 0) {
755 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
758 sctp_asconf_send_nat_state_update(stcb, net);
764 sctp_handle_abort(struct sctp_abort_chunk *abort,
765 struct sctp_tcb *stcb, struct sctp_nets *net)
767 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
774 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
778 len = ntohs(abort->ch.chunk_length);
779 if (len > sizeof(struct sctp_chunkhdr)) {
781 * Need to check the cause codes for our two magic nat
782 * aborts which don't kill the assoc necessarily.
784 struct sctp_missing_nat_state *natc;
786 natc = (struct sctp_missing_nat_state *)(abort + 1);
787 error = ntohs(natc->cause);
788 if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
789 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
790 abort->ch.chunk_flags);
791 if (sctp_handle_nat_colliding_state(stcb)) {
794 } else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
795 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
796 abort->ch.chunk_flags);
797 if (sctp_handle_nat_missing_state(stcb, net)) {
804 /* stop any receive timers */
805 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, net,
806 SCTP_FROM_SCTP_INPUT + SCTP_LOC_7);
807 /* notify user of the abort and clean up... */
808 sctp_abort_notification(stcb, 1, error, abort, SCTP_SO_NOT_LOCKED);
810 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
811 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
812 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
813 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
815 #ifdef SCTP_ASOCLOG_OF_TSNS
816 sctp_print_out_track_log(stcb);
818 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
819 so = SCTP_INP_SO(stcb->sctp_ep);
820 atomic_add_int(&stcb->asoc.refcnt, 1);
821 SCTP_TCB_UNLOCK(stcb);
822 SCTP_SOCKET_LOCK(so, 1);
824 atomic_subtract_int(&stcb->asoc.refcnt, 1);
826 stcb->asoc.state |= SCTP_STATE_WAS_ABORTED;
827 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
828 SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
829 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
830 SCTP_SOCKET_UNLOCK(so, 1);
832 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
836 sctp_start_net_timers(struct sctp_tcb *stcb)
838 uint32_t cnt_hb_sent;
839 struct sctp_nets *net;
842 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
844 * For each network start: 1) A pmtu timer. 2) A HB timer 3)
845 * If the dest in unconfirmed send a hb as well if under
846 * max_hb_burst have been sent.
848 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
849 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
850 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
851 (cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
852 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
857 sctp_chunk_output(stcb->sctp_ep, stcb,
858 SCTP_OUTPUT_FROM_COOKIE_ACK,
865 sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
866 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
868 struct sctp_association *asoc;
869 int some_on_streamwheel;
871 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
876 SCTPDBG(SCTP_DEBUG_INPUT2,
877 "sctp_handle_shutdown: handling SHUTDOWN\n");
881 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
882 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
885 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
886 /* Shutdown NOT the expected size */
889 sctp_update_acked(stcb, cp, abort_flag);
894 if (asoc->control_pdapi) {
896 * With a normal shutdown we assume the end of last record.
898 SCTP_INP_READ_LOCK(stcb->sctp_ep);
899 asoc->control_pdapi->end_added = 1;
900 asoc->control_pdapi->pdapi_aborted = 1;
901 asoc->control_pdapi = NULL;
902 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
903 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
904 so = SCTP_INP_SO(stcb->sctp_ep);
905 atomic_add_int(&stcb->asoc.refcnt, 1);
906 SCTP_TCB_UNLOCK(stcb);
907 SCTP_SOCKET_LOCK(so, 1);
909 atomic_subtract_int(&stcb->asoc.refcnt, 1);
910 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
911 /* assoc was freed while we were unlocked */
912 SCTP_SOCKET_UNLOCK(so, 1);
916 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
917 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
918 SCTP_SOCKET_UNLOCK(so, 1);
921 /* goto SHUTDOWN_RECEIVED state to block new requests */
922 if (stcb->sctp_socket) {
923 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
924 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
925 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) {
926 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_RECEIVED);
927 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
929 * notify upper layer that peer has initiated a
932 sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
935 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
938 if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) {
940 * stop the shutdown timer, since we WILL move to
943 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
944 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
946 /* Now is there unsent data on a stream somewhere? */
947 some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
949 if (!TAILQ_EMPTY(&asoc->send_queue) ||
950 !TAILQ_EMPTY(&asoc->sent_queue) ||
951 some_on_streamwheel) {
952 /* By returning we will push more data out */
955 /* no outstanding data to send, so move on... */
956 /* send SHUTDOWN-ACK */
957 /* move to SHUTDOWN-ACK-SENT state */
958 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
959 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
960 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
962 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_ACK_SENT);
963 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
964 sctp_stop_timers_for_shutdown(stcb);
965 sctp_send_shutdown_ack(stcb, net);
966 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep,
972 sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
973 struct sctp_tcb *stcb,
974 struct sctp_nets *net)
976 struct sctp_association *asoc;
978 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
981 so = SCTP_INP_SO(stcb->sctp_ep);
983 SCTPDBG(SCTP_DEBUG_INPUT2,
984 "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
989 /* process according to association state */
990 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
991 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
992 /* unexpected SHUTDOWN-ACK... do OOTB handling... */
993 sctp_send_shutdown_complete(stcb, net, 1);
994 SCTP_TCB_UNLOCK(stcb);
997 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
998 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
999 /* unexpected SHUTDOWN-ACK... so ignore... */
1000 SCTP_TCB_UNLOCK(stcb);
1003 if (asoc->control_pdapi) {
1005 * With a normal shutdown we assume the end of last record.
1007 SCTP_INP_READ_LOCK(stcb->sctp_ep);
1008 asoc->control_pdapi->end_added = 1;
1009 asoc->control_pdapi->pdapi_aborted = 1;
1010 asoc->control_pdapi = NULL;
1011 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
1012 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1013 atomic_add_int(&stcb->asoc.refcnt, 1);
1014 SCTP_TCB_UNLOCK(stcb);
1015 SCTP_SOCKET_LOCK(so, 1);
1016 SCTP_TCB_LOCK(stcb);
1017 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1018 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1019 /* assoc was freed while we were unlocked */
1020 SCTP_SOCKET_UNLOCK(so, 1);
1024 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
1025 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1026 SCTP_SOCKET_UNLOCK(so, 1);
1030 if (!TAILQ_EMPTY(&asoc->send_queue) ||
1031 !TAILQ_EMPTY(&asoc->sent_queue) ||
1032 !stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
1033 panic("Queues are not empty when handling SHUTDOWN-ACK");
1036 /* stop the timer */
1037 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net,
1038 SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
1039 /* send SHUTDOWN-COMPLETE */
1040 sctp_send_shutdown_complete(stcb, net, 0);
1041 /* notify upper layer protocol */
1042 if (stcb->sctp_socket) {
1043 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1044 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1045 stcb->sctp_socket->so_snd.sb_cc = 0;
1047 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
1049 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
1050 /* free the TCB but first save off the ep */
1051 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1052 atomic_add_int(&stcb->asoc.refcnt, 1);
1053 SCTP_TCB_UNLOCK(stcb);
1054 SCTP_SOCKET_LOCK(so, 1);
1055 SCTP_TCB_LOCK(stcb);
1056 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1058 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1059 SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
1060 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1061 SCTP_SOCKET_UNLOCK(so, 1);
1066 * Skip past the param header and then we will find the chunk that caused the
1067 * problem. There are two possiblities ASCONF or FWD-TSN other than that and
1068 * our peer must be broken.
1071 sctp_process_unrecog_chunk(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr,
1072 struct sctp_nets *net)
1074 struct sctp_chunkhdr *chk;
1076 chk = (struct sctp_chunkhdr *)((caddr_t)phdr + sizeof(*phdr));
1077 switch (chk->chunk_type) {
1078 case SCTP_ASCONF_ACK:
1080 sctp_asconf_cleanup(stcb, net);
1082 case SCTP_FORWARD_CUM_TSN:
1083 stcb->asoc.prsctp_supported = 0;
1086 SCTPDBG(SCTP_DEBUG_INPUT2,
1087 "Peer does not support chunk type %d(%x)??\n",
1088 chk->chunk_type, (uint32_t) chk->chunk_type);
1094 * Skip past the param header and then we will find the param that caused the
1095 * problem. There are a number of param's in a ASCONF OR the prsctp param
1096 * these will turn of specific features.
1097 * XXX: Is this the right thing to do?
1100 sctp_process_unrecog_param(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr)
1102 struct sctp_paramhdr *pbad;
1105 switch (ntohs(pbad->param_type)) {
1107 case SCTP_PRSCTP_SUPPORTED:
1108 stcb->asoc.prsctp_supported = 0;
1110 case SCTP_SUPPORTED_CHUNK_EXT:
1112 /* draft-ietf-tsvwg-addip-sctp */
1113 case SCTP_HAS_NAT_SUPPORT:
1114 stcb->asoc.peer_supports_nat = 0;
1116 case SCTP_ADD_IP_ADDRESS:
1117 case SCTP_DEL_IP_ADDRESS:
1118 case SCTP_SET_PRIM_ADDR:
1119 stcb->asoc.asconf_supported = 0;
1121 case SCTP_SUCCESS_REPORT:
1122 case SCTP_ERROR_CAUSE_IND:
1123 SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
1124 SCTPDBG(SCTP_DEBUG_INPUT2,
1125 "Turning off ASCONF to this strange peer\n");
1126 stcb->asoc.asconf_supported = 0;
1129 SCTPDBG(SCTP_DEBUG_INPUT2,
1130 "Peer does not support param type %d(%x)??\n",
1131 pbad->param_type, (uint32_t) pbad->param_type);
1137 sctp_handle_error(struct sctp_chunkhdr *ch,
1138 struct sctp_tcb *stcb, struct sctp_nets *net)
1141 struct sctp_paramhdr *phdr;
1142 uint16_t error, error_type;
1144 struct sctp_association *asoc;
1147 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1152 /* parse through all of the errors and process */
1154 phdr = (struct sctp_paramhdr *)((caddr_t)ch +
1155 sizeof(struct sctp_chunkhdr));
1156 chklen = ntohs(ch->chunk_length) - sizeof(struct sctp_chunkhdr);
1158 while ((size_t)chklen >= sizeof(struct sctp_paramhdr)) {
1159 /* Process an Error Cause */
1160 error_type = ntohs(phdr->param_type);
1161 error_len = ntohs(phdr->param_length);
1162 if ((error_len > chklen) || (error_len == 0)) {
1163 /* invalid param length for this param */
1164 SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in error param- chunk left:%d errorlen:%d\n",
1169 /* report the first error cause */
1172 switch (error_type) {
1173 case SCTP_CAUSE_INVALID_STREAM:
1174 case SCTP_CAUSE_MISSING_PARAM:
1175 case SCTP_CAUSE_INVALID_PARAM:
1176 case SCTP_CAUSE_NO_USER_DATA:
1177 SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %d back? We have a bug :/ (or do they?)\n",
1180 case SCTP_CAUSE_NAT_COLLIDING_STATE:
1181 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
1183 if (sctp_handle_nat_colliding_state(stcb)) {
1187 case SCTP_CAUSE_NAT_MISSING_STATE:
1188 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
1190 if (sctp_handle_nat_missing_state(stcb, net)) {
1194 case SCTP_CAUSE_STALE_COOKIE:
1196 * We only act if we have echoed a cookie and are
1199 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) {
1202 p = (int *)((caddr_t)phdr + sizeof(*phdr));
1203 /* Save the time doubled */
1204 asoc->cookie_preserve_req = ntohl(*p) << 1;
1205 asoc->stale_cookie_count++;
1206 if (asoc->stale_cookie_count >
1207 asoc->max_init_times) {
1208 sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
1209 /* now free the asoc */
1210 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1211 so = SCTP_INP_SO(stcb->sctp_ep);
1212 atomic_add_int(&stcb->asoc.refcnt, 1);
1213 SCTP_TCB_UNLOCK(stcb);
1214 SCTP_SOCKET_LOCK(so, 1);
1215 SCTP_TCB_LOCK(stcb);
1216 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1218 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1219 SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
1220 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1221 SCTP_SOCKET_UNLOCK(so, 1);
1225 /* blast back to INIT state */
1226 sctp_toss_old_cookies(stcb, &stcb->asoc);
1227 asoc->state &= ~SCTP_STATE_COOKIE_ECHOED;
1228 asoc->state |= SCTP_STATE_COOKIE_WAIT;
1229 sctp_stop_all_cookie_timers(stcb);
1230 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
1233 case SCTP_CAUSE_UNRESOLVABLE_ADDR:
1235 * Nothing we can do here, we don't do hostname
1236 * addresses so if the peer does not like my IPv6
1237 * (or IPv4 for that matter) it does not matter. If
1238 * they don't support that type of address, they can
1239 * NOT possibly get that packet type... i.e. with no
1240 * IPv6 you can't recieve a IPv6 packet. so we can
1241 * safely ignore this one. If we ever added support
1242 * for HOSTNAME Addresses, then we would need to do
1246 case SCTP_CAUSE_UNRECOG_CHUNK:
1247 sctp_process_unrecog_chunk(stcb, phdr, net);
1249 case SCTP_CAUSE_UNRECOG_PARAM:
1250 sctp_process_unrecog_param(stcb, phdr);
1252 case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
1254 * We ignore this since the timer will drive out a
1255 * new cookie anyway and there timer will drive us
1256 * to send a SHUTDOWN_COMPLETE. We can't send one
1257 * here since we don't have their tag.
