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)) {
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 stcb->sctp_socket->so_snd.sb_cc = 0;
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 stcb->sctp_ep->sctp_flags |=
1495 SCTP_PCB_FLAGS_CONNECTED;
1496 soisconnected(stcb->sctp_socket);
1498 /* notify upper layer */
1499 *notification = SCTP_NOTIFY_ASSOC_UP;
1501 * since we did not send a HB make sure we don't
1504 old.tv_sec = cookie->time_entered.tv_sec;
1505 old.tv_usec = cookie->time_entered.tv_usec;
1506 net->hb_responded = 1;
1507 sctp_calculate_rto(stcb, asoc, net, &old,
1508 SCTP_RTT_FROM_NON_DATA);
1510 if (stcb->asoc.sctp_autoclose_ticks &&
1511 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
1512 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
1518 * we're in the OPEN state (or beyond), so peer must
1519 * have simply lost the COOKIE-ACK
1523 sctp_stop_all_cookie_timers(stcb);
1524 if ((retval = sctp_load_addresses_from_init(stcb, m,
1525 init_offset + sizeof(struct sctp_init_chunk),
1526 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1527 if (how_indx < sizeof(asoc->cookie_how))
1528 asoc->cookie_how[how_indx] = 4;
1529 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1530 "Problem with address parameters");
1531 SCTPDBG(SCTP_DEBUG_INPUT1,
1532 "Load addresses from INIT causes an abort %d\n",
1534 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1535 src, dst, sh, op_err,
1540 /* respond with a COOKIE-ACK */
1541 sctp_toss_old_cookies(stcb, asoc);
1542 sctp_send_cookie_ack(stcb);
1543 if (how_indx < sizeof(asoc->cookie_how))
1544 asoc->cookie_how[how_indx] = 5;
1548 if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1549 ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
1550 cookie->tie_tag_my_vtag == 0 &&
1551 cookie->tie_tag_peer_vtag == 0) {
1553 * case C in Section 5.2.4 Table 2: XMOO silently discard
1555 if (how_indx < sizeof(asoc->cookie_how))
1556 asoc->cookie_how[how_indx] = 6;
1557 SCTP_TCB_UNLOCK(stcb);
1561 * If nat support, and the below and stcb is established, send back
1562 * a ABORT(colliding state) if we are established.
1564 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) &&
1565 (asoc->peer_supports_nat) &&
1566 ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1567 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1568 (asoc->peer_vtag == 0)))) {
1570 * Special case - Peer's support nat. We may have two init's
1571 * that we gave out the same tag on since one was not
1572 * established.. i.e. we get INIT from host-1 behind the nat
1573 * and we respond tag-a, we get a INIT from host-2 behind
1574 * the nat and we get tag-a again. Then we bring up host-1
1575 * (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
1576 * Now we have colliding state. We must send an abort here
1577 * with colliding state indication.
1579 op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
1580 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
1581 mflowtype, mflowid, inp->fibnum,
1583 SCTP_TCB_UNLOCK(stcb);
1586 if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
1587 ((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
1588 (asoc->peer_vtag == 0))) {
1590 * case B in Section 5.2.4 Table 2: MXAA or MOAA my info
1591 * should be ok, re-accept peer info
1593 if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
1595 * Extension of case C. If we hit this, then the
1596 * random number generator returned the same vtag
1597 * when we first sent our INIT-ACK and when we later
1598 * sent our INIT. The side with the seq numbers that
1599 * are different will be the one that normnally
1600 * would have hit case C. This in effect "extends"
1601 * our vtags in this collision case to be 64 bits.
1602 * The same collision could occur aka you get both
1603 * vtag and seq number the same twice in a row.. but
1604 * is much less likely. If it did happen then we
1605 * would proceed through and bring up the assoc.. we
1606 * may end up with the wrong stream setup however..
1607 * which would be bad.. but there is no way to
1608 * tell.. until we send on a stream that does not
1611 if (how_indx < sizeof(asoc->cookie_how))
1612 asoc->cookie_how[how_indx] = 7;
1614 SCTP_TCB_UNLOCK(stcb);
1617 if (how_indx < sizeof(asoc->cookie_how))
1618 asoc->cookie_how[how_indx] = 8;
1619 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
1620 SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
1621 sctp_stop_all_cookie_timers(stcb);
1623 * since we did not send a HB make sure we don't double
1626 net->hb_responded = 1;
1627 if (stcb->asoc.sctp_autoclose_ticks &&
1628 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
1629 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
1632 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1633 if (asoc->pre_open_streams < asoc->streamoutcnt) {
1634 asoc->pre_open_streams = asoc->streamoutcnt;
1637 if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
1639 * Ok the peer probably discarded our data (if we
1640 * echoed a cookie+data). So anything on the
1641 * sent_queue should be marked for retransmit, we
1642 * may not get something to kick us so it COULD
1643 * still take a timeout to move these.. but it can't
1644 * hurt to mark them.
1647 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
1648 if (chk->sent < SCTP_DATAGRAM_RESEND) {
1649 chk->sent = SCTP_DATAGRAM_RESEND;
1650 sctp_flight_size_decrease(chk);
1651 sctp_total_flight_decrease(stcb, chk);
1652 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
1657 /* process the INIT info (peer's info) */
1658 if (sctp_process_init(init_cp, stcb) < 0) {
1659 if (how_indx < sizeof(asoc->cookie_how))
1660 asoc->cookie_how[how_indx] = 9;
1661 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1662 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1663 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1664 src, dst, sh, op_err,
1669 if ((retval = sctp_load_addresses_from_init(stcb, m,
1670 init_offset + sizeof(struct sctp_init_chunk),
1671 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1672 if (how_indx < sizeof(asoc->cookie_how))
1673 asoc->cookie_how[how_indx] = 10;
1674 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1675 "Problem with address parameters");
1676 SCTPDBG(SCTP_DEBUG_INPUT1,
1677 "Load addresses from INIT causes an abort %d\n",
1679 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1680 src, dst, sh, op_err,
1685 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
1686 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
1687 *notification = SCTP_NOTIFY_ASSOC_UP;
1689 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1690 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
1691 (!SCTP_IS_LISTENING(inp))) {
1692 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
1693 soisconnected(stcb->sctp_socket);
1695 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)
1696 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
1698 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1699 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1700 } else if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1701 SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
1703 SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
1705 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1706 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1707 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1708 stcb->sctp_ep, stcb, NULL);
1710 sctp_stop_all_cookie_timers(stcb);
1711 sctp_toss_old_cookies(stcb, asoc);
1712 sctp_send_cookie_ack(stcb);
1715 * only if we have retrans set do we do this. What
1716 * this call does is get only the COOKIE-ACK out and
1717 * then when we return the normal call to
1718 * sctp_chunk_output will get the retrans out behind
1721 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
1723 if (how_indx < sizeof(asoc->cookie_how))
1724 asoc->cookie_how[how_indx] = 11;
1728 if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
1729 ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
1730 cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
1731 cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
1732 cookie->tie_tag_peer_vtag != 0) {
1733 struct sctpasochead *head;
1735 if (asoc->peer_supports_nat) {
1736 struct sctp_tcb *local_stcb;
1739 * This is a gross gross hack. Just call the
1740 * cookie_new code since we are allowing a duplicate
1741 * association. I hope this works...
1743 local_stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst,
1744 sh, cookie, cookie_len,
1745 inp, netp, init_src, notification,
1746 auth_skipped, auth_offset, auth_len,
1749 if (local_stcb == NULL) {
1750 SCTP_TCB_UNLOCK(stcb);
1752 return (local_stcb);
1755 * case A in Section 5.2.4 Table 2: XXMM (peer restarted)
1758 if (how_indx < sizeof(asoc->cookie_how))
1759 asoc->cookie_how[how_indx] = 12;
1760 sctp_stop_association_timers(stcb, false);
1761 /* notify upper layer */
1762 *notification = SCTP_NOTIFY_ASSOC_RESTART;
1763 atomic_add_int(&stcb->asoc.refcnt, 1);
1764 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_OPEN) &&
1765 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
1766 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT)) {
1767 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
1769 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
1770 SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
1771 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1772 SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
1774 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
1775 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1776 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
1777 stcb->sctp_ep, stcb, NULL);
1779 } else if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) {
1780 /* move to OPEN state, if not in SHUTDOWN_SENT */
1781 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
1783 if (asoc->pre_open_streams < asoc->streamoutcnt) {
1784 asoc->pre_open_streams = asoc->streamoutcnt;
1786 asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
1787 asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
1788 asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
1789 asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
1790 asoc->str_reset_seq_in = asoc->init_seq_number;
1791 asoc->advanced_peer_ack_point = asoc->last_acked_seq;
1792 asoc->send_sack = 1;
1793 asoc->data_pkts_seen = 0;
1794 asoc->last_data_chunk_from = NULL;
1795 asoc->last_control_chunk_from = NULL;
1796 asoc->last_net_cmt_send_started = NULL;
1797 if (asoc->mapping_array) {
1798 memset(asoc->mapping_array, 0,
1799 asoc->mapping_array_size);
1801 if (asoc->nr_mapping_array) {
1802 memset(asoc->nr_mapping_array, 0,
1803 asoc->mapping_array_size);
1805 SCTP_TCB_UNLOCK(stcb);
1806 SCTP_INP_INFO_WLOCK();
1807 SCTP_INP_WLOCK(stcb->sctp_ep);
1808 SCTP_TCB_LOCK(stcb);
1809 atomic_subtract_int(&stcb->asoc.refcnt, 1);
1810 /* send up all the data */
1811 sctp_report_all_outbound(stcb, 0, SCTP_SO_LOCKED);
1812 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
1813 stcb->asoc.strmout[i].chunks_on_queues = 0;
1814 #if defined(SCTP_DETAILED_STR_STATS)
1815 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
1816 asoc->strmout[i].abandoned_sent[j] = 0;
1817 asoc->strmout[i].abandoned_unsent[j] = 0;
1820 asoc->strmout[i].abandoned_sent[0] = 0;
1821 asoc->strmout[i].abandoned_unsent[0] = 0;
1823 stcb->asoc.strmout[i].next_mid_ordered = 0;
1824 stcb->asoc.strmout[i].next_mid_unordered = 0;
1825 stcb->asoc.strmout[i].sid = i;
1826 stcb->asoc.strmout[i].last_msg_incomplete = 0;
1828 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
1829 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
1830 SCTP_FREE(strrst, SCTP_M_STRESET);
1832 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
1833 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
1835 sctp_m_freem(sq->data);
1838 sctp_free_remote_addr(sq->whoFrom);
1841 sctp_free_a_readq(stcb, sq);
1843 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
1844 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
1846 sctp_m_freem(chk->data);
1849 if (chk->holds_key_ref)
1850 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
1851 sctp_free_remote_addr(chk->whoTo);
1852 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
1853 SCTP_DECR_CHK_COUNT();
1855 asoc->ctrl_queue_cnt = 0;
1856 asoc->str_reset = NULL;
1857 asoc->stream_reset_outstanding = 0;
1858 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
1859 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
1861 sctp_m_freem(chk->data);
1864 if (chk->holds_key_ref)
1865 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
1866 sctp_free_remote_addr(chk->whoTo);
1867 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
1868 SCTP_DECR_CHK_COUNT();
1870 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
1871 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
1872 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
1874 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
1875 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
1876 if (aack->data != NULL) {
1877 sctp_m_freem(aack->data);
1879 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
1882 /* process the INIT-ACK info (my info) */
1883 asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
1884 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
1886 /* pull from vtag hash */
1887 LIST_REMOVE(stcb, sctp_asocs);
1888 /* re-insert to new vtag position */
1889 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
1890 SCTP_BASE_INFO(hashasocmark))];
1892 * put it in the bucket in the vtag hash of assoc's for the
1895 LIST_INSERT_HEAD(head, stcb, sctp_asocs);
1897 SCTP_INP_WUNLOCK(stcb->sctp_ep);
1898 SCTP_INP_INFO_WUNLOCK();
1899 asoc->total_flight = 0;
1900 asoc->total_flight_count = 0;
1901 /* process the INIT info (peer's info) */
1902 if (sctp_process_init(init_cp, stcb) < 0) {
1903 if (how_indx < sizeof(asoc->cookie_how))
1904 asoc->cookie_how[how_indx] = 13;
1905 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
1906 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_init() failed\n");
1907 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1908 src, dst, sh, op_err,
1914 * since we did not send a HB make sure we don't double
1917 net->hb_responded = 1;
1919 if ((retval = sctp_load_addresses_from_init(stcb, m,
1920 init_offset + sizeof(struct sctp_init_chunk),
1921 initack_offset, src, dst, init_src, stcb->asoc.port)) < 0) {
1922 if (how_indx < sizeof(asoc->cookie_how))
1923 asoc->cookie_how[how_indx] = 14;
1924 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
1925 "Problem with address parameters");
1926 SCTPDBG(SCTP_DEBUG_INPUT1,
1927 "Load addresses from INIT causes an abort %d\n",
1929 sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
1930 src, dst, sh, op_err,
1935 /* respond with a COOKIE-ACK */
1936 sctp_send_cookie_ack(stcb);
1937 if (how_indx < sizeof(asoc->cookie_how))
1938 asoc->cookie_how[how_indx] = 15;
1939 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE) &&
1940 (asoc->sctp_autoclose_ticks > 0)) {
1941 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
1945 if (how_indx < sizeof(asoc->cookie_how))
1946 asoc->cookie_how[how_indx] = 16;
1947 /* all other cases... */
1948 SCTP_TCB_UNLOCK(stcb);
1953 * handle a state cookie for a new association m: input packet mbuf chain--
1954 * assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
1955 * and the cookie signature does not exist offset: offset into mbuf to the
1956 * cookie-echo chunk length: length of the cookie chunk to: where the init
1957 * was from returns a new TCB
1959 static struct sctp_tcb *
1960 sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
1961 struct sockaddr *src, struct sockaddr *dst,
1962 struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
1963 struct sctp_inpcb *inp, struct sctp_nets **netp,
1964 struct sockaddr *init_src, int *notification,
1965 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
1966 uint8_t mflowtype, uint32_t mflowid,
1967 uint32_t vrf_id, uint16_t port)
1969 struct sctp_tcb *stcb;
1970 struct sctp_init_chunk *init_cp, init_buf;
1971 struct sctp_init_ack_chunk *initack_cp, initack_buf;
1972 union sctp_sockstore store;
1973 struct sctp_association *asoc;
1974 int init_offset, initack_offset, initack_limit;
1976 uint8_t auth_chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
1979 * find and validate the INIT chunk in the cookie (peer's info) the
1980 * INIT should start after the cookie-echo header struct (chunk
1981 * header, state cookie header struct)
1983 init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
1984 init_cp = (struct sctp_init_chunk *)
1985 sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
1986 (uint8_t *)&init_buf);
1987 if (init_cp == NULL) {
1988 /* could not pull a INIT chunk in cookie */
1989 SCTPDBG(SCTP_DEBUG_INPUT1,
1990 "process_cookie_new: could not pull INIT chunk hdr\n");
1993 if (init_cp->ch.chunk_type != SCTP_INITIATION) {
1994 SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
1997 initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
1999 * find and validate the INIT-ACK chunk in the cookie (my info) the
2000 * INIT-ACK follows the INIT chunk
2002 initack_cp = (struct sctp_init_ack_chunk *)
2003 sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
2004 (uint8_t *)&initack_buf);
2005 if (initack_cp == NULL) {
2006 /* could not pull INIT-ACK chunk in cookie */
2007 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
2010 if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
2014 * NOTE: We can't use the INIT_ACK's chk_length to determine the
2015 * "initack_limit" value. This is because the chk_length field
2016 * includes the length of the cookie, but the cookie is omitted when
2017 * the INIT and INIT_ACK are tacked onto the cookie...
