2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <netinet/sctp_os.h>
39 #include <netinet/sctp_var.h>
40 #include <netinet/sctp_sysctl.h>
41 #include <netinet/sctp_pcb.h>
42 #include <netinet/sctp_header.h>
43 #include <netinet/sctputil.h>
44 #include <netinet/sctp_output.h>
45 #include <netinet/sctp_input.h>
46 #include <netinet/sctp_auth.h>
47 #include <netinet/sctp_indata.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctp_bsd_addr.h>
50 #include <netinet/sctp_timer.h>
51 #include <netinet/sctp_crc32.h>
52 #include <netinet/sctp_kdtrace.h>
53 #if defined(INET) || defined(INET6)
54 #include <netinet/udp.h>
59 sctp_stop_all_cookie_timers(struct sctp_tcb *stcb)
61 struct sctp_nets *net;
64 * This now not only stops all cookie timers it also stops any INIT
65 * timers as well. This will make sure that the timers are stopped
66 * in all collision cases.
68 SCTP_TCB_LOCK_ASSERT(stcb);
69 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
70 if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) {
71 sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE,
74 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1);
75 } else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) {
76 sctp_timer_stop(SCTP_TIMER_TYPE_INIT,
79 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2);
86 sctp_handle_init(struct mbuf *m, int iphlen, int offset,
87 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
88 struct sctp_init_chunk *cp, struct sctp_inpcb *inp,
89 struct sctp_tcb *stcb, struct sctp_nets *net,
90 uint8_t mflowtype, uint32_t mflowid,
91 uint32_t vrf_id, uint16_t port)
93 struct sctp_init *init;
96 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_init: handling INIT tcb:%p\n",
101 /* Validate parameters */
103 if (ntohl(init->initiate_tag) == 0) {
106 if ((ntohl(init->a_rwnd) < SCTP_MIN_RWND) ||
107 (ntohs(init->num_inbound_streams) == 0) ||
108 (ntohs(init->num_outbound_streams) == 0)) {
109 /* protocol error... send abort */
110 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
111 sctp_send_abort(m, iphlen, src, dst, sh, init->initiate_tag, op_err,
112 mflowtype, mflowid, inp->fibnum,
116 if (sctp_validate_init_auth_params(m, offset + sizeof(*cp),
117 offset + ntohs(cp->ch.chunk_length))) {
118 /* auth parameter(s) error... send abort */
119 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
120 "Problem with AUTH parameters");
121 sctp_send_abort(m, iphlen, src, dst, sh, init->initiate_tag, op_err,
122 mflowtype, mflowid, inp->fibnum,
126 /* We are only accepting if we have a listening socket. */
127 if ((stcb == NULL) &&
128 ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
129 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
130 (!SCTP_IS_LISTENING(inp)))) {
132 * FIX ME ?? What about TCP model and we have a
133 * match/restart case? Actually no fix is needed. the lookup
134 * will always find the existing assoc so stcb would not be
135 * NULL. It may be questionable to do this since we COULD
136 * just send back the INIT-ACK and hope that the app did
137 * accept()'s by the time the COOKIE was sent. But there is
138 * a price to pay for COOKIE generation and I don't want to
139 * pay it on the chance that the app will actually do some
140 * accepts(). The App just looses and should NOT be in this
143 if (SCTP_BASE_SYSCTL(sctp_blackhole) == 0) {
144 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
146 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
147 mflowtype, mflowid, inp->fibnum,
152 if ((stcb != NULL) &&
153 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT)) {
154 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending SHUTDOWN-ACK\n");
155 sctp_send_shutdown_ack(stcb, NULL);
156 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
158 SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending INIT-ACK\n");
159 sctp_send_initiate_ack(inp, stcb, net, m, iphlen, offset,
166 SCTP_INP_RUNLOCK(inp);
171 * process peer "INIT/INIT-ACK" chunk returns value < 0 on error
175 sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked)
179 struct sctp_stream_queue_pending *sp;
180 struct sctp_association *asoc;
182 SCTP_TCB_LOCK_ASSERT(stcb);
185 * This function returns if any stream has true unsent data on it.
186 * Note that as it looks through it will clean up any places that
187 * have old data that has been sent but left at top of stream queue.
191 if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
192 /* Check to see if some data queued */
193 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
194 /* sa_ignore FREED_MEMORY */
195 sp = TAILQ_FIRST(&stcb->asoc.strmout[i].outqueue);
199 if ((sp->msg_is_complete) &&
201 (sp->sender_all_done)) {
203 * We are doing differed cleanup. Last time
204 * through when we took all the data the
205 * sender_all_done was not set.
207 if (sp->put_last_out == 0) {
208 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
209 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
215 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
216 TAILQ_REMOVE(&stcb->asoc.strmout[i].outqueue, sp, next);
217 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, &asoc->strmout[i], sp);
219 sctp_free_remote_addr(sp->net);
223 sctp_m_freem(sp->data);
226 sctp_free_a_strmoq(stcb, sp, so_locked);
227 if (!TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
233 if (unsent_data > 0) {
238 return (unsent_data);
242 sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
244 struct sctp_init *init;
245 struct sctp_association *asoc;
246 struct sctp_nets *lnet;
249 SCTP_TCB_LOCK_ASSERT(stcb);
253 /* save off parameters */
254 asoc->peer_vtag = ntohl(init->initiate_tag);
255 asoc->peers_rwnd = ntohl(init->a_rwnd);
257 asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1;
259 if (!TAILQ_EMPTY(&asoc->nets)) {
260 /* update any ssthresh's that may have a default */
261 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
262 lnet->ssthresh = asoc->peers_rwnd;
263 if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
264 sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION);
268 if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) {
270 struct sctp_stream_out *outs;
271 struct sctp_stream_queue_pending *sp, *nsp;
272 struct sctp_tmit_chunk *chk, *nchk;
274 /* abandon the upper streams */
275 newcnt = ntohs(init->num_inbound_streams);
276 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
277 if (chk->rec.data.sid >= newcnt) {
278 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
279 asoc->send_queue_cnt--;
280 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
281 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
284 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
287 if (chk->data != NULL) {
288 sctp_free_bufspace(stcb, asoc, chk, 1);
289 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
290 0, chk, SCTP_SO_NOT_LOCKED);
292 sctp_m_freem(chk->data);
296 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
297 /* sa_ignore FREED_MEMORY */
301 for (i = newcnt; i < asoc->pre_open_streams; i++) {
302 outs = &asoc->strmout[i];
303 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
304 atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
305 TAILQ_REMOVE(&outs->outqueue, sp, next);
306 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp);
307 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL,
308 stcb, 0, sp, SCTP_SO_NOT_LOCKED);
310 sctp_m_freem(sp->data);
314 sctp_free_remote_addr(sp->net);
318 sctp_free_a_strmoq(stcb, sp, SCTP_SO_NOT_LOCKED);
319 /* sa_ignore FREED_MEMORY */
321 outs->state = SCTP_STREAM_CLOSED;
324 /* cut back the count */
325 asoc->pre_open_streams = newcnt;
327 asoc->streamoutcnt = asoc->pre_open_streams;
329 for (i = 0; i < asoc->streamoutcnt; i++) {
330 asoc->strmout[i].state = SCTP_STREAM_OPEN;
333 /* EY - nr_sack: initialize highest tsn in nr_mapping_array */
334 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
335 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
336 sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
338 /* This is the next one we expect */
339 asoc->str_reset_seq_in = asoc->asconf_seq_in + 1;
341 asoc->mapping_array_base_tsn = ntohl(init->initial_tsn);
342 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->asconf_seq_in;
344 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
345 /* open the requested streams */
347 if (asoc->strmin != NULL) {
348 /* Free the old ones */
349 for (i = 0; i < asoc->streamincnt; i++) {
350 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
351 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
353 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
355 if (asoc->max_inbound_streams > ntohs(init->num_outbound_streams)) {
356 asoc->streamincnt = ntohs(init->num_outbound_streams);
358 asoc->streamincnt = asoc->max_inbound_streams;
360 SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt *
361 sizeof(struct sctp_stream_in), SCTP_M_STRMI);
362 if (asoc->strmin == NULL) {
363 /* we didn't get memory for the streams! */
364 SCTPDBG(SCTP_DEBUG_INPUT2, "process_init: couldn't get memory for the streams!\n");
367 for (i = 0; i < asoc->streamincnt; i++) {
368 asoc->strmin[i].sid = i;
369 asoc->strmin[i].last_mid_delivered = 0xffffffff;
370 TAILQ_INIT(&asoc->strmin[i].inqueue);
371 TAILQ_INIT(&asoc->strmin[i].uno_inqueue);
372 asoc->strmin[i].pd_api_started = 0;
373 asoc->strmin[i].delivery_started = 0;
376 * load_address_from_init will put the addresses into the
377 * association when the COOKIE is processed or the INIT-ACK is
378 * processed. Both types of COOKIE's existing and new call this
379 * routine. It will remove addresses that are no longer in the
380 * association (for the restarting case where addresses are
381 * removed). Up front when the INIT arrives we will discard it if it
382 * is a restart and new addresses have been added.
384 /* sa_ignore MEMLEAK */
389 * INIT-ACK message processing/consumption returns value < 0 on error
392 sctp_process_init_ack(struct mbuf *m, int iphlen, int offset,
393 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
394 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
395 struct sctp_nets *net, int *abort_no_unlock,
396 uint8_t mflowtype, uint32_t mflowid,
399 struct sctp_association *asoc;
401 int retval, abort_flag, cookie_found;
403 int nat_friendly = 0;
405 /* First verify that we have no illegal param's */
409 op_err = sctp_arethere_unrecognized_parameters(m,
410 (offset + sizeof(struct sctp_init_chunk)),
411 &abort_flag, (struct sctp_chunkhdr *)cp,
412 &nat_friendly, &cookie_found);
414 /* Send an abort and notify peer */
415 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, false, SCTP_SO_NOT_LOCKED);
416 *abort_no_unlock = 1;
422 /* Only report the missing cookie parameter */
423 if (op_err != NULL) {
424 sctp_m_freem(op_err);
426 len = (uint16_t)(sizeof(struct sctp_error_missing_param) + sizeof(uint16_t));
427 /* We abort with an error of missing mandatory param */
428 op_err = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
429 if (op_err != NULL) {
430 struct sctp_error_missing_param *cause;
432 SCTP_BUF_LEN(op_err) = len;
433 cause = mtod(op_err, struct sctp_error_missing_param *);
434 /* Subtract the reserved param */
435 cause->cause.code = htons(SCTP_CAUSE_MISSING_PARAM);
436 cause->cause.length = htons(len);
437 cause->num_missing_params = htonl(1);
438 cause->type[0] = htons(SCTP_STATE_COOKIE);
440 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
441 src, dst, sh, op_err,
444 *abort_no_unlock = 1;
448 asoc->peer_supports_nat = (uint8_t)nat_friendly;
449 /* process the peer's parameters in the INIT-ACK */
450 if (sctp_process_init((struct sctp_init_chunk *)cp, stcb) < 0) {
451 if (op_err != NULL) {
452 sctp_m_freem(op_err);
454 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
455 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
456 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
457 src, dst, sh, op_err,
460 *abort_no_unlock = 1;
463 initack_limit = offset + ntohs(cp->ch.chunk_length);
464 /* load all addresses */
465 if ((retval = sctp_load_addresses_from_init(stcb, m,
466 offset + sizeof(struct sctp_init_chunk),
467 initack_limit, src, dst, NULL, stcb->asoc.port)) < 0) {
468 if (op_err != NULL) {
469 sctp_m_freem(op_err);
471 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
472 "Problem with address parameters");
473 SCTPDBG(SCTP_DEBUG_INPUT1,
474 "Load addresses from INIT causes an abort %d\n",
476 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
477 src, dst, sh, op_err,
480 *abort_no_unlock = 1;
483 /* if the peer doesn't support asconf, flush the asconf queue */
484 if (asoc->asconf_supported == 0) {
485 struct sctp_asconf_addr *param, *nparam;
487 TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
488 TAILQ_REMOVE(&asoc->asconf_queue, param, next);
489 SCTP_FREE(param, SCTP_M_ASC_ADDR);
493 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
494 stcb->asoc.local_hmacs);
496 sctp_queue_op_err(stcb, op_err);
497 /* queuing will steal away the mbuf chain to the out queue */
500 /* extract the cookie and queue it to "echo" it back... */
501 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
502 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
503 stcb->asoc.overall_error_count,
505 SCTP_FROM_SCTP_INPUT,
508 stcb->asoc.overall_error_count = 0;
509 net->error_count = 0;
512 * Cancel the INIT timer, We do this first before queueing the
513 * cookie. We always cancel at the primary to assume that we are
514 * canceling the timer started by the INIT which always goes to the
517 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
518 asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
520 /* calculate the RTO */
521 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
522 SCTP_RTT_FROM_NON_DATA);
523 retval = sctp_send_cookie_echo(m, offset, initack_limit, stcb, net);
528 sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp,
529 struct sctp_tcb *stcb, struct sctp_nets *net)
531 union sctp_sockstore store;
532 struct sctp_nets *r_net, *f_net;
535 uint16_t old_error_counter;
537 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) {
542 memset(&store, 0, sizeof(store));
543 switch (cp->heartbeat.hb_info.addr_family) {
546 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
547 store.sin.sin_family = cp->heartbeat.hb_info.addr_family;
548 store.sin.sin_len = cp->heartbeat.hb_info.addr_len;
549 store.sin.sin_port = stcb->rport;
550 memcpy(&store.sin.sin_addr, cp->heartbeat.hb_info.address,
551 sizeof(store.sin.sin_addr));
559 if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
560 store.sin6.sin6_family = cp->heartbeat.hb_info.addr_family;
561 store.sin6.sin6_len = cp->heartbeat.hb_info.addr_len;
562 store.sin6.sin6_port = stcb->rport;
563 memcpy(&store.sin6.sin6_addr, cp->heartbeat.hb_info.address, sizeof(struct in6_addr));
572 r_net = sctp_findnet(stcb, &store.sa);
574 SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
577 if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
578 (r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
579 (r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
581 * If the its a HB and it's random value is correct when can
582 * confirm the destination.
584 r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
585 if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
586 stcb->asoc.primary_destination = r_net;
587 r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
588 f_net = TAILQ_FIRST(&stcb->asoc.nets);
589 if (f_net != r_net) {
591 * first one on the list is NOT the primary
592 * sctp_cmpaddr() is much more efficient if
593 * the primary is the first on the list,
596 TAILQ_REMOVE(&stcb->asoc.nets, r_net, sctp_next);
597 TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
601 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
602 stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
603 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
604 r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
605 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
607 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
608 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
609 stcb->asoc.overall_error_count,
611 SCTP_FROM_SCTP_INPUT,
614 stcb->asoc.overall_error_count = 0;
615 old_error_counter = r_net->error_count;
616 r_net->error_count = 0;
617 r_net->hb_responded = 1;
618 tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
619 tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
620 /* Now lets do a RTO with this */
621 sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv,
622 SCTP_RTT_FROM_NON_DATA);
623 if ((r_net->dest_state & SCTP_ADDR_REACHABLE) == 0) {
624 r_net->dest_state |= SCTP_ADDR_REACHABLE;
625 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
626 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
628 if (r_net->dest_state & SCTP_ADDR_PF) {
629 r_net->dest_state &= ~SCTP_ADDR_PF;
630 stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
632 if (old_error_counter > 0) {
633 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
634 stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5);
635 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
637 if (r_net == stcb->asoc.primary_destination) {
638 if (stcb->asoc.alternate) {
639 /* release the alternate, primary is good */
640 sctp_free_remote_addr(stcb->asoc.alternate);
641 stcb->asoc.alternate = NULL;
644 /* Mobility adaptation */
646 if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
647 SCTP_MOBILITY_BASE) ||
648 sctp_is_mobility_feature_on(stcb->sctp_ep,
649 SCTP_MOBILITY_FASTHANDOFF)) &&
650 sctp_is_mobility_feature_on(stcb->sctp_ep,
651 SCTP_MOBILITY_PRIM_DELETED)) {
652 sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
653 stcb->sctp_ep, stcb, NULL,
654 SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
655 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
656 SCTP_MOBILITY_FASTHANDOFF)) {
657 sctp_assoc_immediate_retrans(stcb,
658 stcb->asoc.primary_destination);
660 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
661 SCTP_MOBILITY_BASE)) {
662 sctp_move_chunks_from_net(stcb,
663 stcb->asoc.deleted_primary);
665 sctp_delete_prim_timer(stcb->sctp_ep, stcb);
671 sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
674 * Return 0 means we want you to proceed with the abort non-zero
675 * means no abort processing.
678 struct sctpasochead *head;
680 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
681 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
682 atomic_add_int(&stcb->asoc.refcnt, 1);
683 SCTP_TCB_UNLOCK(stcb);
684 SCTP_INP_INFO_WLOCK();
686 atomic_subtract_int(&stcb->asoc.refcnt, 1);
690 new_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
691 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) {
692 /* generate a new vtag and send init */
693 LIST_REMOVE(stcb, sctp_asocs);
694 stcb->asoc.my_vtag = new_vtag;
695 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
697 * put it in the bucket in the vtag hash of assoc's for the
700 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
701 SCTP_INP_INFO_WUNLOCK();
702 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
706 * treat like a case where the cookie expired i.e.: - dump
707 * current cookie. - generate a new vtag. - resend init.
