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 #if defined(INET) || defined(INET6)
53 #include <netinet/udp.h>
55 #include <netinet/in_kdtrace.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 len = (uint16_t)(sizeof(struct sctp_error_missing_param) + sizeof(uint16_t));
469 /* We abort with an error of missing mandatory param */
470 op_err = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
471 if (op_err != NULL) {
472 struct sctp_error_missing_param *cause;
474 SCTP_BUF_LEN(op_err) = len;
475 cause = mtod(op_err, struct sctp_error_missing_param *);
476 /* Subtract the reserved param */
477 cause->cause.code = htons(SCTP_CAUSE_MISSING_PARAM);
478 cause->cause.length = htons(len);
479 cause->num_missing_params = htonl(1);
480 cause->type[0] = htons(SCTP_STATE_COOKIE);
482 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
483 src, dst, sh, op_err,
486 *abort_no_unlock = 1;
490 asoc->peer_supports_nat = (uint8_t)nat_friendly;
491 /* process the peer's parameters in the INIT-ACK */
492 retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb);
496 initack_limit = offset + ntohs(cp->ch.chunk_length);
497 /* load all addresses */
498 if ((retval = sctp_load_addresses_from_init(stcb, m,
499 (offset + sizeof(struct sctp_init_chunk)), initack_limit,
500 src, dst, NULL, stcb->asoc.port))) {
501 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
502 "Problem with address parameters");
503 SCTPDBG(SCTP_DEBUG_INPUT1,
504 "Load addresses from INIT causes an abort %d\n",
506 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
507 src, dst, sh, op_err,
510 *abort_no_unlock = 1;
513 /* if the peer doesn't support asconf, flush the asconf queue */
514 if (asoc->asconf_supported == 0) {
515 struct sctp_asconf_addr *param, *nparam;
517 TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
518 TAILQ_REMOVE(&asoc->asconf_queue, param, next);
519 SCTP_FREE(param, SCTP_M_ASC_ADDR);
523 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
524 stcb->asoc.local_hmacs);
526 sctp_queue_op_err(stcb, op_err);
527 /* queuing will steal away the mbuf chain to the out queue */
530 /* extract the cookie and queue it to "echo" it back... */
531 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
532 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
533 stcb->asoc.overall_error_count,
535 SCTP_FROM_SCTP_INPUT,
538 stcb->asoc.overall_error_count = 0;
539 net->error_count = 0;
542 * Cancel the INIT timer, We do this first before queueing the
543 * cookie. We always cancel at the primary to assue that we are
544 * canceling the timer started by the INIT which always goes to the
547 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
548 asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
550 /* calculate the RTO */
551 net->RTO = sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
552 SCTP_RTT_FROM_NON_DATA);
553 retval = sctp_send_cookie_echo(m, offset, initack_limit, stcb, net);
558 sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp,
559 struct sctp_tcb *stcb, struct sctp_nets *net)
561 union sctp_sockstore store;
562 struct sctp_nets *r_net, *f_net;
565 uint16_t old_error_counter;
567 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) {
572 memset(&store, 0, sizeof(store));
573 switch (cp->heartbeat.hb_info.addr_family) {
576 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
577 store.sin.sin_family = cp->heartbeat.hb_info.addr_family;
578 store.sin.sin_len = cp->heartbeat.hb_info.addr_len;
579 store.sin.sin_port = stcb->rport;
580 memcpy(&store.sin.sin_addr, cp->heartbeat.hb_info.address,
581 sizeof(store.sin.sin_addr));
589 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
590 store.sin6.sin6_family = cp->heartbeat.hb_info.addr_family;
591 store.sin6.sin6_len = cp->heartbeat.hb_info.addr_len;
592 store.sin6.sin6_port = stcb->rport;
593 memcpy(&store.sin6.sin6_addr, cp->heartbeat.hb_info.address, sizeof(struct in6_addr));
602 r_net = sctp_findnet(stcb, &store.sa);
604 SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
607 if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
608 (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
609 (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
611 * If the its a HB and it's random value is correct when can
612 * confirm the destination.
614 r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
615 if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
616 stcb->asoc.primary_destination = r_net;
617 r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
618 f_net = TAILQ_FIRST(&stcb->asoc.nets);
619 if (f_net != r_net) {
621 * first one on the list is NOT the primary
622 * sctp_cmpaddr() is much more efficient if
623 * the primary is the first on the list,
626 TAILQ_REMOVE(&stcb->asoc.nets, r_net, sctp_next);
627 TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
631 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
632 stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
633 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
634 r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
635 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
637 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
638 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
639 stcb->asoc.overall_error_count,
641 SCTP_FROM_SCTP_INPUT,
644 stcb->asoc.overall_error_count = 0;
645 old_error_counter = r_net->error_count;
646 r_net->error_count = 0;
647 r_net->hb_responded = 1;
648 tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
649 tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
650 /* Now lets do a RTO with this */
651 r_net->RTO = sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv,
652 SCTP_RTT_FROM_NON_DATA);
653 if (!(r_net->dest_state & SCTP_ADDR_REACHABLE)) {
654 r_net->dest_state |= SCTP_ADDR_REACHABLE;
655 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
656 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
658 if (r_net->dest_state & SCTP_ADDR_PF) {
659 r_net->dest_state &= ~SCTP_ADDR_PF;
660 stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
662 if (old_error_counter > 0) {
663 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
664 stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5);
665 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
667 if (r_net == stcb->asoc.primary_destination) {
668 if (stcb->asoc.alternate) {
669 /* release the alternate, primary is good */
670 sctp_free_remote_addr(stcb->asoc.alternate);
671 stcb->asoc.alternate = NULL;
674 /* Mobility adaptation */
676 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
677 SCTP_MOBILITY_BASE) ||
678 sctp_is_mobility_feature_on(stcb->sctp_ep,
679 SCTP_MOBILITY_FASTHANDOFF)) &&
680 sctp_is_mobility_feature_on(stcb->sctp_ep,
681 SCTP_MOBILITY_PRIM_DELETED)) {
683 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
684 stcb->sctp_ep, stcb, NULL,
685 SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
686 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
687 SCTP_MOBILITY_FASTHANDOFF)) {
688 sctp_assoc_immediate_retrans(stcb,
689 stcb->asoc.primary_destination);
691 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
692 SCTP_MOBILITY_BASE)) {
693 sctp_move_chunks_from_net(stcb,
694 stcb->asoc.deleted_primary);
696 sctp_delete_prim_timer(stcb->sctp_ep, stcb,
697 stcb->asoc.deleted_primary);
703 sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
706 * return 0 means we want you to proceed with the abort non-zero
707 * means no abort processing
709 struct sctpasochead *head;
711 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
712 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
713 atomic_add_int(&stcb->asoc.refcnt, 1);
714 SCTP_TCB_UNLOCK(stcb);
715 SCTP_INP_INFO_WLOCK();
717 atomic_subtract_int(&stcb->asoc.refcnt, 1);
719 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) {
720 /* generate a new vtag and send init */
721 LIST_REMOVE(stcb, sctp_asocs);
722 stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
723 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
725 * put it in the bucket in the vtag hash of assoc's for the
728 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
729 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
730 SCTP_INP_INFO_WUNLOCK();
733 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
735 * treat like a case where the cookie expired i.e.: - dump
736 * current cookie. - generate a new vtag. - resend init.
738 /* generate a new vtag and send init */
739 LIST_REMOVE(stcb, sctp_asocs);
740 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
741 sctp_stop_all_cookie_timers(stcb);
742 sctp_toss_old_cookies(stcb, &stcb->asoc);
743 stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
744 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
746 * put it in the bucket in the vtag hash of assoc's for the
749 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
750 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
751 SCTP_INP_INFO_WUNLOCK();
758 sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
759 struct sctp_nets *net)
762 * return 0 means we want you to proceed with the abort non-zero
763 * means no abort processing
765 if (stcb->asoc.auth_supported == 0) {
766 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
769 sctp_asconf_send_nat_state_update(stcb, net);
774 /* Returns 1 if the stcb was aborted, 0 otherwise */
776 sctp_handle_abort(struct sctp_abort_chunk *abort,
777 struct sctp_tcb *stcb, struct sctp_nets *net)
779 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
785 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
789 len = ntohs(abort->ch.chunk_length);
790 if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_error_cause)) {
792 * Need to check the cause codes for our two magic nat
793 * aborts which don't kill the assoc necessarily.
795 struct sctp_error_cause *cause;
797 cause = (struct sctp_error_cause *)(abort + 1);
798 error = ntohs(cause->code);
799 if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
800 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
801 abort->ch.chunk_flags);
802 if (sctp_handle_nat_colliding_state(stcb)) {
805 } else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
806 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
807 abort->ch.chunk_flags);
808 if (sctp_handle_nat_missing_state(stcb, net)) {
815 /* stop any receive timers */
816 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, net,
817 SCTP_FROM_SCTP_INPUT + SCTP_LOC_7);
818 /* notify user of the abort and clean up... */
819 sctp_abort_notification(stcb, 1, error, abort, SCTP_SO_NOT_LOCKED);
821 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
822 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
823 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
824 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
826 #ifdef SCTP_ASOCLOG_OF_TSNS
827 sctp_print_out_track_log(stcb);
829 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
830 so = SCTP_INP_SO(stcb->sctp_ep);
831 atomic_add_int(&stcb->asoc.refcnt, 1);
832 SCTP_TCB_UNLOCK(stcb);
833 SCTP_SOCKET_LOCK(so, 1);
835 atomic_subtract_int(&stcb->asoc.refcnt, 1);
837 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_WAS_ABORTED);
838 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
839 SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
840 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
841 SCTP_SOCKET_UNLOCK(so, 1);
843 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
848 sctp_start_net_timers(struct sctp_tcb *stcb)
850 uint32_t cnt_hb_sent;
851 struct sctp_nets *net;
854 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
856 * For each network start: 1) A pmtu timer. 2) A HB timer 3)
857 * If the dest in unconfirmed send a hb as well if under
858 * max_hb_burst have been sent.
860 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
861 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
862 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
863 (cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
864 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
869 sctp_chunk_output(stcb->sctp_ep, stcb,
870 SCTP_OUTPUT_FROM_COOKIE_ACK,
877 sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
878 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
880 struct sctp_association *asoc;
881 int some_on_streamwheel;
883 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
887 SCTPDBG(SCTP_DEBUG_INPUT2,
888 "sctp_handle_shutdown: handling SHUTDOWN\n");
892 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
893 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
896 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
897 /* Shutdown NOT the expected size */
900 old_state = SCTP_GET_STATE(stcb);
901 sctp_update_acked(stcb, cp, abort_flag);
905 if (asoc->control_pdapi) {
907 * With a normal shutdown we assume the end of last record.
909 SCTP_INP_READ_LOCK(stcb->sctp_ep);
910 if (asoc->control_pdapi->on_strm_q) {
911 struct sctp_stream_in *strm;
913 strm = &asoc->strmin[asoc->control_pdapi->sinfo_stream];
914 if (asoc->control_pdapi->on_strm_q == SCTP_ON_UNORDERED) {
916 TAILQ_REMOVE(&strm->uno_inqueue, asoc->control_pdapi, next_instrm);
917 asoc->control_pdapi->on_strm_q = 0;
918 } else if (asoc->control_pdapi->on_strm_q == SCTP_ON_ORDERED) {
920 TAILQ_REMOVE(&strm->inqueue, asoc->control_pdapi, next_instrm);
921 asoc->control_pdapi->on_strm_q = 0;
924 panic("Unknown state on ctrl:%p on_strm_q:%d",
926 asoc->control_pdapi->on_strm_q);
930 asoc->control_pdapi->end_added = 1;
931 asoc->control_pdapi->pdapi_aborted = 1;
932 asoc->control_pdapi = NULL;
933 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
934 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
935 so = SCTP_INP_SO(stcb->sctp_ep);
936 atomic_add_int(&stcb->asoc.refcnt, 1);
937 SCTP_TCB_UNLOCK(stcb);
938 SCTP_SOCKET_LOCK(so, 1);
940 atomic_subtract_int(&stcb->asoc.refcnt, 1);
941 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
942 /* assoc was freed while we were unlocked */
943 SCTP_SOCKET_UNLOCK(so, 1);
947 if (stcb->sctp_socket) {
948 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
950 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
951 SCTP_SOCKET_UNLOCK(so, 1);
954 /* goto SHUTDOWN_RECEIVED state to block new requests */
955 if (stcb->sctp_socket) {
956 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
957 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
958 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
959 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_RECEIVED);
961 * notify upper layer that peer has initiated a
964 sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
967 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
970 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) {
972 * stop the shutdown timer, since we WILL move to
975 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
976 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
978 /* Now is there unsent data on a stream somewhere? */
979 some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
981 if (!TAILQ_EMPTY(&asoc->send_queue) ||
982 !TAILQ_EMPTY(&asoc->sent_queue) ||
983 some_on_streamwheel) {
984 /* By returning we will push more data out */
987 /* no outstanding data to send, so move on... */
988 /* send SHUTDOWN-ACK */
989 /* move to SHUTDOWN-ACK-SENT state */
990 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
991 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
992 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
994 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
995 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_ACK_SENT);
996 sctp_stop_timers_for_shutdown(stcb);
997 sctp_send_shutdown_ack(stcb, net);
998 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK,
999 stcb->sctp_ep, stcb, net);
1000 } else if (old_state == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1001 sctp_send_shutdown_ack(stcb, net);
1007 sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
1008 struct sctp_tcb *stcb,
1009 struct sctp_nets *net)
1011 struct sctp_association *asoc;
1012 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1015 so = SCTP_INP_SO(stcb->sctp_ep);
1017 SCTPDBG(SCTP_DEBUG_INPUT2,
1018 "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
1023 /* process according to association state */
1024 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
1025 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1026 /* unexpected SHUTDOWN-ACK... do OOTB handling... */
1027 sctp_send_shutdown_complete(stcb, net, 1);
1028 SCTP_TCB_UNLOCK(stcb);
1031 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
1032 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
1033 /* unexpected SHUTDOWN-ACK... so ignore... */
1034 SCTP_TCB_UNLOCK(stcb);
1037 if (asoc->control_pdapi) {
1039 * With a normal shutdown we assume the end of last record.
1041 SCTP_INP_READ_LOCK(stcb->sctp_ep);
1042 asoc->control_pdapi->end_added = 1;
1043 asoc->control_pdapi->pdapi_aborted = 1;
1044 asoc->control_pdapi = NULL;
1045 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
1046 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1047 atomic_add_int(&stcb->asoc.refcnt, 1);
1048 SCTP_TCB_UNLOCK(stcb);
1049 SCTP_SOCKET_LOCK(so, 1);
1050 SCTP_TCB_LOCK(stcb);
1051 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1052 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1053 /* assoc was freed while we were unlocked */
1054 SCTP_SOCKET_UNLOCK(so, 1);
1058 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
1059 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1060 SCTP_SOCKET_UNLOCK(so, 1);
1064 if (!TAILQ_EMPTY(&asoc->send_queue) ||
1065 !TAILQ_EMPTY(&asoc->sent_queue) ||
1066 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
1067 panic("Queues are not empty when handling SHUTDOWN-ACK");
1070 /* stop the timer */
1071 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net,
1072 SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
1073 /* send SHUTDOWN-COMPLETE */
1074 sctp_send_shutdown_complete(stcb, net, 0);
1075 /* notify upper layer protocol */
1076 if (stcb->sctp_socket) {
1077 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1078 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1079 stcb->sctp_socket->so_snd.sb_cc = 0;
1081 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
1083 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
1084 /* free the TCB but first save off the ep */
1085 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1086 atomic_add_int(&stcb->asoc.refcnt, 1);
1087 SCTP_TCB_UNLOCK(stcb);
1088 SCTP_SOCKET_LOCK(so, 1);
1089 SCTP_TCB_LOCK(stcb);
1090 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1092 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1093 SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
1094 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1095 SCTP_SOCKET_UNLOCK(so, 1);
1100 sctp_process_unrecog_chunk(struct sctp_tcb *stcb, uint8_t chunk_type,
1101 struct sctp_nets *net)
1103 switch (chunk_type) {
1104 case SCTP_ASCONF_ACK:
1106 sctp_asconf_cleanup(stcb, net);
1108 case SCTP_IFORWARD_CUM_TSN:
1109 case SCTP_FORWARD_CUM_TSN:
1110 stcb->asoc.prsctp_supported = 0;
1113 SCTPDBG(SCTP_DEBUG_INPUT2,
1114 "Peer does not support chunk type %d (0x%x).\n",
1115 chunk_type, chunk_type);
1121 * Skip past the param header and then we will find the param that caused the
1122 * problem. There are a number of param's in a ASCONF OR the prsctp param
1123 * these will turn of specific features.
