2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <netinet/sctp_os.h>
39 #include <netinet/sctp_var.h>
40 #include <netinet/sctp_sysctl.h>
41 #include <netinet/sctp_pcb.h>
42 #include <netinet/sctp_header.h>
43 #include <netinet/sctputil.h>
44 #include <netinet/sctp_output.h>
45 #include <netinet/sctp_input.h>
46 #include <netinet/sctp_auth.h>
47 #include <netinet/sctp_indata.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctp_bsd_addr.h>
50 #include <netinet/sctp_timer.h>
51 #include <netinet/sctp_crc32.h>
52 #if defined(INET) || defined(INET6)
53 #include <netinet/udp.h>
60 sctp_stop_all_cookie_timers(struct sctp_tcb *stcb)
62 struct sctp_nets *net;
65 * This now not only stops all cookie timers it also stops any INIT
66 * timers as well. This will make sure that the timers are stopped
67 * in all collision cases.
69 SCTP_TCB_LOCK_ASSERT(stcb);
70 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
71 if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) {
72 sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE,
75 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1);
76 } else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) {
77 sctp_timer_stop(SCTP_TIMER_TYPE_INIT,
80 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2);
87 sctp_handle_init(struct mbuf *m, int iphlen, int offset,
88 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
89 struct sctp_init_chunk *cp, struct sctp_inpcb *inp,
90 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_no_unlock,
91 uint8_t mflowtype, uint32_t mflowid,
92 uint32_t vrf_id, uint16_t port)
94 struct sctp_init *init;
97 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_init: handling INIT tcb:%p\n",
102 /* validate length */
103 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_chunk)) {
104 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
105 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
109 *abort_no_unlock = 1;
112 /* validate parameters */
114 if (init->initiate_tag == 0) {
115 /* protocol error... send abort */
116 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
117 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
121 *abort_no_unlock = 1;
124 if (ntohl(init->a_rwnd) < SCTP_MIN_RWND) {
125 /* invalid parameter... send abort */
126 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
127 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
131 *abort_no_unlock = 1;
134 if (init->num_inbound_streams == 0) {
135 /* protocol error... send abort */
136 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
137 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
141 *abort_no_unlock = 1;
144 if (init->num_outbound_streams == 0) {
145 /* protocol error... send abort */
146 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
147 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
151 *abort_no_unlock = 1;
154 if (sctp_validate_init_auth_params(m, offset + sizeof(*cp),
155 offset + ntohs(cp->ch.chunk_length))) {
156 /* auth parameter(s) error... send abort */
157 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
158 "Problem with AUTH parameters");
159 sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
163 *abort_no_unlock = 1;
166 /* We are only accepting if we have a listening socket. */
167 if ((stcb == NULL) &&
168 ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
169 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
170 (!SCTP_IS_LISTENING(inp)))) {
172 * FIX ME ?? What about TCP model and we have a
173 * match/restart case? Actually no fix is needed. the lookup
174 * will always find the existing assoc so stcb would not be
175 * NULL. It may be questionable to do this since we COULD
176 * just send back the INIT-ACK and hope that the app did
177 * accept()'s by the time the COOKIE was sent. But there is
178 * a price to pay for COOKIE generation and I don't want to
179 * pay it on the chance that the app will actually do some
180 * accepts(). The App just looses and should NOT be in this
183 if (SCTP_BASE_SYSCTL(sctp_blackhole) == 0) {
184 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
186 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
187 mflowtype, mflowid, inp->fibnum,
192 if ((stcb != NULL) &&
193 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT)) {
194 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending SHUTDOWN-ACK\n");
195 sctp_send_shutdown_ack(stcb, NULL);
196 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
198 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending INIT-ACK\n");
199 sctp_send_initiate_ack(inp, stcb, net, m, iphlen, offset,
206 SCTP_INP_RUNLOCK(inp);
211 * process peer "INIT/INIT-ACK" chunk returns value < 0 on error
215 sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked
216 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
223 struct sctp_stream_queue_pending *sp;
224 struct sctp_association *asoc;
227 * This function returns if any stream has true unsent data on it.
228 * Note that as it looks through it will clean up any places that
229 * have old data that has been sent but left at top of stream queue.
233 SCTP_TCB_SEND_LOCK(stcb);
234 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
235 /* Check to see if some data queued */
236 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
237 /* sa_ignore FREED_MEMORY */
238 sp = TAILQ_FIRST(&stcb->asoc.strmout[i].outqueue);
242 if ((sp->msg_is_complete) &&
244 (sp->sender_all_done)) {
246 * We are doing differed cleanup. Last time
247 * through when we took all the data the
248 * sender_all_done was not set.
250 if (sp->put_last_out == 0) {
251 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
252 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
258 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
259 TAILQ_REMOVE(&stcb->asoc.strmout[i].outqueue, sp, next);
260 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, &asoc->strmout[i], sp, 1);
262 sctp_free_remote_addr(sp->net);
266 sctp_m_freem(sp->data);
269 sctp_free_a_strmoq(stcb, sp, so_locked);
270 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
276 if (unsent_data > 0) {
281 SCTP_TCB_SEND_UNLOCK(stcb);
282 return (unsent_data);
286 sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
288 struct sctp_init *init;
289 struct sctp_association *asoc;
290 struct sctp_nets *lnet;
295 /* save off parameters */
296 asoc->peer_vtag = ntohl(init->initiate_tag);
297 asoc->peers_rwnd = ntohl(init->a_rwnd);
299 asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1;
301 if (!TAILQ_EMPTY(&asoc->nets)) {
302 /* update any ssthresh's that may have a default */
303 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
304 lnet->ssthresh = asoc->peers_rwnd;
305 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
306 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION);
310 SCTP_TCB_SEND_LOCK(stcb);
311 if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) {
313 struct sctp_stream_out *outs;
314 struct sctp_stream_queue_pending *sp, *nsp;
315 struct sctp_tmit_chunk *chk, *nchk;
317 /* abandon the upper streams */
318 newcnt = ntohs(init->num_inbound_streams);
319 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
320 if (chk->rec.data.sid >= newcnt) {
321 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
322 asoc->send_queue_cnt--;
323 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
324 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
327 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
330 if (chk->data != NULL) {
331 sctp_free_bufspace(stcb, asoc, chk, 1);
332 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
333 0, chk, SCTP_SO_NOT_LOCKED);
335 sctp_m_freem(chk->data);
339 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
340 /* sa_ignore FREED_MEMORY */
344 for (i = newcnt; i < asoc->pre_open_streams; i++) {
345 outs = &asoc->strmout[i];
346 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
347 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
348 TAILQ_REMOVE(&outs->outqueue, sp, next);
349 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1);
350 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL,
351 stcb, 0, sp, SCTP_SO_NOT_LOCKED);
353 sctp_m_freem(sp->data);
357 sctp_free_remote_addr(sp->net);
361 sctp_free_a_strmoq(stcb, sp, SCTP_SO_NOT_LOCKED);
362 /* sa_ignore FREED_MEMORY */
364 outs->state = SCTP_STREAM_CLOSED;
367 /* cut back the count */
368 asoc->pre_open_streams = newcnt;
370 SCTP_TCB_SEND_UNLOCK(stcb);
371 asoc->streamoutcnt = asoc->pre_open_streams;
373 for (i = 0; i < asoc->streamoutcnt; i++) {
374 asoc->strmout[i].state = SCTP_STREAM_OPEN;
377 /* EY - nr_sack: initialize highest tsn in nr_mapping_array */
378 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
379 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
380 sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
382 /* This is the next one we expect */
383 asoc->str_reset_seq_in = asoc->asconf_seq_in + 1;
385 asoc->mapping_array_base_tsn = ntohl(init->initial_tsn);
386 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->asconf_seq_in;
388 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
389 /* open the requested streams */
391 if (asoc->strmin != NULL) {
392 /* Free the old ones */
393 for (i = 0; i < asoc->streamincnt; i++) {
394 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
395 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
397 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
399 if (asoc->max_inbound_streams > ntohs(init->num_outbound_streams)) {
400 asoc->streamincnt = ntohs(init->num_outbound_streams);
402 asoc->streamincnt = asoc->max_inbound_streams;
404 SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt *
405 sizeof(struct sctp_stream_in), SCTP_M_STRMI);
406 if (asoc->strmin == NULL) {
407 /* we didn't get memory for the streams! */
408 SCTPDBG(SCTP_DEBUG_INPUT2, "process_init: couldn't get memory for the streams!\n");
411 for (i = 0; i < asoc->streamincnt; i++) {
412 asoc->strmin[i].sid = i;
413 asoc->strmin[i].last_mid_delivered = 0xffffffff;
414 TAILQ_INIT(&asoc->strmin[i].inqueue);
415 TAILQ_INIT(&asoc->strmin[i].uno_inqueue);
416 asoc->strmin[i].pd_api_started = 0;
417 asoc->strmin[i].delivery_started = 0;
420 * load_address_from_init will put the addresses into the
421 * association when the COOKIE is processed or the INIT-ACK is
422 * processed. Both types of COOKIE's existing and new call this
423 * routine. It will remove addresses that are no longer in the
424 * association (for the restarting case where addresses are
425 * removed). Up front when the INIT arrives we will discard it if it
426 * is a restart and new addresses have been added.
428 /* sa_ignore MEMLEAK */
433 * INIT-ACK message processing/consumption returns value < 0 on error
436 sctp_process_init_ack(struct mbuf *m, int iphlen, int offset,
437 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
438 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
439 struct sctp_nets *net, int *abort_no_unlock,
440 uint8_t mflowtype, uint32_t mflowid,
443 struct sctp_association *asoc;
445 int retval, abort_flag;
446 uint32_t initack_limit;
447 int nat_friendly = 0;
449 /* First verify that we have no illegal param's */
452 op_err = sctp_arethere_unrecognized_parameters(m,
453 (offset + sizeof(struct sctp_init_chunk)),
454 &abort_flag, (struct sctp_chunkhdr *)cp, &nat_friendly);
456 /* Send an abort and notify peer */
457 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
458 *abort_no_unlock = 1;
462 asoc->peer_supports_nat = (uint8_t)nat_friendly;
463 /* process the peer's parameters in the INIT-ACK */
464 retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb);
468 initack_limit = offset + ntohs(cp->ch.chunk_length);
469 /* load all addresses */
470 if ((retval = sctp_load_addresses_from_init(stcb, m,
471 (offset + sizeof(struct sctp_init_chunk)), initack_limit,
472 src, dst, NULL, stcb->asoc.port))) {
473 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
474 "Problem with address parameters");
475 SCTPDBG(SCTP_DEBUG_INPUT1,
476 "Load addresses from INIT causes an abort %d\n",
478 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
479 src, dst, sh, op_err,
482 *abort_no_unlock = 1;
485 /* if the peer doesn't support asconf, flush the asconf queue */
486 if (asoc->asconf_supported == 0) {
487 struct sctp_asconf_addr *param, *nparam;
489 TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
490 TAILQ_REMOVE(&asoc->asconf_queue, param, next);
491 SCTP_FREE(param, SCTP_M_ASC_ADDR);
494 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
495 stcb->asoc.local_hmacs);
497 sctp_queue_op_err(stcb, op_err);
498 /* queuing will steal away the mbuf chain to the out queue */
501 /* extract the cookie and queue it to "echo" it back... */
502 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
503 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
504 stcb->asoc.overall_error_count,
506 SCTP_FROM_SCTP_INPUT,
509 stcb->asoc.overall_error_count = 0;
510 net->error_count = 0;
513 * Cancel the INIT timer, We do this first before queueing the
514 * cookie. We always cancel at the primary to assue that we are
515 * canceling the timer started by the INIT which always goes to the
518 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
519 asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
521 /* calculate the RTO */
522 net->RTO = sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
523 SCTP_RTT_FROM_NON_DATA);
524 retval = sctp_send_cookie_echo(m, offset, stcb, net);
527 * No cookie, we probably should send a op error. But in any
528 * case if there is no cookie in the INIT-ACK, we can
529 * abandon the peer, its broke.
534 len = (uint16_t)(sizeof(struct sctp_error_missing_param) + sizeof(uint16_t));
535 /* We abort with an error of missing mandatory param */
536 op_err = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
537 if (op_err != NULL) {
538 struct sctp_error_missing_param *cause;
540 SCTP_BUF_LEN(op_err) = len;
541 cause = mtod(op_err, struct sctp_error_missing_param *);
542 /* Subtract the reserved param */
543 cause->cause.code = htons(SCTP_CAUSE_MISSING_PARAM);
544 cause->cause.length = htons(len);
545 cause->num_missing_params = htonl(1);
546 cause->type[0] = htons(SCTP_STATE_COOKIE);
548 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
549 src, dst, sh, op_err,
552 *abort_no_unlock = 1;
560 sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp,
561 struct sctp_tcb *stcb, struct sctp_nets *net)
563 union sctp_sockstore store;
564 struct sctp_nets *r_net, *f_net;
567 uint16_t old_error_counter;
569 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) {
573 memset(&store, 0, sizeof(store));
574 switch (cp->heartbeat.hb_info.addr_family) {
577 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
578 store.sin.sin_family = cp->heartbeat.hb_info.addr_family;
579 store.sin.sin_len = cp->heartbeat.hb_info.addr_len;
580 store.sin.sin_port = stcb->rport;
581 memcpy(&store.sin.sin_addr, cp->heartbeat.hb_info.address,
582 sizeof(store.sin.sin_addr));
590 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
591 store.sin6.sin6_family = cp->heartbeat.hb_info.addr_family;
592 store.sin6.sin6_len = cp->heartbeat.hb_info.addr_len;
593 store.sin6.sin6_port = stcb->rport;
594 memcpy(&store.sin6.sin6_addr, cp->heartbeat.hb_info.address, sizeof(struct in6_addr));
603 r_net = sctp_findnet(stcb, &store.sa);
605 SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
608 if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
609 (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
610 (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
612 * If the its a HB and it's random value is correct when can
613 * confirm the destination.
615 r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
616 if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
617 stcb->asoc.primary_destination = r_net;
618 r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
619 f_net = TAILQ_FIRST(&stcb->asoc.nets);
620 if (f_net != r_net) {
622 * first one on the list is NOT the primary
623 * sctp_cmpaddr() is much more efficient if
624 * the primary is the first on the list,
627 TAILQ_REMOVE(&stcb->asoc.nets, r_net, sctp_next);
628 TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
632 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
633 stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
634 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
635 r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
636 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
638 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
639 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
640 stcb->asoc.overall_error_count,
642 SCTP_FROM_SCTP_INPUT,
645 stcb->asoc.overall_error_count = 0;
646 old_error_counter = r_net->error_count;
647 r_net->error_count = 0;
648 r_net->hb_responded = 1;
649 tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
650 tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
651 /* Now lets do a RTO with this */
652 r_net->RTO = sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv,
653 SCTP_RTT_FROM_NON_DATA);
654 if (!(r_net->dest_state & SCTP_ADDR_REACHABLE)) {
655 r_net->dest_state |= SCTP_ADDR_REACHABLE;
656 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
657 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
659 if (r_net->dest_state & SCTP_ADDR_PF) {
660 r_net->dest_state &= ~SCTP_ADDR_PF;
661 stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
663 if (old_error_counter > 0) {
664 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
665 stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5);
666 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
668 if (r_net == stcb->asoc.primary_destination) {
669 if (stcb->asoc.alternate) {
670 /* release the alternate, primary is good */
671 sctp_free_remote_addr(stcb->asoc.alternate);
672 stcb->asoc.alternate = NULL;
675 /* Mobility adaptation */
677 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
678 SCTP_MOBILITY_BASE) ||
679 sctp_is_mobility_feature_on(stcb->sctp_ep,
680 SCTP_MOBILITY_FASTHANDOFF)) &&
681 sctp_is_mobility_feature_on(stcb->sctp_ep,
682 SCTP_MOBILITY_PRIM_DELETED)) {
684 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
685 stcb->sctp_ep, stcb, NULL,
686 SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
687 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
688 SCTP_MOBILITY_FASTHANDOFF)) {
689 sctp_assoc_immediate_retrans(stcb,
690 stcb->asoc.primary_destination);
692 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
693 SCTP_MOBILITY_BASE)) {
694 sctp_move_chunks_from_net(stcb,
695 stcb->asoc.deleted_primary);
697 sctp_delete_prim_timer(stcb->sctp_ep, stcb,
698 stcb->asoc.deleted_primary);
704 sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
707 * return 0 means we want you to proceed with the abort non-zero
708 * means no abort processing
710 struct sctpasochead *head;
712 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_WAIT) ||
713 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
714 atomic_add_int(&stcb->asoc.refcnt, 1);
715 SCTP_TCB_UNLOCK(stcb);
716 SCTP_INP_INFO_WLOCK();
718 atomic_subtract_int(&stcb->asoc.refcnt, 1);
720 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_WAIT) {
721 /* generate a new vtag and send init */
722 LIST_REMOVE(stcb, sctp_asocs);
723 stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
724 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
726 * put it in the bucket in the vtag hash of assoc's for the
729 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
730 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
731 SCTP_INP_INFO_WUNLOCK();
734 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
736 * treat like a case where the cookie expired i.e.: - dump
737 * current cookie. - generate a new vtag. - resend init.
739 /* generate a new vtag and send init */
740 LIST_REMOVE(stcb, sctp_asocs);
741 stcb->asoc.state &= ~SCTP_STATE_COOKIE_ECHOED;
742 stcb->asoc.state |= SCTP_STATE_COOKIE_WAIT;
743 sctp_stop_all_cookie_timers(stcb);
744 sctp_toss_old_cookies(stcb, &stcb->asoc);
745 stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
746 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
748 * put it in the bucket in the vtag hash of assoc's for the
751 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
752 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
753 SCTP_INP_INFO_WUNLOCK();
760 sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
761 struct sctp_nets *net)
764 * return 0 means we want you to proceed with the abort non-zero
765 * means no abort processing
767 if (stcb->asoc.auth_supported == 0) {
768 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
771 sctp_asconf_send_nat_state_update(stcb, net);
776 /* Returns 1 if the stcb was aborted, 0 otherwise */
778 sctp_handle_abort(struct sctp_abort_chunk *abort,
779 struct sctp_tcb *stcb, struct sctp_nets *net)
781 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
787 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
791 len = ntohs(abort->ch.chunk_length);
792 if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_error_cause)) {
794 * Need to check the cause codes for our two magic nat
795 * aborts which don't kill the assoc necessarily.