2019 initack_limit = offset + cookie_len;
2022 * now that we know the INIT/INIT-ACK are in place, create a new TCB
2027 * Here we do a trick, we set in NULL for the proc/thread argument.
2028 * We do this since in effect we only use the p argument when the
2029 * socket is unbound and we must do an implicit bind. Since we are
2030 * getting a cookie, we cannot be unbound.
2032 stcb = sctp_aloc_assoc(inp, init_src, &error,
2033 ntohl(initack_cp->init.initiate_tag),
2034 ntohl(initack_cp->init.initial_tsn), vrf_id,
2035 ntohs(initack_cp->init.num_outbound_streams),
2037 (struct thread *)NULL,
2038 SCTP_DONT_INITIALIZE_AUTH_PARAMS);
2040 struct mbuf *op_err;
2042 /* memory problem? */
2043 SCTPDBG(SCTP_DEBUG_INPUT1,
2044 "process_cookie_new: no room for another TCB!\n");
2045 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2046 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2047 src, dst, sh, op_err,
2053 /* get scope variables out of cookie */
2054 asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
2055 asoc->scope.site_scope = cookie->site_scope;
2056 asoc->scope.local_scope = cookie->local_scope;
2057 asoc->scope.loopback_scope = cookie->loopback_scope;
2059 if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
2060 (asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
2061 struct mbuf *op_err;
2064 * Houston we have a problem. The EP changed while the
2065 * cookie was in flight. Only recourse is to abort the
2068 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2069 sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
2070 src, dst, sh, op_err,
2073 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2074 SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
2077 /* process the INIT-ACK info (my info) */
2078 asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
2080 /* process the INIT info (peer's info) */
2081 if (sctp_process_init(init_cp, stcb) < 0) {
2082 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2083 SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
2086 /* load all addresses */
2087 if (sctp_load_addresses_from_init(stcb, m,
2088 init_offset + sizeof(struct sctp_init_chunk),
2089 initack_offset, src, dst, init_src, port) < 0) {
2090 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2091 SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
2095 * verify any preceding AUTH chunk that was skipped
2097 /* pull the local authentication parameters from the cookie/init-ack */
2098 sctp_auth_get_cookie_params(stcb, m,
2099 initack_offset + sizeof(struct sctp_init_ack_chunk),
2100 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
2102 struct sctp_auth_chunk *auth;
2104 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
2105 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
2109 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
2110 /* auth HMAC failed, dump the assoc and packet */
2111 SCTPDBG(SCTP_DEBUG_AUTH1,
2112 "COOKIE-ECHO: AUTH failed\n");
2113 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2114 SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
2117 /* remaining chunks checked... good to go */
2118 stcb->asoc.authenticated = 1;
2123 * if we're doing ASCONFs, check to see if we have any new local
2124 * addresses that need to get added to the peer (eg. addresses
2125 * changed while cookie echo in flight). This needs to be done
2126 * after we go to the OPEN state to do the correct asconf
2127 * processing. else, make sure we have the correct addresses in our
2131 /* warning, we re-use sin, sin6, sa_store here! */
2132 /* pull in local_address (our "from" address) */
2133 switch (cookie->laddr_type) {
2135 case SCTP_IPV4_ADDRESS:
2136 /* source addr is IPv4 */
2137 memset(&store.sin, 0, sizeof(struct sockaddr_in));
2138 store.sin.sin_family = AF_INET;
2139 store.sin.sin_len = sizeof(struct sockaddr_in);
2140 store.sin.sin_addr.s_addr = cookie->laddress[0];
2144 case SCTP_IPV6_ADDRESS:
2145 /* source addr is IPv6 */
2146 memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
2147 store.sin6.sin6_family = AF_INET6;
2148 store.sin6.sin6_len = sizeof(struct sockaddr_in6);
2149 store.sin6.sin6_scope_id = cookie->scope_id;
2150 memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
2154 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
2155 SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
2159 /* update current state */
2160 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2161 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2162 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2163 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2164 stcb->sctp_ep, stcb, NULL);
2166 sctp_stop_all_cookie_timers(stcb);
2167 SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
2168 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2170 /* set up to notify upper layer */
2171 *notification = SCTP_NOTIFY_ASSOC_UP;
2172 if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2173 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
2174 (!SCTP_IS_LISTENING(inp))) {
2176 * This is an endpoint that called connect() how it got a
2177 * cookie that is NEW is a bit of a mystery. It must be that
2178 * the INIT was sent, but before it got there.. a complete
2179 * INIT/INIT-ACK/COOKIE arrived. But of course then it
2180 * should have went to the other code.. not here.. oh well..
2181 * a bit of protection is worth having..
2185 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2186 soisconnected(stcb->sctp_socket);
2187 } else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
2188 (SCTP_IS_LISTENING(inp))) {
2190 * We don't want to do anything with this one. Since it is
2191 * the listening guy. The timer will get started for
2192 * accepted connections in the caller.
2196 if (stcb->asoc.sctp_autoclose_ticks &&
2197 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2198 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
2200 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
2201 *netp = sctp_findnet(stcb, init_src);
2202 if (*netp != NULL) {
2206 * Since we did not send a HB, make sure we don't double
2209 (*netp)->hb_responded = 1;
2210 /* Calculate the RTT. */
2211 old.tv_sec = cookie->time_entered.tv_sec;
2212 old.tv_usec = cookie->time_entered.tv_usec;
2213 sctp_calculate_rto(stcb, asoc, *netp, &old, SCTP_RTT_FROM_NON_DATA);
2215 /* respond with a COOKIE-ACK */
2216 sctp_send_cookie_ack(stcb);
2219 * check the address lists for any ASCONFs that need to be sent
2220 * AFTER the cookie-ack is sent
2222 sctp_check_address_list(stcb, m,
2223 initack_offset + sizeof(struct sctp_init_ack_chunk),
2224 initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
2225 &store.sa, cookie->local_scope, cookie->site_scope,
2226 cookie->ipv4_scope, cookie->loopback_scope);
2232 * CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
2233 * we NEED to make sure we are not already using the vtag. If so we
2234 * need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
2235 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
2236 SCTP_BASE_INFO(hashasocmark))];
2237 LIST_FOREACH(stcb, head, sctp_asocs) {
2238 if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
2239 -- SEND ABORT - TRY AGAIN --
2245 * handles a COOKIE-ECHO message stcb: modified to either a new or left as
2246 * existing (non-NULL) TCB
2248 static struct mbuf *
2249 sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
2250 struct sockaddr *src, struct sockaddr *dst,
2251 struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
2252 struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
2253 int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
2254 struct sctp_tcb **locked_tcb,
2255 uint8_t mflowtype, uint32_t mflowid,
2256 uint32_t vrf_id, uint16_t port)
2258 struct sctp_state_cookie *cookie;
2259 struct sctp_tcb *l_stcb = *stcb;
2260 struct sctp_inpcb *l_inp;
2261 struct sockaddr *to;
2262 struct sctp_pcb *ep;
2264 uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
2266 uint8_t cookie_ok = 0;
2267 unsigned int sig_offset, cookie_offset;
2268 unsigned int cookie_len;
2270 struct timeval time_entered, time_expires;
2271 int notification = 0;
2272 struct sctp_nets *netl;
2273 int had_a_existing_tcb = 0;
2274 int send_int_conf = 0;
2276 struct sockaddr_in sin;
2279 struct sockaddr_in6 sin6;
2282 SCTPDBG(SCTP_DEBUG_INPUT2,
2283 "sctp_handle_cookie: handling COOKIE-ECHO\n");
2285 if (inp_p == NULL) {
2288 cookie = &cp->cookie;
2289 cookie_offset = offset + sizeof(struct sctp_chunkhdr);
2290 cookie_len = ntohs(cp->ch.chunk_length);
2292 if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
2293 sizeof(struct sctp_init_chunk) +
2294 sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
2295 /* cookie too small */
2298 if ((cookie->peerport != sh->src_port) ||
2299 (cookie->myport != sh->dest_port) ||
2300 (cookie->my_vtag != sh->v_tag)) {
2302 * invalid ports or bad tag. Note that we always leave the
2303 * v_tag in the header in network order and when we stored
2304 * it in the my_vtag slot we also left it in network order.
2305 * This maintains the match even though it may be in the
2306 * opposite byte order of the machine :->
2311 * split off the signature into its own mbuf (since it should not be
2312 * calculated in the sctp_hmac_m() call).
2314 sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
2315 m_sig = m_split(m, sig_offset, M_NOWAIT);
2316 if (m_sig == NULL) {
2317 /* out of memory or ?? */
2320 #ifdef SCTP_MBUF_LOGGING
2321 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
2322 sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
2327 * compute the signature/digest for the cookie
2329 ep = &(*inp_p)->sctp_ep;
2332 SCTP_TCB_UNLOCK(l_stcb);
2334 SCTP_INP_RLOCK(l_inp);
2336 SCTP_TCB_LOCK(l_stcb);
2338 /* which cookie is it? */
2339 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2340 (ep->current_secret_number != ep->last_secret_number)) {
2341 /* it's the old cookie */
2342 (void)sctp_hmac_m(SCTP_HMAC,
2343 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2344 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2346 /* it's the current cookie */
2347 (void)sctp_hmac_m(SCTP_HMAC,
2348 (uint8_t *)ep->secret_key[(int)ep->current_secret_number],
2349 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2351 /* get the signature */
2352 SCTP_INP_RUNLOCK(l_inp);
2353 sig = (uint8_t *)sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *)&tmp_sig);
2355 /* couldn't find signature */
2356 sctp_m_freem(m_sig);
2359 /* compare the received digest with the computed digest */
2360 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2361 /* try the old cookie? */
2362 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2363 (ep->current_secret_number != ep->last_secret_number)) {
2364 /* compute digest with old */
2365 (void)sctp_hmac_m(SCTP_HMAC,
2366 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2367 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2369 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2377 * Now before we continue we must reconstruct our mbuf so that
2378 * normal processing of any other chunks will work.