1124 * XXX: Is this the right thing to do?
1127 sctp_process_unrecog_param(struct sctp_tcb *stcb, uint16_t parameter_type)
1129 switch (parameter_type) {
1131 case SCTP_PRSCTP_SUPPORTED:
1132 stcb->asoc.prsctp_supported = 0;
1134 case SCTP_SUPPORTED_CHUNK_EXT:
1136 /* draft-ietf-tsvwg-addip-sctp */
1137 case SCTP_HAS_NAT_SUPPORT:
1138 stcb->asoc.peer_supports_nat = 0;
1140 case SCTP_ADD_IP_ADDRESS:
1141 case SCTP_DEL_IP_ADDRESS:
1142 case SCTP_SET_PRIM_ADDR:
1143 stcb->asoc.asconf_supported = 0;
1145 case SCTP_SUCCESS_REPORT:
1146 case SCTP_ERROR_CAUSE_IND:
1147 SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
1148 SCTPDBG(SCTP_DEBUG_INPUT2,
1149 "Turning off ASCONF to this strange peer\n");
1150 stcb->asoc.asconf_supported = 0;
1153 SCTPDBG(SCTP_DEBUG_INPUT2,
1154 "Peer does not support param type %d (0x%x)??\n",
1155 parameter_type, parameter_type);
1161 sctp_handle_error(struct sctp_chunkhdr *ch,
1162 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
1164 struct sctp_error_cause *cause;
1165 struct sctp_association *asoc;
1166 uint32_t remaining_length, adjust;
1167 uint16_t code, cause_code, cause_length;
1168 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1172 /* parse through all of the errors and process */
1174 cause = (struct sctp_error_cause *)((caddr_t)ch +
1175 sizeof(struct sctp_chunkhdr));
1176 remaining_length = ntohs(ch->chunk_length);
1177 if (remaining_length > limit) {
1178 remaining_length = limit;
1180 if (remaining_length >= sizeof(struct sctp_chunkhdr)) {
1181 remaining_length -= sizeof(struct sctp_chunkhdr);
1183 remaining_length = 0;
1186 while (remaining_length >= sizeof(struct sctp_error_cause)) {
1187 /* Process an Error Cause */
1188 cause_code = ntohs(cause->code);
1189 cause_length = ntohs(cause->length);
1190 if ((cause_length > remaining_length) || (cause_length == 0)) {
1191 /* Invalid cause length, possibly due to truncation. */
1192 SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in cause - bytes left: %u cause length: %u\n",
1193 remaining_length, cause_length);
1197 /* report the first error cause */
1200 switch (cause_code) {
1201 case SCTP_CAUSE_INVALID_STREAM:
1202 case SCTP_CAUSE_MISSING_PARAM:
1203 case SCTP_CAUSE_INVALID_PARAM:
1204 case SCTP_CAUSE_NO_USER_DATA:
1205 SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %u back? We have a bug :/ (or do they?)\n",
1208 case SCTP_CAUSE_NAT_COLLIDING_STATE:
1209 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags: %x\n",
1211 if (sctp_handle_nat_colliding_state(stcb)) {
1215 case SCTP_CAUSE_NAT_MISSING_STATE:
1216 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags: %x\n",
1218 if (sctp_handle_nat_missing_state(stcb, net)) {
1222 case SCTP_CAUSE_STALE_COOKIE:
1224 * We only act if we have echoed a cookie and are
1227 if ((cause_length >= sizeof(struct sctp_error_stale_cookie)) &&
1228 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1229 struct sctp_error_stale_cookie *stale_cookie;
1231 stale_cookie = (struct sctp_error_stale_cookie *)cause;
1232 asoc->cookie_preserve_req = ntohl(stale_cookie->stale_time);
1233 /* Double it to be more robust on RTX */
1234 if (asoc->cookie_preserve_req <= UINT32_MAX / 2) {
1235 asoc->cookie_preserve_req *= 2;
1237 asoc->cookie_preserve_req = UINT32_MAX;
1239 asoc->stale_cookie_count++;
1240 if (asoc->stale_cookie_count >
1241 asoc->max_init_times) {
1242 sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
1243 /* now free the asoc */
1244 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1245 so = SCTP_INP_SO(stcb->sctp_ep);
1246 atomic_add_int(&stcb->asoc.refcnt, 1);
1247 SCTP_TCB_UNLOCK(stcb);
1248 SCTP_SOCKET_LOCK(so, 1);
1249 SCTP_TCB_LOCK(stcb);
1250 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1252 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1253 SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
1254 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1255 SCTP_SOCKET_UNLOCK(so, 1);
1259 /* blast back to INIT state */
1260 sctp_toss_old_cookies(stcb, &stcb->asoc);
1261 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
1262 sctp_stop_all_cookie_timers(stcb);
1263 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
1266 case SCTP_CAUSE_UNRESOLVABLE_ADDR:
1268 * Nothing we can do here, we don't do hostname
1269 * addresses so if the peer does not like my IPv6
1270 * (or IPv4 for that matter) it does not matter. If
1271 * they don't support that type of address, they can
1272 * NOT possibly get that packet type... i.e. with no
1273 * IPv6 you can't receive a IPv6 packet. so we can
1274 * safely ignore this one. If we ever added support
1275 * for HOSTNAME Addresses, then we would need to do
1279 case SCTP_CAUSE_UNRECOG_CHUNK:
1280 if (cause_length >= sizeof(struct sctp_error_unrecognized_chunk)) {
1281 struct sctp_error_unrecognized_chunk *unrec_chunk;
1283 unrec_chunk = (struct sctp_error_unrecognized_chunk *)cause;
1284 sctp_process_unrecog_chunk(stcb, unrec_chunk->ch.chunk_type, net);
1287 case SCTP_CAUSE_UNRECOG_PARAM:
1288 /* XXX: We only consider the first parameter */
1289 if (cause_length >= sizeof(struct sctp_error_cause) + sizeof(struct sctp_paramhdr)) {
1290 struct sctp_paramhdr *unrec_parameter;
1292 unrec_parameter = (struct sctp_paramhdr *)(cause + 1);
1293 sctp_process_unrecog_param(stcb, ntohs(unrec_parameter->param_type));
1296 case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
1298 * We ignore this since the timer will drive out a
1299 * new cookie anyway and there timer will drive us
1300 * to send a SHUTDOWN_COMPLETE. We can't send one
1301 * here since we don't have their tag.
1304 case SCTP_CAUSE_DELETING_LAST_ADDR:
1305 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1306 case SCTP_CAUSE_DELETING_SRC_ADDR:
1308 * We should NOT get these here, but in a
1311 SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a error cause with code %u.\n",
1314 case SCTP_CAUSE_OUT_OF_RESC:
1316 * And what, pray tell do we do with the fact that
1317 * the peer is out of resources? Not really sure we
1318 * could do anything but abort. I suspect this
1319 * should have came WITH an abort instead of in a
1324 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown code 0x%x\n",
1328 adjust = SCTP_SIZE32(cause_length);
1329 if (remaining_length >= adjust) {
1330 remaining_length -= adjust;
1332 remaining_length = 0;
1334 cause = (struct sctp_error_cause *)((caddr_t)cause + adjust);
1336 sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, code, ch, SCTP_SO_NOT_LOCKED);
1341 sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
1342 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
1343 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
1344 struct sctp_nets *net, int *abort_no_unlock,
1345 uint8_t mflowtype, uint32_t mflowid,
1348 struct sctp_init_ack *init_ack;
1349 struct mbuf *op_err;
1351 SCTPDBG(SCTP_DEBUG_INPUT2,
1352 "sctp_handle_init_ack: handling INIT-ACK\n");
1355 SCTPDBG(SCTP_DEBUG_INPUT2,
1356 "sctp_handle_init_ack: TCB is null\n");
1359 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) {
1360 /* Invalid length */
1361 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1362 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1363 src, dst, sh, op_err,
1366 *abort_no_unlock = 1;
1369 init_ack = &cp->init;
1370 /* validate parameters */
1371 if (init_ack->initiate_tag == 0) {
1372 /* protocol error... send an abort */
1373 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1374 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1375 src, dst, sh, op_err,
1378 *abort_no_unlock = 1;
1381 if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) {
1382 /* protocol error... send an abort */
1383 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1384 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1385 src, dst, sh, op_err,
1388 *abort_no_unlock = 1;
1391 if (init_ack->num_inbound_streams == 0) {
1392 /* protocol error... send an abort */
1393 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1394 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1395 src, dst, sh, op_err,
1398 *abort_no_unlock = 1;
1401 if (init_ack->num_outbound_streams == 0) {
1402 /* protocol error... send an abort */
1403 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1404 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1405 src, dst, sh, op_err,
1408 *abort_no_unlock = 1;
1411 /* process according to association state... */
1412 switch (SCTP_GET_STATE(stcb)) {
1413 case SCTP_STATE_COOKIE_WAIT:
1414 /* this is the expected state for this chunk */
1415 /* process the INIT-ACK parameters */
1416 if (stcb->asoc.primary_destination->dest_state &
1417 SCTP_ADDR_UNCONFIRMED) {
1419 * The primary is where we sent the INIT, we can
1420 * always consider it confirmed when the INIT-ACK is
1421 * returned. Do this before we load addresses
1424 stcb->asoc.primary_destination->dest_state &=
1425 ~SCTP_ADDR_UNCONFIRMED;
1426 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
1427 stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
1429 if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
1430 net, abort_no_unlock,
1433 /* error in parsing parameters */
1436 /* update our state */
1437 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
1438 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_ECHOED);
1440 /* reset the RTO calc */
1441 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1442 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1443 stcb->asoc.overall_error_count,
1445 SCTP_FROM_SCTP_INPUT,
1448 stcb->asoc.overall_error_count = 0;
1449 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
1451 * collapse the init timer back in case of a exponential
1454 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
1457 * the send at the end of the inbound data processing will
1458 * cause the cookie to be sent
1461 case SCTP_STATE_SHUTDOWN_SENT:
1462 /* incorrect state... discard */
1464 case SCTP_STATE_COOKIE_ECHOED:
1465 /* incorrect state... discard */
1467 case SCTP_STATE_OPEN:
1468 /* incorrect state... discard */
1470 case SCTP_STATE_EMPTY:
1471 case SCTP_STATE_INUSE:
1473 /* incorrect state... discard */
1477 SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
1481 static struct sctp_tcb *
1482 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1483 struct sockaddr *src, struct sockaddr *dst,
1484 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1485 struct sctp_inpcb *inp, struct sctp_nets **netp,
1486 struct sockaddr *init_src, int *notification,
1487 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1488 uint8_t mflowtype, uint32_t mflowid,
1489 uint32_t vrf_id, uint16_t port);
1493 * handle a state cookie for an existing association m: input packet mbuf
1494 * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
1495 * "split" mbuf and the cookie signature does not exist offset: offset into
1496 * mbuf to the cookie-echo chunk
1498 static struct sctp_tcb *
1499 sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
1500 struct sockaddr *src, struct sockaddr *dst,
1501 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1502 struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
1503 struct sockaddr *init_src, int *notification,
1504 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1505 uint8_t mflowtype, uint32_t mflowid,
1506 uint32_t vrf_id, uint16_t port)
1508 struct sctp_association *asoc;
1509 struct sctp_init_chunk *init_cp, init_buf;
1510 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1511 struct sctp_nets *net;
1512 struct mbuf *op_err;
1514 int init_offset, initack_offset, i;
1518 #if defined(SCTP_DETAILED_STR_STATS)
1523 /* I know that the TCB is non-NULL from the caller */
1525 for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
1526 if (asoc->cookie_how[how_indx] == 0)
1529 if (how_indx < sizeof(asoc->cookie_how)) {
1530 asoc->cookie_how[how_indx] = 1;
1532 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1533 /* SHUTDOWN came in after sending INIT-ACK */
1534 sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
1535 op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
1536 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
1537 mflowtype, mflowid, inp->fibnum,
1539 if (how_indx < sizeof(asoc->cookie_how))
1540 asoc->cookie_how[how_indx] = 2;
1544 * find and validate the INIT chunk in the cookie (peer's info) the
1545 * INIT should start after the cookie-echo header struct (chunk
1546 * header, state cookie header struct)
1548 init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
1550 init_cp = (struct sctp_init_chunk *)
1551 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1552 (uint8_t *)&init_buf);
1553 if (init_cp == NULL) {
1554 /* could not pull a INIT chunk in cookie */
1557 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1561 * find and validate the INIT-ACK chunk in the cookie (my info) the
1562 * INIT-ACK follows the INIT chunk
1564 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1565 initack_cp = (struct sctp_init_ack_chunk *)
1566 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1567 (uint8_t *)&initack_buf);
1568 if (initack_cp == NULL) {
1569 /* could not pull INIT-ACK chunk in cookie */
1572 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1575 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1576 (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
1578 * case D in Section 5.2.4 Table 2: MMAA process accordingly
1579 * to get into the OPEN state
1581 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1583 * Opps, this means that we somehow generated two vtag's
1584 * the same. I.e. we did:
1586 * <---INIT(tag=a)------
1587 * ----INIT-ACK(tag=t)-->
1588 * ----INIT(tag=t)------> *1
1589 * <---INIT-ACK(tag=a)---
1590 * <----CE(tag=t)------------- *2
1592 * At point *1 we should be generating a different
1593 * tag t'. Which means we would throw away the CE and send
1594 * ours instead. Basically this is case C (throw away side).
1596 if (how_indx < sizeof(asoc->cookie_how))
1597 asoc->cookie_how[how_indx] = 17;
1601 switch (SCTP_GET_STATE(stcb)) {
1602 case SCTP_STATE_COOKIE_WAIT:
1603 case SCTP_STATE_COOKIE_ECHOED:
1605 * INIT was sent but got a COOKIE_ECHO with the
1606 * correct tags... just accept it...but we must
1607 * process the init so that we can make sure we have
1608 * the right seq no's.
1610 /* First we must process the INIT !! */
1611 retval = sctp_process_init(init_cp, stcb);
1613 if (how_indx < sizeof(asoc->cookie_how))
1614 asoc->cookie_how[how_indx] = 3;
1617 /* we have already processed the INIT so no problem */
1618 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp,
1620 SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
1621 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp,
1623 SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
1624 /* update current state */
1625 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1626 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1628 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1630 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1631 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1632 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1633 stcb->sctp_ep, stcb, asoc->primary_destination);
1635 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1636 sctp_stop_all_cookie_timers(stcb);
1637 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1638 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1639 (!SCTP_IS_LISTENING(inp))) {
1640 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1644 * Here is where collision would go if we
1645 * did a connect() and instead got a
1646 * init/init-ack/cookie done before the
1647 * init-ack came back..
1649 stcb->sctp_ep->sctp_flags |=
1650 SCTP_PCB_FLAGS_CONNECTED;
1651 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1652 so = SCTP_INP_SO(stcb->sctp_ep);
1653 atomic_add_int(&stcb->asoc.refcnt, 1);
1654 SCTP_TCB_UNLOCK(stcb);
1655 SCTP_SOCKET_LOCK(so, 1);
1656 SCTP_TCB_LOCK(stcb);
1657 atomic_add_int(&stcb->asoc.refcnt, -1);
1658 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1659 SCTP_SOCKET_UNLOCK(so, 1);
1663 soisconnected(stcb->sctp_socket);
1664 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1665 SCTP_SOCKET_UNLOCK(so, 1);
1668 /* notify upper layer */
1669 *notification = SCTP_NOTIFY_ASSOC_UP;
1671 * since we did not send a HB make sure we don't
1674 old.tv_sec = cookie->time_entered.tv_sec;
1675 old.tv_usec = cookie->time_entered.tv_usec;
1676 net->hb_responded = 1;
1677 net->RTO = sctp_calculate_rto(stcb, asoc, net,
1679 SCTP_RTT_FROM_NON_DATA);
1681 if (stcb->asoc.sctp_autoclose_ticks &&
1682 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1683 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1689 * we're in the OPEN state (or beyond), so peer must
1690 * have simply lost the COOKIE-ACK
1694 sctp_stop_all_cookie_timers(stcb);
1696 * We ignore the return code here.. not sure if we should
1697 * somehow abort.. but we do have an existing asoc. This
1698 * really should not fail.
1700 if (sctp_load_addresses_from_init(stcb, m,
1701 init_offset + sizeof(struct sctp_init_chunk),
1702 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1703 if (how_indx < sizeof(asoc->cookie_how))
1704 asoc->cookie_how[how_indx] = 4;
1707 /* respond with a COOKIE-ACK */
1708 sctp_toss_old_cookies(stcb, asoc);
1709 sctp_send_cookie_ack(stcb);
1710 if (how_indx < sizeof(asoc->cookie_how))
1711 asoc->cookie_how[how_indx] = 5;
1715 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1716 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1717 cookie->tie_tag_my_vtag == 0 &&
1718 cookie->tie_tag_peer_vtag == 0) {
1720 * case C in Section 5.2.4 Table 2: XMOO silently discard
1722 if (how_indx < sizeof(asoc->cookie_how))
1723 asoc->cookie_how[how_indx] = 6;
1727 * If nat support, and the below and stcb is established, send back
1728 * a ABORT(colliding state) if we are established.