797 struct sctp_error_cause *cause;
799 cause = (struct sctp_error_cause *)(abort + 1);
800 error = ntohs(cause->code);
801 if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
802 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
803 abort->ch.chunk_flags);
804 if (sctp_handle_nat_colliding_state(stcb)) {
807 } else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
808 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
809 abort->ch.chunk_flags);
810 if (sctp_handle_nat_missing_state(stcb, net)) {
817 /* stop any receive timers */
818 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, net,
819 SCTP_FROM_SCTP_INPUT + SCTP_LOC_7);
820 /* notify user of the abort and clean up... */
821 sctp_abort_notification(stcb, 1, error, abort, SCTP_SO_NOT_LOCKED);
823 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
824 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
825 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
826 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
828 #ifdef SCTP_ASOCLOG_OF_TSNS
829 sctp_print_out_track_log(stcb);
831 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
832 so = SCTP_INP_SO(stcb->sctp_ep);
833 atomic_add_int(&stcb->asoc.refcnt, 1);
834 SCTP_TCB_UNLOCK(stcb);
835 SCTP_SOCKET_LOCK(so, 1);
837 atomic_subtract_int(&stcb->asoc.refcnt, 1);
839 stcb->asoc.state |= SCTP_STATE_WAS_ABORTED;
840 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
841 SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
842 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
843 SCTP_SOCKET_UNLOCK(so, 1);
845 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
850 sctp_start_net_timers(struct sctp_tcb *stcb)
852 uint32_t cnt_hb_sent;
853 struct sctp_nets *net;
856 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
858 * For each network start: 1) A pmtu timer. 2) A HB timer 3)
859 * If the dest in unconfirmed send a hb as well if under
860 * max_hb_burst have been sent.
862 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
863 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
864 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
865 (cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
866 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
871 sctp_chunk_output(stcb->sctp_ep, stcb,
872 SCTP_OUTPUT_FROM_COOKIE_ACK,
879 sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
880 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
882 struct sctp_association *asoc;
883 int some_on_streamwheel;
885 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
889 SCTPDBG(SCTP_DEBUG_INPUT2,
890 "sctp_handle_shutdown: handling SHUTDOWN\n");
894 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
895 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
898 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
899 /* Shutdown NOT the expected size */
902 old_state = SCTP_GET_STATE(asoc);
903 sctp_update_acked(stcb, cp, abort_flag);
907 if (asoc->control_pdapi) {
909 * With a normal shutdown we assume the end of last record.
911 SCTP_INP_READ_LOCK(stcb->sctp_ep);
912 if (asoc->control_pdapi->on_strm_q) {
913 struct sctp_stream_in *strm;
915 strm = &asoc->strmin[asoc->control_pdapi->sinfo_stream];
916 if (asoc->control_pdapi->on_strm_q == SCTP_ON_UNORDERED) {
918 TAILQ_REMOVE(&strm->uno_inqueue, asoc->control_pdapi, next_instrm);
919 asoc->control_pdapi->on_strm_q = 0;
920 } else if (asoc->control_pdapi->on_strm_q == SCTP_ON_ORDERED) {
922 TAILQ_REMOVE(&strm->inqueue, asoc->control_pdapi, next_instrm);
923 asoc->control_pdapi->on_strm_q = 0;
926 panic("Unknown state on ctrl:%p on_strm_q:%d",
928 asoc->control_pdapi->on_strm_q);
932 asoc->control_pdapi->end_added = 1;
933 asoc->control_pdapi->pdapi_aborted = 1;
934 asoc->control_pdapi = NULL;
935 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
936 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
937 so = SCTP_INP_SO(stcb->sctp_ep);
938 atomic_add_int(&stcb->asoc.refcnt, 1);
939 SCTP_TCB_UNLOCK(stcb);
940 SCTP_SOCKET_LOCK(so, 1);
942 atomic_subtract_int(&stcb->asoc.refcnt, 1);
943 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
944 /* assoc was freed while we were unlocked */
945 SCTP_SOCKET_UNLOCK(so, 1);
949 if (stcb->sctp_socket) {
950 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
952 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
953 SCTP_SOCKET_UNLOCK(so, 1);
956 /* goto SHUTDOWN_RECEIVED state to block new requests */
957 if (stcb->sctp_socket) {
958 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
959 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
960 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) {
961 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_RECEIVED);
962 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
964 * notify upper layer that peer has initiated a
967 sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
970 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
973 if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) {
975 * stop the shutdown timer, since we WILL move to
978 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
979 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
981 /* Now is there unsent data on a stream somewhere? */
982 some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
984 if (!TAILQ_EMPTY(&asoc->send_queue) ||
985 !TAILQ_EMPTY(&asoc->sent_queue) ||
986 some_on_streamwheel) {
987 /* By returning we will push more data out */
990 /* no outstanding data to send, so move on... */
991 /* send SHUTDOWN-ACK */
992 /* move to SHUTDOWN-ACK-SENT state */
993 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
994 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
995 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
997 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
998 if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
999 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_ACK_SENT);
1000 sctp_stop_timers_for_shutdown(stcb);
1001 sctp_send_shutdown_ack(stcb, net);
1002 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK,
1003 stcb->sctp_ep, stcb, net);
1004 } else if (old_state == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1005 sctp_send_shutdown_ack(stcb, net);
1011 sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
1012 struct sctp_tcb *stcb,
1013 struct sctp_nets *net)
1015 struct sctp_association *asoc;
1016 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1019 so = SCTP_INP_SO(stcb->sctp_ep);
1021 SCTPDBG(SCTP_DEBUG_INPUT2,
1022 "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
1027 /* process according to association state */
1028 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
1029 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
1030 /* unexpected SHUTDOWN-ACK... do OOTB handling... */
1031 sctp_send_shutdown_complete(stcb, net, 1);
1032 SCTP_TCB_UNLOCK(stcb);
1035 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
1036 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
1037 /* unexpected SHUTDOWN-ACK... so ignore... */
1038 SCTP_TCB_UNLOCK(stcb);
1041 if (asoc->control_pdapi) {
1043 * With a normal shutdown we assume the end of last record.
1045 SCTP_INP_READ_LOCK(stcb->sctp_ep);
1046 asoc->control_pdapi->end_added = 1;
1047 asoc->control_pdapi->pdapi_aborted = 1;
1048 asoc->control_pdapi = NULL;
1049 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
1050 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1051 atomic_add_int(&stcb->asoc.refcnt, 1);
1052 SCTP_TCB_UNLOCK(stcb);
1053 SCTP_SOCKET_LOCK(so, 1);
1054 SCTP_TCB_LOCK(stcb);
1055 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1056 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1057 /* assoc was freed while we were unlocked */
1058 SCTP_SOCKET_UNLOCK(so, 1);
1062 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
1063 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1064 SCTP_SOCKET_UNLOCK(so, 1);
1068 if (!TAILQ_EMPTY(&asoc->send_queue) ||
1069 !TAILQ_EMPTY(&asoc->sent_queue) ||
1070 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
1071 panic("Queues are not empty when handling SHUTDOWN-ACK");
1074 /* stop the timer */
1075 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net,
1076 SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
1077 /* send SHUTDOWN-COMPLETE */
1078 sctp_send_shutdown_complete(stcb, net, 0);
1079 /* notify upper layer protocol */
1080 if (stcb->sctp_socket) {
1081 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1082 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1083 stcb->sctp_socket->so_snd.sb_cc = 0;
1085 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
1087 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
1088 /* free the TCB but first save off the ep */
1089 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1090 atomic_add_int(&stcb->asoc.refcnt, 1);
1091 SCTP_TCB_UNLOCK(stcb);
1092 SCTP_SOCKET_LOCK(so, 1);
1093 SCTP_TCB_LOCK(stcb);
1094 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1096 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1097 SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
1098 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1099 SCTP_SOCKET_UNLOCK(so, 1);
1104 sctp_process_unrecog_chunk(struct sctp_tcb *stcb, uint8_t chunk_type,
1105 struct sctp_nets *net)
1107 switch (chunk_type) {
1108 case SCTP_ASCONF_ACK:
1110 sctp_asconf_cleanup(stcb, net);
1112 case SCTP_IFORWARD_CUM_TSN:
1113 case SCTP_FORWARD_CUM_TSN:
1114 stcb->asoc.prsctp_supported = 0;
1117 SCTPDBG(SCTP_DEBUG_INPUT2,
1118 "Peer does not support chunk type %d (0x%x).\n",
1119 chunk_type, chunk_type);
1125 * Skip past the param header and then we will find the param that caused the
1126 * problem. There are a number of param's in a ASCONF OR the prsctp param
1127 * these will turn of specific features.
1128 * XXX: Is this the right thing to do?
1131 sctp_process_unrecog_param(struct sctp_tcb *stcb, uint16_t parameter_type)
1133 switch (parameter_type) {
1135 case SCTP_PRSCTP_SUPPORTED:
1136 stcb->asoc.prsctp_supported = 0;
1138 case SCTP_SUPPORTED_CHUNK_EXT:
1140 /* draft-ietf-tsvwg-addip-sctp */
1141 case SCTP_HAS_NAT_SUPPORT:
1142 stcb->asoc.peer_supports_nat = 0;
1144 case SCTP_ADD_IP_ADDRESS:
1145 case SCTP_DEL_IP_ADDRESS:
1146 case SCTP_SET_PRIM_ADDR:
1147 stcb->asoc.asconf_supported = 0;
1149 case SCTP_SUCCESS_REPORT:
1150 case SCTP_ERROR_CAUSE_IND:
1151 SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
1152 SCTPDBG(SCTP_DEBUG_INPUT2,
1153 "Turning off ASCONF to this strange peer\n");
1154 stcb->asoc.asconf_supported = 0;
1157 SCTPDBG(SCTP_DEBUG_INPUT2,
1158 "Peer does not support param type %d (0x%x)??\n",
1159 parameter_type, parameter_type);
1165 sctp_handle_error(struct sctp_chunkhdr *ch,
1166 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
1168 struct sctp_error_cause *cause;
1169 struct sctp_association *asoc;
1170 uint32_t remaining_length, adjust;
1171 uint16_t code, cause_code, cause_length;
1172 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1176 /* parse through all of the errors and process */
1178 cause = (struct sctp_error_cause *)((caddr_t)ch +
1179 sizeof(struct sctp_chunkhdr));
1180 remaining_length = ntohs(ch->chunk_length);
1181 if (remaining_length > limit) {
1182 remaining_length = limit;
1184 if (remaining_length >= sizeof(struct sctp_chunkhdr)) {
1185 remaining_length -= sizeof(struct sctp_chunkhdr);
1187 remaining_length = 0;
1190 while (remaining_length >= sizeof(struct sctp_error_cause)) {
1191 /* Process an Error Cause */
1192 cause_code = ntohs(cause->code);
1193 cause_length = ntohs(cause->length);
1194 if ((cause_length > remaining_length) || (cause_length == 0)) {
1195 /* Invalid cause length, possibly due to truncation. */
1196 SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in cause - bytes left: %u cause length: %u\n",
1197 remaining_length, cause_length);
1201 /* report the first error cause */
1204 switch (cause_code) {
1205 case SCTP_CAUSE_INVALID_STREAM:
1206 case SCTP_CAUSE_MISSING_PARAM:
1207 case SCTP_CAUSE_INVALID_PARAM:
1208 case SCTP_CAUSE_NO_USER_DATA:
1209 SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %u back? We have a bug :/ (or do they?)\n",
1212 case SCTP_CAUSE_NAT_COLLIDING_STATE:
1213 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags: %x\n",
1215 if (sctp_handle_nat_colliding_state(stcb)) {
1219 case SCTP_CAUSE_NAT_MISSING_STATE:
1220 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags: %x\n",
1222 if (sctp_handle_nat_missing_state(stcb, net)) {
1226 case SCTP_CAUSE_STALE_COOKIE:
1228 * We only act if we have echoed a cookie and are
1231 if ((cause_length >= sizeof(struct sctp_error_stale_cookie)) &&
1232 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
1233 struct sctp_error_stale_cookie *stale_cookie;
1235 stale_cookie = (struct sctp_error_stale_cookie *)cause;
1236 asoc->cookie_preserve_req = ntohl(stale_cookie->stale_time);
1237 /* Double it to be more robust on RTX */
1238 if (asoc->cookie_preserve_req <= UINT32_MAX / 2) {
1239 asoc->cookie_preserve_req *= 2;
1241 asoc->cookie_preserve_req = UINT32_MAX;
1243 asoc->stale_cookie_count++;
1244 if (asoc->stale_cookie_count >
1245 asoc->max_init_times) {
1246 sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
1247 /* now free the asoc */
1248 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1249 so = SCTP_INP_SO(stcb->sctp_ep);
1250 atomic_add_int(&stcb->asoc.refcnt, 1);
1251 SCTP_TCB_UNLOCK(stcb);
1252 SCTP_SOCKET_LOCK(so, 1);
1253 SCTP_TCB_LOCK(stcb);
1254 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1256 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1257 SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
1258 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1259 SCTP_SOCKET_UNLOCK(so, 1);
1263 /* blast back to INIT state */
1264 sctp_toss_old_cookies(stcb, &stcb->asoc);
1265 asoc->state &= ~SCTP_STATE_COOKIE_ECHOED;
1266 asoc->state |= SCTP_STATE_COOKIE_WAIT;
1267 sctp_stop_all_cookie_timers(stcb);
1268 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
1271 case SCTP_CAUSE_UNRESOLVABLE_ADDR:
1273 * Nothing we can do here, we don't do hostname
1274 * addresses so if the peer does not like my IPv6
1275 * (or IPv4 for that matter) it does not matter. If
1276 * they don't support that type of address, they can
1277 * NOT possibly get that packet type... i.e. with no
1278 * IPv6 you can't receive a IPv6 packet. so we can
1279 * safely ignore this one. If we ever added support
1280 * for HOSTNAME Addresses, then we would need to do
1284 case SCTP_CAUSE_UNRECOG_CHUNK:
1285 if (cause_length >= sizeof(struct sctp_error_unrecognized_chunk)) {
1286 struct sctp_error_unrecognized_chunk *unrec_chunk;
1288 unrec_chunk = (struct sctp_error_unrecognized_chunk *)cause;
1289 sctp_process_unrecog_chunk(stcb, unrec_chunk->ch.chunk_type, net);
1292 case SCTP_CAUSE_UNRECOG_PARAM:
1293 /* XXX: We only consider the first parameter */
1294 if (cause_length >= sizeof(struct sctp_error_cause) + sizeof(struct sctp_paramhdr)) {
1295 struct sctp_paramhdr *unrec_parameter;
1297 unrec_parameter = (struct sctp_paramhdr *)(cause + 1);
1298 sctp_process_unrecog_param(stcb, ntohs(unrec_parameter->param_type));
1301 case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
1303 * We ignore this since the timer will drive out a
1304 * new cookie anyway and there timer will drive us
1305 * to send a SHUTDOWN_COMPLETE. We can't send one
1306 * here since we don't have their tag.
