2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <netinet/sctp_os.h>
39 #include <netinet/sctp_var.h>
40 #include <netinet/sctp_sysctl.h>
41 #include <netinet/sctp_pcb.h>
42 #include <netinet/sctp_header.h>
43 #include <netinet/sctputil.h>
44 #include <netinet/sctp_output.h>
45 #include <netinet/sctp_input.h>
46 #include <netinet/sctp_auth.h>
47 #include <netinet/sctp_indata.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctp_bsd_addr.h>
50 #include <netinet/sctp_timer.h>
51 #include <netinet/sctp_crc32.h>
52 #include <netinet/sctp_kdtrace.h>
53 #if defined(INET) || defined(INET6)
54 #include <netinet/udp.h>
61 sctp_stop_all_cookie_timers(struct sctp_tcb *stcb)
63 struct sctp_nets *net;
66 * This now not only stops all cookie timers it also stops any INIT
67 * timers as well. This will make sure that the timers are stopped
68 * in all collision cases.
70 SCTP_TCB_LOCK_ASSERT(stcb);
71 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
72 if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) {
73 sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE,
76 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1);
77 } else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) {
78 sctp_timer_stop(SCTP_TIMER_TYPE_INIT,
81 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2);
88 sctp_handle_init(struct mbuf *m, int iphlen, int offset,
89 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
90 struct sctp_init_chunk *cp, struct sctp_inpcb *inp,
91 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_no_unlock,
92 uint8_t mflowtype, uint32_t mflowid,
93 uint32_t vrf_id, uint16_t port)
95 struct sctp_init *init;
98 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_init: handling INIT tcb:%p\n",
103 /* validate length */
104 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_chunk)) {
105 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
106 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
110 *abort_no_unlock = 1;
113 /* validate parameters */
115 if (init->initiate_tag == 0) {
116 /* protocol error... send abort */
117 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
118 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
122 *abort_no_unlock = 1;
125 if (ntohl(init->a_rwnd) < SCTP_MIN_RWND) {
126 /* invalid parameter... send abort */
127 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
128 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
132 *abort_no_unlock = 1;
135 if (init->num_inbound_streams == 0) {
136 /* protocol error... send abort */
137 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
138 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
142 *abort_no_unlock = 1;
145 if (init->num_outbound_streams == 0) {
146 /* protocol error... send abort */
147 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
148 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
152 *abort_no_unlock = 1;
155 if (sctp_validate_init_auth_params(m, offset + sizeof(*cp),
156 offset + ntohs(cp->ch.chunk_length))) {
157 /* auth parameter(s) error... send abort */
158 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
159 "Problem with AUTH parameters");
160 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
164 *abort_no_unlock = 1;
167 /* We are only accepting if we have a listening socket. */
168 if ((stcb == NULL) &&
169 ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
170 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
171 (!SCTP_IS_LISTENING(inp)))) {
173 * FIX ME ?? What about TCP model and we have a
174 * match/restart case? Actually no fix is needed. the lookup
175 * will always find the existing assoc so stcb would not be
176 * NULL. It may be questionable to do this since we COULD
177 * just send back the INIT-ACK and hope that the app did
178 * accept()'s by the time the COOKIE was sent. But there is
179 * a price to pay for COOKIE generation and I don't want to
180 * pay it on the chance that the app will actually do some
181 * accepts(). The App just looses and should NOT be in this
184 if (SCTP_BASE_SYSCTL(sctp_blackhole) == 0) {
185 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
187 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
188 mflowtype, mflowid, inp->fibnum,
193 if ((stcb != NULL) &&
194 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT)) {
195 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending SHUTDOWN-ACK\n");
196 sctp_send_shutdown_ack(stcb, NULL);
197 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
199 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending INIT-ACK\n");
200 sctp_send_initiate_ack(inp, stcb, net, m, iphlen, offset,
207 SCTP_INP_RUNLOCK(inp);
212 * process peer "INIT/INIT-ACK" chunk returns value < 0 on error
216 sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked
217 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
224 struct sctp_stream_queue_pending *sp;
225 struct sctp_association *asoc;
228 * This function returns if any stream has true unsent data on it.
229 * Note that as it looks through it will clean up any places that
230 * have old data that has been sent but left at top of stream queue.
234 SCTP_TCB_SEND_LOCK(stcb);
235 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
236 /* Check to see if some data queued */
237 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
238 /* sa_ignore FREED_MEMORY */
239 sp = TAILQ_FIRST(&stcb->asoc.strmout[i].outqueue);
243 if ((sp->msg_is_complete) &&
245 (sp->sender_all_done)) {
247 * We are doing differed cleanup. Last time
248 * through when we took all the data the
249 * sender_all_done was not set.
251 if (sp->put_last_out == 0) {
252 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
253 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
259 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
260 TAILQ_REMOVE(&stcb->asoc.strmout[i].outqueue, sp, next);
261 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, &asoc->strmout[i], sp, 1);
263 sctp_free_remote_addr(sp->net);
267 sctp_m_freem(sp->data);
270 sctp_free_a_strmoq(stcb, sp, so_locked);
271 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
277 if (unsent_data > 0) {
282 SCTP_TCB_SEND_UNLOCK(stcb);
283 return (unsent_data);
287 sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
289 struct sctp_init *init;
290 struct sctp_association *asoc;
291 struct sctp_nets *lnet;
296 /* save off parameters */
297 asoc->peer_vtag = ntohl(init->initiate_tag);
298 asoc->peers_rwnd = ntohl(init->a_rwnd);
300 asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1;
302 if (!TAILQ_EMPTY(&asoc->nets)) {
303 /* update any ssthresh's that may have a default */
304 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
305 lnet->ssthresh = asoc->peers_rwnd;
306 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
307 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION);
312 SCTP_TCB_SEND_LOCK(stcb);
313 if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) {
315 struct sctp_stream_out *outs;
316 struct sctp_stream_queue_pending *sp, *nsp;
317 struct sctp_tmit_chunk *chk, *nchk;
319 /* abandon the upper streams */
320 newcnt = ntohs(init->num_inbound_streams);
321 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
322 if (chk->rec.data.sid >= newcnt) {
323 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
324 asoc->send_queue_cnt--;
325 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
326 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
329 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
332 if (chk->data != NULL) {
333 sctp_free_bufspace(stcb, asoc, chk, 1);
334 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
335 0, chk, SCTP_SO_NOT_LOCKED);
337 sctp_m_freem(chk->data);
341 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
342 /* sa_ignore FREED_MEMORY */
346 for (i = newcnt; i < asoc->pre_open_streams; i++) {
347 outs = &asoc->strmout[i];
348 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
349 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
350 TAILQ_REMOVE(&outs->outqueue, sp, next);
351 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
352 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL,
353 stcb, 0, sp, SCTP_SO_NOT_LOCKED);
355 sctp_m_freem(sp->data);
359 sctp_free_remote_addr(sp->net);
363 sctp_free_a_strmoq(stcb, sp, SCTP_SO_NOT_LOCKED);
364 /* sa_ignore FREED_MEMORY */
366 outs->state = SCTP_STREAM_CLOSED;
369 /* cut back the count */
370 asoc->pre_open_streams = newcnt;
372 SCTP_TCB_SEND_UNLOCK(stcb);
373 asoc->streamoutcnt = asoc->pre_open_streams;
375 for (i = 0; i < asoc->streamoutcnt; i++) {
376 asoc->strmout[i].state = SCTP_STREAM_OPEN;
379 /* EY - nr_sack: initialize highest tsn in nr_mapping_array */
380 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
381 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
382 sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
384 /* This is the next one we expect */
385 asoc->str_reset_seq_in = asoc->asconf_seq_in + 1;
387 asoc->mapping_array_base_tsn = ntohl(init->initial_tsn);
388 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->asconf_seq_in;
390 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
391 /* open the requested streams */
393 if (asoc->strmin != NULL) {
394 /* Free the old ones */
395 for (i = 0; i < asoc->streamincnt; i++) {
396 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
397 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
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].sid = i;
415 asoc->strmin[i].last_mid_delivered = 0xffffffff;
416 TAILQ_INIT(&asoc->strmin[i].inqueue);
417 TAILQ_INIT(&asoc->strmin[i].uno_inqueue);
418 asoc->strmin[i].pd_api_started = 0;
419 asoc->strmin[i].delivery_started = 0;
422 * load_address_from_init will put the addresses into the
423 * association when the COOKIE is processed or the INIT-ACK is
424 * processed. Both types of COOKIE's existing and new call this
425 * routine. It will remove addresses that are no longer in the
426 * association (for the restarting case where addresses are
427 * removed). Up front when the INIT arrives we will discard it if it
428 * is a restart and new addresses have been added.
430 /* sa_ignore MEMLEAK */
435 * INIT-ACK message processing/consumption returns value < 0 on error
438 sctp_process_init_ack(struct mbuf *m, int iphlen, int offset,
439 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
440 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
441 struct sctp_nets *net, int *abort_no_unlock,
442 uint8_t mflowtype, uint32_t mflowid,
445 struct sctp_association *asoc;
447 int retval, abort_flag, cookie_found;
449 int nat_friendly = 0;
451 /* First verify that we have no illegal param's */
455 op_err = sctp_arethere_unrecognized_parameters(m,
456 (offset + sizeof(struct sctp_init_chunk)),
457 &abort_flag, (struct sctp_chunkhdr *)cp,
458 &nat_friendly, &cookie_found);
460 /* Send an abort and notify peer */
461 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
462 *abort_no_unlock = 1;
468 /* Only report the missing cookie parameter */
469 if (op_err != NULL) {
470 sctp_m_freem(op_err);
472 len = (uint16_t)(sizeof(struct sctp_error_missing_param) + sizeof(uint16_t));
473 /* We abort with an error of missing mandatory param */
474 op_err = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
475 if (op_err != NULL) {
476 struct sctp_error_missing_param *cause;
478 SCTP_BUF_LEN(op_err) = len;
479 cause = mtod(op_err, struct sctp_error_missing_param *);
480 /* Subtract the reserved param */
481 cause->cause.code = htons(SCTP_CAUSE_MISSING_PARAM);
482 cause->cause.length = htons(len);
483 cause->num_missing_params = htonl(1);
484 cause->type[0] = htons(SCTP_STATE_COOKIE);
486 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
487 src, dst, sh, op_err,
490 *abort_no_unlock = 1;
494 asoc->peer_supports_nat = (uint8_t)nat_friendly;
495 /* process the peer's parameters in the INIT-ACK */
496 retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb);
498 if (op_err != NULL) {
499 sctp_m_freem(op_err);
503 initack_limit = offset + ntohs(cp->ch.chunk_length);
504 /* load all addresses */
505 if ((retval = sctp_load_addresses_from_init(stcb, m,
506 (offset + sizeof(struct sctp_init_chunk)), initack_limit,
507 src, dst, NULL, stcb->asoc.port))) {
508 if (op_err != NULL) {
509 sctp_m_freem(op_err);
511 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
512 "Problem with address parameters");
513 SCTPDBG(SCTP_DEBUG_INPUT1,
514 "Load addresses from INIT causes an abort %d\n",
516 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
517 src, dst, sh, op_err,
520 *abort_no_unlock = 1;
523 /* if the peer doesn't support asconf, flush the asconf queue */
524 if (asoc->asconf_supported == 0) {
525 struct sctp_asconf_addr *param, *nparam;
527 TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
528 TAILQ_REMOVE(&asoc->asconf_queue, param, next);
529 SCTP_FREE(param, SCTP_M_ASC_ADDR);
533 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
534 stcb->asoc.local_hmacs);
536 sctp_queue_op_err(stcb, op_err);
537 /* queuing will steal away the mbuf chain to the out queue */
540 /* extract the cookie and queue it to "echo" it back... */
541 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
542 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
543 stcb->asoc.overall_error_count,
545 SCTP_FROM_SCTP_INPUT,
548 stcb->asoc.overall_error_count = 0;
549 net->error_count = 0;
552 * Cancel the INIT timer, We do this first before queueing the
553 * cookie. We always cancel at the primary to assue that we are
554 * canceling the timer started by the INIT which always goes to the
557 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
558 asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
560 /* calculate the RTO */
561 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
562 SCTP_RTT_FROM_NON_DATA);
563 retval = sctp_send_cookie_echo(m, offset, initack_limit, stcb, net);
568 sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp,
569 struct sctp_tcb *stcb, struct sctp_nets *net)
571 union sctp_sockstore store;
572 struct sctp_nets *r_net, *f_net;
575 uint16_t old_error_counter;
577 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) {
582 memset(&store, 0, sizeof(store));
583 switch (cp->heartbeat.hb_info.addr_family) {
586 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
587 store.sin.sin_family = cp->heartbeat.hb_info.addr_family;
588 store.sin.sin_len = cp->heartbeat.hb_info.addr_len;
589 store.sin.sin_port = stcb->rport;
590 memcpy(&store.sin.sin_addr, cp->heartbeat.hb_info.address,
591 sizeof(store.sin.sin_addr));
599 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
600 store.sin6.sin6_family = cp->heartbeat.hb_info.addr_family;
601 store.sin6.sin6_len = cp->heartbeat.hb_info.addr_len;
602 store.sin6.sin6_port = stcb->rport;
603 memcpy(&store.sin6.sin6_addr, cp->heartbeat.hb_info.address, sizeof(struct in6_addr));
612 r_net = sctp_findnet(stcb, &store.sa);
614 SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
617 if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
618 (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
619 (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
621 * If the its a HB and it's random value is correct when can
622 * confirm the destination.
624 r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
625 if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
626 stcb->asoc.primary_destination = r_net;
627 r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
628 f_net = TAILQ_FIRST(&stcb->asoc.nets);
629 if (f_net != r_net) {
631 * first one on the list is NOT the primary
632 * sctp_cmpaddr() is much more efficient if
633 * the primary is the first on the list,
636 TAILQ_REMOVE(&stcb->asoc.nets, r_net, sctp_next);
637 TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
641 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
642 stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
643 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
644 r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
645 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
647 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
648 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
649 stcb->asoc.overall_error_count,
651 SCTP_FROM_SCTP_INPUT,
654 stcb->asoc.overall_error_count = 0;
655 old_error_counter = r_net->error_count;
656 r_net->error_count = 0;
657 r_net->hb_responded = 1;
658 tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
659 tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
660 /* Now lets do a RTO with this */
661 sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv,
662 SCTP_RTT_FROM_NON_DATA);
663 if (!(r_net->dest_state & SCTP_ADDR_REACHABLE)) {
664 r_net->dest_state |= SCTP_ADDR_REACHABLE;
665 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
666 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
668 if (r_net->dest_state & SCTP_ADDR_PF) {
669 r_net->dest_state &= ~SCTP_ADDR_PF;
670 stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
672 if (old_error_counter > 0) {
673 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
674 stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5);
675 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
677 if (r_net == stcb->asoc.primary_destination) {
678 if (stcb->asoc.alternate) {
679 /* release the alternate, primary is good */
680 sctp_free_remote_addr(stcb->asoc.alternate);
681 stcb->asoc.alternate = NULL;
684 /* Mobility adaptation */
686 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
687 SCTP_MOBILITY_BASE) ||
688 sctp_is_mobility_feature_on(stcb->sctp_ep,
689 SCTP_MOBILITY_FASTHANDOFF)) &&
690 sctp_is_mobility_feature_on(stcb->sctp_ep,
691 SCTP_MOBILITY_PRIM_DELETED)) {
693 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
694 stcb->sctp_ep, stcb, NULL,
695 SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
696 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
697 SCTP_MOBILITY_FASTHANDOFF)) {
698 sctp_assoc_immediate_retrans(stcb,
699 stcb->asoc.primary_destination);
701 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
702 SCTP_MOBILITY_BASE)) {
703 sctp_move_chunks_from_net(stcb,
704 stcb->asoc.deleted_primary);
706 sctp_delete_prim_timer(stcb->sctp_ep, stcb);
712 sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
715 * Return 0 means we want you to proceed with the abort non-zero
716 * means no abort processing.
719 struct sctpasochead *head;
721 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
722 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
723 new_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
724 atomic_add_int(&stcb->asoc.refcnt, 1);
725 SCTP_TCB_UNLOCK(stcb);
726 SCTP_INP_INFO_WLOCK();
728 atomic_subtract_int(&stcb->asoc.refcnt, 1);
732 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) {
733 /* generate a new vtag and send init */
734 LIST_REMOVE(stcb, sctp_asocs);
735 stcb->asoc.my_vtag = new_vtag;
736 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
738 * put it in the bucket in the vtag hash of assoc's for the
741 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
742 SCTP_INP_INFO_WUNLOCK();
743 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
747 * treat like a case where the cookie expired i.e.: - dump
748 * current cookie. - generate a new vtag. - resend init.
750 /* generate a new vtag and send init */
751 LIST_REMOVE(stcb, sctp_asocs);
752 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
753 sctp_stop_all_cookie_timers(stcb);
754 sctp_toss_old_cookies(stcb, &stcb->asoc);
755 stcb->asoc.my_vtag = new_vtag;
756 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
758 * put it in the bucket in the vtag hash of assoc's for the
761 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
762 SCTP_INP_INFO_WUNLOCK();
763 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
770 sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
771 struct sctp_nets *net)
774 * return 0 means we want you to proceed with the abort non-zero
775 * means no abort processing
777 if (stcb->asoc.auth_supported == 0) {
778 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
781 sctp_asconf_send_nat_state_update(stcb, net);
786 /* Returns 1 if the stcb was aborted, 0 otherwise */
788 sctp_handle_abort(struct sctp_abort_chunk *abort,
789 struct sctp_tcb *stcb, struct sctp_nets *net)
791 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
797 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
801 len = ntohs(abort->ch.chunk_length);
802 if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_error_cause)) {
804 * Need to check the cause codes for our two magic nat
805 * aborts which don't kill the assoc necessarily.
