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 normally would
1600 * have hit case C. This in effect "extends" our
1601 * vtags in this collision case to be 64 bits. The
1602 * same collision could occur aka you get both vtag
1603 * and seq number the same twice in a row.. but is
1604 * much less likely. If it did happen then we would
1605 * proceed through and bring up the assoc.. we may
1606 * 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 if (l_stcb != NULL) {
2330 atomic_add_int(&l_stcb->asoc.refcnt, 1);
2331 SCTP_TCB_UNLOCK(l_stcb);
2334 SCTP_INP_RLOCK(l_inp);
2335 if (l_stcb != NULL) {
2336 SCTP_TCB_LOCK(l_stcb);
2337 atomic_subtract_int(&l_stcb->asoc.refcnt, 1);
2339 if (l_inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2340 SCTP_INP_RUNLOCK(l_inp);
2341 sctp_m_freem(m_sig);
2344 ep = &(*inp_p)->sctp_ep;
2345 /* which cookie is it? */
2346 if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
2347 (ep->current_secret_number != ep->last_secret_number)) {
2348 /* it's the old cookie */
2349 (void)sctp_hmac_m(SCTP_HMAC,
2350 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2351 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2353 /* it's the current cookie */
2354 (void)sctp_hmac_m(SCTP_HMAC,
2355 (uint8_t *)ep->secret_key[(int)ep->current_secret_number],
2356 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2358 /* get the signature */
2359 SCTP_INP_RUNLOCK(l_inp);
2360 sig = (uint8_t *)sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *)&tmp_sig);
2362 /* couldn't find signature */
2363 sctp_m_freem(m_sig);
2366 /* compare the received digest with the computed digest */
2367 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
2368 /* try the old cookie? */
2369 if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
2370 (ep->current_secret_number != ep->last_secret_number)) {
2371 /* compute digest with old */
2372 (void)sctp_hmac_m(SCTP_HMAC,
2373 (uint8_t *)ep->secret_key[(int)ep->last_secret_number],
2374 SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
2376 if (timingsafe_bcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
2384 * Now before we continue we must reconstruct our mbuf so that
2385 * normal processing of any other chunks will work.
2391 while (SCTP_BUF_NEXT(m_at) != NULL) {
2392 m_at = SCTP_BUF_NEXT(m_at);
2394 SCTP_BUF_NEXT(m_at) = m_sig;
2397 if (cookie_ok == 0) {
2398 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
2399 SCTPDBG(SCTP_DEBUG_INPUT2,
2400 "offset = %u, cookie_offset = %u, sig_offset = %u\n",
2401 (uint32_t)offset, cookie_offset, sig_offset);
2405 if (sctp_ticks_to_msecs(cookie->cookie_life) > SCTP_MAX_COOKIE_LIFE) {
2406 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: Invalid cookie lifetime\n");
2409 time_entered.tv_sec = cookie->time_entered.tv_sec;
2410 time_entered.tv_usec = cookie->time_entered.tv_usec;
2411 if ((time_entered.tv_sec < 0) ||
2412 (time_entered.tv_usec < 0) ||
2413 (time_entered.tv_usec >= 1000000)) {
2414 /* Invalid time stamp. Cookie must have been modified. */
2415 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: Invalid time stamp\n");
2418 (void)SCTP_GETTIME_TIMEVAL(&now);
2419 if (timevalcmp(&now, &time_entered, <)) {
2420 SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie generated in the future!\n");
2424 * Check the cookie timestamps to be sure it's not stale.
2425 * cookie_life is in ticks, so we convert to seconds.
2427 time_expires.tv_sec = time_entered.tv_sec + sctp_ticks_to_secs(cookie->cookie_life);
2428 time_expires.tv_usec = time_entered.tv_usec;
2429 if (timevalcmp(&now, &time_expires, >)) {
2430 /* cookie is stale! */
2431 struct mbuf *op_err;
2432 struct sctp_error_stale_cookie *cause;
2433 struct timeval diff;
2436 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
2437 0, M_NOWAIT, 1, MT_DATA);
2438 if (op_err == NULL) {
2443 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
2444 cause = mtod(op_err, struct sctp_error_stale_cookie *);
2445 cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
2446 cause->cause.length = htons(sizeof(struct sctp_error_stale_cookie));
2448 timevalsub(&diff, &time_expires);
2449 if ((uint32_t)diff.tv_sec > UINT32_MAX / 1000000) {
2450 staleness = UINT32_MAX;
2452 staleness = (uint32_t)diff.tv_sec * 1000000;
2454 if (UINT32_MAX - staleness >= (uint32_t)diff.tv_usec) {
2455 staleness += (uint32_t)diff.tv_usec;
2457 staleness = UINT32_MAX;
2459 cause->stale_time = htonl(staleness);
2460 sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
2461 mflowtype, mflowid, l_inp->fibnum,
2466 * Now we must see with the lookup address if we have an existing
2467 * asoc. This will only happen if we were in the COOKIE-WAIT state
2468 * and a INIT collided with us and somewhere the peer sent the
2469 * cookie on another address besides the single address our assoc
2470 * had for him. In this case we will have one of the tie-tags set at
2471 * least AND the address field in the cookie can be used to look it
2475 switch (cookie->addr_type) {
2477 case SCTP_IPV6_ADDRESS:
2478 memset(&sin6, 0, sizeof(sin6));
2479 sin6.sin6_family = AF_INET6;
2480 sin6.sin6_len = sizeof(sin6);
2481 sin6.sin6_port = sh->src_port;
2482 sin6.sin6_scope_id = cookie->scope_id;
2483 memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
2484 sizeof(sin6.sin6_addr.s6_addr));
2485 to = (struct sockaddr *)&sin6;
2489 case SCTP_IPV4_ADDRESS:
2490 memset(&sin, 0, sizeof(sin));
2491 sin.sin_family = AF_INET;
2492 sin.sin_len = sizeof(sin);
2493 sin.sin_port = sh->src_port;
2494 sin.sin_addr.s_addr = cookie->address[0];
2495 to = (struct sockaddr *)&sin;
2499 /* This should not happen */
2502 if (*stcb == NULL) {
2503 /* Yep, lets check */
2504 *stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
2505 if (*stcb == NULL) {
2507 * We should have only got back the same inp. If we
2508 * got back a different ep we have a problem. The
2509 * original findep got back l_inp and now
2511 if (l_inp != *inp_p) {
2512 SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
2515 if (*locked_tcb == NULL) {
2517 * In this case we found the assoc only
2518 * after we locked the create lock. This
2519 * means we are in a colliding case and we
2520 * must make sure that we unlock the tcb if
2521 * its one of the cases where we throw away
2522 * the incoming packets.
2524 *locked_tcb = *stcb;
2527 * We must also increment the inp ref count
2528 * since the ref_count flags was set when we
2529 * did not find the TCB, now we found it
2530 * which reduces the refcount.. we must
2531 * raise it back out to balance it all :-)
2533 SCTP_INP_INCR_REF((*stcb)->sctp_ep);
2534 if ((*stcb)->sctp_ep != l_inp) {
2535 SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
2536 (void *)(*stcb)->sctp_ep, (void *)l_inp);
2542 cookie_len -= SCTP_SIGNATURE_SIZE;
2543 if (*stcb == NULL) {
2544 /* this is the "normal" case... get a new TCB */
2545 *stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
2546 cookie, cookie_len, *inp_p,
2547 netp, to, ¬ification,
2548 auth_skipped, auth_offset, auth_len,
2552 /* this is abnormal... cookie-echo on existing TCB */
2553 had_a_existing_tcb = 1;
2554 *stcb = sctp_process_cookie_existing(m, iphlen, offset,
2556 cookie, cookie_len, *inp_p, *stcb, netp, to,
2557 ¬ification, auth_skipped, auth_offset, auth_len,
2560 if (*stcb == NULL) {
2565 if (*stcb == NULL) {
2566 /* still no TCB... must be bad cookie-echo */
2569 if (*netp != NULL) {
2570 (*netp)->flowtype = mflowtype;
2571 (*netp)->flowid = mflowid;
2574 * Ok, we built an association so confirm the address we sent the
2577 netl = sctp_findnet(*stcb, to);
2579 * This code should in theory NOT run but
2582 /* TSNH! Huh, why do I need to add this address here? */
2583 if (sctp_add_remote_addr(*stcb, to, NULL, port,
2584 SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
2587 netl = sctp_findnet(*stcb, to);
2590 if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
2591 netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
2592 (void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
2597 sctp_start_net_timers(*stcb);
2598 if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
2599 if (!had_a_existing_tcb ||
2600 (((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
2602 * If we have a NEW cookie or the connect never
2603 * reached the connected state during collision we
2604 * must do the TCP accept thing.
2606 struct socket *so, *oso;
2607 struct sctp_inpcb *inp;
2609 if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
2611 * For a restart we will keep the same
2612 * socket, no need to do anything. I THINK!!
2614 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2615 if (send_int_conf) {
2616 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2617 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2621 oso = (*inp_p)->sctp_socket;
2622 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2623 SCTP_TCB_UNLOCK((*stcb));
2624 CURVNET_SET(oso->so_vnet);
2625 so = sonewconn(oso, 0
2628 SCTP_TCB_LOCK((*stcb));
2629 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2632 struct mbuf *op_err;
2634 /* Too many sockets */
2635 SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
2636 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
2637 sctp_abort_association(*inp_p, NULL, m, iphlen,
2638 src, dst, sh, op_err,
2641 (void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
2642 SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
2645 inp = (struct sctp_inpcb *)so->so_pcb;
2646 SCTP_INP_INCR_REF(inp);
2648 * We add the unbound flag here so that if we get an
2649 * soabort() before we get the move_pcb done, we
2650 * will properly cleanup.
2652 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2653 SCTP_PCB_FLAGS_CONNECTED |
2654 SCTP_PCB_FLAGS_IN_TCPPOOL |
2655 SCTP_PCB_FLAGS_UNBOUND |
2656 (SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
2657 SCTP_PCB_FLAGS_DONT_WAKE);
2658 inp->sctp_features = (*inp_p)->sctp_features;
2659 inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
2660 inp->sctp_socket = so;
2661 inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
2662 inp->max_cwnd = (*inp_p)->max_cwnd;
2663 inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
2664 inp->ecn_supported = (*inp_p)->ecn_supported;
2665 inp->prsctp_supported = (*inp_p)->prsctp_supported;
2666 inp->auth_supported = (*inp_p)->auth_supported;
2667 inp->asconf_supported = (*inp_p)->asconf_supported;
2668 inp->reconfig_supported = (*inp_p)->reconfig_supported;
2669 inp->nrsack_supported = (*inp_p)->nrsack_supported;
2670 inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
2671 inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
2672 inp->sctp_context = (*inp_p)->sctp_context;
2673 inp->local_strreset_support = (*inp_p)->local_strreset_support;
2674 inp->fibnum = (*inp_p)->fibnum;
2676 * copy in the authentication parameters from the
2679 if (inp->sctp_ep.local_hmacs)
2680 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2681 inp->sctp_ep.local_hmacs =
2682 sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
2683 if (inp->sctp_ep.local_auth_chunks)
2684 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2685 inp->sctp_ep.local_auth_chunks =
2686 sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
2689 * Now we must move it from one hash table to
2690 * another and get the tcb in the right place.