1730 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) &&
1731 (asoc->peer_supports_nat) &&
1732 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1733 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1734 (asoc->peer_vtag == 0)))) {
1736 * Special case - Peer's support nat. We may have two init's
1737 * that we gave out the same tag on since one was not
1738 * established.. i.e. we get INIT from host-1 behind the nat
1739 * and we respond tag-a, we get a INIT from host-2 behind
1740 * the nat and we get tag-a again. Then we bring up host-1
1741 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1742 * Now we have colliding state. We must send an abort here
1743 * with colliding state indication.
1745 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1746 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1747 mflowtype, mflowid, inp->fibnum,
1751 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1752 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1753 (asoc->peer_vtag == 0))) {
1755 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1756 * should be ok, re-accept peer info
1758 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1760 * Extension of case C. If we hit this, then the
1761 * random number generator returned the same vtag
1762 * when we first sent our INIT-ACK and when we later
1763 * sent our INIT. The side with the seq numbers that
1764 * are different will be the one that normnally
1765 * would have hit case C. This in effect "extends"
1766 * our vtags in this collision case to be 64 bits.
1767 * The same collision could occur aka you get both
1768 * vtag and seq number the same twice in a row.. but
1769 * is much less likely. If it did happen then we
1770 * would proceed through and bring up the assoc.. we
1771 * may end up with the wrong stream setup however..
1772 * which would be bad.. but there is no way to
1773 * tell.. until we send on a stream that does not
1776 if (how_indx < sizeof(asoc->cookie_how))
1777 asoc->cookie_how[how_indx] = 7;
1781 if (how_indx < sizeof(asoc->cookie_how))
1782 asoc->cookie_how[how_indx] = 8;
1783 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1784 SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1785 sctp_stop_all_cookie_timers(stcb);
1787 * since we did not send a HB make sure we don't double
1790 net->hb_responded = 1;
1791 if (stcb->asoc.sctp_autoclose_ticks &&
1792 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1793 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1796 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1797 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
1799 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1801 * Ok the peer probably discarded our data (if we
1802 * echoed a cookie+data). So anything on the
1803 * sent_queue should be marked for retransmit, we
1804 * may not get something to kick us so it COULD
1805 * still take a timeout to move these.. but it can't
1806 * hurt to mark them.
1808 struct sctp_tmit_chunk *chk;
1810 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1811 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1812 chk->sent = SCTP_DATAGRAM_RESEND;
1813 sctp_flight_size_decrease(chk);
1814 sctp_total_flight_decrease(stcb, chk);
1815 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1821 /* process the INIT info (peer's info) */
1822 retval = sctp_process_init(init_cp, stcb);
1824 if (how_indx < sizeof(asoc->cookie_how))
1825 asoc->cookie_how[how_indx] = 9;
1828 if (sctp_load_addresses_from_init(stcb, m,
1829 init_offset + sizeof(struct sctp_init_chunk),
1830 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1831 if (how_indx < sizeof(asoc->cookie_how))
1832 asoc->cookie_how[how_indx] = 10;
1835 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
1836 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1837 *notification = SCTP_NOTIFY_ASSOC_UP;
1839 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1840 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1841 (!SCTP_IS_LISTENING(inp))) {
1842 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1845 stcb->sctp_ep->sctp_flags |=
1846 SCTP_PCB_FLAGS_CONNECTED;
1847 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1848 so = SCTP_INP_SO(stcb->sctp_ep);
1849 atomic_add_int(&stcb->asoc.refcnt, 1);
1850 SCTP_TCB_UNLOCK(stcb);
1851 SCTP_SOCKET_LOCK(so, 1);
1852 SCTP_TCB_LOCK(stcb);
1853 atomic_add_int(&stcb->asoc.refcnt, -1);
1854 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1855 SCTP_SOCKET_UNLOCK(so, 1);
1859 soisconnected(stcb->sctp_socket);
1860 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1861 SCTP_SOCKET_UNLOCK(so, 1);
1864 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1865 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1867 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1868 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1869 } else if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1870 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1872 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1874 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1875 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1876 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1877 stcb->sctp_ep, stcb, asoc->primary_destination);
1879 sctp_stop_all_cookie_timers(stcb);
1880 sctp_toss_old_cookies(stcb, asoc);
1881 sctp_send_cookie_ack(stcb);
1884 * only if we have retrans set do we do this. What
1885 * this call does is get only the COOKIE-ACK out and
1886 * then when we return the normal call to
1887 * sctp_chunk_output will get the retrans out behind
1890 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1892 if (how_indx < sizeof(asoc->cookie_how))
1893 asoc->cookie_how[how_indx] = 11;
1897 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1898 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1899 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1900 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1901 cookie->tie_tag_peer_vtag != 0) {
1902 struct sctpasochead *head;
1903 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1907 if (asoc->peer_supports_nat) {
1909 * This is a gross gross hack. Just call the
1910 * cookie_new code since we are allowing a duplicate
1911 * association. I hope this works...
1913 return (sctp_process_cookie_new(m, iphlen, offset, src, dst,
1914 sh, cookie, cookie_len,
1915 inp, netp, init_src, notification,
1916 auth_skipped, auth_offset, auth_len,
1921 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1924 if (how_indx < sizeof(asoc->cookie_how))
1925 asoc->cookie_how[how_indx] = 12;
1926 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net,
1927 SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
1928 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1929 SCTP_FROM_SCTP_INPUT + SCTP_LOC_17);
1931 /* notify upper layer */
1932 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1933 atomic_add_int(&stcb->asoc.refcnt, 1);
1934 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_OPEN) &&
1935 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1936 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
1937 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1939 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1940 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1941 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1942 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1944 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1945 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1946 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1947 stcb->sctp_ep, stcb, asoc->primary_destination);
1949 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1950 /* move to OPEN state, if not in SHUTDOWN_SENT */
1951 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1953 asoc->pre_open_streams =
1954 ntohs(initack_cp->init.num_outbound_streams);
1955 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1956 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1957 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1959 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1961 asoc->str_reset_seq_in = asoc->init_seq_number;
1963 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1964 if (asoc->mapping_array) {
1965 memset(asoc->mapping_array, 0,
1966 asoc->mapping_array_size);
1968 if (asoc->nr_mapping_array) {
1969 memset(asoc->nr_mapping_array, 0,
1970 asoc->mapping_array_size);
1972 SCTP_TCB_UNLOCK(stcb);
1973 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1974 so = SCTP_INP_SO(stcb->sctp_ep);
1975 SCTP_SOCKET_LOCK(so, 1);
1977 SCTP_INP_INFO_WLOCK();
1978 SCTP_INP_WLOCK(stcb->sctp_ep);
1979 SCTP_TCB_LOCK(stcb);
1980 atomic_add_int(&stcb->asoc.refcnt, -1);
1981 /* send up all the data */
1982 SCTP_TCB_SEND_LOCK(stcb);
1984 sctp_report_all_outbound(stcb, 0, 1, SCTP_SO_LOCKED);
1985 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1986 stcb->asoc.strmout[i].chunks_on_queues = 0;
1987 #if defined(SCTP_DETAILED_STR_STATS)
1988 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1989 asoc->strmout[i].abandoned_sent[j] = 0;
1990 asoc->strmout[i].abandoned_unsent[j] = 0;
1993 asoc->strmout[i].abandoned_sent[0] = 0;
1994 asoc->strmout[i].abandoned_unsent[0] = 0;
1996 stcb->asoc.strmout[i].sid = i;
1997 stcb->asoc.strmout[i].next_mid_ordered = 0;
1998 stcb->asoc.strmout[i].next_mid_unordered = 0;
1999 stcb->asoc.strmout[i].last_msg_incomplete = 0;
2001 /* process the INIT-ACK info (my info) */
2002 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2003 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2005 /* pull from vtag hash */
2006 LIST_REMOVE(stcb, sctp_asocs);
2007 /* re-insert to new vtag position */
2008 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
2009 SCTP_BASE_INFO(hashasocmark))];
2011 * put it in the bucket in the vtag hash of assoc's for the
2014 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
2016 SCTP_TCB_SEND_UNLOCK(stcb);
2017 SCTP_INP_WUNLOCK(stcb->sctp_ep);
2018 SCTP_INP_INFO_WUNLOCK();
2019 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2020 SCTP_SOCKET_UNLOCK(so, 1);
2022 asoc->total_flight = 0;
2023 asoc->total_flight_count = 0;
2024 /* process the INIT info (peer's info) */
2025 retval = sctp_process_init(init_cp, stcb);
2027 if (how_indx < sizeof(asoc->cookie_how))
2028 asoc->cookie_how[how_indx] = 13;
2033 * since we did not send a HB make sure we don't double
2036 net->hb_responded = 1;
2038 if (sctp_load_addresses_from_init(stcb, m,
2039 init_offset + sizeof(struct sctp_init_chunk),
2040 initack_offset, src, dst, init_src, stcb->asoc.port)) {
2041 if (how_indx < sizeof(asoc->cookie_how))
2042 asoc->cookie_how[how_indx] = 14;
2046 /* respond with a COOKIE-ACK */
2047 sctp_stop_all_cookie_timers(stcb);
2048 sctp_toss_old_cookies(stcb, asoc);
2049 sctp_send_cookie_ack(stcb);
2050 if (how_indx < sizeof(asoc->cookie_how))
2051 asoc->cookie_how[how_indx] = 15;
2055 if (how_indx < sizeof(asoc->cookie_how))
2056 asoc->cookie_how[how_indx] = 16;
2057 /* all other cases... */
2063 * handle a state cookie for a new association m: input packet mbuf chain--
2064 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
2065 * and the cookie signature does not exist offset: offset into mbuf to the
2066 * cookie-echo chunk length: length of the cookie chunk to: where the init
2067 * was from returns a new TCB
2069 static struct sctp_tcb *
2070 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
2071 struct sockaddr *src, struct sockaddr *dst,
2072 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
2073 struct sctp_inpcb *inp, struct sctp_nets **netp,
2074 struct sockaddr *init_src, int *notification,
2075 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2076 uint8_t mflowtype, uint32_t mflowid,
2077 uint32_t vrf_id, uint16_t port)
2079 struct sctp_tcb *stcb;
2080 struct sctp_init_chunk *init_cp, init_buf;
2081 struct sctp_init_ack_chunk *initack_cp, initack_buf;
2082 union sctp_sockstore store;
2083 struct sctp_association *asoc;
2084 int init_offset, initack_offset, initack_limit;
2087 uint8_t auth_chunk_buf[SCTP_PARAM_BUFFER_SIZE];
2088 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2091 so = SCTP_INP_SO(inp);
2095 * find and validate the INIT chunk in the cookie (peer's info) the
2096 * INIT should start after the cookie-echo header struct (chunk
2097 * header, state cookie header struct)
2099 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
2100 init_cp = (struct sctp_init_chunk *)
2101 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
2102 (uint8_t *)&init_buf);
2103 if (init_cp == NULL) {
2104 /* could not pull a INIT chunk in cookie */
2105 SCTPDBG(SCTP_DEBUG_INPUT1,
2106 "process_cookie_new: could not pull INIT chunk hdr\n");
2109 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
2110 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
2113 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
2115 * find and validate the INIT-ACK chunk in the cookie (my info) the
2116 * INIT-ACK follows the INIT chunk
2118 initack_cp = (struct sctp_init_ack_chunk *)
2119 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
2120 (uint8_t *)&initack_buf);
2121 if (initack_cp == NULL) {
2122 /* could not pull INIT-ACK chunk in cookie */
2123 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
2126 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
2130 * NOTE: We can't use the INIT_ACK's chk_length to determine the
2131 * "initack_limit" value. This is because the chk_length field
2132 * includes the length of the cookie, but the cookie is omitted when
2133 * the INIT and INIT_ACK are tacked onto the cookie...
2135 initack_limit = offset + cookie_len;
2138 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2143 * Here we do a trick, we set in NULL for the proc/thread argument.
2144 * We do this since in effect we only use the p argument when the
2145 * socket is unbound and we must do an implicit bind. Since we are
2146 * getting a cookie, we cannot be unbound.
2148 stcb = sctp_aloc_assoc(inp, init_src, &error,
2149 ntohl(initack_cp->init.initiate_tag), vrf_id,
2150 ntohs(initack_cp->init.num_outbound_streams),
2152 (struct thread *)NULL,
2153 SCTP_DONT_INITIALIZE_AUTH_PARAMS);
2155 struct mbuf *op_err;
2157 /* memory problem? */
2158 SCTPDBG(SCTP_DEBUG_INPUT1,
2159 "process_cookie_new: no room for another TCB!\n");
2160 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2161 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2162 src, dst, sh, op_err,
2167 /* get the correct sctp_nets */
2169 *netp = sctp_findnet(stcb, init_src);
2172 /* get scope variables out of cookie */
2173 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2174 asoc->scope.site_scope = cookie->site_scope;
2175 asoc->scope.local_scope = cookie->local_scope;
2176 asoc->scope.loopback_scope = cookie->loopback_scope;
2178 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2179 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2180 struct mbuf *op_err;
2183 * Houston we have a problem. The EP changed while the
2184 * cookie was in flight. Only recourse is to abort the
2187 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2188 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2189 src, dst, sh, op_err,
2192 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2193 atomic_add_int(&stcb->asoc.refcnt, 1);
2194 SCTP_TCB_UNLOCK(stcb);
2195 SCTP_SOCKET_LOCK(so, 1);
2196 SCTP_TCB_LOCK(stcb);
2197 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2199 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2200 SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2201 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2202 SCTP_SOCKET_UNLOCK(so, 1);
2206 /* process the INIT-ACK info (my info) */
2207 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2208 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2209 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
2210 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
2211 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
2212 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
2213 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
2214 asoc->str_reset_seq_in = asoc->init_seq_number;
2216 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
2218 /* process the INIT info (peer's info) */
2220 retval = sctp_process_init(init_cp, stcb);
2224 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2225 atomic_add_int(&stcb->asoc.refcnt, 1);
2226 SCTP_TCB_UNLOCK(stcb);
2227 SCTP_SOCKET_LOCK(so, 1);
2228 SCTP_TCB_LOCK(stcb);
2229 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2231 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2232 SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2233 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2234 SCTP_SOCKET_UNLOCK(so, 1);
2238 /* load all addresses */
2239 if (sctp_load_addresses_from_init(stcb, m,
2240 init_offset + sizeof(struct sctp_init_chunk), initack_offset,
2241 src, dst, init_src, port)) {
2242 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2243 atomic_add_int(&stcb->asoc.refcnt, 1);
2244 SCTP_TCB_UNLOCK(stcb);
2245 SCTP_SOCKET_LOCK(so, 1);
2246 SCTP_TCB_LOCK(stcb);
2247 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2249 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2250 SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2251 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2252 SCTP_SOCKET_UNLOCK(so, 1);
2257 * verify any preceding AUTH chunk that was skipped
2259 /* pull the local authentication parameters from the cookie/init-ack */
2260 sctp_auth_get_cookie_params(stcb, m,
2261 initack_offset + sizeof(struct sctp_init_ack_chunk),
2262 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2264 struct sctp_auth_chunk *auth;
2266 auth = (struct sctp_auth_chunk *)
2267 sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2268 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2269 /* auth HMAC failed, dump the assoc and packet */
2270 SCTPDBG(SCTP_DEBUG_AUTH1,
2271 "COOKIE-ECHO: AUTH failed\n");
2272 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2273 atomic_add_int(&stcb->asoc.refcnt, 1);
2274 SCTP_TCB_UNLOCK(stcb);
2275 SCTP_SOCKET_LOCK(so, 1);
2276 SCTP_TCB_LOCK(stcb);
2277 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2279 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2280 SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
2281 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2282 SCTP_SOCKET_UNLOCK(so, 1);
2286 /* remaining chunks checked... good to go */
2287 stcb->asoc.authenticated = 1;
2292 * if we're doing ASCONFs, check to see if we have any new local
2293 * addresses that need to get added to the peer (eg. addresses
2294 * changed while cookie echo in flight). This needs to be done
2295 * after we go to the OPEN state to do the correct asconf
2296 * processing. else, make sure we have the correct addresses in our
2300 /* warning, we re-use sin, sin6, sa_store here! */
2301 /* pull in local_address (our "from" address) */
2302 switch (cookie->laddr_type) {
2304 case SCTP_IPV4_ADDRESS:
2305 /* source addr is IPv4 */
2306 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2307 store.sin.sin_family = AF_INET;
2308 store.sin.sin_len = sizeof(struct sockaddr_in);
2309 store.sin.sin_addr.s_addr = cookie->laddress[0];
2313 case SCTP_IPV6_ADDRESS:
2314 /* source addr is IPv6 */
2315 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2316 store.sin6.sin6_family = AF_INET6;
2317 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2318 store.sin6.sin6_scope_id = cookie->scope_id;
2319 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2323 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2324 atomic_add_int(&stcb->asoc.refcnt, 1);
2325 SCTP_TCB_UNLOCK(stcb);
2326 SCTP_SOCKET_LOCK(so, 1);
2327 SCTP_TCB_LOCK(stcb);
2328 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2330 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2331 SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
2332 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2333 SCTP_SOCKET_UNLOCK(so, 1);
2338 /* update current state */
2339 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2340 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2341 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2342 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2343 stcb->sctp_ep, stcb, asoc->primary_destination);
2345 sctp_stop_all_cookie_timers(stcb);
2346 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2347 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2349 /* set up to notify upper layer */
2350 *notification = SCTP_NOTIFY_ASSOC_UP;
2351 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2352 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2353 (!SCTP_IS_LISTENING(inp))) {
2355 * This is an endpoint that called connect() how it got a
2356 * cookie that is NEW is a bit of a mystery. It must be that
2357 * the INIT was sent, but before it got there.. a complete
2358 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2359 * should have went to the other code.. not here.. oh well..