1260 case SCTP_CAUSE_DELETING_LAST_ADDR:
1261 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1262 case SCTP_CAUSE_DELETING_SRC_ADDR:
1264 * We should NOT get these here, but in a
1267 SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a Operational Error?<%d>?\n",
1270 case SCTP_CAUSE_OUT_OF_RESC:
1272 * And what, pray tell do we do with the fact that
1273 * the peer is out of resources? Not really sure we
1274 * could do anything but abort. I suspect this
1275 * should have came WITH an abort instead of in a
1280 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown error type = 0x%xh\n",
1284 adjust = SCTP_SIZE32(error_len);
1286 phdr = (struct sctp_paramhdr *)((caddr_t)phdr + adjust);
1288 sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, error, ch, SCTP_SO_NOT_LOCKED);
1293 sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
1294 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
1295 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
1296 struct sctp_nets *net, int *abort_no_unlock,
1297 uint8_t mflowtype, uint32_t mflowid,
1300 struct sctp_init_ack *init_ack;
1301 struct mbuf *op_err;
1303 SCTPDBG(SCTP_DEBUG_INPUT2,
1304 "sctp_handle_init_ack: handling INIT-ACK\n");
1307 SCTPDBG(SCTP_DEBUG_INPUT2,
1308 "sctp_handle_init_ack: TCB is null\n");
1311 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) {
1312 /* Invalid length */
1313 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1314 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1315 src, dst, sh, op_err,
1318 *abort_no_unlock = 1;
1321 init_ack = &cp->init;
1322 /* validate parameters */
1323 if (init_ack->initiate_tag == 0) {
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,
1330 *abort_no_unlock = 1;
1333 if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) {
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,
1340 *abort_no_unlock = 1;
1343 if (init_ack->num_inbound_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,
1350 *abort_no_unlock = 1;
1353 if (init_ack->num_outbound_streams == 0) {
1354 /* protocol error... send an abort */
1355 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1356 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1357 src, dst, sh, op_err,
1360 *abort_no_unlock = 1;
1363 /* process according to association state... */
1364 switch (stcb->asoc.state & SCTP_STATE_MASK) {
1365 case SCTP_STATE_COOKIE_WAIT:
1366 /* this is the expected state for this chunk */
1367 /* process the INIT-ACK parameters */
1368 if (stcb->asoc.primary_destination->dest_state &
1369 SCTP_ADDR_UNCONFIRMED) {
1371 * The primary is where we sent the INIT, we can
1372 * always consider it confirmed when the INIT-ACK is
1373 * returned. Do this before we load addresses
1376 stcb->asoc.primary_destination->dest_state &=
1377 ~SCTP_ADDR_UNCONFIRMED;
1378 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
1379 stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
1381 if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
1382 net, abort_no_unlock,
1385 /* error in parsing parameters */
1388 /* update our state */
1389 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
1390 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_ECHOED);
1392 /* reset the RTO calc */
1393 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1394 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1395 stcb->asoc.overall_error_count,
1397 SCTP_FROM_SCTP_INPUT,
1400 stcb->asoc.overall_error_count = 0;
1401 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
1403 * collapse the init timer back in case of a exponential
1406 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
1409 * the send at the end of the inbound data processing will
1410 * cause the cookie to be sent
1413 case SCTP_STATE_SHUTDOWN_SENT:
1414 /* incorrect state... discard */
1416 case SCTP_STATE_COOKIE_ECHOED:
1417 /* incorrect state... discard */
1419 case SCTP_STATE_OPEN:
1420 /* incorrect state... discard */
1422 case SCTP_STATE_EMPTY:
1423 case SCTP_STATE_INUSE:
1425 /* incorrect state... discard */
1429 SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
1433 static struct sctp_tcb *
1434 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1435 struct sockaddr *src, struct sockaddr *dst,
1436 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1437 struct sctp_inpcb *inp, struct sctp_nets **netp,
1438 struct sockaddr *init_src, int *notification,
1439 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1440 uint8_t mflowtype, uint32_t mflowid,
1441 uint32_t vrf_id, uint16_t port);
1445 * handle a state cookie for an existing association m: input packet mbuf
1446 * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
1447 * "split" mbuf and the cookie signature does not exist offset: offset into
1448 * mbuf to the cookie-echo chunk
1450 static struct sctp_tcb *
1451 sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
1452 struct sockaddr *src, struct sockaddr *dst,
1453 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1454 struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
1455 struct sockaddr *init_src, int *notification,
1456 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1457 uint8_t mflowtype, uint32_t mflowid,
1458 uint32_t vrf_id, uint16_t port)
1460 struct sctp_association *asoc;
1461 struct sctp_init_chunk *init_cp, init_buf;
1462 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1463 struct sctp_nets *net;
1464 struct mbuf *op_err;
1465 int init_offset, initack_offset, i;
1470 #if defined(SCTP_DETAILED_STR_STATS)
1476 /* I know that the TCB is non-NULL from the caller */
1478 for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
1479 if (asoc->cookie_how[how_indx] == 0)
1482 if (how_indx < sizeof(asoc->cookie_how)) {
1483 asoc->cookie_how[how_indx] = 1;
1485 if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1486 /* SHUTDOWN came in after sending INIT-ACK */
1487 sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
1488 op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
1489 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
1490 mflowtype, mflowid, inp->fibnum,
1492 if (how_indx < sizeof(asoc->cookie_how))
1493 asoc->cookie_how[how_indx] = 2;
1497 * find and validate the INIT chunk in the cookie (peer's info) the
1498 * INIT should start after the cookie-echo header struct (chunk
1499 * header, state cookie header struct)
1501 init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
1503 init_cp = (struct sctp_init_chunk *)
1504 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1505 (uint8_t *) & init_buf);
1506 if (init_cp == NULL) {
1507 /* could not pull a INIT chunk in cookie */
1510 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1514 * find and validate the INIT-ACK chunk in the cookie (my info) the
1515 * INIT-ACK follows the INIT chunk
1517 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1518 initack_cp = (struct sctp_init_ack_chunk *)
1519 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1520 (uint8_t *) & initack_buf);
1521 if (initack_cp == NULL) {
1522 /* could not pull INIT-ACK chunk in cookie */
1525 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1528 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1529 (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
1531 * case D in Section 5.2.4 Table 2: MMAA process accordingly
1532 * to get into the OPEN state
1534 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1536 * Opps, this means that we somehow generated two vtag's
1537 * the same. I.e. we did:
1539 * <---INIT(tag=a)------
1540 * ----INIT-ACK(tag=t)-->
1541 * ----INIT(tag=t)------> *1
1542 * <---INIT-ACK(tag=a)---
1543 * <----CE(tag=t)------------- *2
1545 * At point *1 we should be generating a different
1546 * tag t'. Which means we would throw away the CE and send
1547 * ours instead. Basically this is case C (throw away side).
1549 if (how_indx < sizeof(asoc->cookie_how))
1550 asoc->cookie_how[how_indx] = 17;
1554 switch (SCTP_GET_STATE(asoc)) {
1555 case SCTP_STATE_COOKIE_WAIT:
1556 case SCTP_STATE_COOKIE_ECHOED:
1558 * INIT was sent but got a COOKIE_ECHO with the
1559 * correct tags... just accept it...but we must
1560 * process the init so that we can make sure we have
1561 * the right seq no's.
1563 /* First we must process the INIT !! */
1564 retval = sctp_process_init(init_cp, stcb);
1566 if (how_indx < sizeof(asoc->cookie_how))
1567 asoc->cookie_how[how_indx] = 3;
1570 /* we have already processed the INIT so no problem */
1571 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp,
1573 SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
1574 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp,
1576 SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
1577 /* update current state */
1578 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)
1579 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1581 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1583 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1584 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1585 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1586 stcb->sctp_ep, stcb, asoc->primary_destination);
1588 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1589 sctp_stop_all_cookie_timers(stcb);
1590 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1591 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1592 (inp->sctp_socket->so_qlimit == 0)
1594 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1599 * Here is where collision would go if we
1600 * did a connect() and instead got a
1601 * init/init-ack/cookie done before the
1602 * init-ack came back..
1604 stcb->sctp_ep->sctp_flags |=
1605 SCTP_PCB_FLAGS_CONNECTED;
1606 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1607 so = SCTP_INP_SO(stcb->sctp_ep);
1608 atomic_add_int(&stcb->asoc.refcnt, 1);
1609 SCTP_TCB_UNLOCK(stcb);
1610 SCTP_SOCKET_LOCK(so, 1);
1611 SCTP_TCB_LOCK(stcb);
1612 atomic_add_int(&stcb->asoc.refcnt, -1);
1613 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1614 SCTP_SOCKET_UNLOCK(so, 1);
1618 soisconnected(stcb->sctp_socket);
1619 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1620 SCTP_SOCKET_UNLOCK(so, 1);
1623 /* notify upper layer */
1624 *notification = SCTP_NOTIFY_ASSOC_UP;
1626 * since we did not send a HB make sure we don't
1629 net->hb_responded = 1;
1630 net->RTO = sctp_calculate_rto(stcb, asoc, net,
1631 &cookie->time_entered,
1632 sctp_align_unsafe_makecopy,
1633 SCTP_RTT_FROM_NON_DATA);
1635 if (stcb->asoc.sctp_autoclose_ticks &&
1636 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1637 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1643 * we're in the OPEN state (or beyond), so peer must
1644 * have simply lost the COOKIE-ACK
1648 sctp_stop_all_cookie_timers(stcb);
1650 * We ignore the return code here.. not sure if we should
1651 * somehow abort.. but we do have an existing asoc. This
1652 * really should not fail.
1654 if (sctp_load_addresses_from_init(stcb, m,
1655 init_offset + sizeof(struct sctp_init_chunk),
1656 initack_offset, src, dst, init_src)) {
1657 if (how_indx < sizeof(asoc->cookie_how))
1658 asoc->cookie_how[how_indx] = 4;
1661 /* respond with a COOKIE-ACK */
1662 sctp_toss_old_cookies(stcb, asoc);
1663 sctp_send_cookie_ack(stcb);
1664 if (how_indx < sizeof(asoc->cookie_how))
1665 asoc->cookie_how[how_indx] = 5;
1668 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1669 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1670 cookie->tie_tag_my_vtag == 0 &&
1671 cookie->tie_tag_peer_vtag == 0) {
1673 * case C in Section 5.2.4 Table 2: XMOO silently discard
1675 if (how_indx < sizeof(asoc->cookie_how))
1676 asoc->cookie_how[how_indx] = 6;
1680 * If nat support, and the below and stcb is established, send back
1681 * a ABORT(colliding state) if we are established.
1683 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) &&
1684 (asoc->peer_supports_nat) &&
1685 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1686 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1687 (asoc->peer_vtag == 0)))) {
1689 * Special case - Peer's support nat. We may have two init's
1690 * that we gave out the same tag on since one was not
1691 * established.. i.e. we get INIT from host-1 behind the nat
1692 * and we respond tag-a, we get a INIT from host-2 behind
1693 * the nat and we get tag-a again. Then we bring up host-1
1694 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1695 * Now we have colliding state. We must send an abort here
1696 * with colliding state indication.
1698 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1699 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1700 mflowtype, mflowid, inp->fibnum,
1704 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1705 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1706 (asoc->peer_vtag == 0))) {
1708 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1709 * should be ok, re-accept peer info
1711 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1713 * Extension of case C. If we hit this, then the
1714 * random number generator returned the same vtag
1715 * when we first sent our INIT-ACK and when we later
1716 * sent our INIT. The side with the seq numbers that
1717 * are different will be the one that normnally
1718 * would have hit case C. This in effect "extends"
1719 * our vtags in this collision case to be 64 bits.
1720 * The same collision could occur aka you get both
1721 * vtag and seq number the same twice in a row.. but
1722 * is much less likely. If it did happen then we
1723 * would proceed through and bring up the assoc.. we
1724 * may end up with the wrong stream setup however..
1725 * which would be bad.. but there is no way to
1726 * tell.. until we send on a stream that does not
1729 if (how_indx < sizeof(asoc->cookie_how))
1730 asoc->cookie_how[how_indx] = 7;
1734 if (how_indx < sizeof(asoc->cookie_how))
1735 asoc->cookie_how[how_indx] = 8;
1736 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1737 SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1738 sctp_stop_all_cookie_timers(stcb);
1740 * since we did not send a HB make sure we don't double
1743 net->hb_responded = 1;
1744 if (stcb->asoc.sctp_autoclose_ticks &&
1745 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1746 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1749 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1750 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
1752 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1754 * Ok the peer probably discarded our data (if we
1755 * echoed a cookie+data). So anything on the
1756 * sent_queue should be marked for retransmit, we
1757 * may not get something to kick us so it COULD
1758 * still take a timeout to move these.. but it can't
1759 * hurt to mark them.
1761 struct sctp_tmit_chunk *chk;
1763 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1764 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1765 chk->sent = SCTP_DATAGRAM_RESEND;
1766 sctp_flight_size_decrease(chk);
1767 sctp_total_flight_decrease(stcb, chk);
1768 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1774 /* process the INIT info (peer's info) */
1775 retval = sctp_process_init(init_cp, stcb);
1777 if (how_indx < sizeof(asoc->cookie_how))
1778 asoc->cookie_how[how_indx] = 9;
1781 if (sctp_load_addresses_from_init(stcb, m,
1782 init_offset + sizeof(struct sctp_init_chunk),
1783 initack_offset, src, dst, init_src)) {
1784 if (how_indx < sizeof(asoc->cookie_how))
1785 asoc->cookie_how[how_indx] = 10;
1788 if ((asoc->state & SCTP_STATE_COOKIE_WAIT) ||
1789 (asoc->state & SCTP_STATE_COOKIE_ECHOED)) {
1790 *notification = SCTP_NOTIFY_ASSOC_UP;
1792 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1793 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1794 (inp->sctp_socket->so_qlimit == 0)) {
1795 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1799 stcb->sctp_ep->sctp_flags |=
1800 SCTP_PCB_FLAGS_CONNECTED;
1801 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1802 so = SCTP_INP_SO(stcb->sctp_ep);
1803 atomic_add_int(&stcb->asoc.refcnt, 1);
1804 SCTP_TCB_UNLOCK(stcb);
1805 SCTP_SOCKET_LOCK(so, 1);
1806 SCTP_TCB_LOCK(stcb);
1807 atomic_add_int(&stcb->asoc.refcnt, -1);
1808 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1809 SCTP_SOCKET_UNLOCK(so, 1);
1813 soisconnected(stcb->sctp_socket);
1814 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1815 SCTP_SOCKET_UNLOCK(so, 1);
1818 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)
1819 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1821 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1822 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1823 } else if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
1824 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1826 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1828 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1829 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1830 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1831 stcb->sctp_ep, stcb, asoc->primary_destination);
1833 sctp_stop_all_cookie_timers(stcb);
1834 sctp_toss_old_cookies(stcb, asoc);
1835 sctp_send_cookie_ack(stcb);
1838 * only if we have retrans set do we do this. What
1839 * this call does is get only the COOKIE-ACK out and
1840 * then when we return the normal call to
1841 * sctp_chunk_output will get the retrans out behind
1844 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1846 if (how_indx < sizeof(asoc->cookie_how))
1847 asoc->cookie_how[how_indx] = 11;
1851 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1852 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1853 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1854 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1855 cookie->tie_tag_peer_vtag != 0) {
1856 struct sctpasochead *head;
1858 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1863 if (asoc->peer_supports_nat) {
1865 * This is a gross gross hack. Just call the
1866 * cookie_new code since we are allowing a duplicate
1867 * association. I hope this works...