709 /* generate a new vtag and send init */
710 LIST_REMOVE(stcb, sctp_asocs);
711 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
712 sctp_stop_all_cookie_timers(stcb);
713 sctp_toss_old_cookies(stcb, &stcb->asoc);
714 stcb->asoc.my_vtag = new_vtag;
715 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
717 * put it in the bucket in the vtag hash of assoc's for the
720 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
721 SCTP_INP_INFO_WUNLOCK();
722 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
729 sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
730 struct sctp_nets *net)
733 * return 0 means we want you to proceed with the abort non-zero
734 * means no abort processing
736 if (stcb->asoc.auth_supported == 0) {
737 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
740 sctp_asconf_send_nat_state_update(stcb, net);
744 /* Returns 1 if the stcb was aborted, 0 otherwise */
746 sctp_handle_abort(struct sctp_abort_chunk *abort,
747 struct sctp_tcb *stcb, struct sctp_nets *net)
752 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
756 len = ntohs(abort->ch.chunk_length);
757 if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_error_cause)) {
759 * Need to check the cause codes for our two magic nat
760 * aborts which don't kill the assoc necessarily.
762 struct sctp_error_cause *cause;
764 cause = (struct sctp_error_cause *)(abort + 1);
765 error = ntohs(cause->code);
766 if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
767 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state, ABORT flags:%x\n",
768 abort->ch.chunk_flags);
769 if (sctp_handle_nat_colliding_state(stcb)) {
772 } else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
773 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state, ABORT flags:%x\n",
774 abort->ch.chunk_flags);
775 if (sctp_handle_nat_missing_state(stcb, net)) {
782 /* stop any receive timers */
783 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
784 SCTP_FROM_SCTP_INPUT + SCTP_LOC_7);
785 /* notify user of the abort and clean up... */
786 sctp_abort_notification(stcb, true, false, error, abort, SCTP_SO_NOT_LOCKED);
788 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
789 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
790 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
791 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
793 #ifdef SCTP_ASOCLOG_OF_TSNS
794 sctp_print_out_track_log(stcb);
796 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
797 SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
798 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
803 sctp_start_net_timers(struct sctp_tcb *stcb)
805 uint32_t cnt_hb_sent;
806 struct sctp_nets *net;
809 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
811 * For each network start: 1) A pmtu timer. 2) A HB timer 3)
812 * If the dest in unconfirmed send a hb as well if under
813 * max_hb_burst have been sent.
815 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
816 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
817 if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
818 (cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
819 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
824 sctp_chunk_output(stcb->sctp_ep, stcb,
825 SCTP_OUTPUT_FROM_COOKIE_ACK,
831 sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
832 struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
834 struct sctp_association *asoc;
835 int some_on_streamwheel;
838 SCTPDBG(SCTP_DEBUG_INPUT2,
839 "sctp_handle_shutdown: handling SHUTDOWN\n");
843 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
844 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
847 if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
848 /* Shutdown NOT the expected size */
851 old_state = SCTP_GET_STATE(stcb);
852 sctp_update_acked(stcb, cp, abort_flag);
856 if (asoc->control_pdapi) {
858 * With a normal shutdown we assume the end of last record.
860 SCTP_INP_READ_LOCK(stcb->sctp_ep);
861 if (asoc->control_pdapi->on_strm_q) {
862 struct sctp_stream_in *strm;
864 strm = &asoc->strmin[asoc->control_pdapi->sinfo_stream];
865 if (asoc->control_pdapi->on_strm_q == SCTP_ON_UNORDERED) {
867 TAILQ_REMOVE(&strm->uno_inqueue, asoc->control_pdapi, next_instrm);
868 asoc->control_pdapi->on_strm_q = 0;
869 } else if (asoc->control_pdapi->on_strm_q == SCTP_ON_ORDERED) {
871 TAILQ_REMOVE(&strm->inqueue, asoc->control_pdapi, next_instrm);
872 asoc->control_pdapi->on_strm_q = 0;
875 panic("Unknown state on ctrl:%p on_strm_q:%d",
877 asoc->control_pdapi->on_strm_q);
881 asoc->control_pdapi->end_added = 1;
882 asoc->control_pdapi->pdapi_aborted = 1;
883 asoc->control_pdapi = NULL;
884 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
885 if (stcb->sctp_socket) {
886 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
889 /* goto SHUTDOWN_RECEIVED state to block new requests */
890 if (stcb->sctp_socket) {
891 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
892 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
893 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
894 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_RECEIVED);
896 * notify upper layer that peer has initiated a
899 sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
902 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
905 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) {
907 * stop the shutdown timer, since we WILL move to
910 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
911 net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
913 /* Now is there unsent data on a stream somewhere? */
914 some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
916 if (!TAILQ_EMPTY(&asoc->send_queue) ||
917 !TAILQ_EMPTY(&asoc->sent_queue) ||
918 some_on_streamwheel) {
919 /* By returning we will push more data out */
922 /* no outstanding data to send, so move on... */
923 /* send SHUTDOWN-ACK */
924 /* move to SHUTDOWN-ACK-SENT state */
925 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
926 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
927 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
929 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
930 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_ACK_SENT);
931 sctp_stop_timers_for_shutdown(stcb);
932 sctp_send_shutdown_ack(stcb, net);
933 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK,
934 stcb->sctp_ep, stcb, net);
935 } else if (old_state == SCTP_STATE_SHUTDOWN_ACK_SENT) {
936 sctp_send_shutdown_ack(stcb, net);
942 sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
943 struct sctp_tcb *stcb,
944 struct sctp_nets *net)
946 struct sctp_association *asoc;
948 SCTPDBG(SCTP_DEBUG_INPUT2,
949 "sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
954 /* process according to association state */
955 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
956 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
957 /* unexpected SHUTDOWN-ACK... do OOTB handling... */
958 sctp_send_shutdown_complete(stcb, net, 1);
959 SCTP_TCB_UNLOCK(stcb);
962 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
963 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
964 /* unexpected SHUTDOWN-ACK... so ignore... */
965 SCTP_TCB_UNLOCK(stcb);
968 if (asoc->control_pdapi) {
970 * With a normal shutdown we assume the end of last record.
972 SCTP_INP_READ_LOCK(stcb->sctp_ep);
973 asoc->control_pdapi->end_added = 1;
974 asoc->control_pdapi->pdapi_aborted = 1;
975 asoc->control_pdapi = NULL;
976 SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
977 sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
980 if (!TAILQ_EMPTY(&asoc->send_queue) ||
981 !TAILQ_EMPTY(&asoc->sent_queue) ||
982 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
983 panic("Queues are not empty when handling SHUTDOWN-ACK");
987 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net,
988 SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
989 /* send SHUTDOWN-COMPLETE */
990 sctp_send_shutdown_complete(stcb, net, 0);
991 /* notify upper layer protocol */
992 if (stcb->sctp_socket) {
993 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
994 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
995 SCTP_SB_CLEAR(stcb->sctp_socket->so_snd);
997 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
999 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
1000 /* free the TCB but first save off the ep */
1001 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1002 SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
1006 sctp_process_unrecog_chunk(struct sctp_tcb *stcb, uint8_t chunk_type)
1008 switch (chunk_type) {
1009 case SCTP_ASCONF_ACK:
1011 sctp_asconf_cleanup(stcb);
1013 case SCTP_IFORWARD_CUM_TSN:
1014 case SCTP_FORWARD_CUM_TSN:
1015 stcb->asoc.prsctp_supported = 0;
1018 SCTPDBG(SCTP_DEBUG_INPUT2,
1019 "Peer does not support chunk type %d (0x%x).\n",
1020 chunk_type, chunk_type);
1026 * Skip past the param header and then we will find the param that caused the
1027 * problem. There are a number of param's in a ASCONF OR the prsctp param
1028 * these will turn of specific features.
1029 * XXX: Is this the right thing to do?
1032 sctp_process_unrecog_param(struct sctp_tcb *stcb, uint16_t parameter_type)
1034 switch (parameter_type) {
1036 case SCTP_PRSCTP_SUPPORTED:
1037 stcb->asoc.prsctp_supported = 0;
1039 case SCTP_SUPPORTED_CHUNK_EXT:
1041 /* draft-ietf-tsvwg-addip-sctp */
1042 case SCTP_HAS_NAT_SUPPORT:
1043 stcb->asoc.peer_supports_nat = 0;
1045 case SCTP_ADD_IP_ADDRESS:
1046 case SCTP_DEL_IP_ADDRESS:
1047 case SCTP_SET_PRIM_ADDR:
1048 stcb->asoc.asconf_supported = 0;
1050 case SCTP_SUCCESS_REPORT:
1051 case SCTP_ERROR_CAUSE_IND:
1052 SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
1053 SCTPDBG(SCTP_DEBUG_INPUT2,
1054 "Turning off ASCONF to this strange peer\n");
1055 stcb->asoc.asconf_supported = 0;
1058 SCTPDBG(SCTP_DEBUG_INPUT2,
1059 "Peer does not support param type %d (0x%x)??\n",
1060 parameter_type, parameter_type);
1066 sctp_handle_error(struct sctp_chunkhdr *ch,
1067 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
1069 struct sctp_error_cause *cause;
1070 struct sctp_association *asoc;
1071 uint32_t remaining_length, adjust;
1072 uint16_t code, cause_code, cause_length;
1074 /* parse through all of the errors and process */
1076 cause = (struct sctp_error_cause *)((caddr_t)ch +
1077 sizeof(struct sctp_chunkhdr));
1078 remaining_length = ntohs(ch->chunk_length);
1079 if (remaining_length > limit) {
1080 remaining_length = limit;
1082 if (remaining_length >= sizeof(struct sctp_chunkhdr)) {
1083 remaining_length -= sizeof(struct sctp_chunkhdr);
1085 remaining_length = 0;
1088 while (remaining_length >= sizeof(struct sctp_error_cause)) {
1089 /* Process an Error Cause */
1090 cause_code = ntohs(cause->code);
1091 cause_length = ntohs(cause->length);
1092 if ((cause_length > remaining_length) || (cause_length == 0)) {
1093 /* Invalid cause length, possibly due to truncation. */
1094 SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in cause - bytes left: %u cause length: %u\n",
1095 remaining_length, cause_length);
1099 /* report the first error cause */
1102 switch (cause_code) {
1103 case SCTP_CAUSE_INVALID_STREAM:
1104 case SCTP_CAUSE_MISSING_PARAM:
1105 case SCTP_CAUSE_INVALID_PARAM:
1106 case SCTP_CAUSE_NO_USER_DATA:
1107 SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %u back? We have a bug :/ (or do they?)\n",
1110 case SCTP_CAUSE_NAT_COLLIDING_STATE:
1111 SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state, ERROR flags: %x\n",
1113 if (sctp_handle_nat_colliding_state(stcb)) {
1117 case SCTP_CAUSE_NAT_MISSING_STATE:
1118 SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state, ERROR flags: %x\n",
1120 if (sctp_handle_nat_missing_state(stcb, net)) {
1124 case SCTP_CAUSE_STALE_COOKIE:
1126 * We only act if we have echoed a cookie and are
1129 if ((cause_length >= sizeof(struct sctp_error_stale_cookie)) &&
1130 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1131 struct sctp_error_stale_cookie *stale_cookie;
1133 stale_cookie = (struct sctp_error_stale_cookie *)cause;
1134 /* stable_time is in usec, convert to msec. */
1135 asoc->cookie_preserve_req = ntohl(stale_cookie->stale_time) / 1000;
1136 /* Double it to be more robust on RTX. */
1137 asoc->cookie_preserve_req *= 2;
1138 asoc->stale_cookie_count++;
1139 if (asoc->stale_cookie_count >
1140 asoc->max_init_times) {
1141 sctp_abort_notification(stcb, false, true, 0, NULL, SCTP_SO_NOT_LOCKED);
1142 /* now free the asoc */
1143 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
1144 SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
1147 /* blast back to INIT state */
1148 sctp_toss_old_cookies(stcb, &stcb->asoc);
1149 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
1150 sctp_stop_all_cookie_timers(stcb);
1151 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
1154 case SCTP_CAUSE_UNRESOLVABLE_ADDR:
1156 * Nothing we can do here, we don't do hostname
1157 * addresses so if the peer does not like my IPv6
1158 * (or IPv4 for that matter) it does not matter. If
1159 * they don't support that type of address, they can
1160 * NOT possibly get that packet type... i.e. with no
1161 * IPv6 you can't receive a IPv6 packet. so we can
1162 * safely ignore this one. If we ever added support
1163 * for HOSTNAME Addresses, then we would need to do
1167 case SCTP_CAUSE_UNRECOG_CHUNK:
1168 if (cause_length >= sizeof(struct sctp_error_unrecognized_chunk)) {
1169 struct sctp_error_unrecognized_chunk *unrec_chunk;
1171 unrec_chunk = (struct sctp_error_unrecognized_chunk *)cause;
1172 sctp_process_unrecog_chunk(stcb, unrec_chunk->ch.chunk_type);
1175 case SCTP_CAUSE_UNRECOG_PARAM:
1176 /* XXX: We only consider the first parameter */
1177 if (cause_length >= sizeof(struct sctp_error_cause) + sizeof(struct sctp_paramhdr)) {
1178 struct sctp_paramhdr *unrec_parameter;
1180 unrec_parameter = (struct sctp_paramhdr *)(cause + 1);
1181 sctp_process_unrecog_param(stcb, ntohs(unrec_parameter->param_type));
1184 case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
1186 * We ignore this since the timer will drive out a
1187 * new cookie anyway and there timer will drive us
1188 * to send a SHUTDOWN_COMPLETE. We can't send one
1189 * here since we don't have their tag.
1192 case SCTP_CAUSE_DELETING_LAST_ADDR:
1193 case SCTP_CAUSE_RESOURCE_SHORTAGE:
1194 case SCTP_CAUSE_DELETING_SRC_ADDR:
1196 * We should NOT get these here, but in a
1199 SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a error cause with code %u.\n",
1202 case SCTP_CAUSE_OUT_OF_RESC:
1204 * And what, pray tell do we do with the fact that
1205 * the peer is out of resources? Not really sure we
1206 * could do anything but abort. I suspect this
1207 * should have came WITH an abort instead of in a
1212 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown code 0x%x\n",
1216 adjust = SCTP_SIZE32(cause_length);
1217 if (remaining_length >= adjust) {
1218 remaining_length -= adjust;
1220 remaining_length = 0;
1222 cause = (struct sctp_error_cause *)((caddr_t)cause + adjust);
1224 sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, code, ch, SCTP_SO_NOT_LOCKED);
1229 sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
1230 struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
1231 struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
1232 struct sctp_nets *net, int *abort_no_unlock,
1233 uint8_t mflowtype, uint32_t mflowid,
1236 struct sctp_init_ack *init_ack;
1237 struct mbuf *op_err;
1239 SCTPDBG(SCTP_DEBUG_INPUT2,
1240 "sctp_handle_init_ack: handling INIT-ACK\n");
1243 SCTPDBG(SCTP_DEBUG_INPUT2,
1244 "sctp_handle_init_ack: TCB is null\n");
1247 /* Only process the INIT-ACK chunk in COOKIE WAIT state. */
1248 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) {
1249 init_ack = &cp->init;
1250 /* Validate parameters. */
1251 if ((ntohl(init_ack->initiate_tag) == 0) ||
1252 (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) ||
1253 (ntohs(init_ack->num_inbound_streams) == 0) ||
1254 (ntohs(init_ack->num_outbound_streams) == 0)) {
1255 /* One of the mandatory parameters is illegal. */
1256 op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
1257 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1258 src, dst, sh, op_err,
1261 *abort_no_unlock = 1;
1264 if (stcb->asoc.primary_destination->dest_state &
1265 SCTP_ADDR_UNCONFIRMED) {
1267 * The primary is where we sent the INIT, we can
1268 * always consider it confirmed when the INIT-ACK is
1269 * returned. Do this before we load addresses
1272 stcb->asoc.primary_destination->dest_state &=
1273 ~SCTP_ADDR_UNCONFIRMED;
1274 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
1275 stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
1277 if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
1278 net, abort_no_unlock,
1281 /* error in parsing parameters */
1284 /* Update our state. */
1285 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
1286 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_ECHOED);
1288 /* Reset the RTO calculation. */
1289 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
1290 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
1291 stcb->asoc.overall_error_count,
1293 SCTP_FROM_SCTP_INPUT,
1296 stcb->asoc.overall_error_count = 0;
1297 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
1299 * Collapse the init timer back in case of a exponential
1302 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
1305 * The output routine at the end of the inbound data
1306 * processing will cause the cookie to be sent.