1309 case SCTP_CAUSE_DELETING_LAST_ADDR:
1310 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1311 case SCTP_CAUSE_DELETING_SRC_ADDR:
1313 * We should NOT get these here, but in a
1316 SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a error cause with code %u.\n",
1319 case SCTP_CAUSE_OUT_OF_RESC:
1321 * And what, pray tell do we do with the fact that
1322 * the peer is out of resources? Not really sure we
1323 * could do anything but abort. I suspect this
1324 * should have came WITH an abort instead of in a
1329 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown code 0x%x\n",
1333 adjust = SCTP_SIZE32(cause_length);
1334 if (remaining_length >= adjust) {
1335 remaining_length -= adjust;
1337 remaining_length = 0;
1339 cause = (struct sctp_error_cause *)((caddr_t)cause + adjust);
1341 sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, code, ch, SCTP_SO_NOT_LOCKED);
1346 sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
1347 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
1348 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
1349 struct sctp_nets *net, int *abort_no_unlock,
1350 uint8_t mflowtype, uint32_t mflowid,
1353 struct sctp_init_ack *init_ack;
1354 struct mbuf *op_err;
1356 SCTPDBG(SCTP_DEBUG_INPUT2,
1357 "sctp_handle_init_ack: handling INIT-ACK\n");
1360 SCTPDBG(SCTP_DEBUG_INPUT2,
1361 "sctp_handle_init_ack: TCB is null\n");
1364 if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) {
1365 /* Invalid length */
1366 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1367 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1368 src, dst, sh, op_err,
1371 *abort_no_unlock = 1;
1374 init_ack = &cp->init;
1375 /* validate parameters */
1376 if (init_ack->initiate_tag == 0) {
1377 /* protocol error... send an abort */
1378 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1379 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1380 src, dst, sh, op_err,
1383 *abort_no_unlock = 1;
1386 if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) {
1387 /* protocol error... send an abort */
1388 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1389 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1390 src, dst, sh, op_err,
1393 *abort_no_unlock = 1;
1396 if (init_ack->num_inbound_streams == 0) {
1397 /* protocol error... send an abort */
1398 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1399 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1400 src, dst, sh, op_err,
1403 *abort_no_unlock = 1;
1406 if (init_ack->num_outbound_streams == 0) {
1407 /* protocol error... send an abort */
1408 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1409 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1410 src, dst, sh, op_err,
1413 *abort_no_unlock = 1;
1416 /* process according to association state... */
1417 switch (stcb->asoc.state & SCTP_STATE_MASK) {
1418 case SCTP_STATE_COOKIE_WAIT:
1419 /* this is the expected state for this chunk */
1420 /* process the INIT-ACK parameters */
1421 if (stcb->asoc.primary_destination->dest_state &
1422 SCTP_ADDR_UNCONFIRMED) {
1424 * The primary is where we sent the INIT, we can
1425 * always consider it confirmed when the INIT-ACK is
1426 * returned. Do this before we load addresses
1429 stcb->asoc.primary_destination->dest_state &=
1430 ~SCTP_ADDR_UNCONFIRMED;
1431 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
1432 stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
1434 if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
1435 net, abort_no_unlock,
1438 /* error in parsing parameters */
1441 /* update our state */
1442 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
1443 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_ECHOED);
1445 /* reset the RTO calc */
1446 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1447 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1448 stcb->asoc.overall_error_count,
1450 SCTP_FROM_SCTP_INPUT,
1453 stcb->asoc.overall_error_count = 0;
1454 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
1456 * collapse the init timer back in case of a exponential
1459 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
1462 * the send at the end of the inbound data processing will
1463 * cause the cookie to be sent
1466 case SCTP_STATE_SHUTDOWN_SENT:
1467 /* incorrect state... discard */
1469 case SCTP_STATE_COOKIE_ECHOED:
1470 /* incorrect state... discard */
1472 case SCTP_STATE_OPEN:
1473 /* incorrect state... discard */
1475 case SCTP_STATE_EMPTY:
1476 case SCTP_STATE_INUSE:
1478 /* incorrect state... discard */
1482 SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
1486 static struct sctp_tcb *
1487 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1488 struct sockaddr *src, struct sockaddr *dst,
1489 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1490 struct sctp_inpcb *inp, struct sctp_nets **netp,
1491 struct sockaddr *init_src, int *notification,
1492 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1493 uint8_t mflowtype, uint32_t mflowid,
1494 uint32_t vrf_id, uint16_t port);
1498 * handle a state cookie for an existing association m: input packet mbuf
1499 * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
1500 * "split" mbuf and the cookie signature does not exist offset: offset into
1501 * mbuf to the cookie-echo chunk
1503 static struct sctp_tcb *
1504 sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
1505 struct sockaddr *src, struct sockaddr *dst,
1506 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1507 struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
1508 struct sockaddr *init_src, int *notification,
1509 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1510 uint8_t mflowtype, uint32_t mflowid,
1511 uint32_t vrf_id, uint16_t port)
1513 struct sctp_association *asoc;
1514 struct sctp_init_chunk *init_cp, init_buf;
1515 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1516 struct sctp_nets *net;
1517 struct mbuf *op_err;
1519 int init_offset, initack_offset, i;
1523 #if defined(SCTP_DETAILED_STR_STATS)
1528 /* I know that the TCB is non-NULL from the caller */
1530 for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
1531 if (asoc->cookie_how[how_indx] == 0)
1534 if (how_indx < sizeof(asoc->cookie_how)) {
1535 asoc->cookie_how[how_indx] = 1;
1537 if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1538 /* SHUTDOWN came in after sending INIT-ACK */
1539 sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
1540 op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
1541 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
1542 mflowtype, mflowid, inp->fibnum,
1544 if (how_indx < sizeof(asoc->cookie_how))
1545 asoc->cookie_how[how_indx] = 2;
1549 * find and validate the INIT chunk in the cookie (peer's info) the
1550 * INIT should start after the cookie-echo header struct (chunk
1551 * header, state cookie header struct)
1553 init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
1555 init_cp = (struct sctp_init_chunk *)
1556 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1557 (uint8_t *)&init_buf);
1558 if (init_cp == NULL) {
1559 /* could not pull a INIT chunk in cookie */
1562 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1566 * find and validate the INIT-ACK chunk in the cookie (my info) the
1567 * INIT-ACK follows the INIT chunk
1569 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1570 initack_cp = (struct sctp_init_ack_chunk *)
1571 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1572 (uint8_t *)&initack_buf);
1573 if (initack_cp == NULL) {
1574 /* could not pull INIT-ACK chunk in cookie */
1577 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1580 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1581 (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
1583 * case D in Section 5.2.4 Table 2: MMAA process accordingly
1584 * to get into the OPEN state
1586 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1588 * Opps, this means that we somehow generated two vtag's
1589 * the same. I.e. we did:
1591 * <---INIT(tag=a)------
1592 * ----INIT-ACK(tag=t)-->
1593 * ----INIT(tag=t)------> *1
1594 * <---INIT-ACK(tag=a)---
1595 * <----CE(tag=t)------------- *2
1597 * At point *1 we should be generating a different
1598 * tag t'. Which means we would throw away the CE and send
1599 * ours instead. Basically this is case C (throw away side).
1601 if (how_indx < sizeof(asoc->cookie_how))
1602 asoc->cookie_how[how_indx] = 17;
1606 switch (SCTP_GET_STATE(asoc)) {
1607 case SCTP_STATE_COOKIE_WAIT:
1608 case SCTP_STATE_COOKIE_ECHOED:
1610 * INIT was sent but got a COOKIE_ECHO with the
1611 * correct tags... just accept it...but we must
1612 * process the init so that we can make sure we have
1613 * the right seq no's.
1615 /* First we must process the INIT !! */
1616 retval = sctp_process_init(init_cp, stcb);
1618 if (how_indx < sizeof(asoc->cookie_how))
1619 asoc->cookie_how[how_indx] = 3;
1622 /* we have already processed the INIT so no problem */
1623 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp,
1625 SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
1626 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp,
1628 SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
1629 /* update current state */
1630 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)
1631 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1633 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1635 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1636 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1637 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1638 stcb->sctp_ep, stcb, asoc->primary_destination);
1640 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1641 sctp_stop_all_cookie_timers(stcb);
1642 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1643 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1644 (!SCTP_IS_LISTENING(inp))) {
1645 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1649 * Here is where collision would go if we
1650 * did a connect() and instead got a
1651 * init/init-ack/cookie done before the
1652 * init-ack came back..
1654 stcb->sctp_ep->sctp_flags |=
1655 SCTP_PCB_FLAGS_CONNECTED;
1656 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1657 so = SCTP_INP_SO(stcb->sctp_ep);
1658 atomic_add_int(&stcb->asoc.refcnt, 1);
1659 SCTP_TCB_UNLOCK(stcb);
1660 SCTP_SOCKET_LOCK(so, 1);
1661 SCTP_TCB_LOCK(stcb);
1662 atomic_add_int(&stcb->asoc.refcnt, -1);
1663 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1664 SCTP_SOCKET_UNLOCK(so, 1);
1668 soisconnected(stcb->sctp_socket);
1669 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1670 SCTP_SOCKET_UNLOCK(so, 1);
1673 /* notify upper layer */
1674 *notification = SCTP_NOTIFY_ASSOC_UP;
1676 * since we did not send a HB make sure we don't
1679 old.tv_sec = cookie->time_entered.tv_sec;
1680 old.tv_usec = cookie->time_entered.tv_usec;
1681 net->hb_responded = 1;
1682 net->RTO = sctp_calculate_rto(stcb, asoc, net,
1684 SCTP_RTT_FROM_NON_DATA);
1686 if (stcb->asoc.sctp_autoclose_ticks &&
1687 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1688 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1694 * we're in the OPEN state (or beyond), so peer must
1695 * have simply lost the COOKIE-ACK
1699 sctp_stop_all_cookie_timers(stcb);
1701 * We ignore the return code here.. not sure if we should
1702 * somehow abort.. but we do have an existing asoc. This
1703 * really should not fail.
1705 if (sctp_load_addresses_from_init(stcb, m,
1706 init_offset + sizeof(struct sctp_init_chunk),
1707 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1708 if (how_indx < sizeof(asoc->cookie_how))
1709 asoc->cookie_how[how_indx] = 4;
1712 /* respond with a COOKIE-ACK */
1713 sctp_toss_old_cookies(stcb, asoc);
1714 sctp_send_cookie_ack(stcb);
1715 if (how_indx < sizeof(asoc->cookie_how))
1716 asoc->cookie_how[how_indx] = 5;
1719 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1720 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1721 cookie->tie_tag_my_vtag == 0 &&
1722 cookie->tie_tag_peer_vtag == 0) {
1724 * case C in Section 5.2.4 Table 2: XMOO silently discard
1726 if (how_indx < sizeof(asoc->cookie_how))
1727 asoc->cookie_how[how_indx] = 6;
1731 * If nat support, and the below and stcb is established, send back
1732 * a ABORT(colliding state) if we are established.
1734 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) &&
1735 (asoc->peer_supports_nat) &&
1736 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1737 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1738 (asoc->peer_vtag == 0)))) {
1740 * Special case - Peer's support nat. We may have two init's
1741 * that we gave out the same tag on since one was not
1742 * established.. i.e. we get INIT from host-1 behind the nat
1743 * and we respond tag-a, we get a INIT from host-2 behind
1744 * the nat and we get tag-a again. Then we bring up host-1
1745 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1746 * Now we have colliding state. We must send an abort here
1747 * with colliding state indication.
1749 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1750 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1751 mflowtype, mflowid, inp->fibnum,
1755 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1756 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1757 (asoc->peer_vtag == 0))) {
1759 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1760 * should be ok, re-accept peer info
1762 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1764 * Extension of case C. If we hit this, then the
1765 * random number generator returned the same vtag
1766 * when we first sent our INIT-ACK and when we later
1767 * sent our INIT. The side with the seq numbers that
1768 * are different will be the one that normnally
1769 * would have hit case C. This in effect "extends"
1770 * our vtags in this collision case to be 64 bits.
1771 * The same collision could occur aka you get both
1772 * vtag and seq number the same twice in a row.. but
1773 * is much less likely. If it did happen then we
1774 * would proceed through and bring up the assoc.. we
1775 * may end up with the wrong stream setup however..
1776 * which would be bad.. but there is no way to
1777 * tell.. until we send on a stream that does not
1780 if (how_indx < sizeof(asoc->cookie_how))
1781 asoc->cookie_how[how_indx] = 7;
1785 if (how_indx < sizeof(asoc->cookie_how))
1786 asoc->cookie_how[how_indx] = 8;
1787 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1788 SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1789 sctp_stop_all_cookie_timers(stcb);
1791 * since we did not send a HB make sure we don't double
1794 net->hb_responded = 1;
1795 if (stcb->asoc.sctp_autoclose_ticks &&
1796 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1797 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1800 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1801 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
1803 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1805 * Ok the peer probably discarded our data (if we
1806 * echoed a cookie+data). So anything on the
1807 * sent_queue should be marked for retransmit, we
1808 * may not get something to kick us so it COULD
1809 * still take a timeout to move these.. but it can't
1810 * hurt to mark them.
1812 struct sctp_tmit_chunk *chk;
1814 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1815 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1816 chk->sent = SCTP_DATAGRAM_RESEND;
1817 sctp_flight_size_decrease(chk);
1818 sctp_total_flight_decrease(stcb, chk);
1819 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1825 /* process the INIT info (peer's info) */
1826 retval = sctp_process_init(init_cp, stcb);
1828 if (how_indx < sizeof(asoc->cookie_how))
1829 asoc->cookie_how[how_indx] = 9;
1832 if (sctp_load_addresses_from_init(stcb, m,
1833 init_offset + sizeof(struct sctp_init_chunk),
1834 initack_offset, src, dst, init_src, stcb->asoc.port)) {
1835 if (how_indx < sizeof(asoc->cookie_how))
1836 asoc->cookie_how[how_indx] = 10;
1839 if ((asoc->state & SCTP_STATE_COOKIE_WAIT) ||
1840 (asoc->state & SCTP_STATE_COOKIE_ECHOED)) {
1841 *notification = SCTP_NOTIFY_ASSOC_UP;
1843 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1844 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1845 (!SCTP_IS_LISTENING(inp))) {
1846 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1849 stcb->sctp_ep->sctp_flags |=
1850 SCTP_PCB_FLAGS_CONNECTED;
1851 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1852 so = SCTP_INP_SO(stcb->sctp_ep);
1853 atomic_add_int(&stcb->asoc.refcnt, 1);
1854 SCTP_TCB_UNLOCK(stcb);
1855 SCTP_SOCKET_LOCK(so, 1);
1856 SCTP_TCB_LOCK(stcb);
1857 atomic_add_int(&stcb->asoc.refcnt, -1);
1858 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
1859 SCTP_SOCKET_UNLOCK(so, 1);
1863 soisconnected(stcb->sctp_socket);
1864 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1865 SCTP_SOCKET_UNLOCK(so, 1);
1868 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)
1869 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1871 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1872 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1873 } else if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
1874 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1876 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1878 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1879 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1880 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1881 stcb->sctp_ep, stcb, asoc->primary_destination);
1883 sctp_stop_all_cookie_timers(stcb);
1884 sctp_toss_old_cookies(stcb, asoc);
1885 sctp_send_cookie_ack(stcb);
1888 * only if we have retrans set do we do this. What
1889 * this call does is get only the COOKIE-ACK out and
1890 * then when we return the normal call to
1891 * sctp_chunk_output will get the retrans out behind
1894 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1896 if (how_indx < sizeof(asoc->cookie_how))
1897 asoc->cookie_how[how_indx] = 11;
1901 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1902 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1903 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1904 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1905 cookie->tie_tag_peer_vtag != 0) {
1906 struct sctpasochead *head;
1907 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1911 if (asoc->peer_supports_nat) {
1913 * This is a gross gross hack. Just call the
1914 * cookie_new code since we are allowing a duplicate
1915 * association. I hope this works...
1917 return (sctp_process_cookie_new(m, iphlen, offset, src, dst,
1918 sh, cookie, cookie_len,
1919 inp, netp, init_src, notification,
1920 auth_skipped, auth_offset, auth_len,
1925 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1928 if (how_indx < sizeof(asoc->cookie_how))
1929 asoc->cookie_how[how_indx] = 12;
1930 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net,
1931 SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
1932 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1933 SCTP_FROM_SCTP_INPUT + SCTP_LOC_17);
1935 /* notify upper layer */
1936 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1937 atomic_add_int(&stcb->asoc.refcnt, 1);
1938 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_OPEN) &&
1939 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1940 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) {
1941 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1943 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
1944 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1945 } else if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) {
1946 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1948 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1949 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1950 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1951 stcb->sctp_ep, stcb, asoc->primary_destination);
1953 } else if (!(asoc->state & SCTP_STATE_SHUTDOWN_SENT)) {
1954 /* move to OPEN state, if not in SHUTDOWN_SENT */
1955 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
1957 asoc->pre_open_streams =
1958 ntohs(initack_cp->init.num_outbound_streams);
1959 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1960 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1961 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1963 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1965 asoc->str_reset_seq_in = asoc->init_seq_number;
1967 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1968 if (asoc->mapping_array) {
1969 memset(asoc->mapping_array, 0,
1970 asoc->mapping_array_size);
1972 if (asoc->nr_mapping_array) {
1973 memset(asoc->nr_mapping_array, 0,
1974 asoc->mapping_array_size);
1976 SCTP_TCB_UNLOCK(stcb);
1977 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
1978 so = SCTP_INP_SO(stcb->sctp_ep);
1979 SCTP_SOCKET_LOCK(so, 1);
1981 SCTP_INP_INFO_WLOCK();
1982 SCTP_INP_WLOCK(stcb->sctp_ep);
1983 SCTP_TCB_LOCK(stcb);
1984 atomic_add_int(&stcb->asoc.refcnt, -1);
1985 /* send up all the data */
1986 SCTP_TCB_SEND_LOCK(stcb);
1988 sctp_report_all_outbound(stcb, 0, 1, SCTP_SO_LOCKED);
1989 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1990 stcb->asoc.strmout[i].chunks_on_queues = 0;
1991 #if defined(SCTP_DETAILED_STR_STATS)
1992 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1993 asoc->strmout[i].abandoned_sent[j] = 0;
1994 asoc->strmout[i].abandoned_unsent[j] = 0;
1997 asoc->strmout[i].abandoned_sent[0] = 0;
1998 asoc->strmout[i].abandoned_unsent[0] = 0;
2000 stcb->asoc.strmout[i].sid = i;
2001 stcb->asoc.strmout[i].next_mid_ordered = 0;
2002 stcb->asoc.strmout[i].next_mid_unordered = 0;
2003 stcb->asoc.strmout[i].last_msg_incomplete = 0;
2005 /* process the INIT-ACK info (my info) */
2006 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2007 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2009 /* pull from vtag hash */
2010 LIST_REMOVE(stcb, sctp_asocs);
2011 /* re-insert to new vtag position */
2012 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
2013 SCTP_BASE_INFO(hashasocmark))];
2015 * put it in the bucket in the vtag hash of assoc's for the
2018 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
2020 SCTP_TCB_SEND_UNLOCK(stcb);
2021 SCTP_INP_WUNLOCK(stcb->sctp_ep);
2022 SCTP_INP_INFO_WUNLOCK();
2023 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2024 SCTP_SOCKET_UNLOCK(so, 1);
2026 asoc->total_flight = 0;
2027 asoc->total_flight_count = 0;
2028 /* process the INIT info (peer's info) */
2029 retval = sctp_process_init(init_cp, stcb);
2031 if (how_indx < sizeof(asoc->cookie_how))
2032 asoc->cookie_how[how_indx] = 13;
2037 * since we did not send a HB make sure we don't double
2040 net->hb_responded = 1;
2042 if (sctp_load_addresses_from_init(stcb, m,
2043 init_offset + sizeof(struct sctp_init_chunk),
2044 initack_offset, src, dst, init_src, stcb->asoc.port)) {
2045 if (how_indx < sizeof(asoc->cookie_how))
2046 asoc->cookie_how[how_indx] = 14;
2050 /* respond with a COOKIE-ACK */
2051 sctp_stop_all_cookie_timers(stcb);
2052 sctp_toss_old_cookies(stcb, asoc);
2053 sctp_send_cookie_ack(stcb);
2054 if (how_indx < sizeof(asoc->cookie_how))
2055 asoc->cookie_how[how_indx] = 15;
2059 if (how_indx < sizeof(asoc->cookie_how))
2060 asoc->cookie_how[how_indx] = 16;
2061 /* all other cases... */
2067 * handle a state cookie for a new association m: input packet mbuf chain--
2068 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
2069 * and the cookie signature does not exist offset: offset into mbuf to the
2070 * cookie-echo chunk length: length of the cookie chunk to: where the init
2071 * was from returns a new TCB
2073 static struct sctp_tcb *
2074 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
2075 struct sockaddr *src, struct sockaddr *dst,
2076 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
2077 struct sctp_inpcb *inp, struct sctp_nets **netp,
2078 struct sockaddr *init_src, int *notification,
2079 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2080 uint8_t mflowtype, uint32_t mflowid,
2081 uint32_t vrf_id, uint16_t port)
2083 struct sctp_tcb *stcb;
2084 struct sctp_init_chunk *init_cp, init_buf;
2085 struct sctp_init_ack_chunk *initack_cp, initack_buf;
2086 union sctp_sockstore store;
2087 struct sctp_association *asoc;
2088 int init_offset, initack_offset, initack_limit;
2091 uint8_t auth_chunk_buf[SCTP_PARAM_BUFFER_SIZE];
2092 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2095 so = SCTP_INP_SO(inp);
2099 * find and validate the INIT chunk in the cookie (peer's info) the
2100 * INIT should start after the cookie-echo header struct (chunk
2101 * header, state cookie header struct)
2103 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
2104 init_cp = (struct sctp_init_chunk *)
2105 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
2106 (uint8_t *)&init_buf);
2107 if (init_cp == NULL) {
2108 /* could not pull a INIT chunk in cookie */
2109 SCTPDBG(SCTP_DEBUG_INPUT1,
2110 "process_cookie_new: could not pull INIT chunk hdr\n");
2113 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
2114 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
2117 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
2119 * find and validate the INIT-ACK chunk in the cookie (my info) the
2120 * INIT-ACK follows the INIT chunk
2122 initack_cp = (struct sctp_init_ack_chunk *)
2123 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
2124 (uint8_t *)&initack_buf);
2125 if (initack_cp == NULL) {
2126 /* could not pull INIT-ACK chunk in cookie */
2127 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
2130 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
2134 * NOTE: We can't use the INIT_ACK's chk_length to determine the
2135 * "initack_limit" value. This is because the chk_length field
2136 * includes the length of the cookie, but the cookie is omitted when
2137 * the INIT and INIT_ACK are tacked onto the cookie...