1869 return (sctp_process_cookie_new(m, iphlen, offset, src, dst,
1870 sh, cookie, cookie_len,
1871 inp, netp, init_src, notification,
1872 auth_skipped, auth_offset, auth_len,
1877 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1880 if (how_indx < sizeof(asoc->cookie_how))
1881 asoc->cookie_how[how_indx] = 12;
1882 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net,
1883 SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
1884 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1885 SCTP_FROM_SCTP_INPUT + SCTP_LOC_17);
1887 /* notify upper layer */
1888 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1889 atomic_add_int(&stcb->asoc.refcnt, 1);
1890 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_OPEN) &&
1891 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1892 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) {
1893 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1895 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
1896 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1897 } else if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) {
1898 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1900 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1901 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1902 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1903 stcb->sctp_ep, stcb, asoc->primary_destination);
1905 } else if (!(asoc->state & SCTP_STATE_SHUTDOWN_SENT)) {
1906 /* move to OPEN state, if not in SHUTDOWN_SENT */
1907 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1909 asoc->pre_open_streams =
1910 ntohs(initack_cp->init.num_outbound_streams);
1911 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1912 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1913 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1915 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1917 asoc->str_reset_seq_in = asoc->init_seq_number;
1919 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1920 if (asoc->mapping_array) {
1921 memset(asoc->mapping_array, 0,
1922 asoc->mapping_array_size);
1924 if (asoc->nr_mapping_array) {
1925 memset(asoc->nr_mapping_array, 0,
1926 asoc->mapping_array_size);
1928 SCTP_TCB_UNLOCK(stcb);
1929 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1930 so = SCTP_INP_SO(stcb->sctp_ep);
1931 SCTP_SOCKET_LOCK(so, 1);
1933 SCTP_INP_INFO_WLOCK();
1934 SCTP_INP_WLOCK(stcb->sctp_ep);
1935 SCTP_TCB_LOCK(stcb);
1936 atomic_add_int(&stcb->asoc.refcnt, -1);
1937 /* send up all the data */
1938 SCTP_TCB_SEND_LOCK(stcb);
1940 sctp_report_all_outbound(stcb, 0, 1, SCTP_SO_LOCKED);
1941 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1942 stcb->asoc.strmout[i].chunks_on_queues = 0;
1943 #if defined(SCTP_DETAILED_STR_STATS)
1944 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1945 asoc->strmout[i].abandoned_sent[j] = 0;
1946 asoc->strmout[i].abandoned_unsent[j] = 0;
1949 asoc->strmout[i].abandoned_sent[0] = 0;
1950 asoc->strmout[i].abandoned_unsent[0] = 0;
1952 stcb->asoc.strmout[i].stream_no = i;
1953 stcb->asoc.strmout[i].next_sequence_send = 0;
1954 stcb->asoc.strmout[i].last_msg_incomplete = 0;
1956 /* process the INIT-ACK info (my info) */
1957 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
1958 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1960 /* pull from vtag hash */
1961 LIST_REMOVE(stcb, sctp_asocs);
1962 /* re-insert to new vtag position */
1963 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
1964 SCTP_BASE_INFO(hashasocmark))];
1966 * put it in the bucket in the vtag hash of assoc's for the
1969 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
1971 SCTP_TCB_SEND_UNLOCK(stcb);
1972 SCTP_INP_WUNLOCK(stcb->sctp_ep);
1973 SCTP_INP_INFO_WUNLOCK();
1974 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1975 SCTP_SOCKET_UNLOCK(so, 1);
1977 asoc->total_flight = 0;
1978 asoc->total_flight_count = 0;
1979 /* process the INIT info (peer's info) */
1980 retval = sctp_process_init(init_cp, stcb);
1982 if (how_indx < sizeof(asoc->cookie_how))
1983 asoc->cookie_how[how_indx] = 13;
1988 * since we did not send a HB make sure we don't double
1991 net->hb_responded = 1;
1993 if (sctp_load_addresses_from_init(stcb, m,
1994 init_offset + sizeof(struct sctp_init_chunk),
1995 initack_offset, src, dst, init_src)) {
1996 if (how_indx < sizeof(asoc->cookie_how))
1997 asoc->cookie_how[how_indx] = 14;
2001 /* respond with a COOKIE-ACK */
2002 sctp_stop_all_cookie_timers(stcb);
2003 sctp_toss_old_cookies(stcb, asoc);
2004 sctp_send_cookie_ack(stcb);
2005 if (how_indx < sizeof(asoc->cookie_how))
2006 asoc->cookie_how[how_indx] = 15;
2010 if (how_indx < sizeof(asoc->cookie_how))
2011 asoc->cookie_how[how_indx] = 16;
2012 /* all other cases... */
2018 * handle a state cookie for a new association m: input packet mbuf chain--
2019 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
2020 * and the cookie signature does not exist offset: offset into mbuf to the
2021 * cookie-echo chunk length: length of the cookie chunk to: where the init
2022 * was from returns a new TCB
2024 static struct sctp_tcb *
2025 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
2026 struct sockaddr *src, struct sockaddr *dst,
2027 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
2028 struct sctp_inpcb *inp, struct sctp_nets **netp,
2029 struct sockaddr *init_src, int *notification,
2030 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2031 uint8_t mflowtype, uint32_t mflowid,
2032 uint32_t vrf_id, uint16_t port)
2034 struct sctp_tcb *stcb;
2035 struct sctp_init_chunk *init_cp, init_buf;
2036 struct sctp_init_ack_chunk *initack_cp, initack_buf;
2037 union sctp_sockstore store;
2038 struct sctp_association *asoc;
2039 int init_offset, initack_offset, initack_limit;
2042 uint8_t auth_chunk_buf[SCTP_PARAM_BUFFER_SIZE];
2044 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2047 so = SCTP_INP_SO(inp);
2051 * find and validate the INIT chunk in the cookie (peer's info) the
2052 * INIT should start after the cookie-echo header struct (chunk
2053 * header, state cookie header struct)
2055 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
2056 init_cp = (struct sctp_init_chunk *)
2057 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
2058 (uint8_t *) & init_buf);
2059 if (init_cp == NULL) {
2060 /* could not pull a INIT chunk in cookie */
2061 SCTPDBG(SCTP_DEBUG_INPUT1,
2062 "process_cookie_new: could not pull INIT chunk hdr\n");
2065 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
2066 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
2069 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
2071 * find and validate the INIT-ACK chunk in the cookie (my info) the
2072 * INIT-ACK follows the INIT chunk
2074 initack_cp = (struct sctp_init_ack_chunk *)
2075 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
2076 (uint8_t *) & initack_buf);
2077 if (initack_cp == NULL) {
2078 /* could not pull INIT-ACK chunk in cookie */
2079 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
2082 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
2086 * NOTE: We can't use the INIT_ACK's chk_length to determine the
2087 * "initack_limit" value. This is because the chk_length field
2088 * includes the length of the cookie, but the cookie is omitted when
2089 * the INIT and INIT_ACK are tacked onto the cookie...
2091 initack_limit = offset + cookie_len;
2094 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2099 * Here we do a trick, we set in NULL for the proc/thread argument.
2100 * We do this since in effect we only use the p argument when the
2101 * socket is unbound and we must do an implicit bind. Since we are
2102 * getting a cookie, we cannot be unbound.
2104 stcb = sctp_aloc_assoc(inp, init_src, &error,
2105 ntohl(initack_cp->init.initiate_tag), vrf_id,
2106 (struct thread *)NULL
2109 struct mbuf *op_err;
2111 /* memory problem? */
2112 SCTPDBG(SCTP_DEBUG_INPUT1,
2113 "process_cookie_new: no room for another TCB!\n");
2114 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2115 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2116 src, dst, sh, op_err,
2121 /* get the correct sctp_nets */
2123 *netp = sctp_findnet(stcb, init_src);
2126 /* get scope variables out of cookie */
2127 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2128 asoc->scope.site_scope = cookie->site_scope;
2129 asoc->scope.local_scope = cookie->local_scope;
2130 asoc->scope.loopback_scope = cookie->loopback_scope;
2132 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2133 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2134 struct mbuf *op_err;
2137 * Houston we have a problem. The EP changed while the
2138 * cookie was in flight. Only recourse is to abort the
2141 atomic_add_int(&stcb->asoc.refcnt, 1);
2142 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2143 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2144 src, dst, sh, op_err,
2147 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2148 SCTP_TCB_UNLOCK(stcb);
2149 SCTP_SOCKET_LOCK(so, 1);
2150 SCTP_TCB_LOCK(stcb);
2152 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2153 SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2154 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2155 SCTP_SOCKET_UNLOCK(so, 1);
2157 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2160 /* process the INIT-ACK info (my info) */
2161 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2162 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2163 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
2164 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
2165 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
2166 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
2167 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
2168 asoc->str_reset_seq_in = asoc->init_seq_number;
2170 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
2172 /* process the INIT info (peer's info) */
2174 retval = sctp_process_init(init_cp, stcb);
2178 atomic_add_int(&stcb->asoc.refcnt, 1);
2179 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2180 SCTP_TCB_UNLOCK(stcb);
2181 SCTP_SOCKET_LOCK(so, 1);
2182 SCTP_TCB_LOCK(stcb);
2184 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2185 SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2186 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2187 SCTP_SOCKET_UNLOCK(so, 1);
2189 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2192 /* load all addresses */
2193 if (sctp_load_addresses_from_init(stcb, m,
2194 init_offset + sizeof(struct sctp_init_chunk), initack_offset,
2195 src, dst, init_src)) {
2196 atomic_add_int(&stcb->asoc.refcnt, 1);
2197 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2198 SCTP_TCB_UNLOCK(stcb);
2199 SCTP_SOCKET_LOCK(so, 1);
2200 SCTP_TCB_LOCK(stcb);
2202 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2203 SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2204 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2205 SCTP_SOCKET_UNLOCK(so, 1);
2207 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2211 * verify any preceding AUTH chunk that was skipped
2213 /* pull the local authentication parameters from the cookie/init-ack */
2214 sctp_auth_get_cookie_params(stcb, m,
2215 initack_offset + sizeof(struct sctp_init_ack_chunk),
2216 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2218 struct sctp_auth_chunk *auth;
2220 auth = (struct sctp_auth_chunk *)
2221 sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2222 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2223 /* auth HMAC failed, dump the assoc and packet */
2224 SCTPDBG(SCTP_DEBUG_AUTH1,
2225 "COOKIE-ECHO: AUTH failed\n");
2226 atomic_add_int(&stcb->asoc.refcnt, 1);
2227 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2228 SCTP_TCB_UNLOCK(stcb);
2229 SCTP_SOCKET_LOCK(so, 1);
2230 SCTP_TCB_LOCK(stcb);
2232 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2233 SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
2234 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2235 SCTP_SOCKET_UNLOCK(so, 1);
2237 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2240 /* remaining chunks checked... good to go */
2241 stcb->asoc.authenticated = 1;
2244 /* update current state */
2245 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2246 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
2247 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2248 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2249 stcb->sctp_ep, stcb, asoc->primary_destination);
2251 sctp_stop_all_cookie_timers(stcb);
2252 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2253 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2256 * if we're doing ASCONFs, check to see if we have any new local
2257 * addresses that need to get added to the peer (eg. addresses
2258 * changed while cookie echo in flight). This needs to be done
2259 * after we go to the OPEN state to do the correct asconf
2260 * processing. else, make sure we have the correct addresses in our
2264 /* warning, we re-use sin, sin6, sa_store here! */
2265 /* pull in local_address (our "from" address) */
2266 switch (cookie->laddr_type) {
2268 case SCTP_IPV4_ADDRESS:
2269 /* source addr is IPv4 */
2270 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2271 store.sin.sin_family = AF_INET;
2272 store.sin.sin_len = sizeof(struct sockaddr_in);
2273 store.sin.sin_addr.s_addr = cookie->laddress[0];
2277 case SCTP_IPV6_ADDRESS:
2278 /* source addr is IPv6 */
2279 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2280 store.sin6.sin6_family = AF_INET6;
2281 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2282 store.sin6.sin6_scope_id = cookie->scope_id;
2283 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2287 atomic_add_int(&stcb->asoc.refcnt, 1);
2288 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2289 SCTP_TCB_UNLOCK(stcb);
2290 SCTP_SOCKET_LOCK(so, 1);
2291 SCTP_TCB_LOCK(stcb);
2293 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2294 SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
2295 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2296 SCTP_SOCKET_UNLOCK(so, 1);
2298 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2302 /* set up to notify upper layer */
2303 *notification = SCTP_NOTIFY_ASSOC_UP;
2304 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2305 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2306 (inp->sctp_socket->so_qlimit == 0)) {
2308 * This is an endpoint that called connect() how it got a
2309 * cookie that is NEW is a bit of a mystery. It must be that
2310 * the INIT was sent, but before it got there.. a complete
2311 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2312 * should have went to the other code.. not here.. oh well..
2313 * a bit of protection is worth having..
2315 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2316 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2317 atomic_add_int(&stcb->asoc.refcnt, 1);
2318 SCTP_TCB_UNLOCK(stcb);
2319 SCTP_SOCKET_LOCK(so, 1);
2320 SCTP_TCB_LOCK(stcb);
2321 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2322 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2323 SCTP_SOCKET_UNLOCK(so, 1);
2327 soisconnected(stcb->sctp_socket);
2328 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2329 SCTP_SOCKET_UNLOCK(so, 1);
2331 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2332 (inp->sctp_socket->so_qlimit)) {
2334 * We don't want to do anything with this one. Since it is
2335 * the listening guy. The timer will get started for
2336 * accepted connections in the caller.
2340 /* since we did not send a HB make sure we don't double things */
2341 if ((netp) && (*netp))
2342 (*netp)->hb_responded = 1;
2344 if (stcb->asoc.sctp_autoclose_ticks &&
2345 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2346 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2348 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2349 if ((netp) && (*netp)) {
2350 /* calculate the RTT and set the encaps port */
2351 (*netp)->RTO = sctp_calculate_rto(stcb, asoc, *netp,
2352 &cookie->time_entered, sctp_align_unsafe_makecopy,
2353 SCTP_RTT_FROM_NON_DATA);
2354 (*netp)->port = port;
2356 /* respond with a COOKIE-ACK */
2357 sctp_send_cookie_ack(stcb);
2360 * check the address lists for any ASCONFs that need to be sent
2361 * AFTER the cookie-ack is sent
2363 sctp_check_address_list(stcb, m,
2364 initack_offset + sizeof(struct sctp_init_ack_chunk),
2365 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2366 &store.sa, cookie->local_scope, cookie->site_scope,
2367 cookie->ipv4_scope, cookie->loopback_scope);
2374 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2375 * we NEED to make sure we are not already using the vtag. If so we
2376 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2377 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2378 SCTP_BASE_INFO(hashasocmark))];
2379 LIST_FOREACH(stcb, head, sctp_asocs) {
2380 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2381 -- SEND ABORT - TRY AGAIN --
2387 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2388 * existing (non-NULL) TCB
2390 static struct mbuf *
2391 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2392 struct sockaddr *src, struct sockaddr *dst,
2393 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2394 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2395 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2396 struct sctp_tcb **locked_tcb,
2397 uint8_t mflowtype, uint32_t mflowid,
2398 uint32_t vrf_id, uint16_t port)
2400 struct sctp_state_cookie *cookie;
2401 struct sctp_tcb *l_stcb = *stcb;
2402 struct sctp_inpcb *l_inp;
2403 struct sockaddr *to;
2404 struct sctp_pcb *ep;
2406 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2408 uint8_t cookie_ok = 0;
2409 unsigned int sig_offset, cookie_offset;
2410 unsigned int cookie_len;
2412 struct timeval time_expires;
2413 int notification = 0;
2414 struct sctp_nets *netl;
2415 int had_a_existing_tcb = 0;
2416 int send_int_conf = 0;
2419 struct sockaddr_in sin;
2423 struct sockaddr_in6 sin6;
2427 SCTPDBG(SCTP_DEBUG_INPUT2,
2428 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2430 if (inp_p == NULL) {
2433 cookie = &cp->cookie;
2434 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2435 cookie_len = ntohs(cp->ch.chunk_length);
2437 if ((cookie->peerport != sh->src_port) &&
2438 (cookie->myport != sh->dest_port) &&
2439 (cookie->my_vtag != sh->v_tag)) {
2441 * invalid ports or bad tag. Note that we always leave the
2442 * v_tag in the header in network order and when we stored
2443 * it in the my_vtag slot we also left it in network order.
2444 * This maintains the match even though it may be in the
2445 * opposite byte order of the machine :->
2449 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2450 sizeof(struct sctp_init_chunk) +
2451 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2452 /* cookie too small */
2456 * split off the signature into its own mbuf (since it should not be
2457 * calculated in the sctp_hmac_m() call).
2459 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2460 m_sig = m_split(m, sig_offset, M_NOWAIT);
2461 if (m_sig == NULL) {
2462 /* out of memory or ?? */
2465 #ifdef SCTP_MBUF_LOGGING
2466 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2467 sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
2472 * compute the signature/digest for the cookie
2474 ep = &(*inp_p)->sctp_ep;
2477 SCTP_TCB_UNLOCK(l_stcb);
2479 SCTP_INP_RLOCK(l_inp);
2481 SCTP_TCB_LOCK(l_stcb);
2483 /* which cookie is it? */
2484 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2485 (ep->current_secret_number != ep->last_secret_number)) {
2486 /* it's the old cookie */
2487 (void)sctp_hmac_m(SCTP_HMAC,
2488 (uint8_t *) ep->secret_key[(int)ep->last_secret_number],
2489 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2491 /* it's the current cookie */
2492 (void)sctp_hmac_m(SCTP_HMAC,
2493 (uint8_t *) ep->secret_key[(int)ep->current_secret_number],
2494 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2496 /* get the signature */
2497 SCTP_INP_RUNLOCK(l_inp);
2498 sig = (uint8_t *) sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *) & tmp_sig);
2500 /* couldn't find signature */
2501 sctp_m_freem(m_sig);
2504 /* compare the received digest with the computed digest */
2505 if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2506 /* try the old cookie? */
2507 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2508 (ep->current_secret_number != ep->last_secret_number)) {
2509 /* compute digest with old */
2510 (void)sctp_hmac_m(SCTP_HMAC,
2511 (uint8_t *) ep->secret_key[(int)ep->last_secret_number],
2512 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2514 if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2522 * Now before we continue we must reconstruct our mbuf so that
2523 * normal processing of any other chunks will work.