807 struct sctp_error_cause *cause;
809 cause = (struct sctp_error_cause *)(abort + 1);
810 error = ntohs(cause->code);
811 if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
812 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
813 abort->ch.chunk_flags);
814 if (sctp_handle_nat_colliding_state(stcb)) {
817 } else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
818 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
819 abort->ch.chunk_flags);
820 if (sctp_handle_nat_missing_state(stcb, net)) {
827 /* stop any receive timers */
828 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
829 SCTP_FROM_SCTP_INPUT + SCTP_LOC_7);
830 /* notify user of the abort and clean up... */
831 sctp_abort_notification(stcb, 1, error, abort, SCTP_SO_NOT_LOCKED);
833 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
834 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
835 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
836 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
838 #ifdef SCTP_ASOCLOG_OF_TSNS
839 sctp_print_out_track_log(stcb);
841 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
842 so = SCTP_INP_SO(stcb->sctp_ep);
843 atomic_add_int(&stcb->asoc.refcnt, 1);
844 SCTP_TCB_UNLOCK(stcb);
845 SCTP_SOCKET_LOCK(so, 1);
847 atomic_subtract_int(&stcb->asoc.refcnt, 1);
849 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_WAS_ABORTED);
850 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
851 SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
852 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
853 SCTP_SOCKET_UNLOCK(so, 1);
855 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
860 sctp_start_net_timers(struct sctp_tcb *stcb)
862 uint32_t cnt_hb_sent;
863 struct sctp_nets *net;
866 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
868 * For each network start: 1) A pmtu timer. 2) A HB timer 3)
869 * If the dest in unconfirmed send a hb as well if under
870 * max_hb_burst have been sent.
872 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
873 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
874 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
875 (cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
876 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
881 sctp_chunk_output(stcb->sctp_ep, stcb,
882 SCTP_OUTPUT_FROM_COOKIE_ACK,
889 sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
890 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
892 struct sctp_association *asoc;
893 int some_on_streamwheel;
895 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
899 SCTPDBG(SCTP_DEBUG_INPUT2,
900 "sctp_handle_shutdown: handling SHUTDOWN\n");
904 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
905 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
908 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
909 /* Shutdown NOT the expected size */
912 old_state = SCTP_GET_STATE(stcb);
913 sctp_update_acked(stcb, cp, abort_flag);
917 if (asoc->control_pdapi) {
919 * With a normal shutdown we assume the end of last record.
921 SCTP_INP_READ_LOCK(stcb->sctp_ep);
922 if (asoc->control_pdapi->on_strm_q) {
923 struct sctp_stream_in *strm;
925 strm = &asoc->strmin[asoc->control_pdapi->sinfo_stream];
926 if (asoc->control_pdapi->on_strm_q == SCTP_ON_UNORDERED) {
928 TAILQ_REMOVE(&strm->uno_inqueue, asoc->control_pdapi, next_instrm);
929 asoc->control_pdapi->on_strm_q = 0;
930 } else if (asoc->control_pdapi->on_strm_q == SCTP_ON_ORDERED) {
932 TAILQ_REMOVE(&strm->inqueue, asoc->control_pdapi, next_instrm);
933 asoc->control_pdapi->on_strm_q = 0;
936 panic("Unknown state on ctrl:%p on_strm_q:%d",
938 asoc->control_pdapi->on_strm_q);
942 asoc->control_pdapi->end_added = 1;
943 asoc->control_pdapi->pdapi_aborted = 1;
944 asoc->control_pdapi = NULL;
945 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
946 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
947 so = SCTP_INP_SO(stcb->sctp_ep);
948 atomic_add_int(&stcb->asoc.refcnt, 1);
949 SCTP_TCB_UNLOCK(stcb);
950 SCTP_SOCKET_LOCK(so, 1);
952 atomic_subtract_int(&stcb->asoc.refcnt, 1);
953 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
954 /* assoc was freed while we were unlocked */
955 SCTP_SOCKET_UNLOCK(so, 1);
959 if (stcb->sctp_socket) {
960 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
962 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
963 SCTP_SOCKET_UNLOCK(so, 1);
966 /* goto SHUTDOWN_RECEIVED state to block new requests */
967 if (stcb->sctp_socket) {
968 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
969 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
970 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
971 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_RECEIVED);
973 * notify upper layer that peer has initiated a
976 sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
979 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
982 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) {
984 * stop the shutdown timer, since we WILL move to
987 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
988 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
990 /* Now is there unsent data on a stream somewhere? */
991 some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
993 if (!TAILQ_EMPTY(&asoc->send_queue) ||
994 !TAILQ_EMPTY(&asoc->sent_queue) ||
995 some_on_streamwheel) {
996 /* By returning we will push more data out */
999 /* no outstanding data to send, so move on... */
1000 /* send SHUTDOWN-ACK */
1001 /* move to SHUTDOWN-ACK-SENT state */
1002 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
1003 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
1004 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
1006 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
1007 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_ACK_SENT);
1008 sctp_stop_timers_for_shutdown(stcb);
1009 sctp_send_shutdown_ack(stcb, net);
1010 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK,
1011 stcb->sctp_ep, stcb, net);
1012 } else if (old_state == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1013 sctp_send_shutdown_ack(stcb, net);
1019 sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
1020 struct sctp_tcb *stcb,
1021 struct sctp_nets *net)
1023 struct sctp_association *asoc;
1024 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1027 so = SCTP_INP_SO(stcb->sctp_ep);
1029 SCTPDBG(SCTP_DEBUG_INPUT2,
1030 "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
1035 /* process according to association state */
1036 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
1037 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1038 /* unexpected SHUTDOWN-ACK... do OOTB handling... */
1039 sctp_send_shutdown_complete(stcb, net, 1);
1040 SCTP_TCB_UNLOCK(stcb);
1043 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
1044 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
1045 /* unexpected SHUTDOWN-ACK... so ignore... */
1046 SCTP_TCB_UNLOCK(stcb);
1049 if (asoc->control_pdapi) {
1051 * With a normal shutdown we assume the end of last record.
1053 SCTP_INP_READ_LOCK(stcb->sctp_ep);
1054 asoc->control_pdapi->end_added = 1;
1055 asoc->control_pdapi->pdapi_aborted = 1;
1056 asoc->control_pdapi = NULL;
1057 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
1058 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1059 atomic_add_int(&stcb->asoc.refcnt, 1);
1060 SCTP_TCB_UNLOCK(stcb);
1061 SCTP_SOCKET_LOCK(so, 1);
1062 SCTP_TCB_LOCK(stcb);
1063 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1064 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1065 /* assoc was freed while we were unlocked */
1066 SCTP_SOCKET_UNLOCK(so, 1);
1070 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
1071 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1072 SCTP_SOCKET_UNLOCK(so, 1);
1076 if (!TAILQ_EMPTY(&asoc->send_queue) ||
1077 !TAILQ_EMPTY(&asoc->sent_queue) ||
1078 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
1079 panic("Queues are not empty when handling SHUTDOWN-ACK");
1082 /* stop the timer */
1083 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net,
1084 SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
1085 /* send SHUTDOWN-COMPLETE */
1086 sctp_send_shutdown_complete(stcb, net, 0);
1087 /* notify upper layer protocol */
1088 if (stcb->sctp_socket) {
1089 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1090 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1091 stcb->sctp_socket->so_snd.sb_cc = 0;
1093 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
1095 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
1096 /* free the TCB but first save off the ep */
1097 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1098 atomic_add_int(&stcb->asoc.refcnt, 1);
1099 SCTP_TCB_UNLOCK(stcb);
1100 SCTP_SOCKET_LOCK(so, 1);
1101 SCTP_TCB_LOCK(stcb);
1102 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1104 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1105 SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
1106 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1107 SCTP_SOCKET_UNLOCK(so, 1);
1112 sctp_process_unrecog_chunk(struct sctp_tcb *stcb, uint8_t chunk_type)
1114 switch (chunk_type) {
1115 case SCTP_ASCONF_ACK:
1117 sctp_asconf_cleanup(stcb);
1119 case SCTP_IFORWARD_CUM_TSN:
1120 case SCTP_FORWARD_CUM_TSN:
1121 stcb->asoc.prsctp_supported = 0;
1124 SCTPDBG(SCTP_DEBUG_INPUT2,
1125 "Peer does not support chunk type %d (0x%x).\n",
1126 chunk_type, chunk_type);
1132 * Skip past the param header and then we will find the param that caused the
1133 * problem. There are a number of param's in a ASCONF OR the prsctp param
1134 * these will turn of specific features.
1135 * XXX: Is this the right thing to do?
1138 sctp_process_unrecog_param(struct sctp_tcb *stcb, uint16_t parameter_type)
1140 switch (parameter_type) {
1142 case SCTP_PRSCTP_SUPPORTED:
1143 stcb->asoc.prsctp_supported = 0;
1145 case SCTP_SUPPORTED_CHUNK_EXT:
1147 /* draft-ietf-tsvwg-addip-sctp */
1148 case SCTP_HAS_NAT_SUPPORT:
1149 stcb->asoc.peer_supports_nat = 0;
1151 case SCTP_ADD_IP_ADDRESS:
1152 case SCTP_DEL_IP_ADDRESS:
1153 case SCTP_SET_PRIM_ADDR:
1154 stcb->asoc.asconf_supported = 0;
1156 case SCTP_SUCCESS_REPORT:
1157 case SCTP_ERROR_CAUSE_IND:
1158 SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
1159 SCTPDBG(SCTP_DEBUG_INPUT2,
1160 "Turning off ASCONF to this strange peer\n");
1161 stcb->asoc.asconf_supported = 0;
1164 SCTPDBG(SCTP_DEBUG_INPUT2,
1165 "Peer does not support param type %d (0x%x)??\n",
1166 parameter_type, parameter_type);
1172 sctp_handle_error(struct sctp_chunkhdr *ch,
1173 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
1175 struct sctp_error_cause *cause;
1176 struct sctp_association *asoc;
1177 uint32_t remaining_length, adjust;
1178 uint16_t code, cause_code, cause_length;
1179 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1183 /* parse through all of the errors and process */
1185 cause = (struct sctp_error_cause *)((caddr_t)ch +
1186 sizeof(struct sctp_chunkhdr));
1187 remaining_length = ntohs(ch->chunk_length);
1188 if (remaining_length > limit) {
1189 remaining_length = limit;
1191 if (remaining_length >= sizeof(struct sctp_chunkhdr)) {
1192 remaining_length -= sizeof(struct sctp_chunkhdr);
1194 remaining_length = 0;
1197 while (remaining_length >= sizeof(struct sctp_error_cause)) {
1198 /* Process an Error Cause */
1199 cause_code = ntohs(cause->code);
1200 cause_length = ntohs(cause->length);
1201 if ((cause_length > remaining_length) || (cause_length == 0)) {
1202 /* Invalid cause length, possibly due to truncation. */
1203 SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in cause - bytes left: %u cause length: %u\n",
1204 remaining_length, cause_length);
1208 /* report the first error cause */
1211 switch (cause_code) {
1212 case SCTP_CAUSE_INVALID_STREAM:
1213 case SCTP_CAUSE_MISSING_PARAM:
1214 case SCTP_CAUSE_INVALID_PARAM:
1215 case SCTP_CAUSE_NO_USER_DATA:
1216 SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %u back? We have a bug :/ (or do they?)\n",
1219 case SCTP_CAUSE_NAT_COLLIDING_STATE:
1220 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags: %x\n",
1222 if (sctp_handle_nat_colliding_state(stcb)) {
1226 case SCTP_CAUSE_NAT_MISSING_STATE:
1227 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags: %x\n",
1229 if (sctp_handle_nat_missing_state(stcb, net)) {
1233 case SCTP_CAUSE_STALE_COOKIE:
1235 * We only act if we have echoed a cookie and are
1238 if ((cause_length >= sizeof(struct sctp_error_stale_cookie)) &&
1239 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1240 struct sctp_error_stale_cookie *stale_cookie;
1242 stale_cookie = (struct sctp_error_stale_cookie *)cause;
1243 asoc->cookie_preserve_req = ntohl(stale_cookie->stale_time);
1244 /* Double it to be more robust on RTX */
1245 if (asoc->cookie_preserve_req <= UINT32_MAX / 2) {
1246 asoc->cookie_preserve_req *= 2;
1248 asoc->cookie_preserve_req = UINT32_MAX;
1250 asoc->stale_cookie_count++;
1251 if (asoc->stale_cookie_count >
1252 asoc->max_init_times) {
1253 sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
1254 /* now free the asoc */
1255 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1256 so = SCTP_INP_SO(stcb->sctp_ep);
1257 atomic_add_int(&stcb->asoc.refcnt, 1);
1258 SCTP_TCB_UNLOCK(stcb);
1259 SCTP_SOCKET_LOCK(so, 1);
1260 SCTP_TCB_LOCK(stcb);
1261 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1263 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1264 SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
1265 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1266 SCTP_SOCKET_UNLOCK(so, 1);
1270 /* blast back to INIT state */
1271 sctp_toss_old_cookies(stcb, &stcb->asoc);
1272 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
1273 sctp_stop_all_cookie_timers(stcb);
1274 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
1277 case SCTP_CAUSE_UNRESOLVABLE_ADDR:
1279 * Nothing we can do here, we don't do hostname
1280 * addresses so if the peer does not like my IPv6
1281 * (or IPv4 for that matter) it does not matter. If
1282 * they don't support that type of address, they can
1283 * NOT possibly get that packet type... i.e. with no
1284 * IPv6 you can't receive a IPv6 packet. so we can
1285 * safely ignore this one. If we ever added support
1286 * for HOSTNAME Addresses, then we would need to do
1290 case SCTP_CAUSE_UNRECOG_CHUNK:
1291 if (cause_length >= sizeof(struct sctp_error_unrecognized_chunk)) {
1292 struct sctp_error_unrecognized_chunk *unrec_chunk;
1294 unrec_chunk = (struct sctp_error_unrecognized_chunk *)cause;
1295 sctp_process_unrecog_chunk(stcb, unrec_chunk->ch.chunk_type);
1298 case SCTP_CAUSE_UNRECOG_PARAM:
1299 /* XXX: We only consider the first parameter */
1300 if (cause_length >= sizeof(struct sctp_error_cause) + sizeof(struct sctp_paramhdr)) {
1301 struct sctp_paramhdr *unrec_parameter;
1303 unrec_parameter = (struct sctp_paramhdr *)(cause + 1);
1304 sctp_process_unrecog_param(stcb, ntohs(unrec_parameter->param_type));
1307 case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
1309 * We ignore this since the timer will drive out a
1310 * new cookie anyway and there timer will drive us
1311 * to send a SHUTDOWN_COMPLETE. We can't send one
1312 * here since we don't have their tag.