2139 initack_limit = offset + cookie_len;
2142 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2147 * Here we do a trick, we set in NULL for the proc/thread argument.
2148 * We do this since in effect we only use the p argument when the
2149 * socket is unbound and we must do an implicit bind. Since we are
2150 * getting a cookie, we cannot be unbound.
2152 stcb = sctp_aloc_assoc(inp, init_src, &error,
2153 ntohl(initack_cp->init.initiate_tag), vrf_id,
2154 ntohs(initack_cp->init.num_outbound_streams),
2156 (struct thread *)NULL
2159 struct mbuf *op_err;
2161 /* memory problem? */
2162 SCTPDBG(SCTP_DEBUG_INPUT1,
2163 "process_cookie_new: no room for another TCB!\n");
2164 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2165 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2166 src, dst, sh, op_err,
2171 /* get the correct sctp_nets */
2173 *netp = sctp_findnet(stcb, init_src);
2176 /* get scope variables out of cookie */
2177 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2178 asoc->scope.site_scope = cookie->site_scope;
2179 asoc->scope.local_scope = cookie->local_scope;
2180 asoc->scope.loopback_scope = cookie->loopback_scope;
2182 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2183 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2184 struct mbuf *op_err;
2187 * Houston we have a problem. The EP changed while the
2188 * cookie was in flight. Only recourse is to abort the
2191 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2192 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2193 src, dst, sh, op_err,
2196 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2197 atomic_add_int(&stcb->asoc.refcnt, 1);
2198 SCTP_TCB_UNLOCK(stcb);
2199 SCTP_SOCKET_LOCK(so, 1);
2200 SCTP_TCB_LOCK(stcb);
2201 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2203 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2204 SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2205 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2206 SCTP_SOCKET_UNLOCK(so, 1);
2210 /* process the INIT-ACK info (my info) */
2211 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
2212 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2213 asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
2214 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
2215 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
2216 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
2217 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
2218 asoc->str_reset_seq_in = asoc->init_seq_number;
2220 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
2222 /* process the INIT info (peer's info) */
2224 retval = sctp_process_init(init_cp, stcb);
2228 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2229 atomic_add_int(&stcb->asoc.refcnt, 1);
2230 SCTP_TCB_UNLOCK(stcb);
2231 SCTP_SOCKET_LOCK(so, 1);
2232 SCTP_TCB_LOCK(stcb);
2233 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2235 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2236 SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2237 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2238 SCTP_SOCKET_UNLOCK(so, 1);
2242 /* load all addresses */
2243 if (sctp_load_addresses_from_init(stcb, m,
2244 init_offset + sizeof(struct sctp_init_chunk), initack_offset,
2245 src, dst, init_src, port)) {
2246 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2247 atomic_add_int(&stcb->asoc.refcnt, 1);
2248 SCTP_TCB_UNLOCK(stcb);
2249 SCTP_SOCKET_LOCK(so, 1);
2250 SCTP_TCB_LOCK(stcb);
2251 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2253 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2254 SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2255 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2256 SCTP_SOCKET_UNLOCK(so, 1);
2261 * verify any preceding AUTH chunk that was skipped
2263 /* pull the local authentication parameters from the cookie/init-ack */
2264 sctp_auth_get_cookie_params(stcb, m,
2265 initack_offset + sizeof(struct sctp_init_ack_chunk),
2266 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2268 struct sctp_auth_chunk *auth;
2270 auth = (struct sctp_auth_chunk *)
2271 sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2272 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2273 /* auth HMAC failed, dump the assoc and packet */
2274 SCTPDBG(SCTP_DEBUG_AUTH1,
2275 "COOKIE-ECHO: AUTH failed\n");
2276 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2277 atomic_add_int(&stcb->asoc.refcnt, 1);
2278 SCTP_TCB_UNLOCK(stcb);
2279 SCTP_SOCKET_LOCK(so, 1);
2280 SCTP_TCB_LOCK(stcb);
2281 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2283 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2284 SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
2285 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2286 SCTP_SOCKET_UNLOCK(so, 1);
2290 /* remaining chunks checked... good to go */
2291 stcb->asoc.authenticated = 1;
2295 * if we're doing ASCONFs, check to see if we have any new local
2296 * addresses that need to get added to the peer (eg. addresses
2297 * changed while cookie echo in flight). This needs to be done
2298 * after we go to the OPEN state to do the correct asconf
2299 * processing. else, make sure we have the correct addresses in our
2303 /* warning, we re-use sin, sin6, sa_store here! */
2304 /* pull in local_address (our "from" address) */
2305 switch (cookie->laddr_type) {
2307 case SCTP_IPV4_ADDRESS:
2308 /* source addr is IPv4 */
2309 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2310 store.sin.sin_family = AF_INET;
2311 store.sin.sin_len = sizeof(struct sockaddr_in);
2312 store.sin.sin_addr.s_addr = cookie->laddress[0];
2316 case SCTP_IPV6_ADDRESS:
2317 /* source addr is IPv6 */
2318 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2319 store.sin6.sin6_family = AF_INET6;
2320 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2321 store.sin6.sin6_scope_id = cookie->scope_id;
2322 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2326 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2327 atomic_add_int(&stcb->asoc.refcnt, 1);
2328 SCTP_TCB_UNLOCK(stcb);
2329 SCTP_SOCKET_LOCK(so, 1);
2330 SCTP_TCB_LOCK(stcb);
2331 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2333 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2334 SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
2335 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2336 SCTP_SOCKET_UNLOCK(so, 1);
2341 /* update current state */
2342 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2343 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
2344 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2345 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2346 stcb->sctp_ep, stcb, asoc->primary_destination);
2348 sctp_stop_all_cookie_timers(stcb);
2349 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2350 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2352 /* set up to notify upper layer */
2353 *notification = SCTP_NOTIFY_ASSOC_UP;
2354 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2355 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2356 (!SCTP_IS_LISTENING(inp))) {
2358 * This is an endpoint that called connect() how it got a
2359 * cookie that is NEW is a bit of a mystery. It must be that
2360 * the INIT was sent, but before it got there.. a complete
2361 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2362 * should have went to the other code.. not here.. oh well..
2363 * a bit of protection is worth having..
2365 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2366 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2367 atomic_add_int(&stcb->asoc.refcnt, 1);
2368 SCTP_TCB_UNLOCK(stcb);
2369 SCTP_SOCKET_LOCK(so, 1);
2370 SCTP_TCB_LOCK(stcb);
2371 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2372 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2373 SCTP_SOCKET_UNLOCK(so, 1);
2377 soisconnected(stcb->sctp_socket);
2378 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2379 SCTP_SOCKET_UNLOCK(so, 1);
2381 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2382 (SCTP_IS_LISTENING(inp))) {
2384 * We don't want to do anything with this one. Since it is
2385 * the listening guy. The timer will get started for
2386 * accepted connections in the caller.
2390 /* since we did not send a HB make sure we don't double things */
2391 if ((netp) && (*netp))
2392 (*netp)->hb_responded = 1;
2394 if (stcb->asoc.sctp_autoclose_ticks &&
2395 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2396 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2398 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2399 if ((netp != NULL) && (*netp != NULL)) {
2402 /* calculate the RTT and set the encaps port */
2403 old.tv_sec = cookie->time_entered.tv_sec;
2404 old.tv_usec = cookie->time_entered.tv_usec;
2405 (*netp)->RTO = sctp_calculate_rto(stcb, asoc, *netp,
2406 &old, SCTP_RTT_FROM_NON_DATA);
2408 /* respond with a COOKIE-ACK */
2409 sctp_send_cookie_ack(stcb);
2412 * check the address lists for any ASCONFs that need to be sent
2413 * AFTER the cookie-ack is sent
2415 sctp_check_address_list(stcb, m,
2416 initack_offset + sizeof(struct sctp_init_ack_chunk),
2417 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2418 &store.sa, cookie->local_scope, cookie->site_scope,
2419 cookie->ipv4_scope, cookie->loopback_scope);
2426 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2427 * we NEED to make sure we are not already using the vtag. If so we
2428 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2429 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2430 SCTP_BASE_INFO(hashasocmark))];
2431 LIST_FOREACH(stcb, head, sctp_asocs) {
2432 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2433 -- SEND ABORT - TRY AGAIN --
2439 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2440 * existing (non-NULL) TCB
2442 static struct mbuf *
2443 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2444 struct sockaddr *src, struct sockaddr *dst,
2445 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2446 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2447 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2448 struct sctp_tcb **locked_tcb,
2449 uint8_t mflowtype, uint32_t mflowid,
2450 uint32_t vrf_id, uint16_t port)
2452 struct sctp_state_cookie *cookie;
2453 struct sctp_tcb *l_stcb = *stcb;
2454 struct sctp_inpcb *l_inp;
2455 struct sockaddr *to;
2456 struct sctp_pcb *ep;
2458 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2460 uint8_t cookie_ok = 0;
2461 unsigned int sig_offset, cookie_offset;
2462 unsigned int cookie_len;
2464 struct timeval time_expires;
2465 int notification = 0;
2466 struct sctp_nets *netl;
2467 int had_a_existing_tcb = 0;
2468 int send_int_conf = 0;
2470 struct sockaddr_in sin;
2473 struct sockaddr_in6 sin6;
2476 SCTPDBG(SCTP_DEBUG_INPUT2,
2477 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2479 if (inp_p == NULL) {
2482 cookie = &cp->cookie;
2483 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2484 cookie_len = ntohs(cp->ch.chunk_length);
2486 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2487 sizeof(struct sctp_init_chunk) +
2488 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2489 /* cookie too small */
2492 if ((cookie->peerport != sh->src_port) ||
2493 (cookie->myport != sh->dest_port) ||
2494 (cookie->my_vtag != sh->v_tag)) {
2496 * invalid ports or bad tag. Note that we always leave the
2497 * v_tag in the header in network order and when we stored
2498 * it in the my_vtag slot we also left it in network order.
2499 * This maintains the match even though it may be in the
2500 * opposite byte order of the machine :->
2505 * split off the signature into its own mbuf (since it should not be
2506 * calculated in the sctp_hmac_m() call).
2508 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2509 m_sig = m_split(m, sig_offset, M_NOWAIT);
2510 if (m_sig == NULL) {
2511 /* out of memory or ?? */
2514 #ifdef SCTP_MBUF_LOGGING
2515 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2516 sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
2521 * compute the signature/digest for the cookie
2523 ep = &(*inp_p)->sctp_ep;
2526 SCTP_TCB_UNLOCK(l_stcb);
2528 SCTP_INP_RLOCK(l_inp);
2530 SCTP_TCB_LOCK(l_stcb);
2532 /* which cookie is it? */
2533 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2534 (ep->current_secret_number != ep->last_secret_number)) {
2535 /* it's the old cookie */
2536 (void)sctp_hmac_m(SCTP_HMAC,
2537 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2538 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2540 /* it's the current cookie */
2541 (void)sctp_hmac_m(SCTP_HMAC,
2542 (uint8_t *)ep->secret_key[(int)ep->current_secret_number],
2543 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2545 /* get the signature */
2546 SCTP_INP_RUNLOCK(l_inp);
2547 sig = (uint8_t *)sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *)&tmp_sig);
2549 /* couldn't find signature */
2550 sctp_m_freem(m_sig);
2553 /* compare the received digest with the computed digest */
2554 if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2555 /* try the old cookie? */
2556 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2557 (ep->current_secret_number != ep->last_secret_number)) {
2558 /* compute digest with old */
2559 (void)sctp_hmac_m(SCTP_HMAC,
2560 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2561 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2563 if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2571 * Now before we continue we must reconstruct our mbuf so that
2572 * normal processing of any other chunks will work.
2578 while (SCTP_BUF_NEXT(m_at) != NULL) {
2579 m_at = SCTP_BUF_NEXT(m_at);
2581 SCTP_BUF_NEXT(m_at) = m_sig;
2584 if (cookie_ok == 0) {
2585 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2586 SCTPDBG(SCTP_DEBUG_INPUT2,
2587 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2588 (uint32_t)offset, cookie_offset, sig_offset);
2592 * check the cookie timestamps to be sure it's not stale
2594 (void)SCTP_GETTIME_TIMEVAL(&now);
2595 /* Expire time is in Ticks, so we convert to seconds */
2596 time_expires.tv_sec = cookie->time_entered.tv_sec + TICKS_TO_SEC(cookie->cookie_life);
2597 time_expires.tv_usec = cookie->time_entered.tv_usec;
2598 if (timevalcmp(&now, &time_expires, >)) {
2599 /* cookie is stale! */
2600 struct mbuf *op_err;
2601 struct sctp_error_stale_cookie *cause;
2602 struct timeval diff;
2605 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
2606 0, M_NOWAIT, 1, MT_DATA);
2607 if (op_err == NULL) {
2612 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
2613 cause = mtod(op_err, struct sctp_error_stale_cookie *);
2614 cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
2615 cause->cause.length = htons((sizeof(struct sctp_paramhdr) +
2616 (sizeof(uint32_t))));
2618 timevalsub(&diff, &time_expires);
2619 if (diff.tv_sec > UINT32_MAX / 1000000) {
2620 staleness = UINT32_MAX;
2622 staleness = diff.tv_sec * 1000000;
2624 if (UINT32_MAX - staleness >= (uint32_t)diff.tv_usec) {
2625 staleness += diff.tv_usec;
2627 staleness = UINT32_MAX;
2629 cause->stale_time = htonl(staleness);
2630 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2631 mflowtype, mflowid, l_inp->fibnum,
2636 * Now we must see with the lookup address if we have an existing
2637 * asoc. This will only happen if we were in the COOKIE-WAIT state
2638 * and a INIT collided with us and somewhere the peer sent the
2639 * cookie on another address besides the single address our assoc
2640 * had for him. In this case we will have one of the tie-tags set at
2641 * least AND the address field in the cookie can be used to look it
2645 switch (cookie->addr_type) {
2647 case SCTP_IPV6_ADDRESS:
2648 memset(&sin6, 0, sizeof(sin6));
2649 sin6.sin6_family = AF_INET6;
2650 sin6.sin6_len = sizeof(sin6);
2651 sin6.sin6_port = sh->src_port;
2652 sin6.sin6_scope_id = cookie->scope_id;
2653 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2654 sizeof(sin6.sin6_addr.s6_addr));
2655 to = (struct sockaddr *)&sin6;
2659 case SCTP_IPV4_ADDRESS:
2660 memset(&sin, 0, sizeof(sin));
2661 sin.sin_family = AF_INET;
2662 sin.sin_len = sizeof(sin);
2663 sin.sin_port = sh->src_port;
2664 sin.sin_addr.s_addr = cookie->address[0];
2665 to = (struct sockaddr *)&sin;
2669 /* This should not happen */
2672 if (*stcb == NULL) {
2673 /* Yep, lets check */
2674 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2675 if (*stcb == NULL) {
2677 * We should have only got back the same inp. If we
2678 * got back a different ep we have a problem. The
2679 * original findep got back l_inp and now
2681 if (l_inp != *inp_p) {
2682 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2685 if (*locked_tcb == NULL) {
2687 * In this case we found the assoc only
2688 * after we locked the create lock. This
2689 * means we are in a colliding case and we
2690 * must make sure that we unlock the tcb if
2691 * its one of the cases where we throw away
2692 * the incoming packets.
2694 *locked_tcb = *stcb;
2697 * We must also increment the inp ref count
2698 * since the ref_count flags was set when we
2699 * did not find the TCB, now we found it
2700 * which reduces the refcount.. we must
2701 * raise it back out to balance it all :-)
2703 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2704 if ((*stcb)->sctp_ep != l_inp) {
2705 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2706 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2711 cookie_len -= SCTP_SIGNATURE_SIZE;
2712 if (*stcb == NULL) {
2713 /* this is the "normal" case... get a new TCB */
2714 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2715 cookie, cookie_len, *inp_p,
2716 netp, to, ¬ification,
2717 auth_skipped, auth_offset, auth_len,
2721 /* this is abnormal... cookie-echo on existing TCB */
2722 had_a_existing_tcb = 1;
2723 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2725 cookie, cookie_len, *inp_p, *stcb, netp, to,
2726 ¬ification, auth_skipped, auth_offset, auth_len,
2731 if (*stcb == NULL) {
2732 /* still no TCB... must be bad cookie-echo */
2735 if (*netp != NULL) {
2736 (*netp)->flowtype = mflowtype;
2737 (*netp)->flowid = mflowid;
2740 * Ok, we built an association so confirm the address we sent the
2743 netl = sctp_findnet(*stcb, to);
2745 * This code should in theory NOT run but
2748 /* TSNH! Huh, why do I need to add this address here? */
2749 if (sctp_add_remote_addr(*stcb, to, NULL, port,
2750 SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2753 netl = sctp_findnet(*stcb, to);
2756 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2757 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2758 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2763 sctp_start_net_timers(*stcb);
2764 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2765 if (!had_a_existing_tcb ||
2766 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2768 * If we have a NEW cookie or the connect never
2769 * reached the connected state during collision we
2770 * must do the TCP accept thing.