2529 while (SCTP_BUF_NEXT(m_at) != NULL) {
2530 m_at = SCTP_BUF_NEXT(m_at);
2532 SCTP_BUF_NEXT(m_at) = m_sig;
2535 if (cookie_ok == 0) {
2536 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2537 SCTPDBG(SCTP_DEBUG_INPUT2,
2538 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2539 (uint32_t) offset, cookie_offset, sig_offset);
2543 * check the cookie timestamps to be sure it's not stale
2545 (void)SCTP_GETTIME_TIMEVAL(&now);
2546 /* Expire time is in Ticks, so we convert to seconds */
2547 time_expires.tv_sec = cookie->time_entered.tv_sec + TICKS_TO_SEC(cookie->cookie_life);
2548 time_expires.tv_usec = cookie->time_entered.tv_usec;
2550 * TODO sctp_constants.h needs alternative time macros when _KERNEL
2553 if (timevalcmp(&now, &time_expires, >)) {
2554 /* cookie is stale! */
2555 struct mbuf *op_err;
2556 struct sctp_stale_cookie_msg *scm;
2559 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_stale_cookie_msg),
2560 0, M_NOWAIT, 1, MT_DATA);
2561 if (op_err == NULL) {
2566 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_stale_cookie_msg);
2567 scm = mtod(op_err, struct sctp_stale_cookie_msg *);
2568 scm->ph.param_type = htons(SCTP_CAUSE_STALE_COOKIE);
2569 scm->ph.param_length = htons((sizeof(struct sctp_paramhdr) +
2570 (sizeof(uint32_t))));
2571 /* seconds to usec */
2572 tim = (now.tv_sec - time_expires.tv_sec) * 1000000;
2575 tim = now.tv_usec - cookie->time_entered.tv_usec;
2576 scm->time_usec = htonl(tim);
2577 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2578 mflowtype, mflowid, l_inp->fibnum,
2583 * Now we must see with the lookup address if we have an existing
2584 * asoc. This will only happen if we were in the COOKIE-WAIT state
2585 * and a INIT collided with us and somewhere the peer sent the
2586 * cookie on another address besides the single address our assoc
2587 * had for him. In this case we will have one of the tie-tags set at
2588 * least AND the address field in the cookie can be used to look it
2592 switch (cookie->addr_type) {
2594 case SCTP_IPV6_ADDRESS:
2595 memset(&sin6, 0, sizeof(sin6));
2596 sin6.sin6_family = AF_INET6;
2597 sin6.sin6_len = sizeof(sin6);
2598 sin6.sin6_port = sh->src_port;
2599 sin6.sin6_scope_id = cookie->scope_id;
2600 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2601 sizeof(sin6.sin6_addr.s6_addr));
2602 to = (struct sockaddr *)&sin6;
2606 case SCTP_IPV4_ADDRESS:
2607 memset(&sin, 0, sizeof(sin));
2608 sin.sin_family = AF_INET;
2609 sin.sin_len = sizeof(sin);
2610 sin.sin_port = sh->src_port;
2611 sin.sin_addr.s_addr = cookie->address[0];
2612 to = (struct sockaddr *)&sin;
2616 /* This should not happen */
2619 if (*stcb == NULL) {
2620 /* Yep, lets check */
2621 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2622 if (*stcb == NULL) {
2624 * We should have only got back the same inp. If we
2625 * got back a different ep we have a problem. The
2626 * original findep got back l_inp and now
2628 if (l_inp != *inp_p) {
2629 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2632 if (*locked_tcb == NULL) {
2634 * In this case we found the assoc only
2635 * after we locked the create lock. This
2636 * means we are in a colliding case and we
2637 * must make sure that we unlock the tcb if
2638 * its one of the cases where we throw away
2639 * the incoming packets.
2641 *locked_tcb = *stcb;
2644 * We must also increment the inp ref count
2645 * since the ref_count flags was set when we
2646 * did not find the TCB, now we found it
2647 * which reduces the refcount.. we must
2648 * raise it back out to balance it all :-)
2650 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2651 if ((*stcb)->sctp_ep != l_inp) {
2652 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2653 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2658 cookie_len -= SCTP_SIGNATURE_SIZE;
2659 if (*stcb == NULL) {
2660 /* this is the "normal" case... get a new TCB */
2661 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2662 cookie, cookie_len, *inp_p,
2663 netp, to, ¬ification,
2664 auth_skipped, auth_offset, auth_len,
2668 /* this is abnormal... cookie-echo on existing TCB */
2669 had_a_existing_tcb = 1;
2670 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2672 cookie, cookie_len, *inp_p, *stcb, netp, to,
2673 ¬ification, auth_skipped, auth_offset, auth_len,
2678 if (*stcb == NULL) {
2679 /* still no TCB... must be bad cookie-echo */
2682 if (*netp != NULL) {
2683 (*netp)->flowtype = mflowtype;
2684 (*netp)->flowid = mflowid;
2687 * Ok, we built an association so confirm the address we sent the
2690 netl = sctp_findnet(*stcb, to);
2692 * This code should in theory NOT run but
2695 /* TSNH! Huh, why do I need to add this address here? */
2696 if (sctp_add_remote_addr(*stcb, to, NULL, SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2699 netl = sctp_findnet(*stcb, to);
2702 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2703 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2704 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2709 sctp_start_net_timers(*stcb);
2710 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2711 if (!had_a_existing_tcb ||
2712 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2714 * If we have a NEW cookie or the connect never
2715 * reached the connected state during collision we
2716 * must do the TCP accept thing.
2718 struct socket *so, *oso;
2719 struct sctp_inpcb *inp;
2721 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2723 * For a restart we will keep the same
2724 * socket, no need to do anything. I THINK!!
2726 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2727 if (send_int_conf) {
2728 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2729 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2733 oso = (*inp_p)->sctp_socket;
2734 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2735 SCTP_TCB_UNLOCK((*stcb));
2736 CURVNET_SET(oso->so_vnet);
2737 so = sonewconn(oso, 0
2740 SCTP_TCB_LOCK((*stcb));
2741 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2744 struct mbuf *op_err;
2746 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2747 struct socket *pcb_so;
2750 /* Too many sockets */
2751 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2752 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2753 sctp_abort_association(*inp_p, NULL, m, iphlen,
2754 src, dst, sh, op_err,
2757 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2758 pcb_so = SCTP_INP_SO(*inp_p);
2759 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2760 SCTP_TCB_UNLOCK((*stcb));
2761 SCTP_SOCKET_LOCK(pcb_so, 1);
2762 SCTP_TCB_LOCK((*stcb));
2763 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2765 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2766 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2767 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2768 SCTP_SOCKET_UNLOCK(pcb_so, 1);
2772 inp = (struct sctp_inpcb *)so->so_pcb;
2773 SCTP_INP_INCR_REF(inp);
2775 * We add the unbound flag here so that if we get an
2776 * soabort() before we get the move_pcb done, we
2777 * will properly cleanup.
2779 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2780 SCTP_PCB_FLAGS_CONNECTED |
2781 SCTP_PCB_FLAGS_IN_TCPPOOL |
2782 SCTP_PCB_FLAGS_UNBOUND |
2783 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2784 SCTP_PCB_FLAGS_DONT_WAKE);
2785 inp->sctp_features = (*inp_p)->sctp_features;
2786 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2787 inp->sctp_socket = so;
2788 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2789 inp->max_cwnd = (*inp_p)->max_cwnd;
2790 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2791 inp->ecn_supported = (*inp_p)->ecn_supported;
2792 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2793 inp->auth_supported = (*inp_p)->auth_supported;
2794 inp->asconf_supported = (*inp_p)->asconf_supported;
2795 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2796 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2797 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2798 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2799 inp->sctp_context = (*inp_p)->sctp_context;
2800 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2801 inp->fibnum = (*inp_p)->fibnum;
2802 inp->inp_starting_point_for_iterator = NULL;
2804 * copy in the authentication parameters from the
2807 if (inp->sctp_ep.local_hmacs)
2808 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2809 inp->sctp_ep.local_hmacs =
2810 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2811 if (inp->sctp_ep.local_auth_chunks)
2812 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2813 inp->sctp_ep.local_auth_chunks =
2814 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2817 * Now we must move it from one hash table to
2818 * another and get the tcb in the right place.
2822 * This is where the one-2-one socket is put into
2823 * the accept state waiting for the accept!
2826 (*stcb)->asoc.state |= SCTP_STATE_IN_ACCEPT_QUEUE;
2828 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2830 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2831 SCTP_TCB_UNLOCK((*stcb));
2833 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2835 SCTP_TCB_LOCK((*stcb));
2836 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2840 * now we must check to see if we were aborted while
2841 * the move was going on and the lock/unlock
2844 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2846 * yep it was, we leave the assoc attached
2847 * to the socket since the sctp_inpcb_free()
2848 * call will send an abort for us.
2850 SCTP_INP_DECR_REF(inp);
2853 SCTP_INP_DECR_REF(inp);
2854 /* Switch over to the new guy */
2856 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2857 if (send_int_conf) {
2858 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2859 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2862 * Pull it from the incomplete queue and wake the
2865 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2866 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2867 SCTP_TCB_UNLOCK((*stcb));
2868 SCTP_SOCKET_LOCK(so, 1);
2871 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2872 SCTP_TCB_LOCK((*stcb));
2873 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2874 SCTP_SOCKET_UNLOCK(so, 1);
2880 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2882 if (send_int_conf) {
2883 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2884 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2890 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2891 struct sctp_tcb *stcb, struct sctp_nets *net)
2893 /* cp must not be used, others call this without a c-ack :-) */
2894 struct sctp_association *asoc;
2896 SCTPDBG(SCTP_DEBUG_INPUT2,
2897 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2898 if ((stcb == NULL) || (net == NULL)) {
2903 sctp_stop_all_cookie_timers(stcb);
2904 /* process according to association state */
2905 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) {
2906 /* state change only needed when I am in right state */
2907 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2908 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
2909 sctp_start_net_timers(stcb);
2910 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2911 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2912 stcb->sctp_ep, stcb, asoc->primary_destination);
2916 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2917 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2918 if (asoc->overall_error_count == 0) {
2919 net->RTO = sctp_calculate_rto(stcb, asoc, net,
2920 &asoc->time_entered, sctp_align_safe_nocopy,
2921 SCTP_RTT_FROM_NON_DATA);
2923 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2924 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2925 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2926 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2927 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2931 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2932 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2933 so = SCTP_INP_SO(stcb->sctp_ep);
2934 atomic_add_int(&stcb->asoc.refcnt, 1);
2935 SCTP_TCB_UNLOCK(stcb);
2936 SCTP_SOCKET_LOCK(so, 1);
2937 SCTP_TCB_LOCK(stcb);
2938 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2940 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
2941 soisconnected(stcb->sctp_socket);
2943 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2944 SCTP_SOCKET_UNLOCK(so, 1);
2948 * since we did not send a HB make sure we don't double
2951 net->hb_responded = 1;
2953 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2955 * We don't need to do the asconf thing, nor hb or
2956 * autoclose if the socket is closed.
2960 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
2964 if (stcb->asoc.sctp_autoclose_ticks &&
2965 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2966 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
2967 stcb->sctp_ep, stcb, NULL);
2970 * send ASCONF if parameters are pending and ASCONFs are
2971 * allowed (eg. addresses changed when init/cookie echo were
2974 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
2975 (stcb->asoc.asconf_supported == 1) &&
2976 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
2977 #ifdef SCTP_TIMER_BASED_ASCONF
2978 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2979 stcb->sctp_ep, stcb,
2980 stcb->asoc.primary_destination);
2982 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2983 SCTP_ADDR_NOT_LOCKED);
2988 /* Toss the cookie if I can */
2989 sctp_toss_old_cookies(stcb, asoc);
2990 if (!TAILQ_EMPTY(&asoc->sent_queue)) {
2991 /* Restart the timer if we have pending data */
2992 struct sctp_tmit_chunk *chk;
2994 chk = TAILQ_FIRST(&asoc->sent_queue);
2995 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
3000 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
3001 struct sctp_tcb *stcb)
3003 struct sctp_nets *net;
3004 struct sctp_tmit_chunk *lchk;
3005 struct sctp_ecne_chunk bkup;
3006 uint8_t override_bit;
3007 uint32_t tsn, window_data_tsn;
3009 unsigned int pkt_cnt;
3011 len = ntohs(cp->ch.chunk_length);
3012 if ((len != sizeof(struct sctp_ecne_chunk)) &&
3013 (len != sizeof(struct old_sctp_ecne_chunk))) {
3016 if (len == sizeof(struct old_sctp_ecne_chunk)) {
3017 /* Its the old format */
3018 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
3019 bkup.num_pkts_since_cwr = htonl(1);
3022 SCTP_STAT_INCR(sctps_recvecne);
3023 tsn = ntohl(cp->tsn);
3024 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
3025 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
3027 window_data_tsn = stcb->asoc.sending_seq - 1;
3029 window_data_tsn = lchk->rec.data.TSN_seq;
3032 /* Find where it was sent to if possible. */
3034 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
3035 if (lchk->rec.data.TSN_seq == tsn) {
3037 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
3040 if (SCTP_TSN_GT(lchk->rec.data.TSN_seq, tsn)) {
3046 * What to do. A previous send of a CWR was possibly lost.
3047 * See how old it is, we may have it marked on the actual
3050 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3051 if (tsn == net->last_cwr_tsn) {
3052 /* Found him, send it off */
3058 * If we reach here, we need to send a special CWR
3059 * that says hey, we did this a long time ago and
3060 * you lost the response.
3062 net = TAILQ_FIRST(&stcb->asoc.nets);
3067 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
3074 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
3075 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3077 * JRS - Use the congestion control given in the pluggable
3080 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
3082 * We reduce once every RTT. So we will only lower cwnd at
3083 * the next sending seq i.e. the window_data_tsn
3085 net->cwr_window_tsn = window_data_tsn;
3086 net->ecn_ce_pkt_cnt += pkt_cnt;
3087 net->lost_cnt = pkt_cnt;
3088 net->last_cwr_tsn = tsn;
3090 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
3091 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
3092 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3094 * Another loss in the same window update how many
3095 * marks/packets lost we have had.
3099 if (pkt_cnt > net->lost_cnt) {
3100 /* Should be the case */
3101 cnt = (pkt_cnt - net->lost_cnt);
3102 net->ecn_ce_pkt_cnt += cnt;
3104 net->lost_cnt = pkt_cnt;
3105 net->last_cwr_tsn = tsn;
3107 * Most CC functions will ignore this call, since we
3108 * are in-window yet of the initial CE the peer saw.
3110 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
3114 * We always send a CWR this way if our previous one was lost our
3115 * peer will get an update, or if it is not time again to reduce we
3116 * still get the cwr to the peer. Note we set the override when we
3117 * could not find the TSN on the chunk or the destination network.
3119 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
3123 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
3126 * Here we get a CWR from the peer. We must look in the outqueue and
3127 * make sure that we have a covered ECNE in the control chunk part.
3130 struct sctp_tmit_chunk *chk;
3131 struct sctp_ecne_chunk *ecne;
3135 cwr_tsn = ntohl(cp->tsn);
3136 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
3137 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
3138 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
3141 if ((override == 0) && (chk->whoTo != net)) {
3142 /* Must be from the right src unless override is set */
3145 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
3146 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
3147 /* this covers this ECNE, we can remove it */
3148 stcb->asoc.ecn_echo_cnt_onq--;
3149 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
3151 sctp_m_freem(chk->data);
3153 stcb->asoc.ctrl_queue_cnt--;
3154 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3155 if (override == 0) {
3163 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3164 struct sctp_tcb *stcb, struct sctp_nets *net)
3166 struct sctp_association *asoc;
3168 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3173 SCTPDBG(SCTP_DEBUG_INPUT2,
3174 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3179 /* process according to association state */
3180 if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3181 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3182 SCTPDBG(SCTP_DEBUG_INPUT2,
3183 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3184 SCTP_TCB_UNLOCK(stcb);
3187 /* notify upper layer protocol */
3188 if (stcb->sctp_socket) {
3189 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3192 if (!TAILQ_EMPTY(&asoc->send_queue) ||
3193 !TAILQ_EMPTY(&asoc->sent_queue) ||
3194 !stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
3195 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3198 /* stop the timer */
3199 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3200 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3201 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3203 SCTPDBG(SCTP_DEBUG_INPUT2,
3204 "sctp_handle_shutdown_complete: calls free-asoc\n");
3205 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3206 so = SCTP_INP_SO(stcb->sctp_ep);
3207 atomic_add_int(&stcb->asoc.refcnt, 1);
3208 SCTP_TCB_UNLOCK(stcb);
3209 SCTP_SOCKET_LOCK(so, 1);
3210 SCTP_TCB_LOCK(stcb);
3211 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3213 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3214 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3215 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3216 SCTP_SOCKET_UNLOCK(so, 1);
3222 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3223 struct sctp_nets *net, uint8_t flg)
3225 switch (desc->chunk_type) {
3227 /* find the tsn to resend (possibly */
3230 struct sctp_tmit_chunk *tp1;
3232 tsn = ntohl(desc->tsn_ifany);
3233 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3234 if (tp1->rec.data.TSN_seq == tsn) {
3238 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, tsn)) {
3246 * Do it the other way , aka without paying
3247 * attention to queue seq order.