2360 * a bit of protection is worth having..
2362 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2363 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2364 atomic_add_int(&stcb->asoc.refcnt, 1);
2365 SCTP_TCB_UNLOCK(stcb);
2366 SCTP_SOCKET_LOCK(so, 1);
2367 SCTP_TCB_LOCK(stcb);
2368 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2369 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2370 SCTP_SOCKET_UNLOCK(so, 1);
2374 soisconnected(stcb->sctp_socket);
2375 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2376 SCTP_SOCKET_UNLOCK(so, 1);
2378 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2379 (SCTP_IS_LISTENING(inp))) {
2381 * We don't want to do anything with this one. Since it is
2382 * the listening guy. The timer will get started for
2383 * accepted connections in the caller.
2387 /* since we did not send a HB make sure we don't double things */
2388 if ((netp) && (*netp))
2389 (*netp)->hb_responded = 1;
2391 if (stcb->asoc.sctp_autoclose_ticks &&
2392 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2393 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2395 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2396 if ((netp != NULL) && (*netp != NULL)) {
2399 /* calculate the RTT and set the encaps port */
2400 old.tv_sec = cookie->time_entered.tv_sec;
2401 old.tv_usec = cookie->time_entered.tv_usec;
2402 (*netp)->RTO = sctp_calculate_rto(stcb, asoc, *netp,
2403 &old, SCTP_RTT_FROM_NON_DATA);
2405 /* respond with a COOKIE-ACK */
2406 sctp_send_cookie_ack(stcb);
2409 * check the address lists for any ASCONFs that need to be sent
2410 * AFTER the cookie-ack is sent
2412 sctp_check_address_list(stcb, m,
2413 initack_offset + sizeof(struct sctp_init_ack_chunk),
2414 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2415 &store.sa, cookie->local_scope, cookie->site_scope,
2416 cookie->ipv4_scope, cookie->loopback_scope);
2423 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2424 * we NEED to make sure we are not already using the vtag. If so we
2425 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2426 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2427 SCTP_BASE_INFO(hashasocmark))];
2428 LIST_FOREACH(stcb, head, sctp_asocs) {
2429 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2430 -- SEND ABORT - TRY AGAIN --
2436 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2437 * existing (non-NULL) TCB
2439 static struct mbuf *
2440 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2441 struct sockaddr *src, struct sockaddr *dst,
2442 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2443 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2444 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2445 struct sctp_tcb **locked_tcb,
2446 uint8_t mflowtype, uint32_t mflowid,
2447 uint32_t vrf_id, uint16_t port)
2449 struct sctp_state_cookie *cookie;
2450 struct sctp_tcb *l_stcb = *stcb;
2451 struct sctp_inpcb *l_inp;
2452 struct sockaddr *to;
2453 struct sctp_pcb *ep;
2455 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2457 uint8_t cookie_ok = 0;
2458 unsigned int sig_offset, cookie_offset;
2459 unsigned int cookie_len;
2461 struct timeval time_expires;
2462 int notification = 0;
2463 struct sctp_nets *netl;
2464 int had_a_existing_tcb = 0;
2465 int send_int_conf = 0;
2467 struct sockaddr_in sin;
2470 struct sockaddr_in6 sin6;
2473 SCTPDBG(SCTP_DEBUG_INPUT2,
2474 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2476 if (inp_p == NULL) {
2479 cookie = &cp->cookie;
2480 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2481 cookie_len = ntohs(cp->ch.chunk_length);
2483 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2484 sizeof(struct sctp_init_chunk) +
2485 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2486 /* cookie too small */
2489 if ((cookie->peerport != sh->src_port) ||
2490 (cookie->myport != sh->dest_port) ||
2491 (cookie->my_vtag != sh->v_tag)) {
2493 * invalid ports or bad tag. Note that we always leave the
2494 * v_tag in the header in network order and when we stored
2495 * it in the my_vtag slot we also left it in network order.
2496 * This maintains the match even though it may be in the
2497 * opposite byte order of the machine :->
2502 * split off the signature into its own mbuf (since it should not be
2503 * calculated in the sctp_hmac_m() call).
2505 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2506 m_sig = m_split(m, sig_offset, M_NOWAIT);
2507 if (m_sig == NULL) {
2508 /* out of memory or ?? */
2511 #ifdef SCTP_MBUF_LOGGING
2512 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2513 sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
2518 * compute the signature/digest for the cookie
2520 ep = &(*inp_p)->sctp_ep;
2523 SCTP_TCB_UNLOCK(l_stcb);
2525 SCTP_INP_RLOCK(l_inp);
2527 SCTP_TCB_LOCK(l_stcb);
2529 /* which cookie is it? */
2530 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2531 (ep->current_secret_number != ep->last_secret_number)) {
2532 /* it's the old cookie */
2533 (void)sctp_hmac_m(SCTP_HMAC,
2534 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2535 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2537 /* it's the current cookie */
2538 (void)sctp_hmac_m(SCTP_HMAC,
2539 (uint8_t *)ep->secret_key[(int)ep->current_secret_number],
2540 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2542 /* get the signature */
2543 SCTP_INP_RUNLOCK(l_inp);
2544 sig = (uint8_t *)sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *)&tmp_sig);
2546 /* couldn't find signature */
2547 sctp_m_freem(m_sig);
2550 /* compare the received digest with the computed digest */
2551 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2552 /* try the old cookie? */
2553 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2554 (ep->current_secret_number != ep->last_secret_number)) {
2555 /* compute digest with old */
2556 (void)sctp_hmac_m(SCTP_HMAC,
2557 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2558 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2560 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2568 * Now before we continue we must reconstruct our mbuf so that
2569 * normal processing of any other chunks will work.
2575 while (SCTP_BUF_NEXT(m_at) != NULL) {
2576 m_at = SCTP_BUF_NEXT(m_at);
2578 SCTP_BUF_NEXT(m_at) = m_sig;
2581 if (cookie_ok == 0) {
2582 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2583 SCTPDBG(SCTP_DEBUG_INPUT2,
2584 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2585 (uint32_t)offset, cookie_offset, sig_offset);
2590 * check the cookie timestamps to be sure it's not stale
2592 (void)SCTP_GETTIME_TIMEVAL(&now);
2593 /* Expire time is in Ticks, so we convert to seconds */
2594 time_expires.tv_sec = cookie->time_entered.tv_sec + TICKS_TO_SEC(cookie->cookie_life);
2595 time_expires.tv_usec = cookie->time_entered.tv_usec;
2596 if (timevalcmp(&now, &time_expires, >)) {
2597 /* cookie is stale! */
2598 struct mbuf *op_err;
2599 struct sctp_error_stale_cookie *cause;
2600 struct timeval diff;
2603 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
2604 0, M_NOWAIT, 1, MT_DATA);
2605 if (op_err == NULL) {
2610 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
2611 cause = mtod(op_err, struct sctp_error_stale_cookie *);
2612 cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
2613 cause->cause.length = htons((sizeof(struct sctp_paramhdr) +
2614 (sizeof(uint32_t))));
2616 timevalsub(&diff, &time_expires);
2617 if ((uint32_t)diff.tv_sec > UINT32_MAX / 1000000) {
2618 staleness = UINT32_MAX;
2620 staleness = diff.tv_sec * 1000000;
2622 if (UINT32_MAX - staleness >= (uint32_t)diff.tv_usec) {
2623 staleness += diff.tv_usec;
2625 staleness = UINT32_MAX;
2627 cause->stale_time = htonl(staleness);
2628 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2629 mflowtype, mflowid, l_inp->fibnum,
2634 * Now we must see with the lookup address if we have an existing
2635 * asoc. This will only happen if we were in the COOKIE-WAIT state
2636 * and a INIT collided with us and somewhere the peer sent the
2637 * cookie on another address besides the single address our assoc
2638 * had for him. In this case we will have one of the tie-tags set at
2639 * least AND the address field in the cookie can be used to look it
2643 switch (cookie->addr_type) {
2645 case SCTP_IPV6_ADDRESS:
2646 memset(&sin6, 0, sizeof(sin6));
2647 sin6.sin6_family = AF_INET6;
2648 sin6.sin6_len = sizeof(sin6);
2649 sin6.sin6_port = sh->src_port;
2650 sin6.sin6_scope_id = cookie->scope_id;
2651 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2652 sizeof(sin6.sin6_addr.s6_addr));
2653 to = (struct sockaddr *)&sin6;
2657 case SCTP_IPV4_ADDRESS:
2658 memset(&sin, 0, sizeof(sin));
2659 sin.sin_family = AF_INET;
2660 sin.sin_len = sizeof(sin);
2661 sin.sin_port = sh->src_port;
2662 sin.sin_addr.s_addr = cookie->address[0];
2663 to = (struct sockaddr *)&sin;
2667 /* This should not happen */
2670 if (*stcb == NULL) {
2671 /* Yep, lets check */
2672 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2673 if (*stcb == NULL) {
2675 * We should have only got back the same inp. If we
2676 * got back a different ep we have a problem. The
2677 * original findep got back l_inp and now
2679 if (l_inp != *inp_p) {
2680 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2683 if (*locked_tcb == NULL) {
2685 * In this case we found the assoc only
2686 * after we locked the create lock. This
2687 * means we are in a colliding case and we
2688 * must make sure that we unlock the tcb if
2689 * its one of the cases where we throw away
2690 * the incoming packets.
2692 *locked_tcb = *stcb;
2695 * We must also increment the inp ref count
2696 * since the ref_count flags was set when we
2697 * did not find the TCB, now we found it
2698 * which reduces the refcount.. we must
2699 * raise it back out to balance it all :-)
2701 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2702 if ((*stcb)->sctp_ep != l_inp) {
2703 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2704 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2710 cookie_len -= SCTP_SIGNATURE_SIZE;
2711 if (*stcb == NULL) {
2712 /* this is the "normal" case... get a new TCB */
2713 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2714 cookie, cookie_len, *inp_p,
2715 netp, to, ¬ification,
2716 auth_skipped, auth_offset, auth_len,
2720 /* this is abnormal... cookie-echo on existing TCB */
2721 had_a_existing_tcb = 1;
2722 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2724 cookie, cookie_len, *inp_p, *stcb, netp, to,
2725 ¬ification, auth_skipped, auth_offset, auth_len,
2730 if (*stcb == NULL) {
2731 /* still no TCB... must be bad cookie-echo */
2734 if (*netp != NULL) {
2735 (*netp)->flowtype = mflowtype;
2736 (*netp)->flowid = mflowid;
2739 * Ok, we built an association so confirm the address we sent the
2742 netl = sctp_findnet(*stcb, to);
2744 * This code should in theory NOT run but
2747 /* TSNH! Huh, why do I need to add this address here? */
2748 if (sctp_add_remote_addr(*stcb, to, NULL, port,
2749 SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2752 netl = sctp_findnet(*stcb, to);
2755 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2756 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2757 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2762 sctp_start_net_timers(*stcb);
2763 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2764 if (!had_a_existing_tcb ||
2765 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2767 * If we have a NEW cookie or the connect never
2768 * reached the connected state during collision we
2769 * must do the TCP accept thing.
2771 struct socket *so, *oso;
2772 struct sctp_inpcb *inp;
2774 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2776 * For a restart we will keep the same
2777 * socket, no need to do anything. I THINK!!
2779 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2780 if (send_int_conf) {
2781 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2782 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2786 oso = (*inp_p)->sctp_socket;
2787 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2788 SCTP_TCB_UNLOCK((*stcb));
2789 CURVNET_SET(oso->so_vnet);
2790 so = sonewconn(oso, 0
2793 SCTP_TCB_LOCK((*stcb));
2794 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2797 struct mbuf *op_err;
2798 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2799 struct socket *pcb_so;
2801 /* Too many sockets */
2802 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2803 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2804 sctp_abort_association(*inp_p, NULL, m, iphlen,
2805 src, dst, sh, op_err,
2808 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2809 pcb_so = SCTP_INP_SO(*inp_p);
2810 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2811 SCTP_TCB_UNLOCK((*stcb));
2812 SCTP_SOCKET_LOCK(pcb_so, 1);
2813 SCTP_TCB_LOCK((*stcb));
2814 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2816 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2817 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2818 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2819 SCTP_SOCKET_UNLOCK(pcb_so, 1);
2823 inp = (struct sctp_inpcb *)so->so_pcb;
2824 SCTP_INP_INCR_REF(inp);
2826 * We add the unbound flag here so that if we get an
2827 * soabort() before we get the move_pcb done, we
2828 * will properly cleanup.
2830 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2831 SCTP_PCB_FLAGS_CONNECTED |
2832 SCTP_PCB_FLAGS_IN_TCPPOOL |
2833 SCTP_PCB_FLAGS_UNBOUND |
2834 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2835 SCTP_PCB_FLAGS_DONT_WAKE);
2836 inp->sctp_features = (*inp_p)->sctp_features;
2837 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2838 inp->sctp_socket = so;
2839 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2840 inp->max_cwnd = (*inp_p)->max_cwnd;
2841 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2842 inp->ecn_supported = (*inp_p)->ecn_supported;
2843 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2844 inp->auth_supported = (*inp_p)->auth_supported;
2845 inp->asconf_supported = (*inp_p)->asconf_supported;
2846 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2847 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2848 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2849 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2850 inp->sctp_context = (*inp_p)->sctp_context;
2851 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2852 inp->fibnum = (*inp_p)->fibnum;
2853 inp->inp_starting_point_for_iterator = NULL;
2855 * copy in the authentication parameters from the
2858 if (inp->sctp_ep.local_hmacs)
2859 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2860 inp->sctp_ep.local_hmacs =
2861 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2862 if (inp->sctp_ep.local_auth_chunks)
2863 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2864 inp->sctp_ep.local_auth_chunks =
2865 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2868 * Now we must move it from one hash table to
2869 * another and get the tcb in the right place.
2873 * This is where the one-2-one socket is put into
2874 * the accept state waiting for the accept!
2877 SCTP_ADD_SUBSTATE(*stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
2879 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2881 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2882 SCTP_TCB_UNLOCK((*stcb));
2884 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2886 SCTP_TCB_LOCK((*stcb));
2887 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2891 * now we must check to see if we were aborted while
2892 * the move was going on and the lock/unlock
2895 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2897 * yep it was, we leave the assoc attached
2898 * to the socket since the sctp_inpcb_free()
2899 * call will send an abort for us.
