2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <netinet/sctp_os.h>
39 #include <netinet/sctp_var.h>
40 #include <netinet/sctp_sysctl.h>
41 #include <netinet/sctp_pcb.h>
42 #include <netinet/sctp_header.h>
43 #include <netinet/sctputil.h>
44 #include <netinet/sctp_output.h>
45 #include <netinet/sctp_input.h>
46 #include <netinet/sctp_auth.h>
47 #include <netinet/sctp_indata.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctp_bsd_addr.h>
50 #include <netinet/sctp_timer.h>
51 #include <netinet/sctp_crc32.h>
52 #include <netinet/sctp_kdtrace.h>
53 #if defined(INET) || defined(INET6)
54 #include <netinet/udp.h>
61 sctp_stop_all_cookie_timers(struct sctp_tcb *stcb)
63 struct sctp_nets *net;
66 * This now not only stops all cookie timers it also stops any INIT
67 * timers as well. This will make sure that the timers are stopped
68 * in all collision cases.
70 SCTP_TCB_LOCK_ASSERT(stcb);
71 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
72 if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) {
73 sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE,
76 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1);
77 } else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) {
78 sctp_timer_stop(SCTP_TIMER_TYPE_INIT,
81 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2);
88 sctp_handle_init(struct mbuf *m, int iphlen, int offset,
89 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
90 struct sctp_init_chunk *cp, struct sctp_inpcb *inp,
91 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_no_unlock,
92 uint8_t mflowtype, uint32_t mflowid,
93 uint32_t vrf_id, uint16_t port)
95 struct sctp_init *init;
98 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_init: handling INIT tcb:%p\n",
103 /* validate length */
104 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_chunk)) {
105 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
106 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
110 *abort_no_unlock = 1;
113 /* validate parameters */
115 if (init->initiate_tag == 0) {
116 /* protocol error... send abort */
117 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
118 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
122 *abort_no_unlock = 1;
125 if (ntohl(init->a_rwnd) < SCTP_MIN_RWND) {
126 /* invalid parameter... send abort */
127 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
128 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
132 *abort_no_unlock = 1;
135 if (init->num_inbound_streams == 0) {
136 /* protocol error... send abort */
137 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
138 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
142 *abort_no_unlock = 1;
145 if (init->num_outbound_streams == 0) {
146 /* protocol error... send abort */
147 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
148 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
152 *abort_no_unlock = 1;
155 if (sctp_validate_init_auth_params(m, offset + sizeof(*cp),
156 offset + ntohs(cp->ch.chunk_length))) {
157 /* auth parameter(s) error... send abort */
158 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
159 "Problem with AUTH parameters");
160 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
164 *abort_no_unlock = 1;
167 /* We are only accepting if we have a listening socket. */
168 if ((stcb == NULL) &&
169 ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
170 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
171 (!SCTP_IS_LISTENING(inp)))) {
173 * FIX ME ?? What about TCP model and we have a
174 * match/restart case? Actually no fix is needed. the lookup
175 * will always find the existing assoc so stcb would not be
176 * NULL. It may be questionable to do this since we COULD
177 * just send back the INIT-ACK and hope that the app did
178 * accept()'s by the time the COOKIE was sent. But there is
179 * a price to pay for COOKIE generation and I don't want to
180 * pay it on the chance that the app will actually do some
181 * accepts(). The App just looses and should NOT be in this
184 if (SCTP_BASE_SYSCTL(sctp_blackhole) == 0) {
185 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
187 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
188 mflowtype, mflowid, inp->fibnum,
193 if ((stcb != NULL) &&
194 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT)) {
195 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending SHUTDOWN-ACK\n");
196 sctp_send_shutdown_ack(stcb, NULL);
197 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
199 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending INIT-ACK\n");
200 sctp_send_initiate_ack(inp, stcb, net, m, iphlen, offset,
207 SCTP_INP_RUNLOCK(inp);
212 * process peer "INIT/INIT-ACK" chunk returns value < 0 on error
216 sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked
217 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
224 struct sctp_stream_queue_pending *sp;
225 struct sctp_association *asoc;
228 * This function returns if any stream has true unsent data on it.
229 * Note that as it looks through it will clean up any places that
230 * have old data that has been sent but left at top of stream queue.
234 SCTP_TCB_SEND_LOCK(stcb);
235 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
236 /* Check to see if some data queued */
237 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
238 /* sa_ignore FREED_MEMORY */
239 sp = TAILQ_FIRST(&stcb->asoc.strmout[i].outqueue);
243 if ((sp->msg_is_complete) &&
245 (sp->sender_all_done)) {
247 * We are doing differed cleanup. Last time
248 * through when we took all the data the
249 * sender_all_done was not set.
251 if (sp->put_last_out == 0) {
252 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
253 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
259 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
260 TAILQ_REMOVE(&stcb->asoc.strmout[i].outqueue, sp, next);
261 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, &asoc->strmout[i], sp, 1);
263 sctp_free_remote_addr(sp->net);
267 sctp_m_freem(sp->data);
270 sctp_free_a_strmoq(stcb, sp, so_locked);
271 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
277 if (unsent_data > 0) {
282 SCTP_TCB_SEND_UNLOCK(stcb);
283 return (unsent_data);
287 sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
289 struct sctp_init *init;
290 struct sctp_association *asoc;
291 struct sctp_nets *lnet;
296 /* save off parameters */
297 asoc->peer_vtag = ntohl(init->initiate_tag);
298 asoc->peers_rwnd = ntohl(init->a_rwnd);
300 asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1;
302 if (!TAILQ_EMPTY(&asoc->nets)) {
303 /* update any ssthresh's that may have a default */
304 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
305 lnet->ssthresh = asoc->peers_rwnd;
306 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
307 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION);
312 SCTP_TCB_SEND_LOCK(stcb);
313 if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) {
315 struct sctp_stream_out *outs;
316 struct sctp_stream_queue_pending *sp, *nsp;
317 struct sctp_tmit_chunk *chk, *nchk;
319 /* abandon the upper streams */
320 newcnt = ntohs(init->num_inbound_streams);
321 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
322 if (chk->rec.data.sid >= newcnt) {
323 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
324 asoc->send_queue_cnt--;
325 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
326 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
329 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
332 if (chk->data != NULL) {
333 sctp_free_bufspace(stcb, asoc, chk, 1);
334 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
335 0, chk, SCTP_SO_NOT_LOCKED);
337 sctp_m_freem(chk->data);
341 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
342 /* sa_ignore FREED_MEMORY */
346 for (i = newcnt; i < asoc->pre_open_streams; i++) {
347 outs = &asoc->strmout[i];
348 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
349 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
350 TAILQ_REMOVE(&outs->outqueue, sp, next);
351 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
352 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL,
353 stcb, 0, sp, SCTP_SO_NOT_LOCKED);
355 sctp_m_freem(sp->data);
359 sctp_free_remote_addr(sp->net);
363 sctp_free_a_strmoq(stcb, sp, SCTP_SO_NOT_LOCKED);
364 /* sa_ignore FREED_MEMORY */
366 outs->state = SCTP_STREAM_CLOSED;
369 /* cut back the count */
370 asoc->pre_open_streams = newcnt;
372 SCTP_TCB_SEND_UNLOCK(stcb);
373 asoc->streamoutcnt = asoc->pre_open_streams;
375 for (i = 0; i < asoc->streamoutcnt; i++) {
376 asoc->strmout[i].state = SCTP_STREAM_OPEN;
379 /* EY - nr_sack: initialize highest tsn in nr_mapping_array */
380 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
381 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
382 sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
384 /* This is the next one we expect */
385 asoc->str_reset_seq_in = asoc->asconf_seq_in + 1;
387 asoc->mapping_array_base_tsn = ntohl(init->initial_tsn);
388 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->asconf_seq_in;
390 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
391 /* open the requested streams */
393 if (asoc->strmin != NULL) {
394 /* Free the old ones */
395 for (i = 0; i < asoc->streamincnt; i++) {
396 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
397 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
399 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
401 if (asoc->max_inbound_streams > ntohs(init->num_outbound_streams)) {
402 asoc->streamincnt = ntohs(init->num_outbound_streams);
404 asoc->streamincnt = asoc->max_inbound_streams;
406 SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt *
407 sizeof(struct sctp_stream_in), SCTP_M_STRMI);
408 if (asoc->strmin == NULL) {
409 /* we didn't get memory for the streams! */
410 SCTPDBG(SCTP_DEBUG_INPUT2, "process_init: couldn't get memory for the streams!\n");
413 for (i = 0; i < asoc->streamincnt; i++) {
414 asoc->strmin[i].sid = i;
415 asoc->strmin[i].last_mid_delivered = 0xffffffff;
416 TAILQ_INIT(&asoc->strmin[i].inqueue);
417 TAILQ_INIT(&asoc->strmin[i].uno_inqueue);
418 asoc->strmin[i].pd_api_started = 0;
419 asoc->strmin[i].delivery_started = 0;
422 * load_address_from_init will put the addresses into the
423 * association when the COOKIE is processed or the INIT-ACK is
424 * processed. Both types of COOKIE's existing and new call this
425 * routine. It will remove addresses that are no longer in the
426 * association (for the restarting case where addresses are
427 * removed). Up front when the INIT arrives we will discard it if it
428 * is a restart and new addresses have been added.
430 /* sa_ignore MEMLEAK */
435 * INIT-ACK message processing/consumption returns value < 0 on error
438 sctp_process_init_ack(struct mbuf *m, int iphlen, int offset,
439 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
440 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
441 struct sctp_nets *net, int *abort_no_unlock,
442 uint8_t mflowtype, uint32_t mflowid,
445 struct sctp_association *asoc;
447 int retval, abort_flag, cookie_found;
449 int nat_friendly = 0;
451 /* First verify that we have no illegal param's */
455 op_err = sctp_arethere_unrecognized_parameters(m,
456 (offset + sizeof(struct sctp_init_chunk)),
457 &abort_flag, (struct sctp_chunkhdr *)cp,
458 &nat_friendly, &cookie_found);
460 /* Send an abort and notify peer */
461 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
462 *abort_no_unlock = 1;
468 /* Only report the missing cookie parameter */
469 if (op_err != NULL) {
470 sctp_m_freem(op_err);
472 len = (uint16_t)(sizeof(struct sctp_error_missing_param) + sizeof(uint16_t));
473 /* We abort with an error of missing mandatory param */
474 op_err = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
475 if (op_err != NULL) {
476 struct sctp_error_missing_param *cause;
478 SCTP_BUF_LEN(op_err) = len;
479 cause = mtod(op_err, struct sctp_error_missing_param *);
480 /* Subtract the reserved param */
481 cause->cause.code = htons(SCTP_CAUSE_MISSING_PARAM);
482 cause->cause.length = htons(len);
483 cause->num_missing_params = htonl(1);
484 cause->type[0] = htons(SCTP_STATE_COOKIE);
486 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
487 src, dst, sh, op_err,
490 *abort_no_unlock = 1;
494 asoc->peer_supports_nat = (uint8_t)nat_friendly;
495 /* process the peer's parameters in the INIT-ACK */
496 retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb);
498 if (op_err != NULL) {
499 sctp_m_freem(op_err);
503 initack_limit = offset + ntohs(cp->ch.chunk_length);
504 /* load all addresses */
505 if ((retval = sctp_load_addresses_from_init(stcb, m,
506 (offset + sizeof(struct sctp_init_chunk)), initack_limit,
507 src, dst, NULL, stcb->asoc.port))) {
508 if (op_err != NULL) {
509 sctp_m_freem(op_err);
511 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
512 "Problem with address parameters");
513 SCTPDBG(SCTP_DEBUG_INPUT1,
514 "Load addresses from INIT causes an abort %d\n",
516 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
517 src, dst, sh, op_err,
520 *abort_no_unlock = 1;
523 /* if the peer doesn't support asconf, flush the asconf queue */
524 if (asoc->asconf_supported == 0) {
525 struct sctp_asconf_addr *param, *nparam;
527 TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
528 TAILQ_REMOVE(&asoc->asconf_queue, param, next);
529 SCTP_FREE(param, SCTP_M_ASC_ADDR);
533 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
534 stcb->asoc.local_hmacs);
536 sctp_queue_op_err(stcb, op_err);
537 /* queuing will steal away the mbuf chain to the out queue */
540 /* extract the cookie and queue it to "echo" it back... */
541 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
542 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
543 stcb->asoc.overall_error_count,
545 SCTP_FROM_SCTP_INPUT,
548 stcb->asoc.overall_error_count = 0;
549 net->error_count = 0;
552 * Cancel the INIT timer, We do this first before queueing the
553 * cookie. We always cancel at the primary to assue that we are
554 * canceling the timer started by the INIT which always goes to the
557 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
558 asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
560 /* calculate the RTO */
561 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
562 SCTP_RTT_FROM_NON_DATA);
563 retval = sctp_send_cookie_echo(m, offset, initack_limit, stcb, net);
568 sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp,
569 struct sctp_tcb *stcb, struct sctp_nets *net)
571 union sctp_sockstore store;
572 struct sctp_nets *r_net, *f_net;
575 uint16_t old_error_counter;
577 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) {
582 memset(&store, 0, sizeof(store));
583 switch (cp->heartbeat.hb_info.addr_family) {
586 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
587 store.sin.sin_family = cp->heartbeat.hb_info.addr_family;
588 store.sin.sin_len = cp->heartbeat.hb_info.addr_len;
589 store.sin.sin_port = stcb->rport;
590 memcpy(&store.sin.sin_addr, cp->heartbeat.hb_info.address,
591 sizeof(store.sin.sin_addr));
599 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
600 store.sin6.sin6_family = cp->heartbeat.hb_info.addr_family;
601 store.sin6.sin6_len = cp->heartbeat.hb_info.addr_len;
602 store.sin6.sin6_port = stcb->rport;
603 memcpy(&store.sin6.sin6_addr, cp->heartbeat.hb_info.address, sizeof(struct in6_addr));
612 r_net = sctp_findnet(stcb, &store.sa);
614 SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
617 if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
618 (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
619 (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
621 * If the its a HB and it's random value is correct when can
622 * confirm the destination.
624 r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
625 if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
626 stcb->asoc.primary_destination = r_net;
627 r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
628 f_net = TAILQ_FIRST(&stcb->asoc.nets);
629 if (f_net != r_net) {
631 * first one on the list is NOT the primary
632 * sctp_cmpaddr() is much more efficient if
633 * the primary is the first on the list,
636 TAILQ_REMOVE(&stcb->asoc.nets, r_net, sctp_next);
637 TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
641 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
642 stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
643 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
644 r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
645 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
647 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
648 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
649 stcb->asoc.overall_error_count,
651 SCTP_FROM_SCTP_INPUT,
654 stcb->asoc.overall_error_count = 0;
655 old_error_counter = r_net->error_count;
656 r_net->error_count = 0;
657 r_net->hb_responded = 1;
658 tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
659 tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
660 /* Now lets do a RTO with this */
661 sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv,
662 SCTP_RTT_FROM_NON_DATA);
663 if (!(r_net->dest_state & SCTP_ADDR_REACHABLE)) {
664 r_net->dest_state |= SCTP_ADDR_REACHABLE;
665 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
666 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
668 if (r_net->dest_state & SCTP_ADDR_PF) {
669 r_net->dest_state &= ~SCTP_ADDR_PF;
670 stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
672 if (old_error_counter > 0) {
673 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
674 stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5);
675 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
677 if (r_net == stcb->asoc.primary_destination) {
678 if (stcb->asoc.alternate) {
679 /* release the alternate, primary is good */
680 sctp_free_remote_addr(stcb->asoc.alternate);
681 stcb->asoc.alternate = NULL;
684 /* Mobility adaptation */
686 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
687 SCTP_MOBILITY_BASE) ||
688 sctp_is_mobility_feature_on(stcb->sctp_ep,
689 SCTP_MOBILITY_FASTHANDOFF)) &&
690 sctp_is_mobility_feature_on(stcb->sctp_ep,
691 SCTP_MOBILITY_PRIM_DELETED)) {
693 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
694 stcb->sctp_ep, stcb, NULL,
695 SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
696 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
697 SCTP_MOBILITY_FASTHANDOFF)) {
698 sctp_assoc_immediate_retrans(stcb,
699 stcb->asoc.primary_destination);
701 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
702 SCTP_MOBILITY_BASE)) {
703 sctp_move_chunks_from_net(stcb,
704 stcb->asoc.deleted_primary);
706 sctp_delete_prim_timer(stcb->sctp_ep, stcb,
707 stcb->asoc.deleted_primary);
713 sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
716 * Return 0 means we want you to proceed with the abort non-zero
717 * means no abort processing.
720 struct sctpasochead *head;
722 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
723 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
724 new_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
725 atomic_add_int(&stcb->asoc.refcnt, 1);
726 SCTP_TCB_UNLOCK(stcb);
727 SCTP_INP_INFO_WLOCK();
729 atomic_subtract_int(&stcb->asoc.refcnt, 1);
733 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) {
734 /* generate a new vtag and send init */
735 LIST_REMOVE(stcb, sctp_asocs);
736 stcb->asoc.my_vtag = new_vtag;
737 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
739 * put it in the bucket in the vtag hash of assoc's for the
742 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
743 SCTP_INP_INFO_WUNLOCK();
744 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
748 * treat like a case where the cookie expired i.e.: - dump
749 * current cookie. - generate a new vtag. - resend init.
751 /* generate a new vtag and send init */
752 LIST_REMOVE(stcb, sctp_asocs);
753 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
754 sctp_stop_all_cookie_timers(stcb);
755 sctp_toss_old_cookies(stcb, &stcb->asoc);
756 stcb->asoc.my_vtag = new_vtag;
757 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
759 * put it in the bucket in the vtag hash of assoc's for the
762 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
763 SCTP_INP_INFO_WUNLOCK();
764 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
771 sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
772 struct sctp_nets *net)
775 * return 0 means we want you to proceed with the abort non-zero
776 * means no abort processing
778 if (stcb->asoc.auth_supported == 0) {
779 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
782 sctp_asconf_send_nat_state_update(stcb, net);
787 /* Returns 1 if the stcb was aborted, 0 otherwise */
789 sctp_handle_abort(struct sctp_abort_chunk *abort,
790 struct sctp_tcb *stcb, struct sctp_nets *net)
792 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
798 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
802 len = ntohs(abort->ch.chunk_length);
803 if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_error_cause)) {
805 * Need to check the cause codes for our two magic nat
806 * aborts which don't kill the assoc necessarily.