1308 SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
1315 static struct sctp_tcb *
1316 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1317 struct sockaddr *src, struct sockaddr *dst,
1318 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1319 struct sctp_inpcb *inp, struct sctp_nets **netp,
1320 struct sockaddr *init_src, int *notification,
1321 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1322 uint8_t mflowtype, uint32_t mflowid,
1323 uint32_t vrf_id, uint16_t port);
1326 * handle a state cookie for an existing association m: input packet mbuf
1327 * chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
1328 * "split" mbuf and the cookie signature does not exist offset: offset into
1329 * mbuf to the cookie-echo chunk
1331 static struct sctp_tcb *
1332 sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
1333 struct sockaddr *src, struct sockaddr *dst,
1334 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1335 struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
1336 struct sockaddr *init_src, int *notification,
1337 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1338 uint8_t mflowtype, uint32_t mflowid,
1339 uint32_t vrf_id, uint16_t port)
1341 struct sctp_association *asoc;
1342 struct sctp_init_chunk *init_cp, init_buf;
1343 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1344 struct sctp_asconf_addr *aparam, *naparam;
1345 struct sctp_asconf_ack *aack, *naack;
1346 struct sctp_tmit_chunk *chk, *nchk;
1347 struct sctp_stream_reset_list *strrst, *nstrrst;
1348 struct sctp_queued_to_read *sq, *nsq;
1349 struct sctp_nets *net;
1350 struct mbuf *op_err;
1352 int init_offset, initack_offset, i;
1356 #if defined(SCTP_DETAILED_STR_STATS)
1361 /* I know that the TCB is non-NULL from the caller */
1363 for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
1364 if (asoc->cookie_how[how_indx] == 0)
1367 if (how_indx < sizeof(asoc->cookie_how)) {
1368 asoc->cookie_how[how_indx] = 1;
1370 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
1371 /* SHUTDOWN came in after sending INIT-ACK */
1372 sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
1373 op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
1374 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
1375 mflowtype, mflowid, inp->fibnum,
1377 if (how_indx < sizeof(asoc->cookie_how))
1378 asoc->cookie_how[how_indx] = 2;
1379 SCTP_TCB_UNLOCK(stcb);
1383 * find and validate the INIT chunk in the cookie (peer's info) the
1384 * INIT should start after the cookie-echo header struct (chunk
1385 * header, state cookie header struct)
1387 init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
1389 init_cp = (struct sctp_init_chunk *)
1390 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1391 (uint8_t *)&init_buf);
1392 if (init_cp == NULL) {
1393 /* could not pull a INIT chunk in cookie */
1394 SCTP_TCB_UNLOCK(stcb);
1397 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1398 SCTP_TCB_UNLOCK(stcb);
1402 * find and validate the INIT-ACK chunk in the cookie (my info) the
1403 * INIT-ACK follows the INIT chunk
1405 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1406 initack_cp = (struct sctp_init_ack_chunk *)
1407 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
1408 (uint8_t *)&initack_buf);
1409 if (initack_cp == NULL) {
1410 /* could not pull INIT-ACK chunk in cookie */
1411 SCTP_TCB_UNLOCK(stcb);
1414 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
1415 SCTP_TCB_UNLOCK(stcb);
1418 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1419 (ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
1421 * case D in Section 5.2.4 Table 2: MMAA process accordingly
1422 * to get into the OPEN state
1424 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1426 * Opps, this means that we somehow generated two vtag's
1427 * the same. I.e. we did:
1429 * <---INIT(tag=a)------
1430 * ----INIT-ACK(tag=t)-->
1431 * ----INIT(tag=t)------> *1
1432 * <---INIT-ACK(tag=a)---
1433 * <----CE(tag=t)------------- *2
1435 * At point *1 we should be generating a different
1436 * tag t'. Which means we would throw away the CE and send
1437 * ours instead. Basically this is case C (throw away side).
1439 if (how_indx < sizeof(asoc->cookie_how))
1440 asoc->cookie_how[how_indx] = 17;
1441 SCTP_TCB_UNLOCK(stcb);
1444 switch (SCTP_GET_STATE(stcb)) {
1445 case SCTP_STATE_COOKIE_WAIT:
1446 case SCTP_STATE_COOKIE_ECHOED:
1448 * INIT was sent but got a COOKIE_ECHO with the
1449 * correct tags... just accept it...but we must
1450 * process the init so that we can make sure we have
1451 * the right seq no's.
1453 /* First we must process the INIT !! */
1454 if (sctp_process_init(init_cp, stcb) < 0) {
1455 if (how_indx < sizeof(asoc->cookie_how))
1456 asoc->cookie_how[how_indx] = 3;
1457 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1458 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1459 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1460 src, dst, sh, op_err,
1465 /* we have already processed the INIT so no problem */
1466 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp,
1468 SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
1469 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp,
1471 SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
1472 /* update current state */
1473 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1474 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1476 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1478 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1479 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1480 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1481 stcb->sctp_ep, stcb, NULL);
1483 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1484 sctp_stop_all_cookie_timers(stcb);
1485 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1486 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1487 (!SCTP_IS_LISTENING(inp))) {
1489 * Here is where collision would go if we
1490 * did a connect() and instead got a
1491 * init/init-ack/cookie done before the
1492 * init-ack came back..
1494 sctp_pcb_add_flags(stcb->sctp_ep, SCTP_PCB_FLAGS_CONNECTED);
1495 soisconnected(stcb->sctp_socket);
1497 /* notify upper layer */
1498 *notification = SCTP_NOTIFY_ASSOC_UP;
1500 * since we did not send a HB make sure we don't
1503 old.tv_sec = cookie->time_entered.tv_sec;
1504 old.tv_usec = cookie->time_entered.tv_usec;
1505 net->hb_responded = 1;
1506 sctp_calculate_rto(stcb, asoc, net, &old,
1507 SCTP_RTT_FROM_NON_DATA);
1509 if (stcb->asoc.sctp_autoclose_ticks &&
1510 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1511 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1517 * we're in the OPEN state (or beyond), so peer must
1518 * have simply lost the COOKIE-ACK
1522 sctp_stop_all_cookie_timers(stcb);
1523 if ((retval = sctp_load_addresses_from_init(stcb, m,
1524 init_offset + sizeof(struct sctp_init_chunk),
1525 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1526 if (how_indx < sizeof(asoc->cookie_how))
1527 asoc->cookie_how[how_indx] = 4;
1528 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1529 "Problem with address parameters");
1530 SCTPDBG(SCTP_DEBUG_INPUT1,
1531 "Load addresses from INIT causes an abort %d\n",
1533 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1534 src, dst, sh, op_err,
1539 /* respond with a COOKIE-ACK */
1540 sctp_toss_old_cookies(stcb, asoc);
1541 sctp_send_cookie_ack(stcb);
1542 if (how_indx < sizeof(asoc->cookie_how))
1543 asoc->cookie_how[how_indx] = 5;
1547 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1548 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1549 cookie->tie_tag_my_vtag == 0 &&
1550 cookie->tie_tag_peer_vtag == 0) {
1552 * case C in Section 5.2.4 Table 2: XMOO silently discard
1554 if (how_indx < sizeof(asoc->cookie_how))
1555 asoc->cookie_how[how_indx] = 6;
1556 SCTP_TCB_UNLOCK(stcb);
1560 * If nat support, and the below and stcb is established, send back
1561 * a ABORT(colliding state) if we are established.
1563 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) &&
1564 (asoc->peer_supports_nat) &&
1565 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1566 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1567 (asoc->peer_vtag == 0)))) {
1569 * Special case - Peer's support nat. We may have two init's
1570 * that we gave out the same tag on since one was not
1571 * established.. i.e. we get INIT from host-1 behind the nat
1572 * and we respond tag-a, we get a INIT from host-2 behind
1573 * the nat and we get tag-a again. Then we bring up host-1
1574 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1575 * Now we have colliding state. We must send an abort here
1576 * with colliding state indication.
1578 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1579 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1580 mflowtype, mflowid, inp->fibnum,
1582 SCTP_TCB_UNLOCK(stcb);
1585 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1586 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1587 (asoc->peer_vtag == 0))) {
1589 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1590 * should be ok, re-accept peer info
1592 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1594 * Extension of case C. If we hit this, then the
1595 * random number generator returned the same vtag
1596 * when we first sent our INIT-ACK and when we later
1597 * sent our INIT. The side with the seq numbers that
1598 * are different will be the one that normally would
1599 * have hit case C. This in effect "extends" our
1600 * vtags in this collision case to be 64 bits. The
1601 * same collision could occur aka you get both vtag
1602 * and seq number the same twice in a row.. but is
1603 * much less likely. If it did happen then we would
1604 * proceed through and bring up the assoc.. we may
1605 * end up with the wrong stream setup however..
1606 * which would be bad.. but there is no way to
1607 * tell.. until we send on a stream that does not
1610 if (how_indx < sizeof(asoc->cookie_how))
1611 asoc->cookie_how[how_indx] = 7;
1613 SCTP_TCB_UNLOCK(stcb);
1616 if (how_indx < sizeof(asoc->cookie_how))
1617 asoc->cookie_how[how_indx] = 8;
1618 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1619 SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1620 sctp_stop_all_cookie_timers(stcb);
1622 * since we did not send a HB make sure we don't double
1625 net->hb_responded = 1;
1626 if (stcb->asoc.sctp_autoclose_ticks &&
1627 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1628 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1631 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1632 if (asoc->pre_open_streams < asoc->streamoutcnt) {
1633 asoc->pre_open_streams = asoc->streamoutcnt;
1636 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1638 * Ok the peer probably discarded our data (if we
1639 * echoed a cookie+data). So anything on the
1640 * sent_queue should be marked for retransmit, we
1641 * may not get something to kick us so it COULD
1642 * still take a timeout to move these.. but it can't
1643 * hurt to mark them.
1646 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1647 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1648 chk->sent = SCTP_DATAGRAM_RESEND;
1649 sctp_flight_size_decrease(chk);
1650 sctp_total_flight_decrease(stcb, chk);
1651 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1656 /* process the INIT info (peer's info) */
1657 if (sctp_process_init(init_cp, stcb) < 0) {
1658 if (how_indx < sizeof(asoc->cookie_how))
1659 asoc->cookie_how[how_indx] = 9;
1660 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1661 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1662 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1663 src, dst, sh, op_err,
1668 if ((retval = sctp_load_addresses_from_init(stcb, m,
1669 init_offset + sizeof(struct sctp_init_chunk),
1670 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1671 if (how_indx < sizeof(asoc->cookie_how))
1672 asoc->cookie_how[how_indx] = 10;
1673 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1674 "Problem with address parameters");
1675 SCTPDBG(SCTP_DEBUG_INPUT1,
1676 "Load addresses from INIT causes an abort %d\n",
1678 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1679 src, dst, sh, op_err,
1684 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
1685 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1686 *notification = SCTP_NOTIFY_ASSOC_UP;
1688 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1689 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1690 (!SCTP_IS_LISTENING(inp))) {
1691 sctp_pcb_add_flags(stcb->sctp_ep, SCTP_PCB_FLAGS_CONNECTED);
1692 soisconnected(stcb->sctp_socket);
1694 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1695 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1697 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1698 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1699 } else if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1700 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1702 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1704 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1705 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1706 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1707 stcb->sctp_ep, stcb, NULL);
1709 sctp_stop_all_cookie_timers(stcb);
1710 sctp_toss_old_cookies(stcb, asoc);
1711 sctp_send_cookie_ack(stcb);
1714 * only if we have retrans set do we do this. What
1715 * this call does is get only the COOKIE-ACK out and
1716 * then when we return the normal call to
1717 * sctp_chunk_output will get the retrans out behind
1720 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1722 if (how_indx < sizeof(asoc->cookie_how))
1723 asoc->cookie_how[how_indx] = 11;
1727 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1728 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1729 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1730 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1731 cookie->tie_tag_peer_vtag != 0) {
1732 struct sctpasochead *head;
1734 if (asoc->peer_supports_nat) {
1735 struct sctp_tcb *local_stcb;
1738 * This is a gross gross hack. Just call the
1739 * cookie_new code since we are allowing a duplicate
1740 * association. I hope this works...
1742 local_stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst,
1743 sh, cookie, cookie_len,
1744 inp, netp, init_src, notification,
1745 auth_skipped, auth_offset, auth_len,
1748 if (local_stcb == NULL) {
1749 SCTP_TCB_UNLOCK(stcb);
1751 return (local_stcb);
1754 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1757 if (how_indx < sizeof(asoc->cookie_how))
1758 asoc->cookie_how[how_indx] = 12;
1759 sctp_stop_association_timers(stcb, false);
1760 /* notify upper layer */
1761 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1762 atomic_add_int(&stcb->asoc.refcnt, 1);
1763 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_OPEN) &&
1764 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1765 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
1766 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1768 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1769 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1770 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1771 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1773 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1774 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1775 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1776 stcb->sctp_ep, stcb, NULL);
1778 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1779 /* move to OPEN state, if not in SHUTDOWN_SENT */
1780 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1782 if (asoc->pre_open_streams < asoc->streamoutcnt) {
1783 asoc->pre_open_streams = asoc->streamoutcnt;
1785 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1786 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1787 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1788 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1789 asoc->str_reset_seq_in = asoc->init_seq_number;
1790 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1791 asoc->send_sack = 1;
1792 asoc->data_pkts_seen = 0;
1793 asoc->last_data_chunk_from = NULL;
1794 asoc->last_control_chunk_from = NULL;
1795 asoc->last_net_cmt_send_started = NULL;
1796 if (asoc->mapping_array) {
1797 memset(asoc->mapping_array, 0,
1798 asoc->mapping_array_size);
1800 if (asoc->nr_mapping_array) {
1801 memset(asoc->nr_mapping_array, 0,
1802 asoc->mapping_array_size);
1804 SCTP_TCB_UNLOCK(stcb);
1805 SCTP_INP_INFO_WLOCK();
1806 SCTP_INP_WLOCK(stcb->sctp_ep);
1807 SCTP_TCB_LOCK(stcb);
1808 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1809 /* send up all the data */
1810 sctp_report_all_outbound(stcb, 0, SCTP_SO_LOCKED);
1811 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1812 stcb->asoc.strmout[i].chunks_on_queues = 0;
1813 #if defined(SCTP_DETAILED_STR_STATS)
1814 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1815 asoc->strmout[i].abandoned_sent[j] = 0;
1816 asoc->strmout[i].abandoned_unsent[j] = 0;
1819 asoc->strmout[i].abandoned_sent[0] = 0;
1820 asoc->strmout[i].abandoned_unsent[0] = 0;
1822 stcb->asoc.strmout[i].next_mid_ordered = 0;
1823 stcb->asoc.strmout[i].next_mid_unordered = 0;
1824 stcb->asoc.strmout[i].sid = i;
1825 stcb->asoc.strmout[i].last_msg_incomplete = 0;
1827 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
1828 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
1829 SCTP_FREE(strrst, SCTP_M_STRESET);
1831 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
1832 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
1834 sctp_m_freem(sq->data);
1837 sctp_free_remote_addr(sq->whoFrom);
1840 sctp_free_a_readq(stcb, sq);
1842 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
1843 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
1845 sctp_m_freem(chk->data);
1848 if (chk->holds_key_ref)
1849 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
1850 sctp_free_remote_addr(chk->whoTo);
1851 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
1852 SCTP_DECR_CHK_COUNT();
1854 asoc->ctrl_queue_cnt = 0;
1855 asoc->str_reset = NULL;
1856 asoc->stream_reset_outstanding = 0;
1857 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
1858 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
1860 sctp_m_freem(chk->data);
1863 if (chk->holds_key_ref)
1864 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
1865 sctp_free_remote_addr(chk->whoTo);
1866 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
1867 SCTP_DECR_CHK_COUNT();
1869 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
1870 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
1871 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1873 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
1874 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
1875 if (aack->data != NULL) {
1876 sctp_m_freem(aack->data);
1878 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
1881 /* process the INIT-ACK info (my info) */
1882 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
1883 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1885 /* pull from vtag hash */
1886 LIST_REMOVE(stcb, sctp_asocs);
1887 /* re-insert to new vtag position */
1888 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
1889 SCTP_BASE_INFO(hashasocmark))];
1891 * put it in the bucket in the vtag hash of assoc's for the
1894 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
1896 SCTP_INP_WUNLOCK(stcb->sctp_ep);
1897 SCTP_INP_INFO_WUNLOCK();
1898 asoc->total_flight = 0;
1899 asoc->total_flight_count = 0;
1900 /* process the INIT info (peer's info) */
1901 if (sctp_process_init(init_cp, stcb) < 0) {
1902 if (how_indx < sizeof(asoc->cookie_how))
1903 asoc->cookie_how[how_indx] = 13;
1904 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1905 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1906 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1907 src, dst, sh, op_err,
1913 * since we did not send a HB make sure we don't double
1916 net->hb_responded = 1;
1918 if ((retval = sctp_load_addresses_from_init(stcb, m,
1919 init_offset + sizeof(struct sctp_init_chunk),
1920 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1921 if (how_indx < sizeof(asoc->cookie_how))
1922 asoc->cookie_how[how_indx] = 14;
1923 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1924 "Problem with address parameters");
1925 SCTPDBG(SCTP_DEBUG_INPUT1,
1926 "Load addresses from INIT causes an abort %d\n",
1928 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1929 src, dst, sh, op_err,
1934 /* respond with a COOKIE-ACK */
1935 sctp_send_cookie_ack(stcb);
1936 if (how_indx < sizeof(asoc->cookie_how))
1937 asoc->cookie_how[how_indx] = 15;
1938 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE) &&
1939 (asoc->sctp_autoclose_ticks > 0)) {
1940 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
1944 if (how_indx < sizeof(asoc->cookie_how))
1945 asoc->cookie_how[how_indx] = 16;
1946 /* all other cases... */
1947 SCTP_TCB_UNLOCK(stcb);
1952 * handle a state cookie for a new association m: input packet mbuf chain--
1953 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
1954 * and the cookie signature does not exist offset: offset into mbuf to the
1955 * cookie-echo chunk length: length of the cookie chunk to: where the init
1956 * was from returns a new TCB
1958 static struct sctp_tcb *
1959 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1960 struct sockaddr *src, struct sockaddr *dst,
1961 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1962 struct sctp_inpcb *inp, struct sctp_nets **netp,
1963 struct sockaddr *init_src, int *notification,
1964 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1965 uint8_t mflowtype, uint32_t mflowid,
1966 uint32_t vrf_id, uint16_t port)
1968 struct sctp_tcb *stcb;
1969 struct sctp_init_chunk *init_cp, init_buf;
1970 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1971 union sctp_sockstore store;
1972 struct sctp_association *asoc;
1973 int init_offset, initack_offset, initack_limit;
1975 uint8_t auth_chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
1978 * find and validate the INIT chunk in the cookie (peer's info) the
1979 * INIT should start after the cookie-echo header struct (chunk
1980 * header, state cookie header struct)
1982 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
1983 init_cp = (struct sctp_init_chunk *)
1984 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1985 (uint8_t *)&init_buf);
1986 if (init_cp == NULL) {
1987 /* could not pull a INIT chunk in cookie */
1988 SCTPDBG(SCTP_DEBUG_INPUT1,
1989 "process_cookie_new: could not pull INIT chunk hdr\n");
1992 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1993 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
1996 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1998 * find and validate the INIT-ACK chunk in the cookie (my info) the
1999 * INIT-ACK follows the INIT chunk
2001 initack_cp = (struct sctp_init_ack_chunk *)
2002 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
2003 (uint8_t *)&initack_buf);
2004 if (initack_cp == NULL) {
2005 /* could not pull INIT-ACK chunk in cookie */
2006 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
2009 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
2013 * NOTE: We can't use the INIT_ACK's chk_length to determine the
2014 * "initack_limit" value. This is because the chk_length field
2015 * includes the length of the cookie, but the cookie is omitted when
2016 * the INIT and INIT_ACK are tacked onto the cookie...