2901 SCTP_INP_DECR_REF(inp);
2904 SCTP_INP_DECR_REF(inp);
2905 /* Switch over to the new guy */
2907 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2908 if (send_int_conf) {
2909 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2910 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2914 * Pull it from the incomplete queue and wake the
2917 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2918 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2919 SCTP_TCB_UNLOCK((*stcb));
2920 SCTP_SOCKET_LOCK(so, 1);
2923 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2924 SCTP_TCB_LOCK((*stcb));
2925 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2926 SCTP_SOCKET_UNLOCK(so, 1);
2932 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2934 if (send_int_conf) {
2935 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2936 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2942 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2943 struct sctp_tcb *stcb, struct sctp_nets *net)
2945 /* cp must not be used, others call this without a c-ack :-) */
2946 struct sctp_association *asoc;
2948 SCTPDBG(SCTP_DEBUG_INPUT2,
2949 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2950 if ((stcb == NULL) || (net == NULL)) {
2955 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
2956 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
2957 asoc->overall_error_count,
2959 SCTP_FROM_SCTP_INPUT,
2962 asoc->overall_error_count = 0;
2963 sctp_stop_all_cookie_timers(stcb);
2964 /* process according to association state */
2965 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
2966 /* state change only needed when I am in right state */
2967 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2968 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2969 sctp_start_net_timers(stcb);
2970 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2971 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2972 stcb->sctp_ep, stcb, asoc->primary_destination);
2976 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2977 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2978 if (asoc->overall_error_count == 0) {
2979 net->RTO = sctp_calculate_rto(stcb, asoc, net,
2980 &asoc->time_entered,
2981 SCTP_RTT_FROM_NON_DATA);
2983 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2984 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2985 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2986 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2987 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2991 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2992 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2993 so = SCTP_INP_SO(stcb->sctp_ep);
2994 atomic_add_int(&stcb->asoc.refcnt, 1);
2995 SCTP_TCB_UNLOCK(stcb);
2996 SCTP_SOCKET_LOCK(so, 1);
2997 SCTP_TCB_LOCK(stcb);
2998 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3000 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
3001 soisconnected(stcb->sctp_socket);
3003 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3004 SCTP_SOCKET_UNLOCK(so, 1);
3008 * since we did not send a HB make sure we don't double
3011 net->hb_responded = 1;
3013 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
3015 * We don't need to do the asconf thing, nor hb or
3016 * autoclose if the socket is closed.
3021 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
3025 if (stcb->asoc.sctp_autoclose_ticks &&
3026 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
3027 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
3028 stcb->sctp_ep, stcb, NULL);
3031 * send ASCONF if parameters are pending and ASCONFs are
3032 * allowed (eg. addresses changed when init/cookie echo were
3035 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
3036 (stcb->asoc.asconf_supported == 1) &&
3037 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
3038 #ifdef SCTP_TIMER_BASED_ASCONF
3039 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
3040 stcb->sctp_ep, stcb,
3041 stcb->asoc.primary_destination);
3043 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
3044 SCTP_ADDR_NOT_LOCKED);
3049 /* Toss the cookie if I can */
3050 sctp_toss_old_cookies(stcb, asoc);
3051 if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3052 /* Restart the timer if we have pending data */
3053 struct sctp_tmit_chunk *chk;
3055 chk = TAILQ_FIRST(&asoc->sent_queue);
3056 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
3061 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
3062 struct sctp_tcb *stcb)
3064 struct sctp_nets *net;
3065 struct sctp_tmit_chunk *lchk;
3066 struct sctp_ecne_chunk bkup;
3067 uint8_t override_bit;
3068 uint32_t tsn, window_data_tsn;
3070 unsigned int pkt_cnt;
3072 len = ntohs(cp->ch.chunk_length);
3073 if ((len != sizeof(struct sctp_ecne_chunk)) &&
3074 (len != sizeof(struct old_sctp_ecne_chunk))) {
3077 if (len == sizeof(struct old_sctp_ecne_chunk)) {
3078 /* Its the old format */
3079 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
3080 bkup.num_pkts_since_cwr = htonl(1);
3083 SCTP_STAT_INCR(sctps_recvecne);
3084 tsn = ntohl(cp->tsn);
3085 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
3086 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
3088 window_data_tsn = stcb->asoc.sending_seq - 1;
3090 window_data_tsn = lchk->rec.data.tsn;
3093 /* Find where it was sent to if possible. */
3095 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
3096 if (lchk->rec.data.tsn == tsn) {
3098 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
3101 if (SCTP_TSN_GT(lchk->rec.data.tsn, tsn)) {
3107 * What to do. A previous send of a CWR was possibly lost.
3108 * See how old it is, we may have it marked on the actual
3111 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3112 if (tsn == net->last_cwr_tsn) {
3113 /* Found him, send it off */
3119 * If we reach here, we need to send a special CWR
3120 * that says hey, we did this a long time ago and
3121 * you lost the response.
3123 net = TAILQ_FIRST(&stcb->asoc.nets);
3128 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
3135 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
3136 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3138 * JRS - Use the congestion control given in the pluggable
3141 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
3143 * We reduce once every RTT. So we will only lower cwnd at
3144 * the next sending seq i.e. the window_data_tsn
3146 net->cwr_window_tsn = window_data_tsn;
3147 net->ecn_ce_pkt_cnt += pkt_cnt;
3148 net->lost_cnt = pkt_cnt;
3149 net->last_cwr_tsn = tsn;
3151 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
3152 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
3153 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3155 * Another loss in the same window update how many
3156 * marks/packets lost we have had.
3160 if (pkt_cnt > net->lost_cnt) {
3161 /* Should be the case */
3162 cnt = (pkt_cnt - net->lost_cnt);
3163 net->ecn_ce_pkt_cnt += cnt;
3165 net->lost_cnt = pkt_cnt;
3166 net->last_cwr_tsn = tsn;
3168 * Most CC functions will ignore this call, since we
3169 * are in-window yet of the initial CE the peer saw.
3171 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
3175 * We always send a CWR this way if our previous one was lost our
3176 * peer will get an update, or if it is not time again to reduce we
3177 * still get the cwr to the peer. Note we set the override when we
3178 * could not find the TSN on the chunk or the destination network.
3180 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
3184 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
3187 * Here we get a CWR from the peer. We must look in the outqueue and
3188 * make sure that we have a covered ECNE in the control chunk part.
3191 struct sctp_tmit_chunk *chk, *nchk;
3192 struct sctp_ecne_chunk *ecne;
3196 cwr_tsn = ntohl(cp->tsn);
3197 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
3198 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.control_send_queue, sctp_next, nchk) {
3199 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
3202 if ((override == 0) && (chk->whoTo != net)) {
3203 /* Must be from the right src unless override is set */
3206 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
3207 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
3208 /* this covers this ECNE, we can remove it */
3209 stcb->asoc.ecn_echo_cnt_onq--;
3210 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
3212 stcb->asoc.ctrl_queue_cnt--;
3213 sctp_m_freem(chk->data);
3215 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3216 if (override == 0) {
3224 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3225 struct sctp_tcb *stcb, struct sctp_nets *net)
3227 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3231 SCTPDBG(SCTP_DEBUG_INPUT2,
3232 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3236 /* process according to association state */
3237 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3238 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3239 SCTPDBG(SCTP_DEBUG_INPUT2,
3240 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3241 SCTP_TCB_UNLOCK(stcb);
3244 /* notify upper layer protocol */
3245 if (stcb->sctp_socket) {
3246 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3249 if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
3250 !TAILQ_EMPTY(&stcb->asoc.sent_queue) ||
3251 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
3252 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3255 /* stop the timer */
3256 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3257 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3258 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3260 SCTPDBG(SCTP_DEBUG_INPUT2,
3261 "sctp_handle_shutdown_complete: calls free-asoc\n");
3262 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3263 so = SCTP_INP_SO(stcb->sctp_ep);
3264 atomic_add_int(&stcb->asoc.refcnt, 1);
3265 SCTP_TCB_UNLOCK(stcb);
3266 SCTP_SOCKET_LOCK(so, 1);
3267 SCTP_TCB_LOCK(stcb);
3268 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3270 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3271 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3272 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3273 SCTP_SOCKET_UNLOCK(so, 1);
3279 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3280 struct sctp_nets *net, uint8_t flg)
3282 switch (desc->chunk_type) {
3284 /* find the tsn to resend (possibly */
3287 struct sctp_tmit_chunk *tp1;
3289 tsn = ntohl(desc->tsn_ifany);
3290 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3291 if (tp1->rec.data.tsn == tsn) {
3295 if (SCTP_TSN_GT(tp1->rec.data.tsn, tsn)) {
3303 * Do it the other way , aka without paying
3304 * attention to queue seq order.
3306 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3307 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3308 if (tp1->rec.data.tsn == tsn) {
3315 SCTP_STAT_INCR(sctps_pdrptsnnf);
3317 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3320 if (((flg & SCTP_BADCRC) == 0) &&
3321 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3324 if ((stcb->asoc.peers_rwnd == 0) &&
3325 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3326 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3329 if (stcb->asoc.peers_rwnd == 0 &&
3330 (flg & SCTP_FROM_MIDDLE_BOX)) {
3331 SCTP_STAT_INCR(sctps_pdrpdizrw);
3334 ddp = (uint8_t *)(mtod(tp1->data, caddr_t)+
3335 sizeof(struct sctp_data_chunk));
3339 for (iii = 0; iii < sizeof(desc->data_bytes);
3341 if (ddp[iii] != desc->data_bytes[iii]) {
3342 SCTP_STAT_INCR(sctps_pdrpbadd);
3350 * this guy had a RTO calculation
3351 * pending on it, cancel it
3353 if (tp1->whoTo->rto_needed == 0) {
3354 tp1->whoTo->rto_needed = 1;
3358 SCTP_STAT_INCR(sctps_pdrpmark);
3359 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3360 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3362 * mark it as if we were doing a FR, since
3363 * we will be getting gap ack reports behind
3364 * the info from the router.
3366 tp1->rec.data.doing_fast_retransmit = 1;
3368 * mark the tsn with what sequences can
3371 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3372 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3374 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
3377 /* restart the timer */
3378 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3380 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3381 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3384 /* fix counts and things */
3385 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3386 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3387 tp1->whoTo->flight_size,
3389 (uint32_t)(uintptr_t)stcb,
3392 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3393 sctp_flight_size_decrease(tp1);
3394 sctp_total_flight_decrease(stcb, tp1);
3396 tp1->sent = SCTP_DATAGRAM_RESEND;
3402 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3403 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3406 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3408 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3411 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3412 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3413 audit, stcb->asoc.sent_queue_retran_cnt);
3414 #ifndef SCTP_AUDITING_ENABLED
3415 stcb->asoc.sent_queue_retran_cnt = audit;
3423 struct sctp_tmit_chunk *asconf;
3425 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3427 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3432 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3433 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3434 asconf->sent = SCTP_DATAGRAM_RESEND;
3435 asconf->snd_count--;
3439 case SCTP_INITIATION:
3440 /* resend the INIT */
3441 stcb->asoc.dropped_special_cnt++;
3442 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3444 * If we can get it in, in a few attempts we do
3445 * this, otherwise we let the timer fire.
3447 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3449 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3450 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3453 case SCTP_SELECTIVE_ACK:
3454 case SCTP_NR_SELECTIVE_ACK:
3455 /* resend the sack */
3456 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3458 case SCTP_HEARTBEAT_REQUEST:
3459 /* resend a demand HB */
3460 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3462 * Only retransmit if we KNOW we wont destroy the
3465 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3469 sctp_send_shutdown(stcb, net);
3471 case SCTP_SHUTDOWN_ACK:
3472 sctp_send_shutdown_ack(stcb, net);
3474 case SCTP_COOKIE_ECHO:
3476 struct sctp_tmit_chunk *cookie;
3479 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3481 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3486 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3487 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3488 cookie->sent = SCTP_DATAGRAM_RESEND;
3489 sctp_stop_all_cookie_timers(stcb);
3493 case SCTP_COOKIE_ACK:
3494 sctp_send_cookie_ack(stcb);
3496 case SCTP_ASCONF_ACK:
3497 /* resend last asconf ack */
3498 sctp_send_asconf_ack(stcb);
3500 case SCTP_IFORWARD_CUM_TSN:
3501 case SCTP_FORWARD_CUM_TSN:
3502 send_forward_tsn(stcb, &stcb->asoc);
3504 /* can't do anything with these */
3505 case SCTP_PACKET_DROPPED:
3506 case SCTP_INITIATION_ACK: /* this should not happen */
3507 case SCTP_HEARTBEAT_ACK:
3508 case SCTP_ABORT_ASSOCIATION:
3509 case SCTP_OPERATION_ERROR:
3510 case SCTP_SHUTDOWN_COMPLETE:
3520 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3526 * We set things to 0xffffffff since this is the last delivered
3527 * sequence and we will be sending in 0 after the reset.
3530 if (number_entries) {
3531 for (i = 0; i < number_entries; i++) {
3532 temp = ntohs(list[i]);
3533 if (temp >= stcb->asoc.streamincnt) {
3536 stcb->asoc.strmin[temp].last_mid_delivered = 0xffffffff;
3540 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3541 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3544 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3548 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3553 if (number_entries > 0) {
3554 for (i = 0; i < number_entries; i++) {
3555 temp = ntohs(list[i]);
3556 if (temp >= stcb->asoc.streamoutcnt) {
3557 /* no such stream */
3560 stcb->asoc.strmout[temp].next_mid_ordered = 0;
3561 stcb->asoc.strmout[temp].next_mid_unordered = 0;
3564 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3565 stcb->asoc.strmout[i].next_mid_ordered = 0;
3566 stcb->asoc.strmout[i].next_mid_unordered = 0;
3569 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3573 sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3578 if (number_entries > 0) {
3579 for (i = 0; i < number_entries; i++) {
3580 temp = ntohs(list[i]);
3581 if (temp >= stcb->asoc.streamoutcnt) {
3582 /* no such stream */
3585 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3588 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3589 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3595 struct sctp_stream_reset_request *
3596 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3598 struct sctp_association *asoc;
3599 struct sctp_chunkhdr *ch;
3600 struct sctp_stream_reset_request *r;
3601 struct sctp_tmit_chunk *chk;
3605 if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
3606 asoc->stream_reset_outstanding = 0;
3609 if (stcb->asoc.str_reset == NULL) {
3610 asoc->stream_reset_outstanding = 0;
3613 chk = stcb->asoc.str_reset;
3614 if (chk->data == NULL) {
3618 /* he wants a copy of the chk pointer */
3621 clen = chk->send_size;
3622 ch = mtod(chk->data, struct sctp_chunkhdr *);
3623 r = (struct sctp_stream_reset_request *)(ch + 1);
3624 if (ntohl(r->request_seq) == seq) {
3628 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3629 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3630 /* move to the next one, there can only be a max of two */
3631 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3632 if (ntohl(r->request_seq) == seq) {
3636 /* that seq is not here */
3641 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3643 struct sctp_association *asoc;
3644 struct sctp_tmit_chunk *chk;
3647 chk = asoc->str_reset;
3651 asoc->str_reset = NULL;
3652 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3653 chk->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3654 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3655 asoc->ctrl_queue_cnt--;
3657 sctp_m_freem(chk->data);
3660 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3665 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3666 uint32_t seq, uint32_t action,
3667 struct sctp_stream_reset_response *respin)
3671 struct sctp_association *asoc = &stcb->asoc;
3672 struct sctp_tmit_chunk *chk;
3673 struct sctp_stream_reset_request *req_param;
3674 struct sctp_stream_reset_out_request *req_out_param;
3675 struct sctp_stream_reset_in_request *req_in_param;
3676 uint32_t number_entries;
3678 if (asoc->stream_reset_outstanding == 0) {
3682 if (seq == stcb->asoc.str_reset_seq_out) {
3683 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3684 if (req_param != NULL) {
3685 stcb->asoc.str_reset_seq_out++;
3686 type = ntohs(req_param->ph.param_type);
3687 lparam_len = ntohs(req_param->ph.param_length);
3688 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3691 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3692 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3693 asoc->stream_reset_out_is_outstanding = 0;
3694 if (asoc->stream_reset_outstanding)
3695 asoc->stream_reset_outstanding--;
3696 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3698 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3699 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3700 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3701 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3703 * Set it up so we don't stop
3706 asoc->stream_reset_outstanding++;
3707 stcb->asoc.str_reset_seq_out--;
3708 asoc->stream_reset_out_is_outstanding = 1;
3711 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3713 if (no_clear == 0) {
3714 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3716 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3717 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3718 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3719 if (asoc->stream_reset_outstanding)
3720 asoc->stream_reset_outstanding--;
3721 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3722 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3723 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3724 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3725 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3726 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3728 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3729 /* Ok we now may have more streams */
3732 num_stream = stcb->asoc.strm_pending_add_size;
3733 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3735 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3737 stcb->asoc.strm_pending_add_size = 0;
3738 if (asoc->stream_reset_outstanding)
3739 asoc->stream_reset_outstanding--;
3740 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3741 /* Put the new streams into effect */
3744 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3745 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3747 asoc->streamoutcnt += num_stream;
3748 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3749 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3750 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3751 SCTP_STREAM_CHANGE_DENIED);
3753 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3754 SCTP_STREAM_CHANGE_FAILED);
3756 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3757 if (asoc->stream_reset_outstanding)
3758 asoc->stream_reset_outstanding--;
3759 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3760 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3761 SCTP_STREAM_CHANGE_DENIED);
3762 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3763 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3764 SCTP_STREAM_CHANGE_FAILED);
3766 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3768 * a) Adopt the new in tsn.