2384 while (SCTP_BUF_NEXT(m_at) != NULL) {
2385 m_at = SCTP_BUF_NEXT(m_at);
2387 SCTP_BUF_NEXT(m_at) = m_sig;
2390 if (cookie_ok == 0) {
2391 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2392 SCTPDBG(SCTP_DEBUG_INPUT2,
2393 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2394 (uint32_t)offset, cookie_offset, sig_offset);
2398 if (sctp_ticks_to_msecs(cookie->cookie_life) > SCTP_MAX_COOKIE_LIFE) {
2399 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: Invalid cookie lifetime\n");
2402 time_entered.tv_sec = cookie->time_entered.tv_sec;
2403 time_entered.tv_usec = cookie->time_entered.tv_usec;
2404 if ((time_entered.tv_sec < 0) ||
2405 (time_entered.tv_usec < 0) ||
2406 (time_entered.tv_usec >= 1000000)) {
2407 /* Invalid time stamp. Cookie must have been modified. */
2408 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: Invalid time stamp\n");
2411 (void)SCTP_GETTIME_TIMEVAL(&now);
2412 if (timevalcmp(&now, &time_entered, <)) {
2413 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie generated in the future!\n");
2417 * Check the cookie timestamps to be sure it's not stale.
2418 * cookie_life is in ticks, so we convert to seconds.
2420 time_expires.tv_sec = time_entered.tv_sec + sctp_ticks_to_secs(cookie->cookie_life);
2421 time_expires.tv_usec = time_entered.tv_usec;
2422 if (timevalcmp(&now, &time_expires, >)) {
2423 /* cookie is stale! */
2424 struct mbuf *op_err;
2425 struct sctp_error_stale_cookie *cause;
2426 struct timeval diff;
2429 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
2430 0, M_NOWAIT, 1, MT_DATA);
2431 if (op_err == NULL) {
2436 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
2437 cause = mtod(op_err, struct sctp_error_stale_cookie *);
2438 cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
2439 cause->cause.length = htons(sizeof(struct sctp_error_stale_cookie));
2441 timevalsub(&diff, &time_expires);
2442 if ((uint32_t)diff.tv_sec > UINT32_MAX / 1000000) {
2443 staleness = UINT32_MAX;
2445 staleness = (uint32_t)diff.tv_sec * 1000000;
2447 if (UINT32_MAX - staleness >= (uint32_t)diff.tv_usec) {
2448 staleness += (uint32_t)diff.tv_usec;
2450 staleness = UINT32_MAX;
2452 cause->stale_time = htonl(staleness);
2453 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2454 mflowtype, mflowid, l_inp->fibnum,
2459 * Now we must see with the lookup address if we have an existing
2460 * asoc. This will only happen if we were in the COOKIE-WAIT state
2461 * and a INIT collided with us and somewhere the peer sent the
2462 * cookie on another address besides the single address our assoc
2463 * had for him. In this case we will have one of the tie-tags set at
2464 * least AND the address field in the cookie can be used to look it
2468 switch (cookie->addr_type) {
2470 case SCTP_IPV6_ADDRESS:
2471 memset(&sin6, 0, sizeof(sin6));
2472 sin6.sin6_family = AF_INET6;
2473 sin6.sin6_len = sizeof(sin6);
2474 sin6.sin6_port = sh->src_port;
2475 sin6.sin6_scope_id = cookie->scope_id;
2476 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2477 sizeof(sin6.sin6_addr.s6_addr));
2478 to = (struct sockaddr *)&sin6;
2482 case SCTP_IPV4_ADDRESS:
2483 memset(&sin, 0, sizeof(sin));
2484 sin.sin_family = AF_INET;
2485 sin.sin_len = sizeof(sin);
2486 sin.sin_port = sh->src_port;
2487 sin.sin_addr.s_addr = cookie->address[0];
2488 to = (struct sockaddr *)&sin;
2492 /* This should not happen */
2495 if (*stcb == NULL) {
2496 /* Yep, lets check */
2497 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2498 if (*stcb == NULL) {
2500 * We should have only got back the same inp. If we
2501 * got back a different ep we have a problem. The
2502 * original findep got back l_inp and now
2504 if (l_inp != *inp_p) {
2505 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2508 if (*locked_tcb == NULL) {
2510 * In this case we found the assoc only
2511 * after we locked the create lock. This
2512 * means we are in a colliding case and we
2513 * must make sure that we unlock the tcb if
2514 * its one of the cases where we throw away
2515 * the incoming packets.
2517 *locked_tcb = *stcb;
2520 * We must also increment the inp ref count
2521 * since the ref_count flags was set when we
2522 * did not find the TCB, now we found it
2523 * which reduces the refcount.. we must
2524 * raise it back out to balance it all :-)
2526 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2527 if ((*stcb)->sctp_ep != l_inp) {
2528 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2529 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2535 cookie_len -= SCTP_SIGNATURE_SIZE;
2536 if (*stcb == NULL) {
2537 /* this is the "normal" case... get a new TCB */
2538 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2539 cookie, cookie_len, *inp_p,
2540 netp, to, ¬ification,
2541 auth_skipped, auth_offset, auth_len,
2545 /* this is abnormal... cookie-echo on existing TCB */
2546 had_a_existing_tcb = 1;
2547 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2549 cookie, cookie_len, *inp_p, *stcb, netp, to,
2550 ¬ification, auth_skipped, auth_offset, auth_len,
2553 if (*stcb == NULL) {
2558 if (*stcb == NULL) {
2559 /* still no TCB... must be bad cookie-echo */
2562 if (*netp != NULL) {
2563 (*netp)->flowtype = mflowtype;
2564 (*netp)->flowid = mflowid;
2567 * Ok, we built an association so confirm the address we sent the
2570 netl = sctp_findnet(*stcb, to);
2572 * This code should in theory NOT run but
2575 /* TSNH! Huh, why do I need to add this address here? */
2576 if (sctp_add_remote_addr(*stcb, to, NULL, port,
2577 SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2580 netl = sctp_findnet(*stcb, to);
2583 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2584 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2585 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2590 sctp_start_net_timers(*stcb);
2591 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2592 if (!had_a_existing_tcb ||
2593 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2595 * If we have a NEW cookie or the connect never
2596 * reached the connected state during collision we
2597 * must do the TCP accept thing.
2599 struct socket *so, *oso;
2600 struct sctp_inpcb *inp;
2602 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2604 * For a restart we will keep the same
2605 * socket, no need to do anything. I THINK!!
2607 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2608 if (send_int_conf) {
2609 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2610 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2614 oso = (*inp_p)->sctp_socket;
2615 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2616 SCTP_TCB_UNLOCK((*stcb));
2617 CURVNET_SET(oso->so_vnet);
2618 so = sonewconn(oso, 0
2621 SCTP_TCB_LOCK((*stcb));
2622 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2625 struct mbuf *op_err;
2627 /* Too many sockets */
2628 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2629 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2630 sctp_abort_association(*inp_p, NULL, m, iphlen,
2631 src, dst, sh, op_err,
2634 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2635 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2638 inp = (struct sctp_inpcb *)so->so_pcb;
2639 SCTP_INP_INCR_REF(inp);
2641 * We add the unbound flag here so that if we get an
2642 * soabort() before we get the move_pcb done, we
2643 * will properly cleanup.
2645 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2646 SCTP_PCB_FLAGS_CONNECTED |
2647 SCTP_PCB_FLAGS_IN_TCPPOOL |
2648 SCTP_PCB_FLAGS_UNBOUND |
2649 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2650 SCTP_PCB_FLAGS_DONT_WAKE);
2651 inp->sctp_features = (*inp_p)->sctp_features;
2652 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2653 inp->sctp_socket = so;
2654 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2655 inp->max_cwnd = (*inp_p)->max_cwnd;
2656 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2657 inp->ecn_supported = (*inp_p)->ecn_supported;
2658 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2659 inp->auth_supported = (*inp_p)->auth_supported;
2660 inp->asconf_supported = (*inp_p)->asconf_supported;
2661 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2662 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2663 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2664 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2665 inp->sctp_context = (*inp_p)->sctp_context;
2666 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2667 inp->fibnum = (*inp_p)->fibnum;
2669 * copy in the authentication parameters from the
2672 if (inp->sctp_ep.local_hmacs)
2673 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2674 inp->sctp_ep.local_hmacs =
2675 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2676 if (inp->sctp_ep.local_auth_chunks)
2677 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2678 inp->sctp_ep.local_auth_chunks =
2679 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2682 * Now we must move it from one hash table to
2683 * another and get the tcb in the right place.
2687 * This is where the one-2-one socket is put into
2688 * the accept state waiting for the accept!
2691 SCTP_ADD_SUBSTATE(*stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
2693 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2695 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2696 SCTP_TCB_UNLOCK((*stcb));
2698 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2700 SCTP_TCB_LOCK((*stcb));
2701 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2704 * now we must check to see if we were aborted while
2705 * the move was going on and the lock/unlock
2708 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2710 * yep it was, we leave the assoc attached
2711 * to the socket since the sctp_inpcb_free()
2712 * call will send an abort for us.
2714 SCTP_INP_DECR_REF(inp);
2717 SCTP_INP_DECR_REF(inp);
2718 /* Switch over to the new guy */
2720 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2721 if (send_int_conf) {
2722 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2723 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2727 * Pull it from the incomplete queue and wake the
2735 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2737 if (send_int_conf) {
2738 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2739 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2745 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2746 struct sctp_tcb *stcb, struct sctp_nets *net)
2748 /* cp must not be used, others call this without a c-ack :-) */
2749 struct sctp_association *asoc;
2750 struct sctp_tmit_chunk *chk;
2752 SCTPDBG(SCTP_DEBUG_INPUT2,
2753 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2754 if ((stcb == NULL) || (net == NULL)) {
2759 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
2760 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
2761 asoc->overall_error_count,
2763 SCTP_FROM_SCTP_INPUT,
2766 asoc->overall_error_count = 0;
2767 sctp_stop_all_cookie_timers(stcb);
2768 /* process according to association state */
2769 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
2770 /* state change only needed when I am in right state */
2771 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2772 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2773 sctp_start_net_timers(stcb);
2774 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2775 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2776 stcb->sctp_ep, stcb, NULL);
2779 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2780 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2781 if (asoc->overall_error_count == 0) {
2782 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
2783 SCTP_RTT_FROM_NON_DATA);
2785 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2786 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2787 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2788 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2789 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2790 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
2791 soisconnected(stcb->sctp_socket);
2795 * since we did not send a HB make sure we don't double
2798 net->hb_responded = 1;
2800 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2802 * We don't need to do the asconf thing, nor hb or
2803 * autoclose if the socket is closed.
2808 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
2811 if (stcb->asoc.sctp_autoclose_ticks &&
2812 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2813 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
2814 stcb->sctp_ep, stcb, NULL);
2817 * send ASCONF if parameters are pending and ASCONFs are
2818 * allowed (eg. addresses changed when init/cookie echo were
2821 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
2822 (stcb->asoc.asconf_supported == 1) &&
2823 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
2824 #ifdef SCTP_TIMER_BASED_ASCONF
2825 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2826 stcb->sctp_ep, stcb,
2827 stcb->asoc.primary_destination);
2829 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2830 SCTP_ADDR_NOT_LOCKED);
2835 /* Toss the cookie if I can */
2836 sctp_toss_old_cookies(stcb, asoc);
2837 /* Restart the timer if we have pending data */
2838 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
2839 if (chk->whoTo != NULL) {
2844 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
2849 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
2850 struct sctp_tcb *stcb)
2852 struct sctp_nets *net;
2853 struct sctp_tmit_chunk *lchk;
2854 struct sctp_ecne_chunk bkup;
2855 uint8_t override_bit;
2856 uint32_t tsn, window_data_tsn;
2858 unsigned int pkt_cnt;
2860 len = ntohs(cp->ch.chunk_length);
2861 if (len == sizeof(struct old_sctp_ecne_chunk)) {
2862 /* Its the old format */
2863 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
2864 bkup.num_pkts_since_cwr = htonl(1);
2867 SCTP_STAT_INCR(sctps_recvecne);
2868 tsn = ntohl(cp->tsn);
2869 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
2870 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
2872 window_data_tsn = stcb->asoc.sending_seq - 1;
2874 window_data_tsn = lchk->rec.data.tsn;
2877 /* Find where it was sent to if possible. */
2879 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
2880 if (lchk->rec.data.tsn == tsn) {
2882 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
2885 if (SCTP_TSN_GT(lchk->rec.data.tsn, tsn)) {
2891 * What to do. A previous send of a CWR was possibly lost.