2018 initack_limit = offset + cookie_len;
2021 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2026 * Here we do a trick, we set in NULL for the proc/thread argument.
2027 * We do this since in effect we only use the p argument when the
2028 * socket is unbound and we must do an implicit bind. Since we are
2029 * getting a cookie, we cannot be unbound.
2031 stcb = sctp_aloc_assoc(inp, init_src, &error,
2032 ntohl(initack_cp->init.initiate_tag),
2033 ntohl(initack_cp->init.initial_tsn), vrf_id,
2034 ntohs(initack_cp->init.num_outbound_streams),
2036 (struct thread *)NULL,
2037 SCTP_DONT_INITIALIZE_AUTH_PARAMS);
2039 struct mbuf *op_err;
2041 /* memory problem? */
2042 SCTPDBG(SCTP_DEBUG_INPUT1,
2043 "process_cookie_new: no room for another TCB!\n");
2044 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2045 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2046 src, dst, sh, op_err,
2052 /* get scope variables out of cookie */
2053 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2054 asoc->scope.site_scope = cookie->site_scope;
2055 asoc->scope.local_scope = cookie->local_scope;
2056 asoc->scope.loopback_scope = cookie->loopback_scope;
2058 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2059 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2060 struct mbuf *op_err;
2063 * Houston we have a problem. The EP changed while the
2064 * cookie was in flight. Only recourse is to abort the
2067 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2068 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2069 src, dst, sh, op_err,
2072 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2073 SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2076 /* process the INIT-ACK info (my info) */
2077 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2079 /* process the INIT info (peer's info) */
2080 if (sctp_process_init(init_cp, stcb) < 0) {
2081 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2082 SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2085 /* load all addresses */
2086 if (sctp_load_addresses_from_init(stcb, m,
2087 init_offset + sizeof(struct sctp_init_chunk),
2088 initack_offset, src, dst, init_src, port) < 0) {
2089 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2090 SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2094 * verify any preceding AUTH chunk that was skipped
2096 /* pull the local authentication parameters from the cookie/init-ack */
2097 sctp_auth_get_cookie_params(stcb, m,
2098 initack_offset + sizeof(struct sctp_init_ack_chunk),
2099 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2101 struct sctp_auth_chunk *auth;
2103 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
2104 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2108 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2109 /* auth HMAC failed, dump the assoc and packet */
2110 SCTPDBG(SCTP_DEBUG_AUTH1,
2111 "COOKIE-ECHO: AUTH failed\n");
2112 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2113 SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
2116 /* remaining chunks checked... good to go */
2117 stcb->asoc.authenticated = 1;
2122 * if we're doing ASCONFs, check to see if we have any new local
2123 * addresses that need to get added to the peer (eg. addresses
2124 * changed while cookie echo in flight). This needs to be done
2125 * after we go to the OPEN state to do the correct asconf
2126 * processing. else, make sure we have the correct addresses in our
2130 /* warning, we re-use sin, sin6, sa_store here! */
2131 /* pull in local_address (our "from" address) */
2132 switch (cookie->laddr_type) {
2134 case SCTP_IPV4_ADDRESS:
2135 /* source addr is IPv4 */
2136 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2137 store.sin.sin_family = AF_INET;
2138 store.sin.sin_len = sizeof(struct sockaddr_in);
2139 store.sin.sin_addr.s_addr = cookie->laddress[0];
2143 case SCTP_IPV6_ADDRESS:
2144 /* source addr is IPv6 */
2145 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2146 store.sin6.sin6_family = AF_INET6;
2147 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2148 store.sin6.sin6_scope_id = cookie->scope_id;
2149 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2153 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2154 SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
2158 /* update current state */
2159 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2160 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2161 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2162 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2163 stcb->sctp_ep, stcb, NULL);
2165 sctp_stop_all_cookie_timers(stcb);
2166 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2167 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2169 /* set up to notify upper layer */
2170 *notification = SCTP_NOTIFY_ASSOC_UP;
2171 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2172 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2173 (!SCTP_IS_LISTENING(inp))) {
2175 * This is an endpoint that called connect() how it got a
2176 * cookie that is NEW is a bit of a mystery. It must be that
2177 * the INIT was sent, but before it got there.. a complete
2178 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2179 * should have went to the other code.. not here.. oh well..
2180 * a bit of protection is worth having..
2184 sctp_pcb_add_flags(stcb->sctp_ep, SCTP_PCB_FLAGS_CONNECTED);
2185 soisconnected(stcb->sctp_socket);
2186 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2187 (SCTP_IS_LISTENING(inp))) {
2189 * We don't want to do anything with this one. Since it is
2190 * the listening guy. The timer will get started for
2191 * accepted connections in the caller.
2195 if (stcb->asoc.sctp_autoclose_ticks &&
2196 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2197 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2199 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2200 *netp = sctp_findnet(stcb, init_src);
2201 if (*netp != NULL) {
2205 * Since we did not send a HB, make sure we don't double
2208 (*netp)->hb_responded = 1;
2209 /* Calculate the RTT. */
2210 old.tv_sec = cookie->time_entered.tv_sec;
2211 old.tv_usec = cookie->time_entered.tv_usec;
2212 sctp_calculate_rto(stcb, asoc, *netp, &old, SCTP_RTT_FROM_NON_DATA);
2214 /* respond with a COOKIE-ACK */
2215 sctp_send_cookie_ack(stcb);
2218 * check the address lists for any ASCONFs that need to be sent
2219 * AFTER the cookie-ack is sent
2221 sctp_check_address_list(stcb, m,
2222 initack_offset + sizeof(struct sctp_init_ack_chunk),
2223 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2224 &store.sa, cookie->local_scope, cookie->site_scope,
2225 cookie->ipv4_scope, cookie->loopback_scope);
2231 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2232 * we NEED to make sure we are not already using the vtag. If so we
2233 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2234 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2235 SCTP_BASE_INFO(hashasocmark))];
2236 LIST_FOREACH(stcb, head, sctp_asocs) {
2237 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2238 -- SEND ABORT - TRY AGAIN --
2244 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2245 * existing (non-NULL) TCB
2247 static struct mbuf *
2248 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2249 struct sockaddr *src, struct sockaddr *dst,
2250 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2251 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2252 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2253 struct sctp_tcb **locked_tcb,
2254 uint8_t mflowtype, uint32_t mflowid,
2255 uint32_t vrf_id, uint16_t port)
2257 struct sctp_state_cookie *cookie;
2258 struct sctp_tcb *l_stcb = *stcb;
2259 struct sctp_inpcb *l_inp;
2260 struct sockaddr *to;
2261 struct sctp_pcb *ep;
2263 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2265 uint8_t cookie_ok = 0;
2266 unsigned int sig_offset, cookie_offset;
2267 unsigned int cookie_len;
2269 struct timeval time_entered, time_expires;
2270 int notification = 0;
2271 struct sctp_nets *netl;
2272 int had_a_existing_tcb = 0;
2273 int send_int_conf = 0;
2275 struct sockaddr_in sin;
2278 struct sockaddr_in6 sin6;
2281 SCTPDBG(SCTP_DEBUG_INPUT2,
2282 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2284 if (inp_p == NULL) {
2287 cookie = &cp->cookie;
2288 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2289 cookie_len = ntohs(cp->ch.chunk_length);
2291 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2292 sizeof(struct sctp_init_chunk) +
2293 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2294 /* cookie too small */
2297 if ((cookie->peerport != sh->src_port) ||
2298 (cookie->myport != sh->dest_port) ||
2299 (cookie->my_vtag != sh->v_tag)) {
2301 * invalid ports or bad tag. Note that we always leave the
2302 * v_tag in the header in network order and when we stored
2303 * it in the my_vtag slot we also left it in network order.
2304 * This maintains the match even though it may be in the
2305 * opposite byte order of the machine :->
2310 * split off the signature into its own mbuf (since it should not be
2311 * calculated in the sctp_hmac_m() call).
2313 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2314 m_sig = m_split(m, sig_offset, M_NOWAIT);
2315 if (m_sig == NULL) {
2316 /* out of memory or ?? */
2319 #ifdef SCTP_MBUF_LOGGING
2320 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2321 sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
2326 * compute the signature/digest for the cookie
2328 if (l_stcb != NULL) {
2329 atomic_add_int(&l_stcb->asoc.refcnt, 1);
2330 SCTP_TCB_UNLOCK(l_stcb);
2333 SCTP_INP_RLOCK(l_inp);
2334 if (l_stcb != NULL) {
2335 SCTP_TCB_LOCK(l_stcb);
2336 atomic_subtract_int(&l_stcb->asoc.refcnt, 1);
2338 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2339 SCTP_INP_RUNLOCK(l_inp);
2340 sctp_m_freem(m_sig);
2343 ep = &(*inp_p)->sctp_ep;
2344 /* which cookie is it? */
2345 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2346 (ep->current_secret_number != ep->last_secret_number)) {
2347 /* it's the old cookie */
2348 (void)sctp_hmac_m(SCTP_HMAC,
2349 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2350 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2352 /* it's the current cookie */
2353 (void)sctp_hmac_m(SCTP_HMAC,
2354 (uint8_t *)ep->secret_key[(int)ep->current_secret_number],
2355 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2357 /* get the signature */
2358 SCTP_INP_RUNLOCK(l_inp);
2359 sig = (uint8_t *)sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *)&tmp_sig);
2361 /* couldn't find signature */
2362 sctp_m_freem(m_sig);
2365 /* compare the received digest with the computed digest */
2366 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2367 /* try the old cookie? */
2368 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2369 (ep->current_secret_number != ep->last_secret_number)) {
2370 /* compute digest with old */
2371 (void)sctp_hmac_m(SCTP_HMAC,
2372 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2373 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2375 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2383 * Now before we continue we must reconstruct our mbuf so that
2384 * normal processing of any other chunks will work.
2390 while (SCTP_BUF_NEXT(m_at) != NULL) {
2391 m_at = SCTP_BUF_NEXT(m_at);
2393 SCTP_BUF_NEXT(m_at) = m_sig;
2396 if (cookie_ok == 0) {
2397 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2398 SCTPDBG(SCTP_DEBUG_INPUT2,
2399 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2400 (uint32_t)offset, cookie_offset, sig_offset);
2404 if (sctp_ticks_to_msecs(cookie->cookie_life) > SCTP_MAX_COOKIE_LIFE) {
2405 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: Invalid cookie lifetime\n");
2408 time_entered.tv_sec = cookie->time_entered.tv_sec;
2409 time_entered.tv_usec = cookie->time_entered.tv_usec;
2410 if ((time_entered.tv_sec < 0) ||
2411 (time_entered.tv_usec < 0) ||
2412 (time_entered.tv_usec >= 1000000)) {
2413 /* Invalid time stamp. Cookie must have been modified. */
2414 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: Invalid time stamp\n");
2417 (void)SCTP_GETTIME_TIMEVAL(&now);
2418 if (timevalcmp(&now, &time_entered, <)) {
2419 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie generated in the future!\n");
2423 * Check the cookie timestamps to be sure it's not stale.
2424 * cookie_life is in ticks, so we convert to seconds.
2426 time_expires.tv_sec = time_entered.tv_sec + sctp_ticks_to_secs(cookie->cookie_life);
2427 time_expires.tv_usec = time_entered.tv_usec;
2428 if (timevalcmp(&now, &time_expires, >)) {
2429 /* cookie is stale! */
2430 struct mbuf *op_err;
2431 struct sctp_error_stale_cookie *cause;
2432 struct timeval diff;
2435 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
2436 0, M_NOWAIT, 1, MT_DATA);
2437 if (op_err == NULL) {
2442 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
2443 cause = mtod(op_err, struct sctp_error_stale_cookie *);
2444 cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
2445 cause->cause.length = htons(sizeof(struct sctp_error_stale_cookie));
2447 timevalsub(&diff, &time_expires);
2448 if ((uint32_t)diff.tv_sec > UINT32_MAX / 1000000) {
2449 staleness = UINT32_MAX;
2451 staleness = (uint32_t)diff.tv_sec * 1000000;
2453 if (UINT32_MAX - staleness >= (uint32_t)diff.tv_usec) {
2454 staleness += (uint32_t)diff.tv_usec;
2456 staleness = UINT32_MAX;
2458 cause->stale_time = htonl(staleness);
2459 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2460 mflowtype, mflowid, l_inp->fibnum,
2465 * Now we must see with the lookup address if we have an existing
2466 * asoc. This will only happen if we were in the COOKIE-WAIT state
2467 * and a INIT collided with us and somewhere the peer sent the
2468 * cookie on another address besides the single address our assoc
2469 * had for him. In this case we will have one of the tie-tags set at
2470 * least AND the address field in the cookie can be used to look it
2474 switch (cookie->addr_type) {
2476 case SCTP_IPV6_ADDRESS:
2477 memset(&sin6, 0, sizeof(sin6));
2478 sin6.sin6_family = AF_INET6;
2479 sin6.sin6_len = sizeof(sin6);
2480 sin6.sin6_port = sh->src_port;
2481 sin6.sin6_scope_id = cookie->scope_id;
2482 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2483 sizeof(sin6.sin6_addr.s6_addr));
2484 to = (struct sockaddr *)&sin6;
2488 case SCTP_IPV4_ADDRESS:
2489 memset(&sin, 0, sizeof(sin));
2490 sin.sin_family = AF_INET;
2491 sin.sin_len = sizeof(sin);
2492 sin.sin_port = sh->src_port;
2493 sin.sin_addr.s_addr = cookie->address[0];
2494 to = (struct sockaddr *)&sin;
2498 /* This should not happen */
2501 if (*stcb == NULL) {
2502 /* Yep, lets check */
2503 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2504 if (*stcb == NULL) {
2506 * We should have only got back the same inp. If we
2507 * got back a different ep we have a problem. The
2508 * original findep got back l_inp and now
2510 if (l_inp != *inp_p) {
2511 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2514 if (*locked_tcb == NULL) {
2516 * In this case we found the assoc only
2517 * after we locked the create lock. This
2518 * means we are in a colliding case and we
2519 * must make sure that we unlock the tcb if
2520 * its one of the cases where we throw away
2521 * the incoming packets.
2523 *locked_tcb = *stcb;
2526 * We must also increment the inp ref count
2527 * since the ref_count flags was set when we
2528 * did not find the TCB, now we found it
2529 * which reduces the refcount.. we must
2530 * raise it back out to balance it all :-)
2532 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2533 if ((*stcb)->sctp_ep != l_inp) {
2534 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2535 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2541 cookie_len -= SCTP_SIGNATURE_SIZE;
2542 if (*stcb == NULL) {
2543 /* this is the "normal" case... get a new TCB */
2544 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2545 cookie, cookie_len, *inp_p,
2546 netp, to, ¬ification,
2547 auth_skipped, auth_offset, auth_len,
2551 /* this is abnormal... cookie-echo on existing TCB */
2552 had_a_existing_tcb = 1;
2553 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2555 cookie, cookie_len, *inp_p, *stcb, netp, to,
2556 ¬ification, auth_skipped, auth_offset, auth_len,
2559 if (*stcb == NULL) {
2564 if (*stcb == NULL) {
2565 /* still no TCB... must be bad cookie-echo */
2568 if (*netp != NULL) {
2569 (*netp)->flowtype = mflowtype;
2570 (*netp)->flowid = mflowid;
2573 * Ok, we built an association so confirm the address we sent the
2576 netl = sctp_findnet(*stcb, to);
2578 * This code should in theory NOT run but
2581 /* TSNH! Huh, why do I need to add this address here? */
2582 if (sctp_add_remote_addr(*stcb, to, NULL, port,
2583 SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2586 netl = sctp_findnet(*stcb, to);
2589 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2590 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2591 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2596 sctp_start_net_timers(*stcb);
2597 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2598 if (!had_a_existing_tcb ||
2599 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2601 * If we have a NEW cookie or the connect never
2602 * reached the connected state during collision we
2603 * must do the TCP accept thing.