2694 * This is where the one-2-one socket is put into
2695 * the accept state waiting for the accept!
2698 SCTP_ADD_SUBSTATE(*stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
2700 sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
2702 atomic_add_int(&(*stcb)->asoc.refcnt, 1);
2703 SCTP_TCB_UNLOCK((*stcb));
2705 sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
2707 SCTP_TCB_LOCK((*stcb));
2708 atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
2711 * now we must check to see if we were aborted while
2712 * the move was going on and the lock/unlock
2715 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
2717 * yep it was, we leave the assoc attached
2718 * to the socket since the sctp_inpcb_free()
2719 * call will send an abort for us.
2721 SCTP_INP_DECR_REF(inp);
2724 SCTP_INP_DECR_REF(inp);
2725 /* Switch over to the new guy */
2727 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2728 if (send_int_conf) {
2729 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2730 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2734 * Pull it from the incomplete queue and wake the
2742 sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2744 if (send_int_conf) {
2745 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
2746 (*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
2752 sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
2753 struct sctp_tcb *stcb, struct sctp_nets *net)
2755 /* cp must not be used, others call this without a c-ack :-) */
2756 struct sctp_association *asoc;
2757 struct sctp_tmit_chunk *chk;
2759 SCTPDBG(SCTP_DEBUG_INPUT2,
2760 "sctp_handle_cookie_ack: handling COOKIE-ACK\n");
2761 if ((stcb == NULL) || (net == NULL)) {
2766 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
2767 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
2768 asoc->overall_error_count,
2770 SCTP_FROM_SCTP_INPUT,
2773 asoc->overall_error_count = 0;
2774 sctp_stop_all_cookie_timers(stcb);
2775 /* process according to association state */
2776 if (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) {
2777 /* state change only needed when I am in right state */
2778 SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
2779 SCTP_SET_STATE(stcb, SCTP_STATE_OPEN);
2780 sctp_start_net_timers(stcb);
2781 if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
2782 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
2783 stcb->sctp_ep, stcb, NULL);
2786 SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
2787 SCTP_STAT_INCR_GAUGE32(sctps_currestab);
2788 if (asoc->overall_error_count == 0) {
2789 sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered,
2790 SCTP_RTT_FROM_NON_DATA);
2792 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
2793 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
2794 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
2795 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
2796 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
2797 if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
2798 soisconnected(stcb->sctp_socket);
2802 * since we did not send a HB make sure we don't double
2805 net->hb_responded = 1;
2807 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
2809 * We don't need to do the asconf thing, nor hb or
2810 * autoclose if the socket is closed.
2815 sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
2818 if (stcb->asoc.sctp_autoclose_ticks &&
2819 sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
2820 sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
2821 stcb->sctp_ep, stcb, NULL);
2824 * send ASCONF if parameters are pending and ASCONFs are
2825 * allowed (eg. addresses changed when init/cookie echo were
2828 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
2829 (stcb->asoc.asconf_supported == 1) &&
2830 (!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
2831 #ifdef SCTP_TIMER_BASED_ASCONF
2832 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
2833 stcb->sctp_ep, stcb,
2834 stcb->asoc.primary_destination);
2836 sctp_send_asconf(stcb, stcb->asoc.primary_destination,
2837 SCTP_ADDR_NOT_LOCKED);
2842 /* Toss the cookie if I can */
2843 sctp_toss_old_cookies(stcb, asoc);
2844 /* Restart the timer if we have pending data */
2845 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
2846 if (chk->whoTo != NULL) {
2851 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
2856 sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
2857 struct sctp_tcb *stcb)
2859 struct sctp_nets *net;
2860 struct sctp_tmit_chunk *lchk;
2861 struct sctp_ecne_chunk bkup;
2862 uint8_t override_bit;
2863 uint32_t tsn, window_data_tsn;
2865 unsigned int pkt_cnt;
2867 len = ntohs(cp->ch.chunk_length);
2868 if (len == sizeof(struct old_sctp_ecne_chunk)) {
2869 /* Its the old format */
2870 memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
2871 bkup.num_pkts_since_cwr = htonl(1);
2874 SCTP_STAT_INCR(sctps_recvecne);
2875 tsn = ntohl(cp->tsn);
2876 pkt_cnt = ntohl(cp->num_pkts_since_cwr);
2877 lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
2879 window_data_tsn = stcb->asoc.sending_seq - 1;
2881 window_data_tsn = lchk->rec.data.tsn;
2884 /* Find where it was sent to if possible. */
2886 TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
2887 if (lchk->rec.data.tsn == tsn) {
2889 net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
2892 if (SCTP_TSN_GT(lchk->rec.data.tsn, tsn)) {
2898 * What to do. A previous send of a CWR was possibly lost.
2899 * See how old it is, we may have it marked on the actual
2902 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2903 if (tsn == net->last_cwr_tsn) {
2904 /* Found him, send it off */
2910 * If we reach here, we need to send a special CWR
2911 * that says hey, we did this a long time ago and
2912 * you lost the response.
2914 net = TAILQ_FIRST(&stcb->asoc.nets);
2919 override_bit = SCTP_CWR_REDUCE_OVERRIDE;
2926 if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
2927 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2929 * JRS - Use the congestion control given in the pluggable
2932 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
2934 * We reduce once every RTT. So we will only lower cwnd at
2935 * the next sending seq i.e. the window_data_tsn
2937 net->cwr_window_tsn = window_data_tsn;
2938 net->ecn_ce_pkt_cnt += pkt_cnt;
2939 net->lost_cnt = pkt_cnt;
2940 net->last_cwr_tsn = tsn;
2942 override_bit |= SCTP_CWR_IN_SAME_WINDOW;
2943 if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
2944 ((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
2946 * Another loss in the same window update how many
2947 * marks/packets lost we have had.
2951 if (pkt_cnt > net->lost_cnt) {
2952 /* Should be the case */
2953 cnt = (pkt_cnt - net->lost_cnt);
2954 net->ecn_ce_pkt_cnt += cnt;
2956 net->lost_cnt = pkt_cnt;
2957 net->last_cwr_tsn = tsn;
2959 * Most CC functions will ignore this call, since we
2960 * are in-window yet of the initial CE the peer saw.
2962 stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
2966 * We always send a CWR this way if our previous one was lost our
2967 * peer will get an update, or if it is not time again to reduce we
2968 * still get the cwr to the peer. Note we set the override when we
2969 * could not find the TSN on the chunk or the destination network.
2971 sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
2975 sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
2978 * Here we get a CWR from the peer. We must look in the outqueue and
2979 * make sure that we have a covered ECNE in the control chunk part.
2982 struct sctp_tmit_chunk *chk, *nchk;
2983 struct sctp_ecne_chunk *ecne;
2987 cwr_tsn = ntohl(cp->tsn);
2988 override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
2989 TAILQ_FOREACH_SAFE(chk, &stcb->asoc.control_send_queue, sctp_next, nchk) {
2990 if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
2993 if ((override == 0) && (chk->whoTo != net)) {
2994 /* Must be from the right src unless override is set */
2997 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
2998 if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
2999 /* this covers this ECNE, we can remove it */
3000 stcb->asoc.ecn_echo_cnt_onq--;
3001 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
3003 stcb->asoc.ctrl_queue_cnt--;
3004 sctp_m_freem(chk->data);
3006 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3007 if (override == 0) {
3015 sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
3016 struct sctp_tcb *stcb, struct sctp_nets *net)
3019 SCTPDBG(SCTP_DEBUG_INPUT2,
3020 "sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
3024 /* process according to association state */
3025 if (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
3026 /* unexpected SHUTDOWN-COMPLETE... so ignore... */
3027 SCTPDBG(SCTP_DEBUG_INPUT2,
3028 "sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
3029 SCTP_TCB_UNLOCK(stcb);
3032 /* notify upper layer protocol */
3033 if (stcb->sctp_socket) {
3034 sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
3037 if (!TAILQ_EMPTY(&stcb->asoc.send_queue) ||
3038 !TAILQ_EMPTY(&stcb->asoc.sent_queue) ||
3039 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED)) {
3040 panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
3043 /* stop the timer */
3044 sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
3045 SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
3046 SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
3048 SCTPDBG(SCTP_DEBUG_INPUT2,
3049 "sctp_handle_shutdown_complete: calls free-asoc\n");
3050 (void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
3051 SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
3056 process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
3057 struct sctp_nets *net, uint8_t flg)
3059 switch (desc->chunk_type) {
3062 /* find the tsn to resend (possibly) */
3065 struct sctp_tmit_chunk *tp1;
3067 tsn = ntohl(desc->tsn_ifany);
3068 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3069 if (tp1->rec.data.tsn == tsn) {
3073 if (SCTP_TSN_GT(tp1->rec.data.tsn, tsn)) {
3081 * Do it the other way , aka without paying
3082 * attention to queue seq order.
3084 SCTP_STAT_INCR(sctps_pdrpdnfnd);
3085 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3086 if (tp1->rec.data.tsn == tsn) {
3093 SCTP_STAT_INCR(sctps_pdrptsnnf);
3095 if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
3096 if (((flg & SCTP_BADCRC) == 0) &&
3097 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3100 if ((stcb->asoc.peers_rwnd == 0) &&
3101 ((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
3102 SCTP_STAT_INCR(sctps_pdrpdiwnp);
3105 if (stcb->asoc.peers_rwnd == 0 &&
3106 (flg & SCTP_FROM_MIDDLE_BOX)) {
3107 SCTP_STAT_INCR(sctps_pdrpdizrw);
3110 if ((uint32_t)SCTP_BUF_LEN(tp1->data) <
3111 SCTP_DATA_CHUNK_OVERHEAD(stcb) + SCTP_NUM_DB_TO_VERIFY) {
3112 /* Payload not matching. */
3113 SCTP_STAT_INCR(sctps_pdrpbadd);
3116 if (memcmp(mtod(tp1->data, caddr_t)+SCTP_DATA_CHUNK_OVERHEAD(stcb),
3117 desc->data_bytes, SCTP_NUM_DB_TO_VERIFY) != 0) {
3118 /* Payload not matching. */
3119 SCTP_STAT_INCR(sctps_pdrpbadd);
3124 * this guy had a RTO calculation
3125 * pending on it, cancel it
3127 if (tp1->whoTo->rto_needed == 0) {
3128 tp1->whoTo->rto_needed = 1;
3132 SCTP_STAT_INCR(sctps_pdrpmark);
3133 if (tp1->sent != SCTP_DATAGRAM_RESEND)
3134 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3136 * mark it as if we were doing a FR, since
3137 * we will be getting gap ack reports behind
3138 * the info from the router.