1315 case SCTP_CAUSE_DELETING_LAST_ADDR:
1316 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1317 case SCTP_CAUSE_DELETING_SRC_ADDR:
1319 * We should NOT get these here, but in a
1322 SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a error cause with code %u.\n",
1325 case SCTP_CAUSE_OUT_OF_RESC:
1327 * And what, pray tell do we do with the fact that
1328 * the peer is out of resources? Not really sure we
1329 * could do anything but abort. I suspect this
1330 * should have came WITH an abort instead of in a
1335 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown code 0x%x\n",
1339 adjust = SCTP_SIZE32(cause_length);
1340 if (remaining_length >= adjust) {
1341 remaining_length -= adjust;
1343 remaining_length = 0;
1345 cause = (struct sctp_error_cause *)((caddr_t)cause + adjust);
1347 sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, code, ch, SCTP_SO_NOT_LOCKED);
1352 sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
1353 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
1354 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
1355 struct sctp_nets *net, int *abort_no_unlock,
1356 uint8_t mflowtype, uint32_t mflowid,
1359 struct sctp_init_ack *init_ack;
1360 struct mbuf *op_err;
1362 SCTPDBG(SCTP_DEBUG_INPUT2,
1363 "sctp_handle_init_ack: handling INIT-ACK\n");
1366 SCTPDBG(SCTP_DEBUG_INPUT2,
1367 "sctp_handle_init_ack: TCB is null\n");
1370 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) {
1371 /* Invalid length */
1372 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1373 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1374 src, dst, sh, op_err,
1377 *abort_no_unlock = 1;
1380 init_ack = &cp->init;
1381 /* validate parameters */
1382 if (init_ack->initiate_tag == 0) {
1383 /* protocol error... send an abort */
1384 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1385 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1386 src, dst, sh, op_err,
1389 *abort_no_unlock = 1;
1392 if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) {
1393 /* protocol error... send an abort */
1394 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1395 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1396 src, dst, sh, op_err,
1399 *abort_no_unlock = 1;
1402 if (init_ack->num_inbound_streams == 0) {
1403 /* protocol error... send an abort */
1404 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1405 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1406 src, dst, sh, op_err,
1409 *abort_no_unlock = 1;
1412 if (init_ack->num_outbound_streams == 0) {
1413 /* protocol error... send an abort */
1414 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1415 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1416 src, dst, sh, op_err,
1419 *abort_no_unlock = 1;
1422 /* process according to association state... */
1423 switch (SCTP_GET_STATE(stcb)) {
1424 case SCTP_STATE_COOKIE_WAIT:
1425 /* this is the expected state for this chunk */
1426 /* process the INIT-ACK parameters */
1427 if (stcb->asoc.primary_destination->dest_state &
1428 SCTP_ADDR_UNCONFIRMED) {
1430 * The primary is where we sent the INIT, we can
1431 * always consider it confirmed when the INIT-ACK is
1432 * returned. Do this before we load addresses
1435 stcb->asoc.primary_destination->dest_state &=
1436 ~SCTP_ADDR_UNCONFIRMED;
1437 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
1438 stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
1440 if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
1441 net, abort_no_unlock,
1444 /* error in parsing parameters */
1447 /* update our state */
1448 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
1449 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_ECHOED);
1451 /* reset the RTO calc */
1452 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1453 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1454 stcb->asoc.overall_error_count,
1456 SCTP_FROM_SCTP_INPUT,
1459 stcb->asoc.overall_error_count = 0;
1460 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
1462 * collapse the init timer back in case of a exponential
1465 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
1468 * the send at the end of the inbound data processing will
1469 * cause the cookie to be sent
1472 case SCTP_STATE_SHUTDOWN_SENT:
1473 /* incorrect state... discard */
1475 case SCTP_STATE_COOKIE_ECHOED:
1476 /* incorrect state... discard */
1478 case SCTP_STATE_OPEN:
1479 /* incorrect state... discard */
1481 case SCTP_STATE_EMPTY:
1482 case SCTP_STATE_INUSE:
1484 /* incorrect state... discard */
1488 SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
1492 static struct sctp_tcb *
1493 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1494 struct sockaddr *src, struct sockaddr *dst,
1495 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1496 struct sctp_inpcb *inp, struct sctp_nets **netp,
1497 struct sockaddr *init_src, int *notification,
1498 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1499 uint8_t mflowtype, uint32_t mflowid,
1500 uint32_t vrf_id, uint16_t port);
1504 * handle a state cookie for an existing association m: input packet mbuf
1505 * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
1506 * "split" mbuf and the cookie signature does not exist offset: offset into
1507 * mbuf to the cookie-echo chunk
1509 static struct sctp_tcb *
1510 sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
1511 struct sockaddr *src, struct sockaddr *dst,
1512 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1513 struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
1514 struct sockaddr *init_src, int *notification,
1515 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1516 uint8_t mflowtype, uint32_t mflowid,
1517 uint32_t vrf_id, uint16_t port)
1519 struct sctp_association *asoc;
1520 struct sctp_init_chunk *init_cp, init_buf;
1521 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1522 struct sctp_nets *net;
1523 struct mbuf *op_err;
1525 int init_offset, initack_offset, i;
1529 #if defined(SCTP_DETAILED_STR_STATS)
1534 /* I know that the TCB is non-NULL from the caller */
1536 for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
1537 if (asoc->cookie_how[how_indx] == 0)
1540 if (how_indx < sizeof(asoc->cookie_how)) {
1541 asoc->cookie_how[how_indx] = 1;
1543 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1544 /* SHUTDOWN came in after sending INIT-ACK */
1545 sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
1546 op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
1547 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
1548 mflowtype, mflowid, inp->fibnum,
1550 if (how_indx < sizeof(asoc->cookie_how))
1551 asoc->cookie_how[how_indx] = 2;
1555 * find and validate the INIT chunk in the cookie (peer's info) the
1556 * INIT should start after the cookie-echo header struct (chunk
1557 * header, state cookie header struct)
1559 init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
1561 init_cp = (struct sctp_init_chunk *)
1562 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1563 (uint8_t *)&init_buf);
1564 if (init_cp == NULL) {
1565 /* could not pull a INIT chunk in cookie */
1568 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1572 * find and validate the INIT-ACK chunk in the cookie (my info) the
1573 * INIT-ACK follows the INIT chunk
1575 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1576 initack_cp = (struct sctp_init_ack_chunk *)
1577 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1578 (uint8_t *)&initack_buf);
1579 if (initack_cp == NULL) {
1580 /* could not pull INIT-ACK chunk in cookie */
1583 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1586 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1587 (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
1589 * case D in Section 5.2.4 Table 2: MMAA process accordingly
1590 * to get into the OPEN state
1592 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1594 * Opps, this means that we somehow generated two vtag's
1595 * the same. I.e. we did:
1597 * <---INIT(tag=a)------
1598 * ----INIT-ACK(tag=t)-->
1599 * ----INIT(tag=t)------> *1
1600 * <---INIT-ACK(tag=a)---
1601 * <----CE(tag=t)------------- *2
1603 * At point *1 we should be generating a different
1604 * tag t'. Which means we would throw away the CE and send
1605 * ours instead. Basically this is case C (throw away side).
1607 if (how_indx < sizeof(asoc->cookie_how))
1608 asoc->cookie_how[how_indx] = 17;
1612 switch (SCTP_GET_STATE(stcb)) {
1613 case SCTP_STATE_COOKIE_WAIT:
1614 case SCTP_STATE_COOKIE_ECHOED:
1616 * INIT was sent but got a COOKIE_ECHO with the
1617 * correct tags... just accept it...but we must
1618 * process the init so that we can make sure we have
1619 * the right seq no's.
1621 /* First we must process the INIT !! */
1622 retval = sctp_process_init(init_cp, stcb);
1624 if (how_indx < sizeof(asoc->cookie_how))
1625 asoc->cookie_how[how_indx] = 3;
1628 /* we have already processed the INIT so no problem */
1629 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp,
1631 SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
1632 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp,
1634 SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
1635 /* update current state */
1636 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1637 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1639 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1641 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1642 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1643 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1644 stcb->sctp_ep, stcb, NULL);
1646 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1647 sctp_stop_all_cookie_timers(stcb);
1648 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1649 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1650 (!SCTP_IS_LISTENING(inp))) {
1651 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1655 * Here is where collision would go if we
1656 * did a connect() and instead got a
1657 * init/init-ack/cookie done before the
1658 * init-ack came back..
1660 stcb->sctp_ep->sctp_flags |=
1661 SCTP_PCB_FLAGS_CONNECTED;
1662 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1663 so = SCTP_INP_SO(stcb->sctp_ep);
1664 atomic_add_int(&stcb->asoc.refcnt, 1);
1665 SCTP_TCB_UNLOCK(stcb);
1666 SCTP_SOCKET_LOCK(so, 1);
1667 SCTP_TCB_LOCK(stcb);
1668 atomic_add_int(&stcb->asoc.refcnt, -1);
1669 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1670 SCTP_SOCKET_UNLOCK(so, 1);
1674 soisconnected(stcb->sctp_socket);
1675 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1676 SCTP_SOCKET_UNLOCK(so, 1);
1679 /* notify upper layer */
1680 *notification = SCTP_NOTIFY_ASSOC_UP;
1682 * since we did not send a HB make sure we don't
1685 old.tv_sec = cookie->time_entered.tv_sec;
1686 old.tv_usec = cookie->time_entered.tv_usec;
1687 net->hb_responded = 1;
1688 sctp_calculate_rto(stcb, asoc, net, &old,
1689 SCTP_RTT_FROM_NON_DATA);
1691 if (stcb->asoc.sctp_autoclose_ticks &&
1692 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1693 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1699 * we're in the OPEN state (or beyond), so peer must
1700 * have simply lost the COOKIE-ACK
1704 sctp_stop_all_cookie_timers(stcb);
1706 * We ignore the return code here.. not sure if we should
1707 * somehow abort.. but we do have an existing asoc. This
1708 * really should not fail.
1710 if (sctp_load_addresses_from_init(stcb, m,
1711 init_offset + sizeof(struct sctp_init_chunk),
1712 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1713 if (how_indx < sizeof(asoc->cookie_how))
1714 asoc->cookie_how[how_indx] = 4;
1717 /* respond with a COOKIE-ACK */
1718 sctp_toss_old_cookies(stcb, asoc);
1719 sctp_send_cookie_ack(stcb);
1720 if (how_indx < sizeof(asoc->cookie_how))
1721 asoc->cookie_how[how_indx] = 5;
1725 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1726 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1727 cookie->tie_tag_my_vtag == 0 &&
1728 cookie->tie_tag_peer_vtag == 0) {
1730 * case C in Section 5.2.4 Table 2: XMOO silently discard
1732 if (how_indx < sizeof(asoc->cookie_how))
1733 asoc->cookie_how[how_indx] = 6;
1737 * If nat support, and the below and stcb is established, send back
1738 * a ABORT(colliding state) if we are established.
1740 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) &&
1741 (asoc->peer_supports_nat) &&
1742 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1743 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1744 (asoc->peer_vtag == 0)))) {
1746 * Special case - Peer's support nat. We may have two init's
1747 * that we gave out the same tag on since one was not
1748 * established.. i.e. we get INIT from host-1 behind the nat
1749 * and we respond tag-a, we get a INIT from host-2 behind
1750 * the nat and we get tag-a again. Then we bring up host-1
1751 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1752 * Now we have colliding state. We must send an abort here
1753 * with colliding state indication.
1755 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1756 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1757 mflowtype, mflowid, inp->fibnum,
1761 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1762 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1763 (asoc->peer_vtag == 0))) {
1765 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1766 * should be ok, re-accept peer info
1768 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1770 * Extension of case C. If we hit this, then the
1771 * random number generator returned the same vtag
1772 * when we first sent our INIT-ACK and when we later
1773 * sent our INIT. The side with the seq numbers that
1774 * are different will be the one that normnally
1775 * would have hit case C. This in effect "extends"
1776 * our vtags in this collision case to be 64 bits.
1777 * The same collision could occur aka you get both
1778 * vtag and seq number the same twice in a row.. but
1779 * is much less likely. If it did happen then we
1780 * would proceed through and bring up the assoc.. we
1781 * may end up with the wrong stream setup however..
1782 * which would be bad.. but there is no way to
1783 * tell.. until we send on a stream that does not
1786 if (how_indx < sizeof(asoc->cookie_how))
1787 asoc->cookie_how[how_indx] = 7;
1791 if (how_indx < sizeof(asoc->cookie_how))
1792 asoc->cookie_how[how_indx] = 8;
1793 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1794 SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1795 sctp_stop_all_cookie_timers(stcb);
1797 * since we did not send a HB make sure we don't double
1800 net->hb_responded = 1;
1801 if (stcb->asoc.sctp_autoclose_ticks &&
1802 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1803 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1806 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1807 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
1809 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1811 * Ok the peer probably discarded our data (if we
1812 * echoed a cookie+data). So anything on the
1813 * sent_queue should be marked for retransmit, we
1814 * may not get something to kick us so it COULD
1815 * still take a timeout to move these.. but it can't
1816 * hurt to mark them.
1818 struct sctp_tmit_chunk *chk;
1820 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1821 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1822 chk->sent = SCTP_DATAGRAM_RESEND;
1823 sctp_flight_size_decrease(chk);
1824 sctp_total_flight_decrease(stcb, chk);
1825 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1831 /* process the INIT info (peer's info) */
1832 retval = sctp_process_init(init_cp, stcb);
1834 if (how_indx < sizeof(asoc->cookie_how))
1835 asoc->cookie_how[how_indx] = 9;
1838 if (sctp_load_addresses_from_init(stcb, m,
1839 init_offset + sizeof(struct sctp_init_chunk),
1840 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1841 if (how_indx < sizeof(asoc->cookie_how))
1842 asoc->cookie_how[how_indx] = 10;
1845 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
1846 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1847 *notification = SCTP_NOTIFY_ASSOC_UP;
1849 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1850 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1851 (!SCTP_IS_LISTENING(inp))) {
1852 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1855 stcb->sctp_ep->sctp_flags |=
1856 SCTP_PCB_FLAGS_CONNECTED;
1857 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1858 so = SCTP_INP_SO(stcb->sctp_ep);
1859 atomic_add_int(&stcb->asoc.refcnt, 1);
1860 SCTP_TCB_UNLOCK(stcb);
1861 SCTP_SOCKET_LOCK(so, 1);
1862 SCTP_TCB_LOCK(stcb);
1863 atomic_add_int(&stcb->asoc.refcnt, -1);
1864 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1865 SCTP_SOCKET_UNLOCK(so, 1);
1869 soisconnected(stcb->sctp_socket);
1870 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1871 SCTP_SOCKET_UNLOCK(so, 1);
1874 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1875 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1877 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1878 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1879 } else if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1880 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1882 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1884 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1885 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1886 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1887 stcb->sctp_ep, stcb, NULL);
1889 sctp_stop_all_cookie_timers(stcb);
1890 sctp_toss_old_cookies(stcb, asoc);
1891 sctp_send_cookie_ack(stcb);
1894 * only if we have retrans set do we do this. What
1895 * this call does is get only the COOKIE-ACK out and
1896 * then when we return the normal call to
1897 * sctp_chunk_output will get the retrans out behind
1900 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1902 if (how_indx < sizeof(asoc->cookie_how))
1903 asoc->cookie_how[how_indx] = 11;
1907 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1908 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1909 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1910 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1911 cookie->tie_tag_peer_vtag != 0) {
1912 struct sctpasochead *head;
1913 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1917 if (asoc->peer_supports_nat) {
1919 * This is a gross gross hack. Just call the
1920 * cookie_new code since we are allowing a duplicate
1921 * association. I hope this works...
1923 return (sctp_process_cookie_new(m, iphlen, offset, src, dst,
1924 sh, cookie, cookie_len,
1925 inp, netp, init_src, notification,
1926 auth_skipped, auth_offset, auth_len,
1931 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1934 if (how_indx < sizeof(asoc->cookie_how))
1935 asoc->cookie_how[how_indx] = 12;
1936 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net,
1937 SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
1938 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1939 SCTP_FROM_SCTP_INPUT + SCTP_LOC_17);
1941 /* notify upper layer */
1942 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1943 atomic_add_int(&stcb->asoc.refcnt, 1);
1944 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_OPEN) &&
1945 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1946 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
1947 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1949 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1950 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1951 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1952 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1954 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1955 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1956 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1957 stcb->sctp_ep, stcb, NULL);
1959 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1960 /* move to OPEN state, if not in SHUTDOWN_SENT */
1961 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1963 asoc->pre_open_streams =
1964 ntohs(initack_cp->init.num_outbound_streams);
1965 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1966 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1967 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1969 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1971 asoc->str_reset_seq_in = asoc->init_seq_number;
1973 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1974 if (asoc->mapping_array) {
1975 memset(asoc->mapping_array, 0,
1976 asoc->mapping_array_size);
1978 if (asoc->nr_mapping_array) {
1979 memset(asoc->nr_mapping_array, 0,
1980 asoc->mapping_array_size);
1982 SCTP_TCB_UNLOCK(stcb);
1983 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1984 so = SCTP_INP_SO(stcb->sctp_ep);
1985 SCTP_SOCKET_LOCK(so, 1);
1987 SCTP_INP_INFO_WLOCK();
1988 SCTP_INP_WLOCK(stcb->sctp_ep);
1989 SCTP_TCB_LOCK(stcb);
1990 atomic_add_int(&stcb->asoc.refcnt, -1);
1991 /* send up all the data */
1992 SCTP_TCB_SEND_LOCK(stcb);
1994 sctp_report_all_outbound(stcb, 0, 1, SCTP_SO_LOCKED);
1995 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1996 stcb->asoc.strmout[i].chunks_on_queues = 0;
1997 #if defined(SCTP_DETAILED_STR_STATS)
1998 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1999 asoc->strmout[i].abandoned_sent[j] = 0;
2000 asoc->strmout[i].abandoned_unsent[j] = 0;
2003 asoc->strmout[i].abandoned_sent[0] = 0;
2004 asoc->strmout[i].abandoned_unsent[0] = 0;
2006 stcb->asoc.strmout[i].sid = i;
2007 stcb->asoc.strmout[i].next_mid_ordered = 0;
2008 stcb->asoc.strmout[i].next_mid_unordered = 0;
2009 stcb->asoc.strmout[i].last_msg_incomplete = 0;
2011 /* process the INIT-ACK info (my info) */
2012 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2013 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2015 /* pull from vtag hash */
2016 LIST_REMOVE(stcb, sctp_asocs);
2017 /* re-insert to new vtag position */
2018 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
2019 SCTP_BASE_INFO(hashasocmark))];
2021 * put it in the bucket in the vtag hash of assoc's for the
2024 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
2026 SCTP_TCB_SEND_UNLOCK(stcb);
2027 SCTP_INP_WUNLOCK(stcb->sctp_ep);
2028 SCTP_INP_INFO_WUNLOCK();
2029 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2030 SCTP_SOCKET_UNLOCK(so, 1);
2032 asoc->total_flight = 0;
2033 asoc->total_flight_count = 0;
2034 /* process the INIT info (peer's info) */
2035 retval = sctp_process_init(init_cp, stcb);
2037 if (how_indx < sizeof(asoc->cookie_how))
2038 asoc->cookie_how[how_indx] = 13;
2043 * since we did not send a HB make sure we don't double
2046 net->hb_responded = 1;
2048 if (sctp_load_addresses_from_init(stcb, m,
2049 init_offset + sizeof(struct sctp_init_chunk),
2050 initack_offset, src, dst, init_src, stcb->asoc.port)) {
2051 if (how_indx < sizeof(asoc->cookie_how))
2052 asoc->cookie_how[how_indx] = 14;
2056 /* respond with a COOKIE-ACK */
2057 sctp_stop_all_cookie_timers(stcb);
2058 sctp_toss_old_cookies(stcb, asoc);
2059 sctp_send_cookie_ack(stcb);
2060 if (how_indx < sizeof(asoc->cookie_how))
2061 asoc->cookie_how[how_indx] = 15;
2065 if (how_indx < sizeof(asoc->cookie_how))
2066 asoc->cookie_how[how_indx] = 16;
2067 /* all other cases... */
2073 * handle a state cookie for a new association m: input packet mbuf chain--
2074 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
2075 * and the cookie signature does not exist offset: offset into mbuf to the
2076 * cookie-echo chunk length: length of the cookie chunk to: where the init
2077 * was from returns a new TCB
2079 static struct sctp_tcb *
2080 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
2081 struct sockaddr *src, struct sockaddr *dst,
2082 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
2083 struct sctp_inpcb *inp, struct sctp_nets **netp,
2084 struct sockaddr *init_src, int *notification,
2085 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2086 uint8_t mflowtype, uint32_t mflowid,
2087 uint32_t vrf_id, uint16_t port)
2089 struct sctp_tcb *stcb;
2090 struct sctp_init_chunk *init_cp, init_buf;
2091 struct sctp_init_ack_chunk *initack_cp, initack_buf;
2092 union sctp_sockstore store;
2093 struct sctp_association *asoc;
2094 int init_offset, initack_offset, initack_limit;
2097 uint8_t auth_chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
2098 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2101 so = SCTP_INP_SO(inp);
2105 * find and validate the INIT chunk in the cookie (peer's info) the
2106 * INIT should start after the cookie-echo header struct (chunk
2107 * header, state cookie header struct)
2109 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
2110 init_cp = (struct sctp_init_chunk *)
2111 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
2112 (uint8_t *)&init_buf);
2113 if (init_cp == NULL) {
2114 /* could not pull a INIT chunk in cookie */
2115 SCTPDBG(SCTP_DEBUG_INPUT1,
2116 "process_cookie_new: could not pull INIT chunk hdr\n");
2119 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
2120 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
2123 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
2125 * find and validate the INIT-ACK chunk in the cookie (my info) the
2126 * INIT-ACK follows the INIT chunk
2128 initack_cp = (struct sctp_init_ack_chunk *)
2129 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
2130 (uint8_t *)&initack_buf);
2131 if (initack_cp == NULL) {
2132 /* could not pull INIT-ACK chunk in cookie */
2133 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
2136 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
2140 * NOTE: We can't use the INIT_ACK's chk_length to determine the
2141 * "initack_limit" value. This is because the chk_length field
2142 * includes the length of the cookie, but the cookie is omitted when
2143 * the INIT and INIT_ACK are tacked onto the cookie...