2605 struct socket *so, *oso;
2606 struct sctp_inpcb *inp;
2608 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2610 * For a restart we will keep the same
2611 * socket, no need to do anything. I THINK!!
2613 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2614 if (send_int_conf) {
2615 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2616 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2620 oso = (*inp_p)->sctp_socket;
2621 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2622 SCTP_TCB_UNLOCK((*stcb));
2623 CURVNET_SET(oso->so_vnet);
2624 so = sonewconn(oso, 0
2627 SCTP_TCB_LOCK((*stcb));
2628 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2631 struct mbuf *op_err;
2633 /* Too many sockets */
2634 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2635 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2636 sctp_abort_association(*inp_p, NULL, m, iphlen,
2637 src, dst, sh, op_err,
2640 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2641 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2644 inp = (struct sctp_inpcb *)so->so_pcb;
2645 SCTP_INP_INCR_REF(inp);
2647 * We add the unbound flag here so that if we get an
2648 * soabort() before we get the move_pcb done, we
2649 * will properly cleanup.
2651 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2652 SCTP_PCB_FLAGS_CONNECTED |
2653 SCTP_PCB_FLAGS_IN_TCPPOOL |
2654 SCTP_PCB_FLAGS_UNBOUND |
2655 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2656 SCTP_PCB_FLAGS_DONT_WAKE);
2657 inp->sctp_features = (*inp_p)->sctp_features;
2658 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2659 inp->sctp_socket = so;
2660 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2661 inp->max_cwnd = (*inp_p)->max_cwnd;
2662 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2663 inp->ecn_supported = (*inp_p)->ecn_supported;
2664 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2665 inp->auth_supported = (*inp_p)->auth_supported;
2666 inp->asconf_supported = (*inp_p)->asconf_supported;
2667 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2668 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2669 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2670 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2671 inp->sctp_context = (*inp_p)->sctp_context;
2672 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2673 inp->fibnum = (*inp_p)->fibnum;
2675 * copy in the authentication parameters from the
2678 if (inp->sctp_ep.local_hmacs)
2679 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2680 inp->sctp_ep.local_hmacs =
2681 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2682 if (inp->sctp_ep.local_auth_chunks)
2683 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2684 inp->sctp_ep.local_auth_chunks =
2685 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2688 * Now we must move it from one hash table to
2689 * another and get the tcb in the right place.
2693 * This is where the one-2-one socket is put into
2694 * the accept state waiting for the accept!
2697 SCTP_ADD_SUBSTATE(*stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
2699 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2701 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2702 SCTP_TCB_UNLOCK((*stcb));
2704 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2706 SCTP_TCB_LOCK((*stcb));
2707 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2710 * now we must check to see if we were aborted while
2711 * the move was going on and the lock/unlock
2714 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2716 * yep it was, we leave the assoc attached
2717 * to the socket since the sctp_inpcb_free()
2718 * call will send an abort for us.
2720 SCTP_INP_DECR_REF(inp);
2723 SCTP_INP_DECR_REF(inp);
2724 /* Switch over to the new guy */
2726 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2727 if (send_int_conf) {
2728 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2729 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2733 * Pull it from the incomplete queue and wake the
2741 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2743 if (send_int_conf) {
2744 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2745 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2751 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2752 struct sctp_tcb *stcb, struct sctp_nets *net)
2754 /* cp must not be used, others call this without a c-ack :-) */
2755 struct sctp_association *asoc;
2756 struct sctp_tmit_chunk *chk;
2758 SCTPDBG(SCTP_DEBUG_INPUT2,
2759 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2760 if ((stcb == NULL) || (net == NULL)) {
2765 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
2766 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
2767 asoc->overall_error_count,
2769 SCTP_FROM_SCTP_INPUT,
2772 asoc->overall_error_count = 0;
2773 sctp_stop_all_cookie_timers(stcb);
2774 /* process according to association state */
2775 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
2776 /* state change only needed when I am in right state */
2777 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2778 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2779 sctp_start_net_timers(stcb);
2780 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2781 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2782 stcb->sctp_ep, stcb, NULL);
2785 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2786 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2787 if (asoc->overall_error_count == 0) {
2788 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
2789 SCTP_RTT_FROM_NON_DATA);
2791 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2792 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2793 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2794 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2795 sctp_pcb_add_flags(stcb->sctp_ep, SCTP_PCB_FLAGS_CONNECTED);
2796 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
2797 soisconnected(stcb->sctp_socket);
2801 * since we did not send a HB make sure we don't double
2804 net->hb_responded = 1;
2806 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2808 * We don't need to do the asconf thing, nor hb or
2809 * autoclose if the socket is closed.
2814 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
2817 if (stcb->asoc.sctp_autoclose_ticks &&
2818 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2819 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
2820 stcb->sctp_ep, stcb, NULL);
2823 * send ASCONF if parameters are pending and ASCONFs are
2824 * allowed (eg. addresses changed when init/cookie echo were
2827 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
2828 (stcb->asoc.asconf_supported == 1) &&
2829 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
2830 #ifdef SCTP_TIMER_BASED_ASCONF
2831 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2832 stcb->sctp_ep, stcb,
2833 stcb->asoc.primary_destination);
2835 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2836 SCTP_ADDR_NOT_LOCKED);
2841 /* Toss the cookie if I can */
2842 sctp_toss_old_cookies(stcb, asoc);
2843 /* Restart the timer if we have pending data */
2844 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
2845 if (chk->whoTo != NULL) {
2850 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
2855 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
2856 struct sctp_tcb *stcb)
2858 struct sctp_nets *net;
2859 struct sctp_tmit_chunk *lchk;
2860 struct sctp_ecne_chunk bkup;
2861 uint8_t override_bit;
2862 uint32_t tsn, window_data_tsn;
2864 unsigned int pkt_cnt;
2866 len = ntohs(cp->ch.chunk_length);
2867 if (len == sizeof(struct old_sctp_ecne_chunk)) {
2868 /* Its the old format */
2869 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
2870 bkup.num_pkts_since_cwr = htonl(1);
2873 SCTP_STAT_INCR(sctps_recvecne);
2874 tsn = ntohl(cp->tsn);
2875 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
2876 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
2878 window_data_tsn = stcb->asoc.sending_seq - 1;
2880 window_data_tsn = lchk->rec.data.tsn;
2883 /* Find where it was sent to if possible. */
2885 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
2886 if (lchk->rec.data.tsn == tsn) {
2888 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
2891 if (SCTP_TSN_GT(lchk->rec.data.tsn, tsn)) {
2897 * What to do. A previous send of a CWR was possibly lost.
2898 * See how old it is, we may have it marked on the actual
2901 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2902 if (tsn == net->last_cwr_tsn) {
2903 /* Found him, send it off */
2909 * If we reach here, we need to send a special CWR
2910 * that says hey, we did this a long time ago and
2911 * you lost the response.
2913 net = TAILQ_FIRST(&stcb->asoc.nets);
2918 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
2925 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
2926 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2928 * JRS - Use the congestion control given in the pluggable
2931 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
2933 * We reduce once every RTT. So we will only lower cwnd at
2934 * the next sending seq i.e. the window_data_tsn
2936 net->cwr_window_tsn = window_data_tsn;
2937 net->ecn_ce_pkt_cnt += pkt_cnt;
2938 net->lost_cnt = pkt_cnt;
2939 net->last_cwr_tsn = tsn;
2941 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
2942 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
2943 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2945 * Another loss in the same window update how many
2946 * marks/packets lost we have had.
2950 if (pkt_cnt > net->lost_cnt) {
2951 /* Should be the case */
2952 cnt = (pkt_cnt - net->lost_cnt);
2953 net->ecn_ce_pkt_cnt += cnt;
2955 net->lost_cnt = pkt_cnt;
2956 net->last_cwr_tsn = tsn;
2958 * Most CC functions will ignore this call, since we
2959 * are in-window yet of the initial CE the peer saw.
2961 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
2965 * We always send a CWR this way if our previous one was lost our
2966 * peer will get an update, or if it is not time again to reduce we
2967 * still get the cwr to the peer. Note we set the override when we
2968 * could not find the TSN on the chunk or the destination network.
2970 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
2974 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
2977 * Here we get a CWR from the peer. We must look in the outqueue and
2978 * make sure that we have a covered ECNE in the control chunk part.
2981 struct sctp_tmit_chunk *chk, *nchk;
2982 struct sctp_ecne_chunk *ecne;
2986 cwr_tsn = ntohl(cp->tsn);
2987 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
2988 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.control_send_queue, sctp_next, nchk) {
2989 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
2992 if ((override == 0) && (chk->whoTo != net)) {
2993 /* Must be from the right src unless override is set */
2996 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
2997 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
2998 /* this covers this ECNE, we can remove it */
2999 stcb->asoc.ecn_echo_cnt_onq--;
3000 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
3002 stcb->asoc.ctrl_queue_cnt--;
3003 sctp_m_freem(chk->data);
3005 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3006 if (override == 0) {
3014 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3015 struct sctp_tcb *stcb, struct sctp_nets *net)
3018 SCTPDBG(SCTP_DEBUG_INPUT2,
3019 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3023 /* process according to association state */
3024 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3025 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3026 SCTPDBG(SCTP_DEBUG_INPUT2,
3027 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3028 SCTP_TCB_UNLOCK(stcb);
3031 /* notify upper layer protocol */
3032 if (stcb->sctp_socket) {
3033 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3036 if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
3037 !TAILQ_EMPTY(&stcb->asoc.sent_queue) ||
3038 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
3039 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3042 /* stop the timer */
3043 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3044 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3045 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3047 SCTPDBG(SCTP_DEBUG_INPUT2,
3048 "sctp_handle_shutdown_complete: calls free-asoc\n");
3049 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3050 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3055 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3056 struct sctp_nets *net, uint8_t flg)
3058 switch (desc->chunk_type) {
3061 /* find the tsn to resend (possibly) */
3064 struct sctp_tmit_chunk *tp1;
3066 tsn = ntohl(desc->tsn_ifany);
3067 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3068 if (tp1->rec.data.tsn == tsn) {
3072 if (SCTP_TSN_GT(tp1->rec.data.tsn, tsn)) {
3080 * Do it the other way , aka without paying
3081 * attention to queue seq order.
3083 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3084 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3085 if (tp1->rec.data.tsn == tsn) {
3092 SCTP_STAT_INCR(sctps_pdrptsnnf);
3094 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3095 if (((flg & SCTP_BADCRC) == 0) &&
3096 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3099 if ((stcb->asoc.peers_rwnd == 0) &&
3100 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3101 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3104 if (stcb->asoc.peers_rwnd == 0 &&
3105 (flg & SCTP_FROM_MIDDLE_BOX)) {
3106 SCTP_STAT_INCR(sctps_pdrpdizrw);
3109 if ((uint32_t)SCTP_BUF_LEN(tp1->data) <
3110 SCTP_DATA_CHUNK_OVERHEAD(stcb) + SCTP_NUM_DB_TO_VERIFY) {
3111 /* Payload not matching. */
3112 SCTP_STAT_INCR(sctps_pdrpbadd);
3115 if (memcmp(mtod(tp1->data, caddr_t)+SCTP_DATA_CHUNK_OVERHEAD(stcb),
3116 desc->data_bytes, SCTP_NUM_DB_TO_VERIFY) != 0) {
3117 /* Payload not matching. */
3118 SCTP_STAT_INCR(sctps_pdrpbadd);
3123 * this guy had a RTO calculation
3124 * pending on it, cancel it
3126 if (tp1->whoTo->rto_needed == 0) {
3127 tp1->whoTo->rto_needed = 1;
3131 SCTP_STAT_INCR(sctps_pdrpmark);
3132 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3133 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3135 * mark it as if we were doing a FR, since
3136 * we will be getting gap ack reports behind
3137 * the info from the router.
3139 tp1->rec.data.doing_fast_retransmit = 1;
3141 * mark the tsn with what sequences can
3144 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3145 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3147 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
3150 /* restart the timer */
3151 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3153 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3154 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3157 /* fix counts and things */
3158 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3159 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3160 tp1->whoTo->flight_size,
3162 (uint32_t)(uintptr_t)stcb,
3165 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3166 sctp_flight_size_decrease(tp1);
3167 sctp_total_flight_decrease(stcb, tp1);
3169 tp1->sent = SCTP_DATAGRAM_RESEND;
3175 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3176 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3179 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3181 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3184 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3185 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3186 audit, stcb->asoc.sent_queue_retran_cnt);
3187 #ifndef SCTP_AUDITING_ENABLED
3188 stcb->asoc.sent_queue_retran_cnt = audit;
3196 struct sctp_tmit_chunk *asconf;
3198 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3200 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3205 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3206 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3207 asconf->sent = SCTP_DATAGRAM_RESEND;
3208 asconf->snd_count--;
3212 case SCTP_INITIATION:
3213 /* resend the INIT */
3214 stcb->asoc.dropped_special_cnt++;
3215 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3217 * If we can get it in, in a few attempts we do
3218 * this, otherwise we let the timer fire.
3220 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3222 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3223 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3226 case SCTP_SELECTIVE_ACK:
3227 case SCTP_NR_SELECTIVE_ACK:
3228 /* resend the sack */
3229 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3231 case SCTP_HEARTBEAT_REQUEST:
3232 /* resend a demand HB */
3233 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3235 * Only retransmit if we KNOW we wont destroy the
3238 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3242 sctp_send_shutdown(stcb, net);
3244 case SCTP_SHUTDOWN_ACK:
3245 sctp_send_shutdown_ack(stcb, net);
3247 case SCTP_COOKIE_ECHO:
3249 struct sctp_tmit_chunk *cookie;
3252 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3254 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3259 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3260 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3261 cookie->sent = SCTP_DATAGRAM_RESEND;
3262 sctp_stop_all_cookie_timers(stcb);
3266 case SCTP_COOKIE_ACK:
3267 sctp_send_cookie_ack(stcb);
3269 case SCTP_ASCONF_ACK:
3270 /* resend last asconf ack */
3271 sctp_send_asconf_ack(stcb);
3273 case SCTP_IFORWARD_CUM_TSN:
3274 case SCTP_FORWARD_CUM_TSN:
3275 send_forward_tsn(stcb, &stcb->asoc);
3277 /* can't do anything with these */
3278 case SCTP_PACKET_DROPPED:
3279 case SCTP_INITIATION_ACK: /* this should not happen */
3280 case SCTP_HEARTBEAT_ACK:
3281 case SCTP_ABORT_ASSOCIATION:
3282 case SCTP_OPERATION_ERROR:
3283 case SCTP_SHUTDOWN_COMPLETE:
3293 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3299 * We set things to 0xffffffff since this is the last delivered
3300 * sequence and we will be sending in 0 after the reset.
3303 if (number_entries) {
3304 for (i = 0; i < number_entries; i++) {
3305 temp = ntohs(list[i]);
3306 if (temp >= stcb->asoc.streamincnt) {
3309 stcb->asoc.strmin[temp].last_mid_delivered = 0xffffffff;
3313 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3314 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3317 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3321 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3326 if (number_entries > 0) {
3327 for (i = 0; i < number_entries; i++) {
3328 temp = ntohs(list[i]);
3329 if (temp >= stcb->asoc.streamoutcnt) {
3330 /* no such stream */
3333 stcb->asoc.strmout[temp].next_mid_ordered = 0;
3334 stcb->asoc.strmout[temp].next_mid_unordered = 0;
3337 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3338 stcb->asoc.strmout[i].next_mid_ordered = 0;
3339 stcb->asoc.strmout[i].next_mid_unordered = 0;
3342 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3346 sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3351 if (number_entries > 0) {
3352 for (i = 0; i < number_entries; i++) {
3353 temp = ntohs(list[i]);
3354 if (temp >= stcb->asoc.streamoutcnt) {
3355 /* no such stream */
3358 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3361 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3362 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3367 struct sctp_stream_reset_request *
3368 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3370 struct sctp_association *asoc;
3371 struct sctp_chunkhdr *ch;
3372 struct sctp_stream_reset_request *r;
3373 struct sctp_tmit_chunk *chk;
3377 chk = asoc->str_reset;
3378 if (TAILQ_EMPTY(&asoc->control_send_queue) ||
3380 asoc->stream_reset_outstanding = 0;
3383 if (chk->data == NULL) {
3387 /* he wants a copy of the chk pointer */
3390 clen = chk->send_size;
3391 ch = mtod(chk->data, struct sctp_chunkhdr *);
3392 r = (struct sctp_stream_reset_request *)(ch + 1);
3393 if (ntohl(r->request_seq) == seq) {
3397 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3398 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3399 /* move to the next one, there can only be a max of two */
3400 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3401 if (ntohl(r->request_seq) == seq) {
3405 /* that seq is not here */
3410 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3412 struct sctp_association *asoc;
3413 struct sctp_tmit_chunk *chk;
3416 chk = asoc->str_reset;
3420 asoc->str_reset = NULL;
3421 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3422 NULL, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3423 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3424 asoc->ctrl_queue_cnt--;
3426 sctp_m_freem(chk->data);
3429 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3433 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3434 uint32_t seq, uint32_t action,
3435 struct sctp_stream_reset_response *respin)
3439 struct sctp_association *asoc = &stcb->asoc;
3440 struct sctp_tmit_chunk *chk;
3441 struct sctp_stream_reset_request *req_param;
3442 struct sctp_stream_reset_out_request *req_out_param;
3443 struct sctp_stream_reset_in_request *req_in_param;
3444 uint32_t number_entries;
3446 if (asoc->stream_reset_outstanding == 0) {
3450 if (seq == stcb->asoc.str_reset_seq_out) {
3451 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3452 if (req_param != NULL) {
3453 stcb->asoc.str_reset_seq_out++;
3454 type = ntohs(req_param->ph.param_type);
3455 lparam_len = ntohs(req_param->ph.param_length);
3456 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3459 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3460 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3461 asoc->stream_reset_out_is_outstanding = 0;
3462 if (asoc->stream_reset_outstanding)
3463 asoc->stream_reset_outstanding--;
3464 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3466 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3467 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3468 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3469 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3471 * Set it up so we don't stop
3474 asoc->stream_reset_outstanding++;
3475 stcb->asoc.str_reset_seq_out--;
3476 asoc->stream_reset_out_is_outstanding = 1;
3479 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3481 if (no_clear == 0) {
3482 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3484 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3485 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3486 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3487 if (asoc->stream_reset_outstanding)
3488 asoc->stream_reset_outstanding--;
3489 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3490 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3491 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3492 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3493 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3494 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3496 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3497 /* Ok we now may have more streams */
3500 num_stream = stcb->asoc.strm_pending_add_size;
3501 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3503 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3505 stcb->asoc.strm_pending_add_size = 0;
3506 if (asoc->stream_reset_outstanding)
3507 asoc->stream_reset_outstanding--;
3508 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3509 /* Put the new streams into effect */
3512 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3513 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3515 asoc->streamoutcnt += num_stream;
3516 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3517 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3518 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3519 SCTP_STREAM_CHANGE_DENIED);
3521 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3522 SCTP_STREAM_CHANGE_FAILED);
3524 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3525 if (asoc->stream_reset_outstanding)
3526 asoc->stream_reset_outstanding--;
3527 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3528 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3529 SCTP_STREAM_CHANGE_DENIED);
3530 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3531 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3532 SCTP_STREAM_CHANGE_FAILED);
3534 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3536 * a) Adopt the new in tsn.