3140 tp1->rec.data.doing_fast_retransmit = 1;
3142 * mark the tsn with what sequences can
3145 if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
3146 tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
3148 tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.tsn;
3151 /* restart the timer */
3152 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3154 SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
3155 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
3158 /* fix counts and things */
3159 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
3160 sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
3161 tp1->whoTo->flight_size,
3163 (uint32_t)(uintptr_t)stcb,
3166 if (tp1->sent < SCTP_DATAGRAM_RESEND) {
3167 sctp_flight_size_decrease(tp1);
3168 sctp_total_flight_decrease(stcb, tp1);
3170 tp1->sent = SCTP_DATAGRAM_RESEND;
3176 TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
3177 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3180 TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
3182 if (tp1->sent == SCTP_DATAGRAM_RESEND)
3185 if (audit != stcb->asoc.sent_queue_retran_cnt) {
3186 SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
3187 audit, stcb->asoc.sent_queue_retran_cnt);
3188 #ifndef SCTP_AUDITING_ENABLED
3189 stcb->asoc.sent_queue_retran_cnt = audit;
3197 struct sctp_tmit_chunk *asconf;
3199 TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
3201 if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
3206 if (asconf->sent != SCTP_DATAGRAM_RESEND)
3207 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3208 asconf->sent = SCTP_DATAGRAM_RESEND;
3209 asconf->snd_count--;
3213 case SCTP_INITIATION:
3214 /* resend the INIT */
3215 stcb->asoc.dropped_special_cnt++;
3216 if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
3218 * If we can get it in, in a few attempts we do
3219 * this, otherwise we let the timer fire.
3221 sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
3223 SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
3224 sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
3227 case SCTP_SELECTIVE_ACK:
3228 case SCTP_NR_SELECTIVE_ACK:
3229 /* resend the sack */
3230 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
3232 case SCTP_HEARTBEAT_REQUEST:
3233 /* resend a demand HB */
3234 if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
3236 * Only retransmit if we KNOW we wont destroy the
3239 sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
3243 sctp_send_shutdown(stcb, net);
3245 case SCTP_SHUTDOWN_ACK:
3246 sctp_send_shutdown_ack(stcb, net);
3248 case SCTP_COOKIE_ECHO:
3250 struct sctp_tmit_chunk *cookie;
3253 TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
3255 if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
3260 if (cookie->sent != SCTP_DATAGRAM_RESEND)
3261 sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
3262 cookie->sent = SCTP_DATAGRAM_RESEND;
3263 sctp_stop_all_cookie_timers(stcb);
3267 case SCTP_COOKIE_ACK:
3268 sctp_send_cookie_ack(stcb);
3270 case SCTP_ASCONF_ACK:
3271 /* resend last asconf ack */
3272 sctp_send_asconf_ack(stcb);
3274 case SCTP_IFORWARD_CUM_TSN:
3275 case SCTP_FORWARD_CUM_TSN:
3276 send_forward_tsn(stcb, &stcb->asoc);
3278 /* can't do anything with these */
3279 case SCTP_PACKET_DROPPED:
3280 case SCTP_INITIATION_ACK: /* this should not happen */
3281 case SCTP_HEARTBEAT_ACK:
3282 case SCTP_ABORT_ASSOCIATION:
3283 case SCTP_OPERATION_ERROR:
3284 case SCTP_SHUTDOWN_COMPLETE:
3294 sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3300 * We set things to 0xffffffff since this is the last delivered
3301 * sequence and we will be sending in 0 after the reset.
3304 if (number_entries) {
3305 for (i = 0; i < number_entries; i++) {
3306 temp = ntohs(list[i]);
3307 if (temp >= stcb->asoc.streamincnt) {
3310 stcb->asoc.strmin[temp].last_mid_delivered = 0xffffffff;
3314 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3315 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3318 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3322 sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3327 if (number_entries > 0) {
3328 for (i = 0; i < number_entries; i++) {
3329 temp = ntohs(list[i]);
3330 if (temp >= stcb->asoc.streamoutcnt) {
3331 /* no such stream */
3334 stcb->asoc.strmout[temp].next_mid_ordered = 0;
3335 stcb->asoc.strmout[temp].next_mid_unordered = 0;
3338 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3339 stcb->asoc.strmout[i].next_mid_ordered = 0;
3340 stcb->asoc.strmout[i].next_mid_unordered = 0;
3343 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
3347 sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t *list)
3352 if (number_entries > 0) {
3353 for (i = 0; i < number_entries; i++) {
3354 temp = ntohs(list[i]);
3355 if (temp >= stcb->asoc.streamoutcnt) {
3356 /* no such stream */
3359 stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
3362 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3363 stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
3368 struct sctp_stream_reset_request *
3369 sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
3371 struct sctp_association *asoc;
3372 struct sctp_chunkhdr *ch;
3373 struct sctp_stream_reset_request *r;
3374 struct sctp_tmit_chunk *chk;
3378 chk = asoc->str_reset;
3379 if (TAILQ_EMPTY(&asoc->control_send_queue) ||
3381 asoc->stream_reset_outstanding = 0;
3384 if (chk->data == NULL) {
3388 /* he wants a copy of the chk pointer */
3391 clen = chk->send_size;
3392 ch = mtod(chk->data, struct sctp_chunkhdr *);
3393 r = (struct sctp_stream_reset_request *)(ch + 1);
3394 if (ntohl(r->request_seq) == seq) {
3398 len = SCTP_SIZE32(ntohs(r->ph.param_length));
3399 if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
3400 /* move to the next one, there can only be a max of two */
3401 r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
3402 if (ntohl(r->request_seq) == seq) {
3406 /* that seq is not here */
3411 sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
3413 struct sctp_association *asoc;
3414 struct sctp_tmit_chunk *chk;
3417 chk = asoc->str_reset;
3421 asoc->str_reset = NULL;
3422 sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
3423 NULL, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
3424 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3425 asoc->ctrl_queue_cnt--;
3427 sctp_m_freem(chk->data);
3430 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
3434 sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
3435 uint32_t seq, uint32_t action,
3436 struct sctp_stream_reset_response *respin)
3440 struct sctp_association *asoc = &stcb->asoc;
3441 struct sctp_tmit_chunk *chk;
3442 struct sctp_stream_reset_request *req_param;
3443 struct sctp_stream_reset_out_request *req_out_param;
3444 struct sctp_stream_reset_in_request *req_in_param;
3445 uint32_t number_entries;
3447 if (asoc->stream_reset_outstanding == 0) {
3451 if (seq == stcb->asoc.str_reset_seq_out) {
3452 req_param = sctp_find_stream_reset(stcb, seq, &chk);
3453 if (req_param != NULL) {
3454 stcb->asoc.str_reset_seq_out++;
3455 type = ntohs(req_param->ph.param_type);
3456 lparam_len = ntohs(req_param->ph.param_length);
3457 if (type == SCTP_STR_RESET_OUT_REQUEST) {
3460 req_out_param = (struct sctp_stream_reset_out_request *)req_param;
3461 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
3462 asoc->stream_reset_out_is_outstanding = 0;
3463 if (asoc->stream_reset_outstanding)
3464 asoc->stream_reset_outstanding--;
3465 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3467 sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
3468 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3469 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3470 } else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
3472 * Set it up so we don't stop
3475 asoc->stream_reset_outstanding++;
3476 stcb->asoc.str_reset_seq_out--;
3477 asoc->stream_reset_out_is_outstanding = 1;
3480 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3482 if (no_clear == 0) {
3483 sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
3485 } else if (type == SCTP_STR_RESET_IN_REQUEST) {
3486 req_in_param = (struct sctp_stream_reset_in_request *)req_param;
3487 number_entries = (lparam_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
3488 if (asoc->stream_reset_outstanding)
3489 asoc->stream_reset_outstanding--;
3490 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3491 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
3492 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3493 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3494 sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
3495 number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
3497 } else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
3498 /* Ok we now may have more streams */
3501 num_stream = stcb->asoc.strm_pending_add_size;
3502 if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
3504 num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
3506 stcb->asoc.strm_pending_add_size = 0;
3507 if (asoc->stream_reset_outstanding)
3508 asoc->stream_reset_outstanding--;
3509 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3510 /* Put the new streams into effect */
3513 for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
3514 asoc->strmout[i].state = SCTP_STREAM_OPEN;
3516 asoc->streamoutcnt += num_stream;
3517 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3518 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3519 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3520 SCTP_STREAM_CHANGE_DENIED);
3522 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3523 SCTP_STREAM_CHANGE_FAILED);
3525 } else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
3526 if (asoc->stream_reset_outstanding)
3527 asoc->stream_reset_outstanding--;
3528 if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3529 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3530 SCTP_STREAM_CHANGE_DENIED);
3531 } else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
3532 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
3533 SCTP_STREAM_CHANGE_FAILED);
3535 } else if (type == SCTP_STR_RESET_TSN_REQUEST) {
3537 * a) Adopt the new in tsn.
3539 * c) Adopt the new out-tsn
3541 struct sctp_stream_reset_response_tsn *resp;
3542 struct sctp_forward_tsn_chunk fwdtsn;
3545 if (respin == NULL) {
3549 if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
3552 if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
3553 resp = (struct sctp_stream_reset_response_tsn *)respin;
3554 asoc->stream_reset_outstanding--;
3555 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3556 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3557 fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
3558 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3562 stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
3563 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3564 sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3567 stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
3568 stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
3569 memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
3571 stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
3572 memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
3574 stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
3575 stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
3577 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3578 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3579 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
3580 } else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
3581 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3582 SCTP_ASSOC_RESET_DENIED);
3584 sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
3585 SCTP_ASSOC_RESET_FAILED);
3588 /* get rid of the request and get the request flags */
3589 if (asoc->stream_reset_outstanding == 0) {
3590 sctp_clean_up_stream_reset(stcb);
3594 if (asoc->stream_reset_outstanding == 0) {
3595 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3601 sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
3602 struct sctp_tmit_chunk *chk,
3603 struct sctp_stream_reset_in_request *req, int trunc)
3611 * peer wants me to send a str-reset to him for my outgoing seq's if
3614 struct sctp_association *asoc = &stcb->asoc;
3616 seq = ntohl(req->request_seq);
3617 if (asoc->str_reset_seq_in == seq) {
3618 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3619 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3620 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3622 /* Can't do it, since they exceeded our buffer size */
3623 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3624 } else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
3625 len = ntohs(req->ph.param_length);
3626 number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
3627 if (number_entries) {
3628 for (i = 0; i < number_entries; i++) {
3629 temp = ntohs(req->list_of_streams[i]);
3630 if (temp >= stcb->asoc.streamoutcnt) {
3631 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3634 req->list_of_streams[i] = temp;
3636 for (i = 0; i < number_entries; i++) {
3637 if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
3638 stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
3643 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3644 if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
3645 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
3648 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3650 /* Can't do it, since we have sent one out */
3651 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3654 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3655 asoc->str_reset_seq_in++;
3656 } else if (asoc->str_reset_seq_in - 1 == seq) {
3657 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3658 } else if (asoc->str_reset_seq_in - 2 == seq) {
3659 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3661 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3663 sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
3667 sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
3668 struct sctp_tmit_chunk *chk,
3669 struct sctp_stream_reset_tsn_request *req)
3671 /* reset all in and out and update the tsn */
3673 * A) reset my str-seq's on in and out. B) Select a receive next,
3674 * and set cum-ack to it. Also process this selected number as a
3675 * fwd-tsn as well. C) set in the response my next sending seq.