2145 initack_limit = offset + cookie_len;
2148 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2153 * Here we do a trick, we set in NULL for the proc/thread argument.
2154 * We do this since in effect we only use the p argument when the
2155 * socket is unbound and we must do an implicit bind. Since we are
2156 * getting a cookie, we cannot be unbound.
2158 stcb = sctp_aloc_assoc(inp, init_src, &error,
2159 ntohl(initack_cp->init.initiate_tag), vrf_id,
2160 ntohs(initack_cp->init.num_outbound_streams),
2162 (struct thread *)NULL,
2163 SCTP_DONT_INITIALIZE_AUTH_PARAMS);
2165 struct mbuf *op_err;
2167 /* memory problem? */
2168 SCTPDBG(SCTP_DEBUG_INPUT1,
2169 "process_cookie_new: no room for another TCB!\n");
2170 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2171 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2172 src, dst, sh, op_err,
2177 /* get the correct sctp_nets */
2179 *netp = sctp_findnet(stcb, init_src);
2182 /* get scope variables out of cookie */
2183 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2184 asoc->scope.site_scope = cookie->site_scope;
2185 asoc->scope.local_scope = cookie->local_scope;
2186 asoc->scope.loopback_scope = cookie->loopback_scope;
2188 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2189 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2190 struct mbuf *op_err;
2193 * Houston we have a problem. The EP changed while the
2194 * cookie was in flight. Only recourse is to abort the
2197 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2198 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2199 src, dst, sh, op_err,
2202 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2203 atomic_add_int(&stcb->asoc.refcnt, 1);
2204 SCTP_TCB_UNLOCK(stcb);
2205 SCTP_SOCKET_LOCK(so, 1);
2206 SCTP_TCB_LOCK(stcb);
2207 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2209 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2210 SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2211 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2212 SCTP_SOCKET_UNLOCK(so, 1);
2216 /* process the INIT-ACK info (my info) */
2217 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2218 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2219 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
2220 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
2221 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
2222 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
2223 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
2224 asoc->str_reset_seq_in = asoc->init_seq_number;
2226 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
2228 /* process the INIT info (peer's info) */
2230 retval = sctp_process_init(init_cp, stcb);
2234 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2235 atomic_add_int(&stcb->asoc.refcnt, 1);
2236 SCTP_TCB_UNLOCK(stcb);
2237 SCTP_SOCKET_LOCK(so, 1);
2238 SCTP_TCB_LOCK(stcb);
2239 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2241 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2242 SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2243 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2244 SCTP_SOCKET_UNLOCK(so, 1);
2248 /* load all addresses */
2249 if (sctp_load_addresses_from_init(stcb, m,
2250 init_offset + sizeof(struct sctp_init_chunk), initack_offset,
2251 src, dst, init_src, port)) {
2252 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2253 atomic_add_int(&stcb->asoc.refcnt, 1);
2254 SCTP_TCB_UNLOCK(stcb);
2255 SCTP_SOCKET_LOCK(so, 1);
2256 SCTP_TCB_LOCK(stcb);
2257 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2259 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2260 SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2261 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2262 SCTP_SOCKET_UNLOCK(so, 1);
2267 * verify any preceding AUTH chunk that was skipped
2269 /* pull the local authentication parameters from the cookie/init-ack */
2270 sctp_auth_get_cookie_params(stcb, m,
2271 initack_offset + sizeof(struct sctp_init_ack_chunk),
2272 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2274 struct sctp_auth_chunk *auth;
2276 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
2277 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2281 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2282 /* auth HMAC failed, dump the assoc and packet */
2283 SCTPDBG(SCTP_DEBUG_AUTH1,
2284 "COOKIE-ECHO: AUTH failed\n");
2285 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2286 atomic_add_int(&stcb->asoc.refcnt, 1);
2287 SCTP_TCB_UNLOCK(stcb);
2288 SCTP_SOCKET_LOCK(so, 1);
2289 SCTP_TCB_LOCK(stcb);
2290 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2292 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2293 SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
2294 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2295 SCTP_SOCKET_UNLOCK(so, 1);
2299 /* remaining chunks checked... good to go */
2300 stcb->asoc.authenticated = 1;
2305 * if we're doing ASCONFs, check to see if we have any new local
2306 * addresses that need to get added to the peer (eg. addresses
2307 * changed while cookie echo in flight). This needs to be done
2308 * after we go to the OPEN state to do the correct asconf
2309 * processing. else, make sure we have the correct addresses in our
2313 /* warning, we re-use sin, sin6, sa_store here! */
2314 /* pull in local_address (our "from" address) */
2315 switch (cookie->laddr_type) {
2317 case SCTP_IPV4_ADDRESS:
2318 /* source addr is IPv4 */
2319 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2320 store.sin.sin_family = AF_INET;
2321 store.sin.sin_len = sizeof(struct sockaddr_in);
2322 store.sin.sin_addr.s_addr = cookie->laddress[0];
2326 case SCTP_IPV6_ADDRESS:
2327 /* source addr is IPv6 */
2328 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2329 store.sin6.sin6_family = AF_INET6;
2330 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2331 store.sin6.sin6_scope_id = cookie->scope_id;
2332 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2336 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2337 atomic_add_int(&stcb->asoc.refcnt, 1);
2338 SCTP_TCB_UNLOCK(stcb);
2339 SCTP_SOCKET_LOCK(so, 1);
2340 SCTP_TCB_LOCK(stcb);
2341 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2343 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2344 SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
2345 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2346 SCTP_SOCKET_UNLOCK(so, 1);
2351 /* update current state */
2352 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2353 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2354 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2355 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2356 stcb->sctp_ep, stcb, NULL);
2358 sctp_stop_all_cookie_timers(stcb);
2359 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2360 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2362 /* set up to notify upper layer */
2363 *notification = SCTP_NOTIFY_ASSOC_UP;
2364 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2365 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2366 (!SCTP_IS_LISTENING(inp))) {
2368 * This is an endpoint that called connect() how it got a
2369 * cookie that is NEW is a bit of a mystery. It must be that
2370 * the INIT was sent, but before it got there.. a complete
2371 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2372 * should have went to the other code.. not here.. oh well..
2373 * a bit of protection is worth having..
2375 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2376 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2377 atomic_add_int(&stcb->asoc.refcnt, 1);
2378 SCTP_TCB_UNLOCK(stcb);
2379 SCTP_SOCKET_LOCK(so, 1);
2380 SCTP_TCB_LOCK(stcb);
2381 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2382 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2383 SCTP_SOCKET_UNLOCK(so, 1);
2387 soisconnected(stcb->sctp_socket);
2388 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2389 SCTP_SOCKET_UNLOCK(so, 1);
2391 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2392 (SCTP_IS_LISTENING(inp))) {
2394 * We don't want to do anything with this one. Since it is
2395 * the listening guy. The timer will get started for
2396 * accepted connections in the caller.
2400 /* since we did not send a HB make sure we don't double things */
2401 if ((netp) && (*netp))
2402 (*netp)->hb_responded = 1;
2404 if (stcb->asoc.sctp_autoclose_ticks &&
2405 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2406 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2408 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2409 if ((netp != NULL) && (*netp != NULL)) {
2412 /* calculate the RTT and set the encaps port */
2413 old.tv_sec = cookie->time_entered.tv_sec;
2414 old.tv_usec = cookie->time_entered.tv_usec;
2415 sctp_calculate_rto(stcb, asoc, *netp, &old, SCTP_RTT_FROM_NON_DATA);
2417 /* respond with a COOKIE-ACK */
2418 sctp_send_cookie_ack(stcb);
2421 * check the address lists for any ASCONFs that need to be sent
2422 * AFTER the cookie-ack is sent
2424 sctp_check_address_list(stcb, m,
2425 initack_offset + sizeof(struct sctp_init_ack_chunk),
2426 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2427 &store.sa, cookie->local_scope, cookie->site_scope,
2428 cookie->ipv4_scope, cookie->loopback_scope);
2435 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2436 * we NEED to make sure we are not already using the vtag. If so we
2437 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2438 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2439 SCTP_BASE_INFO(hashasocmark))];
2440 LIST_FOREACH(stcb, head, sctp_asocs) {
2441 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2442 -- SEND ABORT - TRY AGAIN --
2448 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2449 * existing (non-NULL) TCB
2451 static struct mbuf *
2452 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2453 struct sockaddr *src, struct sockaddr *dst,
2454 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2455 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2456 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2457 struct sctp_tcb **locked_tcb,
2458 uint8_t mflowtype, uint32_t mflowid,
2459 uint32_t vrf_id, uint16_t port)
2461 struct sctp_state_cookie *cookie;
2462 struct sctp_tcb *l_stcb = *stcb;
2463 struct sctp_inpcb *l_inp;
2464 struct sockaddr *to;
2465 struct sctp_pcb *ep;
2467 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2469 uint8_t cookie_ok = 0;
2470 unsigned int sig_offset, cookie_offset;
2471 unsigned int cookie_len;
2473 struct timeval time_expires;
2474 int notification = 0;
2475 struct sctp_nets *netl;
2476 int had_a_existing_tcb = 0;
2477 int send_int_conf = 0;
2479 struct sockaddr_in sin;
2482 struct sockaddr_in6 sin6;
2485 SCTPDBG(SCTP_DEBUG_INPUT2,
2486 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2488 if (inp_p == NULL) {
2491 cookie = &cp->cookie;
2492 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2493 cookie_len = ntohs(cp->ch.chunk_length);
2495 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2496 sizeof(struct sctp_init_chunk) +
2497 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2498 /* cookie too small */
2501 if ((cookie->peerport != sh->src_port) ||
2502 (cookie->myport != sh->dest_port) ||
2503 (cookie->my_vtag != sh->v_tag)) {
2505 * invalid ports or bad tag. Note that we always leave the
2506 * v_tag in the header in network order and when we stored
2507 * it in the my_vtag slot we also left it in network order.
2508 * This maintains the match even though it may be in the
2509 * opposite byte order of the machine :->
2514 * split off the signature into its own mbuf (since it should not be
2515 * calculated in the sctp_hmac_m() call).
2517 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2518 m_sig = m_split(m, sig_offset, M_NOWAIT);
2519 if (m_sig == NULL) {
2520 /* out of memory or ?? */
2523 #ifdef SCTP_MBUF_LOGGING
2524 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2525 sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
2530 * compute the signature/digest for the cookie
2532 ep = &(*inp_p)->sctp_ep;
2535 SCTP_TCB_UNLOCK(l_stcb);
2537 SCTP_INP_RLOCK(l_inp);
2539 SCTP_TCB_LOCK(l_stcb);
2541 /* which cookie is it? */
2542 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2543 (ep->current_secret_number != ep->last_secret_number)) {
2544 /* it's the old cookie */
2545 (void)sctp_hmac_m(SCTP_HMAC,
2546 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2547 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2549 /* it's the current cookie */
2550 (void)sctp_hmac_m(SCTP_HMAC,
2551 (uint8_t *)ep->secret_key[(int)ep->current_secret_number],
2552 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2554 /* get the signature */
2555 SCTP_INP_RUNLOCK(l_inp);
2556 sig = (uint8_t *)sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *)&tmp_sig);
2558 /* couldn't find signature */
2559 sctp_m_freem(m_sig);
2562 /* compare the received digest with the computed digest */
2563 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2564 /* try the old cookie? */
2565 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2566 (ep->current_secret_number != ep->last_secret_number)) {
2567 /* compute digest with old */
2568 (void)sctp_hmac_m(SCTP_HMAC,
2569 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2570 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2572 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2580 * Now before we continue we must reconstruct our mbuf so that
2581 * normal processing of any other chunks will work.
2587 while (SCTP_BUF_NEXT(m_at) != NULL) {
2588 m_at = SCTP_BUF_NEXT(m_at);
2590 SCTP_BUF_NEXT(m_at) = m_sig;
2593 if (cookie_ok == 0) {
2594 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2595 SCTPDBG(SCTP_DEBUG_INPUT2,
2596 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2597 (uint32_t)offset, cookie_offset, sig_offset);
2602 * check the cookie timestamps to be sure it's not stale
2604 (void)SCTP_GETTIME_TIMEVAL(&now);
2605 /* Expire time is in Ticks, so we convert to seconds */
2606 time_expires.tv_sec = cookie->time_entered.tv_sec + sctp_ticks_to_secs(cookie->cookie_life);
2607 time_expires.tv_usec = cookie->time_entered.tv_usec;
2608 if (timevalcmp(&now, &time_expires, >)) {
2609 /* cookie is stale! */
2610 struct mbuf *op_err;
2611 struct sctp_error_stale_cookie *cause;
2612 struct timeval diff;
2615 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
2616 0, M_NOWAIT, 1, MT_DATA);
2617 if (op_err == NULL) {
2622 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
2623 cause = mtod(op_err, struct sctp_error_stale_cookie *);
2624 cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
2625 cause->cause.length = htons((sizeof(struct sctp_paramhdr) +
2626 (sizeof(uint32_t))));
2628 timevalsub(&diff, &time_expires);
2629 if ((uint32_t)diff.tv_sec > UINT32_MAX / 1000000) {
2630 staleness = UINT32_MAX;
2632 staleness = diff.tv_sec * 1000000;
2634 if (UINT32_MAX - staleness >= (uint32_t)diff.tv_usec) {
2635 staleness += diff.tv_usec;
2637 staleness = UINT32_MAX;
2639 cause->stale_time = htonl(staleness);
2640 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2641 mflowtype, mflowid, l_inp->fibnum,
2646 * Now we must see with the lookup address if we have an existing
2647 * asoc. This will only happen if we were in the COOKIE-WAIT state
2648 * and a INIT collided with us and somewhere the peer sent the
2649 * cookie on another address besides the single address our assoc
2650 * had for him. In this case we will have one of the tie-tags set at
2651 * least AND the address field in the cookie can be used to look it
2655 switch (cookie->addr_type) {
2657 case SCTP_IPV6_ADDRESS:
2658 memset(&sin6, 0, sizeof(sin6));
2659 sin6.sin6_family = AF_INET6;
2660 sin6.sin6_len = sizeof(sin6);
2661 sin6.sin6_port = sh->src_port;
2662 sin6.sin6_scope_id = cookie->scope_id;
2663 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2664 sizeof(sin6.sin6_addr.s6_addr));
2665 to = (struct sockaddr *)&sin6;
2669 case SCTP_IPV4_ADDRESS:
2670 memset(&sin, 0, sizeof(sin));
2671 sin.sin_family = AF_INET;
2672 sin.sin_len = sizeof(sin);
2673 sin.sin_port = sh->src_port;
2674 sin.sin_addr.s_addr = cookie->address[0];
2675 to = (struct sockaddr *)&sin;
2679 /* This should not happen */
2682 if (*stcb == NULL) {
2683 /* Yep, lets check */
2684 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2685 if (*stcb == NULL) {
2687 * We should have only got back the same inp. If we
2688 * got back a different ep we have a problem. The
2689 * original findep got back l_inp and now
2691 if (l_inp != *inp_p) {
2692 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2695 if (*locked_tcb == NULL) {
2697 * In this case we found the assoc only
2698 * after we locked the create lock. This
2699 * means we are in a colliding case and we
2700 * must make sure that we unlock the tcb if
2701 * its one of the cases where we throw away
2702 * the incoming packets.
2704 *locked_tcb = *stcb;
2707 * We must also increment the inp ref count
2708 * since the ref_count flags was set when we
2709 * did not find the TCB, now we found it
2710 * which reduces the refcount.. we must
2711 * raise it back out to balance it all :-)
2713 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2714 if ((*stcb)->sctp_ep != l_inp) {
2715 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2716 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2722 cookie_len -= SCTP_SIGNATURE_SIZE;
2723 if (*stcb == NULL) {
2724 /* this is the "normal" case... get a new TCB */
2725 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2726 cookie, cookie_len, *inp_p,
2727 netp, to, ¬ification,
2728 auth_skipped, auth_offset, auth_len,
2732 /* this is abnormal... cookie-echo on existing TCB */
2733 had_a_existing_tcb = 1;
2734 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2736 cookie, cookie_len, *inp_p, *stcb, netp, to,
2737 ¬ification, auth_skipped, auth_offset, auth_len,
2742 if (*stcb == NULL) {
2743 /* still no TCB... must be bad cookie-echo */
2746 if (*netp != NULL) {
2747 (*netp)->flowtype = mflowtype;
2748 (*netp)->flowid = mflowid;
2751 * Ok, we built an association so confirm the address we sent the
2754 netl = sctp_findnet(*stcb, to);
2756 * This code should in theory NOT run but
2759 /* TSNH! Huh, why do I need to add this address here? */
2760 if (sctp_add_remote_addr(*stcb, to, NULL, port,
2761 SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2764 netl = sctp_findnet(*stcb, to);
2767 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2768 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2769 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2774 sctp_start_net_timers(*stcb);
2775 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2776 if (!had_a_existing_tcb ||
2777 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2779 * If we have a NEW cookie or the connect never
2780 * reached the connected state during collision we
2781 * must do the TCP accept thing.