3538 * c) Adopt the new out-tsn
3540 struct sctp_stream_reset_response_tsn *resp;
3541 struct sctp_forward_tsn_chunk fwdtsn;
3544 if (respin == NULL) {
3548 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3551 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3552 resp = (struct sctp_stream_reset_response_tsn *)respin;
3553 asoc->stream_reset_outstanding--;
3554 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3555 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3556 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3557 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3561 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3562 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3563 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3566 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3567 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3568 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3570 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3571 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3573 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3574 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3576 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3577 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3578 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3579 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3580 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3581 SCTP_ASSOC_RESET_DENIED);
3583 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3584 SCTP_ASSOC_RESET_FAILED);
3587 /* get rid of the request and get the request flags */
3588 if (asoc->stream_reset_outstanding == 0) {
3589 sctp_clean_up_stream_reset(stcb);
3593 if (asoc->stream_reset_outstanding == 0) {
3594 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3600 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3601 struct sctp_tmit_chunk *chk,
3602 struct sctp_stream_reset_in_request *req, int trunc)
3610 * peer wants me to send a str-reset to him for my outgoing seq's if
3613 struct sctp_association *asoc = &stcb->asoc;
3615 seq = ntohl(req->request_seq);
3616 if (asoc->str_reset_seq_in == seq) {
3617 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3618 if ((asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ) == 0) {
3619 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3621 /* Can't do it, since they exceeded our buffer size */
3622 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3623 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3624 len = ntohs(req->ph.param_length);
3625 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3626 if (number_entries) {
3627 for (i = 0; i < number_entries; i++) {
3628 temp = ntohs(req->list_of_streams[i]);
3629 if (temp >= stcb->asoc.streamoutcnt) {
3630 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3633 req->list_of_streams[i] = temp;
3635 for (i = 0; i < number_entries; i++) {
3636 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3637 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3642 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3643 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3644 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3647 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3649 /* Can't do it, since we have sent one out */
3650 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3653 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3654 asoc->str_reset_seq_in++;
3655 } else if (asoc->str_reset_seq_in - 1 == seq) {
3656 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3657 } else if (asoc->str_reset_seq_in - 2 == seq) {
3658 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3660 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3662 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3666 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3667 struct sctp_tmit_chunk *chk,
3668 struct sctp_stream_reset_tsn_request *req)
3670 /* reset all in and out and update the tsn */
3672 * A) reset my str-seq's on in and out. B) Select a receive next,
3673 * and set cum-ack to it. Also process this selected number as a
3674 * fwd-tsn as well. C) set in the response my next sending seq.
3676 struct sctp_forward_tsn_chunk fwdtsn;
3677 struct sctp_association *asoc = &stcb->asoc;
3681 seq = ntohl(req->request_seq);
3682 if (asoc->str_reset_seq_in == seq) {
3683 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3684 if ((asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ) == 0) {
3685 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3687 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3688 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3689 fwdtsn.ch.chunk_flags = 0;
3690 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3691 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3695 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3696 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3697 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3699 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3700 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3701 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3702 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3703 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3704 atomic_add_int(&asoc->sending_seq, 1);
3705 /* save off historical data for retrans */
3706 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3707 asoc->last_sending_seq[0] = asoc->sending_seq;
3708 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3709 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3710 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3711 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3712 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3713 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3715 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3716 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3717 asoc->str_reset_seq_in++;
3718 } else if (asoc->str_reset_seq_in - 1 == seq) {
3719 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3720 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3721 } else if (asoc->str_reset_seq_in - 2 == seq) {
3722 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3723 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3725 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3731 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3732 struct sctp_tmit_chunk *chk,
3733 struct sctp_stream_reset_out_request *req, int trunc)
3736 int number_entries, len;
3737 struct sctp_association *asoc = &stcb->asoc;
3739 seq = ntohl(req->request_seq);
3741 /* now if its not a duplicate we process it */
3742 if (asoc->str_reset_seq_in == seq) {
3743 len = ntohs(req->ph.param_length);
3744 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3746 * the sender is resetting, handle the list issue.. we must
3747 * a) verify if we can do the reset, if so no problem b) If
3748 * we can't do the reset we must copy the request. c) queue
3749 * it, and setup the data in processor to trigger it off
3750 * when needed and dequeue all the queued data.
3752 tsn = ntohl(req->send_reset_at_tsn);
3754 /* move the reset action back one */
3755 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3756 if ((asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ) == 0) {
3757 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3759 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3760 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
3761 /* we can do it now */
3762 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
3763 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3766 * we must queue it up and thus wait for the TSN's
3767 * to arrive that are at or before tsn
3769 struct sctp_stream_reset_list *liste;
3772 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
3773 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
3774 siz, SCTP_M_STRESET);
3775 if (liste == NULL) {
3776 /* gak out of memory */
3777 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3778 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3783 liste->number_entries = number_entries;
3784 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
3785 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
3786 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
3788 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3789 asoc->str_reset_seq_in++;
3790 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3792 * one seq back, just echo back last action since my
3793 * response was lost.
3795 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3796 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3798 * two seq back, just echo back last action since my
3799 * response was lost.
3801 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3803 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3808 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3809 struct sctp_stream_reset_add_strm *str_add)
3812 * Peer is requesting to add more streams. If its within our
3813 * max-streams we will allow it.
3815 uint32_t num_stream, i;
3817 struct sctp_association *asoc = &stcb->asoc;
3818 struct sctp_queued_to_read *ctl, *nctl;
3820 /* Get the number. */
3821 seq = ntohl(str_add->request_seq);
3822 num_stream = ntohs(str_add->number_of_streams);
3823 /* Now what would be the new total? */
3824 if (asoc->str_reset_seq_in == seq) {
3825 num_stream += stcb->asoc.streamincnt;
3826 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3827 if ((asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ) == 0) {
3828 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3829 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
3830 (num_stream > 0xffff)) {
3831 /* We must reject it they ask for to many */
3833 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3835 /* Ok, we can do that :-) */
3836 struct sctp_stream_in *oldstrm;
3838 /* save off the old */
3839 oldstrm = stcb->asoc.strmin;
3840 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
3841 (num_stream * sizeof(struct sctp_stream_in)),
3843 if (stcb->asoc.strmin == NULL) {
3844 stcb->asoc.strmin = oldstrm;
3847 /* copy off the old data */
3848 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3849 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3850 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3851 stcb->asoc.strmin[i].sid = i;
3852 stcb->asoc.strmin[i].last_mid_delivered = oldstrm[i].last_mid_delivered;
3853 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
3854 stcb->asoc.strmin[i].pd_api_started = oldstrm[i].pd_api_started;
3855 /* now anything on those queues? */
3856 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next_instrm, nctl) {
3857 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next_instrm);
3858 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next_instrm);
3860 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].uno_inqueue, next_instrm, nctl) {
3861 TAILQ_REMOVE(&oldstrm[i].uno_inqueue, ctl, next_instrm);
3862 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].uno_inqueue, ctl, next_instrm);
3865 /* Init the new streams */
3866 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
3867 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3868 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3869 stcb->asoc.strmin[i].sid = i;
3870 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3871 stcb->asoc.strmin[i].pd_api_started = 0;
3872 stcb->asoc.strmin[i].delivery_started = 0;
3874 SCTP_FREE(oldstrm, SCTP_M_STRMI);
3875 /* update the size */
3876 stcb->asoc.streamincnt = num_stream;
3877 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3878 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3880 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3881 asoc->str_reset_seq_in++;
3882 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3884 * one seq back, just echo back last action since my
3885 * response was lost.
3887 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3888 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3890 * two seq back, just echo back last action since my
3891 * response was lost.
3893 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3895 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3900 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3901 struct sctp_stream_reset_add_strm *str_add)
3904 * Peer is requesting to add more streams. If its within our
3905 * max-streams we will allow it.
3907 uint16_t num_stream;
3909 struct sctp_association *asoc = &stcb->asoc;
3911 /* Get the number. */
3912 seq = ntohl(str_add->request_seq);
3913 num_stream = ntohs(str_add->number_of_streams);
3914 /* Now what would be the new total? */
3915 if (asoc->str_reset_seq_in == seq) {
3916 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3917 if ((asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ) == 0) {
3918 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3919 } else if (stcb->asoc.stream_reset_outstanding) {
3920 /* We must reject it we have something pending */
3921 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3923 /* Ok, we can do that :-) */
3926 mychk = stcb->asoc.streamoutcnt;
3927 mychk += num_stream;
3928 if (mychk < 0x10000) {
3929 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3930 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
3931 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3934 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3937 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
3938 asoc->str_reset_seq_in++;
3939 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3941 * one seq back, just echo back last action since my
3942 * response was lost.
3944 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3945 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3947 * two seq back, just echo back last action since my
3948 * response was lost.
3950 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3952 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3957 __attribute__((noinline))
3960 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3961 struct sctp_chunkhdr *ch_req)
3963 uint16_t remaining_length, param_len, ptype;
3964 struct sctp_paramhdr pstore;
3965 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
3969 struct sctp_tmit_chunk *chk;
3970 struct sctp_chunkhdr *ch;
3971 struct sctp_paramhdr *ph;
3975 /* now it may be a reset or a reset-response */
3976 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
3978 /* setup for adding the response */
3979 sctp_alloc_a_chunk(stcb, chk);
3983 chk->copy_by_ref = 0;
3984 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
3985 chk->rec.chunk_id.can_take_data = 0;
3987 chk->asoc = &stcb->asoc;
3988 chk->no_fr_allowed = 0;
3989 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
3990 chk->book_size_scale = 0;
3991 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
3992 if (chk->data == NULL) {
3995 sctp_m_freem(chk->data);
3998 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
4001 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
4003 /* setup chunk parameters */
4004 chk->sent = SCTP_DATAGRAM_UNSENT;
4008 ch = mtod(chk->data, struct sctp_chunkhdr *);
4009 ch->chunk_type = SCTP_STREAM_RESET;
4010 ch->chunk_flags = 0;
4011 ch->chunk_length = htons(chk->send_size);
4012 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4013 offset += sizeof(struct sctp_chunkhdr);
4014 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
4015 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *)&pstore);
4020 param_len = ntohs(ph->param_length);
4021 if ((param_len > remaining_length) ||
4022 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
4023 /* bad parameter length */
4026 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
4027 (uint8_t *)&cstore);
4032 ptype = ntohs(ph->param_type);
4034 if (param_len > sizeof(cstore)) {
4039 if (num_param > SCTP_MAX_RESET_PARAMS) {
4040 /* hit the max of parameters already sorry.. */
4043 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4044 struct sctp_stream_reset_out_request *req_out;
4046 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4049 req_out = (struct sctp_stream_reset_out_request *)ph;
4051 if (stcb->asoc.stream_reset_outstanding) {
4052 seq = ntohl(req_out->response_seq);
4053 if (seq == stcb->asoc.str_reset_seq_out) {
4055 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4058 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4059 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4060 struct sctp_stream_reset_add_strm *str_add;
4062 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4065 str_add = (struct sctp_stream_reset_add_strm *)ph;
4067 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4068 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4069 struct sctp_stream_reset_add_strm *str_add;
4071 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4074 str_add = (struct sctp_stream_reset_add_strm *)ph;
4076 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4077 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4078 struct sctp_stream_reset_in_request *req_in;
4081 req_in = (struct sctp_stream_reset_in_request *)ph;
4082 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4083 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4084 struct sctp_stream_reset_tsn_request *req_tsn;
4087 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4088 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4090 goto strres_nochunk;
4094 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4095 struct sctp_stream_reset_response *resp;
4098 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4101 resp = (struct sctp_stream_reset_response *)ph;
4102 seq = ntohl(resp->response_seq);
4103 result = ntohl(resp->result);
4104 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4106 goto strres_nochunk;
4111 offset += SCTP_SIZE32(param_len);
4112 if (remaining_length >= SCTP_SIZE32(param_len)) {
4113 remaining_length -= SCTP_SIZE32(param_len);
4115 remaining_length = 0;
4119 /* we have no response free the stuff */
4120 goto strres_nochunk;
4122 /* ok we have a chunk to link in */
4123 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4126 stcb->asoc.ctrl_queue_cnt++;
4131 * Handle a router or endpoints report of a packet loss, there are two ways
4132 * to handle this, either we get the whole packet and must disect it
4133 * ourselves (possibly with truncation and or corruption) or it is a summary
4134 * from a middle box that did the disecting for us.
4137 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4138 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4140 struct sctp_chunk_desc desc;
4141 struct sctp_chunkhdr *chk_hdr;
4142 struct sctp_data_chunk *data_chunk;
4143 struct sctp_idata_chunk *idata_chunk;
4144 uint32_t bottle_bw, on_queue;
4145 uint32_t offset, chk_len;
4146 uint16_t pktdrp_len;
4147 uint8_t pktdrp_flags;
4149 KASSERT(sizeof(struct sctp_pktdrop_chunk) <= limit,
4150 ("PKTDROP chunk too small"));
4151 pktdrp_flags = cp->ch.chunk_flags;
4152 pktdrp_len = ntohs(cp->ch.chunk_length);
4153 KASSERT(limit <= pktdrp_len, ("Inconsistent limit"));
4154 if (pktdrp_flags & SCTP_PACKET_TRUNCATED) {
4155 if (ntohs(cp->trunc_len) <= pktdrp_len - sizeof(struct sctp_pktdrop_chunk)) {
4156 /* The peer plays games with us. */
4160 limit -= sizeof(struct sctp_pktdrop_chunk);
4162 if (offset == limit) {
4163 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4164 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4166 } else if (offset + sizeof(struct sctphdr) > limit) {
4167 /* Only a partial SCTP common header. */
4168 SCTP_STAT_INCR(sctps_pdrpcrupt);
4171 /* XXX: Check embedded SCTP common header. */
4172 offset += sizeof(struct sctphdr);
4174 /* Now parse through the chunks themselves. */
4175 while (offset < limit) {
4176 if (offset + sizeof(struct sctp_chunkhdr) > limit) {
4177 SCTP_STAT_INCR(sctps_pdrpcrupt);
4180 chk_hdr = (struct sctp_chunkhdr *)(cp->data + offset);
4181 desc.chunk_type = chk_hdr->chunk_type;
4182 /* get amount we need to move */
4183 chk_len = (uint32_t)ntohs(chk_hdr->chunk_length);
4184 if (chk_len < sizeof(struct sctp_chunkhdr)) {
4185 /* Someone is lying... */
4188 if (desc.chunk_type == SCTP_DATA) {
4189 if (stcb->asoc.idata_supported) {
4190 /* Some is playing games with us. */
4193 if (chk_len <= sizeof(struct sctp_data_chunk)) {
4194 /* Some is playing games with us. */
4197 if (chk_len < sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4199 * Not enough data bytes available in the
4202 SCTP_STAT_INCR(sctps_pdrpnedat);
4205 if (offset + sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4206 /* Not enough data in buffer. */
4209 data_chunk = (struct sctp_data_chunk *)(cp->data + offset);
4210 memcpy(desc.data_bytes, data_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4211 desc.tsn_ifany = data_chunk->dp.tsn;
4212 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4213 SCTP_STAT_INCR(sctps_pdrpmbda);
4215 } else if (desc.chunk_type == SCTP_IDATA) {
4216 if (!stcb->asoc.idata_supported) {
4217 /* Some is playing games with us. */
4220 if (chk_len <= sizeof(struct sctp_idata_chunk)) {
4221 /* Some is playing games with us. */
4224 if (chk_len < sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4226 * Not enough data bytes available in the
4229 SCTP_STAT_INCR(sctps_pdrpnedat);
4232 if (offset + sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4233 /* Not enough data in buffer. */
4236 idata_chunk = (struct sctp_idata_chunk *)(cp->data + offset);
4237 memcpy(desc.data_bytes, idata_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4238 desc.tsn_ifany = idata_chunk->dp.tsn;
4239 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4240 SCTP_STAT_INCR(sctps_pdrpmbda);
4243 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4244 SCTP_STAT_INCR(sctps_pdrpmbct);
4247 if (process_chunk_drop(stcb, &desc, net, pktdrp_flags)) {
4248 SCTP_STAT_INCR(sctps_pdrppdbrk);
4252 offset += SCTP_SIZE32(chk_len);
4254 /* Now update any rwnd --- possibly */
4255 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4256 /* From a peer, we get a rwnd report */
4259 SCTP_STAT_INCR(sctps_pdrpfehos);
4261 bottle_bw = ntohl(cp->bottle_bw);
4262 on_queue = ntohl(cp->current_onq);
4263 if (bottle_bw && on_queue) {
4264 /* a rwnd report is in here */
4265 if (bottle_bw > on_queue)
4266 a_rwnd = bottle_bw - on_queue;
4271 stcb->asoc.peers_rwnd = 0;
4273 if (a_rwnd > stcb->asoc.total_flight) {
4274 stcb->asoc.peers_rwnd =
4275 a_rwnd - stcb->asoc.total_flight;
4277 stcb->asoc.peers_rwnd = 0;
4279 if (stcb->asoc.peers_rwnd <
4280 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4281 /* SWS sender side engages */
4282 stcb->asoc.peers_rwnd = 0;
4287 SCTP_STAT_INCR(sctps_pdrpfmbox);
4290 /* now middle boxes in sat networks get a cwnd bump */
4291 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) &&
4292 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4293 (stcb->asoc.sat_network)) {
4295 * This is debatable but for sat networks it makes sense
4296 * Note if a T3 timer has went off, we will prohibit any
4297 * changes to cwnd until we exit the t3 loss recovery.