3249 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3250 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3251 if (tp1->rec.data.TSN_seq == tsn) {
3258 SCTP_STAT_INCR(sctps_pdrptsnnf);
3260 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3263 if (((flg & SCTP_BADCRC) == 0) &&
3264 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3267 if ((stcb->asoc.peers_rwnd == 0) &&
3268 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3269 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3272 if (stcb->asoc.peers_rwnd == 0 &&
3273 (flg & SCTP_FROM_MIDDLE_BOX)) {
3274 SCTP_STAT_INCR(sctps_pdrpdizrw);
3277 ddp = (uint8_t *) (mtod(tp1->data, caddr_t)+
3278 sizeof(struct sctp_data_chunk));
3282 for (iii = 0; iii < sizeof(desc->data_bytes);
3284 if (ddp[iii] != desc->data_bytes[iii]) {
3285 SCTP_STAT_INCR(sctps_pdrpbadd);
3293 * this guy had a RTO calculation
3294 * pending on it, cancel it
3296 if (tp1->whoTo->rto_needed == 0) {
3297 tp1->whoTo->rto_needed = 1;
3301 SCTP_STAT_INCR(sctps_pdrpmark);
3302 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3303 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3305 * mark it as if we were doing a FR, since
3306 * we will be getting gap ack reports behind
3307 * the info from the router.
3309 tp1->rec.data.doing_fast_retransmit = 1;
3311 * mark the tsn with what sequences can
3314 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3315 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3317 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq;
3320 /* restart the timer */
3321 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3323 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3324 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3327 /* fix counts and things */
3328 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3329 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3330 tp1->whoTo->flight_size,
3333 tp1->rec.data.TSN_seq);
3335 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3336 sctp_flight_size_decrease(tp1);
3337 sctp_total_flight_decrease(stcb, tp1);
3339 tp1->sent = SCTP_DATAGRAM_RESEND;
3345 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3346 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3349 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3351 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3354 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3355 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3356 audit, stcb->asoc.sent_queue_retran_cnt);
3357 #ifndef SCTP_AUDITING_ENABLED
3358 stcb->asoc.sent_queue_retran_cnt = audit;
3366 struct sctp_tmit_chunk *asconf;
3368 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3370 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3375 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3376 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3377 asconf->sent = SCTP_DATAGRAM_RESEND;
3378 asconf->snd_count--;
3382 case SCTP_INITIATION:
3383 /* resend the INIT */
3384 stcb->asoc.dropped_special_cnt++;
3385 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3387 * If we can get it in, in a few attempts we do
3388 * this, otherwise we let the timer fire.
3390 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3392 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3393 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3396 case SCTP_SELECTIVE_ACK:
3397 case SCTP_NR_SELECTIVE_ACK:
3398 /* resend the sack */
3399 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3401 case SCTP_HEARTBEAT_REQUEST:
3402 /* resend a demand HB */
3403 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3405 * Only retransmit if we KNOW we wont destroy the
3408 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3412 sctp_send_shutdown(stcb, net);
3414 case SCTP_SHUTDOWN_ACK:
3415 sctp_send_shutdown_ack(stcb, net);
3417 case SCTP_COOKIE_ECHO:
3419 struct sctp_tmit_chunk *cookie;
3422 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3424 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3429 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3430 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3431 cookie->sent = SCTP_DATAGRAM_RESEND;
3432 sctp_stop_all_cookie_timers(stcb);
3436 case SCTP_COOKIE_ACK:
3437 sctp_send_cookie_ack(stcb);
3439 case SCTP_ASCONF_ACK:
3440 /* resend last asconf ack */
3441 sctp_send_asconf_ack(stcb);
3443 case SCTP_FORWARD_CUM_TSN:
3444 send_forward_tsn(stcb, &stcb->asoc);
3446 /* can't do anything with these */
3447 case SCTP_PACKET_DROPPED:
3448 case SCTP_INITIATION_ACK: /* this should not happen */
3449 case SCTP_HEARTBEAT_ACK:
3450 case SCTP_ABORT_ASSOCIATION:
3451 case SCTP_OPERATION_ERROR:
3452 case SCTP_SHUTDOWN_COMPLETE:
3462 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t * list)
3468 * We set things to 0xffff since this is the last delivered sequence
3469 * and we will be sending in 0 after the reset.
3472 if (number_entries) {
3473 for (i = 0; i < number_entries; i++) {
3474 temp = ntohs(list[i]);
3475 if (temp >= stcb->asoc.streamincnt) {
3478 stcb->asoc.strmin[temp].last_sequence_delivered = 0xffff;
3482 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3483 stcb->asoc.strmin[i].last_sequence_delivered = 0xffff;
3486 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3490 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t * list)
3495 if (number_entries > 0) {
3496 for (i = 0; i < number_entries; i++) {
3497 temp = ntohs(list[i]);
3498 if (temp >= stcb->asoc.streamoutcnt) {
3499 /* no such stream */
3502 stcb->asoc.strmout[temp].next_sequence_send = 0;
3505 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3506 stcb->asoc.strmout[i].next_sequence_send = 0;
3509 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3513 sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t * list)
3518 if (number_entries > 0) {
3519 for (i = 0; i < number_entries; i++) {
3520 temp = ntohs(list[i]);
3521 if (temp >= stcb->asoc.streamoutcnt) {
3522 /* no such stream */
3525 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3528 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3529 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3535 struct sctp_stream_reset_request *
3536 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3538 struct sctp_association *asoc;
3539 struct sctp_chunkhdr *ch;
3540 struct sctp_stream_reset_request *r;
3541 struct sctp_tmit_chunk *chk;
3545 if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
3546 asoc->stream_reset_outstanding = 0;
3549 if (stcb->asoc.str_reset == NULL) {
3550 asoc->stream_reset_outstanding = 0;
3553 chk = stcb->asoc.str_reset;
3554 if (chk->data == NULL) {
3558 /* he wants a copy of the chk pointer */
3561 clen = chk->send_size;
3562 ch = mtod(chk->data, struct sctp_chunkhdr *);
3563 r = (struct sctp_stream_reset_request *)(ch + 1);
3564 if (ntohl(r->request_seq) == seq) {
3568 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3569 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3570 /* move to the next one, there can only be a max of two */
3571 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3572 if (ntohl(r->request_seq) == seq) {
3576 /* that seq is not here */
3581 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3583 struct sctp_association *asoc;
3584 struct sctp_tmit_chunk *chk = stcb->asoc.str_reset;
3586 if (stcb->asoc.str_reset == NULL) {
3591 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3592 chk->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3593 TAILQ_REMOVE(&asoc->control_send_queue,
3597 sctp_m_freem(chk->data);
3600 asoc->ctrl_queue_cnt--;
3601 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3602 /* sa_ignore NO_NULL_CHK */
3603 stcb->asoc.str_reset = NULL;
3608 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3609 uint32_t seq, uint32_t action,
3610 struct sctp_stream_reset_response *respin)
3614 struct sctp_association *asoc = &stcb->asoc;
3615 struct sctp_tmit_chunk *chk;
3616 struct sctp_stream_reset_request *req_param;
3617 struct sctp_stream_reset_out_request *req_out_param;
3618 struct sctp_stream_reset_in_request *req_in_param;
3619 uint32_t number_entries;
3621 if (asoc->stream_reset_outstanding == 0) {
3625 if (seq == stcb->asoc.str_reset_seq_out) {
3626 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3627 if (req_param != NULL) {
3628 stcb->asoc.str_reset_seq_out++;
3629 type = ntohs(req_param->ph.param_type);
3630 lparm_len = ntohs(req_param->ph.param_length);
3631 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3634 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3635 number_entries = (lparm_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3636 asoc->stream_reset_out_is_outstanding = 0;
3637 if (asoc->stream_reset_outstanding)
3638 asoc->stream_reset_outstanding--;
3639 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3641 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3642 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3643 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3644 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3646 * Set it up so we don't stop
3649 stcb->asoc.str_reset_seq_out--;
3650 asoc->stream_reset_out_is_outstanding = 1;
3653 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3655 if (no_clear == 0) {
3656 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3658 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3659 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3660 number_entries = (lparm_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3661 if (asoc->stream_reset_outstanding)
3662 asoc->stream_reset_outstanding--;
3663 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3664 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3665 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3666 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3667 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3668 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3670 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3671 /* Ok we now may have more streams */
3674 num_stream = stcb->asoc.strm_pending_add_size;
3675 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3677 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3679 stcb->asoc.strm_pending_add_size = 0;
3680 if (asoc->stream_reset_outstanding)
3681 asoc->stream_reset_outstanding--;
3682 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3683 /* Put the new streams into effect */
3686 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3687 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3689 asoc->streamoutcnt += num_stream;
3690 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3691 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3692 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3693 SCTP_STREAM_CHANGE_DENIED);
3695 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3696 SCTP_STREAM_CHANGE_FAILED);
3698 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3699 if (asoc->stream_reset_outstanding)
3700 asoc->stream_reset_outstanding--;
3701 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3702 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3703 SCTP_STREAM_CHANGE_DENIED);
3704 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3705 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3706 SCTP_STREAM_CHANGE_FAILED);
3708 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3710 * a) Adopt the new in tsn.
3712 * c) Adopt the new out-tsn
3714 struct sctp_stream_reset_response_tsn *resp;
3715 struct sctp_forward_tsn_chunk fwdtsn;
3718 if (respin == NULL) {
3722 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3725 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3726 resp = (struct sctp_stream_reset_response_tsn *)respin;
3727 asoc->stream_reset_outstanding--;
3728 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3729 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3730 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3731 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3735 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3736 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3737 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3739 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3740 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3741 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3743 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3744 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3746 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3747 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3749 sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL);
3750 sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL);
3751 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3752 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3753 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3754 SCTP_ASSOC_RESET_DENIED);
3756 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3757 SCTP_ASSOC_RESET_FAILED);
3760 /* get rid of the request and get the request flags */
3761 if (asoc->stream_reset_outstanding == 0) {
3762 sctp_clean_up_stream_reset(stcb);
3766 if (asoc->stream_reset_outstanding == 0) {
3767 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3773 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3774 struct sctp_tmit_chunk *chk,
3775 struct sctp_stream_reset_in_request *req, int trunc)
3783 * peer wants me to send a str-reset to him for my outgoing seq's if
3786 struct sctp_association *asoc = &stcb->asoc;
3788 seq = ntohl(req->request_seq);
3789 if (asoc->str_reset_seq_in == seq) {
3790 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3791 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3792 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3794 /* Can't do it, since they exceeded our buffer size */
3795 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3796 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3797 len = ntohs(req->ph.param_length);
3798 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3799 if (number_entries) {
3800 for (i = 0; i < number_entries; i++) {
3801 temp = ntohs(req->list_of_streams[i]);
3802 if (temp >= stcb->asoc.streamoutcnt) {
3803 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3806 req->list_of_streams[i] = temp;
3808 for (i = 0; i < number_entries; i++) {
3809 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3810 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3815 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3816 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3817 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3820 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3822 /* Can't do it, since we have sent one out */
3823 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3826 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3827 asoc->str_reset_seq_in++;
3828 } else if (asoc->str_reset_seq_in - 1 == seq) {
3829 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3830 } else if (asoc->str_reset_seq_in - 2 == seq) {
3831 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3833 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3835 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3839 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3840 struct sctp_tmit_chunk *chk,
3841 struct sctp_stream_reset_tsn_request *req)
3843 /* reset all in and out and update the tsn */
3845 * A) reset my str-seq's on in and out. B) Select a receive next,
3846 * and set cum-ack to it. Also process this selected number as a
3847 * fwd-tsn as well. C) set in the response my next sending seq.
3849 struct sctp_forward_tsn_chunk fwdtsn;
3850 struct sctp_association *asoc = &stcb->asoc;
3854 seq = ntohl(req->request_seq);
3855 if (asoc->str_reset_seq_in == seq) {
3856 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3857 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3858 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3860 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3861 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3862 fwdtsn.ch.chunk_flags = 0;
3863 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3864 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3868 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3869 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3870 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3872 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3873 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3874 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3875 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3876 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3877 atomic_add_int(&asoc->sending_seq, 1);
3878 /* save off historical data for retrans */
3879 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3880 asoc->last_sending_seq[0] = asoc->sending_seq;
3881 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3882 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3883 sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL);
3884 sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL);
3885 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3886 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3888 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3889 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3890 asoc->str_reset_seq_in++;
3891 } else if (asoc->str_reset_seq_in - 1 == seq) {
3892 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3893 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3894 } else if (asoc->str_reset_seq_in - 2 == seq) {
3895 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3896 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3898 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3904 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3905 struct sctp_tmit_chunk *chk,
3906 struct sctp_stream_reset_out_request *req, int trunc)
3909 int number_entries, len;
3910 struct sctp_association *asoc = &stcb->asoc;
3912 seq = ntohl(req->request_seq);
3914 /* now if its not a duplicate we process it */
3915 if (asoc->str_reset_seq_in == seq) {
3916 len = ntohs(req->ph.param_length);
3917 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3919 * the sender is resetting, handle the list issue.. we must
3920 * a) verify if we can do the reset, if so no problem b) If
3921 * we can't do the reset we must copy the request. c) queue
3922 * it, and setup the data in processor to trigger it off
3923 * when needed and dequeue all the queued data.
3925 tsn = ntohl(req->send_reset_at_tsn);
3927 /* move the reset action back one */
3928 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3929 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3930 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3932 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3933 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
3934 /* we can do it now */
3935 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
3936 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3939 * we must queue it up and thus wait for the TSN's
3940 * to arrive that are at or before tsn
3942 struct sctp_stream_reset_list *liste;
3945 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
3946 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
3947 siz, SCTP_M_STRESET);
3948 if (liste == NULL) {
3949 /* gak out of memory */
3950 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3951 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3956 liste->number_entries = number_entries;
3957 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
3958 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
3959 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
3961 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3962 asoc->str_reset_seq_in++;
3963 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3965 * one seq back, just echo back last action since my
3966 * response was lost.
3968 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3969 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3971 * two seq back, just echo back last action since my
3972 * response was lost.
3974 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3976 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3981 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3982 struct sctp_stream_reset_add_strm *str_add)
3985 * Peer is requesting to add more streams. If its within our
3986 * max-streams we will allow it.
3988 uint32_t num_stream, i;
3990 struct sctp_association *asoc = &stcb->asoc;
3991 struct sctp_queued_to_read *ctl, *nctl;
3993 /* Get the number. */
3994 seq = ntohl(str_add->request_seq);
3995 num_stream = ntohs(str_add->number_of_streams);
3996 /* Now what would be the new total? */
3997 if (asoc->str_reset_seq_in == seq) {
3998 num_stream += stcb->asoc.streamincnt;
3999 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4000 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4001 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4002 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
4003 (num_stream > 0xffff)) {
4004 /* We must reject it they ask for to many */
4006 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4008 /* Ok, we can do that :-) */
4009 struct sctp_stream_in *oldstrm;
4011 /* save off the old */
4012 oldstrm = stcb->asoc.strmin;
4013 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
4014 (num_stream * sizeof(struct sctp_stream_in)),
4016 if (stcb->asoc.strmin == NULL) {
4017 stcb->asoc.strmin = oldstrm;
4020 /* copy off the old data */
4021 for (i = 0; i < stcb->asoc.streamincnt; i++) {
4022 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
4023 stcb->asoc.strmin[i].stream_no = i;
4024 stcb->asoc.strmin[i].last_sequence_delivered = oldstrm[i].last_sequence_delivered;
4025 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
4026 /* now anything on those queues? */
4027 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next, nctl) {
4028 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next);
4029 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next);
4032 /* Init the new streams */
4033 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
4034 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
4035 stcb->asoc.strmin[i].stream_no = i;
4036 stcb->asoc.strmin[i].last_sequence_delivered = 0xffff;
4037 stcb->asoc.strmin[i].delivery_started = 0;
4039 SCTP_FREE(oldstrm, SCTP_M_STRMI);
4040 /* update the size */
4041 stcb->asoc.streamincnt = num_stream;
4042 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4043 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
4045 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4046 asoc->str_reset_seq_in++;
4047 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4049 * one seq back, just echo back last action since my
4050 * response was lost.