2892 * See how old it is, we may have it marked on the actual
2895 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2896 if (tsn == net->last_cwr_tsn) {
2897 /* Found him, send it off */
2903 * If we reach here, we need to send a special CWR
2904 * that says hey, we did this a long time ago and
2905 * you lost the response.
2907 net = TAILQ_FIRST(&stcb->asoc.nets);
2912 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
2919 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
2920 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2922 * JRS - Use the congestion control given in the pluggable
2925 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
2927 * We reduce once every RTT. So we will only lower cwnd at
2928 * the next sending seq i.e. the window_data_tsn
2930 net->cwr_window_tsn = window_data_tsn;
2931 net->ecn_ce_pkt_cnt += pkt_cnt;
2932 net->lost_cnt = pkt_cnt;
2933 net->last_cwr_tsn = tsn;
2935 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
2936 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
2937 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2939 * Another loss in the same window update how many
2940 * marks/packets lost we have had.
2944 if (pkt_cnt > net->lost_cnt) {
2945 /* Should be the case */
2946 cnt = (pkt_cnt - net->lost_cnt);
2947 net->ecn_ce_pkt_cnt += cnt;
2949 net->lost_cnt = pkt_cnt;
2950 net->last_cwr_tsn = tsn;
2952 * Most CC functions will ignore this call, since we
2953 * are in-window yet of the initial CE the peer saw.
2955 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
2959 * We always send a CWR this way if our previous one was lost our
2960 * peer will get an update, or if it is not time again to reduce we
2961 * still get the cwr to the peer. Note we set the override when we
2962 * could not find the TSN on the chunk or the destination network.
2964 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
2968 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
2971 * Here we get a CWR from the peer. We must look in the outqueue and
2972 * make sure that we have a covered ECNE in the control chunk part.
2975 struct sctp_tmit_chunk *chk, *nchk;
2976 struct sctp_ecne_chunk *ecne;
2980 cwr_tsn = ntohl(cp->tsn);
2981 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
2982 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.control_send_queue, sctp_next, nchk) {
2983 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
2986 if ((override == 0) && (chk->whoTo != net)) {
2987 /* Must be from the right src unless override is set */
2990 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
2991 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
2992 /* this covers this ECNE, we can remove it */
2993 stcb->asoc.ecn_echo_cnt_onq--;
2994 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
2996 stcb->asoc.ctrl_queue_cnt--;
2997 sctp_m_freem(chk->data);
2999 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3000 if (override == 0) {
3008 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3009 struct sctp_tcb *stcb, struct sctp_nets *net)
3012 SCTPDBG(SCTP_DEBUG_INPUT2,
3013 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3017 /* process according to association state */
3018 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3019 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3020 SCTPDBG(SCTP_DEBUG_INPUT2,
3021 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3022 SCTP_TCB_UNLOCK(stcb);
3025 /* notify upper layer protocol */
3026 if (stcb->sctp_socket) {
3027 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3030 if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
3031 !TAILQ_EMPTY(&stcb->asoc.sent_queue) ||
3032 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
3033 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3036 /* stop the timer */
3037 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3038 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3039 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3041 SCTPDBG(SCTP_DEBUG_INPUT2,
3042 "sctp_handle_shutdown_complete: calls free-asoc\n");
3043 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3044 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3049 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3050 struct sctp_nets *net, uint8_t flg)
3052 switch (desc->chunk_type) {
3055 /* find the tsn to resend (possibly) */
3058 struct sctp_tmit_chunk *tp1;
3060 tsn = ntohl(desc->tsn_ifany);
3061 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3062 if (tp1->rec.data.tsn == tsn) {
3066 if (SCTP_TSN_GT(tp1->rec.data.tsn, tsn)) {
3074 * Do it the other way , aka without paying
3075 * attention to queue seq order.
3077 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3078 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3079 if (tp1->rec.data.tsn == tsn) {
3086 SCTP_STAT_INCR(sctps_pdrptsnnf);
3088 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3089 if (((flg & SCTP_BADCRC) == 0) &&
3090 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3093 if ((stcb->asoc.peers_rwnd == 0) &&
3094 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3095 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3098 if (stcb->asoc.peers_rwnd == 0 &&
3099 (flg & SCTP_FROM_MIDDLE_BOX)) {
3100 SCTP_STAT_INCR(sctps_pdrpdizrw);
3103 if ((uint32_t)SCTP_BUF_LEN(tp1->data) <
3104 SCTP_DATA_CHUNK_OVERHEAD(stcb) + SCTP_NUM_DB_TO_VERIFY) {
3105 /* Payload not matching. */
3106 SCTP_STAT_INCR(sctps_pdrpbadd);
3109 if (memcmp(mtod(tp1->data, caddr_t)+SCTP_DATA_CHUNK_OVERHEAD(stcb),
3110 desc->data_bytes, SCTP_NUM_DB_TO_VERIFY) != 0) {
3111 /* Payload not matching. */
3112 SCTP_STAT_INCR(sctps_pdrpbadd);
3117 * this guy had a RTO calculation
3118 * pending on it, cancel it
3120 if (tp1->whoTo->rto_needed == 0) {
3121 tp1->whoTo->rto_needed = 1;
3125 SCTP_STAT_INCR(sctps_pdrpmark);
3126 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3127 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3129 * mark it as if we were doing a FR, since
3130 * we will be getting gap ack reports behind
3131 * the info from the router.
3133 tp1->rec.data.doing_fast_retransmit = 1;
3135 * mark the tsn with what sequences can
3138 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3139 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3141 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
3144 /* restart the timer */
3145 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3147 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3148 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3151 /* fix counts and things */
3152 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3153 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3154 tp1->whoTo->flight_size,
3156 (uint32_t)(uintptr_t)stcb,
3159 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3160 sctp_flight_size_decrease(tp1);
3161 sctp_total_flight_decrease(stcb, tp1);
3163 tp1->sent = SCTP_DATAGRAM_RESEND;
3169 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3170 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3173 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3175 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3178 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3179 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3180 audit, stcb->asoc.sent_queue_retran_cnt);
3181 #ifndef SCTP_AUDITING_ENABLED
3182 stcb->asoc.sent_queue_retran_cnt = audit;
3190 struct sctp_tmit_chunk *asconf;
3192 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3194 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3199 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3200 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3201 asconf->sent = SCTP_DATAGRAM_RESEND;
3202 asconf->snd_count--;
3206 case SCTP_INITIATION:
3207 /* resend the INIT */
3208 stcb->asoc.dropped_special_cnt++;
3209 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3211 * If we can get it in, in a few attempts we do
3212 * this, otherwise we let the timer fire.
3214 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3216 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3217 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3220 case SCTP_SELECTIVE_ACK:
3221 case SCTP_NR_SELECTIVE_ACK:
3222 /* resend the sack */
3223 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3225 case SCTP_HEARTBEAT_REQUEST:
3226 /* resend a demand HB */
3227 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3229 * Only retransmit if we KNOW we wont destroy the
3232 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3236 sctp_send_shutdown(stcb, net);
3238 case SCTP_SHUTDOWN_ACK:
3239 sctp_send_shutdown_ack(stcb, net);
3241 case SCTP_COOKIE_ECHO:
3243 struct sctp_tmit_chunk *cookie;
3246 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3248 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3253 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3254 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3255 cookie->sent = SCTP_DATAGRAM_RESEND;
3256 sctp_stop_all_cookie_timers(stcb);
3260 case SCTP_COOKIE_ACK:
3261 sctp_send_cookie_ack(stcb);
3263 case SCTP_ASCONF_ACK:
3264 /* resend last asconf ack */
3265 sctp_send_asconf_ack(stcb);
3267 case SCTP_IFORWARD_CUM_TSN:
3268 case SCTP_FORWARD_CUM_TSN:
3269 send_forward_tsn(stcb, &stcb->asoc);
3271 /* can't do anything with these */
3272 case SCTP_PACKET_DROPPED:
3273 case SCTP_INITIATION_ACK: /* this should not happen */
3274 case SCTP_HEARTBEAT_ACK:
3275 case SCTP_ABORT_ASSOCIATION:
3276 case SCTP_OPERATION_ERROR:
3277 case SCTP_SHUTDOWN_COMPLETE:
3287 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3293 * We set things to 0xffffffff since this is the last delivered
3294 * sequence and we will be sending in 0 after the reset.
3297 if (number_entries) {
3298 for (i = 0; i < number_entries; i++) {
3299 temp = ntohs(list[i]);
3300 if (temp >= stcb->asoc.streamincnt) {
3303 stcb->asoc.strmin[temp].last_mid_delivered = 0xffffffff;
3307 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3308 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3311 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3315 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3320 if (number_entries > 0) {
3321 for (i = 0; i < number_entries; i++) {
3322 temp = ntohs(list[i]);
3323 if (temp >= stcb->asoc.streamoutcnt) {
3324 /* no such stream */
3327 stcb->asoc.strmout[temp].next_mid_ordered = 0;
3328 stcb->asoc.strmout[temp].next_mid_unordered = 0;
3331 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3332 stcb->asoc.strmout[i].next_mid_ordered = 0;
3333 stcb->asoc.strmout[i].next_mid_unordered = 0;
3336 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3340 sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3345 if (number_entries > 0) {
3346 for (i = 0; i < number_entries; i++) {
3347 temp = ntohs(list[i]);
3348 if (temp >= stcb->asoc.streamoutcnt) {
3349 /* no such stream */
3352 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3355 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3356 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3361 struct sctp_stream_reset_request *
3362 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3364 struct sctp_association *asoc;
3365 struct sctp_chunkhdr *ch;
3366 struct sctp_stream_reset_request *r;
3367 struct sctp_tmit_chunk *chk;
3371 chk = asoc->str_reset;
3372 if (TAILQ_EMPTY(&asoc->control_send_queue) ||
3374 asoc->stream_reset_outstanding = 0;
3377 if (chk->data == NULL) {
3381 /* he wants a copy of the chk pointer */
3384 clen = chk->send_size;
3385 ch = mtod(chk->data, struct sctp_chunkhdr *);
3386 r = (struct sctp_stream_reset_request *)(ch + 1);
3387 if (ntohl(r->request_seq) == seq) {
3391 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3392 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3393 /* move to the next one, there can only be a max of two */
3394 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3395 if (ntohl(r->request_seq) == seq) {
3399 /* that seq is not here */
3404 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3406 struct sctp_association *asoc;
3407 struct sctp_tmit_chunk *chk;
3410 chk = asoc->str_reset;
3414 asoc->str_reset = NULL;
3415 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3416 NULL, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3417 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3418 asoc->ctrl_queue_cnt--;
3420 sctp_m_freem(chk->data);
3423 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3427 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3428 uint32_t seq, uint32_t action,
3429 struct sctp_stream_reset_response *respin)
3433 struct sctp_association *asoc = &stcb->asoc;
3434 struct sctp_tmit_chunk *chk;
3435 struct sctp_stream_reset_request *req_param;
3436 struct sctp_stream_reset_out_request *req_out_param;
3437 struct sctp_stream_reset_in_request *req_in_param;
3438 uint32_t number_entries;
3440 if (asoc->stream_reset_outstanding == 0) {
3444 if (seq == stcb->asoc.str_reset_seq_out) {
3445 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3446 if (req_param != NULL) {
3447 stcb->asoc.str_reset_seq_out++;
3448 type = ntohs(req_param->ph.param_type);
3449 lparam_len = ntohs(req_param->ph.param_length);
3450 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3453 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3454 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3455 asoc->stream_reset_out_is_outstanding = 0;
3456 if (asoc->stream_reset_outstanding)
3457 asoc->stream_reset_outstanding--;
3458 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3460 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3461 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3462 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3463 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3465 * Set it up so we don't stop
3468 asoc->stream_reset_outstanding++;
3469 stcb->asoc.str_reset_seq_out--;
3470 asoc->stream_reset_out_is_outstanding = 1;
3473 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3475 if (no_clear == 0) {
3476 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3478 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3479 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3480 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3481 if (asoc->stream_reset_outstanding)
3482 asoc->stream_reset_outstanding--;
3483 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3484 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3485 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3486 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3487 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3488 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3490 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3491 /* Ok we now may have more streams */
3494 num_stream = stcb->asoc.strm_pending_add_size;
3495 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3497 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3499 stcb->asoc.strm_pending_add_size = 0;
3500 if (asoc->stream_reset_outstanding)
3501 asoc->stream_reset_outstanding--;
3502 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3503 /* Put the new streams into effect */
3506 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3507 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3509 asoc->streamoutcnt += num_stream;
3510 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3511 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3512 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3513 SCTP_STREAM_CHANGE_DENIED);
3515 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3516 SCTP_STREAM_CHANGE_FAILED);
3518 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3519 if (asoc->stream_reset_outstanding)
3520 asoc->stream_reset_outstanding--;
3521 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3522 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3523 SCTP_STREAM_CHANGE_DENIED);
3524 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3525 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3526 SCTP_STREAM_CHANGE_FAILED);
3528 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3530 * a) Adopt the new in tsn.