3770 * c) Adopt the new out-tsn
3772 struct sctp_stream_reset_response_tsn *resp;
3773 struct sctp_forward_tsn_chunk fwdtsn;
3776 if (respin == NULL) {
3780 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3783 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3784 resp = (struct sctp_stream_reset_response_tsn *)respin;
3785 asoc->stream_reset_outstanding--;
3786 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3787 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3788 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3789 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3793 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3794 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3795 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3798 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3799 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3800 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3802 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3803 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3805 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3806 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3808 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3809 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3810 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3811 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3812 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3813 SCTP_ASSOC_RESET_DENIED);
3815 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3816 SCTP_ASSOC_RESET_FAILED);
3819 /* get rid of the request and get the request flags */
3820 if (asoc->stream_reset_outstanding == 0) {
3821 sctp_clean_up_stream_reset(stcb);
3825 if (asoc->stream_reset_outstanding == 0) {
3826 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3832 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3833 struct sctp_tmit_chunk *chk,
3834 struct sctp_stream_reset_in_request *req, int trunc)
3842 * peer wants me to send a str-reset to him for my outgoing seq's if
3845 struct sctp_association *asoc = &stcb->asoc;
3847 seq = ntohl(req->request_seq);
3848 if (asoc->str_reset_seq_in == seq) {
3849 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3850 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3851 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3853 /* Can't do it, since they exceeded our buffer size */
3854 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3855 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3856 len = ntohs(req->ph.param_length);
3857 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3858 if (number_entries) {
3859 for (i = 0; i < number_entries; i++) {
3860 temp = ntohs(req->list_of_streams[i]);
3861 if (temp >= stcb->asoc.streamoutcnt) {
3862 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3865 req->list_of_streams[i] = temp;
3867 for (i = 0; i < number_entries; i++) {
3868 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3869 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3874 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3875 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3876 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3879 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3881 /* Can't do it, since we have sent one out */
3882 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3885 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3886 asoc->str_reset_seq_in++;
3887 } else if (asoc->str_reset_seq_in - 1 == seq) {
3888 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3889 } else if (asoc->str_reset_seq_in - 2 == seq) {
3890 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3892 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3894 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3898 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3899 struct sctp_tmit_chunk *chk,
3900 struct sctp_stream_reset_tsn_request *req)
3902 /* reset all in and out and update the tsn */
3904 * A) reset my str-seq's on in and out. B) Select a receive next,
3905 * and set cum-ack to it. Also process this selected number as a
3906 * fwd-tsn as well. C) set in the response my next sending seq.
3908 struct sctp_forward_tsn_chunk fwdtsn;
3909 struct sctp_association *asoc = &stcb->asoc;
3913 seq = ntohl(req->request_seq);
3914 if (asoc->str_reset_seq_in == seq) {
3915 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3916 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3917 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3919 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3920 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3921 fwdtsn.ch.chunk_flags = 0;
3922 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3923 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3927 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3928 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3929 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3931 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3932 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3933 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3934 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3935 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3936 atomic_add_int(&asoc->sending_seq, 1);
3937 /* save off historical data for retrans */
3938 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3939 asoc->last_sending_seq[0] = asoc->sending_seq;
3940 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3941 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3942 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3943 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3944 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3945 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3947 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3948 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3949 asoc->str_reset_seq_in++;
3950 } else if (asoc->str_reset_seq_in - 1 == seq) {
3951 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3952 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3953 } else if (asoc->str_reset_seq_in - 2 == seq) {
3954 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3955 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3957 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3963 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3964 struct sctp_tmit_chunk *chk,
3965 struct sctp_stream_reset_out_request *req, int trunc)
3968 int number_entries, len;
3969 struct sctp_association *asoc = &stcb->asoc;
3971 seq = ntohl(req->request_seq);
3973 /* now if its not a duplicate we process it */
3974 if (asoc->str_reset_seq_in == seq) {
3975 len = ntohs(req->ph.param_length);
3976 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3978 * the sender is resetting, handle the list issue.. we must
3979 * a) verify if we can do the reset, if so no problem b) If
3980 * we can't do the reset we must copy the request. c) queue
3981 * it, and setup the data in processor to trigger it off
3982 * when needed and dequeue all the queued data.
3984 tsn = ntohl(req->send_reset_at_tsn);
3986 /* move the reset action back one */
3987 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3988 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3989 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3991 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3992 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
3993 /* we can do it now */
3994 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
3995 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3998 * we must queue it up and thus wait for the TSN's
3999 * to arrive that are at or before tsn
4001 struct sctp_stream_reset_list *liste;
4004 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
4005 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
4006 siz, SCTP_M_STRESET);
4007 if (liste == NULL) {
4008 /* gak out of memory */
4009 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4010 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4015 liste->number_entries = number_entries;
4016 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
4017 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
4018 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
4020 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4021 asoc->str_reset_seq_in++;
4022 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4024 * one seq back, just echo back last action since my
4025 * response was lost.
4027 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4028 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4030 * two seq back, just echo back last action since my
4031 * response was lost.
4033 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4035 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4040 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
4041 struct sctp_stream_reset_add_strm *str_add)
4044 * Peer is requesting to add more streams. If its within our
4045 * max-streams we will allow it.
4047 uint32_t num_stream, i;
4049 struct sctp_association *asoc = &stcb->asoc;
4050 struct sctp_queued_to_read *ctl, *nctl;
4052 /* Get the number. */
4053 seq = ntohl(str_add->request_seq);
4054 num_stream = ntohs(str_add->number_of_streams);
4055 /* Now what would be the new total? */
4056 if (asoc->str_reset_seq_in == seq) {
4057 num_stream += stcb->asoc.streamincnt;
4058 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4059 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4060 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4061 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
4062 (num_stream > 0xffff)) {
4063 /* We must reject it they ask for to many */
4065 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4067 /* Ok, we can do that :-) */
4068 struct sctp_stream_in *oldstrm;
4070 /* save off the old */
4071 oldstrm = stcb->asoc.strmin;
4072 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
4073 (num_stream * sizeof(struct sctp_stream_in)),
4075 if (stcb->asoc.strmin == NULL) {
4076 stcb->asoc.strmin = oldstrm;
4079 /* copy off the old data */
4080 for (i = 0; i < stcb->asoc.streamincnt; i++) {
4081 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
4082 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
4083 stcb->asoc.strmin[i].sid = i;
4084 stcb->asoc.strmin[i].last_mid_delivered = oldstrm[i].last_mid_delivered;
4085 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
4086 stcb->asoc.strmin[i].pd_api_started = oldstrm[i].pd_api_started;
4087 /* now anything on those queues? */
4088 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next_instrm, nctl) {
4089 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next_instrm);
4090 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next_instrm);
4092 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].uno_inqueue, next_instrm, nctl) {
4093 TAILQ_REMOVE(&oldstrm[i].uno_inqueue, ctl, next_instrm);
4094 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].uno_inqueue, ctl, next_instrm);
4097 /* Init the new streams */
4098 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
4099 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
4100 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
4101 stcb->asoc.strmin[i].sid = i;
4102 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
4103 stcb->asoc.strmin[i].pd_api_started = 0;
4104 stcb->asoc.strmin[i].delivery_started = 0;
4106 SCTP_FREE(oldstrm, SCTP_M_STRMI);
4107 /* update the size */
4108 stcb->asoc.streamincnt = num_stream;
4109 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4110 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
4112 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4113 asoc->str_reset_seq_in++;
4114 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4116 * one seq back, just echo back last action since my
4117 * response was lost.
4119 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4120 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4122 * two seq back, just echo back last action since my
4123 * response was lost.
4125 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4127 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4133 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
4134 struct sctp_stream_reset_add_strm *str_add)
4137 * Peer is requesting to add more streams. If its within our
4138 * max-streams we will allow it.
4140 uint16_t num_stream;
4142 struct sctp_association *asoc = &stcb->asoc;
4144 /* Get the number. */
4145 seq = ntohl(str_add->request_seq);
4146 num_stream = ntohs(str_add->number_of_streams);
4147 /* Now what would be the new total? */
4148 if (asoc->str_reset_seq_in == seq) {
4149 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4150 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4151 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4152 } else if (stcb->asoc.stream_reset_outstanding) {
4153 /* We must reject it we have something pending */
4154 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
4156 /* Ok, we can do that :-) */
4159 mychk = stcb->asoc.streamoutcnt;
4160 mychk += num_stream;
4161 if (mychk < 0x10000) {
4162 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4163 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
4164 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4167 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4170 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
4171 asoc->str_reset_seq_in++;
4172 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4174 * one seq back, just echo back last action since my
4175 * response was lost.
4177 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4178 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4180 * two seq back, just echo back last action since my
4181 * response was lost.
4183 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4185 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4190 __attribute__((noinline))
4193 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
4194 struct sctp_chunkhdr *ch_req)
4196 uint16_t remaining_length, param_len, ptype;
4197 struct sctp_paramhdr pstore;
4198 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
4202 struct sctp_tmit_chunk *chk;
4203 struct sctp_chunkhdr *ch;
4204 struct sctp_paramhdr *ph;
4208 /* now it may be a reset or a reset-response */
4209 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
4211 /* setup for adding the response */
4212 sctp_alloc_a_chunk(stcb, chk);
4216 chk->copy_by_ref = 0;
4217 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
4218 chk->rec.chunk_id.can_take_data = 0;
4220 chk->asoc = &stcb->asoc;
4221 chk->no_fr_allowed = 0;
4222 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
4223 chk->book_size_scale = 0;
4224 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
4225 if (chk->data == NULL) {
4228 sctp_m_freem(chk->data);
4231 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
4234 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
4236 /* setup chunk parameters */
4237 chk->sent = SCTP_DATAGRAM_UNSENT;
4241 ch = mtod(chk->data, struct sctp_chunkhdr *);
4242 ch->chunk_type = SCTP_STREAM_RESET;
4243 ch->chunk_flags = 0;
4244 ch->chunk_length = htons(chk->send_size);
4245 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4246 offset += sizeof(struct sctp_chunkhdr);
4247 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
4248 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *)&pstore);
4253 param_len = ntohs(ph->param_length);
4254 if ((param_len > remaining_length) ||
4255 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
4256 /* bad parameter length */
4259 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
4260 (uint8_t *)&cstore);
4265 ptype = ntohs(ph->param_type);
4267 if (param_len > sizeof(cstore)) {
4272 if (num_param > SCTP_MAX_RESET_PARAMS) {
4273 /* hit the max of parameters already sorry.. */
4276 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4277 struct sctp_stream_reset_out_request *req_out;
4279 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4282 req_out = (struct sctp_stream_reset_out_request *)ph;
4284 if (stcb->asoc.stream_reset_outstanding) {
4285 seq = ntohl(req_out->response_seq);
4286 if (seq == stcb->asoc.str_reset_seq_out) {
4288 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4291 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4292 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4293 struct sctp_stream_reset_add_strm *str_add;
4295 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4298 str_add = (struct sctp_stream_reset_add_strm *)ph;
4300 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4301 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4302 struct sctp_stream_reset_add_strm *str_add;
4304 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4307 str_add = (struct sctp_stream_reset_add_strm *)ph;
4309 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4310 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4311 struct sctp_stream_reset_in_request *req_in;
4314 req_in = (struct sctp_stream_reset_in_request *)ph;
4315 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4316 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4317 struct sctp_stream_reset_tsn_request *req_tsn;
4320 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4321 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4323 goto strres_nochunk;
4327 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4328 struct sctp_stream_reset_response *resp;
4331 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4334 resp = (struct sctp_stream_reset_response *)ph;
4335 seq = ntohl(resp->response_seq);
4336 result = ntohl(resp->result);
4337 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4339 goto strres_nochunk;
4344 offset += SCTP_SIZE32(param_len);
4345 if (remaining_length >= SCTP_SIZE32(param_len)) {
4346 remaining_length -= SCTP_SIZE32(param_len);
4348 remaining_length = 0;
4352 /* we have no response free the stuff */
4353 goto strres_nochunk;
4355 /* ok we have a chunk to link in */
4356 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4359 stcb->asoc.ctrl_queue_cnt++;
4364 * Handle a router or endpoints report of a packet loss, there are two ways
4365 * to handle this, either we get the whole packet and must disect it
4366 * ourselves (possibly with truncation and or corruption) or it is a summary
4367 * from a middle box that did the disectting for us.
4370 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4371 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4373 uint32_t bottle_bw, on_queue;
4377 struct sctp_chunk_desc desc;
4378 struct sctp_chunkhdr *ch;
4380 chlen = ntohs(cp->ch.chunk_length);
4381 chlen -= sizeof(struct sctp_pktdrop_chunk);
4382 /* XXX possible chlen underflow */
4385 if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)
4386 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4388 ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr));
4389 chlen -= sizeof(struct sctphdr);
4390 /* XXX possible chlen underflow */
4391 memset(&desc, 0, sizeof(desc));
4393 trunc_len = (uint16_t)ntohs(cp->trunc_len);
4394 if (trunc_len > limit) {
4398 /* now the chunks themselves */
4399 while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) {
4400 desc.chunk_type = ch->chunk_type;
4401 /* get amount we need to move */
4402 at = ntohs(ch->chunk_length);
4403 if (at < sizeof(struct sctp_chunkhdr)) {
4404 /* corrupt chunk, maybe at the end? */
4405 SCTP_STAT_INCR(sctps_pdrpcrupt);
4408 if (trunc_len == 0) {
4409 /* we are supposed to have all of it */
4411 /* corrupt skip it */
4412 SCTP_STAT_INCR(sctps_pdrpcrupt);
4416 /* is there enough of it left ? */
4417 if (desc.chunk_type == SCTP_DATA) {
4418 if (chlen < (sizeof(struct sctp_data_chunk) +
4419 sizeof(desc.data_bytes))) {
4423 if (chlen < sizeof(struct sctp_chunkhdr)) {
4428 if (desc.chunk_type == SCTP_DATA) {
4429 /* can we get out the tsn? */
4430 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4431 SCTP_STAT_INCR(sctps_pdrpmbda);
4433 if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) {
4435 struct sctp_data_chunk *dcp;
4439 dcp = (struct sctp_data_chunk *)ch;
4440 ddp = (uint8_t *)(dcp + 1);
4441 for (iii = 0; iii < sizeof(desc.data_bytes); iii++) {
4442 desc.data_bytes[iii] = ddp[iii];
4444 desc.tsn_ifany = dcp->dp.tsn;
4446 /* nope we are done. */
4447 SCTP_STAT_INCR(sctps_pdrpnedat);
4451 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4452 SCTP_STAT_INCR(sctps_pdrpmbct);
4455 if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) {
4456 SCTP_STAT_INCR(sctps_pdrppdbrk);
4459 if (SCTP_SIZE32(at) > chlen) {
4462 chlen -= SCTP_SIZE32(at);
4463 if (chlen < sizeof(struct sctp_chunkhdr)) {
4464 /* done, none left */
4467 ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at));
4469 /* Now update any rwnd --- possibly */
4470 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4471 /* From a peer, we get a rwnd report */
4474 SCTP_STAT_INCR(sctps_pdrpfehos);
4476 bottle_bw = ntohl(cp->bottle_bw);
4477 on_queue = ntohl(cp->current_onq);
4478 if (bottle_bw && on_queue) {
4479 /* a rwnd report is in here */
4480 if (bottle_bw > on_queue)
4481 a_rwnd = bottle_bw - on_queue;
4486 stcb->asoc.peers_rwnd = 0;
4488 if (a_rwnd > stcb->asoc.total_flight) {
4489 stcb->asoc.peers_rwnd =
4490 a_rwnd - stcb->asoc.total_flight;
4492 stcb->asoc.peers_rwnd = 0;
4494 if (stcb->asoc.peers_rwnd <
4495 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4496 /* SWS sender side engages */
4497 stcb->asoc.peers_rwnd = 0;
4502 SCTP_STAT_INCR(sctps_pdrpfmbox);
4505 /* now middle boxes in sat networks get a cwnd bump */
4506 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) &&
4507 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4508 (stcb->asoc.sat_network)) {
4510 * This is debatable but for sat networks it makes sense
4511 * Note if a T3 timer has went off, we will prohibit any
4512 * changes to cwnd until we exit the t3 loss recovery.
4514 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4515 net, cp, &bottle_bw, &on_queue);
4520 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4521 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4522 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4523 * length of the complete packet outputs: - length: modified to remaining
4524 * length after control processing - netp: modified to new sctp_nets after
4525 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4526 * bad packet,...) otherwise return the tcb for this packet
4529 __attribute__((noinline))
4531 static struct sctp_tcb *
4532 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4533 struct sockaddr *src, struct sockaddr *dst,
4534 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4535 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4536 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4537 uint32_t vrf_id, uint16_t port)
4539 struct sctp_association *asoc;
4540 struct mbuf *op_err;
4541 char msg[SCTP_DIAG_INFO_LEN];
4543 int num_chunks = 0; /* number of control chunks processed */
4544 uint32_t chk_length, contiguous;
4546 int abort_no_unlock = 0;
4550 * How big should this be, and should it be alloc'd? Lets try the
4551 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4552 * until we get into jumbo grams and such..