4052 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4053 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4055 * two seq back, just echo back last action since my
4056 * response was lost.
4058 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4060 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4066 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
4067 struct sctp_stream_reset_add_strm *str_add)
4070 * Peer is requesting to add more streams. If its within our
4071 * max-streams we will allow it.
4073 uint16_t num_stream;
4075 struct sctp_association *asoc = &stcb->asoc;
4077 /* Get the number. */
4078 seq = ntohl(str_add->request_seq);
4079 num_stream = ntohs(str_add->number_of_streams);
4080 /* Now what would be the new total? */
4081 if (asoc->str_reset_seq_in == seq) {
4082 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4083 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4084 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4085 } else if (stcb->asoc.stream_reset_outstanding) {
4086 /* We must reject it we have something pending */
4087 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
4089 /* Ok, we can do that :-) */
4092 mychk = stcb->asoc.streamoutcnt;
4093 mychk += num_stream;
4094 if (mychk < 0x10000) {
4095 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4096 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
4097 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4100 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4103 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
4104 asoc->str_reset_seq_in++;
4105 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4107 * one seq back, just echo back last action since my
4108 * response was lost.
4110 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4111 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4113 * two seq back, just echo back last action since my
4114 * response was lost.
4116 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4118 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4123 __attribute__((noinline))
4126 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
4127 struct sctp_chunkhdr *ch_req)
4129 uint16_t remaining_length, param_len, ptype;
4130 struct sctp_paramhdr pstore;
4131 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
4135 struct sctp_tmit_chunk *chk;
4136 struct sctp_chunkhdr *ch;
4137 struct sctp_paramhdr *ph;
4141 /* now it may be a reset or a reset-response */
4142 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
4144 /* setup for adding the response */
4145 sctp_alloc_a_chunk(stcb, chk);
4149 chk->copy_by_ref = 0;
4150 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
4151 chk->rec.chunk_id.can_take_data = 0;
4153 chk->asoc = &stcb->asoc;
4154 chk->no_fr_allowed = 0;
4155 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
4156 chk->book_size_scale = 0;
4157 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
4158 if (chk->data == NULL) {
4161 sctp_m_freem(chk->data);
4164 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
4167 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
4169 /* setup chunk parameters */
4170 chk->sent = SCTP_DATAGRAM_UNSENT;
4174 ch = mtod(chk->data, struct sctp_chunkhdr *);
4175 ch->chunk_type = SCTP_STREAM_RESET;
4176 ch->chunk_flags = 0;
4177 ch->chunk_length = htons(chk->send_size);
4178 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4179 offset += sizeof(struct sctp_chunkhdr);
4180 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
4181 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *) & pstore);
4186 param_len = ntohs(ph->param_length);
4187 if ((param_len > remaining_length) ||
4188 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
4189 /* bad parameter length */
4192 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
4193 (uint8_t *) & cstore);
4198 ptype = ntohs(ph->param_type);
4200 if (param_len > sizeof(cstore)) {
4205 if (num_param > SCTP_MAX_RESET_PARAMS) {
4206 /* hit the max of parameters already sorry.. */
4209 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4210 struct sctp_stream_reset_out_request *req_out;
4212 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4215 req_out = (struct sctp_stream_reset_out_request *)ph;
4217 if (stcb->asoc.stream_reset_outstanding) {
4218 seq = ntohl(req_out->response_seq);
4219 if (seq == stcb->asoc.str_reset_seq_out) {
4221 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4224 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4225 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4226 struct sctp_stream_reset_add_strm *str_add;
4228 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4231 str_add = (struct sctp_stream_reset_add_strm *)ph;
4233 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4234 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4235 struct sctp_stream_reset_add_strm *str_add;
4237 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4240 str_add = (struct sctp_stream_reset_add_strm *)ph;
4242 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4243 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4244 struct sctp_stream_reset_in_request *req_in;
4247 req_in = (struct sctp_stream_reset_in_request *)ph;
4248 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4249 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4250 struct sctp_stream_reset_tsn_request *req_tsn;
4253 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4254 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4256 goto strres_nochunk;
4260 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4261 struct sctp_stream_reset_response *resp;
4264 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4267 resp = (struct sctp_stream_reset_response *)ph;
4268 seq = ntohl(resp->response_seq);
4269 result = ntohl(resp->result);
4270 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4272 goto strres_nochunk;
4277 offset += SCTP_SIZE32(param_len);
4278 if (remaining_length >= SCTP_SIZE32(param_len)) {
4279 remaining_length -= SCTP_SIZE32(param_len);
4281 remaining_length = 0;
4285 /* we have no response free the stuff */
4286 goto strres_nochunk;
4288 /* ok we have a chunk to link in */
4289 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4292 stcb->asoc.ctrl_queue_cnt++;
4297 * Handle a router or endpoints report of a packet loss, there are two ways
4298 * to handle this, either we get the whole packet and must disect it
4299 * ourselves (possibly with truncation and or corruption) or it is a summary
4300 * from a middle box that did the disectting for us.
4303 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4304 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4306 uint32_t bottle_bw, on_queue;
4310 struct sctp_chunk_desc desc;
4311 struct sctp_chunkhdr *ch;
4313 chlen = ntohs(cp->ch.chunk_length);
4314 chlen -= sizeof(struct sctp_pktdrop_chunk);
4315 /* XXX possible chlen underflow */
4318 if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)
4319 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4321 ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr));
4322 chlen -= sizeof(struct sctphdr);
4323 /* XXX possible chlen underflow */
4324 memset(&desc, 0, sizeof(desc));
4326 trunc_len = (uint16_t) ntohs(cp->trunc_len);
4327 if (trunc_len > limit) {
4330 /* now the chunks themselves */
4331 while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) {
4332 desc.chunk_type = ch->chunk_type;
4333 /* get amount we need to move */
4334 at = ntohs(ch->chunk_length);
4335 if (at < sizeof(struct sctp_chunkhdr)) {
4336 /* corrupt chunk, maybe at the end? */
4337 SCTP_STAT_INCR(sctps_pdrpcrupt);
4340 if (trunc_len == 0) {
4341 /* we are supposed to have all of it */
4343 /* corrupt skip it */
4344 SCTP_STAT_INCR(sctps_pdrpcrupt);
4348 /* is there enough of it left ? */
4349 if (desc.chunk_type == SCTP_DATA) {
4350 if (chlen < (sizeof(struct sctp_data_chunk) +
4351 sizeof(desc.data_bytes))) {
4355 if (chlen < sizeof(struct sctp_chunkhdr)) {
4360 if (desc.chunk_type == SCTP_DATA) {
4361 /* can we get out the tsn? */
4362 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4363 SCTP_STAT_INCR(sctps_pdrpmbda);
4365 if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) {
4367 struct sctp_data_chunk *dcp;
4371 dcp = (struct sctp_data_chunk *)ch;
4372 ddp = (uint8_t *) (dcp + 1);
4373 for (iii = 0; iii < sizeof(desc.data_bytes); iii++) {
4374 desc.data_bytes[iii] = ddp[iii];
4376 desc.tsn_ifany = dcp->dp.tsn;
4378 /* nope we are done. */
4379 SCTP_STAT_INCR(sctps_pdrpnedat);
4383 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4384 SCTP_STAT_INCR(sctps_pdrpmbct);
4387 if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) {
4388 SCTP_STAT_INCR(sctps_pdrppdbrk);
4391 if (SCTP_SIZE32(at) > chlen) {
4394 chlen -= SCTP_SIZE32(at);
4395 if (chlen < sizeof(struct sctp_chunkhdr)) {
4396 /* done, none left */
4399 ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at));
4401 /* Now update any rwnd --- possibly */
4402 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4403 /* From a peer, we get a rwnd report */
4406 SCTP_STAT_INCR(sctps_pdrpfehos);
4408 bottle_bw = ntohl(cp->bottle_bw);
4409 on_queue = ntohl(cp->current_onq);
4410 if (bottle_bw && on_queue) {
4411 /* a rwnd report is in here */
4412 if (bottle_bw > on_queue)
4413 a_rwnd = bottle_bw - on_queue;
4418 stcb->asoc.peers_rwnd = 0;
4420 if (a_rwnd > stcb->asoc.total_flight) {
4421 stcb->asoc.peers_rwnd =
4422 a_rwnd - stcb->asoc.total_flight;
4424 stcb->asoc.peers_rwnd = 0;
4426 if (stcb->asoc.peers_rwnd <
4427 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4428 /* SWS sender side engages */
4429 stcb->asoc.peers_rwnd = 0;
4434 SCTP_STAT_INCR(sctps_pdrpfmbox);
4437 /* now middle boxes in sat networks get a cwnd bump */
4438 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) &&
4439 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4440 (stcb->asoc.sat_network)) {
4442 * This is debateable but for sat networks it makes sense
4443 * Note if a T3 timer has went off, we will prohibit any
4444 * changes to cwnd until we exit the t3 loss recovery.
4446 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4447 net, cp, &bottle_bw, &on_queue);
4452 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4453 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4454 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4455 * length of the complete packet outputs: - length: modified to remaining
4456 * length after control processing - netp: modified to new sctp_nets after
4457 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4458 * bad packet,...) otherwise return the tcb for this packet
4461 __attribute__((noinline))
4463 static struct sctp_tcb *
4464 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4465 struct sockaddr *src, struct sockaddr *dst,
4466 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4467 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4468 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4469 uint32_t vrf_id, uint16_t port)
4471 struct sctp_association *asoc;
4472 struct mbuf *op_err;
4473 char msg[SCTP_DIAG_INFO_LEN];
4475 int num_chunks = 0; /* number of control chunks processed */
4476 uint32_t chk_length;
4478 int abort_no_unlock = 0;
4482 * How big should this be, and should it be alloc'd? Lets try the
4483 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4484 * until we get into jumbo grams and such..
4486 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4487 struct sctp_tcb *locked_tcb = stcb;
4489 uint32_t auth_offset = 0, auth_len = 0;
4490 int auth_skipped = 0;
4493 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4498 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4499 iphlen, *offset, length, (void *)stcb);
4501 /* validate chunk header length... */
4502 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4503 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4504 ntohs(ch->chunk_length));
4506 SCTP_TCB_UNLOCK(locked_tcb);
4511 * validate the verification tag
4513 vtag_in = ntohl(sh->v_tag);
4516 SCTP_TCB_LOCK_ASSERT(locked_tcb);
4518 if (ch->chunk_type == SCTP_INITIATION) {
4519 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4520 ntohs(ch->chunk_length), vtag_in);
4522 /* protocol error- silently discard... */
4523 SCTP_STAT_INCR(sctps_badvtag);
4525 SCTP_TCB_UNLOCK(locked_tcb);
4529 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4531 * If there is no stcb, skip the AUTH chunk and process
4532 * later after a stcb is found (to validate the lookup was
4535 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4537 (inp->auth_supported == 1)) {
4538 /* save this chunk for later processing */
4540 auth_offset = *offset;
4541 auth_len = ntohs(ch->chunk_length);
4543 /* (temporarily) move past this chunk */
4544 *offset += SCTP_SIZE32(auth_len);
4545 if (*offset >= length) {
4546 /* no more data left in the mbuf chain */
4549 SCTP_TCB_UNLOCK(locked_tcb);
4553 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4554 sizeof(struct sctp_chunkhdr), chunk_buf);
4560 SCTP_TCB_UNLOCK(locked_tcb);
4564 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4565 goto process_control_chunks;
4568 * first check if it's an ASCONF with an unknown src addr we
4569 * need to look inside to find the association
4571 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4572 struct sctp_chunkhdr *asconf_ch = ch;
4573 uint32_t asconf_offset = 0, asconf_len = 0;
4575 /* inp's refcount may be reduced */
4576 SCTP_INP_INCR_REF(inp);
4578 asconf_offset = *offset;
4580 asconf_len = ntohs(asconf_ch->chunk_length);
4581 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4583 stcb = sctp_findassociation_ep_asconf(m,
4586 sh, &inp, netp, vrf_id);
4589 asconf_offset += SCTP_SIZE32(asconf_len);
4590 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4591 sizeof(struct sctp_chunkhdr), chunk_buf);
4592 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4595 * reduce inp's refcount if not reduced in
4596 * sctp_findassociation_ep_asconf().
4598 SCTP_INP_DECR_REF(inp);
4603 /* now go back and verify any auth chunk to be sure */
4604 if (auth_skipped && (stcb != NULL)) {
4605 struct sctp_auth_chunk *auth;
4607 auth = (struct sctp_auth_chunk *)
4608 sctp_m_getptr(m, auth_offset,
4609 auth_len, chunk_buf);
4612 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4614 /* auth HMAC failed so dump it */
4617 SCTP_TCB_UNLOCK(locked_tcb);
4621 /* remaining chunks are HMAC checked */
4622 stcb->asoc.authenticated = 1;
4627 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __FUNCTION__);
4628 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4630 /* no association, so it's out of the blue... */
4631 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4632 mflowtype, mflowid, inp->fibnum,
4636 SCTP_TCB_UNLOCK(locked_tcb);
4641 /* ABORT and SHUTDOWN can use either v_tag... */
4642 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4643 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4644 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4645 /* Take the T-bit always into account. */
4646 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4647 (vtag_in == asoc->my_vtag)) ||
4648 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4649 (vtag_in == asoc->peer_vtag))) {
4652 /* drop this packet... */
4653 SCTP_STAT_INCR(sctps_badvtag);
4655 SCTP_TCB_UNLOCK(locked_tcb);
4659 } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
4660 if (vtag_in != asoc->my_vtag) {
4662 * this could be a stale SHUTDOWN-ACK or the
4663 * peer never got the SHUTDOWN-COMPLETE and
4664 * is still hung; we have started a new asoc
4665 * but it won't complete until the shutdown
4669 SCTP_TCB_UNLOCK(locked_tcb);
4671 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __FUNCTION__);
4672 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4674 sctp_handle_ootb(m, iphlen, *offset, src, dst,
4676 mflowtype, mflowid, fibnum,
4681 /* for all other chunks, vtag must match */
4682 if (vtag_in != asoc->my_vtag) {
4683 /* invalid vtag... */
4684 SCTPDBG(SCTP_DEBUG_INPUT3,
4685 "invalid vtag: %xh, expect %xh\n",
4686 vtag_in, asoc->my_vtag);
4687 SCTP_STAT_INCR(sctps_badvtag);
4689 SCTP_TCB_UNLOCK(locked_tcb);
4695 } /* end if !SCTP_COOKIE_ECHO */
4697 * process all control chunks...
4699 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4700 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4701 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4702 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
4703 /* implied cookie-ack.. we must have lost the ack */
4704 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
4705 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
4706 stcb->asoc.overall_error_count,
4708 SCTP_FROM_SCTP_INPUT,
4711 stcb->asoc.overall_error_count = 0;
4712 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4715 process_control_chunks:
4716 while (IS_SCTP_CONTROL(ch)) {
4717 /* validate chunk length */
4718 chk_length = ntohs(ch->chunk_length);
4719 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4720 ch->chunk_type, chk_length);
4721 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4722 if (chk_length < sizeof(*ch) ||
4723 (*offset + (int)chk_length) > length) {
4726 SCTP_TCB_UNLOCK(locked_tcb);
4730 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4732 * INIT-ACK only gets the init ack "header" portion only
4733 * because we don't have to process the peer's COOKIE. All
4734 * others get a complete chunk.
4736 if ((ch->chunk_type == SCTP_INITIATION_ACK) ||
4737 (ch->chunk_type == SCTP_INITIATION)) {
4738 /* get an init-ack chunk */
4739 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4740 sizeof(struct sctp_init_ack_chunk), chunk_buf);
4744 SCTP_TCB_UNLOCK(locked_tcb);
4749 /* For cookies and all other chunks. */
4750 if (chk_length > sizeof(chunk_buf)) {
4752 * use just the size of the chunk buffer so
4753 * the front part of our chunks fit in
4754 * contiguous space up to the chunk buffer
4755 * size (508 bytes). For chunks that need to
4756 * get more than that they must use the
4757 * sctp_m_getptr() function or other means
4758 * (e.g. know how to parse mbuf chains).