808 struct sctp_error_cause *cause;
810 cause = (struct sctp_error_cause *)(abort + 1);
811 error = ntohs(cause->code);
812 if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
813 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
814 abort->ch.chunk_flags);
815 if (sctp_handle_nat_colliding_state(stcb)) {
818 } else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
819 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
820 abort->ch.chunk_flags);
821 if (sctp_handle_nat_missing_state(stcb, net)) {
828 /* stop any receive timers */
829 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, net,
830 SCTP_FROM_SCTP_INPUT + SCTP_LOC_7);
831 /* notify user of the abort and clean up... */
832 sctp_abort_notification(stcb, 1, error, abort, SCTP_SO_NOT_LOCKED);
834 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
835 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
836 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
837 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
839 #ifdef SCTP_ASOCLOG_OF_TSNS
840 sctp_print_out_track_log(stcb);
842 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
843 so = SCTP_INP_SO(stcb->sctp_ep);
844 atomic_add_int(&stcb->asoc.refcnt, 1);
845 SCTP_TCB_UNLOCK(stcb);
846 SCTP_SOCKET_LOCK(so, 1);
848 atomic_subtract_int(&stcb->asoc.refcnt, 1);
850 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_WAS_ABORTED);
851 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
852 SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
853 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
854 SCTP_SOCKET_UNLOCK(so, 1);
856 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
861 sctp_start_net_timers(struct sctp_tcb *stcb)
863 uint32_t cnt_hb_sent;
864 struct sctp_nets *net;
867 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
869 * For each network start: 1) A pmtu timer. 2) A HB timer 3)
870 * If the dest in unconfirmed send a hb as well if under
871 * max_hb_burst have been sent.
873 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
874 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
875 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
876 (cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
877 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
882 sctp_chunk_output(stcb->sctp_ep, stcb,
883 SCTP_OUTPUT_FROM_COOKIE_ACK,
890 sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
891 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
893 struct sctp_association *asoc;
894 int some_on_streamwheel;
896 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
900 SCTPDBG(SCTP_DEBUG_INPUT2,
901 "sctp_handle_shutdown: handling SHUTDOWN\n");
905 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
906 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
909 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
910 /* Shutdown NOT the expected size */
913 old_state = SCTP_GET_STATE(stcb);
914 sctp_update_acked(stcb, cp, abort_flag);
918 if (asoc->control_pdapi) {
920 * With a normal shutdown we assume the end of last record.
922 SCTP_INP_READ_LOCK(stcb->sctp_ep);
923 if (asoc->control_pdapi->on_strm_q) {
924 struct sctp_stream_in *strm;
926 strm = &asoc->strmin[asoc->control_pdapi->sinfo_stream];
927 if (asoc->control_pdapi->on_strm_q == SCTP_ON_UNORDERED) {
929 TAILQ_REMOVE(&strm->uno_inqueue, asoc->control_pdapi, next_instrm);
930 asoc->control_pdapi->on_strm_q = 0;
931 } else if (asoc->control_pdapi->on_strm_q == SCTP_ON_ORDERED) {
933 TAILQ_REMOVE(&strm->inqueue, asoc->control_pdapi, next_instrm);
934 asoc->control_pdapi->on_strm_q = 0;
937 panic("Unknown state on ctrl:%p on_strm_q:%d",
939 asoc->control_pdapi->on_strm_q);
943 asoc->control_pdapi->end_added = 1;
944 asoc->control_pdapi->pdapi_aborted = 1;
945 asoc->control_pdapi = NULL;
946 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
947 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
948 so = SCTP_INP_SO(stcb->sctp_ep);
949 atomic_add_int(&stcb->asoc.refcnt, 1);
950 SCTP_TCB_UNLOCK(stcb);
951 SCTP_SOCKET_LOCK(so, 1);
953 atomic_subtract_int(&stcb->asoc.refcnt, 1);
954 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
955 /* assoc was freed while we were unlocked */
956 SCTP_SOCKET_UNLOCK(so, 1);
960 if (stcb->sctp_socket) {
961 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
963 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
964 SCTP_SOCKET_UNLOCK(so, 1);
967 /* goto SHUTDOWN_RECEIVED state to block new requests */
968 if (stcb->sctp_socket) {
969 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
970 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
971 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
972 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_RECEIVED);
974 * notify upper layer that peer has initiated a
977 sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
980 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
983 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) {
985 * stop the shutdown timer, since we WILL move to
988 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
989 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
991 /* Now is there unsent data on a stream somewhere? */
992 some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
994 if (!TAILQ_EMPTY(&asoc->send_queue) ||
995 !TAILQ_EMPTY(&asoc->sent_queue) ||
996 some_on_streamwheel) {
997 /* By returning we will push more data out */
1000 /* no outstanding data to send, so move on... */
1001 /* send SHUTDOWN-ACK */
1002 /* move to SHUTDOWN-ACK-SENT state */
1003 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
1004 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
1005 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
1007 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
1008 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_ACK_SENT);
1009 sctp_stop_timers_for_shutdown(stcb);
1010 sctp_send_shutdown_ack(stcb, net);
1011 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK,
1012 stcb->sctp_ep, stcb, net);
1013 } else if (old_state == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1014 sctp_send_shutdown_ack(stcb, net);
1020 sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
1021 struct sctp_tcb *stcb,
1022 struct sctp_nets *net)
1024 struct sctp_association *asoc;
1025 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1028 so = SCTP_INP_SO(stcb->sctp_ep);
1030 SCTPDBG(SCTP_DEBUG_INPUT2,
1031 "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
1036 /* process according to association state */
1037 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
1038 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1039 /* unexpected SHUTDOWN-ACK... do OOTB handling... */
1040 sctp_send_shutdown_complete(stcb, net, 1);
1041 SCTP_TCB_UNLOCK(stcb);
1044 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
1045 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
1046 /* unexpected SHUTDOWN-ACK... so ignore... */
1047 SCTP_TCB_UNLOCK(stcb);
1050 if (asoc->control_pdapi) {
1052 * With a normal shutdown we assume the end of last record.
1054 SCTP_INP_READ_LOCK(stcb->sctp_ep);
1055 asoc->control_pdapi->end_added = 1;
1056 asoc->control_pdapi->pdapi_aborted = 1;
1057 asoc->control_pdapi = NULL;
1058 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
1059 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1060 atomic_add_int(&stcb->asoc.refcnt, 1);
1061 SCTP_TCB_UNLOCK(stcb);
1062 SCTP_SOCKET_LOCK(so, 1);
1063 SCTP_TCB_LOCK(stcb);
1064 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1065 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1066 /* assoc was freed while we were unlocked */
1067 SCTP_SOCKET_UNLOCK(so, 1);
1071 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
1072 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1073 SCTP_SOCKET_UNLOCK(so, 1);
1077 if (!TAILQ_EMPTY(&asoc->send_queue) ||
1078 !TAILQ_EMPTY(&asoc->sent_queue) ||
1079 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
1080 panic("Queues are not empty when handling SHUTDOWN-ACK");
1083 /* stop the timer */
1084 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net,
1085 SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
1086 /* send SHUTDOWN-COMPLETE */
1087 sctp_send_shutdown_complete(stcb, net, 0);
1088 /* notify upper layer protocol */
1089 if (stcb->sctp_socket) {
1090 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1091 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1092 stcb->sctp_socket->so_snd.sb_cc = 0;
1094 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
1096 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
1097 /* free the TCB but first save off the ep */
1098 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1099 atomic_add_int(&stcb->asoc.refcnt, 1);
1100 SCTP_TCB_UNLOCK(stcb);
1101 SCTP_SOCKET_LOCK(so, 1);
1102 SCTP_TCB_LOCK(stcb);
1103 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1105 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1106 SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
1107 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1108 SCTP_SOCKET_UNLOCK(so, 1);
1113 sctp_process_unrecog_chunk(struct sctp_tcb *stcb, uint8_t chunk_type,
1114 struct sctp_nets *net)
1116 switch (chunk_type) {
1117 case SCTP_ASCONF_ACK:
1119 sctp_asconf_cleanup(stcb, net);
1121 case SCTP_IFORWARD_CUM_TSN:
1122 case SCTP_FORWARD_CUM_TSN:
1123 stcb->asoc.prsctp_supported = 0;
1126 SCTPDBG(SCTP_DEBUG_INPUT2,
1127 "Peer does not support chunk type %d (0x%x).\n",
1128 chunk_type, chunk_type);
1134 * Skip past the param header and then we will find the param that caused the
1135 * problem. There are a number of param's in a ASCONF OR the prsctp param
1136 * these will turn of specific features.
1137 * XXX: Is this the right thing to do?
1140 sctp_process_unrecog_param(struct sctp_tcb *stcb, uint16_t parameter_type)
1142 switch (parameter_type) {
1144 case SCTP_PRSCTP_SUPPORTED:
1145 stcb->asoc.prsctp_supported = 0;
1147 case SCTP_SUPPORTED_CHUNK_EXT:
1149 /* draft-ietf-tsvwg-addip-sctp */
1150 case SCTP_HAS_NAT_SUPPORT:
1151 stcb->asoc.peer_supports_nat = 0;
1153 case SCTP_ADD_IP_ADDRESS:
1154 case SCTP_DEL_IP_ADDRESS:
1155 case SCTP_SET_PRIM_ADDR:
1156 stcb->asoc.asconf_supported = 0;
1158 case SCTP_SUCCESS_REPORT:
1159 case SCTP_ERROR_CAUSE_IND:
1160 SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
1161 SCTPDBG(SCTP_DEBUG_INPUT2,
1162 "Turning off ASCONF to this strange peer\n");
1163 stcb->asoc.asconf_supported = 0;
1166 SCTPDBG(SCTP_DEBUG_INPUT2,
1167 "Peer does not support param type %d (0x%x)??\n",
1168 parameter_type, parameter_type);
1174 sctp_handle_error(struct sctp_chunkhdr *ch,
1175 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
1177 struct sctp_error_cause *cause;
1178 struct sctp_association *asoc;
1179 uint32_t remaining_length, adjust;
1180 uint16_t code, cause_code, cause_length;
1181 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1185 /* parse through all of the errors and process */
1187 cause = (struct sctp_error_cause *)((caddr_t)ch +
1188 sizeof(struct sctp_chunkhdr));
1189 remaining_length = ntohs(ch->chunk_length);
1190 if (remaining_length > limit) {
1191 remaining_length = limit;
1193 if (remaining_length >= sizeof(struct sctp_chunkhdr)) {
1194 remaining_length -= sizeof(struct sctp_chunkhdr);
1196 remaining_length = 0;
1199 while (remaining_length >= sizeof(struct sctp_error_cause)) {
1200 /* Process an Error Cause */
1201 cause_code = ntohs(cause->code);
1202 cause_length = ntohs(cause->length);
1203 if ((cause_length > remaining_length) || (cause_length == 0)) {
1204 /* Invalid cause length, possibly due to truncation. */
1205 SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in cause - bytes left: %u cause length: %u\n",
1206 remaining_length, cause_length);
1210 /* report the first error cause */
1213 switch (cause_code) {
1214 case SCTP_CAUSE_INVALID_STREAM:
1215 case SCTP_CAUSE_MISSING_PARAM:
1216 case SCTP_CAUSE_INVALID_PARAM:
1217 case SCTP_CAUSE_NO_USER_DATA:
1218 SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %u back? We have a bug :/ (or do they?)\n",
1221 case SCTP_CAUSE_NAT_COLLIDING_STATE:
1222 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags: %x\n",
1224 if (sctp_handle_nat_colliding_state(stcb)) {
1228 case SCTP_CAUSE_NAT_MISSING_STATE:
1229 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags: %x\n",
1231 if (sctp_handle_nat_missing_state(stcb, net)) {
1235 case SCTP_CAUSE_STALE_COOKIE:
1237 * We only act if we have echoed a cookie and are
1240 if ((cause_length >= sizeof(struct sctp_error_stale_cookie)) &&
1241 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1242 struct sctp_error_stale_cookie *stale_cookie;
1244 stale_cookie = (struct sctp_error_stale_cookie *)cause;
1245 asoc->cookie_preserve_req = ntohl(stale_cookie->stale_time);
1246 /* Double it to be more robust on RTX */
1247 if (asoc->cookie_preserve_req <= UINT32_MAX / 2) {
1248 asoc->cookie_preserve_req *= 2;
1250 asoc->cookie_preserve_req = UINT32_MAX;
1252 asoc->stale_cookie_count++;
1253 if (asoc->stale_cookie_count >
1254 asoc->max_init_times) {
1255 sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
1256 /* now free the asoc */
1257 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1258 so = SCTP_INP_SO(stcb->sctp_ep);
1259 atomic_add_int(&stcb->asoc.refcnt, 1);
1260 SCTP_TCB_UNLOCK(stcb);
1261 SCTP_SOCKET_LOCK(so, 1);
1262 SCTP_TCB_LOCK(stcb);
1263 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1265 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1266 SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
1267 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1268 SCTP_SOCKET_UNLOCK(so, 1);
1272 /* blast back to INIT state */
1273 sctp_toss_old_cookies(stcb, &stcb->asoc);
1274 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
1275 sctp_stop_all_cookie_timers(stcb);
1276 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
1279 case SCTP_CAUSE_UNRESOLVABLE_ADDR:
1281 * Nothing we can do here, we don't do hostname
1282 * addresses so if the peer does not like my IPv6
1283 * (or IPv4 for that matter) it does not matter. If
1284 * they don't support that type of address, they can
1285 * NOT possibly get that packet type... i.e. with no
1286 * IPv6 you can't receive a IPv6 packet. so we can
1287 * safely ignore this one. If we ever added support
1288 * for HOSTNAME Addresses, then we would need to do
1292 case SCTP_CAUSE_UNRECOG_CHUNK:
1293 if (cause_length >= sizeof(struct sctp_error_unrecognized_chunk)) {
1294 struct sctp_error_unrecognized_chunk *unrec_chunk;
1296 unrec_chunk = (struct sctp_error_unrecognized_chunk *)cause;
1297 sctp_process_unrecog_chunk(stcb, unrec_chunk->ch.chunk_type, net);
1300 case SCTP_CAUSE_UNRECOG_PARAM:
1301 /* XXX: We only consider the first parameter */
1302 if (cause_length >= sizeof(struct sctp_error_cause) + sizeof(struct sctp_paramhdr)) {
1303 struct sctp_paramhdr *unrec_parameter;
1305 unrec_parameter = (struct sctp_paramhdr *)(cause + 1);
1306 sctp_process_unrecog_param(stcb, ntohs(unrec_parameter->param_type));
1309 case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
1311 * We ignore this since the timer will drive out a
1312 * new cookie anyway and there timer will drive us
1313 * to send a SHUTDOWN_COMPLETE. We can't send one
1314 * here since we don't have their tag.