3532 * c) Adopt the new out-tsn
3534 struct sctp_stream_reset_response_tsn *resp;
3535 struct sctp_forward_tsn_chunk fwdtsn;
3538 if (respin == NULL) {
3542 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3545 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3546 resp = (struct sctp_stream_reset_response_tsn *)respin;
3547 asoc->stream_reset_outstanding--;
3548 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3549 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3550 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3551 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3555 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3556 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3557 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3560 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3561 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3562 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3564 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3565 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3567 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3568 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3570 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3571 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3572 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3573 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3574 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3575 SCTP_ASSOC_RESET_DENIED);
3577 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3578 SCTP_ASSOC_RESET_FAILED);
3581 /* get rid of the request and get the request flags */
3582 if (asoc->stream_reset_outstanding == 0) {
3583 sctp_clean_up_stream_reset(stcb);
3587 if (asoc->stream_reset_outstanding == 0) {
3588 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3594 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3595 struct sctp_tmit_chunk *chk,
3596 struct sctp_stream_reset_in_request *req, int trunc)
3604 * peer wants me to send a str-reset to him for my outgoing seq's if
3607 struct sctp_association *asoc = &stcb->asoc;
3609 seq = ntohl(req->request_seq);
3610 if (asoc->str_reset_seq_in == seq) {
3611 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3612 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3613 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3615 /* Can't do it, since they exceeded our buffer size */
3616 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3617 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3618 len = ntohs(req->ph.param_length);
3619 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3620 if (number_entries) {
3621 for (i = 0; i < number_entries; i++) {
3622 temp = ntohs(req->list_of_streams[i]);
3623 if (temp >= stcb->asoc.streamoutcnt) {
3624 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3627 req->list_of_streams[i] = temp;
3629 for (i = 0; i < number_entries; i++) {
3630 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3631 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3636 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3637 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3638 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3641 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3643 /* Can't do it, since we have sent one out */
3644 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3647 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3648 asoc->str_reset_seq_in++;
3649 } else if (asoc->str_reset_seq_in - 1 == seq) {
3650 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3651 } else if (asoc->str_reset_seq_in - 2 == seq) {
3652 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3654 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3656 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3660 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3661 struct sctp_tmit_chunk *chk,
3662 struct sctp_stream_reset_tsn_request *req)
3664 /* reset all in and out and update the tsn */
3666 * A) reset my str-seq's on in and out. B) Select a receive next,
3667 * and set cum-ack to it. Also process this selected number as a
3668 * fwd-tsn as well. C) set in the response my next sending seq.
3670 struct sctp_forward_tsn_chunk fwdtsn;
3671 struct sctp_association *asoc = &stcb->asoc;
3675 seq = ntohl(req->request_seq);
3676 if (asoc->str_reset_seq_in == seq) {
3677 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3678 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3679 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3681 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3682 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3683 fwdtsn.ch.chunk_flags = 0;
3684 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3685 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3689 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3690 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3691 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3693 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3694 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3695 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3696 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3697 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3698 atomic_add_int(&asoc->sending_seq, 1);
3699 /* save off historical data for retrans */
3700 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3701 asoc->last_sending_seq[0] = asoc->sending_seq;
3702 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3703 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3704 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3705 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3706 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3707 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3709 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3710 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3711 asoc->str_reset_seq_in++;
3712 } else if (asoc->str_reset_seq_in - 1 == seq) {
3713 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3714 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3715 } else if (asoc->str_reset_seq_in - 2 == seq) {
3716 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3717 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3719 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3725 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3726 struct sctp_tmit_chunk *chk,
3727 struct sctp_stream_reset_out_request *req, int trunc)
3730 int number_entries, len;
3731 struct sctp_association *asoc = &stcb->asoc;
3733 seq = ntohl(req->request_seq);
3735 /* now if its not a duplicate we process it */
3736 if (asoc->str_reset_seq_in == seq) {
3737 len = ntohs(req->ph.param_length);
3738 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3740 * the sender is resetting, handle the list issue.. we must
3741 * a) verify if we can do the reset, if so no problem b) If
3742 * we can't do the reset we must copy the request. c) queue
3743 * it, and setup the data in processor to trigger it off
3744 * when needed and dequeue all the queued data.
3746 tsn = ntohl(req->send_reset_at_tsn);
3748 /* move the reset action back one */
3749 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3750 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3751 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3753 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3754 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
3755 /* we can do it now */
3756 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
3757 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3760 * we must queue it up and thus wait for the TSN's
3761 * to arrive that are at or before tsn
3763 struct sctp_stream_reset_list *liste;
3766 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
3767 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
3768 siz, SCTP_M_STRESET);
3769 if (liste == NULL) {
3770 /* gak out of memory */
3771 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3772 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3777 liste->number_entries = number_entries;
3778 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
3779 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
3780 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
3782 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3783 asoc->str_reset_seq_in++;
3784 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3786 * one seq back, just echo back last action since my
3787 * response was lost.
3789 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3790 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3792 * two 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[1]);
3797 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3802 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3803 struct sctp_stream_reset_add_strm *str_add)
3806 * Peer is requesting to add more streams. If its within our
3807 * max-streams we will allow it.
3809 uint32_t num_stream, i;
3811 struct sctp_association *asoc = &stcb->asoc;
3812 struct sctp_queued_to_read *ctl, *nctl;
3814 /* Get the number. */
3815 seq = ntohl(str_add->request_seq);
3816 num_stream = ntohs(str_add->number_of_streams);
3817 /* Now what would be the new total? */
3818 if (asoc->str_reset_seq_in == seq) {
3819 num_stream += stcb->asoc.streamincnt;
3820 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3821 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3822 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3823 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
3824 (num_stream > 0xffff)) {
3825 /* We must reject it they ask for to many */
3827 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3829 /* Ok, we can do that :-) */
3830 struct sctp_stream_in *oldstrm;
3832 /* save off the old */
3833 oldstrm = stcb->asoc.strmin;
3834 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
3835 (num_stream * sizeof(struct sctp_stream_in)),
3837 if (stcb->asoc.strmin == NULL) {
3838 stcb->asoc.strmin = oldstrm;
3841 /* copy off the old data */
3842 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3843 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3844 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3845 stcb->asoc.strmin[i].sid = i;
3846 stcb->asoc.strmin[i].last_mid_delivered = oldstrm[i].last_mid_delivered;
3847 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
3848 stcb->asoc.strmin[i].pd_api_started = oldstrm[i].pd_api_started;
3849 /* now anything on those queues? */
3850 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next_instrm, nctl) {
3851 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next_instrm);
3852 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next_instrm);
3854 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].uno_inqueue, next_instrm, nctl) {
3855 TAILQ_REMOVE(&oldstrm[i].uno_inqueue, ctl, next_instrm);
3856 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].uno_inqueue, ctl, next_instrm);
3859 /* Init the new streams */
3860 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
3861 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3862 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3863 stcb->asoc.strmin[i].sid = i;
3864 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3865 stcb->asoc.strmin[i].pd_api_started = 0;
3866 stcb->asoc.strmin[i].delivery_started = 0;
3868 SCTP_FREE(oldstrm, SCTP_M_STRMI);
3869 /* update the size */
3870 stcb->asoc.streamincnt = num_stream;
3871 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3872 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3874 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3875 asoc->str_reset_seq_in++;
3876 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3878 * one seq back, just echo back last action since my
3879 * response was lost.
3881 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3882 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3884 * two 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[1]);
3889 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3894 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3895 struct sctp_stream_reset_add_strm *str_add)
3898 * Peer is requesting to add more streams. If its within our
3899 * max-streams we will allow it.
3901 uint16_t num_stream;
3903 struct sctp_association *asoc = &stcb->asoc;
3905 /* Get the number. */
3906 seq = ntohl(str_add->request_seq);
3907 num_stream = ntohs(str_add->number_of_streams);
3908 /* Now what would be the new total? */
3909 if (asoc->str_reset_seq_in == seq) {
3910 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3911 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3912 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3913 } else if (stcb->asoc.stream_reset_outstanding) {
3914 /* We must reject it we have something pending */
3915 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3917 /* Ok, we can do that :-) */
3920 mychk = stcb->asoc.streamoutcnt;
3921 mychk += num_stream;
3922 if (mychk < 0x10000) {
3923 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3924 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
3925 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3928 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3931 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
3932 asoc->str_reset_seq_in++;
3933 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3935 * one seq back, just echo back last action since my
3936 * response was lost.
3938 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3939 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3941 * two 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[1]);
3946 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3951 __attribute__((noinline))
3954 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3955 struct sctp_chunkhdr *ch_req)
3957 uint16_t remaining_length, param_len, ptype;
3958 struct sctp_paramhdr pstore;
3959 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
3963 struct sctp_tmit_chunk *chk;
3964 struct sctp_chunkhdr *ch;
3965 struct sctp_paramhdr *ph;
3969 /* now it may be a reset or a reset-response */
3970 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
3972 /* setup for adding the response */
3973 sctp_alloc_a_chunk(stcb, chk);
3977 chk->copy_by_ref = 0;
3978 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
3979 chk->rec.chunk_id.can_take_data = 0;
3981 chk->asoc = &stcb->asoc;
3982 chk->no_fr_allowed = 0;
3983 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
3984 chk->book_size_scale = 0;
3985 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
3986 if (chk->data == NULL) {
3989 sctp_m_freem(chk->data);
3992 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3995 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
3997 /* setup chunk parameters */
3998 chk->sent = SCTP_DATAGRAM_UNSENT;
4002 ch = mtod(chk->data, struct sctp_chunkhdr *);
4003 ch->chunk_type = SCTP_STREAM_RESET;
4004 ch->chunk_flags = 0;
4005 ch->chunk_length = htons(chk->send_size);
4006 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4007 offset += sizeof(struct sctp_chunkhdr);
4008 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
4009 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *)&pstore);
4014 param_len = ntohs(ph->param_length);
4015 if ((param_len > remaining_length) ||
4016 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
4017 /* bad parameter length */
4020 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
4021 (uint8_t *)&cstore);
4026 ptype = ntohs(ph->param_type);
4028 if (param_len > sizeof(cstore)) {
4033 if (num_param > SCTP_MAX_RESET_PARAMS) {
4034 /* hit the max of parameters already sorry.. */
4037 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4038 struct sctp_stream_reset_out_request *req_out;
4040 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4043 req_out = (struct sctp_stream_reset_out_request *)ph;
4045 if (stcb->asoc.stream_reset_outstanding) {
4046 seq = ntohl(req_out->response_seq);
4047 if (seq == stcb->asoc.str_reset_seq_out) {
4049 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4052 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4053 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4054 struct sctp_stream_reset_add_strm *str_add;
4056 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4059 str_add = (struct sctp_stream_reset_add_strm *)ph;
4061 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4062 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4063 struct sctp_stream_reset_add_strm *str_add;
4065 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4068 str_add = (struct sctp_stream_reset_add_strm *)ph;
4070 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4071 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4072 struct sctp_stream_reset_in_request *req_in;
4075 req_in = (struct sctp_stream_reset_in_request *)ph;
4076 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4077 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4078 struct sctp_stream_reset_tsn_request *req_tsn;
4081 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4082 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4084 goto strres_nochunk;
4088 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4089 struct sctp_stream_reset_response *resp;
4092 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4095 resp = (struct sctp_stream_reset_response *)ph;
4096 seq = ntohl(resp->response_seq);
4097 result = ntohl(resp->result);
4098 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4100 goto strres_nochunk;
4105 offset += SCTP_SIZE32(param_len);
4106 if (remaining_length >= SCTP_SIZE32(param_len)) {
4107 remaining_length -= SCTP_SIZE32(param_len);
4109 remaining_length = 0;
4113 /* we have no response free the stuff */
4114 goto strres_nochunk;
4116 /* ok we have a chunk to link in */
4117 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4120 stcb->asoc.ctrl_queue_cnt++;
4125 * Handle a router or endpoints report of a packet loss, there are two ways
4126 * to handle this, either we get the whole packet and must disect it
4127 * ourselves (possibly with truncation and or corruption) or it is a summary
4128 * from a middle box that did the disectting for us.