2772 struct socket *so, *oso;
2773 struct sctp_inpcb *inp;
2775 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2777 * For a restart we will keep the same
2778 * socket, no need to do anything. I THINK!!
2780 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2781 if (send_int_conf) {
2782 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2783 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2787 oso = (*inp_p)->sctp_socket;
2788 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2789 SCTP_TCB_UNLOCK((*stcb));
2790 CURVNET_SET(oso->so_vnet);
2791 so = sonewconn(oso, 0
2794 SCTP_TCB_LOCK((*stcb));
2795 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2798 struct mbuf *op_err;
2799 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2800 struct socket *pcb_so;
2802 /* Too many sockets */
2803 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2804 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2805 sctp_abort_association(*inp_p, NULL, m, iphlen,
2806 src, dst, sh, op_err,
2809 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2810 pcb_so = SCTP_INP_SO(*inp_p);
2811 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2812 SCTP_TCB_UNLOCK((*stcb));
2813 SCTP_SOCKET_LOCK(pcb_so, 1);
2814 SCTP_TCB_LOCK((*stcb));
2815 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2817 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2818 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2819 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2820 SCTP_SOCKET_UNLOCK(pcb_so, 1);
2824 inp = (struct sctp_inpcb *)so->so_pcb;
2825 SCTP_INP_INCR_REF(inp);
2827 * We add the unbound flag here so that if we get an
2828 * soabort() before we get the move_pcb done, we
2829 * will properly cleanup.
2831 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2832 SCTP_PCB_FLAGS_CONNECTED |
2833 SCTP_PCB_FLAGS_IN_TCPPOOL |
2834 SCTP_PCB_FLAGS_UNBOUND |
2835 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2836 SCTP_PCB_FLAGS_DONT_WAKE);
2837 inp->sctp_features = (*inp_p)->sctp_features;
2838 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2839 inp->sctp_socket = so;
2840 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2841 inp->max_cwnd = (*inp_p)->max_cwnd;
2842 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2843 inp->ecn_supported = (*inp_p)->ecn_supported;
2844 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2845 inp->auth_supported = (*inp_p)->auth_supported;
2846 inp->asconf_supported = (*inp_p)->asconf_supported;
2847 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2848 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2849 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2850 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2851 inp->sctp_context = (*inp_p)->sctp_context;
2852 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2853 inp->fibnum = (*inp_p)->fibnum;
2854 inp->inp_starting_point_for_iterator = NULL;
2856 * copy in the authentication parameters from the
2859 if (inp->sctp_ep.local_hmacs)
2860 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2861 inp->sctp_ep.local_hmacs =
2862 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2863 if (inp->sctp_ep.local_auth_chunks)
2864 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2865 inp->sctp_ep.local_auth_chunks =
2866 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2869 * Now we must move it from one hash table to
2870 * another and get the tcb in the right place.
2874 * This is where the one-2-one socket is put into
2875 * the accept state waiting for the accept!
2878 (*stcb)->asoc.state |= SCTP_STATE_IN_ACCEPT_QUEUE;
2880 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2882 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2883 SCTP_TCB_UNLOCK((*stcb));
2885 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2887 SCTP_TCB_LOCK((*stcb));
2888 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2892 * now we must check to see if we were aborted while
2893 * the move was going on and the lock/unlock
2896 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2898 * yep it was, we leave the assoc attached
2899 * to the socket since the sctp_inpcb_free()
2900 * call will send an abort for us.
2902 SCTP_INP_DECR_REF(inp);
2905 SCTP_INP_DECR_REF(inp);
2906 /* Switch over to the new guy */
2908 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2909 if (send_int_conf) {
2910 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2911 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2914 * Pull it from the incomplete queue and wake the
2917 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2918 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2919 SCTP_TCB_UNLOCK((*stcb));
2920 SCTP_SOCKET_LOCK(so, 1);
2923 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2924 SCTP_TCB_LOCK((*stcb));
2925 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2926 SCTP_SOCKET_UNLOCK(so, 1);
2932 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2934 if (send_int_conf) {
2935 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2936 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2942 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2943 struct sctp_tcb *stcb, struct sctp_nets *net)
2945 /* cp must not be used, others call this without a c-ack :-) */
2946 struct sctp_association *asoc;
2948 SCTPDBG(SCTP_DEBUG_INPUT2,
2949 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2950 if ((stcb == NULL) || (net == NULL)) {
2954 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
2955 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
2956 asoc->overall_error_count,
2958 SCTP_FROM_SCTP_INPUT,
2961 asoc->overall_error_count = 0;
2962 sctp_stop_all_cookie_timers(stcb);
2963 /* process according to association state */
2964 if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) {
2965 /* state change only needed when I am in right state */
2966 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2967 SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
2968 sctp_start_net_timers(stcb);
2969 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2970 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2971 stcb->sctp_ep, stcb, asoc->primary_destination);
2975 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2976 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2977 if (asoc->overall_error_count == 0) {
2978 net->RTO = sctp_calculate_rto(stcb, asoc, net,
2979 &asoc->time_entered,
2980 SCTP_RTT_FROM_NON_DATA);
2982 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2983 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2984 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2985 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2986 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2990 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2991 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
2992 so = SCTP_INP_SO(stcb->sctp_ep);
2993 atomic_add_int(&stcb->asoc.refcnt, 1);
2994 SCTP_TCB_UNLOCK(stcb);
2995 SCTP_SOCKET_LOCK(so, 1);
2996 SCTP_TCB_LOCK(stcb);
2997 atomic_subtract_int(&stcb->asoc.refcnt, 1);
2999 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
3000 soisconnected(stcb->sctp_socket);
3002 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3003 SCTP_SOCKET_UNLOCK(so, 1);
3007 * since we did not send a HB make sure we don't double
3010 net->hb_responded = 1;
3012 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
3014 * We don't need to do the asconf thing, nor hb or
3015 * autoclose if the socket is closed.
3019 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
3023 if (stcb->asoc.sctp_autoclose_ticks &&
3024 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
3025 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
3026 stcb->sctp_ep, stcb, NULL);
3029 * send ASCONF if parameters are pending and ASCONFs are
3030 * allowed (eg. addresses changed when init/cookie echo were
3033 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
3034 (stcb->asoc.asconf_supported == 1) &&
3035 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
3036 #ifdef SCTP_TIMER_BASED_ASCONF
3037 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
3038 stcb->sctp_ep, stcb,
3039 stcb->asoc.primary_destination);
3041 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
3042 SCTP_ADDR_NOT_LOCKED);
3047 /* Toss the cookie if I can */
3048 sctp_toss_old_cookies(stcb, asoc);
3049 if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3050 /* Restart the timer if we have pending data */
3051 struct sctp_tmit_chunk *chk;
3053 chk = TAILQ_FIRST(&asoc->sent_queue);
3054 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
3059 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
3060 struct sctp_tcb *stcb)
3062 struct sctp_nets *net;
3063 struct sctp_tmit_chunk *lchk;
3064 struct sctp_ecne_chunk bkup;
3065 uint8_t override_bit;
3066 uint32_t tsn, window_data_tsn;
3068 unsigned int pkt_cnt;
3070 len = ntohs(cp->ch.chunk_length);
3071 if ((len != sizeof(struct sctp_ecne_chunk)) &&
3072 (len != sizeof(struct old_sctp_ecne_chunk))) {
3075 if (len == sizeof(struct old_sctp_ecne_chunk)) {
3076 /* Its the old format */
3077 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
3078 bkup.num_pkts_since_cwr = htonl(1);
3081 SCTP_STAT_INCR(sctps_recvecne);
3082 tsn = ntohl(cp->tsn);
3083 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
3084 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
3086 window_data_tsn = stcb->asoc.sending_seq - 1;
3088 window_data_tsn = lchk->rec.data.tsn;
3091 /* Find where it was sent to if possible. */
3093 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
3094 if (lchk->rec.data.tsn == tsn) {
3096 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
3099 if (SCTP_TSN_GT(lchk->rec.data.tsn, tsn)) {
3105 * What to do. A previous send of a CWR was possibly lost.
3106 * See how old it is, we may have it marked on the actual
3109 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3110 if (tsn == net->last_cwr_tsn) {
3111 /* Found him, send it off */
3117 * If we reach here, we need to send a special CWR
3118 * that says hey, we did this a long time ago and
3119 * you lost the response.
3121 net = TAILQ_FIRST(&stcb->asoc.nets);
3126 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
3133 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
3134 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3136 * JRS - Use the congestion control given in the pluggable
3139 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
3141 * We reduce once every RTT. So we will only lower cwnd at
3142 * the next sending seq i.e. the window_data_tsn
3144 net->cwr_window_tsn = window_data_tsn;
3145 net->ecn_ce_pkt_cnt += pkt_cnt;
3146 net->lost_cnt = pkt_cnt;
3147 net->last_cwr_tsn = tsn;
3149 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
3150 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
3151 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
3153 * Another loss in the same window update how many
3154 * marks/packets lost we have had.
3158 if (pkt_cnt > net->lost_cnt) {
3159 /* Should be the case */
3160 cnt = (pkt_cnt - net->lost_cnt);
3161 net->ecn_ce_pkt_cnt += cnt;
3163 net->lost_cnt = pkt_cnt;
3164 net->last_cwr_tsn = tsn;
3166 * Most CC functions will ignore this call, since we
3167 * are in-window yet of the initial CE the peer saw.
3169 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
3173 * We always send a CWR this way if our previous one was lost our
3174 * peer will get an update, or if it is not time again to reduce we
3175 * still get the cwr to the peer. Note we set the override when we
3176 * could not find the TSN on the chunk or the destination network.
3178 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
3182 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
3185 * Here we get a CWR from the peer. We must look in the outqueue and
3186 * make sure that we have a covered ECNE in the control chunk part.
3189 struct sctp_tmit_chunk *chk, *nchk;
3190 struct sctp_ecne_chunk *ecne;
3194 cwr_tsn = ntohl(cp->tsn);
3195 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
3196 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.control_send_queue, sctp_next, nchk) {
3197 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
3200 if ((override == 0) && (chk->whoTo != net)) {
3201 /* Must be from the right src unless override is set */
3204 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
3205 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
3206 /* this covers this ECNE, we can remove it */
3207 stcb->asoc.ecn_echo_cnt_onq--;
3208 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
3210 stcb->asoc.ctrl_queue_cnt--;
3211 sctp_m_freem(chk->data);
3213 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3214 if (override == 0) {
3222 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3223 struct sctp_tcb *stcb, struct sctp_nets *net)
3225 struct sctp_association *asoc;
3226 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3230 SCTPDBG(SCTP_DEBUG_INPUT2,
3231 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3236 /* process according to association state */
3237 if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3238 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3239 SCTPDBG(SCTP_DEBUG_INPUT2,
3240 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3241 SCTP_TCB_UNLOCK(stcb);
3244 /* notify upper layer protocol */
3245 if (stcb->sctp_socket) {
3246 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3249 if (!TAILQ_EMPTY(&asoc->send_queue) ||
3250 !TAILQ_EMPTY(&asoc->sent_queue) ||
3251 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
3252 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3255 /* stop the timer */
3256 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3257 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3258 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3260 SCTPDBG(SCTP_DEBUG_INPUT2,
3261 "sctp_handle_shutdown_complete: calls free-asoc\n");
3262 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3263 so = SCTP_INP_SO(stcb->sctp_ep);
3264 atomic_add_int(&stcb->asoc.refcnt, 1);
3265 SCTP_TCB_UNLOCK(stcb);
3266 SCTP_SOCKET_LOCK(so, 1);
3267 SCTP_TCB_LOCK(stcb);
3268 atomic_subtract_int(&stcb->asoc.refcnt, 1);
3270 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3271 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3272 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3273 SCTP_SOCKET_UNLOCK(so, 1);
3279 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3280 struct sctp_nets *net, uint8_t flg)
3282 switch (desc->chunk_type) {
3284 /* find the tsn to resend (possibly */
3287 struct sctp_tmit_chunk *tp1;
3289 tsn = ntohl(desc->tsn_ifany);
3290 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3291 if (tp1->rec.data.tsn == tsn) {
3295 if (SCTP_TSN_GT(tp1->rec.data.tsn, tsn)) {
3303 * Do it the other way , aka without paying
3304 * attention to queue seq order.
3306 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3307 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3308 if (tp1->rec.data.tsn == tsn) {
3315 SCTP_STAT_INCR(sctps_pdrptsnnf);
3317 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3320 if (((flg & SCTP_BADCRC) == 0) &&
3321 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3324 if ((stcb->asoc.peers_rwnd == 0) &&
3325 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3326 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3329 if (stcb->asoc.peers_rwnd == 0 &&
3330 (flg & SCTP_FROM_MIDDLE_BOX)) {
3331 SCTP_STAT_INCR(sctps_pdrpdizrw);
3334 ddp = (uint8_t *)(mtod(tp1->data, caddr_t)+
3335 sizeof(struct sctp_data_chunk));
3339 for (iii = 0; iii < sizeof(desc->data_bytes);
3341 if (ddp[iii] != desc->data_bytes[iii]) {
3342 SCTP_STAT_INCR(sctps_pdrpbadd);
3350 * this guy had a RTO calculation
3351 * pending on it, cancel it
3353 if (tp1->whoTo->rto_needed == 0) {
3354 tp1->whoTo->rto_needed = 1;
3358 SCTP_STAT_INCR(sctps_pdrpmark);
3359 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3360 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3362 * mark it as if we were doing a FR, since
3363 * we will be getting gap ack reports behind
3364 * the info from the router.
3366 tp1->rec.data.doing_fast_retransmit = 1;
3368 * mark the tsn with what sequences can
3371 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3372 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3374 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
3377 /* restart the timer */
3378 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3380 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3381 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3384 /* fix counts and things */
3385 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3386 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3387 tp1->whoTo->flight_size,
3389 (uint32_t)(uintptr_t)stcb,
3392 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3393 sctp_flight_size_decrease(tp1);
3394 sctp_total_flight_decrease(stcb, tp1);
3396 tp1->sent = SCTP_DATAGRAM_RESEND;
3402 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3403 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3406 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3408 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3411 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3412 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3413 audit, stcb->asoc.sent_queue_retran_cnt);
3414 #ifndef SCTP_AUDITING_ENABLED
3415 stcb->asoc.sent_queue_retran_cnt = audit;
3423 struct sctp_tmit_chunk *asconf;
3425 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3427 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3432 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3433 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3434 asconf->sent = SCTP_DATAGRAM_RESEND;
3435 asconf->snd_count--;
3439 case SCTP_INITIATION:
3440 /* resend the INIT */
3441 stcb->asoc.dropped_special_cnt++;
3442 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3444 * If we can get it in, in a few attempts we do
3445 * this, otherwise we let the timer fire.
3447 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3449 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3450 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3453 case SCTP_SELECTIVE_ACK:
3454 case SCTP_NR_SELECTIVE_ACK:
3455 /* resend the sack */
3456 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3458 case SCTP_HEARTBEAT_REQUEST:
3459 /* resend a demand HB */
3460 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3462 * Only retransmit if we KNOW we wont destroy the
3465 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3469 sctp_send_shutdown(stcb, net);
3471 case SCTP_SHUTDOWN_ACK:
3472 sctp_send_shutdown_ack(stcb, net);
3474 case SCTP_COOKIE_ECHO:
3476 struct sctp_tmit_chunk *cookie;
3479 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3481 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3486 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3487 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3488 cookie->sent = SCTP_DATAGRAM_RESEND;
3489 sctp_stop_all_cookie_timers(stcb);
3493 case SCTP_COOKIE_ACK:
3494 sctp_send_cookie_ack(stcb);
3496 case SCTP_ASCONF_ACK:
3497 /* resend last asconf ack */
3498 sctp_send_asconf_ack(stcb);
3500 case SCTP_IFORWARD_CUM_TSN:
3501 case SCTP_FORWARD_CUM_TSN:
3502 send_forward_tsn(stcb, &stcb->asoc);
3504 /* can't do anything with these */
3505 case SCTP_PACKET_DROPPED:
3506 case SCTP_INITIATION_ACK: /* this should not happen */
3507 case SCTP_HEARTBEAT_ACK:
3508 case SCTP_ABORT_ASSOCIATION:
3509 case SCTP_OPERATION_ERROR:
3510 case SCTP_SHUTDOWN_COMPLETE:
3520 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3526 * We set things to 0xffffffff since this is the last delivered
3527 * sequence and we will be sending in 0 after the reset.