1317 case SCTP_CAUSE_DELETING_LAST_ADDR:
1318 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1319 case SCTP_CAUSE_DELETING_SRC_ADDR:
1321 * We should NOT get these here, but in a
1324 SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a error cause with code %u.\n",
1327 case SCTP_CAUSE_OUT_OF_RESC:
1329 * And what, pray tell do we do with the fact that
1330 * the peer is out of resources? Not really sure we
1331 * could do anything but abort. I suspect this
1332 * should have came WITH an abort instead of in a
1337 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown code 0x%x\n",
1341 adjust = SCTP_SIZE32(cause_length);
1342 if (remaining_length >= adjust) {
1343 remaining_length -= adjust;
1345 remaining_length = 0;
1347 cause = (struct sctp_error_cause *)((caddr_t)cause + adjust);
1349 sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, code, ch, SCTP_SO_NOT_LOCKED);
1354 sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
1355 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
1356 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
1357 struct sctp_nets *net, int *abort_no_unlock,
1358 uint8_t mflowtype, uint32_t mflowid,
1361 struct sctp_init_ack *init_ack;
1362 struct mbuf *op_err;
1364 SCTPDBG(SCTP_DEBUG_INPUT2,
1365 "sctp_handle_init_ack: handling INIT-ACK\n");
1368 SCTPDBG(SCTP_DEBUG_INPUT2,
1369 "sctp_handle_init_ack: TCB is null\n");
1372 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) {
1373 /* Invalid length */
1374 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1375 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1376 src, dst, sh, op_err,
1379 *abort_no_unlock = 1;
1382 init_ack = &cp->init;
1383 /* validate parameters */
1384 if (init_ack->initiate_tag == 0) {
1385 /* protocol error... send an abort */
1386 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1387 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1388 src, dst, sh, op_err,
1391 *abort_no_unlock = 1;
1394 if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) {
1395 /* protocol error... send an abort */
1396 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1397 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1398 src, dst, sh, op_err,
1401 *abort_no_unlock = 1;
1404 if (init_ack->num_inbound_streams == 0) {
1405 /* protocol error... send an abort */
1406 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1407 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1408 src, dst, sh, op_err,
1411 *abort_no_unlock = 1;
1414 if (init_ack->num_outbound_streams == 0) {
1415 /* protocol error... send an abort */
1416 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1417 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1418 src, dst, sh, op_err,
1421 *abort_no_unlock = 1;
1424 /* process according to association state... */
1425 switch (SCTP_GET_STATE(stcb)) {
1426 case SCTP_STATE_COOKIE_WAIT:
1427 /* this is the expected state for this chunk */
1428 /* process the INIT-ACK parameters */
1429 if (stcb->asoc.primary_destination->dest_state &
1430 SCTP_ADDR_UNCONFIRMED) {
1432 * The primary is where we sent the INIT, we can
1433 * always consider it confirmed when the INIT-ACK is
1434 * returned. Do this before we load addresses
1437 stcb->asoc.primary_destination->dest_state &=
1438 ~SCTP_ADDR_UNCONFIRMED;
1439 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
1440 stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
1442 if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
1443 net, abort_no_unlock,
1446 /* error in parsing parameters */
1449 /* update our state */
1450 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
1451 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_ECHOED);
1453 /* reset the RTO calc */
1454 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1455 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1456 stcb->asoc.overall_error_count,
1458 SCTP_FROM_SCTP_INPUT,
1461 stcb->asoc.overall_error_count = 0;
1462 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
1464 * collapse the init timer back in case of a exponential
1467 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
1470 * the send at the end of the inbound data processing will
1471 * cause the cookie to be sent
1474 case SCTP_STATE_SHUTDOWN_SENT:
1475 /* incorrect state... discard */
1477 case SCTP_STATE_COOKIE_ECHOED:
1478 /* incorrect state... discard */
1480 case SCTP_STATE_OPEN:
1481 /* incorrect state... discard */
1483 case SCTP_STATE_EMPTY:
1484 case SCTP_STATE_INUSE:
1486 /* incorrect state... discard */
1490 SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
1494 static struct sctp_tcb *
1495 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1496 struct sockaddr *src, struct sockaddr *dst,
1497 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1498 struct sctp_inpcb *inp, struct sctp_nets **netp,
1499 struct sockaddr *init_src, int *notification,
1500 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1501 uint8_t mflowtype, uint32_t mflowid,
1502 uint32_t vrf_id, uint16_t port);
1506 * handle a state cookie for an existing association m: input packet mbuf
1507 * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
1508 * "split" mbuf and the cookie signature does not exist offset: offset into
1509 * mbuf to the cookie-echo chunk
1511 static struct sctp_tcb *
1512 sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
1513 struct sockaddr *src, struct sockaddr *dst,
1514 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1515 struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
1516 struct sockaddr *init_src, int *notification,
1517 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1518 uint8_t mflowtype, uint32_t mflowid,
1519 uint32_t vrf_id, uint16_t port)
1521 struct sctp_association *asoc;
1522 struct sctp_init_chunk *init_cp, init_buf;
1523 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1524 struct sctp_nets *net;
1525 struct mbuf *op_err;
1527 int init_offset, initack_offset, i;
1531 #if defined(SCTP_DETAILED_STR_STATS)
1536 /* I know that the TCB is non-NULL from the caller */
1538 for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
1539 if (asoc->cookie_how[how_indx] == 0)
1542 if (how_indx < sizeof(asoc->cookie_how)) {
1543 asoc->cookie_how[how_indx] = 1;
1545 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1546 /* SHUTDOWN came in after sending INIT-ACK */
1547 sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
1548 op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
1549 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
1550 mflowtype, mflowid, inp->fibnum,
1552 if (how_indx < sizeof(asoc->cookie_how))
1553 asoc->cookie_how[how_indx] = 2;
1557 * find and validate the INIT chunk in the cookie (peer's info) the
1558 * INIT should start after the cookie-echo header struct (chunk
1559 * header, state cookie header struct)
1561 init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
1563 init_cp = (struct sctp_init_chunk *)
1564 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1565 (uint8_t *)&init_buf);
1566 if (init_cp == NULL) {
1567 /* could not pull a INIT chunk in cookie */
1570 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1574 * find and validate the INIT-ACK chunk in the cookie (my info) the
1575 * INIT-ACK follows the INIT chunk
1577 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1578 initack_cp = (struct sctp_init_ack_chunk *)
1579 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1580 (uint8_t *)&initack_buf);
1581 if (initack_cp == NULL) {
1582 /* could not pull INIT-ACK chunk in cookie */
1585 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1588 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1589 (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
1591 * case D in Section 5.2.4 Table 2: MMAA process accordingly
1592 * to get into the OPEN state
1594 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1596 * Opps, this means that we somehow generated two vtag's
1597 * the same. I.e. we did:
1599 * <---INIT(tag=a)------
1600 * ----INIT-ACK(tag=t)-->
1601 * ----INIT(tag=t)------> *1
1602 * <---INIT-ACK(tag=a)---
1603 * <----CE(tag=t)------------- *2
1605 * At point *1 we should be generating a different
1606 * tag t'. Which means we would throw away the CE and send
1607 * ours instead. Basically this is case C (throw away side).
1609 if (how_indx < sizeof(asoc->cookie_how))
1610 asoc->cookie_how[how_indx] = 17;
1614 switch (SCTP_GET_STATE(stcb)) {
1615 case SCTP_STATE_COOKIE_WAIT:
1616 case SCTP_STATE_COOKIE_ECHOED:
1618 * INIT was sent but got a COOKIE_ECHO with the
1619 * correct tags... just accept it...but we must
1620 * process the init so that we can make sure we have
1621 * the right seq no's.
1623 /* First we must process the INIT !! */
1624 retval = sctp_process_init(init_cp, stcb);
1626 if (how_indx < sizeof(asoc->cookie_how))
1627 asoc->cookie_how[how_indx] = 3;
1630 /* we have already processed the INIT so no problem */
1631 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp,
1633 SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
1634 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp,
1636 SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
1637 /* update current state */
1638 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1639 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1641 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1643 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1644 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1645 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1646 stcb->sctp_ep, stcb, asoc->primary_destination);
1648 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1649 sctp_stop_all_cookie_timers(stcb);
1650 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1651 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1652 (!SCTP_IS_LISTENING(inp))) {
1653 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1657 * Here is where collision would go if we
1658 * did a connect() and instead got a
1659 * init/init-ack/cookie done before the
1660 * init-ack came back..
1662 stcb->sctp_ep->sctp_flags |=
1663 SCTP_PCB_FLAGS_CONNECTED;
1664 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1665 so = SCTP_INP_SO(stcb->sctp_ep);
1666 atomic_add_int(&stcb->asoc.refcnt, 1);
1667 SCTP_TCB_UNLOCK(stcb);
1668 SCTP_SOCKET_LOCK(so, 1);
1669 SCTP_TCB_LOCK(stcb);
1670 atomic_add_int(&stcb->asoc.refcnt, -1);
1671 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1672 SCTP_SOCKET_UNLOCK(so, 1);
1676 soisconnected(stcb->sctp_socket);
1677 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1678 SCTP_SOCKET_UNLOCK(so, 1);
1681 /* notify upper layer */
1682 *notification = SCTP_NOTIFY_ASSOC_UP;
1684 * since we did not send a HB make sure we don't
1687 old.tv_sec = cookie->time_entered.tv_sec;
1688 old.tv_usec = cookie->time_entered.tv_usec;
1689 net->hb_responded = 1;
1690 sctp_calculate_rto(stcb, asoc, net, &old,
1691 SCTP_RTT_FROM_NON_DATA);
1693 if (stcb->asoc.sctp_autoclose_ticks &&
1694 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1695 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1701 * we're in the OPEN state (or beyond), so peer must
1702 * have simply lost the COOKIE-ACK
1706 sctp_stop_all_cookie_timers(stcb);
1708 * We ignore the return code here.. not sure if we should
1709 * somehow abort.. but we do have an existing asoc. This
1710 * really should not fail.
1712 if (sctp_load_addresses_from_init(stcb, m,
1713 init_offset + sizeof(struct sctp_init_chunk),
1714 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1715 if (how_indx < sizeof(asoc->cookie_how))
1716 asoc->cookie_how[how_indx] = 4;
1719 /* respond with a COOKIE-ACK */
1720 sctp_toss_old_cookies(stcb, asoc);
1721 sctp_send_cookie_ack(stcb);
1722 if (how_indx < sizeof(asoc->cookie_how))
1723 asoc->cookie_how[how_indx] = 5;
1727 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1728 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1729 cookie->tie_tag_my_vtag == 0 &&
1730 cookie->tie_tag_peer_vtag == 0) {
1732 * case C in Section 5.2.4 Table 2: XMOO silently discard
1734 if (how_indx < sizeof(asoc->cookie_how))
1735 asoc->cookie_how[how_indx] = 6;
1739 * If nat support, and the below and stcb is established, send back
1740 * a ABORT(colliding state) if we are established.
1742 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) &&
1743 (asoc->peer_supports_nat) &&
1744 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1745 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1746 (asoc->peer_vtag == 0)))) {
1748 * Special case - Peer's support nat. We may have two init's
1749 * that we gave out the same tag on since one was not
1750 * established.. i.e. we get INIT from host-1 behind the nat
1751 * and we respond tag-a, we get a INIT from host-2 behind
1752 * the nat and we get tag-a again. Then we bring up host-1
1753 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1754 * Now we have colliding state. We must send an abort here
1755 * with colliding state indication.
1757 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1758 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1759 mflowtype, mflowid, inp->fibnum,
1763 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1764 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1765 (asoc->peer_vtag == 0))) {
1767 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1768 * should be ok, re-accept peer info
1770 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1772 * Extension of case C. If we hit this, then the
1773 * random number generator returned the same vtag
1774 * when we first sent our INIT-ACK and when we later
1775 * sent our INIT. The side with the seq numbers that
1776 * are different will be the one that normnally
1777 * would have hit case C. This in effect "extends"
1778 * our vtags in this collision case to be 64 bits.
1779 * The same collision could occur aka you get both
1780 * vtag and seq number the same twice in a row.. but
1781 * is much less likely. If it did happen then we
1782 * would proceed through and bring up the assoc.. we
1783 * may end up with the wrong stream setup however..
1784 * which would be bad.. but there is no way to
1785 * tell.. until we send on a stream that does not
1788 if (how_indx < sizeof(asoc->cookie_how))
1789 asoc->cookie_how[how_indx] = 7;
1793 if (how_indx < sizeof(asoc->cookie_how))
1794 asoc->cookie_how[how_indx] = 8;
1795 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1796 SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1797 sctp_stop_all_cookie_timers(stcb);
1799 * since we did not send a HB make sure we don't double
1802 net->hb_responded = 1;
1803 if (stcb->asoc.sctp_autoclose_ticks &&
1804 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1805 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1808 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1809 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
1811 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1813 * Ok the peer probably discarded our data (if we
1814 * echoed a cookie+data). So anything on the
1815 * sent_queue should be marked for retransmit, we
1816 * may not get something to kick us so it COULD
1817 * still take a timeout to move these.. but it can't
1818 * hurt to mark them.
1820 struct sctp_tmit_chunk *chk;
1822 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1823 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1824 chk->sent = SCTP_DATAGRAM_RESEND;
1825 sctp_flight_size_decrease(chk);
1826 sctp_total_flight_decrease(stcb, chk);
1827 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1833 /* process the INIT info (peer's info) */
1834 retval = sctp_process_init(init_cp, stcb);
1836 if (how_indx < sizeof(asoc->cookie_how))
1837 asoc->cookie_how[how_indx] = 9;
1840 if (sctp_load_addresses_from_init(stcb, m,
1841 init_offset + sizeof(struct sctp_init_chunk),
1842 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1843 if (how_indx < sizeof(asoc->cookie_how))
1844 asoc->cookie_how[how_indx] = 10;
1847 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
1848 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1849 *notification = SCTP_NOTIFY_ASSOC_UP;
1851 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1852 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1853 (!SCTP_IS_LISTENING(inp))) {
1854 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1857 stcb->sctp_ep->sctp_flags |=
1858 SCTP_PCB_FLAGS_CONNECTED;
1859 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1860 so = SCTP_INP_SO(stcb->sctp_ep);
1861 atomic_add_int(&stcb->asoc.refcnt, 1);
1862 SCTP_TCB_UNLOCK(stcb);
1863 SCTP_SOCKET_LOCK(so, 1);
1864 SCTP_TCB_LOCK(stcb);
1865 atomic_add_int(&stcb->asoc.refcnt, -1);
1866 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1867 SCTP_SOCKET_UNLOCK(so, 1);
1871 soisconnected(stcb->sctp_socket);
1872 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1873 SCTP_SOCKET_UNLOCK(so, 1);
1876 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1877 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1879 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1880 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1881 } else if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1882 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1884 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1886 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1887 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1888 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1889 stcb->sctp_ep, stcb, asoc->primary_destination);
1891 sctp_stop_all_cookie_timers(stcb);
1892 sctp_toss_old_cookies(stcb, asoc);
1893 sctp_send_cookie_ack(stcb);
1896 * only if we have retrans set do we do this. What
1897 * this call does is get only the COOKIE-ACK out and
1898 * then when we return the normal call to
1899 * sctp_chunk_output will get the retrans out behind
1902 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1904 if (how_indx < sizeof(asoc->cookie_how))
1905 asoc->cookie_how[how_indx] = 11;
1909 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1910 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1911 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1912 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1913 cookie->tie_tag_peer_vtag != 0) {
1914 struct sctpasochead *head;
1915 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1919 if (asoc->peer_supports_nat) {
1921 * This is a gross gross hack. Just call the
1922 * cookie_new code since we are allowing a duplicate
1923 * association. I hope this works...
1925 return (sctp_process_cookie_new(m, iphlen, offset, src, dst,
1926 sh, cookie, cookie_len,
1927 inp, netp, init_src, notification,
1928 auth_skipped, auth_offset, auth_len,
1933 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1936 if (how_indx < sizeof(asoc->cookie_how))
1937 asoc->cookie_how[how_indx] = 12;
1938 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net,
1939 SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
1940 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1941 SCTP_FROM_SCTP_INPUT + SCTP_LOC_17);
1943 /* notify upper layer */
1944 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1945 atomic_add_int(&stcb->asoc.refcnt, 1);
1946 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_OPEN) &&
1947 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1948 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
1949 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1951 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1952 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1953 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1954 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1956 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1957 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1958 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1959 stcb->sctp_ep, stcb, asoc->primary_destination);
1961 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1962 /* move to OPEN state, if not in SHUTDOWN_SENT */
1963 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1965 asoc->pre_open_streams =
1966 ntohs(initack_cp->init.num_outbound_streams);
1967 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1968 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1969 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1971 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1973 asoc->str_reset_seq_in = asoc->init_seq_number;
1975 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1976 if (asoc->mapping_array) {
1977 memset(asoc->mapping_array, 0,
1978 asoc->mapping_array_size);
1980 if (asoc->nr_mapping_array) {
1981 memset(asoc->nr_mapping_array, 0,
1982 asoc->mapping_array_size);
1984 SCTP_TCB_UNLOCK(stcb);
1985 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1986 so = SCTP_INP_SO(stcb->sctp_ep);
1987 SCTP_SOCKET_LOCK(so, 1);
1989 SCTP_INP_INFO_WLOCK();
1990 SCTP_INP_WLOCK(stcb->sctp_ep);
1991 SCTP_TCB_LOCK(stcb);
1992 atomic_add_int(&stcb->asoc.refcnt, -1);
1993 /* send up all the data */
1994 SCTP_TCB_SEND_LOCK(stcb);
1996 sctp_report_all_outbound(stcb, 0, 1, SCTP_SO_LOCKED);
1997 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1998 stcb->asoc.strmout[i].chunks_on_queues = 0;
1999 #if defined(SCTP_DETAILED_STR_STATS)
2000 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
2001 asoc->strmout[i].abandoned_sent[j] = 0;
2002 asoc->strmout[i].abandoned_unsent[j] = 0;
2005 asoc->strmout[i].abandoned_sent[0] = 0;
2006 asoc->strmout[i].abandoned_unsent[0] = 0;
2008 stcb->asoc.strmout[i].sid = i;
2009 stcb->asoc.strmout[i].next_mid_ordered = 0;
2010 stcb->asoc.strmout[i].next_mid_unordered = 0;
2011 stcb->asoc.strmout[i].last_msg_incomplete = 0;
2013 /* process the INIT-ACK info (my info) */
2014 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2015 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2017 /* pull from vtag hash */
2018 LIST_REMOVE(stcb, sctp_asocs);
2019 /* re-insert to new vtag position */
2020 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
2021 SCTP_BASE_INFO(hashasocmark))];
2023 * put it in the bucket in the vtag hash of assoc's for the
2026 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
2028 SCTP_TCB_SEND_UNLOCK(stcb);
2029 SCTP_INP_WUNLOCK(stcb->sctp_ep);
2030 SCTP_INP_INFO_WUNLOCK();
2031 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2032 SCTP_SOCKET_UNLOCK(so, 1);
2034 asoc->total_flight = 0;
2035 asoc->total_flight_count = 0;
2036 /* process the INIT info (peer's info) */
2037 retval = sctp_process_init(init_cp, stcb);
2039 if (how_indx < sizeof(asoc->cookie_how))
2040 asoc->cookie_how[how_indx] = 13;
2045 * since we did not send a HB make sure we don't double
2048 net->hb_responded = 1;
2050 if (sctp_load_addresses_from_init(stcb, m,
2051 init_offset + sizeof(struct sctp_init_chunk),
2052 initack_offset, src, dst, init_src, stcb->asoc.port)) {
2053 if (how_indx < sizeof(asoc->cookie_how))
2054 asoc->cookie_how[how_indx] = 14;
2058 /* respond with a COOKIE-ACK */
2059 sctp_stop_all_cookie_timers(stcb);
2060 sctp_toss_old_cookies(stcb, asoc);
2061 sctp_send_cookie_ack(stcb);
2062 if (how_indx < sizeof(asoc->cookie_how))
2063 asoc->cookie_how[how_indx] = 15;
2067 if (how_indx < sizeof(asoc->cookie_how))
2068 asoc->cookie_how[how_indx] = 16;
2069 /* all other cases... */
2075 * handle a state cookie for a new association m: input packet mbuf chain--
2076 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
2077 * and the cookie signature does not exist offset: offset into mbuf to the
2078 * cookie-echo chunk length: length of the cookie chunk to: where the init
2079 * was from returns a new TCB
2081 static struct sctp_tcb *
2082 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
2083 struct sockaddr *src, struct sockaddr *dst,
2084 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
2085 struct sctp_inpcb *inp, struct sctp_nets **netp,
2086 struct sockaddr *init_src, int *notification,
2087 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2088 uint8_t mflowtype, uint32_t mflowid,
2089 uint32_t vrf_id, uint16_t port)
2091 struct sctp_tcb *stcb;
2092 struct sctp_init_chunk *init_cp, init_buf;
2093 struct sctp_init_ack_chunk *initack_cp, initack_buf;
2094 union sctp_sockstore store;
2095 struct sctp_association *asoc;
2096 int init_offset, initack_offset, initack_limit;
2099 uint8_t auth_chunk_buf[SCTP_PARAM_BUFFER_SIZE];
2100 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2103 so = SCTP_INP_SO(inp);
2107 * find and validate the INIT chunk in the cookie (peer's info) the
2108 * INIT should start after the cookie-echo header struct (chunk
2109 * header, state cookie header struct)
2111 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
2112 init_cp = (struct sctp_init_chunk *)
2113 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
2114 (uint8_t *)&init_buf);
2115 if (init_cp == NULL) {
2116 /* could not pull a INIT chunk in cookie */
2117 SCTPDBG(SCTP_DEBUG_INPUT1,
2118 "process_cookie_new: could not pull INIT chunk hdr\n");
2121 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
2122 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
2125 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
2127 * find and validate the INIT-ACK chunk in the cookie (my info) the
2128 * INIT-ACK follows the INIT chunk
2130 initack_cp = (struct sctp_init_ack_chunk *)
2131 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
2132 (uint8_t *)&initack_buf);
2133 if (initack_cp == NULL) {
2134 /* could not pull INIT-ACK chunk in cookie */
2135 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
2138 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
2142 * NOTE: We can't use the INIT_ACK's chk_length to determine the
2143 * "initack_limit" value. This is because the chk_length field
2144 * includes the length of the cookie, but the cookie is omitted when
2145 * the INIT and INIT_ACK are tacked onto the cookie...