4131 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4132 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4134 struct sctp_chunk_desc desc;
4135 struct sctp_chunkhdr *chk_hdr;
4136 struct sctp_data_chunk *data_chunk;
4137 struct sctp_idata_chunk *idata_chunk;
4138 uint32_t bottle_bw, on_queue;
4139 uint32_t offset, chk_len;
4140 uint16_t pktdrp_len;
4141 uint8_t pktdrp_flags;
4143 KASSERT(sizeof(struct sctp_pktdrop_chunk) <= limit,
4144 ("PKTDROP chunk too small"));
4145 pktdrp_flags = cp->ch.chunk_flags;
4146 pktdrp_len = ntohs(cp->ch.chunk_length);
4147 KASSERT(limit <= pktdrp_len, ("Inconsistent limit"));
4148 if (pktdrp_flags & SCTP_PACKET_TRUNCATED) {
4149 if (ntohs(cp->trunc_len) <= pktdrp_len - sizeof(struct sctp_pktdrop_chunk)) {
4150 /* The peer plays games with us. */
4154 limit -= sizeof(struct sctp_pktdrop_chunk);
4156 if (offset == limit) {
4157 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4158 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4160 } else if (offset + sizeof(struct sctphdr) > limit) {
4161 /* Only a partial SCTP common header. */
4162 SCTP_STAT_INCR(sctps_pdrpcrupt);
4165 /* XXX: Check embedded SCTP common header. */
4166 offset += sizeof(struct sctphdr);
4168 /* Now parse through the chunks themselves. */
4169 while (offset < limit) {
4170 if (offset + sizeof(struct sctp_chunkhdr) > limit) {
4171 SCTP_STAT_INCR(sctps_pdrpcrupt);
4174 chk_hdr = (struct sctp_chunkhdr *)(cp->data + offset);
4175 desc.chunk_type = chk_hdr->chunk_type;
4176 /* get amount we need to move */
4177 chk_len = (uint32_t)ntohs(chk_hdr->chunk_length);
4178 if (chk_len < sizeof(struct sctp_chunkhdr)) {
4179 /* Someone is lying... */
4182 if (desc.chunk_type == SCTP_DATA) {
4183 if (stcb->asoc.idata_supported) {
4184 /* Some is playing games with us. */
4187 if (chk_len <= sizeof(struct sctp_data_chunk)) {
4188 /* Some is playing games with us. */
4191 if (chk_len < sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4193 * Not enough data bytes available in the
4196 SCTP_STAT_INCR(sctps_pdrpnedat);
4199 if (offset + sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4200 /* Not enough data in buffer. */
4203 data_chunk = (struct sctp_data_chunk *)(cp->data + offset);
4204 memcpy(desc.data_bytes, data_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4205 desc.tsn_ifany = data_chunk->dp.tsn;
4206 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4207 SCTP_STAT_INCR(sctps_pdrpmbda);
4209 } else if (desc.chunk_type == SCTP_IDATA) {
4210 if (!stcb->asoc.idata_supported) {
4211 /* Some is playing games with us. */
4214 if (chk_len <= sizeof(struct sctp_idata_chunk)) {
4215 /* Some is playing games with us. */
4218 if (chk_len < sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4220 * Not enough data bytes available in the
4223 SCTP_STAT_INCR(sctps_pdrpnedat);
4226 if (offset + sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4227 /* Not enough data in buffer. */
4230 idata_chunk = (struct sctp_idata_chunk *)(cp->data + offset);
4231 memcpy(desc.data_bytes, idata_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4232 desc.tsn_ifany = idata_chunk->dp.tsn;
4233 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4234 SCTP_STAT_INCR(sctps_pdrpmbda);
4237 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4238 SCTP_STAT_INCR(sctps_pdrpmbct);
4241 if (process_chunk_drop(stcb, &desc, net, pktdrp_flags)) {
4242 SCTP_STAT_INCR(sctps_pdrppdbrk);
4246 offset += SCTP_SIZE32(chk_len);
4248 /* Now update any rwnd --- possibly */
4249 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4250 /* From a peer, we get a rwnd report */
4253 SCTP_STAT_INCR(sctps_pdrpfehos);
4255 bottle_bw = ntohl(cp->bottle_bw);
4256 on_queue = ntohl(cp->current_onq);
4257 if (bottle_bw && on_queue) {
4258 /* a rwnd report is in here */
4259 if (bottle_bw > on_queue)
4260 a_rwnd = bottle_bw - on_queue;
4265 stcb->asoc.peers_rwnd = 0;
4267 if (a_rwnd > stcb->asoc.total_flight) {
4268 stcb->asoc.peers_rwnd =
4269 a_rwnd - stcb->asoc.total_flight;
4271 stcb->asoc.peers_rwnd = 0;
4273 if (stcb->asoc.peers_rwnd <
4274 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4275 /* SWS sender side engages */
4276 stcb->asoc.peers_rwnd = 0;
4281 SCTP_STAT_INCR(sctps_pdrpfmbox);
4284 /* now middle boxes in sat networks get a cwnd bump */
4285 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) &&
4286 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4287 (stcb->asoc.sat_network)) {
4289 * This is debatable but for sat networks it makes sense
4290 * Note if a T3 timer has went off, we will prohibit any
4291 * changes to cwnd until we exit the t3 loss recovery.
4293 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4294 net, cp, &bottle_bw, &on_queue);
4299 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4300 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4301 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4302 * length of the complete packet outputs: - length: modified to remaining
4303 * length after control processing - netp: modified to new sctp_nets after
4304 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4305 * bad packet,...) otherwise return the tcb for this packet
4308 __attribute__((noinline))
4310 static struct sctp_tcb *
4311 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4312 struct sockaddr *src, struct sockaddr *dst,
4313 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4314 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4315 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4316 uint32_t vrf_id, uint16_t port)
4318 struct sctp_association *asoc;
4319 struct mbuf *op_err;
4320 char msg[SCTP_DIAG_INFO_LEN];
4322 int num_chunks = 0; /* number of control chunks processed */
4323 uint32_t chk_length, contiguous;
4325 int abort_no_unlock = 0;
4330 * How big should this be, and should it be alloc'd? Lets try the
4331 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4332 * until we get into jumbo grams and such..
4334 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4336 uint32_t auth_offset = 0, auth_len = 0;
4337 int auth_skipped = 0;
4340 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4341 iphlen, *offset, length, (void *)stcb);
4344 SCTP_TCB_LOCK_ASSERT(stcb);
4346 /* validate chunk header length... */
4347 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4348 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4349 ntohs(ch->chunk_length));
4354 * validate the verification tag
4356 vtag_in = ntohl(sh->v_tag);
4358 if (ch->chunk_type == SCTP_INITIATION) {
4359 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4360 ntohs(ch->chunk_length), vtag_in);
4362 /* protocol error- silently discard... */
4363 SCTP_STAT_INCR(sctps_badvtag);
4365 SCTP_TCB_UNLOCK(stcb);
4369 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4371 * If there is no stcb, skip the AUTH chunk and process
4372 * later after a stcb is found (to validate the lookup was
4375 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4377 (inp->auth_supported == 1)) {
4378 /* save this chunk for later processing */
4380 auth_offset = *offset;
4381 auth_len = ntohs(ch->chunk_length);
4383 /* (temporarily) move past this chunk */
4384 *offset += SCTP_SIZE32(auth_len);
4385 if (*offset >= length) {
4386 /* no more data left in the mbuf chain */
4390 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4391 sizeof(struct sctp_chunkhdr), chunk_buf);
4398 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4399 goto process_control_chunks;
4402 * first check if it's an ASCONF with an unknown src addr we
4403 * need to look inside to find the association
4405 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4406 struct sctp_chunkhdr *asconf_ch = ch;
4407 uint32_t asconf_offset = 0, asconf_len = 0;
4409 /* inp's refcount may be reduced */
4410 SCTP_INP_INCR_REF(inp);
4412 asconf_offset = *offset;
4414 asconf_len = ntohs(asconf_ch->chunk_length);
4415 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4417 stcb = sctp_findassociation_ep_asconf(m,
4420 sh, &inp, netp, vrf_id);
4423 asconf_offset += SCTP_SIZE32(asconf_len);
4424 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4425 sizeof(struct sctp_chunkhdr), chunk_buf);
4426 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4429 * reduce inp's refcount if not reduced in
4430 * sctp_findassociation_ep_asconf().
4432 SCTP_INP_DECR_REF(inp);
4435 /* now go back and verify any auth chunk to be sure */
4436 if (auth_skipped && (stcb != NULL)) {
4437 struct sctp_auth_chunk *auth;
4439 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
4440 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, chunk_buf);
4446 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4448 /* auth HMAC failed so dump it */
4452 /* remaining chunks are HMAC checked */
4453 stcb->asoc.authenticated = 1;
4458 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4459 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4461 /* no association, so it's out of the blue... */
4462 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4463 mflowtype, mflowid, inp->fibnum,
4469 /* ABORT and SHUTDOWN can use either v_tag... */
4470 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4471 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4472 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4473 /* Take the T-bit always into account. */
4474 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4475 (vtag_in == asoc->my_vtag)) ||
4476 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4477 (asoc->peer_vtag != htonl(0)) &&
4478 (vtag_in == asoc->peer_vtag))) {
4481 /* drop this packet... */
4482 SCTP_STAT_INCR(sctps_badvtag);
4484 SCTP_TCB_UNLOCK(stcb);
4489 /* for all other chunks, vtag must match */
4490 if (vtag_in != asoc->my_vtag) {
4491 /* invalid vtag... */
4492 SCTPDBG(SCTP_DEBUG_INPUT3,
4493 "invalid vtag: %xh, expect %xh\n",
4494 vtag_in, asoc->my_vtag);
4495 SCTP_STAT_INCR(sctps_badvtag);
4497 SCTP_TCB_UNLOCK(stcb);
4503 } /* end if !SCTP_COOKIE_ECHO */
4505 * process all control chunks...
4507 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4508 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4509 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4510 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
4511 /* implied cookie-ack.. we must have lost the ack */
4512 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4516 process_control_chunks:
4517 while (IS_SCTP_CONTROL(ch)) {
4518 /* validate chunk length */
4519 chk_length = ntohs(ch->chunk_length);
4520 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4521 ch->chunk_type, chk_length);
4522 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4523 if (chk_length < sizeof(*ch) ||
4524 (*offset + (int)chk_length) > length) {
4528 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4530 * INIT and INIT-ACK only gets the init ack "header" portion
4531 * only because we don't have to process the peer's COOKIE.
4532 * All others get a complete chunk.
4534 switch (ch->chunk_type) {
4535 case SCTP_INITIATION:
4536 contiguous = sizeof(struct sctp_init_chunk);
4538 case SCTP_INITIATION_ACK:
4539 contiguous = sizeof(struct sctp_init_ack_chunk);
4542 contiguous = min(chk_length, sizeof(chunk_buf));
4545 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4554 /* Save off the last place we got a control from */
4556 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4558 * allow last_control to be NULL if
4559 * ASCONF... ASCONF processing will find the
4562 if ((netp != NULL) && (*netp != NULL))
4563 stcb->asoc.last_control_chunk_from = *netp;
4566 #ifdef SCTP_AUDITING_ENABLED
4567 sctp_audit_log(0xB0, ch->chunk_type);
4570 /* check to see if this chunk required auth, but isn't */
4571 if ((stcb != NULL) &&
4572 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4573 !stcb->asoc.authenticated) {
4574 /* "silently" ignore */
4575 SCTP_STAT_INCR(sctps_recvauthmissing);
4578 switch (ch->chunk_type) {
4579 case SCTP_INITIATION:
4580 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4581 /* The INIT chunk must be the only chunk. */
4582 if ((num_chunks > 1) ||
4583 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4585 * RFC 4960bis requires stopping the
4586 * processing of the packet.
4591 /* Honor our resource limit. */
4592 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4593 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4594 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
4595 mflowtype, mflowid, inp->fibnum,
4599 SCTP_TCB_UNLOCK(stcb);
4603 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4604 (struct sctp_init_chunk *)ch, inp,
4610 SCTP_TCB_UNLOCK(stcb);
4614 case SCTP_PAD_CHUNK:
4616 case SCTP_INITIATION_ACK:
4617 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT_ACK\n");
4618 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4619 /* We are not interested anymore */
4620 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size)) {
4625 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4626 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4631 /* The INIT-ACK chunk must be the only chunk. */
4632 if ((num_chunks > 1) ||
4633 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4637 if ((netp != NULL) && (*netp != NULL)) {
4638 ret = sctp_handle_init_ack(m, iphlen, *offset,
4640 (struct sctp_init_ack_chunk *)ch,
4649 if (abort_no_unlock) {
4653 * Special case, I must call the output routine to
4654 * get the cookie echoed
4656 if ((stcb != NULL) && (ret == 0)) {
4657 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4661 case SCTP_SELECTIVE_ACK:
4662 case SCTP_NR_SELECTIVE_ACK:
4665 uint32_t a_rwnd, cum_ack;
4666 uint16_t num_seg, num_nr_seg, num_dup;
4668 int offset_seg, offset_dup;
4670 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
4671 ch->chunk_type == SCTP_SELECTIVE_ACK ? "SCTP_SACK" : "SCTP_NR_SACK");
4672 SCTP_STAT_INCR(sctps_recvsacks);
4674 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing %s chunk\n",
4675 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK");
4678 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4679 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4680 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4684 if (stcb->asoc.nrsack_supported == 0) {
4687 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4688 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR_SACK chunk, too small\n");
4692 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4694 * If we have sent a shutdown-ack, we will pay no
4695 * attention to a sack sent in to us since
4696 * we don't care anymore.