3530 if (number_entries) {
3531 for (i = 0; i < number_entries; i++) {
3532 temp = ntohs(list[i]);
3533 if (temp >= stcb->asoc.streamincnt) {
3536 stcb->asoc.strmin[temp].last_mid_delivered = 0xffffffff;
3540 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3541 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3544 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3548 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3553 if (number_entries > 0) {
3554 for (i = 0; i < number_entries; i++) {
3555 temp = ntohs(list[i]);
3556 if (temp >= stcb->asoc.streamoutcnt) {
3557 /* no such stream */
3560 stcb->asoc.strmout[temp].next_mid_ordered = 0;
3561 stcb->asoc.strmout[temp].next_mid_unordered = 0;
3564 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3565 stcb->asoc.strmout[i].next_mid_ordered = 0;
3566 stcb->asoc.strmout[i].next_mid_unordered = 0;
3569 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3573 sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3578 if (number_entries > 0) {
3579 for (i = 0; i < number_entries; i++) {
3580 temp = ntohs(list[i]);
3581 if (temp >= stcb->asoc.streamoutcnt) {
3582 /* no such stream */
3585 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3588 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3589 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3595 struct sctp_stream_reset_request *
3596 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3598 struct sctp_association *asoc;
3599 struct sctp_chunkhdr *ch;
3600 struct sctp_stream_reset_request *r;
3601 struct sctp_tmit_chunk *chk;
3605 if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
3606 asoc->stream_reset_outstanding = 0;
3609 if (stcb->asoc.str_reset == NULL) {
3610 asoc->stream_reset_outstanding = 0;
3613 chk = stcb->asoc.str_reset;
3614 if (chk->data == NULL) {
3618 /* he wants a copy of the chk pointer */
3621 clen = chk->send_size;
3622 ch = mtod(chk->data, struct sctp_chunkhdr *);
3623 r = (struct sctp_stream_reset_request *)(ch + 1);
3624 if (ntohl(r->request_seq) == seq) {
3628 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3629 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3630 /* move to the next one, there can only be a max of two */
3631 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3632 if (ntohl(r->request_seq) == seq) {
3636 /* that seq is not here */
3641 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3643 struct sctp_association *asoc;
3644 struct sctp_tmit_chunk *chk;
3647 chk = asoc->str_reset;
3651 asoc->str_reset = NULL;
3652 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3653 chk->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3654 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3655 asoc->ctrl_queue_cnt--;
3657 sctp_m_freem(chk->data);
3660 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3665 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3666 uint32_t seq, uint32_t action,
3667 struct sctp_stream_reset_response *respin)
3671 struct sctp_association *asoc = &stcb->asoc;
3672 struct sctp_tmit_chunk *chk;
3673 struct sctp_stream_reset_request *req_param;
3674 struct sctp_stream_reset_out_request *req_out_param;
3675 struct sctp_stream_reset_in_request *req_in_param;
3676 uint32_t number_entries;
3678 if (asoc->stream_reset_outstanding == 0) {
3682 if (seq == stcb->asoc.str_reset_seq_out) {
3683 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3684 if (req_param != NULL) {
3685 stcb->asoc.str_reset_seq_out++;
3686 type = ntohs(req_param->ph.param_type);
3687 lparam_len = ntohs(req_param->ph.param_length);
3688 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3691 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3692 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3693 asoc->stream_reset_out_is_outstanding = 0;
3694 if (asoc->stream_reset_outstanding)
3695 asoc->stream_reset_outstanding--;
3696 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3698 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3699 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3700 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3701 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3703 * Set it up so we don't stop
3706 asoc->stream_reset_outstanding++;
3707 stcb->asoc.str_reset_seq_out--;
3708 asoc->stream_reset_out_is_outstanding = 1;
3711 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3713 if (no_clear == 0) {
3714 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3716 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3717 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3718 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3719 if (asoc->stream_reset_outstanding)
3720 asoc->stream_reset_outstanding--;
3721 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3722 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3723 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3724 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3725 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3726 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3728 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3729 /* Ok we now may have more streams */
3732 num_stream = stcb->asoc.strm_pending_add_size;
3733 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3735 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3737 stcb->asoc.strm_pending_add_size = 0;
3738 if (asoc->stream_reset_outstanding)
3739 asoc->stream_reset_outstanding--;
3740 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3741 /* Put the new streams into effect */
3744 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3745 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3747 asoc->streamoutcnt += num_stream;
3748 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3749 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3750 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3751 SCTP_STREAM_CHANGE_DENIED);
3753 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3754 SCTP_STREAM_CHANGE_FAILED);
3756 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3757 if (asoc->stream_reset_outstanding)
3758 asoc->stream_reset_outstanding--;
3759 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3760 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3761 SCTP_STREAM_CHANGE_DENIED);
3762 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3763 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3764 SCTP_STREAM_CHANGE_FAILED);
3766 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3768 * a) Adopt the new in tsn.
3770 * c) Adopt the new out-tsn
3772 struct sctp_stream_reset_response_tsn *resp;
3773 struct sctp_forward_tsn_chunk fwdtsn;
3776 if (respin == NULL) {
3780 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3783 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3784 resp = (struct sctp_stream_reset_response_tsn *)respin;
3785 asoc->stream_reset_outstanding--;
3786 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3787 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3788 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3789 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3793 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3794 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3795 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3797 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3798 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3799 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3801 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3802 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3804 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3805 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3807 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3808 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3809 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3810 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3811 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3812 SCTP_ASSOC_RESET_DENIED);
3814 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3815 SCTP_ASSOC_RESET_FAILED);
3818 /* get rid of the request and get the request flags */
3819 if (asoc->stream_reset_outstanding == 0) {
3820 sctp_clean_up_stream_reset(stcb);
3824 if (asoc->stream_reset_outstanding == 0) {
3825 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3831 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3832 struct sctp_tmit_chunk *chk,
3833 struct sctp_stream_reset_in_request *req, int trunc)
3841 * peer wants me to send a str-reset to him for my outgoing seq's if
3844 struct sctp_association *asoc = &stcb->asoc;
3846 seq = ntohl(req->request_seq);
3847 if (asoc->str_reset_seq_in == seq) {
3848 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3849 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3850 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3852 /* Can't do it, since they exceeded our buffer size */
3853 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3854 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3855 len = ntohs(req->ph.param_length);
3856 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3857 if (number_entries) {
3858 for (i = 0; i < number_entries; i++) {
3859 temp = ntohs(req->list_of_streams[i]);
3860 if (temp >= stcb->asoc.streamoutcnt) {
3861 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3864 req->list_of_streams[i] = temp;
3866 for (i = 0; i < number_entries; i++) {
3867 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3868 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3873 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3874 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3875 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3878 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3880 /* Can't do it, since we have sent one out */
3881 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3884 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3885 asoc->str_reset_seq_in++;
3886 } else if (asoc->str_reset_seq_in - 1 == seq) {
3887 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3888 } else if (asoc->str_reset_seq_in - 2 == seq) {
3889 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3891 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3893 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3897 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3898 struct sctp_tmit_chunk *chk,
3899 struct sctp_stream_reset_tsn_request *req)
3901 /* reset all in and out and update the tsn */
3903 * A) reset my str-seq's on in and out. B) Select a receive next,
3904 * and set cum-ack to it. Also process this selected number as a
3905 * fwd-tsn as well. C) set in the response my next sending seq.
3907 struct sctp_forward_tsn_chunk fwdtsn;
3908 struct sctp_association *asoc = &stcb->asoc;
3912 seq = ntohl(req->request_seq);
3913 if (asoc->str_reset_seq_in == seq) {
3914 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3915 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3916 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3918 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3919 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3920 fwdtsn.ch.chunk_flags = 0;
3921 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3922 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3926 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3927 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3928 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3930 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3931 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3932 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3933 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3934 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3935 atomic_add_int(&asoc->sending_seq, 1);
3936 /* save off historical data for retrans */
3937 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3938 asoc->last_sending_seq[0] = asoc->sending_seq;
3939 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3940 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3941 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3942 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3943 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3944 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3946 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3947 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3948 asoc->str_reset_seq_in++;
3949 } else if (asoc->str_reset_seq_in - 1 == seq) {
3950 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3951 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3952 } else if (asoc->str_reset_seq_in - 2 == seq) {
3953 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3954 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3956 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3962 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3963 struct sctp_tmit_chunk *chk,
3964 struct sctp_stream_reset_out_request *req, int trunc)
3967 int number_entries, len;
3968 struct sctp_association *asoc = &stcb->asoc;
3970 seq = ntohl(req->request_seq);
3972 /* now if its not a duplicate we process it */
3973 if (asoc->str_reset_seq_in == seq) {
3974 len = ntohs(req->ph.param_length);
3975 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3977 * the sender is resetting, handle the list issue.. we must
3978 * a) verify if we can do the reset, if so no problem b) If
3979 * we can't do the reset we must copy the request. c) queue
3980 * it, and setup the data in processor to trigger it off
3981 * when needed and dequeue all the queued data.
3983 tsn = ntohl(req->send_reset_at_tsn);
3985 /* move the reset action back one */
3986 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3987 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3988 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3990 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3991 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
3992 /* we can do it now */
3993 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
3994 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3997 * we must queue it up and thus wait for the TSN's
3998 * to arrive that are at or before tsn
4000 struct sctp_stream_reset_list *liste;
4003 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
4004 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
4005 siz, SCTP_M_STRESET);
4006 if (liste == NULL) {
4007 /* gak out of memory */
4008 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4009 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4014 liste->number_entries = number_entries;
4015 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
4016 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
4017 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
4019 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4020 asoc->str_reset_seq_in++;
4021 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4023 * one seq back, just echo back last action since my
4024 * response was lost.
4026 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4027 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4029 * two seq back, just echo back last action since my
4030 * response was lost.
4032 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4034 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4039 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
4040 struct sctp_stream_reset_add_strm *str_add)
4043 * Peer is requesting to add more streams. If its within our
4044 * max-streams we will allow it.
4046 uint32_t num_stream, i;
4048 struct sctp_association *asoc = &stcb->asoc;
4049 struct sctp_queued_to_read *ctl, *nctl;
4051 /* Get the number. */
4052 seq = ntohl(str_add->request_seq);
4053 num_stream = ntohs(str_add->number_of_streams);
4054 /* Now what would be the new total? */
4055 if (asoc->str_reset_seq_in == seq) {
4056 num_stream += stcb->asoc.streamincnt;
4057 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4058 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4059 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4060 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
4061 (num_stream > 0xffff)) {
4062 /* We must reject it they ask for to many */
4064 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4066 /* Ok, we can do that :-) */
4067 struct sctp_stream_in *oldstrm;
4069 /* save off the old */
4070 oldstrm = stcb->asoc.strmin;
4071 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
4072 (num_stream * sizeof(struct sctp_stream_in)),
4074 if (stcb->asoc.strmin == NULL) {
4075 stcb->asoc.strmin = oldstrm;
4078 /* copy off the old data */
4079 for (i = 0; i < stcb->asoc.streamincnt; i++) {
4080 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
4081 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
4082 stcb->asoc.strmin[i].sid = i;
4083 stcb->asoc.strmin[i].last_mid_delivered = oldstrm[i].last_mid_delivered;
4084 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
4085 stcb->asoc.strmin[i].pd_api_started = oldstrm[i].pd_api_started;
4086 /* now anything on those queues? */
4087 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next_instrm, nctl) {
4088 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next_instrm);
4089 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next_instrm);
4091 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].uno_inqueue, next_instrm, nctl) {
4092 TAILQ_REMOVE(&oldstrm[i].uno_inqueue, ctl, next_instrm);
4093 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].uno_inqueue, ctl, next_instrm);
4096 /* Init the new streams */
4097 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
4098 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
4099 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
4100 stcb->asoc.strmin[i].sid = i;
4101 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
4102 stcb->asoc.strmin[i].pd_api_started = 0;
4103 stcb->asoc.strmin[i].delivery_started = 0;
4105 SCTP_FREE(oldstrm, SCTP_M_STRMI);
4106 /* update the size */
4107 stcb->asoc.streamincnt = num_stream;
4108 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4109 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
4111 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4112 asoc->str_reset_seq_in++;
4113 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4115 * one seq back, just echo back last action since my
4116 * response was lost.
4118 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4119 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4121 * two seq back, just echo back last action since my
4122 * response was lost.
4124 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4126 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4132 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
4133 struct sctp_stream_reset_add_strm *str_add)
4136 * Peer is requesting to add more streams. If its within our
4137 * max-streams we will allow it.
4139 uint16_t num_stream;
4141 struct sctp_association *asoc = &stcb->asoc;
4143 /* Get the number. */
4144 seq = ntohl(str_add->request_seq);
4145 num_stream = ntohs(str_add->number_of_streams);
4146 /* Now what would be the new total? */
4147 if (asoc->str_reset_seq_in == seq) {
4148 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
4149 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
4150 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4151 } else if (stcb->asoc.stream_reset_outstanding) {
4152 /* We must reject it we have something pending */
4153 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
4155 /* Ok, we can do that :-) */
4158 mychk = stcb->asoc.streamoutcnt;
4159 mychk += num_stream;
4160 if (mychk < 0x10000) {
4161 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
4162 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
4163 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4166 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
4169 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
4170 asoc->str_reset_seq_in++;
4171 } else if ((asoc->str_reset_seq_in - 1) == seq) {
4173 * one seq back, just echo back last action since my
4174 * response was lost.
4176 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
4177 } else if ((asoc->str_reset_seq_in - 2) == seq) {
4179 * two seq back, just echo back last action since my
4180 * response was lost.
4182 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
4184 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
4189 __attribute__((noinline))
4192 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
4193 struct sctp_chunkhdr *ch_req)
4195 uint16_t remaining_length, param_len, ptype;
4196 struct sctp_paramhdr pstore;
4197 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
4201 struct sctp_tmit_chunk *chk;
4202 struct sctp_chunkhdr *ch;
4203 struct sctp_paramhdr *ph;
4207 /* now it may be a reset or a reset-response */
4208 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
4210 /* setup for adding the response */
4211 sctp_alloc_a_chunk(stcb, chk);
4215 chk->copy_by_ref = 0;
4216 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
4217 chk->rec.chunk_id.can_take_data = 0;
4219 chk->asoc = &stcb->asoc;
4220 chk->no_fr_allowed = 0;
4221 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
4222 chk->book_size_scale = 0;
4223 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
4224 if (chk->data == NULL) {
4227 sctp_m_freem(chk->data);
4230 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
4233 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
4235 /* setup chunk parameters */
4236 chk->sent = SCTP_DATAGRAM_UNSENT;
4240 ch = mtod(chk->data, struct sctp_chunkhdr *);
4241 ch->chunk_type = SCTP_STREAM_RESET;
4242 ch->chunk_flags = 0;
4243 ch->chunk_length = htons(chk->send_size);
4244 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4245 offset += sizeof(struct sctp_chunkhdr);
4246 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
4247 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *)&pstore);
4252 param_len = ntohs(ph->param_length);
4253 if ((param_len > remaining_length) ||
4254 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
4255 /* bad parameter length */
4258 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
4259 (uint8_t *)&cstore);
4264 ptype = ntohs(ph->param_type);
4266 if (param_len > sizeof(cstore)) {
4271 if (num_param > SCTP_MAX_RESET_PARAMS) {
4272 /* hit the max of parameters already sorry.. */
4275 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4276 struct sctp_stream_reset_out_request *req_out;
4278 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4281 req_out = (struct sctp_stream_reset_out_request *)ph;
4283 if (stcb->asoc.stream_reset_outstanding) {
4284 seq = ntohl(req_out->response_seq);
4285 if (seq == stcb->asoc.str_reset_seq_out) {
4287 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4290 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4291 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4292 struct sctp_stream_reset_add_strm *str_add;
4294 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4297 str_add = (struct sctp_stream_reset_add_strm *)ph;
4299 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4300 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4301 struct sctp_stream_reset_add_strm *str_add;
4303 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4306 str_add = (struct sctp_stream_reset_add_strm *)ph;
4308 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4309 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4310 struct sctp_stream_reset_in_request *req_in;
4313 req_in = (struct sctp_stream_reset_in_request *)ph;
4314 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4315 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4316 struct sctp_stream_reset_tsn_request *req_tsn;
4319 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4320 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4322 goto strres_nochunk;
4326 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4327 struct sctp_stream_reset_response *resp;
4330 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4333 resp = (struct sctp_stream_reset_response *)ph;
4334 seq = ntohl(resp->response_seq);
4335 result = ntohl(resp->result);
4336 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4338 goto strres_nochunk;
4343 offset += SCTP_SIZE32(param_len);
4344 if (remaining_length >= SCTP_SIZE32(param_len)) {
4345 remaining_length -= SCTP_SIZE32(param_len);
4347 remaining_length = 0;
4351 /* we have no response free the stuff */
4352 goto strres_nochunk;
4354 /* ok we have a chunk to link in */
4355 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4358 stcb->asoc.ctrl_queue_cnt++;
4363 * Handle a router or endpoints report of a packet loss, there are two ways
4364 * to handle this, either we get the whole packet and must disect it
4365 * ourselves (possibly with truncation and or corruption) or it is a summary
4366 * from a middle box that did the disectting for us.