2783 struct socket *so, *oso;
2784 struct sctp_inpcb *inp;
2786 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2788 * For a restart we will keep the same
2789 * socket, no need to do anything. I THINK!!
2791 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2792 if (send_int_conf) {
2793 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2794 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2798 oso = (*inp_p)->sctp_socket;
2799 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2800 SCTP_TCB_UNLOCK((*stcb));
2801 CURVNET_SET(oso->so_vnet);
2802 so = sonewconn(oso, 0
2805 SCTP_TCB_LOCK((*stcb));
2806 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2809 struct mbuf *op_err;
2810 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2811 struct socket *pcb_so;
2813 /* Too many sockets */
2814 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2815 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2816 sctp_abort_association(*inp_p, NULL, m, iphlen,
2817 src, dst, sh, op_err,
2820 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2821 pcb_so = SCTP_INP_SO(*inp_p);
2822 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2823 SCTP_TCB_UNLOCK((*stcb));
2824 SCTP_SOCKET_LOCK(pcb_so, 1);
2825 SCTP_TCB_LOCK((*stcb));
2826 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2828 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2829 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2830 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2831 SCTP_SOCKET_UNLOCK(pcb_so, 1);
2835 inp = (struct sctp_inpcb *)so->so_pcb;
2836 SCTP_INP_INCR_REF(inp);
2838 * We add the unbound flag here so that if we get an
2839 * soabort() before we get the move_pcb done, we
2840 * will properly cleanup.
2842 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2843 SCTP_PCB_FLAGS_CONNECTED |
2844 SCTP_PCB_FLAGS_IN_TCPPOOL |
2845 SCTP_PCB_FLAGS_UNBOUND |
2846 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2847 SCTP_PCB_FLAGS_DONT_WAKE);
2848 inp->sctp_features = (*inp_p)->sctp_features;
2849 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2850 inp->sctp_socket = so;
2851 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2852 inp->max_cwnd = (*inp_p)->max_cwnd;
2853 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2854 inp->ecn_supported = (*inp_p)->ecn_supported;
2855 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2856 inp->auth_supported = (*inp_p)->auth_supported;
2857 inp->asconf_supported = (*inp_p)->asconf_supported;
2858 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2859 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2860 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2861 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2862 inp->sctp_context = (*inp_p)->sctp_context;
2863 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2864 inp->fibnum = (*inp_p)->fibnum;
2865 inp->inp_starting_point_for_iterator = NULL;
2867 * copy in the authentication parameters from the
2870 if (inp->sctp_ep.local_hmacs)
2871 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2872 inp->sctp_ep.local_hmacs =
2873 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2874 if (inp->sctp_ep.local_auth_chunks)
2875 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2876 inp->sctp_ep.local_auth_chunks =
2877 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2880 * Now we must move it from one hash table to
2881 * another and get the tcb in the right place.
2885 * This is where the one-2-one socket is put into
2886 * the accept state waiting for the accept!
2889 SCTP_ADD_SUBSTATE(*stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
2891 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2893 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2894 SCTP_TCB_UNLOCK((*stcb));
2896 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2898 SCTP_TCB_LOCK((*stcb));
2899 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2903 * now we must check to see if we were aborted while
2904 * the move was going on and the lock/unlock
2907 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2909 * yep it was, we leave the assoc attached
2910 * to the socket since the sctp_inpcb_free()
2911 * call will send an abort for us.
2913 SCTP_INP_DECR_REF(inp);
2916 SCTP_INP_DECR_REF(inp);
2917 /* Switch over to the new guy */
2919 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2920 if (send_int_conf) {
2921 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2922 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2926 * Pull it from the incomplete queue and wake the
2929 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2930 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2931 SCTP_TCB_UNLOCK((*stcb));
2932 SCTP_SOCKET_LOCK(so, 1);
2935 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2936 SCTP_TCB_LOCK((*stcb));
2937 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2938 SCTP_SOCKET_UNLOCK(so, 1);
2944 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2946 if (send_int_conf) {
2947 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2948 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2954 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2955 struct sctp_tcb *stcb, struct sctp_nets *net)
2957 /* cp must not be used, others call this without a c-ack :-) */
2958 struct sctp_association *asoc;
2959 struct sctp_tmit_chunk *chk;
2961 SCTPDBG(SCTP_DEBUG_INPUT2,
2962 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2963 if ((stcb == NULL) || (net == NULL)) {
2968 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
2969 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
2970 asoc->overall_error_count,
2972 SCTP_FROM_SCTP_INPUT,
2975 asoc->overall_error_count = 0;
2976 sctp_stop_all_cookie_timers(stcb);
2977 /* process according to association state */
2978 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
2979 /* state change only needed when I am in right state */
2980 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2981 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2982 sctp_start_net_timers(stcb);
2983 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2984 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2985 stcb->sctp_ep, stcb, NULL);
2989 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2990 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2991 if (asoc->overall_error_count == 0) {
2992 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
2993 SCTP_RTT_FROM_NON_DATA);
2995 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2996 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2997 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2998 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2999 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3003 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
3004 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3005 so = SCTP_INP_SO(stcb->sctp_ep);
3006 atomic_add_int(&stcb->asoc.refcnt, 1);
3007 SCTP_TCB_UNLOCK(stcb);
3008 SCTP_SOCKET_LOCK(so, 1);
3009 SCTP_TCB_LOCK(stcb);
3010 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3012 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
3013 soisconnected(stcb->sctp_socket);
3015 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3016 SCTP_SOCKET_UNLOCK(so, 1);
3020 * since we did not send a HB make sure we don't double
3023 net->hb_responded = 1;
3025 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
3027 * We don't need to do the asconf thing, nor hb or
3028 * autoclose if the socket is closed.
3033 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
3037 if (stcb->asoc.sctp_autoclose_ticks &&
3038 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
3039 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
3040 stcb->sctp_ep, stcb, NULL);
3043 * send ASCONF if parameters are pending and ASCONFs are
3044 * allowed (eg. addresses changed when init/cookie echo were
3047 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
3048 (stcb->asoc.asconf_supported == 1) &&
3049 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
3050 #ifdef SCTP_TIMER_BASED_ASCONF
3051 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
3052 stcb->sctp_ep, stcb,
3053 stcb->asoc.primary_destination);
3055 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
3056 SCTP_ADDR_NOT_LOCKED);
3061 /* Toss the cookie if I can */
3062 sctp_toss_old_cookies(stcb, asoc);
3063 /* Restart the timer if we have pending data */
3064 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
3065 if (chk->whoTo != NULL) {
3070 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
3075 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
3076 struct sctp_tcb *stcb)
3078 struct sctp_nets *net;
3079 struct sctp_tmit_chunk *lchk;
3080 struct sctp_ecne_chunk bkup;
3081 uint8_t override_bit;
3082 uint32_t tsn, window_data_tsn;
3084 unsigned int pkt_cnt;
3086 len = ntohs(cp->ch.chunk_length);
3087 if ((len != sizeof(struct sctp_ecne_chunk)) &&
3088 (len != sizeof(struct old_sctp_ecne_chunk))) {
3091 if (len == sizeof(struct old_sctp_ecne_chunk)) {
3092 /* Its the old format */
3093 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
3094 bkup.num_pkts_since_cwr = htonl(1);
3097 SCTP_STAT_INCR(sctps_recvecne);
3098 tsn = ntohl(cp->tsn);
3099 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
3100 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
3102 window_data_tsn = stcb->asoc.sending_seq - 1;
3104 window_data_tsn = lchk->rec.data.tsn;
3107 /* Find where it was sent to if possible. */
3109 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
3110 if (lchk->rec.data.tsn == tsn) {
3112 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
3115 if (SCTP_TSN_GT(lchk->rec.data.tsn, tsn)) {
3121 * What to do. A previous send of a CWR was possibly lost.
3122 * See how old it is, we may have it marked on the actual
3125 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3126 if (tsn == net->last_cwr_tsn) {
3127 /* Found him, send it off */
3133 * If we reach here, we need to send a special CWR
3134 * that says hey, we did this a long time ago and
3135 * you lost the response.
3137 net = TAILQ_FIRST(&stcb->asoc.nets);
3142 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
3149 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
3150 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3152 * JRS - Use the congestion control given in the pluggable
3155 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
3157 * We reduce once every RTT. So we will only lower cwnd at
3158 * the next sending seq i.e. the window_data_tsn
3160 net->cwr_window_tsn = window_data_tsn;
3161 net->ecn_ce_pkt_cnt += pkt_cnt;
3162 net->lost_cnt = pkt_cnt;
3163 net->last_cwr_tsn = tsn;
3165 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
3166 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
3167 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3169 * Another loss in the same window update how many
3170 * marks/packets lost we have had.
3174 if (pkt_cnt > net->lost_cnt) {
3175 /* Should be the case */
3176 cnt = (pkt_cnt - net->lost_cnt);
3177 net->ecn_ce_pkt_cnt += cnt;
3179 net->lost_cnt = pkt_cnt;
3180 net->last_cwr_tsn = tsn;
3182 * Most CC functions will ignore this call, since we
3183 * are in-window yet of the initial CE the peer saw.
3185 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
3189 * We always send a CWR this way if our previous one was lost our
3190 * peer will get an update, or if it is not time again to reduce we
3191 * still get the cwr to the peer. Note we set the override when we
3192 * could not find the TSN on the chunk or the destination network.
3194 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
3198 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
3201 * Here we get a CWR from the peer. We must look in the outqueue and
3202 * make sure that we have a covered ECNE in the control chunk part.
3205 struct sctp_tmit_chunk *chk, *nchk;
3206 struct sctp_ecne_chunk *ecne;
3210 cwr_tsn = ntohl(cp->tsn);
3211 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
3212 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.control_send_queue, sctp_next, nchk) {
3213 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
3216 if ((override == 0) && (chk->whoTo != net)) {
3217 /* Must be from the right src unless override is set */
3220 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
3221 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
3222 /* this covers this ECNE, we can remove it */
3223 stcb->asoc.ecn_echo_cnt_onq--;
3224 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
3226 stcb->asoc.ctrl_queue_cnt--;
3227 sctp_m_freem(chk->data);
3229 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3230 if (override == 0) {
3238 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3239 struct sctp_tcb *stcb, struct sctp_nets *net)
3241 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3245 SCTPDBG(SCTP_DEBUG_INPUT2,
3246 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3250 /* process according to association state */
3251 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3252 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3253 SCTPDBG(SCTP_DEBUG_INPUT2,
3254 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3255 SCTP_TCB_UNLOCK(stcb);
3258 /* notify upper layer protocol */
3259 if (stcb->sctp_socket) {
3260 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3263 if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
3264 !TAILQ_EMPTY(&stcb->asoc.sent_queue) ||
3265 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
3266 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3269 /* stop the timer */
3270 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3271 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3272 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3274 SCTPDBG(SCTP_DEBUG_INPUT2,
3275 "sctp_handle_shutdown_complete: calls free-asoc\n");
3276 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3277 so = SCTP_INP_SO(stcb->sctp_ep);
3278 atomic_add_int(&stcb->asoc.refcnt, 1);
3279 SCTP_TCB_UNLOCK(stcb);
3280 SCTP_SOCKET_LOCK(so, 1);
3281 SCTP_TCB_LOCK(stcb);
3282 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3284 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3285 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3286 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3287 SCTP_SOCKET_UNLOCK(so, 1);
3293 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3294 struct sctp_nets *net, uint8_t flg)
3296 switch (desc->chunk_type) {
3298 /* find the tsn to resend (possibly */
3301 struct sctp_tmit_chunk *tp1;
3303 tsn = ntohl(desc->tsn_ifany);
3304 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3305 if (tp1->rec.data.tsn == tsn) {
3309 if (SCTP_TSN_GT(tp1->rec.data.tsn, tsn)) {
3317 * Do it the other way , aka without paying
3318 * attention to queue seq order.
3320 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3321 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3322 if (tp1->rec.data.tsn == tsn) {
3329 SCTP_STAT_INCR(sctps_pdrptsnnf);
3331 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3334 if (((flg & SCTP_BADCRC) == 0) &&
3335 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3338 if ((stcb->asoc.peers_rwnd == 0) &&
3339 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3340 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3343 if (stcb->asoc.peers_rwnd == 0 &&
3344 (flg & SCTP_FROM_MIDDLE_BOX)) {
3345 SCTP_STAT_INCR(sctps_pdrpdizrw);
3348 ddp = (uint8_t *)(mtod(tp1->data, caddr_t)+
3349 sizeof(struct sctp_data_chunk));
3353 for (iii = 0; iii < sizeof(desc->data_bytes);
3355 if (ddp[iii] != desc->data_bytes[iii]) {
3356 SCTP_STAT_INCR(sctps_pdrpbadd);
3364 * this guy had a RTO calculation
3365 * pending on it, cancel it
3367 if (tp1->whoTo->rto_needed == 0) {
3368 tp1->whoTo->rto_needed = 1;
3372 SCTP_STAT_INCR(sctps_pdrpmark);
3373 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3374 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3376 * mark it as if we were doing a FR, since
3377 * we will be getting gap ack reports behind
3378 * the info from the router.
3380 tp1->rec.data.doing_fast_retransmit = 1;
3382 * mark the tsn with what sequences can
3385 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3386 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3388 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
3391 /* restart the timer */
3392 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3394 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3395 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3398 /* fix counts and things */
3399 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3400 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3401 tp1->whoTo->flight_size,
3403 (uint32_t)(uintptr_t)stcb,
3406 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3407 sctp_flight_size_decrease(tp1);
3408 sctp_total_flight_decrease(stcb, tp1);
3410 tp1->sent = SCTP_DATAGRAM_RESEND;
3416 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3417 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3420 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3422 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3425 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3426 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3427 audit, stcb->asoc.sent_queue_retran_cnt);
3428 #ifndef SCTP_AUDITING_ENABLED
3429 stcb->asoc.sent_queue_retran_cnt = audit;
3437 struct sctp_tmit_chunk *asconf;
3439 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3441 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3446 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3447 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3448 asconf->sent = SCTP_DATAGRAM_RESEND;
3449 asconf->snd_count--;
3453 case SCTP_INITIATION:
3454 /* resend the INIT */
3455 stcb->asoc.dropped_special_cnt++;
3456 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3458 * If we can get it in, in a few attempts we do
3459 * this, otherwise we let the timer fire.
3461 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3463 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3464 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3467 case SCTP_SELECTIVE_ACK:
3468 case SCTP_NR_SELECTIVE_ACK:
3469 /* resend the sack */
3470 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3472 case SCTP_HEARTBEAT_REQUEST:
3473 /* resend a demand HB */
3474 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3476 * Only retransmit if we KNOW we wont destroy the
3479 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3483 sctp_send_shutdown(stcb, net);
3485 case SCTP_SHUTDOWN_ACK:
3486 sctp_send_shutdown_ack(stcb, net);
3488 case SCTP_COOKIE_ECHO:
3490 struct sctp_tmit_chunk *cookie;
3493 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3495 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3500 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3501 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3502 cookie->sent = SCTP_DATAGRAM_RESEND;
3503 sctp_stop_all_cookie_timers(stcb);
3507 case SCTP_COOKIE_ACK:
3508 sctp_send_cookie_ack(stcb);
3510 case SCTP_ASCONF_ACK:
3511 /* resend last asconf ack */
3512 sctp_send_asconf_ack(stcb);
3514 case SCTP_IFORWARD_CUM_TSN:
3515 case SCTP_FORWARD_CUM_TSN:
3516 send_forward_tsn(stcb, &stcb->asoc);
3518 /* can't do anything with these */
3519 case SCTP_PACKET_DROPPED:
3520 case SCTP_INITIATION_ACK: /* this should not happen */
3521 case SCTP_HEARTBEAT_ACK:
3522 case SCTP_ABORT_ASSOCIATION:
3523 case SCTP_OPERATION_ERROR:
3524 case SCTP_SHUTDOWN_COMPLETE:
3534 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3540 * We set things to 0xffffffff since this is the last delivered
3541 * sequence and we will be sending in 0 after the reset.