2147 initack_limit = offset + cookie_len;
2150 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2155 * Here we do a trick, we set in NULL for the proc/thread argument.
2156 * We do this since in effect we only use the p argument when the
2157 * socket is unbound and we must do an implicit bind. Since we are
2158 * getting a cookie, we cannot be unbound.
2160 stcb = sctp_aloc_assoc(inp, init_src, &error,
2161 ntohl(initack_cp->init.initiate_tag), vrf_id,
2162 ntohs(initack_cp->init.num_outbound_streams),
2164 (struct thread *)NULL,
2165 SCTP_DONT_INITIALIZE_AUTH_PARAMS);
2167 struct mbuf *op_err;
2169 /* memory problem? */
2170 SCTPDBG(SCTP_DEBUG_INPUT1,
2171 "process_cookie_new: no room for another TCB!\n");
2172 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2173 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2174 src, dst, sh, op_err,
2179 /* get the correct sctp_nets */
2181 *netp = sctp_findnet(stcb, init_src);
2184 /* get scope variables out of cookie */
2185 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2186 asoc->scope.site_scope = cookie->site_scope;
2187 asoc->scope.local_scope = cookie->local_scope;
2188 asoc->scope.loopback_scope = cookie->loopback_scope;
2190 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2191 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2192 struct mbuf *op_err;
2195 * Houston we have a problem. The EP changed while the
2196 * cookie was in flight. Only recourse is to abort the
2199 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2200 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2201 src, dst, sh, op_err,
2204 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2205 atomic_add_int(&stcb->asoc.refcnt, 1);
2206 SCTP_TCB_UNLOCK(stcb);
2207 SCTP_SOCKET_LOCK(so, 1);
2208 SCTP_TCB_LOCK(stcb);
2209 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2211 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2212 SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2213 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2214 SCTP_SOCKET_UNLOCK(so, 1);
2218 /* process the INIT-ACK info (my info) */
2219 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2220 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2221 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
2222 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
2223 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
2224 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
2225 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
2226 asoc->str_reset_seq_in = asoc->init_seq_number;
2228 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
2230 /* process the INIT info (peer's info) */
2232 retval = sctp_process_init(init_cp, stcb);
2236 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2237 atomic_add_int(&stcb->asoc.refcnt, 1);
2238 SCTP_TCB_UNLOCK(stcb);
2239 SCTP_SOCKET_LOCK(so, 1);
2240 SCTP_TCB_LOCK(stcb);
2241 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2243 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2244 SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2245 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2246 SCTP_SOCKET_UNLOCK(so, 1);
2250 /* load all addresses */
2251 if (sctp_load_addresses_from_init(stcb, m,
2252 init_offset + sizeof(struct sctp_init_chunk), initack_offset,
2253 src, dst, init_src, port)) {
2254 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2255 atomic_add_int(&stcb->asoc.refcnt, 1);
2256 SCTP_TCB_UNLOCK(stcb);
2257 SCTP_SOCKET_LOCK(so, 1);
2258 SCTP_TCB_LOCK(stcb);
2259 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2261 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2262 SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2263 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2264 SCTP_SOCKET_UNLOCK(so, 1);
2269 * verify any preceding AUTH chunk that was skipped
2271 /* pull the local authentication parameters from the cookie/init-ack */
2272 sctp_auth_get_cookie_params(stcb, m,
2273 initack_offset + sizeof(struct sctp_init_ack_chunk),
2274 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2276 struct sctp_auth_chunk *auth;
2278 auth = (struct sctp_auth_chunk *)
2279 sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2280 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2281 /* auth HMAC failed, dump the assoc and packet */
2282 SCTPDBG(SCTP_DEBUG_AUTH1,
2283 "COOKIE-ECHO: AUTH failed\n");
2284 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2285 atomic_add_int(&stcb->asoc.refcnt, 1);
2286 SCTP_TCB_UNLOCK(stcb);
2287 SCTP_SOCKET_LOCK(so, 1);
2288 SCTP_TCB_LOCK(stcb);
2289 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2291 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2292 SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
2293 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2294 SCTP_SOCKET_UNLOCK(so, 1);
2298 /* remaining chunks checked... good to go */
2299 stcb->asoc.authenticated = 1;
2304 * if we're doing ASCONFs, check to see if we have any new local
2305 * addresses that need to get added to the peer (eg. addresses
2306 * changed while cookie echo in flight). This needs to be done
2307 * after we go to the OPEN state to do the correct asconf
2308 * processing. else, make sure we have the correct addresses in our
2312 /* warning, we re-use sin, sin6, sa_store here! */
2313 /* pull in local_address (our "from" address) */
2314 switch (cookie->laddr_type) {
2316 case SCTP_IPV4_ADDRESS:
2317 /* source addr is IPv4 */
2318 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2319 store.sin.sin_family = AF_INET;
2320 store.sin.sin_len = sizeof(struct sockaddr_in);
2321 store.sin.sin_addr.s_addr = cookie->laddress[0];
2325 case SCTP_IPV6_ADDRESS:
2326 /* source addr is IPv6 */
2327 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2328 store.sin6.sin6_family = AF_INET6;
2329 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2330 store.sin6.sin6_scope_id = cookie->scope_id;
2331 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2335 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2336 atomic_add_int(&stcb->asoc.refcnt, 1);
2337 SCTP_TCB_UNLOCK(stcb);
2338 SCTP_SOCKET_LOCK(so, 1);
2339 SCTP_TCB_LOCK(stcb);
2340 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2342 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2343 SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
2344 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2345 SCTP_SOCKET_UNLOCK(so, 1);
2350 /* update current state */
2351 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2352 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2353 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2354 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2355 stcb->sctp_ep, stcb, asoc->primary_destination);
2357 sctp_stop_all_cookie_timers(stcb);
2358 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2359 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2361 /* set up to notify upper layer */
2362 *notification = SCTP_NOTIFY_ASSOC_UP;
2363 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2364 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2365 (!SCTP_IS_LISTENING(inp))) {
2367 * This is an endpoint that called connect() how it got a
2368 * cookie that is NEW is a bit of a mystery. It must be that
2369 * the INIT was sent, but before it got there.. a complete
2370 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2371 * should have went to the other code.. not here.. oh well..
2372 * a bit of protection is worth having..
2374 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2375 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2376 atomic_add_int(&stcb->asoc.refcnt, 1);
2377 SCTP_TCB_UNLOCK(stcb);
2378 SCTP_SOCKET_LOCK(so, 1);
2379 SCTP_TCB_LOCK(stcb);
2380 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2381 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2382 SCTP_SOCKET_UNLOCK(so, 1);
2386 soisconnected(stcb->sctp_socket);
2387 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2388 SCTP_SOCKET_UNLOCK(so, 1);
2390 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2391 (SCTP_IS_LISTENING(inp))) {
2393 * We don't want to do anything with this one. Since it is
2394 * the listening guy. The timer will get started for
2395 * accepted connections in the caller.
2399 /* since we did not send a HB make sure we don't double things */
2400 if ((netp) && (*netp))
2401 (*netp)->hb_responded = 1;
2403 if (stcb->asoc.sctp_autoclose_ticks &&
2404 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2405 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2407 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2408 if ((netp != NULL) && (*netp != NULL)) {
2411 /* calculate the RTT and set the encaps port */
2412 old.tv_sec = cookie->time_entered.tv_sec;
2413 old.tv_usec = cookie->time_entered.tv_usec;
2414 sctp_calculate_rto(stcb, asoc, *netp, &old, SCTP_RTT_FROM_NON_DATA);
2416 /* respond with a COOKIE-ACK */
2417 sctp_send_cookie_ack(stcb);
2420 * check the address lists for any ASCONFs that need to be sent
2421 * AFTER the cookie-ack is sent
2423 sctp_check_address_list(stcb, m,
2424 initack_offset + sizeof(struct sctp_init_ack_chunk),
2425 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2426 &store.sa, cookie->local_scope, cookie->site_scope,
2427 cookie->ipv4_scope, cookie->loopback_scope);
2434 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2435 * we NEED to make sure we are not already using the vtag. If so we
2436 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2437 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2438 SCTP_BASE_INFO(hashasocmark))];
2439 LIST_FOREACH(stcb, head, sctp_asocs) {
2440 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2441 -- SEND ABORT - TRY AGAIN --
2447 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2448 * existing (non-NULL) TCB
2450 static struct mbuf *
2451 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2452 struct sockaddr *src, struct sockaddr *dst,
2453 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2454 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2455 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2456 struct sctp_tcb **locked_tcb,
2457 uint8_t mflowtype, uint32_t mflowid,
2458 uint32_t vrf_id, uint16_t port)
2460 struct sctp_state_cookie *cookie;
2461 struct sctp_tcb *l_stcb = *stcb;
2462 struct sctp_inpcb *l_inp;
2463 struct sockaddr *to;
2464 struct sctp_pcb *ep;
2466 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2468 uint8_t cookie_ok = 0;
2469 unsigned int sig_offset, cookie_offset;
2470 unsigned int cookie_len;
2472 struct timeval time_expires;
2473 int notification = 0;
2474 struct sctp_nets *netl;
2475 int had_a_existing_tcb = 0;
2476 int send_int_conf = 0;
2478 struct sockaddr_in sin;
2481 struct sockaddr_in6 sin6;
2484 SCTPDBG(SCTP_DEBUG_INPUT2,
2485 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2487 if (inp_p == NULL) {
2490 cookie = &cp->cookie;
2491 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2492 cookie_len = ntohs(cp->ch.chunk_length);
2494 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2495 sizeof(struct sctp_init_chunk) +
2496 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2497 /* cookie too small */
2500 if ((cookie->peerport != sh->src_port) ||
2501 (cookie->myport != sh->dest_port) ||
2502 (cookie->my_vtag != sh->v_tag)) {
2504 * invalid ports or bad tag. Note that we always leave the
2505 * v_tag in the header in network order and when we stored
2506 * it in the my_vtag slot we also left it in network order.
2507 * This maintains the match even though it may be in the
2508 * opposite byte order of the machine :->
2513 * split off the signature into its own mbuf (since it should not be
2514 * calculated in the sctp_hmac_m() call).
2516 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2517 m_sig = m_split(m, sig_offset, M_NOWAIT);
2518 if (m_sig == NULL) {
2519 /* out of memory or ?? */
2522 #ifdef SCTP_MBUF_LOGGING
2523 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2524 sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
2529 * compute the signature/digest for the cookie
2531 ep = &(*inp_p)->sctp_ep;
2534 SCTP_TCB_UNLOCK(l_stcb);
2536 SCTP_INP_RLOCK(l_inp);
2538 SCTP_TCB_LOCK(l_stcb);
2540 /* which cookie is it? */
2541 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2542 (ep->current_secret_number != ep->last_secret_number)) {
2543 /* it's the old cookie */
2544 (void)sctp_hmac_m(SCTP_HMAC,
2545 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2546 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2548 /* it's the current cookie */
2549 (void)sctp_hmac_m(SCTP_HMAC,
2550 (uint8_t *)ep->secret_key[(int)ep->current_secret_number],
2551 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2553 /* get the signature */
2554 SCTP_INP_RUNLOCK(l_inp);
2555 sig = (uint8_t *)sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *)&tmp_sig);
2557 /* couldn't find signature */
2558 sctp_m_freem(m_sig);
2561 /* compare the received digest with the computed digest */
2562 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2563 /* try the old cookie? */
2564 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2565 (ep->current_secret_number != ep->last_secret_number)) {
2566 /* compute digest with old */
2567 (void)sctp_hmac_m(SCTP_HMAC,
2568 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2569 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2571 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2579 * Now before we continue we must reconstruct our mbuf so that
2580 * normal processing of any other chunks will work.
2586 while (SCTP_BUF_NEXT(m_at) != NULL) {
2587 m_at = SCTP_BUF_NEXT(m_at);
2589 SCTP_BUF_NEXT(m_at) = m_sig;
2592 if (cookie_ok == 0) {
2593 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2594 SCTPDBG(SCTP_DEBUG_INPUT2,
2595 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2596 (uint32_t)offset, cookie_offset, sig_offset);
2601 * check the cookie timestamps to be sure it's not stale
2603 (void)SCTP_GETTIME_TIMEVAL(&now);
2604 /* Expire time is in Ticks, so we convert to seconds */
2605 time_expires.tv_sec = cookie->time_entered.tv_sec + TICKS_TO_SEC(cookie->cookie_life);
2606 time_expires.tv_usec = cookie->time_entered.tv_usec;
2607 if (timevalcmp(&now, &time_expires, >)) {
2608 /* cookie is stale! */
2609 struct mbuf *op_err;
2610 struct sctp_error_stale_cookie *cause;
2611 struct timeval diff;
2614 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
2615 0, M_NOWAIT, 1, MT_DATA);
2616 if (op_err == NULL) {
2621 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
2622 cause = mtod(op_err, struct sctp_error_stale_cookie *);
2623 cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
2624 cause->cause.length = htons((sizeof(struct sctp_paramhdr) +
2625 (sizeof(uint32_t))));
2627 timevalsub(&diff, &time_expires);
2628 if ((uint32_t)diff.tv_sec > UINT32_MAX / 1000000) {
2629 staleness = UINT32_MAX;
2631 staleness = diff.tv_sec * 1000000;
2633 if (UINT32_MAX - staleness >= (uint32_t)diff.tv_usec) {
2634 staleness += diff.tv_usec;
2636 staleness = UINT32_MAX;
2638 cause->stale_time = htonl(staleness);
2639 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2640 mflowtype, mflowid, l_inp->fibnum,
2645 * Now we must see with the lookup address if we have an existing
2646 * asoc. This will only happen if we were in the COOKIE-WAIT state
2647 * and a INIT collided with us and somewhere the peer sent the
2648 * cookie on another address besides the single address our assoc
2649 * had for him. In this case we will have one of the tie-tags set at
2650 * least AND the address field in the cookie can be used to look it
2654 switch (cookie->addr_type) {
2656 case SCTP_IPV6_ADDRESS:
2657 memset(&sin6, 0, sizeof(sin6));
2658 sin6.sin6_family = AF_INET6;
2659 sin6.sin6_len = sizeof(sin6);
2660 sin6.sin6_port = sh->src_port;
2661 sin6.sin6_scope_id = cookie->scope_id;
2662 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2663 sizeof(sin6.sin6_addr.s6_addr));
2664 to = (struct sockaddr *)&sin6;
2668 case SCTP_IPV4_ADDRESS:
2669 memset(&sin, 0, sizeof(sin));
2670 sin.sin_family = AF_INET;
2671 sin.sin_len = sizeof(sin);
2672 sin.sin_port = sh->src_port;
2673 sin.sin_addr.s_addr = cookie->address[0];
2674 to = (struct sockaddr *)&sin;
2678 /* This should not happen */
2681 if (*stcb == NULL) {
2682 /* Yep, lets check */
2683 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2684 if (*stcb == NULL) {
2686 * We should have only got back the same inp. If we
2687 * got back a different ep we have a problem. The
2688 * original findep got back l_inp and now
2690 if (l_inp != *inp_p) {
2691 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2694 if (*locked_tcb == NULL) {
2696 * In this case we found the assoc only
2697 * after we locked the create lock. This
2698 * means we are in a colliding case and we
2699 * must make sure that we unlock the tcb if
2700 * its one of the cases where we throw away
2701 * the incoming packets.