4369 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4370 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4372 uint32_t bottle_bw, on_queue;
4376 struct sctp_chunk_desc desc;
4377 struct sctp_chunkhdr *ch;
4379 chlen = ntohs(cp->ch.chunk_length);
4380 chlen -= sizeof(struct sctp_pktdrop_chunk);
4381 /* XXX possible chlen underflow */
4384 if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)
4385 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4387 ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr));
4388 chlen -= sizeof(struct sctphdr);
4389 /* XXX possible chlen underflow */
4390 memset(&desc, 0, sizeof(desc));
4392 trunc_len = (uint16_t)ntohs(cp->trunc_len);
4393 if (trunc_len > limit) {
4396 /* now the chunks themselves */
4397 while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) {
4398 desc.chunk_type = ch->chunk_type;
4399 /* get amount we need to move */
4400 at = ntohs(ch->chunk_length);
4401 if (at < sizeof(struct sctp_chunkhdr)) {
4402 /* corrupt chunk, maybe at the end? */
4403 SCTP_STAT_INCR(sctps_pdrpcrupt);
4406 if (trunc_len == 0) {
4407 /* we are supposed to have all of it */
4409 /* corrupt skip it */
4410 SCTP_STAT_INCR(sctps_pdrpcrupt);
4414 /* is there enough of it left ? */
4415 if (desc.chunk_type == SCTP_DATA) {
4416 if (chlen < (sizeof(struct sctp_data_chunk) +
4417 sizeof(desc.data_bytes))) {
4421 if (chlen < sizeof(struct sctp_chunkhdr)) {
4426 if (desc.chunk_type == SCTP_DATA) {
4427 /* can we get out the tsn? */
4428 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4429 SCTP_STAT_INCR(sctps_pdrpmbda);
4431 if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) {
4433 struct sctp_data_chunk *dcp;
4437 dcp = (struct sctp_data_chunk *)ch;
4438 ddp = (uint8_t *)(dcp + 1);
4439 for (iii = 0; iii < sizeof(desc.data_bytes); iii++) {
4440 desc.data_bytes[iii] = ddp[iii];
4442 desc.tsn_ifany = dcp->dp.tsn;
4444 /* nope we are done. */
4445 SCTP_STAT_INCR(sctps_pdrpnedat);
4449 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
4450 SCTP_STAT_INCR(sctps_pdrpmbct);
4453 if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) {
4454 SCTP_STAT_INCR(sctps_pdrppdbrk);
4457 if (SCTP_SIZE32(at) > chlen) {
4460 chlen -= SCTP_SIZE32(at);
4461 if (chlen < sizeof(struct sctp_chunkhdr)) {
4462 /* done, none left */
4465 ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at));
4467 /* Now update any rwnd --- possibly */
4468 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4469 /* From a peer, we get a rwnd report */
4472 SCTP_STAT_INCR(sctps_pdrpfehos);
4474 bottle_bw = ntohl(cp->bottle_bw);
4475 on_queue = ntohl(cp->current_onq);
4476 if (bottle_bw && on_queue) {
4477 /* a rwnd report is in here */
4478 if (bottle_bw > on_queue)
4479 a_rwnd = bottle_bw - on_queue;
4484 stcb->asoc.peers_rwnd = 0;
4486 if (a_rwnd > stcb->asoc.total_flight) {
4487 stcb->asoc.peers_rwnd =
4488 a_rwnd - stcb->asoc.total_flight;
4490 stcb->asoc.peers_rwnd = 0;
4492 if (stcb->asoc.peers_rwnd <
4493 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4494 /* SWS sender side engages */
4495 stcb->asoc.peers_rwnd = 0;
4500 SCTP_STAT_INCR(sctps_pdrpfmbox);
4503 /* now middle boxes in sat networks get a cwnd bump */
4504 if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) &&
4505 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4506 (stcb->asoc.sat_network)) {
4508 * This is debatable but for sat networks it makes sense
4509 * Note if a T3 timer has went off, we will prohibit any
4510 * changes to cwnd until we exit the t3 loss recovery.
4512 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4513 net, cp, &bottle_bw, &on_queue);
4518 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4519 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4520 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4521 * length of the complete packet outputs: - length: modified to remaining
4522 * length after control processing - netp: modified to new sctp_nets after
4523 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4524 * bad packet,...) otherwise return the tcb for this packet
4527 __attribute__((noinline))
4529 static struct sctp_tcb *
4530 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4531 struct sockaddr *src, struct sockaddr *dst,
4532 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4533 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4534 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4535 uint32_t vrf_id, uint16_t port)
4537 struct sctp_association *asoc;
4538 struct mbuf *op_err;
4539 char msg[SCTP_DIAG_INFO_LEN];
4541 int num_chunks = 0; /* number of control chunks processed */
4542 uint32_t chk_length, contiguous;
4544 int abort_no_unlock = 0;
4548 * How big should this be, and should it be alloc'd? Lets try the
4549 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4550 * until we get into jumbo grams and such..
4552 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4554 uint32_t auth_offset = 0, auth_len = 0;
4555 int auth_skipped = 0;
4557 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4561 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4562 iphlen, *offset, length, (void *)stcb);
4565 SCTP_TCB_LOCK_ASSERT(stcb);
4567 /* validate chunk header length... */
4568 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4569 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4570 ntohs(ch->chunk_length));
4575 * validate the verification tag
4577 vtag_in = ntohl(sh->v_tag);
4579 if (ch->chunk_type == SCTP_INITIATION) {
4580 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4581 ntohs(ch->chunk_length), vtag_in);
4583 /* protocol error- silently discard... */
4584 SCTP_STAT_INCR(sctps_badvtag);
4586 SCTP_TCB_UNLOCK(stcb);
4590 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4592 * If there is no stcb, skip the AUTH chunk and process
4593 * later after a stcb is found (to validate the lookup was
4596 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4598 (inp->auth_supported == 1)) {
4599 /* save this chunk for later processing */
4601 auth_offset = *offset;
4602 auth_len = ntohs(ch->chunk_length);
4604 /* (temporarily) move past this chunk */
4605 *offset += SCTP_SIZE32(auth_len);
4606 if (*offset >= length) {
4607 /* no more data left in the mbuf chain */
4611 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4612 sizeof(struct sctp_chunkhdr), chunk_buf);
4619 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4620 goto process_control_chunks;
4623 * first check if it's an ASCONF with an unknown src addr we
4624 * need to look inside to find the association
4626 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4627 struct sctp_chunkhdr *asconf_ch = ch;
4628 uint32_t asconf_offset = 0, asconf_len = 0;
4630 /* inp's refcount may be reduced */
4631 SCTP_INP_INCR_REF(inp);
4633 asconf_offset = *offset;
4635 asconf_len = ntohs(asconf_ch->chunk_length);
4636 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4638 stcb = sctp_findassociation_ep_asconf(m,
4641 sh, &inp, netp, vrf_id);
4644 asconf_offset += SCTP_SIZE32(asconf_len);
4645 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4646 sizeof(struct sctp_chunkhdr), chunk_buf);
4647 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4650 * reduce inp's refcount if not reduced in
4651 * sctp_findassociation_ep_asconf().
4653 SCTP_INP_DECR_REF(inp);
4655 /* now go back and verify any auth chunk to be sure */
4656 if (auth_skipped && (stcb != NULL)) {
4657 struct sctp_auth_chunk *auth;
4659 auth = (struct sctp_auth_chunk *)
4660 sctp_m_getptr(m, auth_offset,
4661 auth_len, chunk_buf);
4664 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4666 /* auth HMAC failed so dump it */
4670 /* remaining chunks are HMAC checked */
4671 stcb->asoc.authenticated = 1;
4676 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4677 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4679 /* no association, so it's out of the blue... */
4680 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4681 mflowtype, mflowid, inp->fibnum,
4687 /* ABORT and SHUTDOWN can use either v_tag... */
4688 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4689 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4690 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4691 /* Take the T-bit always into account. */
4692 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4693 (vtag_in == asoc->my_vtag)) ||
4694 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4695 (asoc->peer_vtag != htonl(0)) &&
4696 (vtag_in == asoc->peer_vtag))) {
4699 /* drop this packet... */
4700 SCTP_STAT_INCR(sctps_badvtag);
4702 SCTP_TCB_UNLOCK(stcb);
4706 } else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
4707 if (vtag_in != asoc->my_vtag) {
4709 * this could be a stale SHUTDOWN-ACK or the
4710 * peer never got the SHUTDOWN-COMPLETE and
4711 * is still hung; we have started a new asoc
4712 * but it won't complete until the shutdown
4716 SCTP_TCB_UNLOCK(stcb);
4718 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4719 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4721 sctp_handle_ootb(m, iphlen, *offset, src, dst,
4723 mflowtype, mflowid, fibnum,
4728 /* for all other chunks, vtag must match */
4729 if (vtag_in != asoc->my_vtag) {
4730 /* invalid vtag... */
4731 SCTPDBG(SCTP_DEBUG_INPUT3,
4732 "invalid vtag: %xh, expect %xh\n",
4733 vtag_in, asoc->my_vtag);
4734 SCTP_STAT_INCR(sctps_badvtag);
4736 SCTP_TCB_UNLOCK(stcb);
4742 } /* end if !SCTP_COOKIE_ECHO */
4744 * process all control chunks...
4746 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4747 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4748 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4749 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
4750 /* implied cookie-ack.. we must have lost the ack */
4751 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4754 process_control_chunks:
4755 while (IS_SCTP_CONTROL(ch)) {
4756 /* validate chunk length */
4757 chk_length = ntohs(ch->chunk_length);
4758 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4759 ch->chunk_type, chk_length);
4760 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4761 if (chk_length < sizeof(*ch) ||
4762 (*offset + (int)chk_length) > length) {
4766 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4768 * INIT and INIT-ACK only gets the init ack "header" portion
4769 * only because we don't have to process the peer's COOKIE.
4770 * All others get a complete chunk.
4772 switch (ch->chunk_type) {
4773 case SCTP_INITIATION:
4774 contiguous = sizeof(struct sctp_init_chunk);
4776 case SCTP_INITIATION_ACK:
4777 contiguous = sizeof(struct sctp_init_ack_chunk);
4780 contiguous = min(chk_length, sizeof(chunk_buf));
4783 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4789 SCTP_TCB_UNLOCK(stcb);
4794 /* Save off the last place we got a control from */
4796 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4798 * allow last_control to be NULL if
4799 * ASCONF... ASCONF processing will find the
4802 if ((netp != NULL) && (*netp != NULL))
4803 stcb->asoc.last_control_chunk_from = *netp;
4806 #ifdef SCTP_AUDITING_ENABLED
4807 sctp_audit_log(0xB0, ch->chunk_type);
4810 /* check to see if this chunk required auth, but isn't */
4811 if ((stcb != NULL) &&
4812 (stcb->asoc.auth_supported == 1) &&
4813 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4814 !stcb->asoc.authenticated) {
4815 /* "silently" ignore */
4816 SCTP_STAT_INCR(sctps_recvauthmissing);
4819 switch (ch->chunk_type) {
4820 case SCTP_INITIATION:
4821 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4822 /* The INIT chunk must be the only chunk. */
4823 if ((num_chunks > 1) ||
4824 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4825 /* RFC 4960 requires that no ABORT is sent */
4828 SCTP_TCB_UNLOCK(stcb);
4832 /* Honor our resource limit. */
4833 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4834 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4835 sctp_abort_association(inp, stcb, m, iphlen,
4836 src, dst, sh, op_err,
4842 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4843 (struct sctp_init_chunk *)ch, inp,
4844 stcb, *netp, &abort_no_unlock,
4848 if ((!abort_no_unlock) && (stcb != NULL)) {
4849 SCTP_TCB_UNLOCK(stcb);
4853 case SCTP_PAD_CHUNK:
4855 case SCTP_INITIATION_ACK:
4856 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT_ACK\n");
4857 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4858 /* We are not interested anymore */
4859 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size)) {
4864 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4865 so = SCTP_INP_SO(inp);
4866 atomic_add_int(&stcb->asoc.refcnt, 1);
4867 SCTP_TCB_UNLOCK(stcb);
4868 SCTP_SOCKET_LOCK(so, 1);
4869 SCTP_TCB_LOCK(stcb);
4870 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4872 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4873 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4874 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4875 SCTP_SOCKET_UNLOCK(so, 1);
4881 /* The INIT-ACK chunk must be the only chunk. */
4882 if ((num_chunks > 1) ||
4883 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4887 if ((netp != NULL) && (*netp != NULL)) {
4888 ret = sctp_handle_init_ack(m, iphlen, *offset,
4890 (struct sctp_init_ack_chunk *)ch,
4899 if (abort_no_unlock) {
4903 * Special case, I must call the output routine to
4904 * get the cookie echoed
4906 if ((stcb != NULL) && (ret == 0)) {
4907 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4911 case SCTP_SELECTIVE_ACK:
4912 case SCTP_NR_SELECTIVE_ACK:
4915 uint32_t a_rwnd, cum_ack;
4916 uint16_t num_seg, num_nr_seg, num_dup;
4918 int offset_seg, offset_dup;
4920 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
4921 ch->chunk_type == SCTP_SELECTIVE_ACK ? "SCTP_SACK" : "SCTP_NR_SACK");
4922 SCTP_STAT_INCR(sctps_recvsacks);
4924 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing %s chunk\n",
4925 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK");
4928 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4929 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4930 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4934 if (stcb->asoc.nrsack_supported == 0) {
4937 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4938 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR_SACK chunk, too small\n");
4942 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4944 * If we have sent a shutdown-ack, we will pay no
4945 * attention to a sack sent in to us since
4946 * we don't care anymore.
4950 flags = ch->chunk_flags;
4951 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4952 struct sctp_sack_chunk *sack;
4954 sack = (struct sctp_sack_chunk *)ch;
4955 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4956 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4958 num_dup = ntohs(sack->sack.num_dup_tsns);
4959 a_rwnd = ntohl(sack->sack.a_rwnd);
4960 if (sizeof(struct sctp_sack_chunk) +
4961 num_seg * sizeof(struct sctp_gap_ack_block) +
4962 num_dup * sizeof(uint32_t) != chk_length) {
4963 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4966 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4967 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4969 struct sctp_nr_sack_chunk *nr_sack;
4971 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4972 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4973 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4974 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4975 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4976 a_rwnd = ntohl(nr_sack->nr_sack.a_rwnd);
4977 if (sizeof(struct sctp_nr_sack_chunk) +
4978 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4979 num_dup * sizeof(uint32_t) != chk_length) {
4980 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
4983 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
4984 offset_dup = offset_seg + (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block);
4986 SCTPDBG(SCTP_DEBUG_INPUT3, "%s process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4987 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK",
4988 cum_ack, num_seg, a_rwnd);
4989 stcb->asoc.seen_a_sack_this_pkt = 1;
4990 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4991 (num_seg == 0) && (num_nr_seg == 0) &&
4992 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4993 (stcb->asoc.saw_sack_with_frags == 0) &&
4994 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4995 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
4997 * We have a SIMPLE sack having no
4998 * prior segments and data on sent
4999 * queue to be acked. Use the faster
5000 * path sack processing. We also
5001 * allow window update sacks with no
5002 * missing segments to go this way
5005 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
5006 &abort_now, ecne_seen);
5008 if ((netp != NULL) && (*netp != NULL)) {
5009 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
5010 num_seg, num_nr_seg, num_dup, &abort_now, flags,
5011 cum_ack, a_rwnd, ecne_seen);
5015 /* ABORT signal from sack processing */
5019 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
5020 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
5021 (stcb->asoc.stream_queue_cnt == 0)) {
5022 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
5026 case SCTP_HEARTBEAT_REQUEST:
5027 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
5028 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5029 SCTP_STAT_INCR(sctps_recvheartbeat);
5030 sctp_send_heartbeat_ack(stcb, m, *offset,
5034 case SCTP_HEARTBEAT_ACK:
5035 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT_ACK\n");
5036 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
5041 SCTP_STAT_INCR(sctps_recvheartbeatack);
5042 if ((netp != NULL) && (*netp != NULL)) {
5043 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
5047 case SCTP_ABORT_ASSOCIATION:
5048 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
5051 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5052 if (sctp_handle_abort((struct sctp_abort_chunk *)ch, stcb, *netp)) {
5062 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
5064 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
5068 if ((netp != NULL) && (*netp != NULL)) {
5071 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
5072 stcb, *netp, &abort_flag);
5079 case SCTP_SHUTDOWN_ACK:
5080 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_ACK, stcb %p\n", (void *)stcb);
5081 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5082 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
5087 case SCTP_OPERATION_ERROR:
5088 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP_ERR\n");
5089 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL) &&
5090 sctp_handle_error(ch, stcb, *netp, contiguous) < 0) {
5095 case SCTP_COOKIE_ECHO:
5096 SCTPDBG(SCTP_DEBUG_INPUT3,
5097 "SCTP_COOKIE_ECHO, stcb %p\n", (void *)stcb);
5098 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size > 0)) {
5101 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5102 /* We are not interested anymore */
5105 SCTP_TCB_UNLOCK(stcb);
5112 * First are we accepting? We do this again here
5113 * since it is possible that a previous endpoint WAS
5114 * listening responded to a INIT-ACK and then
5115 * closed. We opened and bound.. and are now no
5118 * XXXGL: notes on checking listen queue length.
5119 * 1) SCTP_IS_LISTENING() doesn't necessarily mean
5120 * SOLISTENING(), because a listening "UDP type"
5121 * socket isn't listening in terms of the socket
5122 * layer. It is a normal data flow socket, that
5123 * can fork off new connections. Thus, we should
5124 * look into sol_qlen only in case we are !UDP.
5125 * 2) Checking sol_qlen in general requires locking
5126 * the socket, and this code lacks that.