3544 if (number_entries) {
3545 for (i = 0; i < number_entries; i++) {
3546 temp = ntohs(list[i]);
3547 if (temp >= stcb->asoc.streamincnt) {
3550 stcb->asoc.strmin[temp].last_mid_delivered = 0xffffffff;
3554 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3555 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3558 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3562 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3567 if (number_entries > 0) {
3568 for (i = 0; i < number_entries; i++) {
3569 temp = ntohs(list[i]);
3570 if (temp >= stcb->asoc.streamoutcnt) {
3571 /* no such stream */
3574 stcb->asoc.strmout[temp].next_mid_ordered = 0;
3575 stcb->asoc.strmout[temp].next_mid_unordered = 0;
3578 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3579 stcb->asoc.strmout[i].next_mid_ordered = 0;
3580 stcb->asoc.strmout[i].next_mid_unordered = 0;
3583 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3587 sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3592 if (number_entries > 0) {
3593 for (i = 0; i < number_entries; i++) {
3594 temp = ntohs(list[i]);
3595 if (temp >= stcb->asoc.streamoutcnt) {
3596 /* no such stream */
3599 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3602 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3603 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3609 struct sctp_stream_reset_request *
3610 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3612 struct sctp_association *asoc;
3613 struct sctp_chunkhdr *ch;
3614 struct sctp_stream_reset_request *r;
3615 struct sctp_tmit_chunk *chk;
3619 if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
3620 asoc->stream_reset_outstanding = 0;
3623 if (stcb->asoc.str_reset == NULL) {
3624 asoc->stream_reset_outstanding = 0;
3627 chk = stcb->asoc.str_reset;
3628 if (chk->data == NULL) {
3632 /* he wants a copy of the chk pointer */
3635 clen = chk->send_size;
3636 ch = mtod(chk->data, struct sctp_chunkhdr *);
3637 r = (struct sctp_stream_reset_request *)(ch + 1);
3638 if (ntohl(r->request_seq) == seq) {
3642 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3643 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3644 /* move to the next one, there can only be a max of two */
3645 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3646 if (ntohl(r->request_seq) == seq) {
3650 /* that seq is not here */
3655 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3657 struct sctp_association *asoc;
3658 struct sctp_tmit_chunk *chk;
3661 chk = asoc->str_reset;
3665 asoc->str_reset = NULL;
3666 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3667 NULL, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3668 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3669 asoc->ctrl_queue_cnt--;
3671 sctp_m_freem(chk->data);
3674 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3679 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3680 uint32_t seq, uint32_t action,
3681 struct sctp_stream_reset_response *respin)
3685 struct sctp_association *asoc = &stcb->asoc;
3686 struct sctp_tmit_chunk *chk;
3687 struct sctp_stream_reset_request *req_param;
3688 struct sctp_stream_reset_out_request *req_out_param;
3689 struct sctp_stream_reset_in_request *req_in_param;
3690 uint32_t number_entries;
3692 if (asoc->stream_reset_outstanding == 0) {
3696 if (seq == stcb->asoc.str_reset_seq_out) {
3697 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3698 if (req_param != NULL) {
3699 stcb->asoc.str_reset_seq_out++;
3700 type = ntohs(req_param->ph.param_type);
3701 lparam_len = ntohs(req_param->ph.param_length);
3702 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3705 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3706 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3707 asoc->stream_reset_out_is_outstanding = 0;
3708 if (asoc->stream_reset_outstanding)
3709 asoc->stream_reset_outstanding--;
3710 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3712 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3713 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3714 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3715 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3717 * Set it up so we don't stop
3720 asoc->stream_reset_outstanding++;
3721 stcb->asoc.str_reset_seq_out--;
3722 asoc->stream_reset_out_is_outstanding = 1;
3725 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3727 if (no_clear == 0) {
3728 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3730 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3731 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3732 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3733 if (asoc->stream_reset_outstanding)
3734 asoc->stream_reset_outstanding--;
3735 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3736 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3737 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3738 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3739 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3740 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3742 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3743 /* Ok we now may have more streams */
3746 num_stream = stcb->asoc.strm_pending_add_size;
3747 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3749 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3751 stcb->asoc.strm_pending_add_size = 0;
3752 if (asoc->stream_reset_outstanding)
3753 asoc->stream_reset_outstanding--;
3754 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3755 /* Put the new streams into effect */
3758 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3759 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3761 asoc->streamoutcnt += num_stream;
3762 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3763 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3764 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3765 SCTP_STREAM_CHANGE_DENIED);
3767 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3768 SCTP_STREAM_CHANGE_FAILED);
3770 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3771 if (asoc->stream_reset_outstanding)
3772 asoc->stream_reset_outstanding--;
3773 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3774 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3775 SCTP_STREAM_CHANGE_DENIED);
3776 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3777 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3778 SCTP_STREAM_CHANGE_FAILED);
3780 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3782 * a) Adopt the new in tsn.
3784 * c) Adopt the new out-tsn
3786 struct sctp_stream_reset_response_tsn *resp;
3787 struct sctp_forward_tsn_chunk fwdtsn;
3790 if (respin == NULL) {
3794 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3797 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3798 resp = (struct sctp_stream_reset_response_tsn *)respin;
3799 asoc->stream_reset_outstanding--;
3800 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3801 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3802 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3803 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3807 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3808 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3809 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3812 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3813 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3814 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3816 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3817 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3819 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3820 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3822 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3823 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3824 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3825 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3826 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3827 SCTP_ASSOC_RESET_DENIED);
3829 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3830 SCTP_ASSOC_RESET_FAILED);
3833 /* get rid of the request and get the request flags */
3834 if (asoc->stream_reset_outstanding == 0) {
3835 sctp_clean_up_stream_reset(stcb);
3839 if (asoc->stream_reset_outstanding == 0) {
3840 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3846 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3847 struct sctp_tmit_chunk *chk,
3848 struct sctp_stream_reset_in_request *req, int trunc)
3856 * peer wants me to send a str-reset to him for my outgoing seq's if
3859 struct sctp_association *asoc = &stcb->asoc;
3861 seq = ntohl(req->request_seq);
3862 if (asoc->str_reset_seq_in == seq) {
3863 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3864 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3865 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3867 /* Can't do it, since they exceeded our buffer size */
3868 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3869 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3870 len = ntohs(req->ph.param_length);
3871 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3872 if (number_entries) {
3873 for (i = 0; i < number_entries; i++) {
3874 temp = ntohs(req->list_of_streams[i]);
3875 if (temp >= stcb->asoc.streamoutcnt) {
3876 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3879 req->list_of_streams[i] = temp;
3881 for (i = 0; i < number_entries; i++) {
3882 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3883 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3888 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3889 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3890 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3893 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3895 /* Can't do it, since we have sent one out */
3896 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3899 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3900 asoc->str_reset_seq_in++;
3901 } else if (asoc->str_reset_seq_in - 1 == seq) {
3902 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3903 } else if (asoc->str_reset_seq_in - 2 == seq) {
3904 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3906 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3908 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3912 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3913 struct sctp_tmit_chunk *chk,
3914 struct sctp_stream_reset_tsn_request *req)
3916 /* reset all in and out and update the tsn */
3918 * A) reset my str-seq's on in and out. B) Select a receive next,
3919 * and set cum-ack to it. Also process this selected number as a
3920 * fwd-tsn as well. C) set in the response my next sending seq.
3922 struct sctp_forward_tsn_chunk fwdtsn;
3923 struct sctp_association *asoc = &stcb->asoc;
3927 seq = ntohl(req->request_seq);
3928 if (asoc->str_reset_seq_in == seq) {
3929 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3930 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3931 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3933 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3934 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3935 fwdtsn.ch.chunk_flags = 0;
3936 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3937 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3941 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3942 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3943 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3945 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3946 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3947 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3948 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3949 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3950 atomic_add_int(&asoc->sending_seq, 1);
3951 /* save off historical data for retrans */
3952 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3953 asoc->last_sending_seq[0] = asoc->sending_seq;
3954 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3955 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3956 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3957 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3958 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3959 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3961 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3962 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3963 asoc->str_reset_seq_in++;
3964 } else if (asoc->str_reset_seq_in - 1 == seq) {
3965 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3966 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3967 } else if (asoc->str_reset_seq_in - 2 == seq) {
3968 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3969 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3971 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3977 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3978 struct sctp_tmit_chunk *chk,
3979 struct sctp_stream_reset_out_request *req, int trunc)
3982 int number_entries, len;
3983 struct sctp_association *asoc = &stcb->asoc;
3985 seq = ntohl(req->request_seq);
3987 /* now if its not a duplicate we process it */
3988 if (asoc->str_reset_seq_in == seq) {
3989 len = ntohs(req->ph.param_length);
3990 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3992 * the sender is resetting, handle the list issue.. we must
3993 * a) verify if we can do the reset, if so no problem b) If
3994 * we can't do the reset we must copy the request. c) queue
3995 * it, and setup the data in processor to trigger it off
3996 * when needed and dequeue all the queued data.
3998 tsn = ntohl(req->send_reset_at_tsn);
4000 /* move the reset action back one */
4001 asoc->last_reset_action[1] = asoc->last_reset_action[0];
4002 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
4003 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4005 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4006 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
4007 /* we can do it now */
4008 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
4009 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4012 * we must queue it up and thus wait for the TSN's
4013 * to arrive that are at or before tsn
4015 struct sctp_stream_reset_list *liste;
4018 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
4019 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
4020 siz, SCTP_M_STRESET);
4021 if (liste == NULL) {
4022 /* gak out of memory */
4023 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4024 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4029 liste->number_entries = number_entries;
4030 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
4031 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
4032 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
4034 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4035 asoc->str_reset_seq_in++;
4036 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4038 * one seq back, just echo back last action since my
4039 * response was lost.
4041 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4042 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4044 * two seq back, just echo back last action since my
4045 * response was lost.
4047 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4049 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4054 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
4055 struct sctp_stream_reset_add_strm *str_add)
4058 * Peer is requesting to add more streams. If its within our
4059 * max-streams we will allow it.
4061 uint32_t num_stream, i;
4063 struct sctp_association *asoc = &stcb->asoc;
4064 struct sctp_queued_to_read *ctl, *nctl;
4066 /* Get the number. */
4067 seq = ntohl(str_add->request_seq);
4068 num_stream = ntohs(str_add->number_of_streams);
4069 /* Now what would be the new total? */
4070 if (asoc->str_reset_seq_in == seq) {
4071 num_stream += stcb->asoc.streamincnt;
4072 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4073 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4074 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4075 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
4076 (num_stream > 0xffff)) {
4077 /* We must reject it they ask for to many */
4079 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4081 /* Ok, we can do that :-) */
4082 struct sctp_stream_in *oldstrm;
4084 /* save off the old */
4085 oldstrm = stcb->asoc.strmin;
4086 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
4087 (num_stream * sizeof(struct sctp_stream_in)),
4089 if (stcb->asoc.strmin == NULL) {
4090 stcb->asoc.strmin = oldstrm;
4093 /* copy off the old data */
4094 for (i = 0; i < stcb->asoc.streamincnt; i++) {
4095 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
4096 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
4097 stcb->asoc.strmin[i].sid = i;
4098 stcb->asoc.strmin[i].last_mid_delivered = oldstrm[i].last_mid_delivered;
4099 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
4100 stcb->asoc.strmin[i].pd_api_started = oldstrm[i].pd_api_started;
4101 /* now anything on those queues? */
4102 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next_instrm, nctl) {
4103 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next_instrm);
4104 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next_instrm);
4106 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].uno_inqueue, next_instrm, nctl) {
4107 TAILQ_REMOVE(&oldstrm[i].uno_inqueue, ctl, next_instrm);
4108 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].uno_inqueue, ctl, next_instrm);
4111 /* Init the new streams */
4112 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
4113 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
4114 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
4115 stcb->asoc.strmin[i].sid = i;
4116 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
4117 stcb->asoc.strmin[i].pd_api_started = 0;
4118 stcb->asoc.strmin[i].delivery_started = 0;
4120 SCTP_FREE(oldstrm, SCTP_M_STRMI);
4121 /* update the size */
4122 stcb->asoc.streamincnt = num_stream;
4123 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4124 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
4126 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4127 asoc->str_reset_seq_in++;
4128 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4130 * one seq back, just echo back last action since my
4131 * response was lost.
4133 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4134 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4136 * two seq back, just echo back last action since my
4137 * response was lost.
4139 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4141 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4147 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
4148 struct sctp_stream_reset_add_strm *str_add)
4151 * Peer is requesting to add more streams. If its within our
4152 * max-streams we will allow it.
4154 uint16_t num_stream;
4156 struct sctp_association *asoc = &stcb->asoc;
4158 /* Get the number. */
4159 seq = ntohl(str_add->request_seq);
4160 num_stream = ntohs(str_add->number_of_streams);
4161 /* Now what would be the new total? */
4162 if (asoc->str_reset_seq_in == seq) {
4163 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4164 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4165 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4166 } else if (stcb->asoc.stream_reset_outstanding) {
4167 /* We must reject it we have something pending */
4168 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
4170 /* Ok, we can do that :-) */
4173 mychk = stcb->asoc.streamoutcnt;
4174 mychk += num_stream;
4175 if (mychk < 0x10000) {
4176 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4177 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
4178 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4181 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4184 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
4185 asoc->str_reset_seq_in++;
4186 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4188 * one seq back, just echo back last action since my
4189 * response was lost.
4191 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4192 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4194 * two seq back, just echo back last action since my
4195 * response was lost.
4197 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4199 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4204 __attribute__((noinline))
4207 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
4208 struct sctp_chunkhdr *ch_req)
4210 uint16_t remaining_length, param_len, ptype;
4211 struct sctp_paramhdr pstore;
4212 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
4216 struct sctp_tmit_chunk *chk;
4217 struct sctp_chunkhdr *ch;
4218 struct sctp_paramhdr *ph;
4222 /* now it may be a reset or a reset-response */
4223 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
4225 /* setup for adding the response */
4226 sctp_alloc_a_chunk(stcb, chk);
4230 chk->copy_by_ref = 0;
4231 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
4232 chk->rec.chunk_id.can_take_data = 0;
4234 chk->asoc = &stcb->asoc;
4235 chk->no_fr_allowed = 0;
4236 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
4237 chk->book_size_scale = 0;
4238 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
4239 if (chk->data == NULL) {
4242 sctp_m_freem(chk->data);
4245 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
4248 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
4250 /* setup chunk parameters */
4251 chk->sent = SCTP_DATAGRAM_UNSENT;
4255 ch = mtod(chk->data, struct sctp_chunkhdr *);
4256 ch->chunk_type = SCTP_STREAM_RESET;
4257 ch->chunk_flags = 0;
4258 ch->chunk_length = htons(chk->send_size);
4259 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4260 offset += sizeof(struct sctp_chunkhdr);
4261 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
4262 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *)&pstore);
4267 param_len = ntohs(ph->param_length);
4268 if ((param_len > remaining_length) ||
4269 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
4270 /* bad parameter length */
4273 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
4274 (uint8_t *)&cstore);
4279 ptype = ntohs(ph->param_type);
4281 if (param_len > sizeof(cstore)) {
4286 if (num_param > SCTP_MAX_RESET_PARAMS) {
4287 /* hit the max of parameters already sorry.. */
4290 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4291 struct sctp_stream_reset_out_request *req_out;
4293 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4296 req_out = (struct sctp_stream_reset_out_request *)ph;
4298 if (stcb->asoc.stream_reset_outstanding) {
4299 seq = ntohl(req_out->response_seq);
4300 if (seq == stcb->asoc.str_reset_seq_out) {
4302 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4305 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4306 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4307 struct sctp_stream_reset_add_strm *str_add;
4309 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4312 str_add = (struct sctp_stream_reset_add_strm *)ph;
4314 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4315 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4316 struct sctp_stream_reset_add_strm *str_add;
4318 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4321 str_add = (struct sctp_stream_reset_add_strm *)ph;
4323 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4324 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4325 struct sctp_stream_reset_in_request *req_in;
4328 req_in = (struct sctp_stream_reset_in_request *)ph;
4329 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4330 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4331 struct sctp_stream_reset_tsn_request *req_tsn;
4334 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4335 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4337 goto strres_nochunk;
4341 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4342 struct sctp_stream_reset_response *resp;
4345 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4348 resp = (struct sctp_stream_reset_response *)ph;
4349 seq = ntohl(resp->response_seq);
4350 result = ntohl(resp->result);
4351 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4353 goto strres_nochunk;
4358 offset += SCTP_SIZE32(param_len);
4359 if (remaining_length >= SCTP_SIZE32(param_len)) {
4360 remaining_length -= SCTP_SIZE32(param_len);
4362 remaining_length = 0;
4366 /* we have no response free the stuff */
4367 goto strres_nochunk;
4369 /* ok we have a chunk to link in */
4370 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4373 stcb->asoc.ctrl_queue_cnt++;
4378 * Handle a router or endpoints report of a packet loss, there are two ways
4379 * to handle this, either we get the whole packet and must disect it
4380 * ourselves (possibly with truncation and or corruption) or it is a summary
4381 * from a middle box that did the disectting for us.
4384 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4385 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4387 uint32_t bottle_bw, on_queue;
4391 struct sctp_chunk_desc desc;
4392 struct sctp_chunkhdr *ch;
4394 chlen = ntohs(cp->ch.chunk_length);
4395 chlen -= sizeof(struct sctp_pktdrop_chunk);
4396 /* XXX possible chlen underflow */
4399 if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)
4400 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4402 ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr));
4403 chlen -= sizeof(struct sctphdr);
4404 /* XXX possible chlen underflow */
4405 memset(&desc, 0, sizeof(desc));
4407 trunc_len = (uint16_t)ntohs(cp->trunc_len);
4408 if (trunc_len > limit) {
4412 /* now the chunks themselves */
4413 while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) {
4414 desc.chunk_type = ch->chunk_type;
4415 /* get amount we need to move */
4416 at = ntohs(ch->chunk_length);
4417 if (at < sizeof(struct sctp_chunkhdr)) {
4418 /* corrupt chunk, maybe at the end? */
4419 SCTP_STAT_INCR(sctps_pdrpcrupt);
4422 if (trunc_len == 0) {
4423 /* we are supposed to have all of it */
4425 /* corrupt skip it */
4426 SCTP_STAT_INCR(sctps_pdrpcrupt);
4430 /* is there enough of it left ? */
4431 if (desc.chunk_type == SCTP_DATA) {
4432 if (chlen < (sizeof(struct sctp_data_chunk) +
4433 sizeof(desc.data_bytes))) {
4437 if (chlen < sizeof(struct sctp_chunkhdr)) {
4442 if (desc.chunk_type == SCTP_DATA) {
4443 /* can we get out the tsn? */
4444 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4445 SCTP_STAT_INCR(sctps_pdrpmbda);
4447 if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) {
4449 struct sctp_data_chunk *dcp;
4453 dcp = (struct sctp_data_chunk *)ch;
4454 ddp = (uint8_t *)(dcp + 1);
4455 for (iii = 0; iii < sizeof(desc.data_bytes); iii++) {
4456 desc.data_bytes[iii] = ddp[iii];
4458 desc.tsn_ifany = dcp->dp.tsn;
4460 /* nope we are done. */
4461 SCTP_STAT_INCR(sctps_pdrpnedat);
4465 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4466 SCTP_STAT_INCR(sctps_pdrpmbct);
4469 if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) {
4470 SCTP_STAT_INCR(sctps_pdrppdbrk);
4473 if (SCTP_SIZE32(at) > chlen) {
4476 chlen -= SCTP_SIZE32(at);
4477 if (chlen < sizeof(struct sctp_chunkhdr)) {
4478 /* done, none left */
4481 ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at));
4483 /* Now update any rwnd --- possibly */
4484 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4485 /* From a peer, we get a rwnd report */
4488 SCTP_STAT_INCR(sctps_pdrpfehos);
4490 bottle_bw = ntohl(cp->bottle_bw);
4491 on_queue = ntohl(cp->current_onq);
4492 if (bottle_bw && on_queue) {
4493 /* a rwnd report is in here */
4494 if (bottle_bw > on_queue)
4495 a_rwnd = bottle_bw - on_queue;
4500 stcb->asoc.peers_rwnd = 0;
4502 if (a_rwnd > stcb->asoc.total_flight) {
4503 stcb->asoc.peers_rwnd =
4504 a_rwnd - stcb->asoc.total_flight;
4506 stcb->asoc.peers_rwnd = 0;
4508 if (stcb->asoc.peers_rwnd <
4509 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4510 /* SWS sender side engages */
4511 stcb->asoc.peers_rwnd = 0;
4516 SCTP_STAT_INCR(sctps_pdrpfmbox);
4519 /* now middle boxes in sat networks get a cwnd bump */
4520 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) &&
4521 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4522 (stcb->asoc.sat_network)) {
4524 * This is debatable but for sat networks it makes sense
4525 * Note if a T3 timer has went off, we will prohibit any
4526 * changes to cwnd until we exit the t3 loss recovery.