2703 *locked_tcb = *stcb;
2706 * We must also increment the inp ref count
2707 * since the ref_count flags was set when we
2708 * did not find the TCB, now we found it
2709 * which reduces the refcount.. we must
2710 * raise it back out to balance it all :-)
2712 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2713 if ((*stcb)->sctp_ep != l_inp) {
2714 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2715 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2721 cookie_len -= SCTP_SIGNATURE_SIZE;
2722 if (*stcb == NULL) {
2723 /* this is the "normal" case... get a new TCB */
2724 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2725 cookie, cookie_len, *inp_p,
2726 netp, to, ¬ification,
2727 auth_skipped, auth_offset, auth_len,
2731 /* this is abnormal... cookie-echo on existing TCB */
2732 had_a_existing_tcb = 1;
2733 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2735 cookie, cookie_len, *inp_p, *stcb, netp, to,
2736 ¬ification, auth_skipped, auth_offset, auth_len,
2741 if (*stcb == NULL) {
2742 /* still no TCB... must be bad cookie-echo */
2745 if (*netp != NULL) {
2746 (*netp)->flowtype = mflowtype;
2747 (*netp)->flowid = mflowid;
2750 * Ok, we built an association so confirm the address we sent the
2753 netl = sctp_findnet(*stcb, to);
2755 * This code should in theory NOT run but
2758 /* TSNH! Huh, why do I need to add this address here? */
2759 if (sctp_add_remote_addr(*stcb, to, NULL, port,
2760 SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2763 netl = sctp_findnet(*stcb, to);
2766 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2767 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2768 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2773 sctp_start_net_timers(*stcb);
2774 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2775 if (!had_a_existing_tcb ||
2776 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2778 * If we have a NEW cookie or the connect never
2779 * reached the connected state during collision we
2780 * must do the TCP accept thing.
2782 struct socket *so, *oso;
2783 struct sctp_inpcb *inp;
2785 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2787 * For a restart we will keep the same
2788 * socket, no need to do anything. I THINK!!
2790 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2791 if (send_int_conf) {
2792 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2793 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2797 oso = (*inp_p)->sctp_socket;
2798 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2799 SCTP_TCB_UNLOCK((*stcb));
2800 CURVNET_SET(oso->so_vnet);
2801 so = sonewconn(oso, 0
2804 SCTP_TCB_LOCK((*stcb));
2805 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2808 struct mbuf *op_err;
2809 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2810 struct socket *pcb_so;
2812 /* Too many sockets */
2813 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2814 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2815 sctp_abort_association(*inp_p, NULL, m, iphlen,
2816 src, dst, sh, op_err,
2819 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2820 pcb_so = SCTP_INP_SO(*inp_p);
2821 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2822 SCTP_TCB_UNLOCK((*stcb));
2823 SCTP_SOCKET_LOCK(pcb_so, 1);
2824 SCTP_TCB_LOCK((*stcb));
2825 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2827 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2828 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2829 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2830 SCTP_SOCKET_UNLOCK(pcb_so, 1);
2834 inp = (struct sctp_inpcb *)so->so_pcb;
2835 SCTP_INP_INCR_REF(inp);
2837 * We add the unbound flag here so that if we get an
2838 * soabort() before we get the move_pcb done, we
2839 * will properly cleanup.
2841 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2842 SCTP_PCB_FLAGS_CONNECTED |
2843 SCTP_PCB_FLAGS_IN_TCPPOOL |
2844 SCTP_PCB_FLAGS_UNBOUND |
2845 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2846 SCTP_PCB_FLAGS_DONT_WAKE);
2847 inp->sctp_features = (*inp_p)->sctp_features;
2848 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2849 inp->sctp_socket = so;
2850 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2851 inp->max_cwnd = (*inp_p)->max_cwnd;
2852 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2853 inp->ecn_supported = (*inp_p)->ecn_supported;
2854 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2855 inp->auth_supported = (*inp_p)->auth_supported;
2856 inp->asconf_supported = (*inp_p)->asconf_supported;
2857 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2858 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2859 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2860 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2861 inp->sctp_context = (*inp_p)->sctp_context;
2862 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2863 inp->fibnum = (*inp_p)->fibnum;
2864 inp->inp_starting_point_for_iterator = NULL;
2866 * copy in the authentication parameters from the
2869 if (inp->sctp_ep.local_hmacs)
2870 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2871 inp->sctp_ep.local_hmacs =
2872 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2873 if (inp->sctp_ep.local_auth_chunks)
2874 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2875 inp->sctp_ep.local_auth_chunks =
2876 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2879 * Now we must move it from one hash table to
2880 * another and get the tcb in the right place.
2884 * This is where the one-2-one socket is put into
2885 * the accept state waiting for the accept!
2888 SCTP_ADD_SUBSTATE(*stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
2890 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2892 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2893 SCTP_TCB_UNLOCK((*stcb));
2895 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2897 SCTP_TCB_LOCK((*stcb));
2898 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2902 * now we must check to see if we were aborted while
2903 * the move was going on and the lock/unlock
2906 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2908 * yep it was, we leave the assoc attached
2909 * to the socket since the sctp_inpcb_free()
2910 * call will send an abort for us.
2912 SCTP_INP_DECR_REF(inp);
2915 SCTP_INP_DECR_REF(inp);
2916 /* Switch over to the new guy */
2918 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2919 if (send_int_conf) {
2920 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2921 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2925 * Pull it from the incomplete queue and wake the
2928 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2929 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2930 SCTP_TCB_UNLOCK((*stcb));
2931 SCTP_SOCKET_LOCK(so, 1);
2934 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2935 SCTP_TCB_LOCK((*stcb));
2936 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2937 SCTP_SOCKET_UNLOCK(so, 1);
2943 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2945 if (send_int_conf) {
2946 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2947 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2953 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2954 struct sctp_tcb *stcb, struct sctp_nets *net)
2956 /* cp must not be used, others call this without a c-ack :-) */
2957 struct sctp_association *asoc;
2959 SCTPDBG(SCTP_DEBUG_INPUT2,
2960 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2961 if ((stcb == NULL) || (net == NULL)) {
2966 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
2967 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
2968 asoc->overall_error_count,
2970 SCTP_FROM_SCTP_INPUT,
2973 asoc->overall_error_count = 0;
2974 sctp_stop_all_cookie_timers(stcb);
2975 /* process according to association state */
2976 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
2977 /* state change only needed when I am in right state */
2978 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2979 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2980 sctp_start_net_timers(stcb);
2981 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2982 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2983 stcb->sctp_ep, stcb, asoc->primary_destination);
2987 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2988 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2989 if (asoc->overall_error_count == 0) {
2990 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
2991 SCTP_RTT_FROM_NON_DATA);
2993 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2994 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2995 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2996 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2997 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3001 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
3002 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3003 so = SCTP_INP_SO(stcb->sctp_ep);
3004 atomic_add_int(&stcb->asoc.refcnt, 1);
3005 SCTP_TCB_UNLOCK(stcb);
3006 SCTP_SOCKET_LOCK(so, 1);
3007 SCTP_TCB_LOCK(stcb);
3008 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3010 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
3011 soisconnected(stcb->sctp_socket);
3013 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3014 SCTP_SOCKET_UNLOCK(so, 1);
3018 * since we did not send a HB make sure we don't double
3021 net->hb_responded = 1;
3023 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
3025 * We don't need to do the asconf thing, nor hb or
3026 * autoclose if the socket is closed.
3031 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
3035 if (stcb->asoc.sctp_autoclose_ticks &&
3036 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
3037 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
3038 stcb->sctp_ep, stcb, NULL);
3041 * send ASCONF if parameters are pending and ASCONFs are
3042 * allowed (eg. addresses changed when init/cookie echo were
3045 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
3046 (stcb->asoc.asconf_supported == 1) &&
3047 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
3048 #ifdef SCTP_TIMER_BASED_ASCONF
3049 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
3050 stcb->sctp_ep, stcb,
3051 stcb->asoc.primary_destination);
3053 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
3054 SCTP_ADDR_NOT_LOCKED);
3059 /* Toss the cookie if I can */
3060 sctp_toss_old_cookies(stcb, asoc);
3061 if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3062 /* Restart the timer if we have pending data */
3063 struct sctp_tmit_chunk *chk;
3065 chk = TAILQ_FIRST(&asoc->sent_queue);
3066 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
3071 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
3072 struct sctp_tcb *stcb)
3074 struct sctp_nets *net;
3075 struct sctp_tmit_chunk *lchk;
3076 struct sctp_ecne_chunk bkup;
3077 uint8_t override_bit;
3078 uint32_t tsn, window_data_tsn;
3080 unsigned int pkt_cnt;
3082 len = ntohs(cp->ch.chunk_length);
3083 if ((len != sizeof(struct sctp_ecne_chunk)) &&
3084 (len != sizeof(struct old_sctp_ecne_chunk))) {
3087 if (len == sizeof(struct old_sctp_ecne_chunk)) {
3088 /* Its the old format */
3089 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
3090 bkup.num_pkts_since_cwr = htonl(1);
3093 SCTP_STAT_INCR(sctps_recvecne);
3094 tsn = ntohl(cp->tsn);
3095 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
3096 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
3098 window_data_tsn = stcb->asoc.sending_seq - 1;
3100 window_data_tsn = lchk->rec.data.tsn;
3103 /* Find where it was sent to if possible. */
3105 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
3106 if (lchk->rec.data.tsn == tsn) {
3108 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
3111 if (SCTP_TSN_GT(lchk->rec.data.tsn, tsn)) {
3117 * What to do. A previous send of a CWR was possibly lost.
3118 * See how old it is, we may have it marked on the actual
3121 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3122 if (tsn == net->last_cwr_tsn) {
3123 /* Found him, send it off */
3129 * If we reach here, we need to send a special CWR
3130 * that says hey, we did this a long time ago and
3131 * you lost the response.
3133 net = TAILQ_FIRST(&stcb->asoc.nets);
3138 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
3145 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
3146 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3148 * JRS - Use the congestion control given in the pluggable
3151 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
3153 * We reduce once every RTT. So we will only lower cwnd at
3154 * the next sending seq i.e. the window_data_tsn
3156 net->cwr_window_tsn = window_data_tsn;
3157 net->ecn_ce_pkt_cnt += pkt_cnt;
3158 net->lost_cnt = pkt_cnt;
3159 net->last_cwr_tsn = tsn;
3161 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
3162 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
3163 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3165 * Another loss in the same window update how many
3166 * marks/packets lost we have had.
3170 if (pkt_cnt > net->lost_cnt) {
3171 /* Should be the case */
3172 cnt = (pkt_cnt - net->lost_cnt);
3173 net->ecn_ce_pkt_cnt += cnt;
3175 net->lost_cnt = pkt_cnt;
3176 net->last_cwr_tsn = tsn;
3178 * Most CC functions will ignore this call, since we
3179 * are in-window yet of the initial CE the peer saw.
3181 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
3185 * We always send a CWR this way if our previous one was lost our
3186 * peer will get an update, or if it is not time again to reduce we
3187 * still get the cwr to the peer. Note we set the override when we
3188 * could not find the TSN on the chunk or the destination network.
3190 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
3194 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
3197 * Here we get a CWR from the peer. We must look in the outqueue and
3198 * make sure that we have a covered ECNE in the control chunk part.
3201 struct sctp_tmit_chunk *chk, *nchk;
3202 struct sctp_ecne_chunk *ecne;
3206 cwr_tsn = ntohl(cp->tsn);
3207 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
3208 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.control_send_queue, sctp_next, nchk) {
3209 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
3212 if ((override == 0) && (chk->whoTo != net)) {
3213 /* Must be from the right src unless override is set */
3216 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
3217 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
3218 /* this covers this ECNE, we can remove it */
3219 stcb->asoc.ecn_echo_cnt_onq--;
3220 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
3222 stcb->asoc.ctrl_queue_cnt--;
3223 sctp_m_freem(chk->data);
3225 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3226 if (override == 0) {
3234 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3235 struct sctp_tcb *stcb, struct sctp_nets *net)
3237 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3241 SCTPDBG(SCTP_DEBUG_INPUT2,
3242 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3246 /* process according to association state */
3247 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3248 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3249 SCTPDBG(SCTP_DEBUG_INPUT2,
3250 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3251 SCTP_TCB_UNLOCK(stcb);
3254 /* notify upper layer protocol */
3255 if (stcb->sctp_socket) {
3256 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3259 if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
3260 !TAILQ_EMPTY(&stcb->asoc.sent_queue) ||
3261 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
3262 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3265 /* stop the timer */
3266 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3267 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3268 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3270 SCTPDBG(SCTP_DEBUG_INPUT2,
3271 "sctp_handle_shutdown_complete: calls free-asoc\n");
3272 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3273 so = SCTP_INP_SO(stcb->sctp_ep);
3274 atomic_add_int(&stcb->asoc.refcnt, 1);
3275 SCTP_TCB_UNLOCK(stcb);
3276 SCTP_SOCKET_LOCK(so, 1);
3277 SCTP_TCB_LOCK(stcb);
3278 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3280 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3281 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3282 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3283 SCTP_SOCKET_UNLOCK(so, 1);
3289 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3290 struct sctp_nets *net, uint8_t flg)
3292 switch (desc->chunk_type) {
3294 /* find the tsn to resend (possibly */
3297 struct sctp_tmit_chunk *tp1;
3299 tsn = ntohl(desc->tsn_ifany);
3300 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3301 if (tp1->rec.data.tsn == tsn) {
3305 if (SCTP_TSN_GT(tp1->rec.data.tsn, tsn)) {
3313 * Do it the other way , aka without paying
3314 * attention to queue seq order.
3316 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3317 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3318 if (tp1->rec.data.tsn == tsn) {
3325 SCTP_STAT_INCR(sctps_pdrptsnnf);
3327 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3330 if (((flg & SCTP_BADCRC) == 0) &&
3331 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3334 if ((stcb->asoc.peers_rwnd == 0) &&
3335 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3336 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3339 if (stcb->asoc.peers_rwnd == 0 &&
3340 (flg & SCTP_FROM_MIDDLE_BOX)) {
3341 SCTP_STAT_INCR(sctps_pdrpdizrw);
3344 ddp = (uint8_t *)(mtod(tp1->data, caddr_t)+
3345 sizeof(struct sctp_data_chunk));
3349 for (iii = 0; iii < sizeof(desc->data_bytes);
3351 if (ddp[iii] != desc->data_bytes[iii]) {
3352 SCTP_STAT_INCR(sctps_pdrpbadd);
3360 * this guy had a RTO calculation
3361 * pending on it, cancel it
3363 if (tp1->whoTo->rto_needed == 0) {
3364 tp1->whoTo->rto_needed = 1;
3368 SCTP_STAT_INCR(sctps_pdrpmark);
3369 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3370 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3372 * mark it as if we were doing a FR, since
3373 * we will be getting gap ack reports behind
3374 * the info from the router.
3376 tp1->rec.data.doing_fast_retransmit = 1;
3378 * mark the tsn with what sequences can
3381 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3382 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3384 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
3387 /* restart the timer */
3388 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3390 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3391 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3394 /* fix counts and things */
3395 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3396 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3397 tp1->whoTo->flight_size,
3399 (uint32_t)(uintptr_t)stcb,
3402 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3403 sctp_flight_size_decrease(tp1);
3404 sctp_total_flight_decrease(stcb, tp1);
3406 tp1->sent = SCTP_DATAGRAM_RESEND;
3412 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3413 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3416 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3418 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3421 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3422 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3423 audit, stcb->asoc.sent_queue_retran_cnt);
3424 #ifndef SCTP_AUDITING_ENABLED
3425 stcb->asoc.sent_queue_retran_cnt = audit;
3433 struct sctp_tmit_chunk *asconf;
3435 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3437 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3442 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3443 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3444 asconf->sent = SCTP_DATAGRAM_RESEND;
3445 asconf->snd_count--;
3449 case SCTP_INITIATION:
3450 /* resend the INIT */
3451 stcb->asoc.dropped_special_cnt++;
3452 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3454 * If we can get it in, in a few attempts we do
3455 * this, otherwise we let the timer fire.
3457 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3459 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3460 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3463 case SCTP_SELECTIVE_ACK:
3464 case SCTP_NR_SELECTIVE_ACK:
3465 /* resend the sack */
3466 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3468 case SCTP_HEARTBEAT_REQUEST:
3469 /* resend a demand HB */
3470 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3472 * Only retransmit if we KNOW we wont destroy the
3475 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3479 sctp_send_shutdown(stcb, net);
3481 case SCTP_SHUTDOWN_ACK:
3482 sctp_send_shutdown_ack(stcb, net);
3484 case SCTP_COOKIE_ECHO:
3486 struct sctp_tmit_chunk *cookie;
3489 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3491 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3496 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3497 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3498 cookie->sent = SCTP_DATAGRAM_RESEND;
3499 sctp_stop_all_cookie_timers(stcb);
3503 case SCTP_COOKIE_ACK:
3504 sctp_send_cookie_ack(stcb);
3506 case SCTP_ASCONF_ACK:
3507 /* resend last asconf ack */
3508 sctp_send_asconf_ack(stcb);
3510 case SCTP_IFORWARD_CUM_TSN:
3511 case SCTP_FORWARD_CUM_TSN:
3512 send_forward_tsn(stcb, &stcb->asoc);
3514 /* can't do anything with these */
3515 case SCTP_PACKET_DROPPED:
3516 case SCTP_INITIATION_ACK: /* this should not happen */
3517 case SCTP_HEARTBEAT_ACK:
3518 case SCTP_ABORT_ASSOCIATION:
3519 case SCTP_OPERATION_ERROR:
3520 case SCTP_SHUTDOWN_COMPLETE:
3530 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3536 * We set things to 0xffffffff since this is the last delivered
3537 * sequence and we will be sending in 0 after the reset.