3677 struct sctp_forward_tsn_chunk fwdtsn;
3678 struct sctp_association *asoc = &stcb->asoc;
3682 seq = ntohl(req->request_seq);
3683 if (asoc->str_reset_seq_in == seq) {
3684 asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
3685 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3686 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3688 fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
3689 fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
3690 fwdtsn.ch.chunk_flags = 0;
3691 fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
3692 sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
3696 asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
3697 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
3698 sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
3700 asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
3701 asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
3702 memset(asoc->mapping_array, 0, asoc->mapping_array_size);
3703 asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
3704 memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
3705 atomic_add_int(&asoc->sending_seq, 1);
3706 /* save off historical data for retrans */
3707 asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
3708 asoc->last_sending_seq[0] = asoc->sending_seq;
3709 asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
3710 asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
3711 sctp_reset_out_streams(stcb, 0, (uint16_t *)NULL);
3712 sctp_reset_in_stream(stcb, 0, (uint16_t *)NULL);
3713 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3714 sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
3716 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3717 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3718 asoc->str_reset_seq_in++;
3719 } else if (asoc->str_reset_seq_in - 1 == seq) {
3720 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
3721 asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
3722 } else if (asoc->str_reset_seq_in - 2 == seq) {
3723 sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
3724 asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
3726 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3732 sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
3733 struct sctp_tmit_chunk *chk,
3734 struct sctp_stream_reset_out_request *req, int trunc)
3737 int number_entries, len;
3738 struct sctp_association *asoc = &stcb->asoc;
3740 seq = ntohl(req->request_seq);
3742 /* now if its not a duplicate we process it */
3743 if (asoc->str_reset_seq_in == seq) {
3744 len = ntohs(req->ph.param_length);
3745 number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
3747 * the sender is resetting, handle the list issue.. we must
3748 * a) verify if we can do the reset, if so no problem b) If
3749 * we can't do the reset we must copy the request. c) queue
3750 * it, and setup the data in processor to trigger it off
3751 * when needed and dequeue all the queued data.
3753 tsn = ntohl(req->send_reset_at_tsn);
3755 /* move the reset action back one */
3756 asoc->last_reset_action[1] = asoc->last_reset_action[0];
3757 if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
3758 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3760 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3761 } else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
3762 /* we can do it now */
3763 sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
3764 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3767 * we must queue it up and thus wait for the TSN's
3768 * to arrive that are at or before tsn
3770 struct sctp_stream_reset_list *liste;
3773 siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
3774 SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
3775 siz, SCTP_M_STRESET);
3776 if (liste == NULL) {
3777 /* gak out of memory */
3778 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3779 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3784 liste->number_entries = number_entries;
3785 memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
3786 TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
3787 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
3789 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3790 asoc->str_reset_seq_in++;
3791 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3793 * one seq back, just echo back last action since my
3794 * response was lost.
3796 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3797 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3799 * two seq back, just echo back last action since my
3800 * response was lost.
3802 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3804 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3809 sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3810 struct sctp_stream_reset_add_strm *str_add)
3813 * Peer is requesting to add more streams. If its within our
3814 * max-streams we will allow it.
3816 uint32_t num_stream, i;
3818 struct sctp_association *asoc = &stcb->asoc;
3819 struct sctp_queued_to_read *ctl, *nctl;
3821 /* Get the number. */
3822 seq = ntohl(str_add->request_seq);
3823 num_stream = ntohs(str_add->number_of_streams);
3824 /* Now what would be the new total? */
3825 if (asoc->str_reset_seq_in == seq) {
3826 num_stream += stcb->asoc.streamincnt;
3827 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3828 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3829 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3830 } else if ((num_stream > stcb->asoc.max_inbound_streams) ||
3831 (num_stream > 0xffff)) {
3832 /* We must reject it they ask for to many */
3834 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3836 /* Ok, we can do that :-) */
3837 struct sctp_stream_in *oldstrm;
3839 /* save off the old */
3840 oldstrm = stcb->asoc.strmin;
3841 SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
3842 (num_stream * sizeof(struct sctp_stream_in)),
3844 if (stcb->asoc.strmin == NULL) {
3845 stcb->asoc.strmin = oldstrm;
3848 /* copy off the old data */
3849 for (i = 0; i < stcb->asoc.streamincnt; i++) {
3850 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3851 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3852 stcb->asoc.strmin[i].sid = i;
3853 stcb->asoc.strmin[i].last_mid_delivered = oldstrm[i].last_mid_delivered;
3854 stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
3855 stcb->asoc.strmin[i].pd_api_started = oldstrm[i].pd_api_started;
3856 /* now anything on those queues? */
3857 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next_instrm, nctl) {
3858 TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next_instrm);
3859 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next_instrm);
3861 TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].uno_inqueue, next_instrm, nctl) {
3862 TAILQ_REMOVE(&oldstrm[i].uno_inqueue, ctl, next_instrm);
3863 TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].uno_inqueue, ctl, next_instrm);
3866 /* Init the new streams */
3867 for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
3868 TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
3869 TAILQ_INIT(&stcb->asoc.strmin[i].uno_inqueue);
3870 stcb->asoc.strmin[i].sid = i;
3871 stcb->asoc.strmin[i].last_mid_delivered = 0xffffffff;
3872 stcb->asoc.strmin[i].pd_api_started = 0;
3873 stcb->asoc.strmin[i].delivery_started = 0;
3875 SCTP_FREE(oldstrm, SCTP_M_STRMI);
3876 /* update the size */
3877 stcb->asoc.streamincnt = num_stream;
3878 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3879 sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
3881 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3882 asoc->str_reset_seq_in++;
3883 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3885 * one seq back, just echo back last action since my
3886 * response was lost.
3888 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3889 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3891 * two seq back, just echo back last action since my
3892 * response was lost.
3894 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3896 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3901 sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
3902 struct sctp_stream_reset_add_strm *str_add)
3905 * Peer is requesting to add more streams. If its within our
3906 * max-streams we will allow it.
3908 uint16_t num_stream;
3910 struct sctp_association *asoc = &stcb->asoc;
3912 /* Get the number. */
3913 seq = ntohl(str_add->request_seq);
3914 num_stream = ntohs(str_add->number_of_streams);
3915 /* Now what would be the new total? */
3916 if (asoc->str_reset_seq_in == seq) {
3917 stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
3918 if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
3919 asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3920 } else if (stcb->asoc.stream_reset_outstanding) {
3921 /* We must reject it we have something pending */
3922 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
3924 /* Ok, we can do that :-) */
3927 mychk = stcb->asoc.streamoutcnt;
3928 mychk += num_stream;
3929 if (mychk < 0x10000) {
3930 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
3931 if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
3932 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3935 stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
3938 sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
3939 asoc->str_reset_seq_in++;
3940 } else if ((asoc->str_reset_seq_in - 1) == seq) {
3942 * one seq back, just echo back last action since my
3943 * response was lost.
3945 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
3946 } else if ((asoc->str_reset_seq_in - 2) == seq) {
3948 * two seq back, just echo back last action since my
3949 * response was lost.
3951 sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
3953 sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
3958 __attribute__((noinline))
3961 sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
3962 struct sctp_chunkhdr *ch_req)
3964 uint16_t remaining_length, param_len, ptype;
3965 struct sctp_paramhdr pstore;
3966 uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
3970 struct sctp_tmit_chunk *chk;
3971 struct sctp_chunkhdr *ch;
3972 struct sctp_paramhdr *ph;
3976 /* now it may be a reset or a reset-response */
3977 remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
3979 /* setup for adding the response */
3980 sctp_alloc_a_chunk(stcb, chk);
3984 chk->copy_by_ref = 0;
3985 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
3986 chk->rec.chunk_id.can_take_data = 0;
3988 chk->asoc = &stcb->asoc;
3989 chk->no_fr_allowed = 0;
3990 chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
3991 chk->book_size_scale = 0;
3992 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
3993 if (chk->data == NULL) {
3996 sctp_m_freem(chk->data);
3999 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
4002 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
4004 /* setup chunk parameters */
4005 chk->sent = SCTP_DATAGRAM_UNSENT;
4009 ch = mtod(chk->data, struct sctp_chunkhdr *);
4010 ch->chunk_type = SCTP_STREAM_RESET;
4011 ch->chunk_flags = 0;
4012 ch->chunk_length = htons(chk->send_size);
4013 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
4014 offset += sizeof(struct sctp_chunkhdr);
4015 while (remaining_length >= sizeof(struct sctp_paramhdr)) {
4016 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *)&pstore);
4021 param_len = ntohs(ph->param_length);
4022 if ((param_len > remaining_length) ||
4023 (param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
4024 /* bad parameter length */
4027 ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
4028 (uint8_t *)&cstore);
4033 ptype = ntohs(ph->param_type);
4035 if (param_len > sizeof(cstore)) {
4040 if (num_param > SCTP_MAX_RESET_PARAMS) {
4041 /* hit the max of parameters already sorry.. */
4044 if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
4045 struct sctp_stream_reset_out_request *req_out;
4047 if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
4050 req_out = (struct sctp_stream_reset_out_request *)ph;
4052 if (stcb->asoc.stream_reset_outstanding) {
4053 seq = ntohl(req_out->response_seq);
4054 if (seq == stcb->asoc.str_reset_seq_out) {
4056 (void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
4059 sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
4060 } else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
4061 struct sctp_stream_reset_add_strm *str_add;
4063 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4066 str_add = (struct sctp_stream_reset_add_strm *)ph;
4068 sctp_handle_str_reset_add_strm(stcb, chk, str_add);
4069 } else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
4070 struct sctp_stream_reset_add_strm *str_add;
4072 if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
4075 str_add = (struct sctp_stream_reset_add_strm *)ph;
4077 sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
4078 } else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
4079 struct sctp_stream_reset_in_request *req_in;
4082 req_in = (struct sctp_stream_reset_in_request *)ph;
4083 sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
4084 } else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
4085 struct sctp_stream_reset_tsn_request *req_tsn;
4088 req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
4089 if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
4091 goto strres_nochunk;
4095 } else if (ptype == SCTP_STR_RESET_RESPONSE) {
4096 struct sctp_stream_reset_response *resp;
4099 if (param_len < sizeof(struct sctp_stream_reset_response)) {
4102 resp = (struct sctp_stream_reset_response *)ph;
4103 seq = ntohl(resp->response_seq);
4104 result = ntohl(resp->result);
4105 if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
4107 goto strres_nochunk;
4112 offset += SCTP_SIZE32(param_len);
4113 if (remaining_length >= SCTP_SIZE32(param_len)) {
4114 remaining_length -= SCTP_SIZE32(param_len);
4116 remaining_length = 0;
4120 /* we have no response free the stuff */
4121 goto strres_nochunk;
4123 /* ok we have a chunk to link in */
4124 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
4127 stcb->asoc.ctrl_queue_cnt++;
4132 * Handle a router or endpoints report of a packet loss, there are two ways
4133 * to handle this, either we get the whole packet and must disect it
4134 * ourselves (possibly with truncation and or corruption) or it is a summary
4135 * from a middle box that did the disecting for us.