4554 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4556 uint32_t auth_offset = 0, auth_len = 0;
4557 int auth_skipped = 0;
4559 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4563 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4564 iphlen, *offset, length, (void *)stcb);
4567 SCTP_TCB_LOCK_ASSERT(stcb);
4569 /* validate chunk header length... */
4570 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4571 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4572 ntohs(ch->chunk_length));
4577 * validate the verification tag
4579 vtag_in = ntohl(sh->v_tag);
4581 if (ch->chunk_type == SCTP_INITIATION) {
4582 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4583 ntohs(ch->chunk_length), vtag_in);
4585 /* protocol error- silently discard... */
4586 SCTP_STAT_INCR(sctps_badvtag);
4588 SCTP_TCB_UNLOCK(stcb);
4592 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4594 * If there is no stcb, skip the AUTH chunk and process
4595 * later after a stcb is found (to validate the lookup was
4598 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4600 (inp->auth_supported == 1)) {
4601 /* save this chunk for later processing */
4603 auth_offset = *offset;
4604 auth_len = ntohs(ch->chunk_length);
4606 /* (temporarily) move past this chunk */
4607 *offset += SCTP_SIZE32(auth_len);
4608 if (*offset >= length) {
4609 /* no more data left in the mbuf chain */
4613 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4614 sizeof(struct sctp_chunkhdr), chunk_buf);
4621 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4622 goto process_control_chunks;
4625 * first check if it's an ASCONF with an unknown src addr we
4626 * need to look inside to find the association
4628 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4629 struct sctp_chunkhdr *asconf_ch = ch;
4630 uint32_t asconf_offset = 0, asconf_len = 0;
4632 /* inp's refcount may be reduced */
4633 SCTP_INP_INCR_REF(inp);
4635 asconf_offset = *offset;
4637 asconf_len = ntohs(asconf_ch->chunk_length);
4638 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4640 stcb = sctp_findassociation_ep_asconf(m,
4643 sh, &inp, netp, vrf_id);
4646 asconf_offset += SCTP_SIZE32(asconf_len);
4647 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4648 sizeof(struct sctp_chunkhdr), chunk_buf);
4649 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4652 * reduce inp's refcount if not reduced in
4653 * sctp_findassociation_ep_asconf().
4655 SCTP_INP_DECR_REF(inp);
4658 /* now go back and verify any auth chunk to be sure */
4659 if (auth_skipped && (stcb != NULL)) {
4660 struct sctp_auth_chunk *auth;
4662 auth = (struct sctp_auth_chunk *)
4663 sctp_m_getptr(m, auth_offset,
4664 auth_len, chunk_buf);
4667 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4669 /* auth HMAC failed so dump it */
4673 /* remaining chunks are HMAC checked */
4674 stcb->asoc.authenticated = 1;
4679 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4680 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4682 /* no association, so it's out of the blue... */
4683 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4684 mflowtype, mflowid, inp->fibnum,
4690 /* ABORT and SHUTDOWN can use either v_tag... */
4691 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4692 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4693 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4694 /* Take the T-bit always into account. */
4695 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4696 (vtag_in == asoc->my_vtag)) ||
4697 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4698 (asoc->peer_vtag != htonl(0)) &&
4699 (vtag_in == asoc->peer_vtag))) {
4702 /* drop this packet... */
4703 SCTP_STAT_INCR(sctps_badvtag);
4705 SCTP_TCB_UNLOCK(stcb);
4709 } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
4710 if (vtag_in != asoc->my_vtag) {
4712 * this could be a stale SHUTDOWN-ACK or the
4713 * peer never got the SHUTDOWN-COMPLETE and
4714 * is still hung; we have started a new asoc
4715 * but it won't complete until the shutdown
4719 SCTP_TCB_UNLOCK(stcb);
4721 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4722 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4724 sctp_handle_ootb(m, iphlen, *offset, src, dst,
4726 mflowtype, mflowid, fibnum,
4731 /* for all other chunks, vtag must match */
4732 if (vtag_in != asoc->my_vtag) {
4733 /* invalid vtag... */
4734 SCTPDBG(SCTP_DEBUG_INPUT3,
4735 "invalid vtag: %xh, expect %xh\n",
4736 vtag_in, asoc->my_vtag);
4737 SCTP_STAT_INCR(sctps_badvtag);
4739 SCTP_TCB_UNLOCK(stcb);
4745 } /* end if !SCTP_COOKIE_ECHO */
4747 * process all control chunks...
4749 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4750 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4751 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4752 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
4753 /* implied cookie-ack.. we must have lost the ack */
4754 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4758 process_control_chunks:
4759 while (IS_SCTP_CONTROL(ch)) {
4760 /* validate chunk length */
4761 chk_length = ntohs(ch->chunk_length);
4762 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4763 ch->chunk_type, chk_length);
4764 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4765 if (chk_length < sizeof(*ch) ||
4766 (*offset + (int)chk_length) > length) {
4770 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4772 * INIT and INIT-ACK only gets the init ack "header" portion
4773 * only because we don't have to process the peer's COOKIE.
4774 * All others get a complete chunk.
4776 switch (ch->chunk_type) {
4777 case SCTP_INITIATION:
4778 contiguous = sizeof(struct sctp_init_chunk);
4780 case SCTP_INITIATION_ACK:
4781 contiguous = sizeof(struct sctp_init_ack_chunk);
4784 contiguous = min(chk_length, sizeof(chunk_buf));
4787 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4793 SCTP_TCB_UNLOCK(stcb);
4799 /* Save off the last place we got a control from */
4801 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4803 * allow last_control to be NULL if
4804 * ASCONF... ASCONF processing will find the
4807 if ((netp != NULL) && (*netp != NULL))
4808 stcb->asoc.last_control_chunk_from = *netp;
4811 #ifdef SCTP_AUDITING_ENABLED
4812 sctp_audit_log(0xB0, ch->chunk_type);
4815 /* check to see if this chunk required auth, but isn't */
4816 if ((stcb != NULL) &&
4817 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4818 !stcb->asoc.authenticated) {
4819 /* "silently" ignore */
4820 SCTP_STAT_INCR(sctps_recvauthmissing);
4823 switch (ch->chunk_type) {
4824 case SCTP_INITIATION:
4825 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4826 /* The INIT chunk must be the only chunk. */
4827 if ((num_chunks > 1) ||
4828 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4829 /* RFC 4960 requires that no ABORT is sent */
4832 SCTP_TCB_UNLOCK(stcb);
4836 /* Honor our resource limit. */
4837 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4838 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4839 sctp_abort_association(inp, stcb, m, iphlen,
4840 src, dst, sh, op_err,
4846 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4847 (struct sctp_init_chunk *)ch, inp,
4848 stcb, *netp, &abort_no_unlock,
4852 if ((!abort_no_unlock) && (stcb != NULL)) {
4853 SCTP_TCB_UNLOCK(stcb);
4857 case SCTP_PAD_CHUNK:
4859 case SCTP_INITIATION_ACK:
4860 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT_ACK\n");
4861 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4862 /* We are not interested anymore */
4863 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size)) {
4868 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4869 so = SCTP_INP_SO(inp);
4870 atomic_add_int(&stcb->asoc.refcnt, 1);
4871 SCTP_TCB_UNLOCK(stcb);
4872 SCTP_SOCKET_LOCK(so, 1);
4873 SCTP_TCB_LOCK(stcb);
4874 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4876 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4877 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4878 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4879 SCTP_SOCKET_UNLOCK(so, 1);
4885 /* The INIT-ACK chunk must be the only chunk. */
4886 if ((num_chunks > 1) ||
4887 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4891 if ((netp != NULL) && (*netp != NULL)) {
4892 ret = sctp_handle_init_ack(m, iphlen, *offset,
4894 (struct sctp_init_ack_chunk *)ch,
4903 if (abort_no_unlock) {
4907 * Special case, I must call the output routine to
4908 * get the cookie echoed
4910 if ((stcb != NULL) && (ret == 0)) {
4911 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4915 case SCTP_SELECTIVE_ACK:
4916 case SCTP_NR_SELECTIVE_ACK:
4919 uint32_t a_rwnd, cum_ack;
4920 uint16_t num_seg, num_nr_seg, num_dup;
4922 int offset_seg, offset_dup;
4924 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
4925 ch->chunk_type == SCTP_SELECTIVE_ACK ? "SCTP_SACK" : "SCTP_NR_SACK");
4926 SCTP_STAT_INCR(sctps_recvsacks);
4928 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing %s chunk\n",
4929 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK");
4932 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4933 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4934 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4938 if (stcb->asoc.nrsack_supported == 0) {
4941 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4942 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR_SACK chunk, too small\n");
4946 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4948 * If we have sent a shutdown-ack, we will pay no
4949 * attention to a sack sent in to us since
4950 * we don't care anymore.
4954 flags = ch->chunk_flags;
4955 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4956 struct sctp_sack_chunk *sack;
4958 sack = (struct sctp_sack_chunk *)ch;
4959 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4960 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4962 num_dup = ntohs(sack->sack.num_dup_tsns);
4963 a_rwnd = ntohl(sack->sack.a_rwnd);
4964 if (sizeof(struct sctp_sack_chunk) +
4965 num_seg * sizeof(struct sctp_gap_ack_block) +
4966 num_dup * sizeof(uint32_t) != chk_length) {
4967 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4970 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4971 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4973 struct sctp_nr_sack_chunk *nr_sack;
4975 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4976 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4977 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4978 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4979 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4980 a_rwnd = ntohl(nr_sack->nr_sack.a_rwnd);
4981 if (sizeof(struct sctp_nr_sack_chunk) +
4982 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4983 num_dup * sizeof(uint32_t) != chk_length) {
4984 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
4987 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
4988 offset_dup = offset_seg + (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block);
4990 SCTPDBG(SCTP_DEBUG_INPUT3, "%s process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4991 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK",
4992 cum_ack, num_seg, a_rwnd);
4993 stcb->asoc.seen_a_sack_this_pkt = 1;
4994 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4995 (num_seg == 0) && (num_nr_seg == 0) &&
4996 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4997 (stcb->asoc.saw_sack_with_frags == 0) &&
4998 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4999 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
5001 * We have a SIMPLE sack having no
5002 * prior segments and data on sent
5003 * queue to be acked. Use the faster
5004 * path sack processing. We also
5005 * allow window update sacks with no
5006 * missing segments to go this way
5009 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
5010 &abort_now, ecne_seen);
5012 if ((netp != NULL) && (*netp != NULL)) {
5013 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
5014 num_seg, num_nr_seg, num_dup, &abort_now, flags,
5015 cum_ack, a_rwnd, ecne_seen);
5019 /* ABORT signal from sack processing */
5023 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
5024 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
5025 (stcb->asoc.stream_queue_cnt == 0)) {
5026 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
5030 case SCTP_HEARTBEAT_REQUEST:
5031 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
5032 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5033 SCTP_STAT_INCR(sctps_recvheartbeat);
5034 sctp_send_heartbeat_ack(stcb, m, *offset,
5038 case SCTP_HEARTBEAT_ACK:
5039 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT_ACK\n");
5040 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
5045 SCTP_STAT_INCR(sctps_recvheartbeatack);
5046 if ((netp != NULL) && (*netp != NULL)) {
5047 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
5051 case SCTP_ABORT_ASSOCIATION:
5052 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
5055 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5056 if (sctp_handle_abort((struct sctp_abort_chunk *)ch, stcb, *netp)) {
5066 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
5068 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
5072 if ((netp != NULL) && (*netp != NULL)) {
5075 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
5076 stcb, *netp, &abort_flag);
5083 case SCTP_SHUTDOWN_ACK:
5084 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_ACK, stcb %p\n", (void *)stcb);
5085 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5086 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
5091 case SCTP_OPERATION_ERROR:
5092 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP_ERR\n");
5093 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL) &&
5094 sctp_handle_error(ch, stcb, *netp, contiguous) < 0) {
5099 case SCTP_COOKIE_ECHO:
5100 SCTPDBG(SCTP_DEBUG_INPUT3,
5101 "SCTP_COOKIE_ECHO, stcb %p\n", (void *)stcb);
5102 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size > 0)) {
5105 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5106 /* We are not interested anymore */
5109 SCTP_TCB_UNLOCK(stcb);
5116 * First are we accepting? We do this again here
5117 * since it is possible that a previous endpoint WAS
5118 * listening responded to a INIT-ACK and then
5119 * closed. We opened and bound.. and are now no
5122 * XXXGL: notes on checking listen queue length.
5123 * 1) SCTP_IS_LISTENING() doesn't necessarily mean
5124 * SOLISTENING(), because a listening "UDP type"
5125 * socket isn't listening in terms of the socket
5126 * layer. It is a normal data flow socket, that
5127 * can fork off new connections. Thus, we should
5128 * look into sol_qlen only in case we are !UDP.
5129 * 2) Checking sol_qlen in general requires locking
5130 * the socket, and this code lacks that.