3540 if (number_entries) {
3541 for (i = 0; i < number_entries; i++) {
3542 temp = ntohs(list[i]);
3543 if (temp >= stcb->asoc.streamincnt) {
3546 stcb->asoc.strmin[temp].last_mid_delivered = 0xffffffff;
3550 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3551 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3554 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3558 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3563 if (number_entries > 0) {
3564 for (i = 0; i < number_entries; i++) {
3565 temp = ntohs(list[i]);
3566 if (temp >= stcb->asoc.streamoutcnt) {
3567 /* no such stream */
3570 stcb->asoc.strmout[temp].next_mid_ordered = 0;
3571 stcb->asoc.strmout[temp].next_mid_unordered = 0;
3574 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3575 stcb->asoc.strmout[i].next_mid_ordered = 0;
3576 stcb->asoc.strmout[i].next_mid_unordered = 0;
3579 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3583 sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3588 if (number_entries > 0) {
3589 for (i = 0; i < number_entries; i++) {
3590 temp = ntohs(list[i]);
3591 if (temp >= stcb->asoc.streamoutcnt) {
3592 /* no such stream */
3595 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3598 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3599 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3605 struct sctp_stream_reset_request *
3606 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3608 struct sctp_association *asoc;
3609 struct sctp_chunkhdr *ch;
3610 struct sctp_stream_reset_request *r;
3611 struct sctp_tmit_chunk *chk;
3615 if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
3616 asoc->stream_reset_outstanding = 0;
3619 if (stcb->asoc.str_reset == NULL) {
3620 asoc->stream_reset_outstanding = 0;
3623 chk = stcb->asoc.str_reset;
3624 if (chk->data == NULL) {
3628 /* he wants a copy of the chk pointer */
3631 clen = chk->send_size;
3632 ch = mtod(chk->data, struct sctp_chunkhdr *);
3633 r = (struct sctp_stream_reset_request *)(ch + 1);
3634 if (ntohl(r->request_seq) == seq) {
3638 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3639 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3640 /* move to the next one, there can only be a max of two */
3641 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3642 if (ntohl(r->request_seq) == seq) {
3646 /* that seq is not here */
3651 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3653 struct sctp_association *asoc;
3654 struct sctp_tmit_chunk *chk;
3657 chk = asoc->str_reset;
3661 asoc->str_reset = NULL;
3662 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3663 chk->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3664 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3665 asoc->ctrl_queue_cnt--;
3667 sctp_m_freem(chk->data);
3670 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3675 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3676 uint32_t seq, uint32_t action,
3677 struct sctp_stream_reset_response *respin)
3681 struct sctp_association *asoc = &stcb->asoc;
3682 struct sctp_tmit_chunk *chk;
3683 struct sctp_stream_reset_request *req_param;
3684 struct sctp_stream_reset_out_request *req_out_param;
3685 struct sctp_stream_reset_in_request *req_in_param;
3686 uint32_t number_entries;
3688 if (asoc->stream_reset_outstanding == 0) {
3692 if (seq == stcb->asoc.str_reset_seq_out) {
3693 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3694 if (req_param != NULL) {
3695 stcb->asoc.str_reset_seq_out++;
3696 type = ntohs(req_param->ph.param_type);
3697 lparam_len = ntohs(req_param->ph.param_length);
3698 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3701 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3702 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3703 asoc->stream_reset_out_is_outstanding = 0;
3704 if (asoc->stream_reset_outstanding)
3705 asoc->stream_reset_outstanding--;
3706 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3708 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3709 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3710 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3711 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3713 * Set it up so we don't stop
3716 asoc->stream_reset_outstanding++;
3717 stcb->asoc.str_reset_seq_out--;
3718 asoc->stream_reset_out_is_outstanding = 1;
3721 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3723 if (no_clear == 0) {
3724 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3726 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3727 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3728 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3729 if (asoc->stream_reset_outstanding)
3730 asoc->stream_reset_outstanding--;
3731 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3732 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3733 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3734 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3735 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3736 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3738 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3739 /* Ok we now may have more streams */
3742 num_stream = stcb->asoc.strm_pending_add_size;
3743 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3745 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3747 stcb->asoc.strm_pending_add_size = 0;
3748 if (asoc->stream_reset_outstanding)
3749 asoc->stream_reset_outstanding--;
3750 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3751 /* Put the new streams into effect */
3754 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3755 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3757 asoc->streamoutcnt += num_stream;
3758 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3759 } else 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);
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_ADD_IN_STREAMS) {
3767 if (asoc->stream_reset_outstanding)
3768 asoc->stream_reset_outstanding--;
3769 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3770 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3771 SCTP_STREAM_CHANGE_DENIED);
3772 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3773 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3774 SCTP_STREAM_CHANGE_FAILED);
3776 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3778 * a) Adopt the new in tsn.
3780 * c) Adopt the new out-tsn
3782 struct sctp_stream_reset_response_tsn *resp;
3783 struct sctp_forward_tsn_chunk fwdtsn;
3786 if (respin == NULL) {
3790 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3793 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3794 resp = (struct sctp_stream_reset_response_tsn *)respin;
3795 asoc->stream_reset_outstanding--;
3796 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3797 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3798 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3799 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3803 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3804 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3805 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3808 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3809 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3810 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3812 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3813 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3815 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3816 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3818 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3819 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3820 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3821 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3822 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3823 SCTP_ASSOC_RESET_DENIED);
3825 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3826 SCTP_ASSOC_RESET_FAILED);
3829 /* get rid of the request and get the request flags */
3830 if (asoc->stream_reset_outstanding == 0) {
3831 sctp_clean_up_stream_reset(stcb);
3835 if (asoc->stream_reset_outstanding == 0) {
3836 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3842 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3843 struct sctp_tmit_chunk *chk,
3844 struct sctp_stream_reset_in_request *req, int trunc)
3852 * peer wants me to send a str-reset to him for my outgoing seq's if
3855 struct sctp_association *asoc = &stcb->asoc;
3857 seq = ntohl(req->request_seq);
3858 if (asoc->str_reset_seq_in == seq) {
3859 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3860 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3861 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3863 /* Can't do it, since they exceeded our buffer size */
3864 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3865 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3866 len = ntohs(req->ph.param_length);
3867 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3868 if (number_entries) {
3869 for (i = 0; i < number_entries; i++) {
3870 temp = ntohs(req->list_of_streams[i]);
3871 if (temp >= stcb->asoc.streamoutcnt) {
3872 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3875 req->list_of_streams[i] = temp;
3877 for (i = 0; i < number_entries; i++) {
3878 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3879 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3884 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3885 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3886 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3889 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3891 /* Can't do it, since we have sent one out */
3892 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3895 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3896 asoc->str_reset_seq_in++;
3897 } else if (asoc->str_reset_seq_in - 1 == seq) {
3898 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3899 } else if (asoc->str_reset_seq_in - 2 == seq) {
3900 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3902 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3904 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3908 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3909 struct sctp_tmit_chunk *chk,
3910 struct sctp_stream_reset_tsn_request *req)
3912 /* reset all in and out and update the tsn */
3914 * A) reset my str-seq's on in and out. B) Select a receive next,
3915 * and set cum-ack to it. Also process this selected number as a
3916 * fwd-tsn as well. C) set in the response my next sending seq.
3918 struct sctp_forward_tsn_chunk fwdtsn;
3919 struct sctp_association *asoc = &stcb->asoc;
3923 seq = ntohl(req->request_seq);
3924 if (asoc->str_reset_seq_in == seq) {
3925 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3926 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3927 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3929 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3930 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3931 fwdtsn.ch.chunk_flags = 0;
3932 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3933 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3937 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3938 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3939 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3941 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3942 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3943 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3944 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3945 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3946 atomic_add_int(&asoc->sending_seq, 1);
3947 /* save off historical data for retrans */
3948 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3949 asoc->last_sending_seq[0] = asoc->sending_seq;
3950 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3951 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3952 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3953 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3954 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3955 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3957 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3958 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3959 asoc->str_reset_seq_in++;
3960 } else if (asoc->str_reset_seq_in - 1 == seq) {
3961 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3962 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3963 } else if (asoc->str_reset_seq_in - 2 == seq) {
3964 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3965 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3967 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3973 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3974 struct sctp_tmit_chunk *chk,
3975 struct sctp_stream_reset_out_request *req, int trunc)
3978 int number_entries, len;
3979 struct sctp_association *asoc = &stcb->asoc;
3981 seq = ntohl(req->request_seq);
3983 /* now if its not a duplicate we process it */
3984 if (asoc->str_reset_seq_in == seq) {
3985 len = ntohs(req->ph.param_length);
3986 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3988 * the sender is resetting, handle the list issue.. we must
3989 * a) verify if we can do the reset, if so no problem b) If
3990 * we can't do the reset we must copy the request. c) queue
3991 * it, and setup the data in processor to trigger it off
3992 * when needed and dequeue all the queued data.
3994 tsn = ntohl(req->send_reset_at_tsn);
3996 /* move the reset action back one */
3997 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3998 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3999 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4001 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4002 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
4003 /* we can do it now */
4004 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
4005 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4008 * we must queue it up and thus wait for the TSN's
4009 * to arrive that are at or before tsn
4011 struct sctp_stream_reset_list *liste;
4014 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
4015 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
4016 siz, SCTP_M_STRESET);
4017 if (liste == NULL) {
4018 /* gak out of memory */
4019 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4020 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4025 liste->number_entries = number_entries;
4026 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
4027 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
4028 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
4030 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4031 asoc->str_reset_seq_in++;
4032 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4034 * one seq back, just echo back last action since my
4035 * response was lost.
4037 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4038 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4040 * two seq back, just echo back last action since my
4041 * response was lost.
4043 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4045 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4050 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
4051 struct sctp_stream_reset_add_strm *str_add)
4054 * Peer is requesting to add more streams. If its within our
4055 * max-streams we will allow it.
4057 uint32_t num_stream, i;
4059 struct sctp_association *asoc = &stcb->asoc;
4060 struct sctp_queued_to_read *ctl, *nctl;
4062 /* Get the number. */
4063 seq = ntohl(str_add->request_seq);
4064 num_stream = ntohs(str_add->number_of_streams);
4065 /* Now what would be the new total? */
4066 if (asoc->str_reset_seq_in == seq) {
4067 num_stream += stcb->asoc.streamincnt;
4068 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4069 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4070 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4071 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
4072 (num_stream > 0xffff)) {
4073 /* We must reject it they ask for to many */
4075 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4077 /* Ok, we can do that :-) */
4078 struct sctp_stream_in *oldstrm;
4080 /* save off the old */
4081 oldstrm = stcb->asoc.strmin;
4082 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
4083 (num_stream * sizeof(struct sctp_stream_in)),
4085 if (stcb->asoc.strmin == NULL) {
4086 stcb->asoc.strmin = oldstrm;
4089 /* copy off the old data */
4090 for (i = 0; i < stcb->asoc.streamincnt; i++) {
4091 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
4092 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
4093 stcb->asoc.strmin[i].sid = i;
4094 stcb->asoc.strmin[i].last_mid_delivered = oldstrm[i].last_mid_delivered;
4095 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
4096 stcb->asoc.strmin[i].pd_api_started = oldstrm[i].pd_api_started;
4097 /* now anything on those queues? */
4098 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next_instrm, nctl) {
4099 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next_instrm);
4100 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next_instrm);
4102 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].uno_inqueue, next_instrm, nctl) {
4103 TAILQ_REMOVE(&oldstrm[i].uno_inqueue, ctl, next_instrm);
4104 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].uno_inqueue, ctl, next_instrm);
4107 /* Init the new streams */
4108 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
4109 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
4110 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
4111 stcb->asoc.strmin[i].sid = i;
4112 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
4113 stcb->asoc.strmin[i].pd_api_started = 0;
4114 stcb->asoc.strmin[i].delivery_started = 0;
4116 SCTP_FREE(oldstrm, SCTP_M_STRMI);
4117 /* update the size */
4118 stcb->asoc.streamincnt = num_stream;
4119 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4120 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
4122 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4123 asoc->str_reset_seq_in++;
4124 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4126 * one seq back, just echo back last action since my
4127 * response was lost.
4129 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4130 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4132 * two seq back, just echo back last action since my
4133 * response was lost.
4135 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4137 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4143 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
4144 struct sctp_stream_reset_add_strm *str_add)
4147 * Peer is requesting to add more streams. If its within our
4148 * max-streams we will allow it.
4150 uint16_t num_stream;
4152 struct sctp_association *asoc = &stcb->asoc;
4154 /* Get the number. */
4155 seq = ntohl(str_add->request_seq);
4156 num_stream = ntohs(str_add->number_of_streams);
4157 /* Now what would be the new total? */
4158 if (asoc->str_reset_seq_in == seq) {
4159 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4160 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4161 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4162 } else if (stcb->asoc.stream_reset_outstanding) {
4163 /* We must reject it we have something pending */
4164 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
4166 /* Ok, we can do that :-) */
4169 mychk = stcb->asoc.streamoutcnt;
4170 mychk += num_stream;
4171 if (mychk < 0x10000) {
4172 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4173 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
4174 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4177 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4180 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
4181 asoc->str_reset_seq_in++;
4182 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4184 * one seq back, just echo back last action since my
4185 * response was lost.
4187 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4188 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4190 * two seq back, just echo back last action since my
4191 * response was lost.
4193 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4195 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4200 __attribute__((noinline))
4203 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
4204 struct sctp_chunkhdr *ch_req)
4206 uint16_t remaining_length, param_len, ptype;
4207 struct sctp_paramhdr pstore;
4208 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
4212 struct sctp_tmit_chunk *chk;
4213 struct sctp_chunkhdr *ch;
4214 struct sctp_paramhdr *ph;
4218 /* now it may be a reset or a reset-response */
4219 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
4221 /* setup for adding the response */
4222 sctp_alloc_a_chunk(stcb, chk);
4226 chk->copy_by_ref = 0;
4227 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
4228 chk->rec.chunk_id.can_take_data = 0;
4230 chk->asoc = &stcb->asoc;
4231 chk->no_fr_allowed = 0;
4232 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
4233 chk->book_size_scale = 0;
4234 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
4235 if (chk->data == NULL) {
4238 sctp_m_freem(chk->data);
4241 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
4244 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
4246 /* setup chunk parameters */
4247 chk->sent = SCTP_DATAGRAM_UNSENT;
4251 ch = mtod(chk->data, struct sctp_chunkhdr *);
4252 ch->chunk_type = SCTP_STREAM_RESET;
4253 ch->chunk_flags = 0;
4254 ch->chunk_length = htons(chk->send_size);
4255 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4256 offset += sizeof(struct sctp_chunkhdr);
4257 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
4258 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *)&pstore);
4263 param_len = ntohs(ph->param_length);
4264 if ((param_len > remaining_length) ||
4265 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
4266 /* bad parameter length */
4269 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
4270 (uint8_t *)&cstore);
4275 ptype = ntohs(ph->param_type);
4277 if (param_len > sizeof(cstore)) {
4282 if (num_param > SCTP_MAX_RESET_PARAMS) {
4283 /* hit the max of parameters already sorry.. */
4286 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4287 struct sctp_stream_reset_out_request *req_out;
4289 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4292 req_out = (struct sctp_stream_reset_out_request *)ph;
4294 if (stcb->asoc.stream_reset_outstanding) {
4295 seq = ntohl(req_out->response_seq);
4296 if (seq == stcb->asoc.str_reset_seq_out) {
4298 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4301 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4302 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4303 struct sctp_stream_reset_add_strm *str_add;
4305 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4308 str_add = (struct sctp_stream_reset_add_strm *)ph;
4310 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4311 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4312 struct sctp_stream_reset_add_strm *str_add;
4314 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4317 str_add = (struct sctp_stream_reset_add_strm *)ph;
4319 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4320 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4321 struct sctp_stream_reset_in_request *req_in;
4324 req_in = (struct sctp_stream_reset_in_request *)ph;
4325 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4326 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4327 struct sctp_stream_reset_tsn_request *req_tsn;
4330 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4331 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4333 goto strres_nochunk;
4337 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4338 struct sctp_stream_reset_response *resp;
4341 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4344 resp = (struct sctp_stream_reset_response *)ph;
4345 seq = ntohl(resp->response_seq);
4346 result = ntohl(resp->result);
4347 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4349 goto strres_nochunk;
4354 offset += SCTP_SIZE32(param_len);
4355 if (remaining_length >= SCTP_SIZE32(param_len)) {
4356 remaining_length -= SCTP_SIZE32(param_len);
4358 remaining_length = 0;
4362 /* we have no response free the stuff */
4363 goto strres_nochunk;
4365 /* ok we have a chunk to link in */
4366 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4369 stcb->asoc.ctrl_queue_cnt++;
4374 * Handle a router or endpoints report of a packet loss, there are two ways
4375 * to handle this, either we get the whole packet and must disect it
4376 * ourselves (possibly with truncation and or corruption) or it is a summary
4377 * from a middle box that did the disectting for us.
4380 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4381 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4383 uint32_t bottle_bw, on_queue;
4387 struct sctp_chunk_desc desc;
4388 struct sctp_chunkhdr *ch;
4390 chlen = ntohs(cp->ch.chunk_length);
4391 chlen -= sizeof(struct sctp_pktdrop_chunk);
4392 /* XXX possible chlen underflow */
4395 if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)
4396 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4398 ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr));
4399 chlen -= sizeof(struct sctphdr);
4400 /* XXX possible chlen underflow */
4401 memset(&desc, 0, sizeof(desc));
4403 trunc_len = (uint16_t)ntohs(cp->trunc_len);
4404 if (trunc_len > limit) {
4408 /* now the chunks themselves */
4409 while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) {
4410 desc.chunk_type = ch->chunk_type;
4411 /* get amount we need to move */
4412 at = ntohs(ch->chunk_length);
4413 if (at < sizeof(struct sctp_chunkhdr)) {
4414 /* corrupt chunk, maybe at the end? */
4415 SCTP_STAT_INCR(sctps_pdrpcrupt);
4418 if (trunc_len == 0) {
4419 /* we are supposed to have all of it */
4421 /* corrupt skip it */
4422 SCTP_STAT_INCR(sctps_pdrpcrupt);
4426 /* is there enough of it left ? */
4427 if (desc.chunk_type == SCTP_DATA) {
4428 if (chlen < (sizeof(struct sctp_data_chunk) +
4429 sizeof(desc.data_bytes))) {
4433 if (chlen < sizeof(struct sctp_chunkhdr)) {
4438 if (desc.chunk_type == SCTP_DATA) {
4439 /* can we get out the tsn? */
4440 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4441 SCTP_STAT_INCR(sctps_pdrpmbda);
4443 if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) {
4445 struct sctp_data_chunk *dcp;
4449 dcp = (struct sctp_data_chunk *)ch;
4450 ddp = (uint8_t *)(dcp + 1);
4451 for (iii = 0; iii < sizeof(desc.data_bytes); iii++) {
4452 desc.data_bytes[iii] = ddp[iii];
4454 desc.tsn_ifany = dcp->dp.tsn;
4456 /* nope we are done. */
4457 SCTP_STAT_INCR(sctps_pdrpnedat);
4461 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4462 SCTP_STAT_INCR(sctps_pdrpmbct);
4465 if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) {
4466 SCTP_STAT_INCR(sctps_pdrppdbrk);
4469 if (SCTP_SIZE32(at) > chlen) {
4472 chlen -= SCTP_SIZE32(at);
4473 if (chlen < sizeof(struct sctp_chunkhdr)) {
4474 /* done, none left */
4477 ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at));
4479 /* Now update any rwnd --- possibly */
4480 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4481 /* From a peer, we get a rwnd report */
4484 SCTP_STAT_INCR(sctps_pdrpfehos);
4486 bottle_bw = ntohl(cp->bottle_bw);
4487 on_queue = ntohl(cp->current_onq);
4488 if (bottle_bw && on_queue) {
4489 /* a rwnd report is in here */
4490 if (bottle_bw > on_queue)
4491 a_rwnd = bottle_bw - on_queue;
4496 stcb->asoc.peers_rwnd = 0;
4498 if (a_rwnd > stcb->asoc.total_flight) {
4499 stcb->asoc.peers_rwnd =
4500 a_rwnd - stcb->asoc.total_flight;
4502 stcb->asoc.peers_rwnd = 0;
4504 if (stcb->asoc.peers_rwnd <
4505 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4506 /* SWS sender side engages */
4507 stcb->asoc.peers_rwnd = 0;
4512 SCTP_STAT_INCR(sctps_pdrpfmbox);
4515 /* now middle boxes in sat networks get a cwnd bump */
4516 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) &&
4517 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4518 (stcb->asoc.sat_network)) {
4520 * This is debatable but for sat networks it makes sense
4521 * Note if a T3 timer has went off, we will prohibit any
4522 * changes to cwnd until we exit the t3 loss recovery.