4299 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4300 net, cp, &bottle_bw, &on_queue);
4305 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4306 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4307 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4308 * length of the complete packet outputs: - length: modified to remaining
4309 * length after control processing - netp: modified to new sctp_nets after
4310 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4311 * bad packet,...) otherwise return the tcb for this packet
4314 __attribute__((noinline))
4316 static struct sctp_tcb *
4317 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4318 struct sockaddr *src, struct sockaddr *dst,
4319 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4320 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4321 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4322 uint32_t vrf_id, uint16_t port)
4324 struct sctp_association *asoc;
4325 struct mbuf *op_err;
4326 char msg[SCTP_DIAG_INFO_LEN];
4328 int num_chunks = 0; /* number of control chunks processed */
4329 uint32_t chk_length, contiguous;
4331 int abort_no_unlock = 0;
4336 * How big should this be, and should it be alloc'd? Lets try the
4337 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4338 * until we get into jumbo grams and such..
4340 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4342 uint32_t auth_offset = 0, auth_len = 0;
4343 int auth_skipped = 0;
4346 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4347 iphlen, *offset, length, (void *)stcb);
4350 SCTP_TCB_LOCK_ASSERT(stcb);
4352 /* validate chunk header length... */
4353 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4354 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4355 ntohs(ch->chunk_length));
4360 * validate the verification tag
4362 vtag_in = ntohl(sh->v_tag);
4364 if (ch->chunk_type == SCTP_INITIATION) {
4365 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4366 ntohs(ch->chunk_length), vtag_in);
4368 /* protocol error- silently discard... */
4369 SCTP_STAT_INCR(sctps_badvtag);
4371 SCTP_TCB_UNLOCK(stcb);
4375 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4377 * If there is no stcb, skip the AUTH chunk and process
4378 * later after a stcb is found (to validate the lookup was
4381 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4383 (inp->auth_supported == 1)) {
4384 /* save this chunk for later processing */
4386 auth_offset = *offset;
4387 auth_len = ntohs(ch->chunk_length);
4389 /* (temporarily) move past this chunk */
4390 *offset += SCTP_SIZE32(auth_len);
4391 if (*offset >= length) {
4392 /* no more data left in the mbuf chain */
4396 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4397 sizeof(struct sctp_chunkhdr), chunk_buf);
4404 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4405 goto process_control_chunks;
4408 * first check if it's an ASCONF with an unknown src addr we
4409 * need to look inside to find the association
4411 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4412 struct sctp_chunkhdr *asconf_ch = ch;
4413 uint32_t asconf_offset = 0, asconf_len = 0;
4415 /* inp's refcount may be reduced */
4416 SCTP_INP_INCR_REF(inp);
4418 asconf_offset = *offset;
4420 asconf_len = ntohs(asconf_ch->chunk_length);
4421 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4423 stcb = sctp_findassociation_ep_asconf(m,
4426 sh, &inp, netp, vrf_id);
4429 asconf_offset += SCTP_SIZE32(asconf_len);
4430 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4431 sizeof(struct sctp_chunkhdr), chunk_buf);
4432 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4435 * reduce inp's refcount if not reduced in
4436 * sctp_findassociation_ep_asconf().
4438 SCTP_INP_DECR_REF(inp);
4441 /* now go back and verify any auth chunk to be sure */
4442 if (auth_skipped && (stcb != NULL)) {
4443 struct sctp_auth_chunk *auth;
4445 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
4446 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, chunk_buf);
4452 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4454 /* auth HMAC failed so dump it */
4458 /* remaining chunks are HMAC checked */
4459 stcb->asoc.authenticated = 1;
4464 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4465 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4467 /* no association, so it's out of the blue... */
4468 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4469 mflowtype, mflowid, inp->fibnum,
4475 /* ABORT and SHUTDOWN can use either v_tag... */
4476 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4477 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4478 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4479 /* Take the T-bit always into account. */
4480 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4481 (vtag_in == asoc->my_vtag)) ||
4482 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4483 (asoc->peer_vtag != htonl(0)) &&
4484 (vtag_in == asoc->peer_vtag))) {
4487 /* drop this packet... */
4488 SCTP_STAT_INCR(sctps_badvtag);
4490 SCTP_TCB_UNLOCK(stcb);
4495 /* for all other chunks, vtag must match */
4496 if (vtag_in != asoc->my_vtag) {
4497 /* invalid vtag... */
4498 SCTPDBG(SCTP_DEBUG_INPUT3,
4499 "invalid vtag: %xh, expect %xh\n",
4500 vtag_in, asoc->my_vtag);
4501 SCTP_STAT_INCR(sctps_badvtag);
4503 SCTP_TCB_UNLOCK(stcb);
4509 } /* end if !SCTP_COOKIE_ECHO */
4511 * process all control chunks...
4513 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4514 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4515 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4516 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
4517 /* implied cookie-ack.. we must have lost the ack */
4518 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4522 process_control_chunks:
4523 while (IS_SCTP_CONTROL(ch)) {
4524 /* validate chunk length */
4525 chk_length = ntohs(ch->chunk_length);
4526 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4527 ch->chunk_type, chk_length);
4528 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4529 if (chk_length < sizeof(*ch) ||
4530 (*offset + (int)chk_length) > length) {
4534 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4536 * INIT and INIT-ACK only gets the init ack "header" portion
4537 * only because we don't have to process the peer's COOKIE.
4538 * All others get a complete chunk.
4540 switch (ch->chunk_type) {
4541 case SCTP_INITIATION:
4542 contiguous = sizeof(struct sctp_init_chunk);
4544 case SCTP_INITIATION_ACK:
4545 contiguous = sizeof(struct sctp_init_ack_chunk);
4548 contiguous = min(chk_length, sizeof(chunk_buf));
4551 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4560 /* Save off the last place we got a control from */
4562 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4564 * allow last_control to be NULL if
4565 * ASCONF... ASCONF processing will find the
4568 if ((netp != NULL) && (*netp != NULL))
4569 stcb->asoc.last_control_chunk_from = *netp;
4572 #ifdef SCTP_AUDITING_ENABLED
4573 sctp_audit_log(0xB0, ch->chunk_type);
4576 /* check to see if this chunk required auth, but isn't */
4577 if ((stcb != NULL) &&
4578 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4579 !stcb->asoc.authenticated) {
4580 /* "silently" ignore */
4581 SCTP_STAT_INCR(sctps_recvauthmissing);
4584 switch (ch->chunk_type) {
4585 case SCTP_INITIATION:
4586 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4587 /* The INIT chunk must be the only chunk. */
4588 if ((num_chunks > 1) ||
4589 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4591 * RFC 4960bis requires stopping the
4592 * processing of the packet.
4597 /* Honor our resource limit. */
4598 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4599 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4600 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
4601 mflowtype, mflowid, inp->fibnum,
4605 SCTP_TCB_UNLOCK(stcb);
4609 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4610 (struct sctp_init_chunk *)ch, inp,
4616 SCTP_TCB_UNLOCK(stcb);
4620 case SCTP_PAD_CHUNK:
4622 case SCTP_INITIATION_ACK:
4623 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT_ACK\n");
4624 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4625 /* We are not interested anymore */
4626 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size)) {
4631 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4632 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4637 /* The INIT-ACK chunk must be the only chunk. */
4638 if ((num_chunks > 1) ||
4639 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4643 if ((netp != NULL) && (*netp != NULL)) {
4644 ret = sctp_handle_init_ack(m, iphlen, *offset,
4646 (struct sctp_init_ack_chunk *)ch,
4655 if (abort_no_unlock) {
4659 * Special case, I must call the output routine to
4660 * get the cookie echoed
4662 if ((stcb != NULL) && (ret == 0)) {
4663 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4667 case SCTP_SELECTIVE_ACK:
4668 case SCTP_NR_SELECTIVE_ACK:
4671 uint32_t a_rwnd, cum_ack;
4672 uint16_t num_seg, num_nr_seg, num_dup;
4674 int offset_seg, offset_dup;
4676 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
4677 ch->chunk_type == SCTP_SELECTIVE_ACK ? "SCTP_SACK" : "SCTP_NR_SACK");
4678 SCTP_STAT_INCR(sctps_recvsacks);
4680 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing %s chunk\n",
4681 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK");
4684 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4685 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4686 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4690 if (stcb->asoc.nrsack_supported == 0) {
4693 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4694 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR_SACK chunk, too small\n");
4698 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4700 * If we have sent a shutdown-ack, we will pay no
4701 * attention to a sack sent in to us since
4702 * we don't care anymore.
4706 flags = ch->chunk_flags;
4707 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4708 struct sctp_sack_chunk *sack;
4710 sack = (struct sctp_sack_chunk *)ch;
4711 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4712 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4714 num_dup = ntohs(sack->sack.num_dup_tsns);
4715 a_rwnd = ntohl(sack->sack.a_rwnd);
4716 if (sizeof(struct sctp_sack_chunk) +
4717 num_seg * sizeof(struct sctp_gap_ack_block) +
4718 num_dup * sizeof(uint32_t) != chk_length) {
4719 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4722 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4723 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4725 struct sctp_nr_sack_chunk *nr_sack;
4727 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4728 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4729 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4730 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4731 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4732 a_rwnd = ntohl(nr_sack->nr_sack.a_rwnd);
4733 if (sizeof(struct sctp_nr_sack_chunk) +
4734 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4735 num_dup * sizeof(uint32_t) != chk_length) {
4736 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
4739 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
4740 offset_dup = offset_seg + (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block);
4742 SCTPDBG(SCTP_DEBUG_INPUT3, "%s process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4743 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK",
4744 cum_ack, num_seg, a_rwnd);
4745 stcb->asoc.seen_a_sack_this_pkt = 1;
4746 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4747 (num_seg == 0) && (num_nr_seg == 0) &&
4748 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4749 (stcb->asoc.saw_sack_with_frags == 0) &&
4750 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4751 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
4753 * We have a SIMPLE sack having no
4754 * prior segments and data on sent
4755 * queue to be acked. Use the faster
4756 * path sack processing. We also
4757 * allow window update sacks with no
4758 * missing segments to go this way
4761 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
4762 &abort_now, ecne_seen);
4764 if ((netp != NULL) && (*netp != NULL)) {
4765 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
4766 num_seg, num_nr_seg, num_dup, &abort_now, flags,
4767 cum_ack, a_rwnd, ecne_seen);
4771 /* ABORT signal from sack processing */
4775 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
4776 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
4777 (stcb->asoc.stream_queue_cnt == 0)) {
4778 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
4782 case SCTP_HEARTBEAT_REQUEST:
4783 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
4784 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4785 SCTP_STAT_INCR(sctps_recvheartbeat);
4786 sctp_send_heartbeat_ack(stcb, m, *offset,
4790 case SCTP_HEARTBEAT_ACK:
4791 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT_ACK\n");
4792 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
4796 SCTP_STAT_INCR(sctps_recvheartbeatack);
4797 if ((netp != NULL) && (*netp != NULL)) {
4798 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
4802 case SCTP_ABORT_ASSOCIATION:
4803 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
4806 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4807 if (sctp_handle_abort((struct sctp_abort_chunk *)ch, stcb, *netp)) {
4817 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
4819 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
4822 if ((netp != NULL) && (*netp != NULL)) {
4824 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
4825 stcb, *netp, &abort_flag);
4832 case SCTP_SHUTDOWN_ACK:
4833 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_ACK, stcb %p\n", (void *)stcb);
4834 if ((chk_length == sizeof(struct sctp_shutdown_ack_chunk)) &&
4835 (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4836 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
4841 case SCTP_OPERATION_ERROR:
4842 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP_ERR\n");
4843 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL) &&
4844 sctp_handle_error(ch, stcb, *netp, contiguous) < 0) {
4849 case SCTP_COOKIE_ECHO:
4850 SCTPDBG(SCTP_DEBUG_INPUT3,
4851 "SCTP_COOKIE_ECHO, stcb %p\n", (void *)stcb);
4852 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size > 0)) {
4855 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4856 /* We are not interested anymore */
4859 SCTP_TCB_UNLOCK(stcb);
4866 * First are we accepting? We do this again here
4867 * since it is possible that a previous endpoint WAS
4868 * listening responded to a INIT-ACK and then
4869 * closed. We opened and bound.. and are now no
4872 * XXXGL: notes on checking listen queue length.
4873 * 1) SCTP_IS_LISTENING() doesn't necessarily mean
4874 * SOLISTENING(), because a listening "UDP type"
4875 * socket isn't listening in terms of the socket
4876 * layer. It is a normal data flow socket, that
4877 * can fork off new connections. Thus, we should
4878 * look into sol_qlen only in case we are !UDP.
4879 * 2) Checking sol_qlen in general requires locking
4880 * the socket, and this code lacks that.
4882 if ((stcb == NULL) &&
4883 (!SCTP_IS_LISTENING(inp) ||
4884 (((inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) == 0) &&
4885 inp->sctp_socket->sol_qlen >= inp->sctp_socket->sol_qlimit))) {
4886 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
4887 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
4888 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4889 sctp_abort_association(inp, stcb, m, iphlen,
4890 src, dst, sh, op_err,
4897 struct mbuf *ret_buf;
4898 struct sctp_inpcb *linp;
4899 struct sctp_tmit_chunk *chk;
4901 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
4902 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4913 SCTP_ASOC_CREATE_LOCK(linp);
4917 struct sctp_tcb *locked_stcb;
4921 sctp_handle_cookie_echo(m, iphlen,
4925 (struct sctp_cookie_echo_chunk *)ch,
4935 if ((locked_stcb != NULL) && (locked_stcb != stcb)) {
4936 SCTP_TCB_UNLOCK(locked_stcb);
4939 SCTP_TCB_LOCK_ASSERT(stcb);
4945 SCTP_ASOC_CREATE_UNLOCK(linp);
4947 if (ret_buf == NULL) {
4949 SCTP_TCB_UNLOCK(stcb);
4951 SCTPDBG(SCTP_DEBUG_INPUT3,
4952 "GAK, null buffer\n");
4956 /* if AUTH skipped, see if it verified... */
4961 /* Restart the timer if we have pending data */
4962 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
4963 if (chk->whoTo != NULL) {
4968 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
4972 case SCTP_COOKIE_ACK:
4973 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE_ACK, stcb %p\n", (void *)stcb);
4974 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
4977 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4978 /* We are not interested anymore */
4979 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
4982 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4983 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
4988 if ((netp != NULL) && (*netp != NULL)) {
4989 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
4993 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_ECHO\n");
4997 if (stcb->asoc.ecn_supported == 0) {
5000 if ((chk_length != sizeof(struct sctp_ecne_chunk)) &&
5001 (chk_length != sizeof(struct old_sctp_ecne_chunk))) {
5004 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, stcb);
5008 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_CWR\n");
5012 if (stcb->asoc.ecn_supported == 0) {
5015 if (chk_length != sizeof(struct sctp_cwr_chunk)) {
5018 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5020 case SCTP_SHUTDOWN_COMPLETE:
5021 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_COMPLETE, stcb %p\n", (void *)stcb);
5022 /* must be first and only chunk */
5023 if ((num_chunks > 1) ||
5024 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5028 if ((chk_length == sizeof(struct sctp_shutdown_complete_chunk)) &&
5029 (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5030 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5037 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5039 if (stcb->asoc.asconf_supported == 0) {
5042 sctp_handle_asconf(m, *offset, src,
5043 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5047 case SCTP_ASCONF_ACK:
5048 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF_ACK\n");
5052 if (stcb->asoc.asconf_supported == 0) {
5055 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5058 if ((netp != NULL) && (*netp != NULL)) {
5059 /* He's alive so give him credit */
5060 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5061 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5062 stcb->asoc.overall_error_count,
5064 SCTP_FROM_SCTP_INPUT,
5067 stcb->asoc.overall_error_count = 0;
5068 sctp_handle_asconf_ack(m, *offset,
5069 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5070 if (abort_no_unlock)
5074 case SCTP_FORWARD_CUM_TSN:
5075 case SCTP_IFORWARD_CUM_TSN:
5076 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
5077 ch->chunk_type == SCTP_FORWARD_CUM_TSN ? "FORWARD_TSN" : "I_FORWARD_TSN");
5081 if (stcb->asoc.prsctp_supported == 0) {
5084 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5087 if (((stcb->asoc.idata_supported == 1) && (ch->chunk_type == SCTP_FORWARD_CUM_TSN)) ||
5088 ((stcb->asoc.idata_supported == 0) && (ch->chunk_type == SCTP_IFORWARD_CUM_TSN))) {
5089 if (ch->chunk_type == SCTP_FORWARD_CUM_TSN) {
5090 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "FORWARD-TSN chunk received when I-FORWARD-TSN was negotiated");
5092 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "I-FORWARD-TSN chunk received when FORWARD-TSN was negotiated");
5094 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
5095 sctp_abort_an_association(inp, stcb, op_err, false, SCTP_SO_NOT_LOCKED);
5100 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5101 /* We are not interested anymore */
5102 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5103 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5108 * For sending a SACK this looks like DATA chunks.