4700 flags = ch->chunk_flags;
4701 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4702 struct sctp_sack_chunk *sack;
4704 sack = (struct sctp_sack_chunk *)ch;
4705 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4706 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4708 num_dup = ntohs(sack->sack.num_dup_tsns);
4709 a_rwnd = ntohl(sack->sack.a_rwnd);
4710 if (sizeof(struct sctp_sack_chunk) +
4711 num_seg * sizeof(struct sctp_gap_ack_block) +
4712 num_dup * sizeof(uint32_t) != chk_length) {
4713 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4716 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4717 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4719 struct sctp_nr_sack_chunk *nr_sack;
4721 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4722 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4723 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4724 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4725 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4726 a_rwnd = ntohl(nr_sack->nr_sack.a_rwnd);
4727 if (sizeof(struct sctp_nr_sack_chunk) +
4728 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4729 num_dup * sizeof(uint32_t) != chk_length) {
4730 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
4733 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
4734 offset_dup = offset_seg + (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block);
4736 SCTPDBG(SCTP_DEBUG_INPUT3, "%s process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4737 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK",
4738 cum_ack, num_seg, a_rwnd);
4739 stcb->asoc.seen_a_sack_this_pkt = 1;
4740 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4741 (num_seg == 0) && (num_nr_seg == 0) &&
4742 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4743 (stcb->asoc.saw_sack_with_frags == 0) &&
4744 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4745 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
4747 * We have a SIMPLE sack having no
4748 * prior segments and data on sent
4749 * queue to be acked. Use the faster
4750 * path sack processing. We also
4751 * allow window update sacks with no
4752 * missing segments to go this way
4755 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
4756 &abort_now, ecne_seen);
4758 if ((netp != NULL) && (*netp != NULL)) {
4759 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
4760 num_seg, num_nr_seg, num_dup, &abort_now, flags,
4761 cum_ack, a_rwnd, ecne_seen);
4765 /* ABORT signal from sack processing */
4769 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
4770 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
4771 (stcb->asoc.stream_queue_cnt == 0)) {
4772 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
4776 case SCTP_HEARTBEAT_REQUEST:
4777 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
4778 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4779 SCTP_STAT_INCR(sctps_recvheartbeat);
4780 sctp_send_heartbeat_ack(stcb, m, *offset,
4784 case SCTP_HEARTBEAT_ACK:
4785 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT_ACK\n");
4786 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
4790 SCTP_STAT_INCR(sctps_recvheartbeatack);
4791 if ((netp != NULL) && (*netp != NULL)) {
4792 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
4796 case SCTP_ABORT_ASSOCIATION:
4797 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
4800 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4801 if (sctp_handle_abort((struct sctp_abort_chunk *)ch, stcb, *netp)) {
4811 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
4813 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
4816 if ((netp != NULL) && (*netp != NULL)) {
4818 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
4819 stcb, *netp, &abort_flag);
4826 case SCTP_SHUTDOWN_ACK:
4827 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_ACK, stcb %p\n", (void *)stcb);
4828 if ((chk_length == sizeof(struct sctp_shutdown_ack_chunk)) &&
4829 (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4830 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
4835 case SCTP_OPERATION_ERROR:
4836 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP_ERR\n");
4837 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL) &&
4838 sctp_handle_error(ch, stcb, *netp, contiguous) < 0) {
4843 case SCTP_COOKIE_ECHO:
4844 SCTPDBG(SCTP_DEBUG_INPUT3,
4845 "SCTP_COOKIE_ECHO, stcb %p\n", (void *)stcb);
4846 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size > 0)) {
4849 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4850 /* We are not interested anymore */
4853 SCTP_TCB_UNLOCK(stcb);
4860 * First are we accepting? We do this again here
4861 * since it is possible that a previous endpoint WAS
4862 * listening responded to a INIT-ACK and then
4863 * closed. We opened and bound.. and are now no
4866 * XXXGL: notes on checking listen queue length.
4867 * 1) SCTP_IS_LISTENING() doesn't necessarily mean
4868 * SOLISTENING(), because a listening "UDP type"
4869 * socket isn't listening in terms of the socket
4870 * layer. It is a normal data flow socket, that
4871 * can fork off new connections. Thus, we should
4872 * look into sol_qlen only in case we are !UDP.
4873 * 2) Checking sol_qlen in general requires locking
4874 * the socket, and this code lacks that.
4876 if ((stcb == NULL) &&
4877 (!SCTP_IS_LISTENING(inp) ||
4878 (!(inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) &&
4879 inp->sctp_socket->sol_qlen >= inp->sctp_socket->sol_qlimit))) {
4880 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
4881 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
4882 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4883 sctp_abort_association(inp, stcb, m, iphlen,
4884 src, dst, sh, op_err,
4891 struct mbuf *ret_buf;
4892 struct sctp_inpcb *linp;
4893 struct sctp_tmit_chunk *chk;
4895 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
4896 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4907 SCTP_ASOC_CREATE_LOCK(linp);
4911 struct sctp_tcb *locked_stcb;
4915 sctp_handle_cookie_echo(m, iphlen,
4919 (struct sctp_cookie_echo_chunk *)ch,
4929 if ((locked_stcb != NULL) && (locked_stcb != stcb)) {
4930 SCTP_TCB_UNLOCK(locked_stcb);
4933 SCTP_TCB_LOCK_ASSERT(stcb);
4939 SCTP_ASOC_CREATE_UNLOCK(linp);
4941 if (ret_buf == NULL) {
4943 SCTP_TCB_UNLOCK(stcb);
4945 SCTPDBG(SCTP_DEBUG_INPUT3,
4946 "GAK, null buffer\n");
4950 /* if AUTH skipped, see if it verified... */
4955 /* Restart the timer if we have pending data */
4956 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
4957 if (chk->whoTo != NULL) {
4962 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
4966 case SCTP_COOKIE_ACK:
4967 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE_ACK, stcb %p\n", (void *)stcb);
4968 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
4971 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4972 /* We are not interested anymore */
4973 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
4976 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4977 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
4982 if ((netp != NULL) && (*netp != NULL)) {
4983 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
4987 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_ECHO\n");
4991 if (stcb->asoc.ecn_supported == 0) {
4994 if ((chk_length != sizeof(struct sctp_ecne_chunk)) &&
4995 (chk_length != sizeof(struct old_sctp_ecne_chunk))) {
4998 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, stcb);
5002 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_CWR\n");
5006 if (stcb->asoc.ecn_supported == 0) {
5009 if (chk_length != sizeof(struct sctp_cwr_chunk)) {
5012 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5014 case SCTP_SHUTDOWN_COMPLETE:
5015 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_COMPLETE, stcb %p\n", (void *)stcb);
5016 /* must be first and only chunk */
5017 if ((num_chunks > 1) ||
5018 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5022 if ((chk_length == sizeof(struct sctp_shutdown_complete_chunk)) &&
5023 (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5024 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5031 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5033 if (stcb->asoc.asconf_supported == 0) {
5036 sctp_handle_asconf(m, *offset, src,
5037 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5041 case SCTP_ASCONF_ACK:
5042 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF_ACK\n");
5046 if (stcb->asoc.asconf_supported == 0) {
5049 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5052 if ((netp != NULL) && (*netp != NULL)) {
5053 /* He's alive so give him credit */
5054 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5055 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5056 stcb->asoc.overall_error_count,
5058 SCTP_FROM_SCTP_INPUT,
5061 stcb->asoc.overall_error_count = 0;
5062 sctp_handle_asconf_ack(m, *offset,
5063 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5064 if (abort_no_unlock)
5068 case SCTP_FORWARD_CUM_TSN:
5069 case SCTP_IFORWARD_CUM_TSN:
5070 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
5071 ch->chunk_type == SCTP_FORWARD_CUM_TSN ? "FORWARD_TSN" : "I_FORWARD_TSN");
5075 if (stcb->asoc.prsctp_supported == 0) {
5078 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5081 if (((stcb->asoc.idata_supported == 1) && (ch->chunk_type == SCTP_FORWARD_CUM_TSN)) ||
5082 ((stcb->asoc.idata_supported == 0) && (ch->chunk_type == SCTP_IFORWARD_CUM_TSN))) {
5083 if (ch->chunk_type == SCTP_FORWARD_CUM_TSN) {
5084 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "FORWARD-TSN chunk received when I-FORWARD-TSN was negotiated");
5086 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "I-FORWARD-TSN chunk received when FORWARD-TSN was negotiated");
5088 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
5089 sctp_abort_an_association(inp, stcb, op_err, false, SCTP_SO_NOT_LOCKED);
5094 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5095 /* We are not interested anymore */
5096 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5097 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5102 * For sending a SACK this looks like DATA chunks.