4524 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4525 net, cp, &bottle_bw, &on_queue);
4530 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4531 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4532 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4533 * length of the complete packet outputs: - length: modified to remaining
4534 * length after control processing - netp: modified to new sctp_nets after
4535 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4536 * bad packet,...) otherwise return the tcb for this packet
4539 __attribute__((noinline))
4541 static struct sctp_tcb *
4542 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4543 struct sockaddr *src, struct sockaddr *dst,
4544 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4545 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4546 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4547 uint32_t vrf_id, uint16_t port)
4549 struct sctp_association *asoc;
4550 struct mbuf *op_err;
4551 char msg[SCTP_DIAG_INFO_LEN];
4553 int num_chunks = 0; /* number of control chunks processed */
4554 uint32_t chk_length, contiguous;
4556 int abort_no_unlock = 0;
4560 * How big should this be, and should it be alloc'd? Lets try the
4561 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4562 * until we get into jumbo grams and such..
4564 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4566 uint32_t auth_offset = 0, auth_len = 0;
4567 int auth_skipped = 0;
4569 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4573 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4574 iphlen, *offset, length, (void *)stcb);
4577 SCTP_TCB_LOCK_ASSERT(stcb);
4579 /* validate chunk header length... */
4580 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4581 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4582 ntohs(ch->chunk_length));
4587 * validate the verification tag
4589 vtag_in = ntohl(sh->v_tag);
4591 if (ch->chunk_type == SCTP_INITIATION) {
4592 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4593 ntohs(ch->chunk_length), vtag_in);
4595 /* protocol error- silently discard... */
4596 SCTP_STAT_INCR(sctps_badvtag);
4598 SCTP_TCB_UNLOCK(stcb);
4602 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4604 * If there is no stcb, skip the AUTH chunk and process
4605 * later after a stcb is found (to validate the lookup was
4608 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4610 (inp->auth_supported == 1)) {
4611 /* save this chunk for later processing */
4613 auth_offset = *offset;
4614 auth_len = ntohs(ch->chunk_length);
4616 /* (temporarily) move past this chunk */
4617 *offset += SCTP_SIZE32(auth_len);
4618 if (*offset >= length) {
4619 /* no more data left in the mbuf chain */
4623 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4624 sizeof(struct sctp_chunkhdr), chunk_buf);
4631 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4632 goto process_control_chunks;
4635 * first check if it's an ASCONF with an unknown src addr we
4636 * need to look inside to find the association
4638 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4639 struct sctp_chunkhdr *asconf_ch = ch;
4640 uint32_t asconf_offset = 0, asconf_len = 0;
4642 /* inp's refcount may be reduced */
4643 SCTP_INP_INCR_REF(inp);
4645 asconf_offset = *offset;
4647 asconf_len = ntohs(asconf_ch->chunk_length);
4648 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4650 stcb = sctp_findassociation_ep_asconf(m,
4653 sh, &inp, netp, vrf_id);
4656 asconf_offset += SCTP_SIZE32(asconf_len);
4657 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4658 sizeof(struct sctp_chunkhdr), chunk_buf);
4659 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4662 * reduce inp's refcount if not reduced in
4663 * sctp_findassociation_ep_asconf().
4665 SCTP_INP_DECR_REF(inp);
4668 /* now go back and verify any auth chunk to be sure */
4669 if (auth_skipped && (stcb != NULL)) {
4670 struct sctp_auth_chunk *auth;
4672 auth = (struct sctp_auth_chunk *)
4673 sctp_m_getptr(m, auth_offset,
4674 auth_len, chunk_buf);
4677 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4679 /* auth HMAC failed so dump it */
4683 /* remaining chunks are HMAC checked */
4684 stcb->asoc.authenticated = 1;
4689 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4690 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4692 /* no association, so it's out of the blue... */
4693 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4694 mflowtype, mflowid, inp->fibnum,
4700 /* ABORT and SHUTDOWN can use either v_tag... */
4701 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4702 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4703 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4704 /* Take the T-bit always into account. */
4705 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4706 (vtag_in == asoc->my_vtag)) ||
4707 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4708 (asoc->peer_vtag != htonl(0)) &&
4709 (vtag_in == asoc->peer_vtag))) {
4712 /* drop this packet... */
4713 SCTP_STAT_INCR(sctps_badvtag);
4715 SCTP_TCB_UNLOCK(stcb);
4719 } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
4720 if (vtag_in != asoc->my_vtag) {
4722 * this could be a stale SHUTDOWN-ACK or the
4723 * peer never got the SHUTDOWN-COMPLETE and
4724 * is still hung; we have started a new asoc
4725 * but it won't complete until the shutdown
4729 SCTP_TCB_UNLOCK(stcb);
4731 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4732 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4734 sctp_handle_ootb(m, iphlen, *offset, src, dst,
4736 mflowtype, mflowid, fibnum,
4741 /* for all other chunks, vtag must match */
4742 if (vtag_in != asoc->my_vtag) {
4743 /* invalid vtag... */
4744 SCTPDBG(SCTP_DEBUG_INPUT3,
4745 "invalid vtag: %xh, expect %xh\n",
4746 vtag_in, asoc->my_vtag);
4747 SCTP_STAT_INCR(sctps_badvtag);
4749 SCTP_TCB_UNLOCK(stcb);
4755 } /* end if !SCTP_COOKIE_ECHO */
4757 * process all control chunks...
4759 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4760 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4761 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4762 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
4763 /* implied cookie-ack.. we must have lost the ack */
4764 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4768 process_control_chunks:
4769 while (IS_SCTP_CONTROL(ch)) {
4770 /* validate chunk length */
4771 chk_length = ntohs(ch->chunk_length);
4772 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4773 ch->chunk_type, chk_length);
4774 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4775 if (chk_length < sizeof(*ch) ||
4776 (*offset + (int)chk_length) > length) {
4780 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4782 * INIT and INIT-ACK only gets the init ack "header" portion
4783 * only because we don't have to process the peer's COOKIE.
4784 * All others get a complete chunk.
4786 switch (ch->chunk_type) {
4787 case SCTP_INITIATION:
4788 contiguous = sizeof(struct sctp_init_chunk);
4790 case SCTP_INITIATION_ACK:
4791 contiguous = sizeof(struct sctp_init_ack_chunk);
4794 contiguous = min(chk_length, sizeof(chunk_buf));
4797 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4803 SCTP_TCB_UNLOCK(stcb);
4809 /* Save off the last place we got a control from */
4811 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4813 * allow last_control to be NULL if
4814 * ASCONF... ASCONF processing will find the
4817 if ((netp != NULL) && (*netp != NULL))
4818 stcb->asoc.last_control_chunk_from = *netp;
4821 #ifdef SCTP_AUDITING_ENABLED
4822 sctp_audit_log(0xB0, ch->chunk_type);
4825 /* check to see if this chunk required auth, but isn't */
4826 if ((stcb != NULL) &&
4827 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4828 !stcb->asoc.authenticated) {
4829 /* "silently" ignore */
4830 SCTP_STAT_INCR(sctps_recvauthmissing);
4833 switch (ch->chunk_type) {
4834 case SCTP_INITIATION:
4835 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4836 /* The INIT chunk must be the only chunk. */
4837 if ((num_chunks > 1) ||
4838 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4839 /* RFC 4960 requires that no ABORT is sent */
4842 SCTP_TCB_UNLOCK(stcb);
4846 /* Honor our resource limit. */
4847 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4848 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4849 sctp_abort_association(inp, stcb, m, iphlen,
4850 src, dst, sh, op_err,
4856 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4857 (struct sctp_init_chunk *)ch, inp,
4858 stcb, *netp, &abort_no_unlock,
4862 if ((!abort_no_unlock) && (stcb != NULL)) {
4863 SCTP_TCB_UNLOCK(stcb);
4867 case SCTP_PAD_CHUNK:
4869 case SCTP_INITIATION_ACK:
4870 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT_ACK\n");
4871 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4872 /* We are not interested anymore */
4873 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size)) {
4878 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4879 so = SCTP_INP_SO(inp);
4880 atomic_add_int(&stcb->asoc.refcnt, 1);
4881 SCTP_TCB_UNLOCK(stcb);
4882 SCTP_SOCKET_LOCK(so, 1);
4883 SCTP_TCB_LOCK(stcb);
4884 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4886 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4887 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4888 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4889 SCTP_SOCKET_UNLOCK(so, 1);
4895 /* The INIT-ACK chunk must be the only chunk. */
4896 if ((num_chunks > 1) ||
4897 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4901 if ((netp != NULL) && (*netp != NULL)) {
4902 ret = sctp_handle_init_ack(m, iphlen, *offset,
4904 (struct sctp_init_ack_chunk *)ch,
4913 if (abort_no_unlock) {
4917 * Special case, I must call the output routine to
4918 * get the cookie echoed
4920 if ((stcb != NULL) && (ret == 0)) {
4921 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4925 case SCTP_SELECTIVE_ACK:
4926 case SCTP_NR_SELECTIVE_ACK:
4929 uint32_t a_rwnd, cum_ack;
4930 uint16_t num_seg, num_nr_seg, num_dup;
4932 int offset_seg, offset_dup;
4934 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
4935 ch->chunk_type == SCTP_SELECTIVE_ACK ? "SCTP_SACK" : "SCTP_NR_SACK");
4936 SCTP_STAT_INCR(sctps_recvsacks);
4938 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing %s chunk\n",
4939 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK");
4942 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4943 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4944 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4948 if (stcb->asoc.nrsack_supported == 0) {
4951 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4952 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR_SACK chunk, too small\n");
4956 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4958 * If we have sent a shutdown-ack, we will pay no
4959 * attention to a sack sent in to us since
4960 * we don't care anymore.
4964 flags = ch->chunk_flags;
4965 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4966 struct sctp_sack_chunk *sack;
4968 sack = (struct sctp_sack_chunk *)ch;
4969 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4970 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4972 num_dup = ntohs(sack->sack.num_dup_tsns);
4973 a_rwnd = ntohl(sack->sack.a_rwnd);
4974 if (sizeof(struct sctp_sack_chunk) +
4975 num_seg * sizeof(struct sctp_gap_ack_block) +
4976 num_dup * sizeof(uint32_t) != chk_length) {
4977 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4980 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4981 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4983 struct sctp_nr_sack_chunk *nr_sack;
4985 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4986 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4987 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4988 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4989 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4990 a_rwnd = ntohl(nr_sack->nr_sack.a_rwnd);
4991 if (sizeof(struct sctp_nr_sack_chunk) +
4992 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4993 num_dup * sizeof(uint32_t) != chk_length) {
4994 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
4997 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
4998 offset_dup = offset_seg + (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block);
5000 SCTPDBG(SCTP_DEBUG_INPUT3, "%s process cum_ack:%x num_seg:%d a_rwnd:%d\n",
5001 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK",
5002 cum_ack, num_seg, a_rwnd);
5003 stcb->asoc.seen_a_sack_this_pkt = 1;
5004 if ((stcb->asoc.pr_sctp_cnt == 0) &&
5005 (num_seg == 0) && (num_nr_seg == 0) &&
5006 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
5007 (stcb->asoc.saw_sack_with_frags == 0) &&
5008 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
5009 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
5011 * We have a SIMPLE sack having no
5012 * prior segments and data on sent
5013 * queue to be acked. Use the faster
5014 * path sack processing. We also
5015 * allow window update sacks with no
5016 * missing segments to go this way
5019 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
5020 &abort_now, ecne_seen);
5022 if ((netp != NULL) && (*netp != NULL)) {
5023 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
5024 num_seg, num_nr_seg, num_dup, &abort_now, flags,
5025 cum_ack, a_rwnd, ecne_seen);
5029 /* ABORT signal from sack processing */
5033 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
5034 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
5035 (stcb->asoc.stream_queue_cnt == 0)) {
5036 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
5040 case SCTP_HEARTBEAT_REQUEST:
5041 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
5042 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5043 SCTP_STAT_INCR(sctps_recvheartbeat);
5044 sctp_send_heartbeat_ack(stcb, m, *offset,
5048 case SCTP_HEARTBEAT_ACK:
5049 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT_ACK\n");
5050 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
5055 SCTP_STAT_INCR(sctps_recvheartbeatack);
5056 if ((netp != NULL) && (*netp != NULL)) {
5057 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
5061 case SCTP_ABORT_ASSOCIATION:
5062 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
5065 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5066 if (sctp_handle_abort((struct sctp_abort_chunk *)ch, stcb, *netp)) {
5076 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
5078 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
5082 if ((netp != NULL) && (*netp != NULL)) {
5085 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
5086 stcb, *netp, &abort_flag);
5093 case SCTP_SHUTDOWN_ACK:
5094 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_ACK, stcb %p\n", (void *)stcb);
5095 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5096 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
5101 case SCTP_OPERATION_ERROR:
5102 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP_ERR\n");
5103 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL) &&
5104 sctp_handle_error(ch, stcb, *netp, contiguous) < 0) {
5109 case SCTP_COOKIE_ECHO:
5110 SCTPDBG(SCTP_DEBUG_INPUT3,
5111 "SCTP_COOKIE_ECHO, stcb %p\n", (void *)stcb);
5112 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size > 0)) {
5115 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5116 /* We are not interested anymore */
5119 SCTP_TCB_UNLOCK(stcb);
5126 * First are we accepting? We do this again here
5127 * since it is possible that a previous endpoint WAS
5128 * listening responded to a INIT-ACK and then
5129 * closed. We opened and bound.. and are now no
5132 * XXXGL: notes on checking listen queue length.
5133 * 1) SCTP_IS_LISTENING() doesn't necessarily mean
5134 * SOLISTENING(), because a listening "UDP type"
5135 * socket isn't listening in terms of the socket
5136 * layer. It is a normal data flow socket, that
5137 * can fork off new connections. Thus, we should
5138 * look into sol_qlen only in case we are !UDP.
5139 * 2) Checking sol_qlen in general requires locking
5140 * the socket, and this code lacks that.