5132 if ((stcb == NULL) &&
5133 (!SCTP_IS_LISTENING(inp) ||
5134 (!(inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) &&
5135 inp->sctp_socket->sol_qlen >= inp->sctp_socket->sol_qlimit))) {
5136 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
5137 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
5138 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
5139 sctp_abort_association(inp, stcb, m, iphlen,
5140 src, dst, sh, op_err,
5147 struct mbuf *ret_buf;
5148 struct sctp_inpcb *linp;
5157 SCTP_ASOC_CREATE_LOCK(linp);
5158 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
5159 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
5160 SCTP_ASOC_CREATE_UNLOCK(linp);
5166 struct sctp_tcb *locked_stcb;
5170 sctp_handle_cookie_echo(m, iphlen,
5174 (struct sctp_cookie_echo_chunk *)ch,
5184 if ((locked_stcb != NULL) && (locked_stcb != stcb)) {
5185 SCTP_TCB_UNLOCK(locked_stcb);
5188 SCTP_TCB_LOCK_ASSERT(stcb);
5194 SCTP_ASOC_CREATE_UNLOCK(linp);
5196 if (ret_buf == NULL) {
5198 SCTP_TCB_UNLOCK(stcb);
5200 SCTPDBG(SCTP_DEBUG_INPUT3,
5201 "GAK, null buffer\n");
5205 /* if AUTH skipped, see if it verified... */
5210 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
5212 * Restart the timer if we have
5215 struct sctp_tmit_chunk *chk;
5217 chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
5218 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
5222 case SCTP_COOKIE_ACK:
5223 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE_ACK, stcb %p\n", (void *)stcb);
5224 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
5227 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5228 /* We are not interested anymore */
5229 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
5232 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5233 so = SCTP_INP_SO(inp);
5234 atomic_add_int(&stcb->asoc.refcnt, 1);
5235 SCTP_TCB_UNLOCK(stcb);
5236 SCTP_SOCKET_LOCK(so, 1);
5237 SCTP_TCB_LOCK(stcb);
5238 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5240 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5241 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
5242 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5243 SCTP_SOCKET_UNLOCK(so, 1);
5249 if ((netp != NULL) && (*netp != NULL)) {
5250 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
5254 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_ECHO\n");
5255 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_ecne_chunk))) {
5260 if (stcb->asoc.ecn_supported == 0) {
5263 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, stcb);
5267 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_CWR\n");
5268 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_cwr_chunk))) {
5272 if (stcb->asoc.ecn_supported == 0) {
5275 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5277 case SCTP_SHUTDOWN_COMPLETE:
5278 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_COMPLETE, stcb %p\n", (void *)stcb);
5279 /* must be first and only chunk */
5280 if ((num_chunks > 1) ||
5281 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5285 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5286 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5293 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5295 if (stcb->asoc.asconf_supported == 0) {
5298 sctp_handle_asconf(m, *offset, src,
5299 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5303 case SCTP_ASCONF_ACK:
5304 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF_ACK\n");
5305 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5310 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5311 if (stcb->asoc.asconf_supported == 0) {
5314 /* He's alive so give him credit */
5315 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5316 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5317 stcb->asoc.overall_error_count,
5319 SCTP_FROM_SCTP_INPUT,
5322 stcb->asoc.overall_error_count = 0;
5323 sctp_handle_asconf_ack(m, *offset,
5324 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5325 if (abort_no_unlock)
5329 case SCTP_FORWARD_CUM_TSN:
5330 case SCTP_IFORWARD_CUM_TSN:
5331 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_FWD_TSN\n");
5332 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5341 if (stcb->asoc.prsctp_supported == 0) {
5345 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5346 /* We are not interested anymore */
5347 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5348 so = SCTP_INP_SO(inp);
5349 atomic_add_int(&stcb->asoc.refcnt, 1);
5350 SCTP_TCB_UNLOCK(stcb);
5351 SCTP_SOCKET_LOCK(so, 1);
5352 SCTP_TCB_LOCK(stcb);
5353 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5355 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5356 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5357 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5358 SCTP_SOCKET_UNLOCK(so, 1);
5364 * For sending a SACK this looks like DATA
5367 stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
5368 sctp_handle_forward_tsn(stcb,
5369 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5376 case SCTP_STREAM_RESET:
5377 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5378 if (((stcb == NULL) || (ch == NULL) || (chk_length < sizeof(struct sctp_stream_reset_tsn_req)))) {
5383 if (stcb->asoc.reconfig_supported == 0) {
5386 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5387 /* stop processing */
5392 case SCTP_PACKET_DROPPED:
5393 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5394 /* re-get it all please */
5395 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5401 if ((ch != NULL) && (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5402 if (stcb->asoc.pktdrop_supported == 0) {
5405 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5407 min(chk_length, contiguous));
5410 case SCTP_AUTHENTICATION:
5411 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5413 /* save the first AUTH for later processing */
5414 if (auth_skipped == 0) {
5415 auth_offset = *offset;
5416 auth_len = chk_length;
5419 /* skip this chunk (temporarily) */
5422 if (stcb->asoc.auth_supported == 0) {
5425 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5426 (chk_length > (sizeof(struct sctp_auth_chunk) +
5427 SCTP_AUTH_DIGEST_LEN_MAX))) {
5432 if (got_auth == 1) {
5433 /* skip this chunk... it's already auth'd */
5437 if ((ch == NULL) || sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch,
5439 /* auth HMAC failed so dump the packet */
5443 /* remaining chunks are HMAC checked */
5444 stcb->asoc.authenticated = 1;
5450 /* it's an unknown chunk! */
5451 if ((ch->chunk_type & 0x40) && (stcb != NULL)) {
5452 struct sctp_gen_error_cause *cause;
5455 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
5456 0, M_NOWAIT, 1, MT_DATA);
5457 if (op_err != NULL) {
5458 len = min(SCTP_SIZE32(chk_length), (uint32_t)(length - *offset));
5459 cause = mtod(op_err, struct sctp_gen_error_cause *);
5460 cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5461 cause->length = htons((uint16_t)(len + sizeof(struct sctp_gen_error_cause)));
5462 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5463 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5464 if (SCTP_BUF_NEXT(op_err) != NULL) {
5465 #ifdef SCTP_MBUF_LOGGING
5466 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5467 sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
5470 sctp_queue_op_err(stcb, op_err);
5472 sctp_m_freem(op_err);
5476 if ((ch->chunk_type & 0x80) == 0) {
5477 /* discard this packet */
5480 } /* else skip this bad chunk and continue... */
5482 } /* switch (ch->chunk_type) */
5486 /* get the next chunk */
5487 *offset += SCTP_SIZE32(chk_length);
5488 if (*offset >= length) {
5489 /* no more data left in the mbuf chain */
5492 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5493 sizeof(struct sctp_chunkhdr), chunk_buf);
5500 if ((asconf_cnt > 0) && (stcb != NULL)) {
5501 sctp_send_asconf_ack(stcb);
5508 * common input chunk processing (v4 and v6)
5511 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5512 struct sockaddr *src, struct sockaddr *dst,
5513 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5514 uint8_t compute_crc,
5516 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5517 uint32_t vrf_id, uint16_t port)
5520 int fwd_tsn_seen = 0, data_processed = 0;
5521 struct mbuf *m = *mm, *op_err;
5522 char msg[SCTP_DIAG_INFO_LEN];
5524 int cnt_ctrl_ready = 0;
5525 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5526 struct sctp_tcb *stcb = NULL;
5527 struct sctp_nets *net = NULL;
5529 SCTP_STAT_INCR(sctps_recvdatagrams);
5530 #ifdef SCTP_AUDITING_ENABLED
5531 sctp_audit_log(0xE0, 1);
5532 sctp_auditing(0, inp, stcb, net);
5534 if (compute_crc != 0) {
5535 uint32_t check, calc_check;
5537 check = sh->checksum;
5539 calc_check = sctp_calculate_cksum(m, iphlen);
5540 sh->checksum = check;
5541 if (calc_check != check) {
5542 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5543 calc_check, check, (void *)m, length, iphlen);
5544 stcb = sctp_findassociation_addr(m, offset, src, dst,
5545 sh, ch, &inp, &net, vrf_id);
5546 #if defined(INET) || defined(INET6)
5547 if ((ch->chunk_type != SCTP_INITIATION) &&
5548 (net != NULL) && (net->port != port)) {
5549 if (net->port == 0) {
5550 /* UDP encapsulation turned on. */
5551 net->mtu -= sizeof(struct udphdr);
5552 if (stcb->asoc.smallest_mtu > net->mtu) {
5553 sctp_pathmtu_adjustment(stcb, net->mtu);
5555 } else if (port == 0) {
5556 /* UDP encapsulation turned off. */
5557 net->mtu += sizeof(struct udphdr);
5558 /* XXX Update smallest_mtu */
5564 net->flowtype = mflowtype;
5565 net->flowid = mflowid;
5567 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5568 if ((inp != NULL) && (stcb != NULL)) {
5569 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5570 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5571 } else if ((inp != NULL) && (stcb == NULL)) {
5574 SCTP_STAT_INCR(sctps_badsum);
5575 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5579 /* Destination port of 0 is illegal, based on RFC4960. */
5580 if (sh->dest_port == 0) {
5581 SCTP_STAT_INCR(sctps_hdrops);
5584 stcb = sctp_findassociation_addr(m, offset, src, dst,
5585 sh, ch, &inp, &net, vrf_id);
5586 #if defined(INET) || defined(INET6)
5587 if ((ch->chunk_type != SCTP_INITIATION) &&
5588 (net != NULL) && (net->port != port)) {
5589 if (net->port == 0) {
5590 /* UDP encapsulation turned on. */
5591 net->mtu -= sizeof(struct udphdr);
5592 if (stcb->asoc.smallest_mtu > net->mtu) {
5593 sctp_pathmtu_adjustment(stcb, net->mtu);
5595 } else if (port == 0) {
5596 /* UDP encapsulation turned off. */
5597 net->mtu += sizeof(struct udphdr);
5598 /* XXX Update smallest_mtu */
5604 net->flowtype = mflowtype;
5605 net->flowid = mflowid;
5608 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5609 SCTP_STAT_INCR(sctps_noport);
5610 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5613 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5614 sctp_send_shutdown_complete2(src, dst, sh,
5615 mflowtype, mflowid, fibnum,
5619 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5622 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5623 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5624 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5625 (ch->chunk_type != SCTP_INIT))) {
5626 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5628 sctp_send_abort(m, iphlen, src, dst,
5630 mflowtype, mflowid, fibnum,
5635 } else if (stcb == NULL) {
5638 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5639 (void *)m, iphlen, offset, length, (void *)stcb);
5641 /* always clear this before beginning a packet */
5642 stcb->asoc.authenticated = 0;
5643 stcb->asoc.seen_a_sack_this_pkt = 0;
5644 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5645 (void *)stcb, stcb->asoc.state);
5647 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5648 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5650 * If we hit here, we had a ref count
5651 * up when the assoc was aborted and the
5652 * timer is clearing out the assoc, we should
5653 * NOT respond to any packet.. its OOTB.
5655 SCTP_TCB_UNLOCK(stcb);
5657 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5658 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5659 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5661 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5662 mflowtype, mflowid, inp->fibnum,
5667 if (IS_SCTP_CONTROL(ch)) {
5668 /* process the control portion of the SCTP packet */
5669 /* sa_ignore NO_NULL_CHK */
5670 stcb = sctp_process_control(m, iphlen, &offset, length,
5672 inp, stcb, &net, &fwd_tsn_seen,
5673 mflowtype, mflowid, fibnum,
5677 * This covers us if the cookie-echo was there and
5678 * it changes our INP.
5680 inp = stcb->sctp_ep;
5681 #if defined(INET) || defined(INET6)
5682 if ((ch->chunk_type != SCTP_INITIATION) &&
5683 (net != NULL) && (net->port != port)) {
5684 if (net->port == 0) {
5685 /* UDP encapsulation turned on. */
5686 net->mtu -= sizeof(struct udphdr);
5687 if (stcb->asoc.smallest_mtu > net->mtu) {
5688 sctp_pathmtu_adjustment(stcb, net->mtu);
5690 } else if (port == 0) {
5691 /* UDP encapsulation turned off. */
5692 net->mtu += sizeof(struct udphdr);
5693 /* XXX Update smallest_mtu */
5701 * no control chunks, so pre-process DATA chunks (these
5702 * checks are taken care of by control processing)
5706 * if DATA only packet, and auth is required, then punt...
5707 * can't have authenticated without any AUTH (control)
5710 if ((stcb != NULL) &&
5711 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5712 /* "silently" ignore */
5713 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5714 SCTP_STAT_INCR(sctps_recvauthmissing);
5718 /* out of the blue DATA chunk */
5719 SCTP_PROBE5(receive, NULL, NULL, m, NULL, sh);
5720 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5721 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5723 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5724 mflowtype, mflowid, fibnum,
5728 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5729 /* v_tag mismatch! */
5730 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5731 SCTP_STAT_INCR(sctps_badvtag);
5736 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5739 * no valid TCB for this packet, or we found it's a bad
5740 * packet while processing control, or we're done with this
5741 * packet (done or skip rest of data), so we drop it...
5747 * DATA chunk processing
5749 /* plow through the data chunks while length > offset */
5752 * Rest should be DATA only. Check authentication state if AUTH for
5755 if ((length > offset) &&
5757 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5758 !stcb->asoc.authenticated) {
5759 /* "silently" ignore */
5760 SCTP_STAT_INCR(sctps_recvauthmissing);
5761 SCTPDBG(SCTP_DEBUG_AUTH1,
5762 "Data chunk requires AUTH, skipped\n");
5765 if (length > offset) {
5769 * First check to make sure our state is correct. We would
5770 * not get here unless we really did have a tag, so we don't
5771 * abort if this happens, just dump the chunk silently.
5773 switch (SCTP_GET_STATE(stcb)) {
5774 case SCTP_STATE_COOKIE_ECHOED:
5776 * we consider data with valid tags in this state
5777 * shows us the cookie-ack was lost. Imply it was
5780 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5782 case SCTP_STATE_COOKIE_WAIT:
5784 * We consider OOTB any data sent during asoc setup.
5786 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5787 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5789 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5790 mflowtype, mflowid, inp->fibnum,
5793 /* sa_ignore NOTREACHED */
5795 case SCTP_STATE_EMPTY: /* should not happen */
5796 case SCTP_STATE_INUSE: /* should not happen */
5797 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5798 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5801 /* sa_ignore NOTREACHED */
5803 case SCTP_STATE_OPEN:
5804 case SCTP_STATE_SHUTDOWN_SENT:
5807 /* plow through the data chunks while length > offset */
5808 retval = sctp_process_data(mm, iphlen, &offset, length,
5809 inp, stcb, net, &high_tsn);
5812 * The association aborted, NO UNLOCK needed since
5813 * the association is destroyed.
5820 * Anything important needs to have been m_copy'ed in
5825 /* take care of ecn */
5826 if ((data_processed == 1) &&
5827 (stcb->asoc.ecn_supported == 1) &&
5828 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5829 /* Yep, we need to add a ECNE */
5830 sctp_send_ecn_echo(stcb, net, high_tsn);
5833 if ((data_processed == 0) && (fwd_tsn_seen)) {
5835 uint32_t highest_tsn;
5837 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5838 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5840 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5842 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5843 stcb->asoc.send_sack = 1;
5844 sctp_sack_check(stcb, was_a_gap);
5845 } else if (fwd_tsn_seen) {
5846 stcb->asoc.send_sack = 1;
5848 /* trigger send of any chunks in queue... */
5850 #ifdef SCTP_AUDITING_ENABLED
5851 sctp_audit_log(0xE0, 2);
5852 sctp_auditing(1, inp, stcb, net);
5854 SCTPDBG(SCTP_DEBUG_INPUT1,
5855 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5856 stcb->asoc.peers_rwnd,
5857 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5858 stcb->asoc.total_flight);
5859 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5860 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5861 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5863 if (!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue) ||
5865 stcb->asoc.trigger_reset ||
5867 (stcb->asoc.peers_rwnd > 0 ||
5868 (stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) {
5869 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5870 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5871 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5873 #ifdef SCTP_AUDITING_ENABLED
5874 sctp_audit_log(0xE0, 3);
5875 sctp_auditing(2, inp, stcb, net);
5879 SCTP_TCB_UNLOCK(stcb);
5881 if (inp_decr != NULL) {
5882 /* reduce ref-count */
5883 SCTP_INP_WLOCK(inp_decr);
5884 SCTP_INP_DECR_REF(inp_decr);
5885 SCTP_INP_WUNLOCK(inp_decr);
5892 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5896 uint32_t vrf_id = 0;
5898 struct sockaddr_in src, dst;
5901 struct sctp_chunkhdr *ch;
5903 uint8_t compute_crc;
5909 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
5910 SCTP_RELEASE_PKT(i_pak);
5913 m = SCTP_HEADER_TO_CHAIN(i_pak);
5914 #ifdef SCTP_MBUF_LOGGING
5915 /* Log in any input mbufs */
5916 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5917 sctp_log_mbc(m, SCTP_MBUF_INPUT);
5920 #ifdef SCTP_PACKET_LOGGING
5921 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
5925 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
5926 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
5928 if_name(m->m_pkthdr.rcvif),
5929 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
5930 mflowid = m->m_pkthdr.flowid;
5931 mflowtype = M_HASHTYPE_GET(m);
5932 fibnum = M_GETFIB(m);
5933 SCTP_STAT_INCR(sctps_recvpackets);
5934 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
5935 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
5936 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5937 if (SCTP_BUF_LEN(m) < offset) {
5938 if ((m = m_pullup(m, offset)) == NULL) {
5939 SCTP_STAT_INCR(sctps_hdrops);
5943 ip = mtod(m, struct ip *);
5944 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
5945 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
5946 offset -= sizeof(struct sctp_chunkhdr);
5947 memset(&src, 0, sizeof(struct sockaddr_in));
5948 src.sin_family = AF_INET;
5949 src.sin_len = sizeof(struct sockaddr_in);
5950 src.sin_port = sh->src_port;
5951 src.sin_addr = ip->ip_src;
5952 memset(&dst, 0, sizeof(struct sockaddr_in));
5953 dst.sin_family = AF_INET;
5954 dst.sin_len = sizeof(struct sockaddr_in);
5955 dst.sin_port = sh->dest_port;
5956 dst.sin_addr = ip->ip_dst;
5957 length = ntohs(ip->ip_len);
5958 /* Validate mbuf chain length with IP payload length. */
5959 if (SCTP_HEADER_LEN(m) != length) {
5960 SCTPDBG(SCTP_DEBUG_INPUT1,
5961 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
5962 SCTP_STAT_INCR(sctps_hdrops);
5965 /* SCTP does not allow broadcasts or multicasts */
5966 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
5969 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
5972 ecn_bits = ip->ip_tos;
5973 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
5974 SCTP_STAT_INCR(sctps_recvhwcrc);
5977 SCTP_STAT_INCR(sctps_recvswcrc);
5980 sctp_common_input_processing(&m, iphlen, offset, length,
5981 (struct sockaddr *)&src,
5982 (struct sockaddr *)&dst,
5986 mflowtype, mflowid, fibnum,
5995 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5996 extern int *sctp_cpuarry;
6000 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
6007 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6013 uint32_t flowid, tag;
6015 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
6016 flowid = m->m_pkthdr.flowid;
6019 * No flow id built by lower layers fix it so we
6022 offset = off + sizeof(struct sctphdr);
6023 if (SCTP_BUF_LEN(m) < offset) {
6024 if ((m = m_pullup(m, offset)) == NULL) {
6025 SCTP_STAT_INCR(sctps_hdrops);
6026 return (IPPROTO_DONE);
6029 ip = mtod(m, struct ip *);
6030 sh = (struct sctphdr *)((caddr_t)ip + off);
6031 tag = htonl(sh->v_tag);
6032 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
6033 m->m_pkthdr.flowid = flowid;
6034 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE_HASH);
6036 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
6037 sctp_queue_to_mcore(m, off, cpu_to_use);
6038 return (IPPROTO_DONE);
6041 sctp_input_with_port(m, off, 0);
6042 return (IPPROTO_DONE);