5110 stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
5112 sctp_handle_forward_tsn(stcb,
5113 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5119 case SCTP_STREAM_RESET:
5120 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5124 if (stcb->asoc.reconfig_supported == 0) {
5127 if (chk_length < sizeof(struct sctp_stream_reset_tsn_req)) {
5130 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5131 /* stop processing */
5136 case SCTP_PACKET_DROPPED:
5137 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5141 if (stcb->asoc.pktdrop_supported == 0) {
5144 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5147 if ((netp != NULL) && (*netp != NULL)) {
5148 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5150 min(chk_length, contiguous));
5153 case SCTP_AUTHENTICATION:
5154 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5156 /* save the first AUTH for later processing */
5157 if (auth_skipped == 0) {
5158 auth_offset = *offset;
5159 auth_len = chk_length;
5162 /* skip this chunk (temporarily) */
5165 if (stcb->asoc.auth_supported == 0) {
5168 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5169 (chk_length > (sizeof(struct sctp_auth_chunk) +
5170 SCTP_AUTH_DIGEST_LEN_MAX))) {
5175 if (got_auth == 1) {
5176 /* skip this chunk... it's already auth'd */
5180 if (sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch, m, *offset)) {
5181 /* auth HMAC failed so dump the packet */
5185 /* remaining chunks are HMAC checked */
5186 stcb->asoc.authenticated = 1;
5192 /* it's an unknown chunk! */
5193 if ((ch->chunk_type & 0x40) &&
5195 (SCTP_GET_STATE(stcb) != SCTP_STATE_EMPTY) &&
5196 (SCTP_GET_STATE(stcb) != SCTP_STATE_INUSE) &&
5197 (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
5198 struct sctp_gen_error_cause *cause;
5201 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
5202 0, M_NOWAIT, 1, MT_DATA);
5203 if (op_err != NULL) {
5204 len = min(SCTP_SIZE32(chk_length), (uint32_t)(length - *offset));
5205 cause = mtod(op_err, struct sctp_gen_error_cause *);
5206 cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5207 cause->length = htons((uint16_t)(len + sizeof(struct sctp_gen_error_cause)));
5208 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5209 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5210 if (SCTP_BUF_NEXT(op_err) != NULL) {
5211 #ifdef SCTP_MBUF_LOGGING
5212 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5213 sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
5216 sctp_queue_op_err(stcb, op_err);
5218 sctp_m_freem(op_err);
5222 if ((ch->chunk_type & 0x80) == 0) {
5223 /* discard this packet */
5226 } /* else skip this bad chunk and continue... */
5228 } /* switch (ch->chunk_type) */
5231 /* get the next chunk */
5232 *offset += SCTP_SIZE32(chk_length);
5233 if (*offset >= length) {
5234 /* no more data left in the mbuf chain */
5237 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5238 sizeof(struct sctp_chunkhdr), chunk_buf);
5245 if ((asconf_cnt > 0) && (stcb != NULL)) {
5246 sctp_send_asconf_ack(stcb);
5252 * common input chunk processing (v4 and v6)
5255 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5256 struct sockaddr *src, struct sockaddr *dst,
5257 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5258 uint8_t compute_crc,
5260 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5261 uint32_t vrf_id, uint16_t port)
5264 int fwd_tsn_seen = 0, data_processed = 0;
5265 struct mbuf *m = *mm, *op_err;
5266 char msg[SCTP_DIAG_INFO_LEN];
5268 int cnt_ctrl_ready = 0;
5269 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5270 struct sctp_tcb *stcb = NULL;
5271 struct sctp_nets *net = NULL;
5273 SCTP_STAT_INCR(sctps_recvdatagrams);
5274 #ifdef SCTP_AUDITING_ENABLED
5275 sctp_audit_log(0xE0, 1);
5276 sctp_auditing(0, inp, stcb, net);
5278 if (compute_crc != 0) {
5279 uint32_t check, calc_check;
5281 check = sh->checksum;
5283 calc_check = sctp_calculate_cksum(m, iphlen);
5284 sh->checksum = check;
5285 if (calc_check != check) {
5286 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5287 calc_check, check, (void *)m, length, iphlen);
5288 stcb = sctp_findassociation_addr(m, offset, src, dst,
5289 sh, ch, &inp, &net, vrf_id);
5290 #if defined(INET) || defined(INET6)
5291 if ((ch->chunk_type != SCTP_INITIATION) &&
5292 (net != NULL) && (net->port != port)) {
5293 if (net->port == 0) {
5294 /* UDP encapsulation turned on. */
5295 net->mtu -= sizeof(struct udphdr);
5296 if (stcb->asoc.smallest_mtu > net->mtu) {
5297 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5299 } else if (port == 0) {
5300 /* UDP encapsulation turned off. */
5301 net->mtu += sizeof(struct udphdr);
5302 /* XXX Update smallest_mtu */
5308 net->flowtype = mflowtype;
5309 net->flowid = mflowid;
5311 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5312 if ((inp != NULL) && (stcb != NULL)) {
5313 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5314 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5315 } else if ((inp != NULL) && (stcb == NULL)) {
5318 SCTP_STAT_INCR(sctps_badsum);
5319 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5323 /* Destination port of 0 is illegal, based on RFC4960. */
5324 if (sh->dest_port == 0) {
5325 SCTP_STAT_INCR(sctps_hdrops);
5328 stcb = sctp_findassociation_addr(m, offset, src, dst,
5329 sh, ch, &inp, &net, vrf_id);
5330 #if defined(INET) || defined(INET6)
5331 if ((ch->chunk_type != SCTP_INITIATION) &&
5332 (net != NULL) && (net->port != port)) {
5333 if (net->port == 0) {
5334 /* UDP encapsulation turned on. */
5335 net->mtu -= sizeof(struct udphdr);
5336 if (stcb->asoc.smallest_mtu > net->mtu) {
5337 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5339 } else if (port == 0) {
5340 /* UDP encapsulation turned off. */
5341 net->mtu += sizeof(struct udphdr);
5342 /* XXX Update smallest_mtu */
5348 net->flowtype = mflowtype;
5349 net->flowid = mflowid;
5352 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5353 SCTP_STAT_INCR(sctps_noport);
5354 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5357 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5358 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
5359 sctp_send_shutdown_complete2(src, dst, sh,
5360 mflowtype, mflowid, fibnum,
5364 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5365 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
5368 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5369 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5370 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5371 (ch->chunk_type != SCTP_INIT))) {
5372 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5374 sctp_send_abort(m, iphlen, src, dst,
5376 mflowtype, mflowid, fibnum,
5381 } else if (stcb == NULL) {
5384 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5385 (void *)m, iphlen, offset, length, (void *)stcb);
5387 /* always clear this before beginning a packet */
5388 stcb->asoc.authenticated = 0;
5389 stcb->asoc.seen_a_sack_this_pkt = 0;
5390 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5391 (void *)stcb, stcb->asoc.state);
5393 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5394 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5396 * If we hit here, we had a ref count
5397 * up when the assoc was aborted and the
5398 * timer is clearing out the assoc, we should
5399 * NOT respond to any packet.. its OOTB.
5401 SCTP_TCB_UNLOCK(stcb);
5403 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5404 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5405 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5407 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5408 mflowtype, mflowid, inp->fibnum,
5413 if (IS_SCTP_CONTROL(ch)) {
5414 /* process the control portion of the SCTP packet */
5415 /* sa_ignore NO_NULL_CHK */
5416 stcb = sctp_process_control(m, iphlen, &offset, length,
5418 inp, stcb, &net, &fwd_tsn_seen,
5419 mflowtype, mflowid, fibnum,
5423 * This covers us if the cookie-echo was there and
5424 * it changes our INP.
5426 inp = stcb->sctp_ep;
5427 #if defined(INET) || defined(INET6)
5428 if ((ch->chunk_type != SCTP_INITIATION) &&
5429 (net != NULL) && (net->port != port)) {
5430 if (net->port == 0) {
5431 /* UDP encapsulation turned on. */
5432 net->mtu -= sizeof(struct udphdr);
5433 if (stcb->asoc.smallest_mtu > net->mtu) {
5434 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5436 } else if (port == 0) {
5437 /* UDP encapsulation turned off. */
5438 net->mtu += sizeof(struct udphdr);
5439 /* XXX Update smallest_mtu */
5447 * no control chunks, so pre-process DATA chunks (these
5448 * checks are taken care of by control processing)
5452 * if DATA only packet, and auth is required, then punt...
5453 * can't have authenticated without any AUTH (control)
5456 if ((stcb != NULL) &&
5457 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5458 /* "silently" ignore */
5459 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5460 SCTP_STAT_INCR(sctps_recvauthmissing);
5464 /* out of the blue DATA chunk */
5465 SCTP_PROBE5(receive, NULL, NULL, m, NULL, sh);
5466 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5467 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5469 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5470 mflowtype, mflowid, fibnum,
5474 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5475 /* v_tag mismatch! */
5476 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5477 SCTP_STAT_INCR(sctps_badvtag);
5482 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5485 * no valid TCB for this packet, or we found it's a bad
5486 * packet while processing control, or we're done with this
5487 * packet (done or skip rest of data), so we drop it...
5493 * DATA chunk processing
5495 /* plow through the data chunks while length > offset */
5498 * Rest should be DATA only. Check authentication state if AUTH for
5501 if ((length > offset) &&
5503 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5504 !stcb->asoc.authenticated) {
5505 /* "silently" ignore */
5506 SCTP_STAT_INCR(sctps_recvauthmissing);
5507 SCTPDBG(SCTP_DEBUG_AUTH1,
5508 "Data chunk requires AUTH, skipped\n");
5511 if (length > offset) {
5515 * First check to make sure our state is correct. We would
5516 * not get here unless we really did have a tag, so we don't
5517 * abort if this happens, just dump the chunk silently.
5519 switch (SCTP_GET_STATE(stcb)) {
5520 case SCTP_STATE_COOKIE_ECHOED:
5522 * we consider data with valid tags in this state
5523 * shows us the cookie-ack was lost. Imply it was
5526 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5528 case SCTP_STATE_COOKIE_WAIT:
5530 * We consider OOTB any data sent during asoc setup.
5532 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5533 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5535 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5536 mflowtype, mflowid, inp->fibnum,
5539 /* sa_ignore NOTREACHED */
5541 case SCTP_STATE_EMPTY: /* should not happen */
5542 case SCTP_STATE_INUSE: /* should not happen */
5543 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5544 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5547 /* sa_ignore NOTREACHED */
5549 case SCTP_STATE_OPEN:
5550 case SCTP_STATE_SHUTDOWN_SENT:
5553 /* plow through the data chunks while length > offset */
5554 retval = sctp_process_data(mm, iphlen, &offset, length,
5555 inp, stcb, net, &high_tsn);
5558 * The association aborted, NO UNLOCK needed since
5559 * the association is destroyed.
5568 * Anything important needs to have been m_copy'ed in
5573 /* take care of ecn */
5574 if ((data_processed == 1) &&
5575 (stcb->asoc.ecn_supported == 1) &&
5576 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5577 /* Yep, we need to add a ECNE */
5578 sctp_send_ecn_echo(stcb, net, high_tsn);
5581 if ((data_processed == 0) && (fwd_tsn_seen)) {
5583 uint32_t highest_tsn;
5585 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5586 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5588 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5590 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5591 stcb->asoc.send_sack = 1;
5592 sctp_sack_check(stcb, was_a_gap);
5593 } else if (fwd_tsn_seen) {
5594 stcb->asoc.send_sack = 1;
5596 /* trigger send of any chunks in queue... */
5598 #ifdef SCTP_AUDITING_ENABLED
5599 sctp_audit_log(0xE0, 2);
5600 sctp_auditing(1, inp, stcb, net);
5602 SCTPDBG(SCTP_DEBUG_INPUT1,
5603 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5604 stcb->asoc.peers_rwnd,
5605 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5606 stcb->asoc.total_flight);
5607 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5608 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5609 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5611 if (!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue) ||
5613 stcb->asoc.trigger_reset ||
5615 (stcb->asoc.peers_rwnd > 0 || stcb->asoc.total_flight == 0))) {
5616 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5617 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5618 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5620 #ifdef SCTP_AUDITING_ENABLED
5621 sctp_audit_log(0xE0, 3);
5622 sctp_auditing(2, inp, stcb, net);
5626 SCTP_TCB_UNLOCK(stcb);
5628 if (inp_decr != NULL) {
5629 /* reduce ref-count */
5630 SCTP_INP_WLOCK(inp_decr);
5631 SCTP_INP_DECR_REF(inp_decr);
5632 SCTP_INP_WUNLOCK(inp_decr);
5639 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5643 uint32_t vrf_id = 0;
5645 struct sockaddr_in src, dst;
5648 struct sctp_chunkhdr *ch;
5650 uint8_t compute_crc;
5656 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
5657 SCTP_RELEASE_PKT(i_pak);
5660 m = SCTP_HEADER_TO_CHAIN(i_pak);
5661 #ifdef SCTP_MBUF_LOGGING
5662 /* Log in any input mbufs */
5663 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5664 sctp_log_mbc(m, SCTP_MBUF_INPUT);
5667 #ifdef SCTP_PACKET_LOGGING
5668 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
5672 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
5673 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
5675 if_name(m->m_pkthdr.rcvif),
5676 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
5677 mflowid = m->m_pkthdr.flowid;
5678 mflowtype = M_HASHTYPE_GET(m);
5679 fibnum = M_GETFIB(m);
5680 SCTP_STAT_INCR(sctps_recvpackets);
5681 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
5682 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
5683 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5684 if (SCTP_BUF_LEN(m) < offset) {
5685 if ((m = m_pullup(m, offset)) == NULL) {
5686 SCTP_STAT_INCR(sctps_hdrops);
5690 ip = mtod(m, struct ip *);
5691 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
5692 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
5693 offset -= sizeof(struct sctp_chunkhdr);
5694 memset(&src, 0, sizeof(struct sockaddr_in));
5695 src.sin_family = AF_INET;
5696 src.sin_len = sizeof(struct sockaddr_in);
5697 src.sin_port = sh->src_port;
5698 src.sin_addr = ip->ip_src;
5699 memset(&dst, 0, sizeof(struct sockaddr_in));
5700 dst.sin_family = AF_INET;
5701 dst.sin_len = sizeof(struct sockaddr_in);
5702 dst.sin_port = sh->dest_port;
5703 dst.sin_addr = ip->ip_dst;
5704 length = ntohs(ip->ip_len);
5705 /* Validate mbuf chain length with IP payload length. */
5706 if (SCTP_HEADER_LEN(m) != length) {
5707 SCTPDBG(SCTP_DEBUG_INPUT1,
5708 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
5709 SCTP_STAT_INCR(sctps_hdrops);
5712 /* SCTP does not allow broadcasts or multicasts */
5713 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
5716 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
5719 ecn_bits = ip->ip_tos;
5720 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
5721 SCTP_STAT_INCR(sctps_recvhwcrc);
5724 SCTP_STAT_INCR(sctps_recvswcrc);
5727 sctp_common_input_processing(&m, iphlen, offset, length,
5728 (struct sockaddr *)&src,
5729 (struct sockaddr *)&dst,
5733 mflowtype, mflowid, fibnum,
5742 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5743 extern int *sctp_cpuarry;
5747 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
5754 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5760 uint32_t flowid, tag;
5762 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
5763 flowid = m->m_pkthdr.flowid;
5766 * No flow id built by lower layers fix it so we
5769 offset = off + sizeof(struct sctphdr);
5770 if (SCTP_BUF_LEN(m) < offset) {
5771 if ((m = m_pullup(m, offset)) == NULL) {
5772 SCTP_STAT_INCR(sctps_hdrops);
5773 return (IPPROTO_DONE);
5776 ip = mtod(m, struct ip *);
5777 sh = (struct sctphdr *)((caddr_t)ip + off);
5778 tag = htonl(sh->v_tag);
5779 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
5780 m->m_pkthdr.flowid = flowid;
5781 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE_HASH);
5783 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
5784 sctp_queue_to_mcore(m, off, cpu_to_use);
5785 return (IPPROTO_DONE);
5788 sctp_input_with_port(m, off, 0);
5789 return (IPPROTO_DONE);