4138 sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
4139 struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
4141 struct sctp_chunk_desc desc;
4142 struct sctp_chunkhdr *chk_hdr;
4143 struct sctp_data_chunk *data_chunk;
4144 struct sctp_idata_chunk *idata_chunk;
4145 uint32_t bottle_bw, on_queue;
4146 uint32_t offset, chk_len;
4147 uint16_t pktdrp_len;
4148 uint8_t pktdrp_flags;
4150 KASSERT(sizeof(struct sctp_pktdrop_chunk) <= limit,
4151 ("PKTDROP chunk too small"));
4152 pktdrp_flags = cp->ch.chunk_flags;
4153 pktdrp_len = ntohs(cp->ch.chunk_length);
4154 KASSERT(limit <= pktdrp_len, ("Inconsistent limit"));
4155 if (pktdrp_flags & SCTP_PACKET_TRUNCATED) {
4156 if (ntohs(cp->trunc_len) <= pktdrp_len - sizeof(struct sctp_pktdrop_chunk)) {
4157 /* The peer plays games with us. */
4161 limit -= sizeof(struct sctp_pktdrop_chunk);
4163 if (offset == limit) {
4164 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4165 SCTP_STAT_INCR(sctps_pdrpbwrpt);
4167 } else if (offset + sizeof(struct sctphdr) > limit) {
4168 /* Only a partial SCTP common header. */
4169 SCTP_STAT_INCR(sctps_pdrpcrupt);
4172 /* XXX: Check embedded SCTP common header. */
4173 offset += sizeof(struct sctphdr);
4175 /* Now parse through the chunks themselves. */
4176 while (offset < limit) {
4177 if (offset + sizeof(struct sctp_chunkhdr) > limit) {
4178 SCTP_STAT_INCR(sctps_pdrpcrupt);
4181 chk_hdr = (struct sctp_chunkhdr *)(cp->data + offset);
4182 desc.chunk_type = chk_hdr->chunk_type;
4183 /* get amount we need to move */
4184 chk_len = (uint32_t)ntohs(chk_hdr->chunk_length);
4185 if (chk_len < sizeof(struct sctp_chunkhdr)) {
4186 /* Someone is lying... */
4189 if (desc.chunk_type == SCTP_DATA) {
4190 if (stcb->asoc.idata_supported) {
4191 /* Some is playing games with us. */
4194 if (chk_len <= sizeof(struct sctp_data_chunk)) {
4195 /* Some is playing games with us. */
4198 if (chk_len < sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4200 * Not enough data bytes available in the
4203 SCTP_STAT_INCR(sctps_pdrpnedat);
4206 if (offset + sizeof(struct sctp_data_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4207 /* Not enough data in buffer. */
4210 data_chunk = (struct sctp_data_chunk *)(cp->data + offset);
4211 memcpy(desc.data_bytes, data_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4212 desc.tsn_ifany = data_chunk->dp.tsn;
4213 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4214 SCTP_STAT_INCR(sctps_pdrpmbda);
4216 } else if (desc.chunk_type == SCTP_IDATA) {
4217 if (!stcb->asoc.idata_supported) {
4218 /* Some is playing games with us. */
4221 if (chk_len <= sizeof(struct sctp_idata_chunk)) {
4222 /* Some is playing games with us. */
4225 if (chk_len < sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY) {
4227 * Not enough data bytes available in the
4230 SCTP_STAT_INCR(sctps_pdrpnedat);
4233 if (offset + sizeof(struct sctp_idata_chunk) + SCTP_NUM_DB_TO_VERIFY > limit) {
4234 /* Not enough data in buffer. */
4237 idata_chunk = (struct sctp_idata_chunk *)(cp->data + offset);
4238 memcpy(desc.data_bytes, idata_chunk + 1, SCTP_NUM_DB_TO_VERIFY);
4239 desc.tsn_ifany = idata_chunk->dp.tsn;
4240 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4241 SCTP_STAT_INCR(sctps_pdrpmbda);
4244 if (pktdrp_flags & SCTP_FROM_MIDDLE_BOX) {
4245 SCTP_STAT_INCR(sctps_pdrpmbct);
4248 if (process_chunk_drop(stcb, &desc, net, pktdrp_flags)) {
4249 SCTP_STAT_INCR(sctps_pdrppdbrk);
4253 offset += SCTP_SIZE32(chk_len);
4255 /* Now update any rwnd --- possibly */
4256 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
4257 /* From a peer, we get a rwnd report */
4260 SCTP_STAT_INCR(sctps_pdrpfehos);
4262 bottle_bw = ntohl(cp->bottle_bw);
4263 on_queue = ntohl(cp->current_onq);
4264 if (bottle_bw && on_queue) {
4265 /* a rwnd report is in here */
4266 if (bottle_bw > on_queue)
4267 a_rwnd = bottle_bw - on_queue;
4272 stcb->asoc.peers_rwnd = 0;
4274 if (a_rwnd > stcb->asoc.total_flight) {
4275 stcb->asoc.peers_rwnd =
4276 a_rwnd - stcb->asoc.total_flight;
4278 stcb->asoc.peers_rwnd = 0;
4280 if (stcb->asoc.peers_rwnd <
4281 stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
4282 /* SWS sender side engages */
4283 stcb->asoc.peers_rwnd = 0;
4288 SCTP_STAT_INCR(sctps_pdrpfmbox);
4291 /* now middle boxes in sat networks get a cwnd bump */
4292 if ((pktdrp_flags & SCTP_FROM_MIDDLE_BOX) &&
4293 (stcb->asoc.sat_t3_loss_recovery == 0) &&
4294 (stcb->asoc.sat_network)) {
4296 * This is debatable but for sat networks it makes sense
4297 * Note if a T3 timer has went off, we will prohibit any
4298 * changes to cwnd until we exit the t3 loss recovery.
4300 stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
4301 net, cp, &bottle_bw, &on_queue);
4306 * handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
4307 * still contain IP/SCTP header - stcb: is the tcb found for this packet -
4308 * offset: offset into the mbuf chain to first chunkhdr - length: is the
4309 * length of the complete packet outputs: - length: modified to remaining
4310 * length after control processing - netp: modified to new sctp_nets after
4311 * cookie-echo processing - return NULL to discard the packet (ie. no asoc,
4312 * bad packet,...) otherwise return the tcb for this packet
4315 __attribute__((noinline))
4317 static struct sctp_tcb *
4318 sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
4319 struct sockaddr *src, struct sockaddr *dst,
4320 struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
4321 struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
4322 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
4323 uint32_t vrf_id, uint16_t port)
4325 struct sctp_association *asoc;
4326 struct mbuf *op_err;
4327 char msg[SCTP_DIAG_INFO_LEN];
4329 int num_chunks = 0; /* number of control chunks processed */
4330 uint32_t chk_length, contiguous;
4332 int abort_no_unlock = 0;
4337 * How big should this be, and should it be alloc'd? Lets try the
4338 * d-mtu-ceiling for now (2k) and that should hopefully work ...
4339 * until we get into jumbo grams and such..
4341 uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
4343 uint32_t auth_offset = 0, auth_len = 0;
4344 int auth_skipped = 0;
4347 SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
4348 iphlen, *offset, length, (void *)stcb);
4351 SCTP_TCB_LOCK_ASSERT(stcb);
4353 /* validate chunk header length... */
4354 if (ntohs(ch->chunk_length) < sizeof(*ch)) {
4355 SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
4356 ntohs(ch->chunk_length));
4361 * validate the verification tag
4363 vtag_in = ntohl(sh->v_tag);
4365 if (ch->chunk_type == SCTP_INITIATION) {
4366 SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
4367 ntohs(ch->chunk_length), vtag_in);
4369 /* protocol error- silently discard... */
4370 SCTP_STAT_INCR(sctps_badvtag);
4372 SCTP_TCB_UNLOCK(stcb);
4376 } else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
4378 * If there is no stcb, skip the AUTH chunk and process
4379 * later after a stcb is found (to validate the lookup was
4382 if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
4384 (inp->auth_supported == 1)) {
4385 /* save this chunk for later processing */
4387 auth_offset = *offset;
4388 auth_len = ntohs(ch->chunk_length);
4390 /* (temporarily) move past this chunk */
4391 *offset += SCTP_SIZE32(auth_len);
4392 if (*offset >= length) {
4393 /* no more data left in the mbuf chain */
4397 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4398 sizeof(struct sctp_chunkhdr), chunk_buf);
4405 if (ch->chunk_type == SCTP_COOKIE_ECHO) {
4406 goto process_control_chunks;
4409 * first check if it's an ASCONF with an unknown src addr we
4410 * need to look inside to find the association
4412 if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
4413 struct sctp_chunkhdr *asconf_ch = ch;
4414 uint32_t asconf_offset = 0, asconf_len = 0;
4416 /* inp's refcount may be reduced */
4417 SCTP_INP_INCR_REF(inp);
4419 asconf_offset = *offset;
4421 asconf_len = ntohs(asconf_ch->chunk_length);
4422 if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
4424 stcb = sctp_findassociation_ep_asconf(m,
4427 sh, &inp, netp, vrf_id);
4430 asconf_offset += SCTP_SIZE32(asconf_len);
4431 asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
4432 sizeof(struct sctp_chunkhdr), chunk_buf);
4433 } while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
4436 * reduce inp's refcount if not reduced in
4437 * sctp_findassociation_ep_asconf().