4528 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4529 net, cp, &bottle_bw, &on_queue);
4534 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4535 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4536 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4537 * length of the complete packet outputs: - length: modified to remaining
4538 * length after control processing - netp: modified to new sctp_nets after
4539 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4540 * bad packet,...) otherwise return the tcb for this packet
4543 __attribute__((noinline))
4545 static struct sctp_tcb *
4546 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4547 struct sockaddr *src, struct sockaddr *dst,
4548 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4549 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4550 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4551 uint32_t vrf_id, uint16_t port)
4553 struct sctp_association *asoc;
4554 struct mbuf *op_err;
4555 char msg[SCTP_DIAG_INFO_LEN];
4557 int num_chunks = 0; /* number of control chunks processed */
4558 uint32_t chk_length, contiguous;
4560 int abort_no_unlock = 0;
4564 * How big should this be, and should it be alloc'd? Lets try the
4565 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4566 * until we get into jumbo grams and such..
4568 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4570 uint32_t auth_offset = 0, auth_len = 0;
4571 int auth_skipped = 0;
4573 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4577 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4578 iphlen, *offset, length, (void *)stcb);
4581 SCTP_TCB_LOCK_ASSERT(stcb);
4583 /* validate chunk header length... */
4584 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4585 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4586 ntohs(ch->chunk_length));
4591 * validate the verification tag
4593 vtag_in = ntohl(sh->v_tag);
4595 if (ch->chunk_type == SCTP_INITIATION) {
4596 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4597 ntohs(ch->chunk_length), vtag_in);
4599 /* protocol error- silently discard... */
4600 SCTP_STAT_INCR(sctps_badvtag);
4602 SCTP_TCB_UNLOCK(stcb);
4606 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4608 * If there is no stcb, skip the AUTH chunk and process
4609 * later after a stcb is found (to validate the lookup was
4612 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4614 (inp->auth_supported == 1)) {
4615 /* save this chunk for later processing */
4617 auth_offset = *offset;
4618 auth_len = ntohs(ch->chunk_length);
4620 /* (temporarily) move past this chunk */
4621 *offset += SCTP_SIZE32(auth_len);
4622 if (*offset >= length) {
4623 /* no more data left in the mbuf chain */
4627 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4628 sizeof(struct sctp_chunkhdr), chunk_buf);
4635 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4636 goto process_control_chunks;
4639 * first check if it's an ASCONF with an unknown src addr we
4640 * need to look inside to find the association
4642 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4643 struct sctp_chunkhdr *asconf_ch = ch;
4644 uint32_t asconf_offset = 0, asconf_len = 0;
4646 /* inp's refcount may be reduced */
4647 SCTP_INP_INCR_REF(inp);
4649 asconf_offset = *offset;
4651 asconf_len = ntohs(asconf_ch->chunk_length);
4652 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4654 stcb = sctp_findassociation_ep_asconf(m,
4657 sh, &inp, netp, vrf_id);
4660 asconf_offset += SCTP_SIZE32(asconf_len);
4661 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4662 sizeof(struct sctp_chunkhdr), chunk_buf);
4663 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4666 * reduce inp's refcount if not reduced in
4667 * sctp_findassociation_ep_asconf().
4669 SCTP_INP_DECR_REF(inp);
4672 /* now go back and verify any auth chunk to be sure */
4673 if (auth_skipped && (stcb != NULL)) {
4674 struct sctp_auth_chunk *auth;
4676 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
4677 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, chunk_buf);
4683 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4685 /* auth HMAC failed so dump it */
4689 /* remaining chunks are HMAC checked */
4690 stcb->asoc.authenticated = 1;
4695 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4696 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4698 /* no association, so it's out of the blue... */
4699 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4700 mflowtype, mflowid, inp->fibnum,
4706 /* ABORT and SHUTDOWN can use either v_tag... */
4707 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4708 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4709 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4710 /* Take the T-bit always into account. */
4711 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4712 (vtag_in == asoc->my_vtag)) ||
4713 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4714 (asoc->peer_vtag != htonl(0)) &&
4715 (vtag_in == asoc->peer_vtag))) {
4718 /* drop this packet... */
4719 SCTP_STAT_INCR(sctps_badvtag);
4721 SCTP_TCB_UNLOCK(stcb);
4725 } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
4726 if (vtag_in != asoc->my_vtag) {
4728 * this could be a stale SHUTDOWN-ACK or the
4729 * peer never got the SHUTDOWN-COMPLETE and
4730 * is still hung; we have started a new asoc
4731 * but it won't complete until the shutdown
4735 SCTP_TCB_UNLOCK(stcb);
4737 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4738 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4740 sctp_handle_ootb(m, iphlen, *offset, src, dst,
4742 mflowtype, mflowid, fibnum,
4747 /* for all other chunks, vtag must match */
4748 if (vtag_in != asoc->my_vtag) {
4749 /* invalid vtag... */
4750 SCTPDBG(SCTP_DEBUG_INPUT3,
4751 "invalid vtag: %xh, expect %xh\n",
4752 vtag_in, asoc->my_vtag);
4753 SCTP_STAT_INCR(sctps_badvtag);
4755 SCTP_TCB_UNLOCK(stcb);
4761 } /* end if !SCTP_COOKIE_ECHO */
4763 * process all control chunks...
4765 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4766 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4767 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4768 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
4769 /* implied cookie-ack.. we must have lost the ack */
4770 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4774 process_control_chunks:
4775 while (IS_SCTP_CONTROL(ch)) {
4776 /* validate chunk length */
4777 chk_length = ntohs(ch->chunk_length);
4778 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4779 ch->chunk_type, chk_length);
4780 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4781 if (chk_length < sizeof(*ch) ||
4782 (*offset + (int)chk_length) > length) {
4786 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4788 * INIT and INIT-ACK only gets the init ack "header" portion
4789 * only because we don't have to process the peer's COOKIE.
4790 * All others get a complete chunk.
4792 switch (ch->chunk_type) {
4793 case SCTP_INITIATION:
4794 contiguous = sizeof(struct sctp_init_chunk);
4796 case SCTP_INITIATION_ACK:
4797 contiguous = sizeof(struct sctp_init_ack_chunk);
4800 contiguous = min(chk_length, sizeof(chunk_buf));
4803 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4809 SCTP_TCB_UNLOCK(stcb);
4815 /* Save off the last place we got a control from */
4817 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4819 * allow last_control to be NULL if
4820 * ASCONF... ASCONF processing will find the
4823 if ((netp != NULL) && (*netp != NULL))
4824 stcb->asoc.last_control_chunk_from = *netp;
4827 #ifdef SCTP_AUDITING_ENABLED
4828 sctp_audit_log(0xB0, ch->chunk_type);
4831 /* check to see if this chunk required auth, but isn't */
4832 if ((stcb != NULL) &&
4833 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4834 !stcb->asoc.authenticated) {
4835 /* "silently" ignore */
4836 SCTP_STAT_INCR(sctps_recvauthmissing);
4839 switch (ch->chunk_type) {
4840 case SCTP_INITIATION:
4841 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4842 /* The INIT chunk must be the only chunk. */
4843 if ((num_chunks > 1) ||
4844 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4845 /* RFC 4960 requires that no ABORT is sent */
4848 SCTP_TCB_UNLOCK(stcb);
4852 /* Honor our resource limit. */
4853 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4854 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4855 sctp_abort_association(inp, stcb, m, iphlen,
4856 src, dst, sh, op_err,
4862 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4863 (struct sctp_init_chunk *)ch, inp,
4864 stcb, *netp, &abort_no_unlock,
4868 if ((!abort_no_unlock) && (stcb != NULL)) {
4869 SCTP_TCB_UNLOCK(stcb);
4873 case SCTP_PAD_CHUNK:
4875 case SCTP_INITIATION_ACK:
4876 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT_ACK\n");
4877 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4878 /* We are not interested anymore */
4879 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size)) {
4884 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4885 so = SCTP_INP_SO(inp);
4886 atomic_add_int(&stcb->asoc.refcnt, 1);
4887 SCTP_TCB_UNLOCK(stcb);
4888 SCTP_SOCKET_LOCK(so, 1);
4889 SCTP_TCB_LOCK(stcb);
4890 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4892 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4893 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4894 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4895 SCTP_SOCKET_UNLOCK(so, 1);
4901 /* The INIT-ACK chunk must be the only chunk. */
4902 if ((num_chunks > 1) ||
4903 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4907 if ((netp != NULL) && (*netp != NULL)) {
4908 ret = sctp_handle_init_ack(m, iphlen, *offset,
4910 (struct sctp_init_ack_chunk *)ch,
4919 if (abort_no_unlock) {
4923 * Special case, I must call the output routine to
4924 * get the cookie echoed
4926 if ((stcb != NULL) && (ret == 0)) {
4927 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4931 case SCTP_SELECTIVE_ACK:
4932 case SCTP_NR_SELECTIVE_ACK:
4935 uint32_t a_rwnd, cum_ack;
4936 uint16_t num_seg, num_nr_seg, num_dup;
4938 int offset_seg, offset_dup;
4940 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
4941 ch->chunk_type == SCTP_SELECTIVE_ACK ? "SCTP_SACK" : "SCTP_NR_SACK");
4942 SCTP_STAT_INCR(sctps_recvsacks);
4944 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing %s chunk\n",
4945 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK");
4948 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4949 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4950 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4954 if (stcb->asoc.nrsack_supported == 0) {
4957 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4958 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR_SACK chunk, too small\n");
4962 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4964 * If we have sent a shutdown-ack, we will pay no
4965 * attention to a sack sent in to us since
4966 * we don't care anymore.
4970 flags = ch->chunk_flags;
4971 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4972 struct sctp_sack_chunk *sack;
4974 sack = (struct sctp_sack_chunk *)ch;
4975 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4976 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4978 num_dup = ntohs(sack->sack.num_dup_tsns);
4979 a_rwnd = ntohl(sack->sack.a_rwnd);
4980 if (sizeof(struct sctp_sack_chunk) +
4981 num_seg * sizeof(struct sctp_gap_ack_block) +
4982 num_dup * sizeof(uint32_t) != chk_length) {
4983 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4986 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4987 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4989 struct sctp_nr_sack_chunk *nr_sack;
4991 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4992 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4993 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4994 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4995 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4996 a_rwnd = ntohl(nr_sack->nr_sack.a_rwnd);
4997 if (sizeof(struct sctp_nr_sack_chunk) +
4998 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4999 num_dup * sizeof(uint32_t) != chk_length) {
5000 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
5003 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
5004 offset_dup = offset_seg + (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block);
5006 SCTPDBG(SCTP_DEBUG_INPUT3, "%s process cum_ack:%x num_seg:%d a_rwnd:%d\n",
5007 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK",
5008 cum_ack, num_seg, a_rwnd);
5009 stcb->asoc.seen_a_sack_this_pkt = 1;
5010 if ((stcb->asoc.pr_sctp_cnt == 0) &&
5011 (num_seg == 0) && (num_nr_seg == 0) &&
5012 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
5013 (stcb->asoc.saw_sack_with_frags == 0) &&
5014 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
5015 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
5017 * We have a SIMPLE sack having no
5018 * prior segments and data on sent
5019 * queue to be acked. Use the faster
5020 * path sack processing. We also
5021 * allow window update sacks with no
5022 * missing segments to go this way
5025 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
5026 &abort_now, ecne_seen);
5028 if ((netp != NULL) && (*netp != NULL)) {
5029 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
5030 num_seg, num_nr_seg, num_dup, &abort_now, flags,
5031 cum_ack, a_rwnd, ecne_seen);
5035 /* ABORT signal from sack processing */
5039 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
5040 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
5041 (stcb->asoc.stream_queue_cnt == 0)) {
5042 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
5046 case SCTP_HEARTBEAT_REQUEST:
5047 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
5048 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5049 SCTP_STAT_INCR(sctps_recvheartbeat);
5050 sctp_send_heartbeat_ack(stcb, m, *offset,
5054 case SCTP_HEARTBEAT_ACK:
5055 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT_ACK\n");
5056 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
5061 SCTP_STAT_INCR(sctps_recvheartbeatack);
5062 if ((netp != NULL) && (*netp != NULL)) {
5063 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
5067 case SCTP_ABORT_ASSOCIATION:
5068 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
5071 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5072 if (sctp_handle_abort((struct sctp_abort_chunk *)ch, stcb, *netp)) {
5082 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
5084 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
5088 if ((netp != NULL) && (*netp != NULL)) {
5091 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
5092 stcb, *netp, &abort_flag);
5099 case SCTP_SHUTDOWN_ACK:
5100 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_ACK, stcb %p\n", (void *)stcb);
5101 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5102 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
5107 case SCTP_OPERATION_ERROR:
5108 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP_ERR\n");
5109 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL) &&
5110 sctp_handle_error(ch, stcb, *netp, contiguous) < 0) {
5115 case SCTP_COOKIE_ECHO:
5116 SCTPDBG(SCTP_DEBUG_INPUT3,
5117 "SCTP_COOKIE_ECHO, stcb %p\n", (void *)stcb);
5118 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size > 0)) {
5121 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5122 /* We are not interested anymore */
5125 SCTP_TCB_UNLOCK(stcb);
5132 * First are we accepting? We do this again here
5133 * since it is possible that a previous endpoint WAS
5134 * listening responded to a INIT-ACK and then
5135 * closed. We opened and bound.. and are now no
5138 * XXXGL: notes on checking listen queue length.
5139 * 1) SCTP_IS_LISTENING() doesn't necessarily mean
5140 * SOLISTENING(), because a listening "UDP type"
5141 * socket isn't listening in terms of the socket
5142 * layer. It is a normal data flow socket, that
5143 * can fork off new connections. Thus, we should
5144 * look into sol_qlen only in case we are !UDP.
5145 * 2) Checking sol_qlen in general requires locking
5146 * the socket, and this code lacks that.