5128 if ((stcb == NULL) &&
5129 (!SCTP_IS_LISTENING(inp) ||
5130 (!(inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) &&
5131 inp->sctp_socket->sol_qlen >= inp->sctp_socket->sol_qlimit))) {
5132 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
5133 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
5134 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
5135 sctp_abort_association(inp, stcb, m, iphlen,
5136 src, dst, sh, op_err,
5143 struct mbuf *ret_buf;
5144 struct sctp_inpcb *linp;
5153 SCTP_ASOC_CREATE_LOCK(linp);
5154 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
5155 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
5156 SCTP_ASOC_CREATE_UNLOCK(linp);
5161 struct sctp_tcb *locked_stcb;
5165 sctp_handle_cookie_echo(m, iphlen,
5169 (struct sctp_cookie_echo_chunk *)ch,
5179 if ((locked_stcb != NULL) && (locked_stcb != stcb)) {
5180 SCTP_TCB_UNLOCK(locked_stcb);
5183 SCTP_TCB_LOCK_ASSERT(stcb);
5189 SCTP_ASOC_CREATE_UNLOCK(linp);
5191 if (ret_buf == NULL) {
5193 SCTP_TCB_UNLOCK(stcb);
5195 SCTPDBG(SCTP_DEBUG_INPUT3,
5196 "GAK, null buffer\n");
5200 /* if AUTH skipped, see if it verified... */
5205 if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
5207 * Restart the timer if we have
5210 struct sctp_tmit_chunk *chk;
5212 chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
5213 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
5217 case SCTP_COOKIE_ACK:
5218 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE_ACK, stcb %p\n", (void *)stcb);
5219 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
5222 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5223 /* We are not interested anymore */
5224 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
5227 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5228 so = SCTP_INP_SO(inp);
5229 atomic_add_int(&stcb->asoc.refcnt, 1);
5230 SCTP_TCB_UNLOCK(stcb);
5231 SCTP_SOCKET_LOCK(so, 1);
5232 SCTP_TCB_LOCK(stcb);
5233 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5235 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5236 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
5237 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5238 SCTP_SOCKET_UNLOCK(so, 1);
5244 if ((netp != NULL) && (*netp != NULL)) {
5245 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
5249 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_ECHO\n");
5250 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_ecne_chunk))) {
5255 if (stcb->asoc.ecn_supported == 0) {
5258 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, stcb);
5262 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_CWR\n");
5263 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_cwr_chunk))) {
5267 if (stcb->asoc.ecn_supported == 0) {
5270 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5272 case SCTP_SHUTDOWN_COMPLETE:
5273 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_COMPLETE, stcb %p\n", (void *)stcb);
5274 /* must be first and only chunk */
5275 if ((num_chunks > 1) ||
5276 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5280 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5281 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5288 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5290 if (stcb->asoc.asconf_supported == 0) {
5293 sctp_handle_asconf(m, *offset, src,
5294 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5298 case SCTP_ASCONF_ACK:
5299 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF_ACK\n");
5300 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5305 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5306 if (stcb->asoc.asconf_supported == 0) {
5309 /* He's alive so give him credit */
5310 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5311 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5312 stcb->asoc.overall_error_count,
5314 SCTP_FROM_SCTP_INPUT,
5317 stcb->asoc.overall_error_count = 0;
5318 sctp_handle_asconf_ack(m, *offset,
5319 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5320 if (abort_no_unlock)
5324 case SCTP_FORWARD_CUM_TSN:
5325 case SCTP_IFORWARD_CUM_TSN:
5326 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_FWD_TSN\n");
5327 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5335 if (stcb->asoc.prsctp_supported == 0) {
5339 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5340 /* We are not interested anymore */
5341 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5342 so = SCTP_INP_SO(inp);
5343 atomic_add_int(&stcb->asoc.refcnt, 1);
5344 SCTP_TCB_UNLOCK(stcb);
5345 SCTP_SOCKET_LOCK(so, 1);
5346 SCTP_TCB_LOCK(stcb);
5347 atomic_subtract_int(&stcb->asoc.refcnt, 1);
5349 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5350 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5351 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
5352 SCTP_SOCKET_UNLOCK(so, 1);
5358 * For sending a SACK this looks like DATA
5361 stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
5362 sctp_handle_forward_tsn(stcb,
5363 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5370 case SCTP_STREAM_RESET:
5371 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5372 if (((stcb == NULL) || (ch == NULL) || (chk_length < sizeof(struct sctp_stream_reset_tsn_req)))) {
5377 if (stcb->asoc.reconfig_supported == 0) {
5380 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5381 /* stop processing */
5386 case SCTP_PACKET_DROPPED:
5387 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5388 /* re-get it all please */
5389 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5394 if ((ch != NULL) && (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5395 if (stcb->asoc.pktdrop_supported == 0) {
5398 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5400 min(chk_length, contiguous));
5403 case SCTP_AUTHENTICATION:
5404 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5406 /* save the first AUTH for later processing */
5407 if (auth_skipped == 0) {
5408 auth_offset = *offset;
5409 auth_len = chk_length;
5412 /* skip this chunk (temporarily) */
5415 if (stcb->asoc.auth_supported == 0) {
5418 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5419 (chk_length > (sizeof(struct sctp_auth_chunk) +
5420 SCTP_AUTH_DIGEST_LEN_MAX))) {
5425 if (got_auth == 1) {
5426 /* skip this chunk... it's already auth'd */
5430 if ((ch == NULL) || sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch,
5432 /* auth HMAC failed so dump the packet */
5436 /* remaining chunks are HMAC checked */
5437 stcb->asoc.authenticated = 1;
5443 /* it's an unknown chunk! */
5444 if ((ch->chunk_type & 0x40) && (stcb != NULL)) {
5445 struct sctp_gen_error_cause *cause;
5448 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
5449 0, M_NOWAIT, 1, MT_DATA);
5450 if (op_err != NULL) {
5451 len = min(SCTP_SIZE32(chk_length), (uint32_t)(length - *offset));
5452 cause = mtod(op_err, struct sctp_gen_error_cause *);
5453 cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5454 cause->length = htons((uint16_t)(len + sizeof(struct sctp_gen_error_cause)));
5455 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5456 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5457 if (SCTP_BUF_NEXT(op_err) != NULL) {
5458 #ifdef SCTP_MBUF_LOGGING
5459 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5460 sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
5463 sctp_queue_op_err(stcb, op_err);
5465 sctp_m_freem(op_err);
5469 if ((ch->chunk_type & 0x80) == 0) {
5470 /* discard this packet */
5473 } /* else skip this bad chunk and continue... */
5475 } /* switch (ch->chunk_type) */
5479 /* get the next chunk */
5480 *offset += SCTP_SIZE32(chk_length);
5481 if (*offset >= length) {
5482 /* no more data left in the mbuf chain */
5485 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5486 sizeof(struct sctp_chunkhdr), chunk_buf);
5493 if ((asconf_cnt > 0) && (stcb != NULL)) {
5494 sctp_send_asconf_ack(stcb);
5501 * common input chunk processing (v4 and v6)
5504 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5505 struct sockaddr *src, struct sockaddr *dst,
5506 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5507 uint8_t compute_crc,
5509 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5510 uint32_t vrf_id, uint16_t port)
5513 int fwd_tsn_seen = 0, data_processed = 0;
5514 struct mbuf *m = *mm, *op_err;
5515 char msg[SCTP_DIAG_INFO_LEN];
5517 int cnt_ctrl_ready = 0;
5518 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5519 struct sctp_tcb *stcb = NULL;
5520 struct sctp_nets *net = NULL;
5522 SCTP_STAT_INCR(sctps_recvdatagrams);
5523 #ifdef SCTP_AUDITING_ENABLED
5524 sctp_audit_log(0xE0, 1);
5525 sctp_auditing(0, inp, stcb, net);
5527 if (compute_crc != 0) {
5528 uint32_t check, calc_check;
5530 check = sh->checksum;
5532 calc_check = sctp_calculate_cksum(m, iphlen);
5533 sh->checksum = check;
5534 if (calc_check != check) {
5535 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5536 calc_check, check, (void *)m, length, iphlen);
5537 stcb = sctp_findassociation_addr(m, offset, src, dst,
5538 sh, ch, &inp, &net, vrf_id);
5539 #if defined(INET) || defined(INET6)
5540 if ((ch->chunk_type != SCTP_INITIATION) &&
5541 (net != NULL) && (net->port != port)) {
5542 if (net->port == 0) {
5543 /* UDP encapsulation turned on. */
5544 net->mtu -= sizeof(struct udphdr);
5545 if (stcb->asoc.smallest_mtu > net->mtu) {
5546 sctp_pathmtu_adjustment(stcb, net->mtu);
5548 } else if (port == 0) {
5549 /* UDP encapsulation turned off. */
5550 net->mtu += sizeof(struct udphdr);
5551 /* XXX Update smallest_mtu */
5557 net->flowtype = mflowtype;
5558 net->flowid = mflowid;
5560 if ((inp != NULL) && (stcb != NULL)) {
5561 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5562 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5563 } else if ((inp != NULL) && (stcb == NULL)) {
5566 SCTP_STAT_INCR(sctps_badsum);
5567 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5571 /* Destination port of 0 is illegal, based on RFC4960. */
5572 if (sh->dest_port == 0) {
5573 SCTP_STAT_INCR(sctps_hdrops);
5576 stcb = sctp_findassociation_addr(m, offset, src, dst,
5577 sh, ch, &inp, &net, vrf_id);
5578 #if defined(INET) || defined(INET6)
5579 if ((ch->chunk_type != SCTP_INITIATION) &&
5580 (net != NULL) && (net->port != port)) {
5581 if (net->port == 0) {
5582 /* UDP encapsulation turned on. */
5583 net->mtu -= sizeof(struct udphdr);
5584 if (stcb->asoc.smallest_mtu > net->mtu) {
5585 sctp_pathmtu_adjustment(stcb, net->mtu);
5587 } else if (port == 0) {
5588 /* UDP encapsulation turned off. */
5589 net->mtu += sizeof(struct udphdr);
5590 /* XXX Update smallest_mtu */
5596 net->flowtype = mflowtype;
5597 net->flowid = mflowid;
5600 SCTP_STAT_INCR(sctps_noport);
5601 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5604 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5605 sctp_send_shutdown_complete2(src, dst, sh,
5606 mflowtype, mflowid, fibnum,
5610 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5613 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5614 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5615 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5616 (ch->chunk_type != SCTP_INIT))) {
5617 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5619 sctp_send_abort(m, iphlen, src, dst,
5621 mflowtype, mflowid, fibnum,
5626 } else if (stcb == NULL) {
5629 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5630 (void *)m, iphlen, offset, length, (void *)stcb);
5632 /* always clear this before beginning a packet */
5633 stcb->asoc.authenticated = 0;
5634 stcb->asoc.seen_a_sack_this_pkt = 0;
5635 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5636 (void *)stcb, stcb->asoc.state);
5638 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5639 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5641 * If we hit here, we had a ref count
5642 * up when the assoc was aborted and the
5643 * timer is clearing out the assoc, we should
5644 * NOT respond to any packet.. its OOTB.
5646 SCTP_TCB_UNLOCK(stcb);
5648 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5649 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5651 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5652 mflowtype, mflowid, inp->fibnum,
5657 if (IS_SCTP_CONTROL(ch)) {
5658 /* process the control portion of the SCTP packet */
5659 /* sa_ignore NO_NULL_CHK */
5660 stcb = sctp_process_control(m, iphlen, &offset, length,
5662 inp, stcb, &net, &fwd_tsn_seen,
5663 mflowtype, mflowid, fibnum,
5667 * This covers us if the cookie-echo was there and
5668 * it changes our INP.
5670 inp = stcb->sctp_ep;
5671 #if defined(INET) || defined(INET6)
5672 if ((ch->chunk_type != SCTP_INITIATION) &&
5673 (net != NULL) && (net->port != port)) {
5674 if (net->port == 0) {
5675 /* UDP encapsulation turned on. */
5676 net->mtu -= sizeof(struct udphdr);
5677 if (stcb->asoc.smallest_mtu > net->mtu) {
5678 sctp_pathmtu_adjustment(stcb, net->mtu);
5680 } else if (port == 0) {
5681 /* UDP encapsulation turned off. */
5682 net->mtu += sizeof(struct udphdr);
5683 /* XXX Update smallest_mtu */
5691 * no control chunks, so pre-process DATA chunks (these
5692 * checks are taken care of by control processing)
5696 * if DATA only packet, and auth is required, then punt...
5697 * can't have authenticated without any AUTH (control)
5700 if ((stcb != NULL) &&
5701 (stcb->asoc.auth_supported == 1) &&
5702 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5703 /* "silently" ignore */
5704 SCTP_STAT_INCR(sctps_recvauthmissing);
5708 /* out of the blue DATA chunk */
5709 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5710 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5712 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5713 mflowtype, mflowid, fibnum,
5717 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5718 /* v_tag mismatch! */
5719 SCTP_STAT_INCR(sctps_badvtag);
5726 * no valid TCB for this packet, or we found it's a bad
5727 * packet while processing control, or we're done with this
5728 * packet (done or skip rest of data), so we drop it...
5733 * DATA chunk processing
5735 /* plow through the data chunks while length > offset */
5738 * Rest should be DATA only. Check authentication state if AUTH for
5741 if ((length > offset) &&
5743 (stcb->asoc.auth_supported == 1) &&
5744 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5745 !stcb->asoc.authenticated) {
5746 /* "silently" ignore */
5747 SCTP_STAT_INCR(sctps_recvauthmissing);
5748 SCTPDBG(SCTP_DEBUG_AUTH1,
5749 "Data chunk requires AUTH, skipped\n");
5752 if (length > offset) {
5756 * First check to make sure our state is correct. We would
5757 * not get here unless we really did have a tag, so we don't
5758 * abort if this happens, just dump the chunk silently.
5760 switch (SCTP_GET_STATE(&stcb->asoc)) {
5761 case SCTP_STATE_COOKIE_ECHOED:
5763 * we consider data with valid tags in this state
5764 * shows us the cookie-ack was lost. Imply it was
5767 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5769 case SCTP_STATE_COOKIE_WAIT:
5771 * We consider OOTB any data sent during asoc setup.
5773 snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5774 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5776 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5777 mflowtype, mflowid, inp->fibnum,
5780 /* sa_ignore NOTREACHED */
5782 case SCTP_STATE_EMPTY: /* should not happen */
5783 case SCTP_STATE_INUSE: /* should not happen */
5784 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5785 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5788 /* sa_ignore NOTREACHED */
5790 case SCTP_STATE_OPEN:
5791 case SCTP_STATE_SHUTDOWN_SENT:
5794 /* plow through the data chunks while length > offset */
5795 retval = sctp_process_data(mm, iphlen, &offset, length,
5796 inp, stcb, net, &high_tsn);
5799 * The association aborted, NO UNLOCK needed since
5800 * the association is destroyed.
5807 * Anything important needs to have been m_copy'ed in
5811 /* take care of ecn */
5812 if ((data_processed == 1) &&
5813 (stcb->asoc.ecn_supported == 1) &&
5814 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5815 /* Yep, we need to add a ECNE */
5816 sctp_send_ecn_echo(stcb, net, high_tsn);
5818 if ((data_processed == 0) && (fwd_tsn_seen)) {
5820 uint32_t highest_tsn;
5822 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5823 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5825 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5827 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5828 stcb->asoc.send_sack = 1;
5829 sctp_sack_check(stcb, was_a_gap);
5830 } else if (fwd_tsn_seen) {
5831 stcb->asoc.send_sack = 1;
5833 /* trigger send of any chunks in queue... */
5835 #ifdef SCTP_AUDITING_ENABLED
5836 sctp_audit_log(0xE0, 2);
5837 sctp_auditing(1, inp, stcb, net);
5839 SCTPDBG(SCTP_DEBUG_INPUT1,
5840 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5841 stcb->asoc.peers_rwnd,
5842 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5843 stcb->asoc.total_flight);
5844 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5845 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5846 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5848 if (!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue) ||
5850 stcb->asoc.trigger_reset ||
5852 (stcb->asoc.peers_rwnd > 0 ||
5853 (stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) {
5854 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5855 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5856 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5858 #ifdef SCTP_AUDITING_ENABLED
5859 sctp_audit_log(0xE0, 3);
5860 sctp_auditing(2, inp, stcb, net);
5864 SCTP_TCB_UNLOCK(stcb);
5866 if (inp_decr != NULL) {
5867 /* reduce ref-count */
5868 SCTP_INP_WLOCK(inp_decr);
5869 SCTP_INP_DECR_REF(inp_decr);
5870 SCTP_INP_WUNLOCK(inp_decr);
5877 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5881 uint32_t vrf_id = 0;
5883 struct sockaddr_in src, dst;
5886 struct sctp_chunkhdr *ch;
5888 uint8_t compute_crc;
5894 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
5895 SCTP_RELEASE_PKT(i_pak);
5898 m = SCTP_HEADER_TO_CHAIN(i_pak);
5899 #ifdef SCTP_MBUF_LOGGING
5900 /* Log in any input mbufs */
5901 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5902 sctp_log_mbc(m, SCTP_MBUF_INPUT);
5905 #ifdef SCTP_PACKET_LOGGING
5906 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
5910 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
5911 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
5913 if_name(m->m_pkthdr.rcvif),
5914 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
5915 mflowid = m->m_pkthdr.flowid;
5916 mflowtype = M_HASHTYPE_GET(m);
5917 fibnum = M_GETFIB(m);
5918 SCTP_STAT_INCR(sctps_recvpackets);
5919 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
5920 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
5921 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5922 if (SCTP_BUF_LEN(m) < offset) {
5923 if ((m = m_pullup(m, offset)) == NULL) {
5924 SCTP_STAT_INCR(sctps_hdrops);
5928 ip = mtod(m, struct ip *);
5929 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
5930 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
5931 offset -= sizeof(struct sctp_chunkhdr);
5932 memset(&src, 0, sizeof(struct sockaddr_in));
5933 src.sin_family = AF_INET;
5934 src.sin_len = sizeof(struct sockaddr_in);
5935 src.sin_port = sh->src_port;
5936 src.sin_addr = ip->ip_src;
5937 memset(&dst, 0, sizeof(struct sockaddr_in));
5938 dst.sin_family = AF_INET;
5939 dst.sin_len = sizeof(struct sockaddr_in);
5940 dst.sin_port = sh->dest_port;
5941 dst.sin_addr = ip->ip_dst;
5942 length = ntohs(ip->ip_len);
5943 /* Validate mbuf chain length with IP payload length. */
5944 if (SCTP_HEADER_LEN(m) != length) {
5945 SCTPDBG(SCTP_DEBUG_INPUT1,
5946 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
5947 SCTP_STAT_INCR(sctps_hdrops);
5950 /* SCTP does not allow broadcasts or multicasts */
5951 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
5954 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
5957 ecn_bits = ip->ip_tos;
5958 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
5959 SCTP_STAT_INCR(sctps_recvhwcrc);
5962 SCTP_STAT_INCR(sctps_recvswcrc);
5965 sctp_common_input_processing(&m, iphlen, offset, length,
5966 (struct sockaddr *)&src,
5967 (struct sockaddr *)&dst,
5971 mflowtype, mflowid, fibnum,
5980 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5981 extern int *sctp_cpuarry;
5985 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
5992 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5998 uint32_t flowid, tag;
6000 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
6001 flowid = m->m_pkthdr.flowid;
6004 * No flow id built by lower layers fix it so we
6007 offset = off + sizeof(struct sctphdr);
6008 if (SCTP_BUF_LEN(m) < offset) {
6009 if ((m = m_pullup(m, offset)) == NULL) {
6010 SCTP_STAT_INCR(sctps_hdrops);
6011 return (IPPROTO_DONE);
6014 ip = mtod(m, struct ip *);
6015 sh = (struct sctphdr *)((caddr_t)ip + off);
6016 tag = htonl(sh->v_tag);
6017 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
6018 m->m_pkthdr.flowid = flowid;
6019 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE_HASH);
6021 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
6022 sctp_queue_to_mcore(m, off, cpu_to_use);
6023 return (IPPROTO_DONE);
6026 sctp_input_with_port(m, off, 0);
6027 return (IPPROTO_DONE);