4439 SCTP_INP_DECR_REF(inp);
4442 /* now go back and verify any auth chunk to be sure */
4443 if (auth_skipped && (stcb != NULL)) {
4444 struct sctp_auth_chunk *auth;
4446 if (auth_len <= SCTP_CHUNK_BUFFER_SIZE) {
4447 auth = (struct sctp_auth_chunk *)sctp_m_getptr(m, auth_offset, auth_len, chunk_buf);
4453 if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
4455 /* auth HMAC failed so dump it */
4459 /* remaining chunks are HMAC checked */
4460 stcb->asoc.authenticated = 1;
4465 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
4466 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
4468 /* no association, so it's out of the blue... */
4469 sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
4470 mflowtype, mflowid, inp->fibnum,
4476 /* ABORT and SHUTDOWN can use either v_tag... */
4477 if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
4478 (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
4479 (ch->chunk_type == SCTP_PACKET_DROPPED)) {
4480 /* Take the T-bit always into account. */
4481 if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
4482 (vtag_in == asoc->my_vtag)) ||
4483 (((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
4484 (asoc->peer_vtag != htonl(0)) &&
4485 (vtag_in == asoc->peer_vtag))) {
4488 /* drop this packet... */
4489 SCTP_STAT_INCR(sctps_badvtag);
4491 SCTP_TCB_UNLOCK(stcb);
4496 /* for all other chunks, vtag must match */
4497 if (vtag_in != asoc->my_vtag) {
4498 /* invalid vtag... */
4499 SCTPDBG(SCTP_DEBUG_INPUT3,
4500 "invalid vtag: %xh, expect %xh\n",
4501 vtag_in, asoc->my_vtag);
4502 SCTP_STAT_INCR(sctps_badvtag);
4504 SCTP_TCB_UNLOCK(stcb);
4510 } /* end if !SCTP_COOKIE_ECHO */
4512 * process all control chunks...
4514 if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
4515 (ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
4516 (ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
4517 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
4518 /* implied cookie-ack.. we must have lost the ack */
4519 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
4523 process_control_chunks:
4524 while (IS_SCTP_CONTROL(ch)) {
4525 /* validate chunk length */
4526 chk_length = ntohs(ch->chunk_length);
4527 SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
4528 ch->chunk_type, chk_length);
4529 SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
4530 if (chk_length < sizeof(*ch) ||
4531 (*offset + (int)chk_length) > length) {
4535 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
4537 * INIT and INIT-ACK only gets the init ack "header" portion
4538 * only because we don't have to process the peer's COOKIE.
4539 * All others get a complete chunk.
4541 switch (ch->chunk_type) {
4542 case SCTP_INITIATION:
4543 contiguous = sizeof(struct sctp_init_chunk);
4545 case SCTP_INITIATION_ACK:
4546 contiguous = sizeof(struct sctp_init_ack_chunk);
4549 contiguous = min(chk_length, sizeof(chunk_buf));
4552 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
4561 /* Save off the last place we got a control from */
4563 if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
4565 * allow last_control to be NULL if
4566 * ASCONF... ASCONF processing will find the
4569 if ((netp != NULL) && (*netp != NULL))
4570 stcb->asoc.last_control_chunk_from = *netp;
4573 #ifdef SCTP_AUDITING_ENABLED
4574 sctp_audit_log(0xB0, ch->chunk_type);
4577 /* check to see if this chunk required auth, but isn't */
4578 if ((stcb != NULL) &&
4579 sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
4580 !stcb->asoc.authenticated) {
4581 /* "silently" ignore */
4582 SCTP_STAT_INCR(sctps_recvauthmissing);
4585 switch (ch->chunk_type) {
4586 case SCTP_INITIATION:
4587 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
4588 /* The INIT chunk must be the only chunk. */
4589 if ((num_chunks > 1) ||
4590 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4592 * RFC 4960bis requires stopping the
4593 * processing of the packet.
4598 /* Honor our resource limit. */
4599 if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
4600 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4601 sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
4602 mflowtype, mflowid, inp->fibnum,
4606 SCTP_TCB_UNLOCK(stcb);
4610 sctp_handle_init(m, iphlen, *offset, src, dst, sh,
4611 (struct sctp_init_chunk *)ch, inp,
4617 SCTP_TCB_UNLOCK(stcb);
4621 case SCTP_PAD_CHUNK:
4623 case SCTP_INITIATION_ACK:
4624 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT_ACK\n");
4625 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4626 /* We are not interested anymore */
4627 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size)) {
4632 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4633 SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
4638 /* The INIT-ACK chunk must be the only chunk. */
4639 if ((num_chunks > 1) ||
4640 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
4644 if ((netp != NULL) && (*netp != NULL)) {
4645 ret = sctp_handle_init_ack(m, iphlen, *offset,
4647 (struct sctp_init_ack_chunk *)ch,
4656 if (abort_no_unlock) {
4660 * Special case, I must call the output routine to
4661 * get the cookie echoed
4663 if ((stcb != NULL) && (ret == 0)) {
4664 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
4668 case SCTP_SELECTIVE_ACK:
4669 case SCTP_NR_SELECTIVE_ACK:
4672 uint32_t a_rwnd, cum_ack;
4673 uint16_t num_seg, num_nr_seg, num_dup;
4675 int offset_seg, offset_dup;
4677 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
4678 ch->chunk_type == SCTP_SELECTIVE_ACK ? "SCTP_SACK" : "SCTP_NR_SACK");
4679 SCTP_STAT_INCR(sctps_recvsacks);
4681 SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing %s chunk\n",
4682 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK");
4685 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4686 if (chk_length < sizeof(struct sctp_sack_chunk)) {
4687 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
4691 if (stcb->asoc.nrsack_supported == 0) {
4694 if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
4695 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR_SACK chunk, too small\n");
4699 if (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
4701 * If we have sent a shutdown-ack, we will pay no
4702 * attention to a sack sent in to us since
4703 * we don't care anymore.
4707 flags = ch->chunk_flags;
4708 if (ch->chunk_type == SCTP_SELECTIVE_ACK) {
4709 struct sctp_sack_chunk *sack;
4711 sack = (struct sctp_sack_chunk *)ch;
4712 cum_ack = ntohl(sack->sack.cum_tsn_ack);
4713 num_seg = ntohs(sack->sack.num_gap_ack_blks);
4715 num_dup = ntohs(sack->sack.num_dup_tsns);
4716 a_rwnd = ntohl(sack->sack.a_rwnd);
4717 if (sizeof(struct sctp_sack_chunk) +
4718 num_seg * sizeof(struct sctp_gap_ack_block) +
4719 num_dup * sizeof(uint32_t) != chk_length) {
4720 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
4723 offset_seg = *offset + sizeof(struct sctp_sack_chunk);
4724 offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
4726 struct sctp_nr_sack_chunk *nr_sack;
4728 nr_sack = (struct sctp_nr_sack_chunk *)ch;
4729 cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
4730 num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
4731 num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
4732 num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
4733 a_rwnd = ntohl(nr_sack->nr_sack.a_rwnd);
4734 if (sizeof(struct sctp_nr_sack_chunk) +
4735 (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
4736 num_dup * sizeof(uint32_t) != chk_length) {
4737 SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
4740 offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
4741 offset_dup = offset_seg + (num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block);
4743 SCTPDBG(SCTP_DEBUG_INPUT3, "%s process cum_ack:%x num_seg:%d a_rwnd:%d\n",
4744 (ch->chunk_type == SCTP_SELECTIVE_ACK) ? "SCTP_SACK" : "SCTP_NR_SACK",
4745 cum_ack, num_seg, a_rwnd);
4746 stcb->asoc.seen_a_sack_this_pkt = 1;
4747 if ((stcb->asoc.pr_sctp_cnt == 0) &&
4748 (num_seg == 0) && (num_nr_seg == 0) &&
4749 SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
4750 (stcb->asoc.saw_sack_with_frags == 0) &&
4751 (stcb->asoc.saw_sack_with_nr_frags == 0) &&
4752 (!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
4754 * We have a SIMPLE sack having no
4755 * prior segments and data on sent
4756 * queue to be acked. Use the faster
4757 * path sack processing. We also
4758 * allow window update sacks with no
4759 * missing segments to go this way
4762 sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
4763 &abort_now, ecne_seen);
4765 if ((netp != NULL) && (*netp != NULL)) {
4766 sctp_handle_sack(m, offset_seg, offset_dup, stcb,
4767 num_seg, num_nr_seg, num_dup, &abort_now, flags,
4768 cum_ack, a_rwnd, ecne_seen);
4772 /* ABORT signal from sack processing */
4776 if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
4777 TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
4778 (stcb->asoc.stream_queue_cnt == 0)) {
4779 sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
4783 case SCTP_HEARTBEAT_REQUEST:
4784 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
4785 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4786 SCTP_STAT_INCR(sctps_recvheartbeat);
4787 sctp_send_heartbeat_ack(stcb, m, *offset,
4791 case SCTP_HEARTBEAT_ACK:
4792 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT_ACK\n");
4793 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
4797 SCTP_STAT_INCR(sctps_recvheartbeatack);
4798 if ((netp != NULL) && (*netp != NULL)) {
4799 sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
4803 case SCTP_ABORT_ASSOCIATION:
4804 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
4807 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4808 if (sctp_handle_abort((struct sctp_abort_chunk *)ch, stcb, *netp)) {
4818 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
4820 if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
4823 if ((netp != NULL) && (*netp != NULL)) {
4825 sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
4826 stcb, *netp, &abort_flag);
4833 case SCTP_SHUTDOWN_ACK:
4834 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_ACK, stcb %p\n", (void *)stcb);
4835 if ((chk_length == sizeof(struct sctp_shutdown_ack_chunk)) &&
4836 (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
4837 sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
4842 case SCTP_OPERATION_ERROR:
4843 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP_ERR\n");
4844 if ((stcb != NULL) && (netp != NULL) && (*netp != NULL) &&
4845 sctp_handle_error(ch, stcb, *netp, contiguous) < 0) {
4850 case SCTP_COOKIE_ECHO:
4851 SCTPDBG(SCTP_DEBUG_INPUT3,
4852 "SCTP_COOKIE_ECHO, stcb %p\n", (void *)stcb);
4853 if ((stcb != NULL) && (stcb->asoc.total_output_queue_size > 0)) {
4856 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4857 /* We are not interested anymore */
4860 SCTP_TCB_UNLOCK(stcb);
4867 * First are we accepting? We do this again here
4868 * since it is possible that a previous endpoint WAS
4869 * listening responded to a INIT-ACK and then
4870 * closed. We opened and bound.. and are now no
4873 * XXXGL: notes on checking listen queue length.
4874 * 1) SCTP_IS_LISTENING() doesn't necessarily mean
4875 * SOLISTENING(), because a listening "UDP type"
4876 * socket isn't listening in terms of the socket
4877 * layer. It is a normal data flow socket, that
4878 * can fork off new connections. Thus, we should
4879 * look into sol_qlen only in case we are !UDP.
4880 * 2) Checking sol_qlen in general requires locking
4881 * the socket, and this code lacks that.