5142 if ((stcb == NULL) &&
5143 (!SCTP_IS_LISTENING(inp) ||
5144 (!(inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) &&
5145 inp->sctp_socket->sol_qlen >= inp->sctp_socket->sol_qlimit))) {
5146 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
5147 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
5148 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
5149 sctp_abort_association(inp, stcb, m, iphlen,
5150 src, dst, sh, op_err,
5157 struct mbuf *ret_buf;
5158 struct sctp_inpcb *linp;
5167 SCTP_ASOC_CREATE_LOCK(linp);
5168 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
5169 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
5170 SCTP_ASOC_CREATE_UNLOCK(linp);
5176 struct sctp_tcb *locked_stcb;
5180 sctp_handle_cookie_echo(m, iphlen,
5184 (struct sctp_cookie_echo_chunk *)ch,
5194 if ((locked_stcb != NULL) && (locked_stcb != stcb)) {
5195 SCTP_TCB_UNLOCK(locked_stcb);
5198 SCTP_TCB_LOCK_ASSERT(stcb);
5204 SCTP_ASOC_CREATE_UNLOCK(linp);
5206 if (ret_buf == NULL) {
5208 SCTP_TCB_UNLOCK(stcb);
5210 SCTPDBG(SCTP_DEBUG_INPUT3,
5211 "GAK, null buffer\n");
5215 /* if AUTH skipped, see if it verified... */
5220 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
5222 * Restart the timer if we have
5225 struct sctp_tmit_chunk *chk;
5227 chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
5228 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
5232 case SCTP_COOKIE_ACK:
5233 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE_ACK, stcb %p\n", (void *)stcb);
5234 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
5237 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5238 /* We are not interested anymore */
5239 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
5242 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5243 so = SCTP_INP_SO(inp);
5244 atomic_add_int(&stcb->asoc.refcnt, 1);
5245 SCTP_TCB_UNLOCK(stcb);
5246 SCTP_SOCKET_LOCK(so, 1);
5247 SCTP_TCB_LOCK(stcb);
5248 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5250 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5251 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
5252 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5253 SCTP_SOCKET_UNLOCK(so, 1);
5259 if ((netp != NULL) && (*netp != NULL)) {
5260 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
5264 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_ECHO\n");
5265 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_ecne_chunk))) {
5270 if (stcb->asoc.ecn_supported == 0) {
5273 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, stcb);
5277 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_CWR\n");
5278 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_cwr_chunk))) {
5282 if (stcb->asoc.ecn_supported == 0) {
5285 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5287 case SCTP_SHUTDOWN_COMPLETE:
5288 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_COMPLETE, stcb %p\n", (void *)stcb);
5289 /* must be first and only chunk */
5290 if ((num_chunks > 1) ||
5291 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5295 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5296 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5303 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5305 if (stcb->asoc.asconf_supported == 0) {
5308 sctp_handle_asconf(m, *offset, src,
5309 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5313 case SCTP_ASCONF_ACK:
5314 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF_ACK\n");
5315 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5320 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5321 if (stcb->asoc.asconf_supported == 0) {
5324 /* He's alive so give him credit */
5325 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5326 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5327 stcb->asoc.overall_error_count,
5329 SCTP_FROM_SCTP_INPUT,
5332 stcb->asoc.overall_error_count = 0;
5333 sctp_handle_asconf_ack(m, *offset,
5334 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5335 if (abort_no_unlock)
5339 case SCTP_FORWARD_CUM_TSN:
5340 case SCTP_IFORWARD_CUM_TSN:
5341 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_FWD_TSN\n");
5342 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5351 if (stcb->asoc.prsctp_supported == 0) {
5355 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5356 /* We are not interested anymore */
5357 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5358 so = SCTP_INP_SO(inp);
5359 atomic_add_int(&stcb->asoc.refcnt, 1);
5360 SCTP_TCB_UNLOCK(stcb);
5361 SCTP_SOCKET_LOCK(so, 1);
5362 SCTP_TCB_LOCK(stcb);
5363 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5365 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5366 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5367 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5368 SCTP_SOCKET_UNLOCK(so, 1);
5374 * For sending a SACK this looks like DATA
5377 stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
5378 sctp_handle_forward_tsn(stcb,
5379 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5386 case SCTP_STREAM_RESET:
5387 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5388 if (((stcb == NULL) || (ch == NULL) || (chk_length < sizeof(struct sctp_stream_reset_tsn_req)))) {
5393 if (stcb->asoc.reconfig_supported == 0) {
5396 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5397 /* stop processing */
5402 case SCTP_PACKET_DROPPED:
5403 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5404 /* re-get it all please */
5405 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5411 if ((ch != NULL) && (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5412 if (stcb->asoc.pktdrop_supported == 0) {
5415 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5417 min(chk_length, contiguous));
5420 case SCTP_AUTHENTICATION:
5421 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5423 /* save the first AUTH for later processing */
5424 if (auth_skipped == 0) {
5425 auth_offset = *offset;
5426 auth_len = chk_length;
5429 /* skip this chunk (temporarily) */
5432 if (stcb->asoc.auth_supported == 0) {
5435 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5436 (chk_length > (sizeof(struct sctp_auth_chunk) +
5437 SCTP_AUTH_DIGEST_LEN_MAX))) {
5442 if (got_auth == 1) {
5443 /* skip this chunk... it's already auth'd */
5447 if ((ch == NULL) || sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch,
5449 /* auth HMAC failed so dump the packet */
5453 /* remaining chunks are HMAC checked */
5454 stcb->asoc.authenticated = 1;
5460 /* it's an unknown chunk! */
5461 if ((ch->chunk_type & 0x40) && (stcb != NULL)) {
5462 struct sctp_gen_error_cause *cause;
5465 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
5466 0, M_NOWAIT, 1, MT_DATA);
5467 if (op_err != NULL) {
5468 len = min(SCTP_SIZE32(chk_length), (uint32_t)(length - *offset));
5469 cause = mtod(op_err, struct sctp_gen_error_cause *);
5470 cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5471 cause->length = htons((uint16_t)(len + sizeof(struct sctp_gen_error_cause)));
5472 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5473 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5474 if (SCTP_BUF_NEXT(op_err) != NULL) {
5475 #ifdef SCTP_MBUF_LOGGING
5476 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5477 sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
5480 sctp_queue_op_err(stcb, op_err);
5482 sctp_m_freem(op_err);
5486 if ((ch->chunk_type & 0x80) == 0) {
5487 /* discard this packet */
5490 } /* else skip this bad chunk and continue... */
5492 } /* switch (ch->chunk_type) */
5496 /* get the next chunk */
5497 *offset += SCTP_SIZE32(chk_length);
5498 if (*offset >= length) {
5499 /* no more data left in the mbuf chain */
5502 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5503 sizeof(struct sctp_chunkhdr), chunk_buf);
5510 if ((asconf_cnt > 0) && (stcb != NULL)) {
5511 sctp_send_asconf_ack(stcb);
5518 * common input chunk processing (v4 and v6)
5521 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5522 struct sockaddr *src, struct sockaddr *dst,
5523 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5524 uint8_t compute_crc,
5526 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5527 uint32_t vrf_id, uint16_t port)
5530 int fwd_tsn_seen = 0, data_processed = 0;
5531 struct mbuf *m = *mm, *op_err;
5532 char msg[SCTP_DIAG_INFO_LEN];
5534 int cnt_ctrl_ready = 0;
5535 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5536 struct sctp_tcb *stcb = NULL;
5537 struct sctp_nets *net = NULL;
5539 SCTP_STAT_INCR(sctps_recvdatagrams);
5540 #ifdef SCTP_AUDITING_ENABLED
5541 sctp_audit_log(0xE0, 1);
5542 sctp_auditing(0, inp, stcb, net);
5544 if (compute_crc != 0) {
5545 uint32_t check, calc_check;
5547 check = sh->checksum;
5549 calc_check = sctp_calculate_cksum(m, iphlen);
5550 sh->checksum = check;
5551 if (calc_check != check) {
5552 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5553 calc_check, check, (void *)m, length, iphlen);
5554 stcb = sctp_findassociation_addr(m, offset, src, dst,
5555 sh, ch, &inp, &net, vrf_id);
5556 #if defined(INET) || defined(INET6)
5557 if ((ch->chunk_type != SCTP_INITIATION) &&
5558 (net != NULL) && (net->port != port)) {
5559 if (net->port == 0) {
5560 /* UDP encapsulation turned on. */
5561 net->mtu -= sizeof(struct udphdr);
5562 if (stcb->asoc.smallest_mtu > net->mtu) {
5563 sctp_pathmtu_adjustment(stcb, net->mtu);
5565 } else if (port == 0) {
5566 /* UDP encapsulation turned off. */
5567 net->mtu += sizeof(struct udphdr);
5568 /* XXX Update smallest_mtu */
5574 net->flowtype = mflowtype;
5575 net->flowid = mflowid;
5577 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5578 if ((inp != NULL) && (stcb != NULL)) {
5579 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5580 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5581 } else if ((inp != NULL) && (stcb == NULL)) {
5584 SCTP_STAT_INCR(sctps_badsum);
5585 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5589 /* Destination port of 0 is illegal, based on RFC4960. */
5590 if (sh->dest_port == 0) {
5591 SCTP_STAT_INCR(sctps_hdrops);
5594 stcb = sctp_findassociation_addr(m, offset, src, dst,
5595 sh, ch, &inp, &net, vrf_id);
5596 #if defined(INET) || defined(INET6)
5597 if ((ch->chunk_type != SCTP_INITIATION) &&
5598 (net != NULL) && (net->port != port)) {
5599 if (net->port == 0) {
5600 /* UDP encapsulation turned on. */
5601 net->mtu -= sizeof(struct udphdr);
5602 if (stcb->asoc.smallest_mtu > net->mtu) {
5603 sctp_pathmtu_adjustment(stcb, net->mtu);
5605 } else if (port == 0) {
5606 /* UDP encapsulation turned off. */
5607 net->mtu += sizeof(struct udphdr);
5608 /* XXX Update smallest_mtu */
5614 net->flowtype = mflowtype;
5615 net->flowid = mflowid;
5618 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5619 SCTP_STAT_INCR(sctps_noport);
5620 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5623 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5624 sctp_send_shutdown_complete2(src, dst, sh,
5625 mflowtype, mflowid, fibnum,
5629 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5632 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5633 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5634 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5635 (ch->chunk_type != SCTP_INIT))) {
5636 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5638 sctp_send_abort(m, iphlen, src, dst,
5640 mflowtype, mflowid, fibnum,
5645 } else if (stcb == NULL) {
5648 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5649 (void *)m, iphlen, offset, length, (void *)stcb);
5651 /* always clear this before beginning a packet */
5652 stcb->asoc.authenticated = 0;
5653 stcb->asoc.seen_a_sack_this_pkt = 0;
5654 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5655 (void *)stcb, stcb->asoc.state);
5657 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5658 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5660 * If we hit here, we had a ref count
5661 * up when the assoc was aborted and the
5662 * timer is clearing out the assoc, we should
5663 * NOT respond to any packet.. its OOTB.
5665 SCTP_TCB_UNLOCK(stcb);
5667 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5668 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5669 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5671 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5672 mflowtype, mflowid, inp->fibnum,
5677 if (IS_SCTP_CONTROL(ch)) {
5678 /* process the control portion of the SCTP packet */
5679 /* sa_ignore NO_NULL_CHK */
5680 stcb = sctp_process_control(m, iphlen, &offset, length,
5682 inp, stcb, &net, &fwd_tsn_seen,
5683 mflowtype, mflowid, fibnum,
5687 * This covers us if the cookie-echo was there and
5688 * it changes our INP.
5690 inp = stcb->sctp_ep;
5691 #if defined(INET) || defined(INET6)
5692 if ((ch->chunk_type != SCTP_INITIATION) &&
5693 (net != NULL) && (net->port != port)) {
5694 if (net->port == 0) {
5695 /* UDP encapsulation turned on. */
5696 net->mtu -= sizeof(struct udphdr);
5697 if (stcb->asoc.smallest_mtu > net->mtu) {
5698 sctp_pathmtu_adjustment(stcb, net->mtu);
5700 } else if (port == 0) {
5701 /* UDP encapsulation turned off. */
5702 net->mtu += sizeof(struct udphdr);
5703 /* XXX Update smallest_mtu */
5711 * no control chunks, so pre-process DATA chunks (these
5712 * checks are taken care of by control processing)
5716 * if DATA only packet, and auth is required, then punt...
5717 * can't have authenticated without any AUTH (control)
5720 if ((stcb != NULL) &&
5721 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5722 /* "silently" ignore */
5723 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5724 SCTP_STAT_INCR(sctps_recvauthmissing);
5728 /* out of the blue DATA chunk */
5729 SCTP_PROBE5(receive, NULL, NULL, m, NULL, sh);
5730 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5731 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5733 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5734 mflowtype, mflowid, fibnum,
5738 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5739 /* v_tag mismatch! */
5740 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5741 SCTP_STAT_INCR(sctps_badvtag);
5746 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5749 * no valid TCB for this packet, or we found it's a bad
5750 * packet while processing control, or we're done with this
5751 * packet (done or skip rest of data), so we drop it...
5757 * DATA chunk processing
5759 /* plow through the data chunks while length > offset */
5762 * Rest should be DATA only. Check authentication state if AUTH for
5765 if ((length > offset) &&
5767 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5768 !stcb->asoc.authenticated) {
5769 /* "silently" ignore */
5770 SCTP_STAT_INCR(sctps_recvauthmissing);
5771 SCTPDBG(SCTP_DEBUG_AUTH1,
5772 "Data chunk requires AUTH, skipped\n");
5775 if (length > offset) {
5779 * First check to make sure our state is correct. We would
5780 * not get here unless we really did have a tag, so we don't
5781 * abort if this happens, just dump the chunk silently.
5783 switch (SCTP_GET_STATE(stcb)) {
5784 case SCTP_STATE_COOKIE_ECHOED:
5786 * we consider data with valid tags in this state
5787 * shows us the cookie-ack was lost. Imply it was
5790 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5792 case SCTP_STATE_COOKIE_WAIT:
5794 * We consider OOTB any data sent during asoc setup.
5796 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5797 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5799 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5800 mflowtype, mflowid, inp->fibnum,
5803 /* sa_ignore NOTREACHED */
5805 case SCTP_STATE_EMPTY: /* should not happen */
5806 case SCTP_STATE_INUSE: /* should not happen */
5807 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5808 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5811 /* sa_ignore NOTREACHED */
5813 case SCTP_STATE_OPEN:
5814 case SCTP_STATE_SHUTDOWN_SENT:
5817 /* plow through the data chunks while length > offset */
5818 retval = sctp_process_data(mm, iphlen, &offset, length,
5819 inp, stcb, net, &high_tsn);
5822 * The association aborted, NO UNLOCK needed since
5823 * the association is destroyed.
5830 * Anything important needs to have been m_copy'ed in
5835 /* take care of ecn */
5836 if ((data_processed == 1) &&
5837 (stcb->asoc.ecn_supported == 1) &&
5838 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5839 /* Yep, we need to add a ECNE */
5840 sctp_send_ecn_echo(stcb, net, high_tsn);
5843 if ((data_processed == 0) && (fwd_tsn_seen)) {
5845 uint32_t highest_tsn;
5847 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5848 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5850 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5852 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5853 stcb->asoc.send_sack = 1;
5854 sctp_sack_check(stcb, was_a_gap);
5855 } else if (fwd_tsn_seen) {
5856 stcb->asoc.send_sack = 1;
5858 /* trigger send of any chunks in queue... */
5860 #ifdef SCTP_AUDITING_ENABLED
5861 sctp_audit_log(0xE0, 2);
5862 sctp_auditing(1, inp, stcb, net);
5864 SCTPDBG(SCTP_DEBUG_INPUT1,
5865 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5866 stcb->asoc.peers_rwnd,
5867 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5868 stcb->asoc.total_flight);
5869 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5870 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5871 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5873 if (!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue) ||
5875 stcb->asoc.trigger_reset ||
5877 (stcb->asoc.peers_rwnd > 0 ||
5878 (stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) {
5879 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5880 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5881 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5883 #ifdef SCTP_AUDITING_ENABLED
5884 sctp_audit_log(0xE0, 3);
5885 sctp_auditing(2, inp, stcb, net);
5889 SCTP_TCB_UNLOCK(stcb);
5891 if (inp_decr != NULL) {
5892 /* reduce ref-count */
5893 SCTP_INP_WLOCK(inp_decr);
5894 SCTP_INP_DECR_REF(inp_decr);
5895 SCTP_INP_WUNLOCK(inp_decr);
5902 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5906 uint32_t vrf_id = 0;
5908 struct sockaddr_in src, dst;
5911 struct sctp_chunkhdr *ch;
5913 uint8_t compute_crc;
5919 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
5920 SCTP_RELEASE_PKT(i_pak);
5923 m = SCTP_HEADER_TO_CHAIN(i_pak);
5924 #ifdef SCTP_MBUF_LOGGING
5925 /* Log in any input mbufs */
5926 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5927 sctp_log_mbc(m, SCTP_MBUF_INPUT);
5930 #ifdef SCTP_PACKET_LOGGING
5931 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
5935 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
5936 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
5938 if_name(m->m_pkthdr.rcvif),
5939 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
5940 mflowid = m->m_pkthdr.flowid;
5941 mflowtype = M_HASHTYPE_GET(m);
5942 fibnum = M_GETFIB(m);
5943 SCTP_STAT_INCR(sctps_recvpackets);
5944 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
5945 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
5946 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5947 if (SCTP_BUF_LEN(m) < offset) {
5948 if ((m = m_pullup(m, offset)) == NULL) {
5949 SCTP_STAT_INCR(sctps_hdrops);
5953 ip = mtod(m, struct ip *);
5954 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
5955 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
5956 offset -= sizeof(struct sctp_chunkhdr);
5957 memset(&src, 0, sizeof(struct sockaddr_in));
5958 src.sin_family = AF_INET;
5959 src.sin_len = sizeof(struct sockaddr_in);
5960 src.sin_port = sh->src_port;
5961 src.sin_addr = ip->ip_src;
5962 memset(&dst, 0, sizeof(struct sockaddr_in));
5963 dst.sin_family = AF_INET;
5964 dst.sin_len = sizeof(struct sockaddr_in);
5965 dst.sin_port = sh->dest_port;
5966 dst.sin_addr = ip->ip_dst;
5967 length = ntohs(ip->ip_len);
5968 /* Validate mbuf chain length with IP payload length. */
5969 if (SCTP_HEADER_LEN(m) != length) {
5970 SCTPDBG(SCTP_DEBUG_INPUT1,
5971 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
5972 SCTP_STAT_INCR(sctps_hdrops);
5975 /* SCTP does not allow broadcasts or multicasts */
5976 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
5979 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
5982 ecn_bits = ip->ip_tos;
5983 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
5984 SCTP_STAT_INCR(sctps_recvhwcrc);
5987 SCTP_STAT_INCR(sctps_recvswcrc);
5990 sctp_common_input_processing(&m, iphlen, offset, length,
5991 (struct sockaddr *)&src,
5992 (struct sockaddr *)&dst,
5996 mflowtype, mflowid, fibnum,
6005 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6006 extern int *sctp_cpuarry;
6010 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
6017 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
6023 uint32_t flowid, tag;
6025 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
6026 flowid = m->m_pkthdr.flowid;
6029 * No flow id built by lower layers fix it so we
6032 offset = off + sizeof(struct sctphdr);
6033 if (SCTP_BUF_LEN(m) < offset) {
6034 if ((m = m_pullup(m, offset)) == NULL) {
6035 SCTP_STAT_INCR(sctps_hdrops);
6036 return (IPPROTO_DONE);
6039 ip = mtod(m, struct ip *);
6040 sh = (struct sctphdr *)((caddr_t)ip + off);
6041 tag = htonl(sh->v_tag);
6042 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
6043 m->m_pkthdr.flowid = flowid;
6044 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE_HASH);
6046 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
6047 sctp_queue_to_mcore(m, off, cpu_to_use);
6048 return (IPPROTO_DONE);
6051 sctp_input_with_port(m, off, 0);
6052 return (IPPROTO_DONE);