5104 stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
5106 sctp_handle_forward_tsn(stcb,
5107 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5113 case SCTP_STREAM_RESET:
5114 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5118 if (stcb->asoc.reconfig_supported == 0) {
5121 if (chk_length < sizeof(struct sctp_stream_reset_tsn_req)) {
5124 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5125 /* stop processing */
5130 case SCTP_PACKET_DROPPED:
5131 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5135 if (stcb->asoc.pktdrop_supported == 0) {
5138 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5141 if ((netp != NULL) && (*netp != NULL)) {
5142 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5144 min(chk_length, contiguous));
5147 case SCTP_AUTHENTICATION:
5148 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5150 /* save the first AUTH for later processing */
5151 if (auth_skipped == 0) {
5152 auth_offset = *offset;
5153 auth_len = chk_length;
5156 /* skip this chunk (temporarily) */
5159 if (stcb->asoc.auth_supported == 0) {
5162 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5163 (chk_length > (sizeof(struct sctp_auth_chunk) +
5164 SCTP_AUTH_DIGEST_LEN_MAX))) {
5169 if (got_auth == 1) {
5170 /* skip this chunk... it's already auth'd */
5174 if (sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch, m, *offset)) {
5175 /* auth HMAC failed so dump the packet */
5179 /* remaining chunks are HMAC checked */
5180 stcb->asoc.authenticated = 1;
5186 /* it's an unknown chunk! */
5187 if ((ch->chunk_type & 0x40) &&
5189 (SCTP_GET_STATE(stcb) != SCTP_STATE_EMPTY) &&
5190 (SCTP_GET_STATE(stcb) != SCTP_STATE_INUSE) &&
5191 (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
5192 struct sctp_gen_error_cause *cause;
5195 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
5196 0, M_NOWAIT, 1, MT_DATA);
5197 if (op_err != NULL) {
5198 len = min(SCTP_SIZE32(chk_length), (uint32_t)(length - *offset));
5199 cause = mtod(op_err, struct sctp_gen_error_cause *);
5200 cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5201 cause->length = htons((uint16_t)(len + sizeof(struct sctp_gen_error_cause)));
5202 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5203 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5204 if (SCTP_BUF_NEXT(op_err) != NULL) {
5205 #ifdef SCTP_MBUF_LOGGING
5206 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5207 sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
5210 sctp_queue_op_err(stcb, op_err);
5212 sctp_m_freem(op_err);
5216 if ((ch->chunk_type & 0x80) == 0) {
5217 /* discard this packet */
5220 } /* else skip this bad chunk and continue... */
5222 } /* switch (ch->chunk_type) */
5225 /* get the next chunk */
5226 *offset += SCTP_SIZE32(chk_length);
5227 if (*offset >= length) {
5228 /* no more data left in the mbuf chain */
5231 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5232 sizeof(struct sctp_chunkhdr), chunk_buf);
5239 if ((asconf_cnt > 0) && (stcb != NULL)) {
5240 sctp_send_asconf_ack(stcb);
5246 * common input chunk processing (v4 and v6)
5249 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5250 struct sockaddr *src, struct sockaddr *dst,
5251 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5252 uint8_t compute_crc,
5254 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5255 uint32_t vrf_id, uint16_t port)
5258 int fwd_tsn_seen = 0, data_processed = 0;
5259 struct mbuf *m = *mm, *op_err;
5260 char msg[SCTP_DIAG_INFO_LEN];
5262 int cnt_ctrl_ready = 0;
5263 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5264 struct sctp_tcb *stcb = NULL;
5265 struct sctp_nets *net = NULL;
5267 SCTP_STAT_INCR(sctps_recvdatagrams);
5268 #ifdef SCTP_AUDITING_ENABLED
5269 sctp_audit_log(0xE0, 1);
5270 sctp_auditing(0, inp, stcb, net);
5272 if (compute_crc != 0) {
5273 uint32_t check, calc_check;
5275 check = sh->checksum;
5277 calc_check = sctp_calculate_cksum(m, iphlen);
5278 sh->checksum = check;
5279 if (calc_check != check) {
5280 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5281 calc_check, check, (void *)m, length, iphlen);
5282 stcb = sctp_findassociation_addr(m, offset, src, dst,
5283 sh, ch, &inp, &net, vrf_id);
5284 #if defined(INET) || defined(INET6)
5285 if ((ch->chunk_type != SCTP_INITIATION) &&
5286 (net != NULL) && (net->port != port)) {
5287 if (net->port == 0) {
5288 /* UDP encapsulation turned on. */
5289 net->mtu -= sizeof(struct udphdr);
5290 if (stcb->asoc.smallest_mtu > net->mtu) {
5291 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5293 } else if (port == 0) {
5294 /* UDP encapsulation turned off. */
5295 net->mtu += sizeof(struct udphdr);
5296 /* XXX Update smallest_mtu */
5302 net->flowtype = mflowtype;
5303 net->flowid = mflowid;
5305 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5306 if ((inp != NULL) && (stcb != NULL)) {
5307 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5308 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5309 } else if ((inp != NULL) && (stcb == NULL)) {
5312 SCTP_STAT_INCR(sctps_badsum);
5313 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5317 /* Destination port of 0 is illegal, based on RFC4960. */
5318 if (sh->dest_port == 0) {
5319 SCTP_STAT_INCR(sctps_hdrops);
5322 stcb = sctp_findassociation_addr(m, offset, src, dst,
5323 sh, ch, &inp, &net, vrf_id);
5324 #if defined(INET) || defined(INET6)
5325 if ((ch->chunk_type != SCTP_INITIATION) &&
5326 (net != NULL) && (net->port != port)) {
5327 if (net->port == 0) {
5328 /* UDP encapsulation turned on. */
5329 net->mtu -= sizeof(struct udphdr);
5330 if (stcb->asoc.smallest_mtu > net->mtu) {
5331 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5333 } else if (port == 0) {
5334 /* UDP encapsulation turned off. */
5335 net->mtu += sizeof(struct udphdr);
5336 /* XXX Update smallest_mtu */
5342 net->flowtype = mflowtype;
5343 net->flowid = mflowid;
5346 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5347 SCTP_STAT_INCR(sctps_noport);
5348 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5351 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5352 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
5353 sctp_send_shutdown_complete2(src, dst, sh,
5354 mflowtype, mflowid, fibnum,
5358 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5359 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
5362 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5363 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5364 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5365 (ch->chunk_type != SCTP_INIT))) {
5366 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5368 sctp_send_abort(m, iphlen, src, dst,
5370 mflowtype, mflowid, fibnum,
5375 } else if (stcb == NULL) {
5378 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5379 (void *)m, iphlen, offset, length, (void *)stcb);
5381 /* always clear this before beginning a packet */
5382 stcb->asoc.authenticated = 0;
5383 stcb->asoc.seen_a_sack_this_pkt = 0;
5384 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5385 (void *)stcb, stcb->asoc.state);
5387 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5388 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5390 * If we hit here, we had a ref count
5391 * up when the assoc was aborted and the
5392 * timer is clearing out the assoc, we should
5393 * NOT respond to any packet.. its OOTB.
5395 SCTP_TCB_UNLOCK(stcb);
5397 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5398 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5399 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5401 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5402 mflowtype, mflowid, inp->fibnum,
5407 if (IS_SCTP_CONTROL(ch)) {
5408 /* process the control portion of the SCTP packet */
5409 /* sa_ignore NO_NULL_CHK */
5410 stcb = sctp_process_control(m, iphlen, &offset, length,
5412 inp, stcb, &net, &fwd_tsn_seen,
5413 mflowtype, mflowid, fibnum,
5417 * This covers us if the cookie-echo was there and
5418 * it changes our INP.
5420 inp = stcb->sctp_ep;
5421 #if defined(INET) || defined(INET6)
5422 if ((ch->chunk_type != SCTP_INITIATION) &&
5423 (net != NULL) && (net->port != port)) {
5424 if (net->port == 0) {
5425 /* UDP encapsulation turned on. */
5426 net->mtu -= sizeof(struct udphdr);
5427 if (stcb->asoc.smallest_mtu > net->mtu) {
5428 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5430 } else if (port == 0) {
5431 /* UDP encapsulation turned off. */
5432 net->mtu += sizeof(struct udphdr);
5433 /* XXX Update smallest_mtu */
5441 * no control chunks, so pre-process DATA chunks (these
5442 * checks are taken care of by control processing)
5446 * if DATA only packet, and auth is required, then punt...
5447 * can't have authenticated without any AUTH (control)
5450 if ((stcb != NULL) &&
5451 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5452 /* "silently" ignore */
5453 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5454 SCTP_STAT_INCR(sctps_recvauthmissing);
5458 /* out of the blue DATA chunk */
5459 SCTP_PROBE5(receive, NULL, NULL, m, NULL, sh);
5460 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5461 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5463 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5464 mflowtype, mflowid, fibnum,
5468 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5469 /* v_tag mismatch! */
5470 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5471 SCTP_STAT_INCR(sctps_badvtag);
5476 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5479 * no valid TCB for this packet, or we found it's a bad
5480 * packet while processing control, or we're done with this
5481 * packet (done or skip rest of data), so we drop it...
5487 * DATA chunk processing
5489 /* plow through the data chunks while length > offset */
5492 * Rest should be DATA only. Check authentication state if AUTH for
5495 if ((length > offset) &&
5497 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5498 !stcb->asoc.authenticated) {
5499 /* "silently" ignore */
5500 SCTP_STAT_INCR(sctps_recvauthmissing);
5501 SCTPDBG(SCTP_DEBUG_AUTH1,
5502 "Data chunk requires AUTH, skipped\n");
5505 if (length > offset) {
5509 * First check to make sure our state is correct. We would
5510 * not get here unless we really did have a tag, so we don't
5511 * abort if this happens, just dump the chunk silently.
5513 switch (SCTP_GET_STATE(stcb)) {
5514 case SCTP_STATE_COOKIE_ECHOED:
5516 * we consider data with valid tags in this state
5517 * shows us the cookie-ack was lost. Imply it was
5520 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5522 case SCTP_STATE_COOKIE_WAIT:
5524 * We consider OOTB any data sent during asoc setup.
5526 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5527 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5529 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5530 mflowtype, mflowid, inp->fibnum,
5533 /* sa_ignore NOTREACHED */
5535 case SCTP_STATE_EMPTY: /* should not happen */
5536 case SCTP_STATE_INUSE: /* should not happen */
5537 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5538 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5541 /* sa_ignore NOTREACHED */
5543 case SCTP_STATE_OPEN:
5544 case SCTP_STATE_SHUTDOWN_SENT:
5547 /* plow through the data chunks while length > offset */
5548 retval = sctp_process_data(mm, iphlen, &offset, length,
5549 inp, stcb, net, &high_tsn);
5552 * The association aborted, NO UNLOCK needed since
5553 * the association is destroyed.
5562 * Anything important needs to have been m_copy'ed in
5567 /* take care of ecn */
5568 if ((data_processed == 1) &&
5569 (stcb->asoc.ecn_supported == 1) &&
5570 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5571 /* Yep, we need to add a ECNE */
5572 sctp_send_ecn_echo(stcb, net, high_tsn);
5575 if ((data_processed == 0) && (fwd_tsn_seen)) {
5577 uint32_t highest_tsn;
5579 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5580 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5582 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5584 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5585 stcb->asoc.send_sack = 1;
5586 sctp_sack_check(stcb, was_a_gap);
5587 } else if (fwd_tsn_seen) {
5588 stcb->asoc.send_sack = 1;
5590 /* trigger send of any chunks in queue... */
5592 #ifdef SCTP_AUDITING_ENABLED
5593 sctp_audit_log(0xE0, 2);
5594 sctp_auditing(1, inp, stcb, net);
5596 SCTPDBG(SCTP_DEBUG_INPUT1,
5597 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5598 stcb->asoc.peers_rwnd,
5599 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5600 stcb->asoc.total_flight);
5601 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5602 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5603 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5605 if (!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue) ||
5607 stcb->asoc.trigger_reset ||
5609 (stcb->asoc.peers_rwnd > 0 || stcb->asoc.total_flight == 0))) {
5610 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5611 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5612 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5614 #ifdef SCTP_AUDITING_ENABLED
5615 sctp_audit_log(0xE0, 3);
5616 sctp_auditing(2, inp, stcb, net);
5620 SCTP_TCB_UNLOCK(stcb);
5622 if (inp_decr != NULL) {
5623 /* reduce ref-count */
5624 SCTP_INP_WLOCK(inp_decr);
5625 SCTP_INP_DECR_REF(inp_decr);
5626 SCTP_INP_WUNLOCK(inp_decr);
5633 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5637 uint32_t vrf_id = 0;
5639 struct sockaddr_in src, dst;
5642 struct sctp_chunkhdr *ch;
5644 uint8_t compute_crc;
5650 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
5651 SCTP_RELEASE_PKT(i_pak);
5654 m = SCTP_HEADER_TO_CHAIN(i_pak);
5655 #ifdef SCTP_MBUF_LOGGING
5656 /* Log in any input mbufs */
5657 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5658 sctp_log_mbc(m, SCTP_MBUF_INPUT);
5661 #ifdef SCTP_PACKET_LOGGING
5662 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
5666 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
5667 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
5669 if_name(m->m_pkthdr.rcvif),
5670 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
5671 mflowid = m->m_pkthdr.flowid;
5672 mflowtype = M_HASHTYPE_GET(m);
5673 fibnum = M_GETFIB(m);
5674 SCTP_STAT_INCR(sctps_recvpackets);
5675 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
5676 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
5677 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5678 if (SCTP_BUF_LEN(m) < offset) {
5679 if ((m = m_pullup(m, offset)) == NULL) {
5680 SCTP_STAT_INCR(sctps_hdrops);
5684 ip = mtod(m, struct ip *);
5685 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
5686 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
5687 offset -= sizeof(struct sctp_chunkhdr);
5688 memset(&src, 0, sizeof(struct sockaddr_in));
5689 src.sin_family = AF_INET;
5690 src.sin_len = sizeof(struct sockaddr_in);
5691 src.sin_port = sh->src_port;
5692 src.sin_addr = ip->ip_src;
5693 memset(&dst, 0, sizeof(struct sockaddr_in));
5694 dst.sin_family = AF_INET;
5695 dst.sin_len = sizeof(struct sockaddr_in);
5696 dst.sin_port = sh->dest_port;
5697 dst.sin_addr = ip->ip_dst;
5698 length = ntohs(ip->ip_len);
5699 /* Validate mbuf chain length with IP payload length. */
5700 if (SCTP_HEADER_LEN(m) != length) {
5701 SCTPDBG(SCTP_DEBUG_INPUT1,
5702 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
5703 SCTP_STAT_INCR(sctps_hdrops);
5706 /* SCTP does not allow broadcasts or multicasts */
5707 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
5710 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
5713 ecn_bits = ip->ip_tos;
5714 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
5715 SCTP_STAT_INCR(sctps_recvhwcrc);
5718 SCTP_STAT_INCR(sctps_recvswcrc);
5721 sctp_common_input_processing(&m, iphlen, offset, length,
5722 (struct sockaddr *)&src,
5723 (struct sockaddr *)&dst,
5727 mflowtype, mflowid, fibnum,
5736 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5737 extern int *sctp_cpuarry;
5741 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
5748 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5754 uint32_t flowid, tag;
5756 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
5757 flowid = m->m_pkthdr.flowid;
5760 * No flow id built by lower layers fix it so we
5763 offset = off + sizeof(struct sctphdr);
5764 if (SCTP_BUF_LEN(m) < offset) {
5765 if ((m = m_pullup(m, offset)) == NULL) {
5766 SCTP_STAT_INCR(sctps_hdrops);
5767 return (IPPROTO_DONE);
5770 ip = mtod(m, struct ip *);
5771 sh = (struct sctphdr *)((caddr_t)ip + off);
5772 tag = htonl(sh->v_tag);
5773 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
5774 m->m_pkthdr.flowid = flowid;
5775 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE_HASH);
5777 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
5778 sctp_queue_to_mcore(m, off, cpu_to_use);
5779 return (IPPROTO_DONE);
5782 sctp_input_with_port(m, off, 0);
5783 return (IPPROTO_DONE);