4883 if ((stcb == NULL) &&
4884 (!SCTP_IS_LISTENING(inp) ||
4885 (!(inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) &&
4886 inp->sctp_socket->sol_qlen >= inp->sctp_socket->sol_qlimit))) {
4887 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
4888 (SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
4889 op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
4890 sctp_abort_association(inp, stcb, m, iphlen,
4891 src, dst, sh, op_err,
4898 struct mbuf *ret_buf;
4899 struct sctp_inpcb *linp;
4900 struct sctp_tmit_chunk *chk;
4902 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
4903 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4914 SCTP_ASOC_CREATE_LOCK(linp);
4918 struct sctp_tcb *locked_stcb;
4922 sctp_handle_cookie_echo(m, iphlen,
4926 (struct sctp_cookie_echo_chunk *)ch,
4936 if ((locked_stcb != NULL) && (locked_stcb != stcb)) {
4937 SCTP_TCB_UNLOCK(locked_stcb);
4940 SCTP_TCB_LOCK_ASSERT(stcb);
4946 SCTP_ASOC_CREATE_UNLOCK(linp);
4948 if (ret_buf == NULL) {
4950 SCTP_TCB_UNLOCK(stcb);
4952 SCTPDBG(SCTP_DEBUG_INPUT3,
4953 "GAK, null buffer\n");
4957 /* if AUTH skipped, see if it verified... */
4962 /* Restart the timer if we have pending data */
4963 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
4964 if (chk->whoTo != NULL) {
4969 sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
4973 case SCTP_COOKIE_ACK:
4974 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE_ACK, stcb %p\n", (void *)stcb);
4975 if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
4978 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4979 /* We are not interested anymore */
4980 if ((stcb) && (stcb->asoc.total_output_queue_size)) {
4983 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
4984 SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
4989 if ((netp != NULL) && (*netp != NULL)) {
4990 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
4994 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_ECHO\n");
4998 if (stcb->asoc.ecn_supported == 0) {
5001 if ((chk_length != sizeof(struct sctp_ecne_chunk)) &&
5002 (chk_length != sizeof(struct old_sctp_ecne_chunk))) {
5005 sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch, stcb);
5009 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN_CWR\n");
5013 if (stcb->asoc.ecn_supported == 0) {
5016 if (chk_length != sizeof(struct sctp_cwr_chunk)) {
5019 sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
5021 case SCTP_SHUTDOWN_COMPLETE:
5022 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN_COMPLETE, stcb %p\n", (void *)stcb);
5023 /* must be first and only chunk */
5024 if ((num_chunks > 1) ||
5025 (length - *offset > (int)SCTP_SIZE32(chk_length))) {
5029 if ((chk_length == sizeof(struct sctp_shutdown_complete_chunk)) &&
5030 (stcb != NULL) && (netp != NULL) && (*netp != NULL)) {
5031 sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
5038 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
5040 if (stcb->asoc.asconf_supported == 0) {
5043 sctp_handle_asconf(m, *offset, src,
5044 (struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
5048 case SCTP_ASCONF_ACK:
5049 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF_ACK\n");
5053 if (stcb->asoc.asconf_supported == 0) {
5056 if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
5059 if ((netp != NULL) && (*netp != NULL)) {
5060 /* He's alive so give him credit */
5061 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
5062 sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
5063 stcb->asoc.overall_error_count,
5065 SCTP_FROM_SCTP_INPUT,
5068 stcb->asoc.overall_error_count = 0;
5069 sctp_handle_asconf_ack(m, *offset,
5070 (struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
5071 if (abort_no_unlock)
5075 case SCTP_FORWARD_CUM_TSN:
5076 case SCTP_IFORWARD_CUM_TSN:
5077 SCTPDBG(SCTP_DEBUG_INPUT3, "%s\n",
5078 ch->chunk_type == SCTP_FORWARD_CUM_TSN ? "FORWARD_TSN" : "I_FORWARD_TSN");
5082 if (stcb->asoc.prsctp_supported == 0) {
5085 if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
5088 if (((stcb->asoc.idata_supported == 1) && (ch->chunk_type == SCTP_FORWARD_CUM_TSN)) ||
5089 ((stcb->asoc.idata_supported == 0) && (ch->chunk_type == SCTP_IFORWARD_CUM_TSN))) {
5090 if (ch->chunk_type == SCTP_FORWARD_CUM_TSN) {
5091 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "FORWARD-TSN chunk received when I-FORWARD-TSN was negotiated");
5093 SCTP_SNPRINTF(msg, sizeof(msg), "%s", "I-FORWARD-TSN chunk received when FORWARD-TSN was negotiated");
5095 op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, msg);
5096 sctp_abort_an_association(inp, stcb, op_err, false, SCTP_SO_NOT_LOCKED);
5101 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5102 /* We are not interested anymore */
5103 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
5104 SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
5109 * For sending a SACK this looks like DATA chunks.
5111 stcb->asoc.last_data_chunk_from = stcb->asoc.last_control_chunk_from;
5113 sctp_handle_forward_tsn(stcb,
5114 (struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
5120 case SCTP_STREAM_RESET:
5121 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
5125 if (stcb->asoc.reconfig_supported == 0) {
5128 if (chk_length < sizeof(struct sctp_stream_reset_tsn_req)) {
5131 if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
5132 /* stop processing */
5137 case SCTP_PACKET_DROPPED:
5138 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
5142 if (stcb->asoc.pktdrop_supported == 0) {
5145 if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
5148 if ((netp != NULL) && (*netp != NULL)) {
5149 sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
5151 min(chk_length, contiguous));
5154 case SCTP_AUTHENTICATION:
5155 SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
5157 /* save the first AUTH for later processing */
5158 if (auth_skipped == 0) {
5159 auth_offset = *offset;
5160 auth_len = chk_length;
5163 /* skip this chunk (temporarily) */
5166 if (stcb->asoc.auth_supported == 0) {
5169 if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
5170 (chk_length > (sizeof(struct sctp_auth_chunk) +
5171 SCTP_AUTH_DIGEST_LEN_MAX))) {
5176 if (got_auth == 1) {
5177 /* skip this chunk... it's already auth'd */
5181 if (sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch, m, *offset)) {
5182 /* auth HMAC failed so dump the packet */
5186 /* remaining chunks are HMAC checked */
5187 stcb->asoc.authenticated = 1;
5193 /* it's an unknown chunk! */
5194 if ((ch->chunk_type & 0x40) &&
5196 (SCTP_GET_STATE(stcb) != SCTP_STATE_EMPTY) &&
5197 (SCTP_GET_STATE(stcb) != SCTP_STATE_INUSE) &&
5198 (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
5199 struct sctp_gen_error_cause *cause;
5202 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
5203 0, M_NOWAIT, 1, MT_DATA);
5204 if (op_err != NULL) {
5205 len = min(SCTP_SIZE32(chk_length), (uint32_t)(length - *offset));
5206 cause = mtod(op_err, struct sctp_gen_error_cause *);
5207 cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
5208 cause->length = htons((uint16_t)(len + sizeof(struct sctp_gen_error_cause)));
5209 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5210 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
5211 if (SCTP_BUF_NEXT(op_err) != NULL) {
5212 #ifdef SCTP_MBUF_LOGGING
5213 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5214 sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
5217 sctp_queue_op_err(stcb, op_err);
5219 sctp_m_freem(op_err);
5223 if ((ch->chunk_type & 0x80) == 0) {
5224 /* discard this packet */
5227 } /* else skip this bad chunk and continue... */
5229 } /* switch (ch->chunk_type) */
5232 /* get the next chunk */
5233 *offset += SCTP_SIZE32(chk_length);
5234 if (*offset >= length) {
5235 /* no more data left in the mbuf chain */
5238 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
5239 sizeof(struct sctp_chunkhdr), chunk_buf);
5246 if ((asconf_cnt > 0) && (stcb != NULL)) {
5247 sctp_send_asconf_ack(stcb);
5253 * common input chunk processing (v4 and v6)
5256 sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
5257 struct sockaddr *src, struct sockaddr *dst,
5258 struct sctphdr *sh, struct sctp_chunkhdr *ch,
5259 uint8_t compute_crc,
5261 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
5262 uint32_t vrf_id, uint16_t port)
5265 int fwd_tsn_seen = 0, data_processed = 0;
5266 struct mbuf *m = *mm, *op_err;
5267 char msg[SCTP_DIAG_INFO_LEN];
5269 int cnt_ctrl_ready = 0;
5270 struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
5271 struct sctp_tcb *stcb = NULL;
5272 struct sctp_nets *net = NULL;
5274 SCTP_STAT_INCR(sctps_recvdatagrams);
5275 #ifdef SCTP_AUDITING_ENABLED
5276 sctp_audit_log(0xE0, 1);
5277 sctp_auditing(0, inp, stcb, net);
5279 if (compute_crc != 0) {
5280 uint32_t check, calc_check;
5282 check = sh->checksum;
5284 calc_check = sctp_calculate_cksum(m, iphlen);
5285 sh->checksum = check;
5286 if (calc_check != check) {
5287 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
5288 calc_check, check, (void *)m, length, iphlen);
5289 stcb = sctp_findassociation_addr(m, offset, src, dst,
5290 sh, ch, &inp, &net, vrf_id);
5291 #if defined(INET) || defined(INET6)
5292 if ((ch->chunk_type != SCTP_INITIATION) &&
5293 (net != NULL) && (net->port != port)) {
5294 if (net->port == 0) {
5295 /* UDP encapsulation turned on. */
5296 net->mtu -= sizeof(struct udphdr);
5297 if (stcb->asoc.smallest_mtu > net->mtu) {
5298 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5300 } else if (port == 0) {
5301 /* UDP encapsulation turned off. */
5302 net->mtu += sizeof(struct udphdr);
5303 /* XXX Update smallest_mtu */
5309 net->flowtype = mflowtype;
5310 net->flowid = mflowid;
5312 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5313 if ((inp != NULL) && (stcb != NULL)) {
5314 sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
5315 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
5316 } else if ((inp != NULL) && (stcb == NULL)) {
5319 SCTP_STAT_INCR(sctps_badsum);
5320 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
5324 /* Destination port of 0 is illegal, based on RFC4960. */
5325 if (sh->dest_port == 0) {
5326 SCTP_STAT_INCR(sctps_hdrops);
5329 stcb = sctp_findassociation_addr(m, offset, src, dst,
5330 sh, ch, &inp, &net, vrf_id);
5331 #if defined(INET) || defined(INET6)
5332 if ((ch->chunk_type != SCTP_INITIATION) &&
5333 (net != NULL) && (net->port != port)) {
5334 if (net->port == 0) {
5335 /* UDP encapsulation turned on. */
5336 net->mtu -= sizeof(struct udphdr);
5337 if (stcb->asoc.smallest_mtu > net->mtu) {
5338 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5340 } else if (port == 0) {
5341 /* UDP encapsulation turned off. */
5342 net->mtu += sizeof(struct udphdr);
5343 /* XXX Update smallest_mtu */
5349 net->flowtype = mflowtype;
5350 net->flowid = mflowid;
5353 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5354 SCTP_STAT_INCR(sctps_noport);
5355 if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
5358 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
5359 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
5360 sctp_send_shutdown_complete2(src, dst, sh,
5361 mflowtype, mflowid, fibnum,
5365 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
5366 SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
5369 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
5370 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
5371 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
5372 (ch->chunk_type != SCTP_INIT))) {
5373 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5375 sctp_send_abort(m, iphlen, src, dst,
5377 mflowtype, mflowid, fibnum,
5382 } else if (stcb == NULL) {
5385 SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
5386 (void *)m, iphlen, offset, length, (void *)stcb);
5388 /* always clear this before beginning a packet */
5389 stcb->asoc.authenticated = 0;
5390 stcb->asoc.seen_a_sack_this_pkt = 0;
5391 SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
5392 (void *)stcb, stcb->asoc.state);
5394 if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
5395 (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
5397 * If we hit here, we had a ref count
5398 * up when the assoc was aborted and the
5399 * timer is clearing out the assoc, we should
5400 * NOT respond to any packet.. its OOTB.