5148 if ((stcb == NULL) &&
5149 (!SCTP_IS_LISTENING(inp) ||
5150 (!(inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) &&
5151 inp->sctp_socket->sol_qlen >= inp->sctp_socket->sol_qlimit))) {
5152 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
5153 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
5154 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
5155 sctp_abort_association(inp, stcb, m, iphlen,
5156 src, dst, sh, op_err,
5163 struct mbuf *ret_buf;
5164 struct sctp_inpcb *linp;
5165 struct sctp_tmit_chunk *chk;
5174 SCTP_ASOC_CREATE_LOCK(linp);
5175 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
5176 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
5177 SCTP_ASOC_CREATE_UNLOCK(linp);
5183 struct sctp_tcb *locked_stcb;
5187 sctp_handle_cookie_echo(m, iphlen,
5191 (struct sctp_cookie_echo_chunk *)ch,
5201 if ((locked_stcb != NULL) && (locked_stcb != stcb)) {
5202 SCTP_TCB_UNLOCK(locked_stcb);
5205 SCTP_TCB_LOCK_ASSERT(stcb);
5211 SCTP_ASOC_CREATE_UNLOCK(linp);
5213 if (ret_buf == NULL) {
5215 SCTP_TCB_UNLOCK(stcb);
5217 SCTPDBG(SCTP_DEBUG_INPUT3,
5218 "GAK, null buffer\n");
5222 /* if AUTH skipped, see if it verified... */
5227 /* Restart the timer if we have pending data */
5228 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
5229 if (chk->whoTo != NULL) {
5234 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
5238 case SCTP_COOKIE_ACK:
5239 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE_ACK, stcb %p\n", (void *)stcb);
5240 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
5243 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5244 /* We are not interested anymore */
5245 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
5248 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5249 so = SCTP_INP_SO(inp);
5250 atomic_add_int(&stcb->asoc.refcnt, 1);
5251 SCTP_TCB_UNLOCK(stcb);
5252 SCTP_SOCKET_LOCK(so, 1);
5253 SCTP_TCB_LOCK(stcb);
5254 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5256 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5257 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
5258 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5259 SCTP_SOCKET_UNLOCK(so, 1);
5265 if ((netp != NULL) && (*netp != NULL)) {
5266 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
5270 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_ECHO\n");
5271 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_ecne_chunk))) {
5276 if (stcb->asoc.ecn_supported == 0) {
5279 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, stcb);
5283 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_CWR\n");
5284 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_cwr_chunk))) {
5288 if (stcb->asoc.ecn_supported == 0) {
5291 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5293 case SCTP_SHUTDOWN_COMPLETE:
5294 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_COMPLETE, stcb %p\n", (void *)stcb);
5295 /* must be first and only chunk */
5296 if ((num_chunks > 1) ||
5297 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5301 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5302 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5309 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5311 if (stcb->asoc.asconf_supported == 0) {
5314 sctp_handle_asconf(m, *offset, src,
5315 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5319 case SCTP_ASCONF_ACK:
5320 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF_ACK\n");
5321 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5326 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5327 if (stcb->asoc.asconf_supported == 0) {
5330 /* He's alive so give him credit */
5331 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5332 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5333 stcb->asoc.overall_error_count,
5335 SCTP_FROM_SCTP_INPUT,
5338 stcb->asoc.overall_error_count = 0;
5339 sctp_handle_asconf_ack(m, *offset,
5340 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5341 if (abort_no_unlock)
5345 case SCTP_FORWARD_CUM_TSN:
5346 case SCTP_IFORWARD_CUM_TSN:
5347 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_FWD_TSN\n");
5348 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5357 if (stcb->asoc.prsctp_supported == 0) {
5361 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5362 /* We are not interested anymore */
5363 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5364 so = SCTP_INP_SO(inp);
5365 atomic_add_int(&stcb->asoc.refcnt, 1);
5366 SCTP_TCB_UNLOCK(stcb);
5367 SCTP_SOCKET_LOCK(so, 1);
5368 SCTP_TCB_LOCK(stcb);
5369 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5371 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5372 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5373 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5374 SCTP_SOCKET_UNLOCK(so, 1);
5380 * For sending a SACK this looks like DATA
5383 stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
5384 sctp_handle_forward_tsn(stcb,
5385 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5392 case SCTP_STREAM_RESET:
5393 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5394 if (((stcb == NULL) || (ch == NULL) || (chk_length < sizeof(struct sctp_stream_reset_tsn_req)))) {
5399 if (stcb->asoc.reconfig_supported == 0) {
5402 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5403 /* stop processing */
5408 case SCTP_PACKET_DROPPED:
5409 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5410 /* re-get it all please */
5411 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5417 if ((ch != NULL) && (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5418 if (stcb->asoc.pktdrop_supported == 0) {
5421 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5423 min(chk_length, contiguous));
5426 case SCTP_AUTHENTICATION:
5427 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5429 /* save the first AUTH for later processing */
5430 if (auth_skipped == 0) {
5431 auth_offset = *offset;
5432 auth_len = chk_length;
5435 /* skip this chunk (temporarily) */
5438 if (stcb->asoc.auth_supported == 0) {
5441 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5442 (chk_length > (sizeof(struct sctp_auth_chunk) +
5443 SCTP_AUTH_DIGEST_LEN_MAX))) {
5448 if (got_auth == 1) {
5449 /* skip this chunk... it's already auth'd */
5453 if ((ch == NULL) || sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch,
5455 /* auth HMAC failed so dump the packet */
5459 /* remaining chunks are HMAC checked */
5460 stcb->asoc.authenticated = 1;
5466 /* it's an unknown chunk! */
5467 if ((ch->chunk_type & 0x40) && (stcb != NULL)) {
5468 struct sctp_gen_error_cause *cause;
5471 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
5472 0, M_NOWAIT, 1, MT_DATA);
5473 if (op_err != NULL) {
5474 len = min(SCTP_SIZE32(chk_length), (uint32_t)(length - *offset));
5475 cause = mtod(op_err, struct sctp_gen_error_cause *);
5476 cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5477 cause->length = htons((uint16_t)(len + sizeof(struct sctp_gen_error_cause)));
5478 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5479 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5480 if (SCTP_BUF_NEXT(op_err) != NULL) {
5481 #ifdef SCTP_MBUF_LOGGING
5482 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5483 sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
5486 sctp_queue_op_err(stcb, op_err);
5488 sctp_m_freem(op_err);
5492 if ((ch->chunk_type & 0x80) == 0) {
5493 /* discard this packet */
5496 } /* else skip this bad chunk and continue... */
5498 } /* switch (ch->chunk_type) */
5502 /* get the next chunk */
5503 *offset += SCTP_SIZE32(chk_length);
5504 if (*offset >= length) {
5505 /* no more data left in the mbuf chain */
5508 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5509 sizeof(struct sctp_chunkhdr), chunk_buf);
5516 if ((asconf_cnt > 0) && (stcb != NULL)) {
5517 sctp_send_asconf_ack(stcb);
5524 * common input chunk processing (v4 and v6)
5527 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5528 struct sockaddr *src, struct sockaddr *dst,
5529 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5530 uint8_t compute_crc,
5532 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5533 uint32_t vrf_id, uint16_t port)
5536 int fwd_tsn_seen = 0, data_processed = 0;
5537 struct mbuf *m = *mm, *op_err;
5538 char msg[SCTP_DIAG_INFO_LEN];
5540 int cnt_ctrl_ready = 0;
5541 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5542 struct sctp_tcb *stcb = NULL;
5543 struct sctp_nets *net = NULL;
5545 SCTP_STAT_INCR(sctps_recvdatagrams);
5546 #ifdef SCTP_AUDITING_ENABLED
5547 sctp_audit_log(0xE0, 1);
5548 sctp_auditing(0, inp, stcb, net);
5550 if (compute_crc != 0) {
5551 uint32_t check, calc_check;
5553 check = sh->checksum;
5555 calc_check = sctp_calculate_cksum(m, iphlen);
5556 sh->checksum = check;
5557 if (calc_check != check) {
5558 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5559 calc_check, check, (void *)m, length, iphlen);
5560 stcb = sctp_findassociation_addr(m, offset, src, dst,
5561 sh, ch, &inp, &net, vrf_id);
5562 #if defined(INET) || defined(INET6)
5563 if ((ch->chunk_type != SCTP_INITIATION) &&
5564 (net != NULL) && (net->port != port)) {
5565 if (net->port == 0) {
5566 /* UDP encapsulation turned on. */
5567 net->mtu -= sizeof(struct udphdr);
5568 if (stcb->asoc.smallest_mtu > net->mtu) {
5569 sctp_pathmtu_adjustment(stcb, net->mtu);
5571 } else if (port == 0) {
5572 /* UDP encapsulation turned off. */
5573 net->mtu += sizeof(struct udphdr);
5574 /* XXX Update smallest_mtu */
5580 net->flowtype = mflowtype;
5581 net->flowid = mflowid;
5583 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5584 if ((inp != NULL) && (stcb != NULL)) {
5585 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5586 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5587 } else if ((inp != NULL) && (stcb == NULL)) {
5590 SCTP_STAT_INCR(sctps_badsum);
5591 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5595 /* Destination port of 0 is illegal, based on RFC4960. */
5596 if (sh->dest_port == 0) {
5597 SCTP_STAT_INCR(sctps_hdrops);
5600 stcb = sctp_findassociation_addr(m, offset, src, dst,
5601 sh, ch, &inp, &net, vrf_id);
5602 #if defined(INET) || defined(INET6)
5603 if ((ch->chunk_type != SCTP_INITIATION) &&
5604 (net != NULL) && (net->port != port)) {
5605 if (net->port == 0) {
5606 /* UDP encapsulation turned on. */
5607 net->mtu -= sizeof(struct udphdr);
5608 if (stcb->asoc.smallest_mtu > net->mtu) {
5609 sctp_pathmtu_adjustment(stcb, net->mtu);
5611 } else if (port == 0) {
5612 /* UDP encapsulation turned off. */
5613 net->mtu += sizeof(struct udphdr);
5614 /* XXX Update smallest_mtu */
5620 net->flowtype = mflowtype;
5621 net->flowid = mflowid;
5624 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5625 SCTP_STAT_INCR(sctps_noport);
5626 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5629 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5630 sctp_send_shutdown_complete2(src, dst, sh,
5631 mflowtype, mflowid, fibnum,
5635 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5638 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5639 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5640 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5641 (ch->chunk_type != SCTP_INIT))) {
5642 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5644 sctp_send_abort(m, iphlen, src, dst,
5646 mflowtype, mflowid, fibnum,
5651 } else if (stcb == NULL) {
5654 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5655 (void *)m, iphlen, offset, length, (void *)stcb);
5657 /* always clear this before beginning a packet */
5658 stcb->asoc.authenticated = 0;
5659 stcb->asoc.seen_a_sack_this_pkt = 0;
5660 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5661 (void *)stcb, stcb->asoc.state);
5663 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5664 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5666 * If we hit here, we had a ref count
5667 * up when the assoc was aborted and the
5668 * timer is clearing out the assoc, we should
5669 * NOT respond to any packet.. its OOTB.
5671 SCTP_TCB_UNLOCK(stcb);
5673 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5674 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5675 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5677 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5678 mflowtype, mflowid, inp->fibnum,
5683 if (IS_SCTP_CONTROL(ch)) {
5684 /* process the control portion of the SCTP packet */
5685 /* sa_ignore NO_NULL_CHK */
5686 stcb = sctp_process_control(m, iphlen, &offset, length,
5688 inp, stcb, &net, &fwd_tsn_seen,
5689 mflowtype, mflowid, fibnum,
5693 * This covers us if the cookie-echo was there and
5694 * it changes our INP.
5696 inp = stcb->sctp_ep;
5697 #if defined(INET) || defined(INET6)
5698 if ((ch->chunk_type != SCTP_INITIATION) &&
5699 (net != NULL) && (net->port != port)) {
5700 if (net->port == 0) {
5701 /* UDP encapsulation turned on. */
5702 net->mtu -= sizeof(struct udphdr);
5703 if (stcb->asoc.smallest_mtu > net->mtu) {
5704 sctp_pathmtu_adjustment(stcb, net->mtu);
5706 } else if (port == 0) {
5707 /* UDP encapsulation turned off. */
5708 net->mtu += sizeof(struct udphdr);
5709 /* XXX Update smallest_mtu */
5717 * no control chunks, so pre-process DATA chunks (these
5718 * checks are taken care of by control processing)
5722 * if DATA only packet, and auth is required, then punt...
5723 * can't have authenticated without any AUTH (control)
5726 if ((stcb != NULL) &&
5727 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5728 /* "silently" ignore */
5729 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5730 SCTP_STAT_INCR(sctps_recvauthmissing);
5734 /* out of the blue DATA chunk */
5735 SCTP_PROBE5(receive, NULL, NULL, m, NULL, sh);
5736 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5737 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5739 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5740 mflowtype, mflowid, fibnum,
5744 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5745 /* v_tag mismatch! */
5746 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5747 SCTP_STAT_INCR(sctps_badvtag);
5752 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5755 * no valid TCB for this packet, or we found it's a bad
5756 * packet while processing control, or we're done with this
5757 * packet (done or skip rest of data), so we drop it...
5763 * DATA chunk processing
5765 /* plow through the data chunks while length > offset */
5768 * Rest should be DATA only. Check authentication state if AUTH for
5771 if ((length > offset) &&
5773 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5774 !stcb->asoc.authenticated) {
5775 /* "silently" ignore */
5776 SCTP_STAT_INCR(sctps_recvauthmissing);
5777 SCTPDBG(SCTP_DEBUG_AUTH1,
5778 "Data chunk requires AUTH, skipped\n");
5781 if (length > offset) {
5785 * First check to make sure our state is correct. We would
5786 * not get here unless we really did have a tag, so we don't
5787 * abort if this happens, just dump the chunk silently.
5789 switch (SCTP_GET_STATE(stcb)) {
5790 case SCTP_STATE_COOKIE_ECHOED:
5792 * we consider data with valid tags in this state
5793 * shows us the cookie-ack was lost. Imply it was
5796 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5798 case SCTP_STATE_COOKIE_WAIT:
5800 * We consider OOTB any data sent during asoc setup.
5802 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5803 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5805 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5806 mflowtype, mflowid, inp->fibnum,
5809 /* sa_ignore NOTREACHED */
5811 case SCTP_STATE_EMPTY: /* should not happen */
5812 case SCTP_STATE_INUSE: /* should not happen */
5813 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5814 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5817 /* sa_ignore NOTREACHED */
5819 case SCTP_STATE_OPEN:
5820 case SCTP_STATE_SHUTDOWN_SENT:
5823 /* plow through the data chunks while length > offset */
5824 retval = sctp_process_data(mm, iphlen, &offset, length,
5825 inp, stcb, net, &high_tsn);
5828 * The association aborted, NO UNLOCK needed since
5829 * the association is destroyed.
5836 * Anything important needs to have been m_copy'ed in
5841 /* take care of ecn */
5842 if ((data_processed == 1) &&
5843 (stcb->asoc.ecn_supported == 1) &&
5844 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5845 /* Yep, we need to add a ECNE */
5846 sctp_send_ecn_echo(stcb, net, high_tsn);
5849 if ((data_processed == 0) && (fwd_tsn_seen)) {
5851 uint32_t highest_tsn;
5853 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5854 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5856 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5858 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5859 stcb->asoc.send_sack = 1;
5860 sctp_sack_check(stcb, was_a_gap);
5861 } else if (fwd_tsn_seen) {
5862 stcb->asoc.send_sack = 1;
5864 /* trigger send of any chunks in queue... */
5866 #ifdef SCTP_AUDITING_ENABLED
5867 sctp_audit_log(0xE0, 2);
5868 sctp_auditing(1, inp, stcb, net);
5870 SCTPDBG(SCTP_DEBUG_INPUT1,
5871 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5872 stcb->asoc.peers_rwnd,
5873 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5874 stcb->asoc.total_flight);
5875 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5876 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5877 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5879 if (!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue) ||
5881 stcb->asoc.trigger_reset ||
5883 (stcb->asoc.peers_rwnd > 0 ||
5884 (stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) {
5885 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5886 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5887 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5889 #ifdef SCTP_AUDITING_ENABLED
5890 sctp_audit_log(0xE0, 3);
5891 sctp_auditing(2, inp, stcb, net);
5895 SCTP_TCB_UNLOCK(stcb);
5897 if (inp_decr != NULL) {
5898 /* reduce ref-count */
5899 SCTP_INP_WLOCK(inp_decr);
5900 SCTP_INP_DECR_REF(inp_decr);
5901 SCTP_INP_WUNLOCK(inp_decr);
5908 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5912 uint32_t vrf_id = 0;
5914 struct sockaddr_in src, dst;
5917 struct sctp_chunkhdr *ch;
5919 uint8_t compute_crc;
5925 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
5926 SCTP_RELEASE_PKT(i_pak);
5929 m = SCTP_HEADER_TO_CHAIN(i_pak);
5930 #ifdef SCTP_MBUF_LOGGING
5931 /* Log in any input mbufs */
5932 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5933 sctp_log_mbc(m, SCTP_MBUF_INPUT);
5936 #ifdef SCTP_PACKET_LOGGING
5937 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
5941 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
5942 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
5944 if_name(m->m_pkthdr.rcvif),
5945 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
5946 mflowid = m->m_pkthdr.flowid;
5947 mflowtype = M_HASHTYPE_GET(m);
5948 fibnum = M_GETFIB(m);
5949 SCTP_STAT_INCR(sctps_recvpackets);
5950 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
5951 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
5952 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5953 if (SCTP_BUF_LEN(m) < offset) {
5954 if ((m = m_pullup(m, offset)) == NULL) {
5955 SCTP_STAT_INCR(sctps_hdrops);
5959 ip = mtod(m, struct ip *);
5960 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
5961 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
5962 offset -= sizeof(struct sctp_chunkhdr);
5963 memset(&src, 0, sizeof(struct sockaddr_in));
5964 src.sin_family = AF_INET;
5965 src.sin_len = sizeof(struct sockaddr_in);
5966 src.sin_port = sh->src_port;
5967 src.sin_addr = ip->ip_src;
5968 memset(&dst, 0, sizeof(struct sockaddr_in));
5969 dst.sin_family = AF_INET;
5970 dst.sin_len = sizeof(struct sockaddr_in);
5971 dst.sin_port = sh->dest_port;
5972 dst.sin_addr = ip->ip_dst;
5973 length = ntohs(ip->ip_len);
5974 /* Validate mbuf chain length with IP payload length. */
5975 if (SCTP_HEADER_LEN(m) != length) {
5976 SCTPDBG(SCTP_DEBUG_INPUT1,
5977 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
5978 SCTP_STAT_INCR(sctps_hdrops);
5981 /* SCTP does not allow broadcasts or multicasts */
5982 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
5985 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
5988 ecn_bits = ip->ip_tos;
5989 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
5990 SCTP_STAT_INCR(sctps_recvhwcrc);
5993 SCTP_STAT_INCR(sctps_recvswcrc);
5996 sctp_common_input_processing(&m, iphlen, offset, length,
5997 (struct sockaddr *)&src,
5998 (struct sockaddr *)&dst,
6002 mflowtype, mflowid, fibnum,
6011 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6012 extern int *sctp_cpuarry;
6016 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
6023 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6029 uint32_t flowid, tag;
6031 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
6032 flowid = m->m_pkthdr.flowid;
6035 * No flow id built by lower layers fix it so we
6038 offset = off + sizeof(struct sctphdr);
6039 if (SCTP_BUF_LEN(m) < offset) {
6040 if ((m = m_pullup(m, offset)) == NULL) {
6041 SCTP_STAT_INCR(sctps_hdrops);
6042 return (IPPROTO_DONE);
6045 ip = mtod(m, struct ip *);
6046 sh = (struct sctphdr *)((caddr_t)ip + off);
6047 tag = htonl(sh->v_tag);
6048 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
6049 m->m_pkthdr.flowid = flowid;
6050 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE_HASH);
6052 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
6053 sctp_queue_to_mcore(m, off, cpu_to_use);
6054 return (IPPROTO_DONE);
6057 sctp_input_with_port(m, off, 0);
6058 return (IPPROTO_DONE);