4759 * Cookies do this already.
4761 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4762 (sizeof(chunk_buf) - 4),
4767 SCTP_TCB_UNLOCK(locked_tcb);
4772 /* We can fit it all */
4773 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4774 chk_length, chunk_buf);
4776 SCTP_PRINTF("sctp_process_control: Can't get the all data....\n");
4779 SCTP_TCB_UNLOCK(locked_tcb);
4786 /* Save off the last place we got a control from */
4788 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4790 * allow last_control to be NULL if
4791 * ASCONF... ASCONF processing will find the
4794 if ((netp != NULL) && (*netp != NULL))
4795 stcb->asoc.last_control_chunk_from = *netp;
4798 #ifdef SCTP_AUDITING_ENABLED
4799 sctp_audit_log(0xB0, ch->chunk_type);
4802 /* check to see if this chunk required auth, but isn't */
4803 if ((stcb != NULL) &&
4804 (stcb->asoc.auth_supported == 1) &&
4805 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4806 !stcb->asoc.authenticated) {
4807 /* "silently" ignore */
4808 SCTP_STAT_INCR(sctps_recvauthmissing);
4811 switch (ch->chunk_type) {
4812 case SCTP_INITIATION:
4813 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4814 /* The INIT chunk must be the only chunk. */
4815 if ((num_chunks > 1) ||
4816 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4817 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4818 "INIT not the only chunk");
4819 sctp_abort_association(inp, stcb, m, iphlen,
4820 src, dst, sh, op_err,
4826 /* Honor our resource limit. */
4827 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4828 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4829 sctp_abort_association(inp, stcb, m, iphlen,
4830 src, dst, sh, op_err,
4836 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4837 (struct sctp_init_chunk *)ch, inp,
4838 stcb, &abort_no_unlock,
4842 if ((!abort_no_unlock) && (locked_tcb)) {
4843 SCTP_TCB_UNLOCK(locked_tcb);
4847 case SCTP_PAD_CHUNK:
4849 case SCTP_INITIATION_ACK:
4850 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT-ACK\n");
4851 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4852 /* We are not interested anymore */
4853 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
4856 if (locked_tcb != stcb) {
4858 SCTP_TCB_UNLOCK(locked_tcb);
4862 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4863 so = SCTP_INP_SO(inp);
4864 atomic_add_int(&stcb->asoc.refcnt, 1);
4865 SCTP_TCB_UNLOCK(stcb);
4866 SCTP_SOCKET_LOCK(so, 1);
4867 SCTP_TCB_LOCK(stcb);
4868 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4870 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4871 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4872 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4873 SCTP_SOCKET_UNLOCK(so, 1);
4879 /* The INIT-ACK chunk must be the only chunk. */
4880 if ((num_chunks > 1) ||
4881 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4884 SCTP_TCB_UNLOCK(locked_tcb);
4888 if ((netp) && (*netp)) {
4889 ret = sctp_handle_init_ack(m, iphlen, *offset,
4891 (struct sctp_init_ack_chunk *)ch,
4900 if (abort_no_unlock) {
4904 * Special case, I must call the output routine to
4905 * get the cookie echoed
4907 if ((stcb != NULL) && (ret == 0)) {
4908 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4911 SCTP_TCB_UNLOCK(locked_tcb);
4915 case SCTP_SELECTIVE_ACK:
4917 struct sctp_sack_chunk *sack;
4919 uint32_t a_rwnd, cum_ack;
4920 uint16_t num_seg, num_dup;
4922 int offset_seg, offset_dup;
4924 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SACK\n");
4925 SCTP_STAT_INCR(sctps_recvsacks);
4927 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing SACK chunk\n");
4930 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4931 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4934 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4936 * If we have sent a shutdown-ack, we will pay no
4937 * attention to a sack sent in to us since
4938 * we don't care anymore.
4942 sack = (struct sctp_sack_chunk *)ch;
4943 flags = ch->chunk_flags;
4944 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4945 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4946 num_dup = ntohs(sack->sack.num_dup_tsns);
4947 a_rwnd = (uint32_t) ntohl(sack->sack.a_rwnd);
4948 if (sizeof(struct sctp_sack_chunk) +
4949 num_seg * sizeof(struct sctp_gap_ack_block) +
4950 num_dup * sizeof(uint32_t) != chk_length) {
4951 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4954 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4955 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4956 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SACK process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4957 cum_ack, num_seg, a_rwnd);
4958 stcb->asoc.seen_a_sack_this_pkt = 1;
4959 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4961 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4962 (stcb->asoc.saw_sack_with_frags == 0) &&
4963 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4964 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))
4967 * We have a SIMPLE sack having no
4968 * prior segments and data on sent
4969 * queue to be acked.. Use the
4970 * faster path sack processing. We
4971 * also allow window update sacks
4972 * with no missing segments to go
4975 sctp_express_handle_sack(stcb, cum_ack, a_rwnd, &abort_now, ecne_seen);
4978 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
4979 num_seg, 0, num_dup, &abort_now, flags,
4980 cum_ack, a_rwnd, ecne_seen);
4983 /* ABORT signal from sack processing */
4987 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
4988 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
4989 (stcb->asoc.stream_queue_cnt == 0)) {
4990 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
4995 * EY - nr_sack: If the received chunk is an
4998 case SCTP_NR_SELECTIVE_ACK:
5000 struct sctp_nr_sack_chunk *nr_sack;
5002 uint32_t a_rwnd, cum_ack;
5003 uint16_t num_seg, num_nr_seg, num_dup;
5005 int offset_seg, offset_dup;
5007 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_NR_SACK\n");
5008 SCTP_STAT_INCR(sctps_recvsacks);
5010 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing NR-SACK chunk\n");
5013 if (stcb->asoc.nrsack_supported == 0) {
5016 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
5017 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR-SACK chunk, too small\n");
5020 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
5022 * If we have sent a shutdown-ack, we will pay no
5023 * attention to a sack sent in to us since
5024 * we don't care anymore.
5028 nr_sack = (struct sctp_nr_sack_chunk *)ch;
5029 flags = ch->chunk_flags;
5030 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
5031 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
5032 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
5033 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
5034 a_rwnd = (uint32_t) ntohl(nr_sack->nr_sack.a_rwnd);
5035 if (sizeof(struct sctp_nr_sack_chunk) +
5036 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
5037 num_dup * sizeof(uint32_t) != chk_length) {
5038 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
5041 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
5042 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
5043 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_NR_SACK process cum_ack:%x num_seg:%d a_rwnd:%d\n",
5044 cum_ack, num_seg, a_rwnd);
5045 stcb->asoc.seen_a_sack_this_pkt = 1;
5046 if ((stcb->asoc.pr_sctp_cnt == 0) &&
5047 (num_seg == 0) && (num_nr_seg == 0) &&
5048 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
5049 (stcb->asoc.saw_sack_with_frags == 0) &&
5050 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
5051 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
5053 * We have a SIMPLE sack having no
5054 * prior segments and data on sent
5055 * queue to be acked. Use the faster
5056 * path sack processing. We also
5057 * allow window update sacks with no
5058 * missing segments to go this way
5061 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
5062 &abort_now, ecne_seen);
5065 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
5066 num_seg, num_nr_seg, num_dup, &abort_now, flags,
5067 cum_ack, a_rwnd, ecne_seen);
5070 /* ABORT signal from sack processing */
5074 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
5075 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
5076 (stcb->asoc.stream_queue_cnt == 0)) {
5077 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
5082 case SCTP_HEARTBEAT_REQUEST:
5083 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
5084 if ((stcb) && netp && *netp) {
5085 SCTP_STAT_INCR(sctps_recvheartbeat);
5086 sctp_send_heartbeat_ack(stcb, m, *offset,
5089 /* He's alive so give him credit */
5090 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5091 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5092 stcb->asoc.overall_error_count,
5094 SCTP_FROM_SCTP_INPUT,
5097 stcb->asoc.overall_error_count = 0;
5100 case SCTP_HEARTBEAT_ACK:
5101 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT-ACK\n");
5102 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
5106 SCTP_TCB_UNLOCK(locked_tcb);
5110 /* He's alive so give him credit */
5111 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5112 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5113 stcb->asoc.overall_error_count,
5115 SCTP_FROM_SCTP_INPUT,
5118 stcb->asoc.overall_error_count = 0;
5119 SCTP_STAT_INCR(sctps_recvheartbeatack);
5121 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
5124 case SCTP_ABORT_ASSOCIATION:
5125 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
5127 if ((stcb) && netp && *netp)
5128 sctp_handle_abort((struct sctp_abort_chunk *)ch,
5134 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
5136 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
5139 SCTP_TCB_UNLOCK(locked_tcb);
5143 if (netp && *netp) {
5146 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
5147 stcb, *netp, &abort_flag);
5154 case SCTP_SHUTDOWN_ACK:
5155 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-ACK, stcb %p\n", (void *)stcb);
5156 if ((stcb) && (netp) && (*netp))
5157 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
5162 case SCTP_OPERATION_ERROR:
5163 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP-ERR\n");
5164 if ((stcb) && netp && *netp && sctp_handle_error(ch, stcb, *netp) < 0) {
5169 case SCTP_COOKIE_ECHO:
5170 SCTPDBG(SCTP_DEBUG_INPUT3,
5171 "SCTP_COOKIE-ECHO, stcb %p\n", (void *)stcb);
5172 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
5175 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5176 /* We are not interested anymore */
5179 SCTP_TCB_UNLOCK(stcb);
5186 * First are we accepting? We do this again here
5187 * since it is possible that a previous endpoint WAS
5188 * listening responded to a INIT-ACK and then
5189 * closed. We opened and bound.. and are now no
5193 if ((stcb == NULL) && (inp->sctp_socket->so_qlen >= inp->sctp_socket->so_qlimit)) {
5194 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
5195 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
5196 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
5197 sctp_abort_association(inp, stcb, m, iphlen,
5198 src, dst, sh, op_err,
5205 struct mbuf *ret_buf;
5206 struct sctp_inpcb *linp;
5215 SCTP_ASOC_CREATE_LOCK(linp);
5216 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
5217 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
5218 SCTP_ASOC_CREATE_UNLOCK(linp);
5224 sctp_handle_cookie_echo(m, iphlen,
5228 (struct sctp_cookie_echo_chunk *)ch,
5242 SCTP_ASOC_CREATE_UNLOCK(linp);
5244 if (ret_buf == NULL) {
5246 SCTP_TCB_UNLOCK(locked_tcb);
5248 SCTPDBG(SCTP_DEBUG_INPUT3,
5249 "GAK, null buffer\n");
5253 /* if AUTH skipped, see if it verified... */
5258 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
5260 * Restart the timer if we have
5263 struct sctp_tmit_chunk *chk;
5265 chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
5266 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
5270 case SCTP_COOKIE_ACK:
5271 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE-ACK, stcb %p\n", (void *)stcb);
5272 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
5274 SCTP_TCB_UNLOCK(locked_tcb);
5278 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5279 /* We are not interested anymore */
5280 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
5283 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5284 so = SCTP_INP_SO(inp);
5285 atomic_add_int(&stcb->asoc.refcnt, 1);
5286 SCTP_TCB_UNLOCK(stcb);
5287 SCTP_SOCKET_LOCK(so, 1);
5288 SCTP_TCB_LOCK(stcb);
5289 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5291 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5292 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
5293 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5294 SCTP_SOCKET_UNLOCK(so, 1);
5300 /* He's alive so give him credit */
5301 if ((stcb) && netp && *netp) {
5302 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5303 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5304 stcb->asoc.overall_error_count,
5306 SCTP_FROM_SCTP_INPUT,
5309 stcb->asoc.overall_error_count = 0;
5310 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
5314 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-ECHO\n");
5315 /* He's alive so give him credit */
5316 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_ecne_chunk))) {
5319 SCTP_TCB_UNLOCK(locked_tcb);
5325 if (stcb->asoc.ecn_supported == 0) {
5328 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5329 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5330 stcb->asoc.overall_error_count,
5332 SCTP_FROM_SCTP_INPUT,
5335 stcb->asoc.overall_error_count = 0;
5336 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch,
5342 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-CWR\n");
5343 /* He's alive so give him credit */
5344 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_cwr_chunk))) {
5347 SCTP_TCB_UNLOCK(locked_tcb);
5353 if (stcb->asoc.ecn_supported == 0) {
5356 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5357 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5358 stcb->asoc.overall_error_count,
5360 SCTP_FROM_SCTP_INPUT,
5363 stcb->asoc.overall_error_count = 0;
5364 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5367 case SCTP_SHUTDOWN_COMPLETE:
5368 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-COMPLETE, stcb %p\n", (void *)stcb);
5369 /* must be first and only chunk */
5370 if ((num_chunks > 1) ||
5371 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5374 SCTP_TCB_UNLOCK(locked_tcb);
5378 if ((stcb) && netp && *netp) {
5379 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5386 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5387 /* He's alive so give him credit */
5389 if (stcb->asoc.asconf_supported == 0) {
5392 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5393 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5394 stcb->asoc.overall_error_count,
5396 SCTP_FROM_SCTP_INPUT,
5399 stcb->asoc.overall_error_count = 0;
5400 sctp_handle_asconf(m, *offset, src,
5401 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5405 case SCTP_ASCONF_ACK:
5406 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF-ACK\n");
5407 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5410 SCTP_TCB_UNLOCK(locked_tcb);
5415 if ((stcb) && netp && *netp) {
5416 if (stcb->asoc.asconf_supported == 0) {
5419 /* He's alive so give him credit */
5420 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5421 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5422 stcb->asoc.overall_error_count,
5424 SCTP_FROM_SCTP_INPUT,
5427 stcb->asoc.overall_error_count = 0;
5428 sctp_handle_asconf_ack(m, *offset,
5429 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5430 if (abort_no_unlock)
5434 case SCTP_FORWARD_CUM_TSN:
5435 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_FWD-TSN\n");
5436 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5439 SCTP_TCB_UNLOCK(locked_tcb);
5444 /* He's alive so give him credit */
5448 if (stcb->asoc.prsctp_supported == 0) {
5451 stcb->asoc.overall_error_count = 0;
5452 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5453 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5454 stcb->asoc.overall_error_count,
5456 SCTP_FROM_SCTP_INPUT,
5460 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5461 /* We are not interested anymore */
5462 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5463 so = SCTP_INP_SO(inp);
5464 atomic_add_int(&stcb->asoc.refcnt, 1);
5465 SCTP_TCB_UNLOCK(stcb);
5466 SCTP_SOCKET_LOCK(so, 1);
5467 SCTP_TCB_LOCK(stcb);
5468 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5470 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5471 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5472 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5473 SCTP_SOCKET_UNLOCK(so, 1);
5478 sctp_handle_forward_tsn(stcb,
5479 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5484 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5485 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5486 stcb->asoc.overall_error_count,