5402 SCTP_TCB_UNLOCK(stcb);
5404 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5405 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5406 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5408 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5409 mflowtype, mflowid, inp->fibnum,
5414 if (IS_SCTP_CONTROL(ch)) {
5415 /* process the control portion of the SCTP packet */
5416 /* sa_ignore NO_NULL_CHK */
5417 stcb = sctp_process_control(m, iphlen, &offset, length,
5419 inp, stcb, &net, &fwd_tsn_seen,
5420 mflowtype, mflowid, fibnum,
5424 * This covers us if the cookie-echo was there and
5425 * it changes our INP.
5427 inp = stcb->sctp_ep;
5428 #if defined(INET) || defined(INET6)
5429 if ((ch->chunk_type != SCTP_INITIATION) &&
5430 (net != NULL) && (net->port != port)) {
5431 if (net->port == 0) {
5432 /* UDP encapsulation turned on. */
5433 net->mtu -= sizeof(struct udphdr);
5434 if (stcb->asoc.smallest_mtu > net->mtu) {
5435 sctp_pathmtu_adjustment(stcb, net->mtu, true);
5437 } else if (port == 0) {
5438 /* UDP encapsulation turned off. */
5439 net->mtu += sizeof(struct udphdr);
5440 /* XXX Update smallest_mtu */
5448 * no control chunks, so pre-process DATA chunks (these
5449 * checks are taken care of by control processing)
5453 * if DATA only packet, and auth is required, then punt...
5454 * can't have authenticated without any AUTH (control)
5457 if ((stcb != NULL) &&
5458 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
5459 /* "silently" ignore */
5460 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5461 SCTP_STAT_INCR(sctps_recvauthmissing);
5465 /* out of the blue DATA chunk */
5466 SCTP_PROBE5(receive, NULL, NULL, m, NULL, sh);
5467 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5468 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5470 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5471 mflowtype, mflowid, fibnum,
5475 if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
5476 /* v_tag mismatch! */
5477 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5478 SCTP_STAT_INCR(sctps_badvtag);
5483 SCTP_PROBE5(receive, NULL, stcb, m, stcb, sh);
5486 * no valid TCB for this packet, or we found it's a bad
5487 * packet while processing control, or we're done with this
5488 * packet (done or skip rest of data), so we drop it...
5494 * DATA chunk processing
5496 /* plow through the data chunks while length > offset */
5499 * Rest should be DATA only. Check authentication state if AUTH for
5502 if ((length > offset) &&
5504 sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
5505 !stcb->asoc.authenticated) {
5506 /* "silently" ignore */
5507 SCTP_STAT_INCR(sctps_recvauthmissing);
5508 SCTPDBG(SCTP_DEBUG_AUTH1,
5509 "Data chunk requires AUTH, skipped\n");
5512 if (length > offset) {
5516 * First check to make sure our state is correct. We would
5517 * not get here unless we really did have a tag, so we don't
5518 * abort if this happens, just dump the chunk silently.
5520 switch (SCTP_GET_STATE(stcb)) {
5521 case SCTP_STATE_COOKIE_ECHOED:
5523 * we consider data with valid tags in this state
5524 * shows us the cookie-ack was lost. Imply it was
5527 sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
5529 case SCTP_STATE_COOKIE_WAIT:
5531 * We consider OOTB any data sent during asoc setup.
5533 SCTP_SNPRINTF(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
5534 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5536 sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
5537 mflowtype, mflowid, inp->fibnum,
5540 /* sa_ignore NOTREACHED */
5542 case SCTP_STATE_EMPTY: /* should not happen */
5543 case SCTP_STATE_INUSE: /* should not happen */
5544 case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
5545 case SCTP_STATE_SHUTDOWN_ACK_SENT:
5548 /* sa_ignore NOTREACHED */
5550 case SCTP_STATE_OPEN:
5551 case SCTP_STATE_SHUTDOWN_SENT:
5554 /* plow through the data chunks while length > offset */
5555 retval = sctp_process_data(mm, iphlen, &offset, length,
5556 inp, stcb, net, &high_tsn);
5559 * The association aborted, NO UNLOCK needed since
5560 * the association is destroyed.
5569 * Anything important needs to have been m_copy'ed in
5574 /* take care of ecn */
5575 if ((data_processed == 1) &&
5576 (stcb->asoc.ecn_supported == 1) &&
5577 ((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
5578 /* Yep, we need to add a ECNE */
5579 sctp_send_ecn_echo(stcb, net, high_tsn);
5582 if ((data_processed == 0) && (fwd_tsn_seen)) {
5584 uint32_t highest_tsn;
5586 if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
5587 highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
5589 highest_tsn = stcb->asoc.highest_tsn_inside_map;
5591 was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
5592 stcb->asoc.send_sack = 1;
5593 sctp_sack_check(stcb, was_a_gap);
5594 } else if (fwd_tsn_seen) {
5595 stcb->asoc.send_sack = 1;
5597 /* trigger send of any chunks in queue... */
5599 #ifdef SCTP_AUDITING_ENABLED
5600 sctp_audit_log(0xE0, 2);
5601 sctp_auditing(1, inp, stcb, net);
5603 SCTPDBG(SCTP_DEBUG_INPUT1,
5604 "Check for chunk output prw:%d tqe:%d tf=%d\n",
5605 stcb->asoc.peers_rwnd,
5606 TAILQ_EMPTY(&stcb->asoc.control_send_queue),
5607 stcb->asoc.total_flight);
5608 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
5609 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
5610 cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
5612 if (!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue) ||
5614 stcb->asoc.trigger_reset ||
5616 (stcb->asoc.peers_rwnd > 0 || stcb->asoc.total_flight == 0))) {
5617 SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
5618 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
5619 SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
5621 #ifdef SCTP_AUDITING_ENABLED
5622 sctp_audit_log(0xE0, 3);
5623 sctp_auditing(2, inp, stcb, net);
5627 SCTP_TCB_UNLOCK(stcb);
5629 if (inp_decr != NULL) {
5630 /* reduce ref-count */
5631 SCTP_INP_WLOCK(inp_decr);
5632 SCTP_INP_DECR_REF(inp_decr);
5633 SCTP_INP_WUNLOCK(inp_decr);
5640 sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
5644 uint32_t vrf_id = 0;
5646 struct sockaddr_in src, dst;
5649 struct sctp_chunkhdr *ch;
5651 uint8_t compute_crc;
5657 if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
5658 SCTP_RELEASE_PKT(i_pak);
5661 m = SCTP_HEADER_TO_CHAIN(i_pak);
5662 #ifdef SCTP_MBUF_LOGGING
5663 /* Log in any input mbufs */
5664 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
5665 sctp_log_mbc(m, SCTP_MBUF_INPUT);
5668 #ifdef SCTP_PACKET_LOGGING
5669 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
5673 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
5674 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
5676 if_name(m->m_pkthdr.rcvif),
5677 (int)m->m_pkthdr.csum_flags, CSUM_BITS);
5678 mflowid = m->m_pkthdr.flowid;
5679 mflowtype = M_HASHTYPE_GET(m);
5680 fibnum = M_GETFIB(m);
5681 SCTP_STAT_INCR(sctps_recvpackets);
5682 SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
5683 /* Get IP, SCTP, and first chunk header together in the first mbuf. */
5684 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5685 if (SCTP_BUF_LEN(m) < offset) {
5686 if ((m = m_pullup(m, offset)) == NULL) {
5687 SCTP_STAT_INCR(sctps_hdrops);
5691 ip = mtod(m, struct ip *);
5692 sh = (struct sctphdr *)((caddr_t)ip + iphlen);
5693 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
5694 offset -= sizeof(struct sctp_chunkhdr);
5695 memset(&src, 0, sizeof(struct sockaddr_in));
5696 src.sin_family = AF_INET;
5697 src.sin_len = sizeof(struct sockaddr_in);
5698 src.sin_port = sh->src_port;
5699 src.sin_addr = ip->ip_src;
5700 memset(&dst, 0, sizeof(struct sockaddr_in));
5701 dst.sin_family = AF_INET;
5702 dst.sin_len = sizeof(struct sockaddr_in);
5703 dst.sin_port = sh->dest_port;
5704 dst.sin_addr = ip->ip_dst;
5705 length = ntohs(ip->ip_len);
5706 /* Validate mbuf chain length with IP payload length. */
5707 if (SCTP_HEADER_LEN(m) != length) {
5708 SCTPDBG(SCTP_DEBUG_INPUT1,
5709 "sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
5710 SCTP_STAT_INCR(sctps_hdrops);
5713 /* SCTP does not allow broadcasts or multicasts */
5714 if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
5717 if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
5720 ecn_bits = ip->ip_tos;
5721 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
5722 SCTP_STAT_INCR(sctps_recvhwcrc);
5725 SCTP_STAT_INCR(sctps_recvswcrc);
5728 sctp_common_input_processing(&m, iphlen, offset, length,
5729 (struct sockaddr *)&src,
5730 (struct sockaddr *)&dst,
5734 mflowtype, mflowid, fibnum,
5743 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5744 extern int *sctp_cpuarry;
5748 sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
5755 #if defined(SCTP_MCORE_INPUT) && defined(SMP)
5761 uint32_t flowid, tag;
5763 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
5764 flowid = m->m_pkthdr.flowid;
5767 * No flow id built by lower layers fix it so we
5770 offset = off + sizeof(struct sctphdr);
5771 if (SCTP_BUF_LEN(m) < offset) {
5772 if ((m = m_pullup(m, offset)) == NULL) {
5773 SCTP_STAT_INCR(sctps_hdrops);
5774 return (IPPROTO_DONE);
5777 ip = mtod(m, struct ip *);
5778 sh = (struct sctphdr *)((caddr_t)ip + off);
5779 tag = htonl(sh->v_tag);
5780 flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
5781 m->m_pkthdr.flowid = flowid;
5782 M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE_HASH);
5784 cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
5785 sctp_queue_to_mcore(m, off, cpu_to_use);
5786 return (IPPROTO_DONE);
5789 sctp_input_with_port(m, off, 0);
5790 return (IPPROTO_DONE);