5488 SCTP_FROM_SCTP_INPUT,
5491 stcb->asoc.overall_error_count = 0;
5496 case SCTP_STREAM_RESET:
5497 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5498 if (((stcb == NULL) || (ch == NULL) || (chk_length < sizeof(struct sctp_stream_reset_tsn_req)))) {
5501 SCTP_TCB_UNLOCK(locked_tcb);
5506 if (stcb->asoc.reconfig_supported == 0) {
5509 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5510 /* stop processing */
5515 case SCTP_PACKET_DROPPED:
5516 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5517 /* re-get it all please */
5518 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5521 SCTP_TCB_UNLOCK(locked_tcb);
5526 if (ch && (stcb) && netp && (*netp)) {
5527 if (stcb->asoc.pktdrop_supported == 0) {
5530 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5532 min(chk_length, (sizeof(chunk_buf) - 4)));
5536 case SCTP_AUTHENTICATION:
5537 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5539 /* save the first AUTH for later processing */
5540 if (auth_skipped == 0) {
5541 auth_offset = *offset;
5542 auth_len = chk_length;
5545 /* skip this chunk (temporarily) */
5548 if (stcb->asoc.auth_supported == 0) {
5551 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5552 (chk_length > (sizeof(struct sctp_auth_chunk) +
5553 SCTP_AUTH_DIGEST_LEN_MAX))) {
5556 SCTP_TCB_UNLOCK(locked_tcb);
5561 if (got_auth == 1) {
5562 /* skip this chunk... it's already auth'd */
5566 if ((ch == NULL) || sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch,
5568 /* auth HMAC failed so dump the packet */
5572 /* remaining chunks are HMAC checked */
5573 stcb->asoc.authenticated = 1;
5579 /* it's an unknown chunk! */
5580 if ((ch->chunk_type & 0x40) && (stcb != NULL)) {
5582 struct sctp_paramhdr *phd;
5585 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
5586 0, M_NOWAIT, 1, MT_DATA);
5588 len = min(SCTP_SIZE32(chk_length), (uint32_t) (length - *offset));
5589 phd = mtod(mm, struct sctp_paramhdr *);
5591 * We cheat and use param type since
5592 * we did not bother to define a
5593 * error cause struct. They are the
5594 * same basic format with different
5597 phd->param_type = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5598 phd->param_length = htons(len + sizeof(*phd));
5599 SCTP_BUF_LEN(mm) = sizeof(*phd);
5600 SCTP_BUF_NEXT(mm) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5601 if (SCTP_BUF_NEXT(mm)) {
5602 if (sctp_pad_lastmbuf(SCTP_BUF_NEXT(mm), SCTP_SIZE32(len) - len, NULL) == NULL) {
5605 #ifdef SCTP_MBUF_LOGGING
5606 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5607 sctp_log_mbc(SCTP_BUF_NEXT(mm), SCTP_MBUF_ICOPY);
5610 sctp_queue_op_err(stcb, mm);
5617 if ((ch->chunk_type & 0x80) == 0) {
5618 /* discard this packet */
5621 } /* else skip this bad chunk and continue... */
5623 } /* switch (ch->chunk_type) */
5627 /* get the next chunk */
5628 *offset += SCTP_SIZE32(chk_length);
5629 if (*offset >= length) {
5630 /* no more data left in the mbuf chain */
5633 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5634 sizeof(struct sctp_chunkhdr), chunk_buf);
5637 SCTP_TCB_UNLOCK(locked_tcb);
5644 if (asconf_cnt > 0 && stcb != NULL) {
5645 sctp_send_asconf_ack(stcb);
5653 __attribute__((noinline))
5656 sctp_validate_no_locks(struct sctp_inpcb *inp)
5658 struct sctp_tcb *lstcb;
5660 LIST_FOREACH(lstcb, &inp->sctp_asoc_list, sctp_tcblist) {
5661 if (mtx_owned(&lstcb->tcb_mtx)) {
5662 panic("Own lock on stcb at return from input");
5665 if (mtx_owned(&inp->inp_create_mtx)) {
5666 panic("Own create lock on inp");
5668 if (mtx_owned(&inp->inp_mtx)) {
5669 panic("Own inp lock on inp");
5676 * common input chunk processing (v4 and v6)
5679 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5680 struct sockaddr *src, struct sockaddr *dst,
5681 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5682 #if !defined(SCTP_WITH_NO_CSUM)
5683 uint8_t compute_crc,
5686 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5687 uint32_t vrf_id, uint16_t port)
5690 int fwd_tsn_seen = 0, data_processed = 0;
5691 struct mbuf *m = *mm, *op_err;
5692 char msg[SCTP_DIAG_INFO_LEN];
5694 int cnt_ctrl_ready = 0;
5695 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5696 struct sctp_tcb *stcb = NULL;
5697 struct sctp_nets *net = NULL;
5699 SCTP_STAT_INCR(sctps_recvdatagrams);
5700 #ifdef SCTP_AUDITING_ENABLED
5701 sctp_audit_log(0xE0, 1);
5702 sctp_auditing(0, inp, stcb, net);
5704 #if !defined(SCTP_WITH_NO_CSUM)
5705 if (compute_crc != 0) {
5706 uint32_t check, calc_check;
5708 check = sh->checksum;
5710 calc_check = sctp_calculate_cksum(m, iphlen);
5711 sh->checksum = check;
5712 if (calc_check != check) {
5713 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5714 calc_check, check, (void *)m, length, iphlen);
5715 stcb = sctp_findassociation_addr(m, offset, src, dst,
5716 sh, ch, &inp, &net, vrf_id);
5717 #if defined(INET) || defined(INET6)
5718 if ((net != NULL) && (port != 0)) {
5719 if (net->port == 0) {
5720 sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
5726 net->flowtype = mflowtype;
5727 net->flowid = mflowid;
5729 if ((inp != NULL) && (stcb != NULL)) {
5730 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5731 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5732 } else if ((inp != NULL) && (stcb == NULL)) {
5735 SCTP_STAT_INCR(sctps_badsum);
5736 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5741 /* Destination port of 0 is illegal, based on RFC4960. */
5742 if (sh->dest_port == 0) {
5743 SCTP_STAT_INCR(sctps_hdrops);
5746 stcb = sctp_findassociation_addr(m, offset, src, dst,
5747 sh, ch, &inp, &net, vrf_id);
5748 #if defined(INET) || defined(INET6)
5749 if ((net != NULL) && (port != 0)) {
5750 if (net->port == 0) {
5751 sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
5757 net->flowtype = mflowtype;
5758 net->flowid = mflowid;
5761 SCTP_STAT_INCR(sctps_noport);
5762 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5765 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5766 sctp_send_shutdown_complete2(src, dst, sh,
5767 mflowtype, mflowid, fibnum,
5771 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5774 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5775 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5776 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5777 (ch->chunk_type != SCTP_INIT))) {
5778 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5780 sctp_send_abort(m, iphlen, src, dst,
5782 mflowtype, mflowid, fibnum,
5787 } else if (stcb == NULL) {
5792 * I very much doubt any of the IPSEC stuff will work but I have no
5793 * idea, so I will leave it in place.
5796 switch (dst->sa_family) {
5799 if (ipsec4_in_reject(m, &inp->ip_inp.inp)) {
5800 SCTP_STAT_INCR(sctps_hdrops);
5807 if (ipsec6_in_reject(m, &inp->ip_inp.inp)) {
5808 SCTP_STAT_INCR(sctps_hdrops);
5818 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5819 (void *)m, iphlen, offset, length, (void *)stcb);
5821 /* always clear this before beginning a packet */
5822 stcb->asoc.authenticated = 0;
5823 stcb->asoc.seen_a_sack_this_pkt = 0;
5824 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5825 (void *)stcb, stcb->asoc.state);
5827 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5828 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5830 * If we hit here, we had a ref count
5831 * up when the assoc was aborted and the
5832 * timer is clearing out the assoc, we should
5833 * NOT respond to any packet.. its OOTB.
5835 SCTP_TCB_UNLOCK(stcb);
5837 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __FUNCTION__);
5838 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5840 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5841 mflowtype, mflowid, inp->fibnum,
5846 if (IS_SCTP_CONTROL(ch)) {
5847 /* process the control portion of the SCTP packet */
5848 /* sa_ignore NO_NULL_CHK */
5849 stcb = sctp_process_control(m, iphlen, &offset, length,
5851 inp, stcb, &net, &fwd_tsn_seen,
5852 mflowtype, mflowid, fibnum,
5856 * This covers us if the cookie-echo was there and
5857 * it changes our INP.
5859 inp = stcb->sctp_ep;
5860 #if defined(INET) || defined(INET6)
5861 if ((net) && (port)) {
5862 if (net->port == 0) {
5863 sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
5871 * no control chunks, so pre-process DATA chunks (these
5872 * checks are taken care of by control processing)
5876 * if DATA only packet, and auth is required, then punt...
5877 * can't have authenticated without any AUTH (control)
5880 if ((stcb != NULL) &&
5881 (stcb->asoc.auth_supported == 1) &&
5882 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5883 /* "silently" ignore */
5884 SCTP_STAT_INCR(sctps_recvauthmissing);
5888 /* out of the blue DATA chunk */
5889 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __FUNCTION__);
5890 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5892 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5893 mflowtype, mflowid, fibnum,
5897 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5898 /* v_tag mismatch! */
5899 SCTP_STAT_INCR(sctps_badvtag);
5906 * no valid TCB for this packet, or we found it's a bad
5907 * packet while processing control, or we're done with this
5908 * packet (done or skip rest of data), so we drop it...
5913 * DATA chunk processing
5915 /* plow through the data chunks while length > offset */
5918 * Rest should be DATA only. Check authentication state if AUTH for
5921 if ((length > offset) &&
5923 (stcb->asoc.auth_supported == 1) &&
5924 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5925 !stcb->asoc.authenticated) {
5926 /* "silently" ignore */
5927 SCTP_STAT_INCR(sctps_recvauthmissing);
5928 SCTPDBG(SCTP_DEBUG_AUTH1,
5929 "Data chunk requires AUTH, skipped\n");
5932 if (length > offset) {
5936 * First check to make sure our state is correct. We would
5937 * not get here unless we really did have a tag, so we don't
5938 * abort if this happens, just dump the chunk silently.
5940 switch (SCTP_GET_STATE(&stcb->asoc)) {
5941 case SCTP_STATE_COOKIE_ECHOED:
5943 * we consider data with valid tags in this state
5944 * shows us the cookie-ack was lost. Imply it was
5947 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5948 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5949 stcb->asoc.overall_error_count,
5951 SCTP_FROM_SCTP_INPUT,
5954 stcb->asoc.overall_error_count = 0;
5955 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5957 case SCTP_STATE_COOKIE_WAIT:
5959 * We consider OOTB any data sent during asoc setup.
5961 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __FUNCTION__);
5962 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5964 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5965 mflowtype, mflowid, inp->fibnum,
5968 /* sa_ignore NOTREACHED */
5970 case SCTP_STATE_EMPTY: /* should not happen */
5971 case SCTP_STATE_INUSE: /* should not happen */
5972 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5973 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5976 /* sa_ignore NOTREACHED */
5978 case SCTP_STATE_OPEN:
5979 case SCTP_STATE_SHUTDOWN_SENT:
5982 /* plow through the data chunks while length > offset */
5983 retval = sctp_process_data(mm, iphlen, &offset, length,
5984 inp, stcb, net, &high_tsn);
5987 * The association aborted, NO UNLOCK needed since
5988 * the association is destroyed.
5995 * Anything important needs to have been m_copy'ed in
5999 /* take care of ecn */
6000 if ((data_processed == 1) &&
6001 (stcb->asoc.ecn_supported == 1) &&
6002 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
6003 /* Yep, we need to add a ECNE */
6004 sctp_send_ecn_echo(stcb, net, high_tsn);
6006 if ((data_processed == 0) && (fwd_tsn_seen)) {
6008 uint32_t highest_tsn;
6010 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
6011 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
6013 highest_tsn = stcb->asoc.highest_tsn_inside_map;
6015 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
6016 stcb->asoc.send_sack = 1;
6017 sctp_sack_check(stcb, was_a_gap);
6018 } else if (fwd_tsn_seen) {
6019 stcb->asoc.send_sack = 1;
6021 /* trigger send of any chunks in queue... */
6023 #ifdef SCTP_AUDITING_ENABLED
6024 sctp_audit_log(0xE0, 2);
6025 sctp_auditing(1, inp, stcb, net);
6027 SCTPDBG(SCTP_DEBUG_INPUT1,
6028 "Check for chunk output prw:%d tqe:%d tf=%d\n",
6029 stcb->asoc.peers_rwnd,
6030 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
6031 stcb->asoc.total_flight);
6032 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
6033 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
6034 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
6036 if (cnt_ctrl_ready ||
6038 (stcb->asoc.peers_rwnd > 0 ||
6039 (stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) {
6040 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
6041 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
6042 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
6044 #ifdef SCTP_AUDITING_ENABLED
6045 sctp_audit_log(0xE0, 3);
6046 sctp_auditing(2, inp, stcb, net);
6050 SCTP_TCB_UNLOCK(stcb);
6052 if (inp_decr != NULL) {
6053 /* reduce ref-count */
6054 SCTP_INP_WLOCK(inp_decr);
6055 SCTP_INP_DECR_REF(inp_decr);
6056 SCTP_INP_WUNLOCK(inp_decr);
6060 sctp_validate_no_locks(inp);
6068 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
6072 uint32_t vrf_id = 0;
6074 struct sockaddr_in src, dst;
6077 struct sctp_chunkhdr *ch;
6080 #if !defined(SCTP_WITH_NO_CSUM)
6081 uint8_t compute_crc;
6089 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
6090 SCTP_RELEASE_PKT(i_pak);
6093 m = SCTP_HEADER_TO_CHAIN(i_pak);
6094 #ifdef SCTP_MBUF_LOGGING
6095 /* Log in any input mbufs */
6096 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6097 sctp_log_mbc(m, SCTP_MBUF_INPUT);
6100 #ifdef SCTP_PACKET_LOGGING
6101 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
6105 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
6106 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
6108 if_name(m->m_pkthdr.rcvif),
6109 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
6110 mflowid = m->m_pkthdr.flowid;
6111 mflowtype = M_HASHTYPE_GET(m);
6112 fibnum = M_GETFIB(m);
6113 SCTP_STAT_INCR(sctps_recvpackets);
6114 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
6115 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
6116 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
6117 if (SCTP_BUF_LEN(m) < offset) {
6118 if ((m = m_pullup(m, offset)) == NULL) {
6119 SCTP_STAT_INCR(sctps_hdrops);
6123 ip = mtod(m, struct ip *);
6124 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
6125 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
6126 offset -= sizeof(struct sctp_chunkhdr);
6127 memset(&src, 0, sizeof(struct sockaddr_in));
6128 src.sin_family = AF_INET;
6129 src.sin_len = sizeof(struct sockaddr_in);
6130 src.sin_port = sh->src_port;
6131 src.sin_addr = ip->ip_src;
6132 memset(&dst, 0, sizeof(struct sockaddr_in));
6133 dst.sin_family = AF_INET;
6134 dst.sin_len = sizeof(struct sockaddr_in);
6135 dst.sin_port = sh->dest_port;
6136 dst.sin_addr = ip->ip_dst;
6137 length = ntohs(ip->ip_len);
6138 /* Validate mbuf chain length with IP payload length. */
6139 if (SCTP_HEADER_LEN(m) != length) {
6140 SCTPDBG(SCTP_DEBUG_INPUT1,
6141 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
6142 SCTP_STAT_INCR(sctps_hdrops);
6145 /* SCTP does not allow broadcasts or multicasts */
6146 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
6149 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
6152 ecn_bits = ip->ip_tos;
6153 #if defined(SCTP_WITH_NO_CSUM)
6154 SCTP_STAT_INCR(sctps_recvnocrc);
6156 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
6157 SCTP_STAT_INCR(sctps_recvhwcrc);
6160 SCTP_STAT_INCR(sctps_recvswcrc);
6164 sctp_common_input_processing(&m, iphlen, offset, length,
6165 (struct sockaddr *)&src,
6166 (struct sockaddr *)&dst,
6168 #if !defined(SCTP_WITH_NO_CSUM)
6172 mflowtype, mflowid, fibnum,
6181 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6182 extern int *sctp_cpuarry;
6187 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
6194 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6200 uint32_t flowid, tag;
6202 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
6203 flowid = m->m_pkthdr.flowid;
6206 * No flow id built by lower layers fix it so we
6209 offset = off + sizeof(struct sctphdr);
6210 if (SCTP_BUF_LEN(m) < offset) {
6211 if ((m = m_pullup(m, offset)) == NULL) {
6212 SCTP_STAT_INCR(sctps_hdrops);
6213 return (IPPROTO_DONE);
6216 ip = mtod(m, struct ip *);
6217 sh = (struct sctphdr *)((caddr_t)ip + off);
6218 tag = htonl(sh->v_tag);
6219 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
6220 m->m_pkthdr.flowid = flowid;
6221 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE);
6223 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
6224 sctp_queue_to_mcore(m, off, cpu_to_use);
6225 return (IPPROTO_DONE);
6228 sctp_input_with_port(m, off, 0);
6229 return (IPPROTO_DONE);